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/* Copyright (C) 2000-2004 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation.

   There are special exceptions to the terms and conditions of the GPL as it
   is applied to this software. View the full text of the exception in file
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   EXCEPTIONS-CLIENT in the directory of this software distribution.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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#include <my_global.h>
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#include <my_sys.h>
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#include <my_time.h>
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#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "mysql.h"
#include "mysql_version.h"
#include "mysqld_error.h"
#include "errmsg.h"
#include <violite.h>
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
#ifdef	 HAVE_PWD_H
#include <pwd.h>
#endif
#if !defined(MSDOS) && !defined(__WIN__)
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_SELECT_H
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#include <select.h>
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#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
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#endif /* !defined(MSDOS) && !defined(__WIN__) */
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#ifdef HAVE_POLL
#include <sys/poll.h>
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#endif
#ifdef HAVE_SYS_UN_H
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#include <sys/un.h>
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#endif
#if defined(THREAD) && !defined(__WIN__)
#include <my_pthread.h>				/* because of signal()	*/
#endif
#ifndef INADDR_NONE
#define INADDR_NONE	-1
#endif

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#include <sql_common.h>
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#include "client_settings.h"
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#undef net_buffer_length
#undef max_allowed_packet
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ulong 		net_buffer_length=8192;
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ulong		max_allowed_packet= 1024L*1024L*1024L;
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ulong		net_read_timeout=  CLIENT_NET_READ_TIMEOUT;
ulong		net_write_timeout= CLIENT_NET_WRITE_TIMEOUT;
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#ifdef EMBEDDED_LIBRARY
#undef net_flush
my_bool	net_flush(NET *net);
#endif

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#if defined(MSDOS) || defined(__WIN__)
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/* socket_errno is defined in my_global.h for all platforms */
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#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
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#endif /* __WIN__ */
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/*
  If allowed through some configuration, then this needs to
  be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
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#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)

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static void append_wild(char *to,char *end,const char *wild);
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sig_handler pipe_sig_handler(int sig);
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static my_bool mysql_client_init= 0;
static my_bool org_my_init_done= 0;

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/*
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  Initialize the MySQL client library
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  SYNOPSIS
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    mysql_server_init()
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  NOTES
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    Should be called before doing any other calls to the MySQL
    client library to initialize thread specific variables etc.
    It's called by mysql_init() to ensure that things will work for
    old not threaded applications that doesn't call mysql_server_init()
    directly.
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  RETURN
    0  ok
    1  could not initialize environment (out of memory or thread keys)
*/

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int STDCALL mysql_server_init(int argc __attribute__((unused)),
			      char **argv __attribute__((unused)),
			      char **groups __attribute__((unused)))
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{
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  int result= 0;
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  if (!mysql_client_init)
  {
    mysql_client_init=1;
    org_my_init_done=my_init_done;
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    if (my_init())				/* Will init threads */
      return 1;
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    init_client_errs();
    if (!mysql_port)
    {
      mysql_port = MYSQL_PORT;
#ifndef MSDOS
      {
	struct servent *serv_ptr;
	char	*env;
	if ((serv_ptr = getservbyname("mysql", "tcp")))
	  mysql_port = (uint) ntohs((ushort) serv_ptr->s_port);
	if ((env = getenv("MYSQL_TCP_PORT")))
	  mysql_port =(uint) atoi(env);
      }
#endif
    }
    if (!mysql_unix_port)
    {
      char *env;
#ifdef __WIN__
      mysql_unix_port = (char*) MYSQL_NAMEDPIPE;
#else
      mysql_unix_port = (char*) MYSQL_UNIX_ADDR;
#endif
      if ((env = getenv("MYSQL_UNIX_PORT")))
	mysql_unix_port = env;
    }
    mysql_debug(NullS);
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#if defined(SIGPIPE) && !defined(__WIN__) && !defined(__NETWARE__)
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    (void) signal(SIGPIPE, SIG_IGN);
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#endif
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#ifdef EMBEDDED_LIBRARY
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    if (argc > -1)
       result= init_embedded_server(argc, argv, groups);
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#endif
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  }
#ifdef THREAD
  else
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    result= (int)my_thread_init();         /* Init if new thread */
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#endif
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  return result;
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}
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void STDCALL mysql_server_end()
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{
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#ifdef EMBEDDED_LIBRARY
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  end_embedded_server();
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#endif
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  /* If library called my_init(), free memory allocated by it */
  if (!org_my_init_done)
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  {
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    my_end(0);
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#ifndef THREAD
  /* Remove TRACING, if enabled by mysql_debug() */
    DBUG_POP();
#endif
  }
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  else
    mysql_thread_end();
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  mysql_client_init= org_my_init_done= 0;
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}
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static MYSQL_PARAMETERS mysql_internal_parameters=
{&max_allowed_packet, &net_buffer_length};

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MYSQL_PARAMETERS *STDCALL mysql_get_parameters(void)
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{
  return &mysql_internal_parameters;
}

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my_bool STDCALL mysql_thread_init()
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{
#ifdef THREAD
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  return my_thread_init();
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#else
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  return 0;
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#endif
}

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void STDCALL mysql_thread_end()
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{
#ifdef THREAD
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  my_thread_end();
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#endif
}

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/*
  Let the user specify that we don't want SIGPIPE;  This doesn't however work
  with threaded applications as we can have multiple read in progress.
*/
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static MYSQL* spawn_init(MYSQL* parent, const char* host,
			 unsigned int port,
			 const char* user,
			 const char* passwd);

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/*
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  Expand wildcard to a sql string
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*/

static void
append_wild(char *to, char *end, const char *wild)
{
  end-=5;					/* Some extra */
  if (wild && wild[0])
  {
    to=strmov(to," like '");
    while (*wild && to < end)
    {
      if (*wild == '\\' || *wild == '\'')
	*to++='\\';
      *to++= *wild++;
    }
    if (*wild)					/* Too small buffer */
      *to++='%';				/* Nicer this way */
    to[0]='\'';
    to[1]=0;
  }
}


/**************************************************************************
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  Init debugging if MYSQL_DEBUG environment variable is found
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**************************************************************************/

void STDCALL
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mysql_debug(const char *debug __attribute__((unused)))
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{
#ifndef DBUG_OFF
  char	*env;
  if (_db_on_)
    return;					/* Already using debugging */
  if (debug)
  {
    DEBUGGER_ON;
    DBUG_PUSH(debug);
  }
  else if ((env = getenv("MYSQL_DEBUG")))
  {
    DEBUGGER_ON;
    DBUG_PUSH(env);
#if !defined(_WINVER) && !defined(WINVER)
    puts("\n-------------------------------------------------------");
    puts("MYSQL_DEBUG found. libmysql started with the following:");
    puts(env);
    puts("-------------------------------------------------------\n");
#else
    {
      char buff[80];
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      buff[sizeof(buff)-1]= 0;
      strxnmov(buff,sizeof(buff)-1,"libmysql: ", env, NullS);
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      MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
    }
#endif
  }
#endif
}


/**************************************************************************
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  Close the server connection if we get a SIGPIPE
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   ARGSUSED
**************************************************************************/

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sig_handler
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pipe_sig_handler(int sig __attribute__((unused)))
{
  DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
  (void) signal(SIGPIPE,pipe_sig_handler);
#endif
}

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/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
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				   unsigned long length)
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{
  DBUG_ENTER("mysql_master_query");
  if (mysql_master_send_query(mysql, q, length))
    DBUG_RETURN(1);
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  DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
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}
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my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
					unsigned long length)
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{
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  MYSQL *master = mysql->master;
  DBUG_ENTER("mysql_master_send_query");
  if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
    DBUG_RETURN(1);
  mysql->last_used_con = master;
  DBUG_RETURN(simple_command(master, COM_QUERY, q, length, 1));
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}


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/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
				  unsigned long length)
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{
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  DBUG_ENTER("mysql_slave_query");
  if (mysql_slave_send_query(mysql, q, length))
    DBUG_RETURN(1);
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  DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
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}


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my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
				   unsigned long length)
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{
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  MYSQL* last_used_slave, *slave_to_use = 0;
  DBUG_ENTER("mysql_slave_send_query");
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  if ((last_used_slave = mysql->last_used_slave))
    slave_to_use = last_used_slave->next_slave;
  else
    slave_to_use = mysql->next_slave;
  /*
    Next_slave is always safe to use - we have a circular list of slaves
    if there are no slaves, mysql->next_slave == mysql
  */
  mysql->last_used_con = mysql->last_used_slave = slave_to_use;
  if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
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						    0,0,0,0))
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    DBUG_RETURN(1);
  DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, q, length, 1));
}
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/* enable/disable parsing of all queries to decide
   if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
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{
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  mysql->options.rpl_parse = 1;
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}

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void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
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{
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  mysql->options.rpl_parse = 0;
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}

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/* get the value of the parse flag */
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
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{
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  return mysql->options.rpl_parse;
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}

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/*  enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
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{
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  mysql->options.no_master_reads = 0;
}
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void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
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{
  mysql->options.no_master_reads = 1;
}

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/* get the value of the master read flag */
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my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
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{
  return !(mysql->options.no_master_reads);
}

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/*
  We may get an error while doing replication internals.
  In this case, we add a special explanation to the original
  error
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*/
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static void expand_error(MYSQL* mysql, int error)
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{
  char tmp[MYSQL_ERRMSG_SIZE];
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  char *p;
  uint err_length;
  strmake(tmp, mysql->net.last_error, MYSQL_ERRMSG_SIZE-1);
  p = strmake(mysql->net.last_error, ER(error), MYSQL_ERRMSG_SIZE-1);
  err_length= (uint) (p - mysql->net.last_error);
  strmake(p, tmp, MYSQL_ERRMSG_SIZE-1 - err_length);
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  mysql->net.last_errno = error;
}

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/*
  This function assumes we have just called SHOW SLAVE STATUS and have
  read the given result and row
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*/
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static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
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{
  MYSQL* master;
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  DBUG_ENTER("get_master");
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  if (mysql_num_fields(res) < 3)
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    DBUG_RETURN(1); /* safety */
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  /* use the same username and password as the original connection */
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  if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
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    DBUG_RETURN(1);
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  mysql->master = master;
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  DBUG_RETURN(0);
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}

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/*
  Assuming we already know that mysql points to a master connection,
  retrieve all the slaves
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*/
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static my_bool get_slaves_from_master(MYSQL* mysql)
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{
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  MYSQL_RES* res = 0;
  MYSQL_ROW row;
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  my_bool error = 1;
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  int has_auth_info;
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  int port_ind;
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  DBUG_ENTER("get_slaves_from_master");
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  if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
  {
    expand_error(mysql, CR_PROBE_MASTER_CONNECT);
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    DBUG_RETURN(1);
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  }

  if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
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    DBUG_RETURN(1);
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  }

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  switch (mysql_num_fields(res)) {
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  case 5:
    has_auth_info = 0;
    port_ind=2;
    break;
  case 7:
    has_auth_info = 1;
    port_ind=4;
    break;
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  default:
    goto err;
  }

  while ((row = mysql_fetch_row(res)))
  {
    MYSQL* slave;
    const char* tmp_user, *tmp_pass;

    if (has_auth_info)
    {
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      tmp_user = row[2];
      tmp_pass = row[3];
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    }
    else
    {
      tmp_user = mysql->user;
      tmp_pass = mysql->passwd;
    }

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    if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
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			     tmp_user, tmp_pass)))
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      goto err;
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    /* Now add slave into the circular linked list */
    slave->next_slave = mysql->next_slave;
    mysql->next_slave = slave;
  }
  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}

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my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
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{
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  MYSQL_RES *res= 0;
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  MYSQL_ROW row;
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  my_bool error= 1;
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  DBUG_ENTER("mysql_rpl_probe");

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  /*
    First determine the replication role of the server we connected to
    the most reliable way to do this is to run SHOW SLAVE STATUS and see
    if we have a non-empty master host. This is still not fool-proof -
    it is not a sin to have a master that has a dormant slave thread with
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    a non-empty master host. However, it is more reliable to check
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    for empty master than whether the slave thread is actually running
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  */
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  if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_STATUS);
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    DBUG_RETURN(1);
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  }
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  row= mysql_fetch_row(res);
  /*
    Check master host for emptiness/NULL
    For MySQL 4.0 it's enough to check for row[0]
  */
  if (row && row[0] && *(row[0]))
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  {
    /* this is a slave, ask it for the master */
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    if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
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      goto err;
  }
  else
  {
    mysql->master = mysql;
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    if (get_slaves_from_master(mysql))
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      goto err;
  }

  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}


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/*
  Make a not so fool-proof decision on where the query should go, to
  the master or the slave. Ideally the user should always make this
  decision himself with mysql_master_query() or mysql_slave_query().
  However, to be able to more easily port the old code, we support the
  option of an educated guess - this should work for most applications,
  however, it may make the wrong decision in some particular cases. If
  that happens, the user would have to change the code to call
  mysql_master_query() or mysql_slave_query() explicitly in the place
  where we have made the wrong decision
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*/
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enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
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{
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  const char *q_end= q + len;
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  for (; q < q_end; ++q)
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  {
    char c;
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    if (my_isalpha(&my_charset_latin1, (c= *q)))
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    {
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      switch (my_tolower(&my_charset_latin1,c)) {
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      case 'i':  /* insert */
      case 'u':  /* update or unlock tables */
      case 'l':  /* lock tables or load data infile */
      case 'd':  /* drop or delete */
      case 'a':  /* alter */
	return MYSQL_RPL_MASTER;
      case 'c':  /* create or check */
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	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
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	  MYSQL_RPL_MASTER;
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      case 's': /* select or show */
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	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
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	  MYSQL_RPL_SLAVE;
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      case 'f': /* flush */
      case 'r': /* repair */
      case 'g': /* grant */
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	return MYSQL_RPL_ADMIN;
      default:
	return MYSQL_RPL_SLAVE;
      }
    }
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  }
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  return MYSQL_RPL_MASTER;		/* By default, send to master */
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}


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/**************************************************************************
  Connect to sql server
  If host == 0 then use localhost
**************************************************************************/
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#ifdef USE_OLD_FUNCTIONS
MYSQL * STDCALL
mysql_connect(MYSQL *mysql,const char *host,
	      const char *user, const char *passwd)
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{
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  MYSQL *res;
  mysql=mysql_init(mysql);			/* Make it thread safe */
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  {
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    DBUG_ENTER("mysql_connect");
    if (!(res=mysql_real_connect(mysql,host,user,passwd,NullS,0,NullS,0)))
    {
      if (mysql->free_me)
	my_free((gptr) mysql,MYF(0));
    }
    DBUG_RETURN(res);
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  }
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}
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#endif
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/**************************************************************************
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  Change user and database
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**************************************************************************/
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int cli_read_change_user_result(MYSQL *mysql, char *buff, const char *passwd)
{
  NET *net= &mysql->net;
  ulong pkt_length;

  pkt_length= net_safe_read(mysql);
  
  if (pkt_length == packet_error)
    return 1;

  if (pkt_length == 1 && net->read_pos[0] == 254 &&
      mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
  {
    /*
      By sending this very specific reply server asks us to send scrambled
      password in old format. The reply contains scramble_323.
    */
    scramble_323(buff, mysql->scramble, passwd);
    if (my_net_write(net, buff, SCRAMBLE_LENGTH_323 + 1) || net_flush(net))
    {
      net->last_errno= CR_SERVER_LOST;
      strmov(net->sqlstate, unknown_sqlstate);
      strmov(net->last_error,ER(net->last_errno));
      return 1;
    }
    /* Read what server thinks about out new auth message report */
    if (net_safe_read(mysql) == packet_error)
      return 1;
  }
  return 0;
}
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my_bool	STDCALL mysql_change_user(MYSQL *mysql, const char *user,
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				  const char *passwd, const char *db)
{
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  char buff[512],*end=buff;
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  int rc;
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  DBUG_ENTER("mysql_change_user");

  if (!user)
    user="";
  if (!passwd)
    passwd="";
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  /* Store user into the buffer */
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  end=strmov(end,user)+1;
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  /* write scrambled password according to server capabilities */
  if (passwd[0])
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  {
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    if (mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
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    {
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      *end++= SCRAMBLE_LENGTH;
      scramble(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH;
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    }
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    else
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    {
      scramble_323(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH_323 + 1;
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    }
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  }
  else
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    *end++= '\0';                               /* empty password */
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  /* Add database if needed */
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  end= strmov(end, db ? db : "") + 1;
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  /* Write authentication package */
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  simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (end-buff),1);
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  rc= (*mysql->methods->read_change_user_result)(mysql, buff, passwd);

  /*
    The server will close all statements no matter was the attempt
    to change user successful or not.
  */
  mysql_detach_stmt_list(&mysql->stmts);
  if (rc == 0)
  {
    /* Free old connect information */
    my_free(mysql->user,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->passwd,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));

    /* alloc new connect information */
    mysql->user=  my_strdup(user,MYF(MY_WME));
    mysql->passwd=my_strdup(passwd,MYF(MY_WME));
    mysql->db=    db ? my_strdup(db,MYF(MY_WME)) : 0;
  }
  DBUG_RETURN(rc);
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}

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#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif

#if defined(__NETWARE__)
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/* Default to value of USER on NetWare, if unset use "UNKNOWN_USER" */
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void read_user_name(char *name)
{
  char *str=getenv("USER");
  strmake(name, str ? str : "UNKNOWN_USER", USERNAME_LENGTH);
}

#elif !defined(MSDOS) && ! defined(VMS) && !defined(__WIN__) && !defined(OS2)

void read_user_name(char *name)
{
  DBUG_ENTER("read_user_name");
  if (geteuid() == 0)
    (void) strmov(name,"root");		/* allow use of surun */
  else
  {
#ifdef HAVE_GETPWUID
    struct passwd *skr;
    const char *str;
    if ((str=getlogin()) == NULL)
    {
      if ((skr=getpwuid(geteuid())) != NULL)
	str=skr->pw_name;
      else if (!(str=getenv("USER")) && !(str=getenv("LOGNAME")) &&
	       !(str=getenv("LOGIN")))
	str="UNKNOWN_USER";
    }
    (void) strmake(name,str,USERNAME_LENGTH);
#elif HAVE_CUSERID
    (void) cuserid(name);
#else
    strmov(name,"UNKNOWN_USER");
#endif
  }
  DBUG_VOID_RETURN;
}

#else /* If MSDOS || VMS */

void read_user_name(char *name)
{
  char *str=getenv("USER");		/* ODBC will send user variable */
  strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
}

#endif

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my_bool handle_local_infile(MYSQL *mysql, const char *net_filename)
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{
  my_bool result= 1;
  uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
  NET *net= &mysql->net;
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  int readcount;
  void *li_ptr;          /* pass state to local_infile functions */
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  char *buf;		/* buffer to be filled by local_infile_read */
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  struct st_mysql_options *options= &mysql->options;
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  DBUG_ENTER("handle_local_infile");

  /* check that we've got valid callback functions */
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  if (!(options->local_infile_init &&
	options->local_infile_read &&
	options->local_infile_end &&
	options->local_infile_error))
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  {
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    /* if any of the functions is invalid, set the default */
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    mysql_set_local_infile_default(mysql);
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  }

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  /* copy filename into local memory and allocate read buffer */
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  if (!(buf=my_malloc(packet_length, MYF(0))))
  {
    strmov(net->sqlstate, unknown_sqlstate);
    strmov(net->last_error, ER(net->last_errno=CR_OUT_OF_MEMORY));
    DBUG_RETURN(1);
  }
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  /* initialize local infile (open file, usually) */
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  if ((*options->local_infile_init)(&li_ptr, net_filename,
    options->local_infile_userdata))
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  {
    my_net_write(net,"",0);		/* Server needs one packet */
    net_flush(net);
    strmov(net->sqlstate, unknown_sqlstate);
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    net->last_errno= (*options->local_infile_error)(li_ptr,
						    net->last_error,
						    sizeof(net->last_error)-1);
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    goto err;
  }

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  /* read blocks of data from local infile callback */
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  while ((readcount =
	  (*options->local_infile_read)(li_ptr, buf,
					packet_length)) > 0)
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  {
    if (my_net_write(net,buf,readcount))
    {
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      DBUG_PRINT("error",
		 ("Lost connection to MySQL server during LOAD DATA of local file"));
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      strmov(net->sqlstate, unknown_sqlstate);
      net->last_errno=CR_SERVER_LOST;
      strmov(net->last_error,ER(net->last_errno));
      goto err;
    }
  }
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  /* Send empty packet to mark end of file */
  if (my_net_write(net,"",0) || net_flush(net))
  {
    strmov(net->sqlstate, unknown_sqlstate);
    net->last_errno=CR_SERVER_LOST;
    sprintf(net->last_error,ER(net->last_errno),errno);
    goto err;
  }
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  if (readcount < 0)
  {
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    net->last_errno= (*options->local_infile_error)(li_ptr,
						    net->last_error,
						    sizeof(net->last_error)-1);
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    goto err;
  }
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  result=0;					/* Ok */

err:
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  /* free up memory allocated with _init, usually */
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  (*options->local_infile_end)(li_ptr);
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  my_free(buf, MYF(0));
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  DBUG_RETURN(result);
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}


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/****************************************************************************
  Default handlers for LOAD LOCAL INFILE
****************************************************************************/

typedef struct st_default_local_infile
{
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  int fd;
  int error_num;
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  const char *filename;
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  char error_msg[LOCAL_INFILE_ERROR_LEN];
} default_local_infile_data;


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/*
  Open file for LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_init()
    ptr			Store pointer to internal data here
    filename		File name to open. This may be in unix format !


  NOTES
    Even if this function returns an error, the load data interface
    guarantees that default_local_infile_end() is called.

  RETURN
    0	ok
    1	error
*/

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static int default_local_infile_init(void **ptr, const char *filename,
             void *userdata __attribute__ ((unused)))
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{
  default_local_infile_data *data;
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  char tmp_name[FN_REFLEN];
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  if (!(*ptr= data= ((default_local_infile_data *)
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		     my_malloc(sizeof(default_local_infile_data),  MYF(0)))))
    return 1; /* out of memory */
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  data->error_msg[0]= 0;
  data->error_num=    0;
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  data->filename= filename;
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  fn_format(tmp_name, filename, "", "", MY_UNPACK_FILENAME);
  if ((data->fd = my_open(tmp_name, O_RDONLY, MYF(0))) < 0)
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  {
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    data->error_num= my_errno;
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    my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
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                EE(EE_FILENOTFOUND), tmp_name, data->error_num);
    return 1;
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  }
  return 0; /* ok */
}


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/*
  Read data for LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_read()
    ptr			Points to handle allocated by _init
    buf			Read data here
    buf_len		Ammount of data to read

  RETURN
    > 0		number of bytes read
    == 0	End of data
    < 0		Error
*/

static int default_local_infile_read(void *ptr, char *buf, uint buf_len)
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{
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  int count;
  default_local_infile_data*data = (default_local_infile_data *) ptr;
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  if ((count= (int) my_read(data->fd, (byte *) buf, buf_len, MYF(0))) < 0)
  {
    data->error_num= EE_READ; /* the errmsg for not entire file read */
    my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
		EE(EE_READ),
		data->filename, my_errno);
  }
  return count;
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}


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/*
  Read data for LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_end()
    ptr			Points to handle allocated by _init
			May be NULL if _init failed!

  RETURN
*/

static void default_local_infile_end(void *ptr)
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{
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  default_local_infile_data *data= (default_local_infile_data *) ptr;
  if (data)					/* If not error on open */
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  {
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    if (data->fd >= 0)
      my_close(data->fd, MYF(MY_WME));
    my_free(ptr, MYF(MY_WME));
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  }
}


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/*
  Return error from LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_end()
    ptr			Points to handle allocated by _init
			May be NULL if _init failed!
    error_msg		Store error text here
    error_msg_len	Max lenght of error_msg

  RETURN
    error message number
*/

static int
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default_local_infile_error(void *ptr, char *error_msg, uint error_msg_len)
{
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  default_local_infile_data *data = (default_local_infile_data *) ptr;
  if (data)					/* If not error on open */
  {
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    strmake(error_msg, data->error_msg, error_msg_len);
    return data->error_num;
  }
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  /* This can only happen if we got error on malloc of handle */
  strmov(error_msg, ER(CR_OUT_OF_MEMORY));
  return CR_OUT_OF_MEMORY;
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}


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void
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mysql_set_local_infile_handler(MYSQL *mysql,
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                               int (*local_infile_init)(void **, const char *,
                               void *),
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                               int (*local_infile_read)(void *, char *, uint),
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                               void (*local_infile_end)(void *),
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                               int (*local_infile_error)(void *, char *, uint),
                               void *userdata)
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{
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  mysql->options.local_infile_init=  local_infile_init;
  mysql->options.local_infile_read=  local_infile_read;
  mysql->options.local_infile_end=   local_infile_end;
  mysql->options.local_infile_error= local_infile_error;
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  mysql->options.local_infile_userdata = userdata;
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}


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void mysql_set_local_infile_default(MYSQL *mysql)
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{
  mysql->options.local_infile_init=  default_local_infile_init;
  mysql->options.local_infile_read=  default_local_infile_read;
  mysql->options.local_infile_end=   default_local_infile_end;
  mysql->options.local_infile_error= default_local_infile_error;
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}


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/**************************************************************************
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  Do a query. If query returned rows, free old rows.
  Read data by mysql_store_result or by repeat call of mysql_fetch_row
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**************************************************************************/

int STDCALL
mysql_query(MYSQL *mysql, const char *query)
{
  return mysql_real_query(mysql,query, (uint) strlen(query));
}

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static MYSQL* spawn_init(MYSQL* parent, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  MYSQL* child;
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  DBUG_ENTER("spawn_init");
  if (!(child= mysql_init(0)))
    DBUG_RETURN(0);

  child->options.user= my_strdup((user) ? user :
				 (parent->user ? parent->user :
				  parent->options.user), MYF(0));
  child->options.password= my_strdup((passwd) ? passwd :
				     (parent->passwd ?
				      parent->passwd :
				      parent->options.password), MYF(0));
  child->options.port= port;
  child->options.host= my_strdup((host) ? host :
				 (parent->host ?
				  parent->host :
				  parent->options.host), MYF(0));
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  if (parent->db)
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    child->options.db= my_strdup(parent->db, MYF(0));
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  else if (parent->options.db)
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    child->options.db= my_strdup(parent->options.db, MYF(0));
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  /*
    rpl_pivot is set to 1 in mysql_init();  Reset it as we are not doing
    replication here
  */
  child->rpl_pivot= 0;
  DBUG_RETURN(child);
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}


int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  if (mysql->master != mysql && !mysql->master->rpl_pivot)
    mysql_close(mysql->master);
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  if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  return 0;
}

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int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
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			unsigned int port,
			const char* user,
			const char* passwd)
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{
  MYSQL* slave;
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  if (!(slave = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  slave->next_slave = mysql->next_slave;
  mysql->next_slave = slave;
  return 0;
}

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/**************************************************************************
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  Return next field of the query results
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**************************************************************************/

MYSQL_FIELD * STDCALL
mysql_fetch_field(MYSQL_RES *result)
{
  if (result->current_field >= result->field_count)
    return(NULL);
  return &result->fields[result->current_field++];
}

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/**************************************************************************
  Get column lengths of the current row
  If one uses mysql_use_result, res->lengths contains the length information,
  else the lengths are calculated from the offset between pointers.
**************************************************************************/

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ulong * STDCALL
mysql_fetch_lengths(MYSQL_RES *res)
{
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  MYSQL_ROW column;
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  if (!(column=res->current_row))
    return 0;					/* Something is wrong */
  if (res->data)
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    (*res->methods->fetch_lengths)(res->lengths, column, res->field_count);
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  return res->lengths;
}

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/**************************************************************************
  Move to a specific row and column
**************************************************************************/

void STDCALL
mysql_data_seek(MYSQL_RES *result, my_ulonglong row)
{
  MYSQL_ROWS	*tmp=0;
  DBUG_PRINT("info",("mysql_data_seek(%ld)",(long) row));
  if (result->data)
    for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
  result->current_row=0;
  result->data_cursor = tmp;
}


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/*************************************************************************
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  put the row or field cursor one a position one got from mysql_row_tell()
  This doesn't restore any data. The next mysql_fetch_row or
  mysql_fetch_field will return the next row or field after the last used
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*************************************************************************/

MYSQL_ROW_OFFSET STDCALL
mysql_row_seek(MYSQL_RES *result, MYSQL_ROW_OFFSET row)
{
  MYSQL_ROW_OFFSET return_value=result->data_cursor;
  result->current_row= 0;
  result->data_cursor= row;
  return return_value;
}


MYSQL_FIELD_OFFSET STDCALL
mysql_field_seek(MYSQL_RES *result, MYSQL_FIELD_OFFSET field_offset)
{
  MYSQL_FIELD_OFFSET return_value=result->current_field;
  result->current_field=field_offset;
  return return_value;
}

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/*****************************************************************************
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  List all databases
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_dbs(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_dbs");

  append_wild(strmov(buff,"show databases"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}


/*****************************************************************************
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  List all tables in a database
  If wild is given then only the tables matching wild is returned
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_tables(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_tables");

  append_wild(strmov(buff,"show tables"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}

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MYSQL_FIELD *cli_list_fields(MYSQL *mysql)
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{
  MYSQL_DATA *query;
  if (!(query= cli_read_rows(mysql,(MYSQL_FIELD*) 0, 
			     protocol_41(mysql) ? 8 : 6)))
    return NULL;

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  mysql->field_count= (uint) query->rows;
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  return unpack_fields(query,&mysql->field_alloc,
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		       mysql->field_count, 1, mysql->server_capabilities);
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}


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/**************************************************************************
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  List all fields in a table
  If wild is given then only the fields matching wild is returned
  Instead of this use query:
  show fields in 'table' like "wild"
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**************************************************************************/

MYSQL_RES * STDCALL
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mysql_list_fields(MYSQL *mysql, const char *table, const char *wild)
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{
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  MYSQL_RES   *result;
  MYSQL_FIELD *fields;
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  char	     buff[257],*end;
  DBUG_ENTER("mysql_list_fields");
  DBUG_PRINT("enter",("table: '%s'  wild: '%s'",table,wild ? wild : ""));

  end=strmake(strmake(buff, table,128)+1,wild ? wild : "",128);
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  free_old_query(mysql);
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  if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
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      !(fields= (*mysql->methods->list_fields)(mysql)))
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    DBUG_RETURN(NULL);

  if (!(result = (MYSQL_RES *) my_malloc(sizeof(MYSQL_RES),
					 MYF(MY_WME | MY_ZEROFILL))))
    DBUG_RETURN(NULL);
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  result->methods= mysql->methods;
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  result->field_alloc=mysql->field_alloc;
  mysql->fields=0;
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  result->field_count = mysql->field_count;
  result->fields= fields;
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  result->eof=1;
  DBUG_RETURN(result);
}

/* List all running processes (threads) in server */

MYSQL_RES * STDCALL
mysql_list_processes(MYSQL *mysql)
{
  MYSQL_DATA *fields;
  uint field_count;
  uchar *pos;
  DBUG_ENTER("mysql_list_processes");

  LINT_INIT(fields);
  if (simple_command(mysql,COM_PROCESS_INFO,0,0,0))
    DBUG_RETURN(0);
  free_old_query(mysql);
  pos=(uchar*) mysql->net.read_pos;
  field_count=(uint) net_field_length(&pos);
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  if (!(fields = (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*) 0,
					      protocol_41(mysql) ? 7 : 5)))
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    DBUG_RETURN(NULL);
  if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
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				    mysql->server_capabilities)))
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    DBUG_RETURN(0);
  mysql->status=MYSQL_STATUS_GET_RESULT;
  mysql->field_count=field_count;
  DBUG_RETURN(mysql_store_result(mysql));
}

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#ifdef USE_OLD_FUNCTIONS
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int  STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_createdb");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
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}


int  STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_drop_db");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
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}
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#endif
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int STDCALL
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mysql_shutdown(MYSQL *mysql, enum mysql_enum_shutdown_level shutdown_level)
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{
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  uchar level[1];
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  DBUG_ENTER("mysql_shutdown");
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  level[0]= (uchar) shutdown_level;
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  DBUG_RETURN(simple_command(mysql, COM_SHUTDOWN, (char *)level, 1, 0));
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}


int STDCALL
mysql_refresh(MYSQL *mysql,uint options)
{
  uchar bits[1];
  DBUG_ENTER("mysql_refresh");
  bits[0]= (uchar) options;
  DBUG_RETURN(simple_command(mysql,COM_REFRESH,(char*) bits,1,0));
}

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int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
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  char buff[4];
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  DBUG_ENTER("mysql_kill");
  int4store(buff,pid);
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  DBUG_RETURN(simple_command(mysql,COM_PROCESS_KILL,buff,sizeof(buff),0));
}


int STDCALL
mysql_set_server_option(MYSQL *mysql, enum enum_mysql_set_option option)
{
  char buff[2];
  DBUG_ENTER("mysql_set_server_option");
  int2store(buff, (uint) option);
  DBUG_RETURN(simple_command(mysql, COM_SET_OPTION, buff, sizeof(buff), 0));
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}


int STDCALL
mysql_dump_debug_info(MYSQL *mysql)
{
  DBUG_ENTER("mysql_dump_debug_info");
  DBUG_RETURN(simple_command(mysql,COM_DEBUG,0,0,0));
}

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const char *cli_read_statistics(MYSQL *mysql)
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{
  mysql->net.read_pos[mysql->packet_length]=0;	/* End of stat string */
  if (!mysql->net.read_pos[0])
  {
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    strmov(mysql->net.sqlstate, unknown_sqlstate);
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    mysql->net.last_errno=CR_WRONG_HOST_INFO;
    strmov(mysql->net.last_error, ER(mysql->net.last_errno));
    return mysql->net.last_error;
  }
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  return (char*) mysql->net.read_pos;
}

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const char * STDCALL
mysql_stat(MYSQL *mysql)
{
  DBUG_ENTER("mysql_stat");
  if (simple_command(mysql,COM_STATISTICS,0,0,0))
    return mysql->net.last_error;
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  DBUG_RETURN((*mysql->methods->read_statistics)(mysql));
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}


int STDCALL
mysql_ping(MYSQL *mysql)
{
  DBUG_ENTER("mysql_ping");
  DBUG_RETURN(simple_command(mysql,COM_PING,0,0,0));
}


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const char * STDCALL
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mysql_get_server_info(MYSQL *mysql)
{
  return((char*) mysql->server_version);
}


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/*
  Get version number for server in a form easy to test on

  SYNOPSIS
    mysql_get_server_version()
    mysql		Connection

  EXAMPLE
    4.1.0-alfa ->  40100
  
  NOTES
    We will ensure that a newer server always has a bigger number.

  RETURN
   Signed number > 323000
*/

ulong STDCALL
mysql_get_server_version(MYSQL *mysql)
{
  uint major, minor, version;
  char *pos= mysql->server_version, *end_pos;
  major=   (uint) strtoul(pos, &end_pos, 10);	pos=end_pos+1;
  minor=   (uint) strtoul(pos, &end_pos, 10);	pos=end_pos+1;
  version= (uint) strtoul(pos, &end_pos, 10);
  return (ulong) major*10000L+(ulong) (minor*100+version);
}


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const char * STDCALL
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mysql_get_host_info(MYSQL *mysql)
{
  return(mysql->host_info);
}


uint STDCALL
mysql_get_proto_info(MYSQL *mysql)
{
  return (mysql->protocol_version);
}

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const char * STDCALL
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mysql_get_client_info(void)
{
  return (char*) MYSQL_SERVER_VERSION;
}

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ulong STDCALL mysql_get_client_version(void)
{
  return MYSQL_VERSION_ID;
}

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my_bool STDCALL mysql_eof(MYSQL_RES *res)
{
  return res->eof;
}

MYSQL_FIELD * STDCALL mysql_fetch_field_direct(MYSQL_RES *res,uint fieldnr)
{
  return &(res)->fields[fieldnr];
}

MYSQL_FIELD * STDCALL mysql_fetch_fields(MYSQL_RES *res)
{
  return (res)->fields;
}

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MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
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{
  return res->data_cursor;
}

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MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
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{
  return (res)->current_field;
}

/* MYSQL */

unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
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  return mysql->last_used_con->field_count;
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}

my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
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  return mysql->last_used_con->affected_rows;
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}

my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
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  return mysql->last_used_con->insert_id;
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}

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const char *STDCALL mysql_sqlstate(MYSQL *mysql)
{
  return mysql->net.sqlstate;
}

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uint STDCALL mysql_warning_count(MYSQL *mysql)
{
  return mysql->warning_count;
}

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const char *STDCALL mysql_info(MYSQL *mysql)
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{
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  return mysql->info;
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}

ulong STDCALL mysql_thread_id(MYSQL *mysql)
{
  return (mysql)->thread_id;
}

const char * STDCALL mysql_character_set_name(MYSQL *mysql)
{
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  return mysql->charset->csname;
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}


uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
  return 1;
#else
  return 0;
#endif
}

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my_bool STDCALL mysql_embedded(void)
{
#ifdef EMBEDDED_LIBRARY
  return 1;
#else
  return 0;
#endif
}

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/****************************************************************************
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  Some support functions
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****************************************************************************/

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/*
  Functions called my my_net_init() to set some application specific variables
*/

void my_net_local_init(NET *net)
{
  net->max_packet=   (uint) net_buffer_length;
  net->read_timeout= (uint) net_read_timeout;
  net->write_timeout=(uint) net_write_timeout;
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  net->retry_count=  1;
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  net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}

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/*
  This function is used to create HEX string that you
  can use in a SQL statement in of the either ways:
    INSERT INTO blob_column VALUES (0xAABBCC);  (any MySQL version)
    INSERT INTO blob_column VALUES (X'AABBCC'); (4.1 and higher)
  
  The string in "from" is encoded to a HEX string.
  The result is placed in "to" and a terminating null byte is appended.
  
  The string pointed to by "from" must be "length" bytes long.
  You must allocate the "to" buffer to be at least length*2+1 bytes long.
  Each character needs two bytes, and you need room for the terminating
  null byte. When mysql_hex_string() returns, the contents of "to" will
  be a null-terminated string. The return value is the length of the
  encoded string, not including the terminating null character.

  The return value does not contain any leading 0x or a leading X' and
  trailing '. The caller must supply whichever of those is desired.
*/

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ulong STDCALL
mysql_hex_string(char *to, const char *from, ulong length)
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{
  char *to0= to;
  const char *end;
            
  for (end= from + length; from < end; from++)
  {
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    *to++= _dig_vec_upper[((unsigned char) *from) >> 4];
    *to++= _dig_vec_upper[((unsigned char) *from) & 0x0F];
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  }
  *to= '\0';
  return (ulong) (to-to0);
}

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/*
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  Add escape characters to a string (blob?) to make it suitable for a insert
  to should at least have place for length*2+1 chars
  Returns the length of the to string
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*/

ulong STDCALL
mysql_escape_string(char *to,const char *from,ulong length)
{
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  return escape_string_for_mysql(default_charset_info, to, from, length);
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}

ulong STDCALL
mysql_real_escape_string(MYSQL *mysql, char *to,const char *from,
			 ulong length)
{
1599
  return escape_string_for_mysql(mysql->charset, to, from, length);
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}


char * STDCALL
mysql_odbc_escape_string(MYSQL *mysql,
			 char *to, ulong to_length,
			 const char *from, ulong from_length,
			 void *param,
			 char * (*extend_buffer)
			 (void *, char *, ulong *))
{
  char *to_end=to+to_length-5;
  const char *end;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
#endif

  for (end=from+from_length; from != end ; from++)
  {
    if (to >= to_end)
    {
      to_length = (ulong) (end-from)+512;	/* We want this much more */
      if (!(to=(*extend_buffer)(param, to, &to_length)))
	return to;
      to_end=to+to_length-5;
    }
#ifdef USE_MB
    {
      int l;
      if (use_mb_flag && (l = my_ismbchar(mysql->charset, from, end)))
      {
	while (l--)
	  *to++ = *from++;
	from--;
	continue;
      }
    }
#endif
    switch (*from) {
    case 0:				/* Must be escaped for 'mysql' */
      *to++= '\\';
      *to++= '0';
      break;
    case '\n':				/* Must be escaped for logs */
      *to++= '\\';
      *to++= 'n';
      break;
    case '\r':
      *to++= '\\';
      *to++= 'r';
      break;
    case '\\':
      *to++= '\\';
      *to++= '\\';
      break;
    case '\'':
      *to++= '\\';
      *to++= '\'';
      break;
    case '"':				/* Better safe than sorry */
      *to++= '\\';
      *to++= '"';
      break;
    case '\032':			/* This gives problems on Win32 */
      *to++= '\\';
      *to++= 'Z';
      break;
    default:
      *to++= *from;
    }
  }
  return to;
}

void STDCALL
myodbc_remove_escape(MYSQL *mysql,char *name)
{
  char *to;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
  char *end;
  LINT_INIT(end);
  if (use_mb_flag)
    for (end=name; *end ; end++) ;
#endif

  for (to=name ; *name ; name++)
  {
#ifdef USE_MB
    int l;
    if (use_mb_flag && (l = my_ismbchar( mysql->charset, name , end ) ) )
    {
      while (l--)
	*to++ = *name++;
      name--;
      continue;
    }
#endif
    if (*name == '\\' && name[1])
      name++;
    *to++= *name;
  }
  *to=0;
}
1704 1705

/********************************************************************
1706
 Implementation of new client API for 4.1 version.
1707

1708
 mysql_stmt_* are real prototypes used by applications.
1709

1710 1711 1712 1713 1714
 To make API work in embedded library all functions performing
 real I/O are prefixed with 'cli_' (abbreviated from 'Call Level
 Interface'). This functions are invoked via pointers set in
 MYSQL::methods structure. Embedded counterparts, prefixed with
 'emb_' reside in libmysqld/lib_sql.cc.
1715 1716
*********************************************************************/

1717
/******************* Declarations ***********************************/
1718

1719

1720
/*
1721 1722 1723 1724 1725
  These functions are called by function pointer MYSQL_STMT::read_row_func.
  Each function corresponds to one of the read methods:
  - mysql_stmt_fetch without prior mysql_stmt_store_result,
  - mysql_stmt_fetch when result is stored,
  - mysql_stmt_fetch when there are no rows (always returns MYSQL_NO_DATA)
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*/

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static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row);
static int stmt_read_row_buffered(MYSQL_STMT *stmt, unsigned char **row);
static int stmt_read_row_no_data(MYSQL_STMT *stmt, unsigned char **row);
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/*
  This function is used in mysql_stmt_store_result if
  STMT_ATTR_UPDATE_MAX_LENGTH attribute is set.
*/
static void stmt_update_metadata(MYSQL_STMT *stmt, MYSQL_ROWS *data);
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/*
  Maximum sizes of MYSQL_TYPE_DATE, MYSQL_TYPE_TIME, MYSQL_TYPE_DATETIME
  values stored in network buffer.
*/

/* 1 (length) + 2 (year) + 1 (month) + 1 (day) */
1744
#define MAX_DATE_REP_LENGTH 5
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/*
  1 (length) + 1 (is negative) + 4 (day count) + 1 (hour)
  + 1 (minute) + 1 (seconds) + 4 (microseconds)
*/
1750
#define MAX_TIME_REP_LENGTH 13
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/*
  1 (length) + 2 (year) + 1 (month) + 1 (day) +
  1 (hour) + 1 (minute) + 1 (second) + 4 (microseconds)
*/
1756
#define MAX_DATETIME_REP_LENGTH 12
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1758
#define MAX_DOUBLE_STRING_REP_LENGTH 331
1759

1760
/**************** Misc utility functions ****************************/
1761 1762

/*
1763
  Reallocate the NET package to have at least length bytes available.
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  SYNPOSIS
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    my_realloc_str()
    net                 The NET structure to modify.
    length              Ensure that net->buff has space for at least
                        this number of bytes.
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  RETURN VALUES
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    0   Success.
    1   Error, i.e. out of memory or requested packet size is bigger
        than max_allowed_packet. The error code is stored in net->last_errno.
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*/

1777
static my_bool my_realloc_str(NET *net, ulong length)
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{
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  ulong buf_length= (ulong) (net->write_pos - net->buff);
  my_bool res=0;
  DBUG_ENTER("my_realloc_str");
  if (buf_length + length > net->max_packet)
1783
  {
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    res= net_realloc(net, buf_length + length);
    net->write_pos= net->buff+ buf_length;
1786
  }
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  DBUG_RETURN(res);
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}


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/* Clear possible error statee of struct NET */

static void net_clear_error(NET *net)
{
  if (net->last_errno)
  {
    net->last_errno= 0;
    net->last_error[0]= '\0';
    strmov(net->sqlstate, not_error_sqlstate);
  }
}

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/*
  Set statement error code, sqlstate, and error message
  from given errcode and sqlstate.
*/

static void set_stmt_error(MYSQL_STMT * stmt, int errcode,
                           const char *sqlstate)
{
  DBUG_ENTER("set_stmt_error");
  DBUG_PRINT("enter", ("error: %d '%s'", errcode, ER(errcode)));
  DBUG_ASSERT(stmt != 0);

  stmt->last_errno= errcode;
  strmov(stmt->last_error, ER(errcode));
  strmov(stmt->sqlstate, sqlstate);

  DBUG_VOID_RETURN;
}


/*
  Set statement error code, sqlstate, and error message.
*/

void set_stmt_errmsg(MYSQL_STMT * stmt, const char *err, int errcode,
                     const char *sqlstate)
{
  DBUG_ENTER("set_stmt_errmsg");
  DBUG_PRINT("enter", ("error: %d/%s '%s'", errcode, sqlstate, err));
  DBUG_ASSERT(stmt != 0);

  stmt->last_errno= errcode;
  if (err && err[0])
    strmov(stmt->last_error, err);
  strmov(stmt->sqlstate, sqlstate);

  DBUG_VOID_RETURN;
}
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1842
/*
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  Read and unpack server reply to COM_PREPARE command (sent from
  mysql_stmt_prepare).
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  SYNOPSIS
    cli_read_prepare_result()
    mysql   connection handle
    stmt    statement handle
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  RETURN VALUES
    0	ok
    1	error
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*/

1856
my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
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{
  uchar *pos;
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  uint field_count, param_count;
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  MYSQL_DATA *fields_data;
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  DBUG_ENTER("read_prepare_result");
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  mysql= mysql->last_used_con;
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  if (net_safe_read(mysql) == packet_error)
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    DBUG_RETURN(1);
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  pos= (uchar*) mysql->net.read_pos;
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  stmt->stmt_id= uint4korr(pos+1); pos+= 5;
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  /* Number of columns in result set */
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  field_count=   uint2korr(pos);   pos+= 2;
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  /* Number of placeholders in the statement */
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  param_count=   uint2korr(pos);   pos+= 2;
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  if (param_count != 0)
  {
    MYSQL_DATA *param_data;

    /* skip parameters data: we don't support it yet */
    if (!(param_data= (*mysql->methods->read_rows)(mysql, (MYSQL_FIELD*)0, 7)))
      DBUG_RETURN(1);
    free_rows(param_data);
  }

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  if (field_count != 0)
  {
    if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
      mysql->server_status|= SERVER_STATUS_IN_TRANS;
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    mysql->extra_info= net_field_length_ll(&pos);
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    if (!(fields_data= (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*)0,7)))
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      DBUG_RETURN(1);
    if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root,
				      field_count,0,
				      mysql->server_capabilities)))
      DBUG_RETURN(1);
  }
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  stmt->field_count=  (uint) field_count;
  stmt->param_count=  (ulong) param_count;
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  mysql->warning_count= 0;
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  DBUG_RETURN(0);
}


/*
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  Allocate memory and init prepared statement structure.

1908 1909
  SYNOPSIS
    mysql_stmt_init()
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    mysql   connection handle

  DESCRIPTION
    This is an entry point of the new API. Returned handle stands for
    a server-side prepared statement. Memory for this structure (~700
    bytes) is allocated using 'malloc'. Once created, the handle can be
    reused many times. Created statement handle is bound to connection
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    handle provided to this call: its lifetime is limited by lifetime
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    of connection.
    'mysql_stmt_init()' is a pure local call, server side structure is
    created only in mysql_stmt_prepare.
    Next steps you may want to make:
    - set a statement attribute (mysql_stmt_attr_set()),
    - prepare statement handle with a query (mysql_stmt_prepare()),
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    - close statement handle and free its memory (mysql_stmt_close()),
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    - reset statement with mysql_stmt_reset() (a no-op which will
      just return).
    Behaviour of the rest of API calls on this statement is not defined yet
    (though we're working on making each wrong call sequence return
    error).
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  RETURN VALUE
    statement structure upon success and NULL if out of
    memory
*/

MYSQL_STMT * STDCALL
mysql_stmt_init(MYSQL *mysql)
{
  MYSQL_STMT *stmt;
  DBUG_ENTER("mysql_stmt_init");

  if (!(stmt= (MYSQL_STMT *) my_malloc(sizeof(MYSQL_STMT),
                                       MYF(MY_WME | MY_ZEROFILL))))
  {
    set_mysql_error(mysql, CR_OUT_OF_MEMORY, unknown_sqlstate);
    DBUG_RETURN(0);
  }

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  init_alloc_root(&stmt->mem_root, 2048, 2048);
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  init_alloc_root(&stmt->result.alloc, 4096, 4096);
  stmt->result.alloc.min_malloc= sizeof(MYSQL_ROWS);
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  mysql->stmts= list_add(mysql->stmts, &stmt->list);
  stmt->list.data= stmt;
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  stmt->state= MYSQL_STMT_INIT_DONE;
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  stmt->mysql= mysql;
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  stmt->read_row_func= stmt_read_row_no_data;
  /* The rest of statement members was bzeroed inside malloc */
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  DBUG_RETURN(stmt);
}

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/*
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  Prepare server side statement with query.

1966 1967
  SYNOPSIS
    mysql_stmt_prepare()
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    stmt    statement handle
    query   statement to prepare
    length  statement length
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  DESCRIPTION
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    Associate statement with statement handle. This is done both on
    client and server sides. At this point the server parses given query
    and creates an internal structure to represent it.
    Next steps you may want to make:
    - find out if this statement returns a result set by
      calling mysql_stmt_field_count(), and get result set metadata
      with mysql_stmt_result_metadata(),
    - if query contains placeholders, bind input parameters to placeholders
      using mysql_stmt_bind_param(),
    - otherwise proceed directly to mysql_stmt_execute().

  IMPLEMENTATION NOTES
  - if this is a re-prepare of the statement, first close previous data
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    structure on the server and free old statement data
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  - then send the query to server and get back number of placeholders,
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    number of columns in result set (if any), and result set metadata.
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    At the same time allocate memory for input and output parameters
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    to have less checks in mysql_stmt_bind_{param, result}.
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  RETURN VALUES
    0  success
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   !0  error
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*/

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int STDCALL
mysql_stmt_prepare(MYSQL_STMT *stmt, const char *query, ulong length)
1999
{
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  MYSQL *mysql= stmt->mysql;
  DBUG_ENTER("mysql_stmt_prepare");

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  if (!mysql)
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  {
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    /* mysql can be reset in mysql_close called from mysql_reconnect */
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
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  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    /* This is second prepare with another statement */
2013
    char buff[MYSQL_STMT_HEADER];               /* 4 bytes - stmt id */
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    mysql_stmt_free_result(stmt);
    /*
2017
      These members must be reset for API to
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      function in case of error or misuse.
    */
    stmt->bind_param_done= stmt->bind_result_done= FALSE;
    stmt->param_count= stmt->field_count= 0;
    stmt->last_errno= 0;
    stmt->last_error[0]= '\0';
    free_root(&stmt->mem_root, MYF(MY_KEEP_PREALLOC));

    int4store(buff, stmt->stmt_id);
    /*
      If there was a 'use' result from another statement, or from
      mysql_use_result it won't be freed in mysql_stmt_free_result and
      we should get 'Commands out of sync' here.
    */
    if (simple_command(mysql, COM_CLOSE_STMT, buff, 4, 1))
    {
      set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                      mysql->net.sqlstate);
      DBUG_RETURN(1);
    }
    stmt->state= MYSQL_STMT_INIT_DONE;
  }

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  if (simple_command(mysql, COM_PREPARE, query, length, 1))
  {
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    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
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  }

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  if ((*mysql->methods->read_prepare_result)(mysql, stmt))
2049 2050 2051
  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
2052
    DBUG_RETURN(1);
2053
  }
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2055
  /*
2056
    alloc_root will return valid address even in case when param_count
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    and field_count are zero. Thus we should never rely on stmt->bind
    or stmt->params when checking for existence of placeholders or
    result set.
  */
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  if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
						sizeof(MYSQL_BIND)*
2063
                                                (stmt->param_count +
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                                                 stmt->field_count))))
  {
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2067
    DBUG_RETURN(1);
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  }
  stmt->bind= stmt->params + stmt->param_count;
2070
  stmt->state= MYSQL_STMT_PREPARE_DONE;
2071
  DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
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  DBUG_RETURN(0);
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}

2075
/*
2076 2077 2078 2079
  Get result set metadata from reply to mysql_stmt_execute.
  This is used mainly for SHOW commands, as metadata for these
  commands is sent only with result set.
  To be removed when all commands will fully support prepared mode.
2080 2081
*/

2082
static unsigned int alloc_stmt_fields(MYSQL_STMT *stmt)
2083
{
2084 2085
  MYSQL_FIELD *fields, *field, *end;
  MEM_ROOT *alloc= &stmt->mem_root;
2086
  MYSQL *mysql= stmt->mysql->last_used_con;
2087

2088
  stmt->field_count= mysql->field_count;
2089

2090
  /*
2091
    Get the field information for non-select statements
2092 2093
    like SHOW and DESCRIBE commands
  */
2094
  if (!(stmt->fields= (MYSQL_FIELD *) alloc_root(alloc,
2095
						 sizeof(MYSQL_FIELD) *
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						 stmt->field_count)) ||
      !(stmt->bind= (MYSQL_BIND *) alloc_root(alloc,
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					      sizeof(MYSQL_BIND) *
					      stmt->field_count)))
2100
    return 0;
2101 2102

  for (fields= mysql->fields, end= fields+stmt->field_count,
2103
	 field= stmt->fields;
2104 2105 2106 2107 2108 2109 2110
       field && fields < end; fields++, field++)
  {
    field->db       = strdup_root(alloc,fields->db);
    field->table    = strdup_root(alloc,fields->table);
    field->org_table= strdup_root(alloc,fields->org_table);
    field->name     = strdup_root(alloc,fields->name);
    field->org_name = strdup_root(alloc,fields->org_name);
2111
    field->charsetnr= fields->charsetnr;
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    field->length   = fields->length;
    field->type     = fields->type;
    field->flags    = fields->flags;
    field->decimals = fields->decimals;
    field->def      = fields->def ? strdup_root(alloc,fields->def): 0;
    field->max_length= 0;
  }
2119 2120
  return stmt->field_count;
}
2121

2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145

/*
  Update result set columns metadata if it was sent again in
  reply to COM_EXECUTE.
*/

static void update_stmt_fields(MYSQL_STMT *stmt)
{
  MYSQL_FIELD *field= stmt->mysql->fields;
  MYSQL_FIELD *field_end= field + stmt->field_count;
  MYSQL_FIELD *stmt_field= stmt->fields;

  DBUG_ASSERT(stmt->field_count == stmt->mysql->field_count);

  for (; field < field_end; ++field, ++stmt_field)
  {
    stmt_field->charsetnr= field->charsetnr;
    stmt_field->length   = field->length;
    stmt_field->type     = field->type;
    stmt_field->flags    = field->flags;
    stmt_field->decimals = field->decimals;
  }
}

2146
/*
2147 2148 2149 2150 2151 2152 2153 2154 2155
  Returns prepared statement metadata in the form of a result set.

  SYNOPSIS
    mysql_stmt_result_metadata()
    stmt  statement handle

  DESCRIPTION
    This function should be used after mysql_stmt_execute().
    You can safely check that prepared statement has a result set by calling
2156
    mysql_stmt_field_count(): if number of fields is not zero, you can call
2157 2158 2159 2160
    this function to get fields metadata.
    Next steps you may want to make:
    - find out number of columns in result set by calling
      mysql_num_fields(res) (the same value is returned by
2161
      mysql_stmt_field_count())
2162 2163 2164 2165
    - fetch metadata for any column with mysql_fetch_field,
      mysql_fetch_field_direct, mysql_fetch_fields, mysql_field_seek.
    - free returned MYSQL_RES structure with mysql_free_result.
    - proceed to binding of output parameters.
2166 2167 2168 2169 2170 2171

  RETURN
    NULL  statement contains no result set or out of memory.
          In the latter case you can retreive error message
          with mysql_stmt_error.
    MYSQL_RES  a result set with no rows
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*/

MYSQL_RES * STDCALL
2175
mysql_stmt_result_metadata(MYSQL_STMT *stmt)
2176 2177
{
  MYSQL_RES *result;
2178
  DBUG_ENTER("mysql_stmt_result_metadata");
2179

2180 2181 2182 2183 2184 2185 2186 2187 2188
  /*
    stmt->fields is only defined if stmt->field_count is not null;
    stmt->field_count is initialized in prepare.
  */
  if (!stmt->field_count)
     DBUG_RETURN(0);

  if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result),
                                      MYF(MY_WME | MY_ZEROFILL))))
2189
  {
2190 2191 2192
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
    DBUG_RETURN(0);
  }
2193

2194 2195
  result->methods=	stmt->mysql->methods;
  result->eof=		1;                      /* Marker for buffered */
2196 2197
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
2198
  /* The rest of members of 'result' was bzeroed inside malloc */
2199
  DBUG_RETURN(result);
2200 2201
}

2202

2203
/*
2204 2205
  Returns parameter columns meta information in the form of
  result set.
2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218

  SYNOPSYS
    mysql_stmt_param_metadata()
    stmt    statement handle

  DESCRIPTION
    This function can be called after you prepared the statement handle
    with mysql_stmt_prepare().
    XXX: not implemented yet.

  RETURN
    MYSQL_RES on success, 0 if there is no metadata.
    Currently this function always returns 0.
2219 2220 2221
*/

MYSQL_RES * STDCALL
2222
mysql_stmt_param_metadata(MYSQL_STMT *stmt)
2223
{
2224
  DBUG_ENTER("mysql_stmt_param_metadata");
2225

2226 2227 2228 2229
  if (!stmt->param_count)
    DBUG_RETURN(0);

  /*
2230 2231
    TODO: Fix this when server sends the information.
    Till then keep a dummy prototype.
2232 2233 2234 2235 2236
  */
  DBUG_RETURN(0); 
}


2237 2238 2239 2240 2241 2242 2243 2244 2245 2246
/* Store type of parameter in network buffer. */

static void store_param_type(char **pos, MYSQL_BIND *param)
{
  uint typecode= param->buffer_type | (param->is_unsigned ? 32768 : 0);
  int2store(*pos, typecode);
  *pos+= 2;
}


2247 2248
/*
  Functions to store parameter data in network packet.
2249

2250 2251 2252 2253 2254
  SYNOPSIS
    store_param_xxx()
    net			MySQL NET connection
    param		MySQL bind param

2255
  DESCRIPTION
2256 2257 2258 2259 2260
    These funtions are invoked from mysql_stmt_execute() by
    MYSQL_BIND::store_param_func pointer. This pointer is set once per
    many executions in mysql_stmt_bind_param(). The caller must ensure
    that network buffer have enough capacity to store parameter
    (MYSQL_BIND::buffer_length contains needed number of bytes).
2261
*/
2262 2263 2264

static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
2265
  *(net->write_pos++)= *(uchar *) param->buffer;
2266 2267
}

2268 2269 2270 2271 2272 2273
static void store_param_short(NET *net, MYSQL_BIND *param)
{
  short value= *(short*) param->buffer;
  int2store(net->write_pos,value);
  net->write_pos+=2;
}
2274

2275
static void store_param_int32(NET *net, MYSQL_BIND *param)
2276
{
2277 2278 2279 2280
  int32 value= *(int32*) param->buffer;
  int4store(net->write_pos,value);
  net->write_pos+=4;
}
2281

2282 2283 2284 2285 2286 2287
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
  longlong value= *(longlong*) param->buffer;
  int8store(net->write_pos,value);
  net->write_pos+= 8;
}
2288

2289 2290 2291 2292 2293
static void store_param_float(NET *net, MYSQL_BIND *param)
{
  float value= *(float*) param->buffer;
  float4store(net->write_pos, value);
  net->write_pos+= 4;
2294 2295
}

2296 2297 2298 2299 2300 2301
static void store_param_double(NET *net, MYSQL_BIND *param)
{
  double value= *(double*) param->buffer;
  float8store(net->write_pos, value);
  net->write_pos+= 8;
}
2302

2303 2304 2305
static void store_param_time(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
2306
  char buff[MAX_TIME_REP_LENGTH], *pos;
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316
  uint length;

  pos= buff+1;
  pos[0]= tm->neg ? 1: 0;
  int4store(pos+1, tm->day);
  pos[5]= (uchar) tm->hour;
  pos[6]= (uchar) tm->minute;
  pos[7]= (uchar) tm->second;
  int4store(pos+8, tm->second_part);
  if (tm->second_part)
2317
    length= 12;
2318 2319 2320 2321
  else if (tm->hour || tm->minute || tm->second || tm->day)
    length= 8;
  else
    length= 0;
2322
  buff[0]= (char) length++;
2323 2324 2325 2326 2327 2328
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void net_store_datetime(NET *net, MYSQL_TIME *tm)
{
2329
  char buff[MAX_DATETIME_REP_LENGTH], *pos;
2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348
  uint length;

  pos= buff+1;

  int2store(pos, tm->year);
  pos[2]= (uchar) tm->month;
  pos[3]= (uchar) tm->day;
  pos[4]= (uchar) tm->hour;
  pos[5]= (uchar) tm->minute;
  pos[6]= (uchar) tm->second;
  int4store(pos+7, tm->second_part);
  if (tm->second_part)
    length= 11;
  else if (tm->hour || tm->minute || tm->second)
    length= 7;
  else if (tm->year || tm->month || tm->day)
    length= 4;
  else
    length= 0;
2349
  buff[0]= (char) length++;
2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void store_param_date(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  net_store_datetime(net, tm);
}

static void store_param_datetime(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  net_store_datetime(net, tm);
}
2367

2368
static void store_param_str(NET *net, MYSQL_BIND *param)
2369
{
2370 2371
  /* param->length is always set in mysql_stmt_bind_param */
  ulong length= *param->length;
2372 2373
  char *to= (char *) net_store_length((char *) net->write_pos, length);
  memcpy(to, param->buffer, length);
2374
  net->write_pos= (uchar*) to+length;
2375 2376
}

2377

2378
/*
2379 2380 2381 2382 2383 2384 2385 2386 2387
  Mark if the parameter is NULL.

  SYNOPSIS
    store_param_null()
    net			MySQL NET connection
    param		MySQL bind param

  DESCRIPTION
    A data package starts with a string of bits where we set a bit
2388 2389
    if a parameter is NULL. Unlike bit string in result set row, here
    we don't have reserved bits for OK/error packet.
2390 2391
*/

2392
static void store_param_null(NET *net, MYSQL_BIND *param)
2393
{
2394
  uint pos= param->param_number;
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2395
  net->buff[pos/8]|=  (uchar) (1 << (pos & 7));
2396
}
2397 2398 2399


/*
2400 2401 2402
  Store one parameter in network packet: data is read from
  client buffer and saved in network packet by means of one
  of store_param_xxxx functions.
2403 2404
*/

2405
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
2406
{
2407
  NET *net= &stmt->mysql->net;
2408
  DBUG_ENTER("store_param");
2409 2410 2411 2412 2413 2414
  DBUG_PRINT("enter",("type: %d, buffer:%lx, length: %lu  is_null: %d",
		      param->buffer_type,
		      param->buffer ? param->buffer : "0", *param->length,
		      *param->is_null));

  if (*param->is_null)
2415 2416
    store_param_null(net, param);
  else
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2417
  {
2418 2419
    /*
      Param->length should ALWAYS point to the correct length for the type
2420
      Either to the length pointer given by the user or param->buffer_length
2421
    */
2422
    if ((my_realloc_str(net, *param->length)))
2423
    {
2424
      set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
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2425
      DBUG_RETURN(1);
2426
    }
2427
    (*param->store_param_func)(net, param);
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2428 2429
  }
  DBUG_RETURN(0);
2430 2431
}

2432

2433
/*
2434 2435
  Auxilary function to send COM_EXECUTE packet to server and read reply.
  Used from cli_stmt_execute, which is in turn used by mysql_stmt_execute.
2436 2437
*/

2438
static my_bool execute(MYSQL_STMT *stmt, char *packet, ulong length)
2439
{
2440 2441
  MYSQL *mysql= stmt->mysql;
  NET	*net= &mysql->net;
2442
  char buff[4 /* size of stmt id */ +
2443
            5 /* execution flags */];
2444
  DBUG_ENTER("execute");
2445 2446
  DBUG_PRINT("enter",("packet: %s, length :%d",packet ? packet :" ", length));

2447 2448
  mysql->last_used_con= mysql;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
2449 2450 2451 2452
  buff[4]= (char) 0;                            /* no flags */
  int4store(buff+5, 1);                         /* iteration count */
  if (cli_advanced_command(mysql, COM_EXECUTE, buff, sizeof(buff),
                           packet, length, 1) ||
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2453
      (*mysql->methods->read_query_result)(mysql))
2454
  {
2455
    set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
2456
    DBUG_RETURN(1);
2457
  }
2458
  stmt->affected_rows= mysql->affected_rows;
2459
  stmt->insert_id= mysql->insert_id;
2460 2461 2462
  DBUG_RETURN(0);
}

2463 2464

int cli_stmt_execute(MYSQL_STMT *stmt)
2465
{
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2466
  DBUG_ENTER("cli_stmt_execute");
2467 2468 2469

  if (stmt->param_count)
  {
2470 2471
    NET        *net= &stmt->mysql->net;
    MYSQL_BIND *param, *param_end;
2472
    char       *param_data;
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2473 2474 2475
    ulong length;
    uint null_count;
    my_bool    result;
2476

2477 2478 2479 2480 2481
    if (!stmt->bind_param_done)
    {
      set_stmt_error(stmt, CR_PARAMS_NOT_BOUND, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2482 2483 2484 2485 2486
    if (stmt->mysql->status != MYSQL_STATUS_READY)
    {
      set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2487

2488 2489 2490
    net_clear(net);				/* Sets net->write_pos */
    /* Reserve place for null-marker bytes */
    null_count= (stmt->param_count+7) /8;
2491 2492 2493 2494 2495
    if (my_realloc_str(net, null_count + 1))
    {
      set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2496 2497 2498 2499 2500
    bzero((char*) net->write_pos, null_count);
    net->write_pos+= null_count;
    param_end= stmt->params + stmt->param_count;

    /* In case if buffers (type) altered, indicate to server */
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2501 2502
    *(net->write_pos)++= (uchar) stmt->send_types_to_server;
    if (stmt->send_types_to_server)
2503
    {
2504 2505 2506 2507 2508
      if (my_realloc_str(net, 2 * stmt->param_count))
      {
        set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
        DBUG_RETURN(1);
      }
2509 2510 2511 2512 2513
      /*
	Store types of parameters in first in first package
	that is sent to the server.
      */
      for (param= stmt->params;	param < param_end ; param++)
2514
        store_param_type((char**) &net->write_pos, param);
2515 2516 2517
    }

    for (param= stmt->params; param < param_end; param++)
2518
    {
2519
      /* check if mysql_stmt_send_long_data() was used */
2520 2521
      if (param->long_data_used)
	param->long_data_used= 0;	/* Clear for next execute call */
2522
      else if (store_param(stmt, param))
2523
	DBUG_RETURN(1);
2524
    }
2525 2526
    length= (ulong) (net->write_pos - net->buff);
    /* TODO: Look into avoding the following memdup */
2527
    if (!(param_data= my_memdup((const char*) net->buff, length, MYF(0))))
2528
    {
2529
      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2530
      DBUG_RETURN(1);
2531
    }
2532
    result= execute(stmt, param_data, length);
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2533
    stmt->send_types_to_server=0;
2534
    my_free(param_data, MYF(MY_WME));
2535 2536 2537
    DBUG_RETURN(result);
  }
  DBUG_RETURN((int) execute(stmt,0,0));
2538 2539
}

2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553
/*
  Read one row from buffered result set.  Result set is created by prior
  call to mysql_stmt_store_result().
  SYNOPSIS
    stmt_read_row_buffered()

  RETURN VALUE
    0             - success; *row is set to valid row pointer (row data
                    is stored in result set buffer)
    MYSQL_NO_DATA - end of result set. *row is set to NULL
*/

static int stmt_read_row_buffered(MYSQL_STMT *stmt, unsigned char **row)
{
2554
  if (stmt->data_cursor)
2555
  {
2556 2557
    *row= (uchar *) stmt->data_cursor->data;
    stmt->data_cursor= stmt->data_cursor->next;
2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577
    return 0;
  }
  *row= 0;
  return MYSQL_NO_DATA;
}

/*
  Read one row from network: unbuffered non-cursor fetch.
  If last row was read, or error occured, erase this statement
  from record pointing to object unbuffered fetch is performed from.

  SYNOPSIS
    stmt_read_row_unbuffered()
    stmt  statement handle
    row   pointer to write pointer to row data;

  RETURN VALUE
    0           - success; *row contains valid address of a row;
                  row data is stored in network buffer
    1           - error; error code is written to
2578
                  stmt->last_{errno,error}; *row is not changed
2579
  MYSQL_NO_DATA - end of file was read from network;
2580
                  *row is set to NULL
2581 2582 2583 2584 2585 2586
*/

static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row)
{
  int rc= 1;
  MYSQL *mysql= stmt->mysql;
2587
  /*
2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598
    This function won't be called if stmt->field_count is zero
    or execution wasn't done: this is ensured by mysql_stmt_execute.
  */
  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
    return 1;
  }
  if (mysql->status != MYSQL_STATUS_GET_RESULT)
  {
    set_stmt_error(stmt, stmt->unbuffered_fetch_cancelled ?
2599
                   CR_FETCH_CANCELED : CR_COMMANDS_OUT_OF_SYNC,
2600 2601 2602 2603 2604 2605 2606
                   unknown_sqlstate);
    goto error;
  }
  if ((*mysql->methods->unbuffered_fetch)(mysql, (char**) row))
  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
2607 2608 2609 2610 2611 2612 2613
    /*
      If there was an error, there are no more pending rows:
      reset statement status to not hang up in following
      mysql_stmt_close (it will try to flush result set before
      closing the statement).
    */
    mysql->status= MYSQL_STATUS_READY;
2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645
    goto error;
  }
  if (!*row)
  {
    mysql->status= MYSQL_STATUS_READY;
    rc= MYSQL_NO_DATA;
    goto error;
  }
  return 0;
error:
  if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
    mysql->unbuffered_fetch_owner= 0;
  return rc;
}

/*
  Default read row function to not SIGSEGV in client in
  case of wrong sequence of API calls.
*/

static int
stmt_read_row_no_data(MYSQL_STMT *stmt  __attribute__((unused)),
                      unsigned char **row  __attribute__((unused)))
{
  if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
  {
    set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
    return 1;
  }
  return MYSQL_NO_DATA;
}

2646 2647 2648 2649 2650 2651 2652 2653

/*
  Get/set statement attributes

  SYNOPSIS
    mysql_stmt_attr_get()
    mysql_stmt_attr_set()

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2654
    attr_type  statement attribute
2655 2656 2657 2658 2659 2660
    value      casted to const void * pointer to value.

  RETURN VALUE
    0 success
   !0 wrong attribute type
*/
2661

2662 2663 2664 2665 2666 2667 2668 2669
my_bool STDCALL mysql_stmt_attr_set(MYSQL_STMT *stmt,
                                    enum enum_stmt_attr_type attr_type,
                                    const void *value)
{
  switch (attr_type) {
  case STMT_ATTR_UPDATE_MAX_LENGTH:
    stmt->update_max_length= value ? *(const my_bool*) value : 0;
    break;
2670
  default:
2671 2672 2673 2674 2675 2676
    return TRUE;
  }
  return FALSE;
}


2677
my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
2678 2679 2680 2681 2682 2683
                                    enum enum_stmt_attr_type attr_type,
                                    void *value)
{
  switch (attr_type) {
  case STMT_ATTR_UPDATE_MAX_LENGTH:
    *(unsigned long *) value= stmt->update_max_length;
2684
    break;
2685
  default:
2686 2687 2688 2689 2690 2691
    return TRUE;
  }
  return FALSE;
}


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2692
/*
2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733
  Send placeholders data to server (if there are placeholders)
  and execute prepared statement.

  SYNOPSIS
    mysql_stmt_execute()
    stmt  statement handle. The handle must be created
          with mysql_stmt_init() and prepared with
          mysql_stmt_prepare(). If there are placeholders
          in the statement they must be bound to local
          variables with mysql_stmt_bind_param().

  DESCRIPTION
    This function will automatically flush pending result
    set (if there is one), send parameters data to the server
    and read result of statement execution.
    If previous result set was cached with mysql_stmt_store_result()
    it will also be freed in the beginning of this call.
    The server can return 3 types of responses to this command:
    - error, can be retrieved with mysql_stmt_error()
    - ok, no result set pending. In this case we just update
      stmt->insert_id and stmt->affected_rows.
    - the query returns a result set: there could be 0 .. N
    rows in it. In this case the server can also send updated
    result set metadata.

    Next steps you may want to make:
    - find out if there is result set with mysql_stmt_field_count().
    If there is one:
    - optionally, cache entire result set on client to unblock
    connection with mysql_stmt_store_result()
    - bind client variables to result set columns and start read rows
    with mysql_stmt_fetch().
    - reset statement with mysql_stmt_reset() or close it with
    mysql_stmt_close()
    Otherwise:
    - find out last insert id and number of affected rows with
    mysql_stmt_insert_id(), mysql_stmt_affected_rows()

  RETURN
    0   success
    1   error, message can be retrieved with mysql_stmt_error().
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2734 2735
*/

2736
int STDCALL mysql_stmt_execute(MYSQL_STMT *stmt)
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2737
{
2738
  MYSQL *mysql= stmt->mysql;
2739
  DBUG_ENTER("mysql_stmt_execute");
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2740

2741 2742 2743
  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
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2744
    DBUG_RETURN(1);
2745 2746 2747 2748 2749
  }

  mysql_stmt_free_result(stmt);
  /*
    No need to check for stmt->state: if the statement wasn't
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2750
    prepared we'll get 'unknown statement handler' error from server.
2751 2752 2753
  */
  if (mysql->methods->stmt_execute(stmt))
    DBUG_RETURN(1);
2754
  if (mysql->field_count)
2755
  {
2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777
    /* Server has sent result set metadata */
    if (stmt->field_count == 0)
    {
      /*
        This is 'SHOW'/'EXPLAIN'-like query. Current implementation of
        prepared statements can't send result set metadata for these queries
        on prepare stage. Read it now.
      */
      alloc_stmt_fields(stmt);
    }
    else
    {
      /*
        Update result set metadata if it for some reason changed between
        prepare and execute, i.e.:
        - in case of 'SELECT ?' we don't know column type unless data was
          supplied to mysql_stmt_execute, so updated column type is sent
          now.
        - if data dictionary changed between prepare and execute, for
          example a table used in the query was altered.
        Note, that now (4.1.3) we always send metadata in reply to
        COM_EXECUTE (even if it is not necessary), so either this or
2778
        previous branch always works.
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        TODO: send metadata only when it's really necessary and add a warning
        'Metadata changed' when it's sent twice.
      */
      update_stmt_fields(stmt);
    }
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  }
  stmt->state= MYSQL_STMT_EXECUTE_DONE;
  if (stmt->field_count)
  {
    stmt->mysql->unbuffered_fetch_owner= &stmt->unbuffered_fetch_cancelled;
    stmt->unbuffered_fetch_cancelled= FALSE;
    stmt->read_row_func= stmt_read_row_unbuffered;
  }
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  DBUG_RETURN(0);
}

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/*
  Return total parameters count in the statement
*/

2800
ulong STDCALL mysql_stmt_param_count(MYSQL_STMT * stmt)
2801
{
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  DBUG_ENTER("mysql_stmt_param_count");
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  DBUG_RETURN(stmt->param_count);
}

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/*
  Return total affected rows from the last statement
*/

my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
{
2812
  return stmt->affected_rows;
2813
}
2814

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/*
  Returns the number of result columns for the most recent query
  run on this statement.
*/

unsigned int STDCALL mysql_stmt_field_count(MYSQL_STMT *stmt)
{
  return stmt->field_count;
}

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/*
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  Return last inserted id for auto_increment columns.

  SYNOPSIS
    mysql_stmt_insert_id()
    stmt    statement handle

  DESCRIPTION
    Current implementation of this call has a caveat: stmt->insert_id is
    unconditionally updated from mysql->insert_id in the end of each
    mysql_stmt_execute(). This works OK if mysql->insert_id contains new
    value (sent in reply to mysql_stmt_execute()), otherwise stmt->insert_id
    value gets undefined, as it's updated from some arbitrary value saved in
    connection structure during some other call.
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*/

my_ulonglong STDCALL mysql_stmt_insert_id(MYSQL_STMT *stmt)
{
  return stmt->insert_id;
}

2847

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static my_bool int_is_null_true= 1;		/* Used for MYSQL_TYPE_NULL */
static my_bool int_is_null_false= 0;

2851

2852
/*
2853
  Set up input data buffers for a statement.
2854 2855 2856 2857 2858 2859

  SYNOPSIS
    mysql_stmt_bind_param()
    stmt    statement handle
            The statement must be prepared with mysql_stmt_prepare().
    bind    Array of mysql_stmt_param_count() bind parameters.
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            This function doesn't check that size of this argument
            is >= mysql_stmt_field_count(): it's user's responsibility.

  DESCRIPTION
    Use this call after mysql_stmt_prepare() to bind user variables to
    placeholders.
    Each element of bind array stands for a placeholder. Placeholders
    are counted from 0.  For example statement
    'INSERT INTO t (a, b) VALUES (?, ?)'
    contains two placeholders, and for such statement you should supply
    bind array of two elements (MYSQL_BIND bind[2]).

    By properly initializing bind array you can bind virtually any
    C language type to statement's placeholders:
    First, it's strongly recommended to always zero-initialize entire
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    bind structure before setting its members. This will both shorten
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    your application code and make it robust to future extensions of
    MYSQL_BIND structure.
2878
    Then you need to assign typecode of your application buffer to
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    MYSQL_BIND::buffer_type. The following typecodes with their
    correspondence to C language types are supported:
    MYSQL_TYPE_TINY       for 8-bit integer variables. Normally it's
                          'signed char' and 'unsigned char';
    MYSQL_TYPE_SHORT      for 16-bit signed and unsigned variables. This
                          is usually 'short' and 'unsigned short';
    MYSQL_TYPE_LONG       for 32-bit signed and unsigned variables. It
                          corresponds to 'int' and 'unsigned int' on
                          vast majority of platforms. On IA-32 and some
                          other 32-bit systems you can also use 'long'
                          here;
    MYSQL_TYPE_LONGLONG   64-bit signed or unsigned integer.  Stands for
                          '[unsigned] long long' on most platforms;
    MYSQL_TYPE_FLOAT      32-bit floating point type, 'float' on most
                          systems;
    MYSQL_TYPE_DOUBLE     64-bit floating point type, 'double' on most
                          systems;
    MYSQL_TYPE_TIME       broken-down time stored in MYSQL_TIME
                          structure
    MYSQL_TYPE_DATE       date stored in MYSQL_TIME structure
    MYSQL_TYPE_DATETIME   datetime stored in MYSQL_TIME structure See
                          more on how to use these types for sending
                          dates and times below;
    MYSQL_TYPE_STRING     character string, assumed to be in
                          character-set-client. If character set of
                          client is not equal to character set of
                          column, value for this placeholder will be
                          converted to destination character set before
                          insert.
    MYSQL_TYPE_BLOB       sequence of bytes. This sequence is assumed to
                          be in binary character set (which is the same
                          as no particular character set), and is never
                          converted to any other character set. See also
                          notes about supplying string/blob length
                          below.
    MYSQL_TYPE_NULL       special typecode for binding nulls.
    These C/C++ types are not supported yet by the API: long double,
    bool.

    As you can see from the list above, it's responsibility of
    application programmer to ensure that chosen typecode properly
    corresponds to host language type. For example on all platforms
    where we build MySQL packages (as of MySQL 4.1.4) int is a 32-bit
    type. So for int you can always assume that proper typecode is
    MYSQL_TYPE_LONG (however queer it sounds, the name is legacy of the
    old MySQL API). In contrary sizeof(long) can be 4 or 8 8-bit bytes,
    depending on platform.

    TODO: provide client typedefs for each integer and floating point
    typecode, i. e. int8, uint8, float32, etc.

    Once typecode was set, it's necessary to assign MYSQL_BIND::buffer
    to point to the buffer of given type. Finally, additional actions
    may be taken for some types or use cases:

      Binding integer types.
    For integer types you might also need to set MYSQL_BIND::is_unsigned
    member. Set it to TRUE when binding unsigned char, unsigned short,
    unsigned int, unsigned long, unsigned long long.

      Binding floating point types.
    For floating point types you just need to set
    MYSQL_BIND::buffer_type and MYSQL_BIND::buffer. The rest of the
    members should be zero-initialized.

      Binding NULLs.
    You might have a column always NULL, never NULL, or sometimes NULL.
    For an always NULL column set MYSQL_BIND::buffer_type to
    MYSQL_TYPE_NULL.  The rest of the members just need to be
    zero-initialized.  For never NULL columns set MYSQL_BIND::is_null to
    0, or this has already been done if you zero-initialized the entire
    structure.  If you set MYSQL_TYPE::is_null to point to an
    application buffer of type 'my_bool', then this buffer will be
    checked on each execution: this way you can set the buffer to TRUE,
    or any non-0 value for NULLs, and to FALSE or 0 for not NULL data.

      Binding text strings and sequences of bytes.
    For strings, in addition to MYSQL_BIND::buffer_type and
    MYSQL_BIND::buffer you need to set MYSQL_BIND::length or
    MYSQL_BIND::buffer_length.
    If 'length' is set, 'buffer_length' is ignored. 'buffer_length'
    member should be used when size of string doesn't change between
    executions. If you want to vary buffer length for each value, set
    'length' to point to an application buffer of type 'unsigned long'
    and set this long to length of the string before each
    mysql_stmt_execute().

      Binding dates and times.
    For binding dates and times prepared statements API provides clients
    with MYSQL_TIME structure. A pointer to instance of this structure
    should be assigned to MYSQL_BIND::buffer whenever MYSQL_TYPE_TIME,
    MYSQL_TYPE_DATE, MYSQL_TYPE_DATETIME typecodes are used.  When
    typecode is MYSQL_TYPE_TIME, only members 'hour', 'minute', 'second'
    and 'neg' (is time offset negative) are used. These members only
    will be sent to the server.
    MYSQL_TYPE_DATE implies use of 'year', 'month', 'day', 'neg'.
    MYSQL_TYPE_DATETIME utilizes both parts of MYSQL_TIME structure.
    You don't have to set MYSQL_TIME::time_type member: it's not used
    when sending data to the server, typecode information is enough.
    'second_part' member can hold microsecond precision of time value,
    but now it's only supported on protocol level: you can't store
    microsecond in a column, or use in temporal calculations. However,
    if you send a time value with microsecond part for 'SELECT ?',
    statement, you'll get it back unchanged from the server.

      Data conversion.
    If conversion from host language type to data representation,
    corresponding to SQL type, is required it's done on the server.
    Data truncation is possible when conversion is lossy. For example,
    if you supply MYSQL_TYPE_DATETIME value out of valid SQL type
    TIMESTAMP range, the same conversion will be applied as if this
    value would have been sent as string in the old protocol.
    TODO: document how the server will behave in case of truncation/data
    loss.

    After variables were bound, you can repeatedly set/change their
    values and mysql_stmt_execute() the statement.

    See also: mysql_stmt_send_long_data() for sending long text/blob
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    data in pieces, examples in tests/mysql_client_test.c.
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    Next steps you might want to make:
    - execute statement with mysql_stmt_execute(),
    - reset statement using mysql_stmt_reset() or reprepare it with
      another query using mysql_stmt_prepare()
    - close statement with mysql_stmt_close().

  IMPLEMENTATION
    The function copies given bind array to internal storage of the
    statement, and sets up typecode-specific handlers to perform
    serialization of bound data. This means that although you don't need
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    to call this routine after each assignment to bind buffers, you
    need to call it each time you change parameter typecodes, or other
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    members of MYSQL_BIND array.
    This is a pure local call. Data types of client buffers are sent
    along with buffers' data at first execution of the statement.
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  RETURN
    0  success
    1  error, can be retrieved with mysql_stmt_error.
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*/

3020
my_bool STDCALL mysql_stmt_bind_param(MYSQL_STMT *stmt, MYSQL_BIND *bind)
3021
{
3022 3023
  uint count=0;
  MYSQL_BIND *param, *end;
3024
  DBUG_ENTER("mysql_stmt_bind_param");
3025

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  if (!stmt->param_count)
  {
    if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
    {
      set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
      DBUG_RETURN(1);
    }
    DBUG_RETURN(0);
  }

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  /* Allocated on prepare */
  memcpy((char*) stmt->params, (char*) bind,
	 sizeof(MYSQL_BIND) * stmt->param_count);

  for (param= stmt->params, end= param+stmt->param_count;
       param < end ;
       param++)
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  {
3044
    param->param_number= count++;
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    param->long_data_used= 0;

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    /* If param->is_null is not set, then the value can never be NULL */
    if (!param->is_null)
      param->is_null= &int_is_null_false;

3051 3052
    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
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    case MYSQL_TYPE_NULL:
3054
      param->is_null= &int_is_null_true;
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      break;
3056
    case MYSQL_TYPE_TINY:
3057
      /* Force param->length as this is fixed for this type */
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      param->length= &param->buffer_length;
      param->buffer_length= 1;
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      param->store_param_func= store_param_tinyint;
      break;
    case MYSQL_TYPE_SHORT:
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      param->length= &param->buffer_length;
      param->buffer_length= 2;
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      param->store_param_func= store_param_short;
      break;
    case MYSQL_TYPE_LONG:
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      param->length= &param->buffer_length;
      param->buffer_length= 4;
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      param->store_param_func= store_param_int32;
      break;
    case MYSQL_TYPE_LONGLONG:
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      param->length= &param->buffer_length;
      param->buffer_length= 8;
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      param->store_param_func= store_param_int64;
      break;
    case MYSQL_TYPE_FLOAT:
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      param->length= &param->buffer_length;
      param->buffer_length= 4;
3080 3081 3082
      param->store_param_func= store_param_float;
      break;
    case MYSQL_TYPE_DOUBLE:
3083 3084
      param->length= &param->buffer_length;
      param->buffer_length= 8;
3085 3086
      param->store_param_func= store_param_double;
      break;
3087 3088
    case MYSQL_TYPE_TIME:
      param->store_param_func= store_param_time;
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      param->buffer_length= MAX_TIME_REP_LENGTH;
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      break;
    case MYSQL_TYPE_DATE:
      param->store_param_func= store_param_date;
3093
      param->buffer_length= MAX_DATE_REP_LENGTH;
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      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->store_param_func= store_param_datetime;
3098
      param->buffer_length= MAX_DATETIME_REP_LENGTH;
3099
      break;
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    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
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    case MYSQL_TYPE_BLOB:
3104 3105 3106
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
      param->store_param_func= store_param_str;
3107
      /*
3108 3109
        For variable length types user must set either length or
        buffer_length.
3110
      */
3111 3112
      break;
    default:
3113
      strmov(stmt->sqlstate, unknown_sqlstate);
3114 3115
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
3116
	      param->buffer_type, count);
3117
      DBUG_RETURN(1);
3118
    }
3119 3120 3121 3122 3123 3124
    /*
      If param->length is not given, change it to point to buffer_length.
      This way we can always use *param->length to get the length of data
    */
    if (!param->length)
      param->length= &param->buffer_length;
3125
  }
3126
  /* We have to send/resend type information to MySQL */
3127 3128
  stmt->send_types_to_server= TRUE;
  stmt->bind_param_done= TRUE;
3129 3130 3131
  DBUG_RETURN(0);
}

3132

3133 3134 3135 3136 3137
/********************************************************************
 Long data implementation
*********************************************************************/

/*
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  Send long data in pieces to the server

  SYNOPSIS
3141
    mysql_stmt_send_long_data()
3142 3143 3144 3145
    stmt			Statement handler
    param_number		Parameter number (0 - N-1)
    data			Data to send to server
    length			Length of data to send (may be 0)
3146

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  DESCRIPTION
    This call can be used repeatedly to send long data in pieces
    for any string/binary placeholder. Data supplied for
    a placeholder is saved at server side till execute, and then
    used instead of value from MYSQL_BIND object. More precisely,
    if long data for a parameter was supplied, MYSQL_BIND object
    corresponding to this parameter is not sent to server. In the
    end of execution long data states of placeholders are reset,
    so next time values of such placeholders will be taken again
    from MYSQL_BIND array.
    The server does not reply to this call: if there was an error
    in data handling (which now only can happen if server run out
    of memory) it would be returned in reply to
    mysql_stmt_execute().
    You should choose type of long data carefully if you care
    about character set conversions performed by server when the
    statement is executed.  No conversion is performed at all for
    MYSQL_TYPE_BLOB and other binary typecodes. For
    MYSQL_TYPE_STRING and the rest of text placeholders data is
    converted from client character set to character set of
    connection. If these character sets are different, this
    conversion may require additional memory at server, equal to
    total size of supplied pieces.

3171
  RETURN VALUES
3172 3173
    0	ok
    1	error
3174 3175
*/

3176
my_bool STDCALL
3177
mysql_stmt_send_long_data(MYSQL_STMT *stmt, uint param_number,
3178
		     const char *data, ulong length)
3179 3180
{
  MYSQL_BIND *param;
3181
  DBUG_ENTER("mysql_stmt_send_long_data");
3182
  DBUG_ASSERT(stmt != 0);
3183
  DBUG_PRINT("enter",("param no : %d, data : %lx, length : %ld",
3184
		      param_number, data, length));
3185

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  /*
    We only need to check for stmt->param_count, if it's not null
    prepare was done.
  */
  if (param_number >= stmt->param_count)
  {
    set_stmt_error(stmt, CR_INVALID_PARAMETER_NO, unknown_sqlstate);
    DBUG_RETURN(1);
  }
3195

3196
  param= stmt->params+param_number;
3197 3198 3199
  if (param->buffer_type < MYSQL_TYPE_TINY_BLOB ||
      param->buffer_type > MYSQL_TYPE_STRING)
  {
3200
    /* Long data handling should be used only for string/binary types */
3201
    strmov(stmt->sqlstate, unknown_sqlstate);
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    sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
	    param->param_number);
    DBUG_RETURN(1);
  }
3206

3207
  /*
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    Send long data packet if there is data or we're sending long data
    for the first time.
  */
3211
  if (length || param->long_data_used == 0)
3212
  {
3213
    MYSQL *mysql= stmt->mysql;
3214
    /* Packet header: stmt id (4 bytes), param no (2 bytes) */
3215 3216
    char buff[MYSQL_LONG_DATA_HEADER];

3217 3218
    int4store(buff, stmt->stmt_id);
    int2store(buff + 4, param_number);
3219 3220
    param->long_data_used= 1;

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    /*
      Note that we don't get any ok packet from the server in this case
      This is intentional to save bandwidth.
    */
3225 3226
    if ((*mysql->methods->advanced_command)(mysql, COM_LONG_DATA, buff,
					    sizeof(buff), data, length, 1))
3227
    {
3228 3229
      set_stmt_errmsg(stmt, mysql->net.last_error,
		      mysql->net.last_errno, mysql->net.sqlstate);
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      DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(0);
}

3236

3237
/********************************************************************
3238
 Fetch and conversion of result set rows (binary protocol).
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*********************************************************************/

3241 3242 3243 3244 3245 3246 3247 3248
/*
  Read date, (time, datetime) value from network buffer and store it
  in MYSQL_TIME structure.

  SYNOPSIS
    read_binary_{date,time,datetime}()
    tm    MYSQL_TIME structure to fill
    pos   pointer to current position in network buffer.
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          These functions increase pos to point to the beginning of the
          next column.
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  Auxiliary functions to read time (date, datetime) values from network
  buffer and store in MYSQL_TIME structure. Jointly used by conversion
  and no-conversion fetching.
*/

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static void read_binary_time(MYSQL_TIME *tm, uchar **pos)
3258
{
3259
  /* net_field_length will set pos to the first byte of data */
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  uint length= net_field_length(pos);

  if (length)
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  {
    uchar *to= *pos;
    tm->neg= (bool) to[0];
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    tm->day=    (ulong) sint4korr(to+1);
    tm->hour=   (uint) to[5];
    tm->minute= (uint) to[6];
    tm->second= (uint) to[7];
    tm->second_part= (length > 8) ? (ulong) sint4korr(to+8) : 0;
    tm->year= tm->month= 0;
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    if (tm->day)
    {
      /* Convert days to hours at once */
      tm->hour+= tm->day*24;
      tm->day= 0;
    }
3279 3280
    tm->time_type= MYSQL_TIMESTAMP_TIME;

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    *pos+= length;
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  }
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  else
3284
    set_zero_time(tm, MYSQL_TIMESTAMP_TIME);
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}

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static void read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
3288
{
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  uint length= net_field_length(pos);
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  if (length)
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  {
    uchar *to= *pos;
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    tm->neg=    0;
    tm->year=   (uint) sint2korr(to);
    tm->month=  (uint) to[2];
    tm->day=    (uint) to[3];
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    if (length > 4)
    {
      tm->hour=   (uint) to[4];
      tm->minute= (uint) to[5];
      tm->second= (uint) to[6];
    }
    else
      tm->hour= tm->minute= tm->second= 0;
    tm->second_part= (length > 7) ? (ulong) sint4korr(to+7) : 0;
3309
    tm->time_type= MYSQL_TIMESTAMP_DATETIME;
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    *pos+= length;
3312
  }
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  else
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    set_zero_time(tm, MYSQL_TIMESTAMP_DATETIME);
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}

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static void read_binary_date(MYSQL_TIME *tm, uchar **pos)
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{
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  uint length= net_field_length(pos);
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  if (length)
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  {
    uchar *to= *pos;
    tm->year =  (uint) sint2korr(to);
    tm->month=  (uint) to[2];
    tm->day= (uint) to[3];
3327

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3328 3329 3330
    tm->hour= tm->minute= tm->second= 0;
    tm->second_part= 0;
    tm->neg= 0;
3331
    tm->time_type= MYSQL_TIMESTAMP_DATE;
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3332 3333

    *pos+= length;
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3334
  }
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3335
  else
3336
    set_zero_time(tm, MYSQL_TIMESTAMP_DATE);
3337 3338
}

3339

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/*
  Convert string to supplied buffer of any type.

  SYNOPSIS
    fetch_string_with_conversion()
    param   output buffer descriptor
    value   column data
    length  data length
*/
3349

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3350 3351
static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
                                         uint length)
3352
{
3353
  char *buffer= (char *)param->buffer;
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3354
  int err= 0;
3355

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3356 3357 3358 3359 3360
  /*
    This function should support all target buffer types: the rest
    of conversion functions can delegate conversion to it.
  */
  switch(param->buffer_type) {
3361 3362
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3363
  case MYSQL_TYPE_TINY:
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3364 3365 3366 3367
  {
    uchar data= (uchar) my_strntol(&my_charset_latin1, value, length, 10,
                                   NULL, &err);
    *buffer= data;
3368
    break;
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3369
  }
3370
  case MYSQL_TYPE_SHORT:
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3371 3372 3373 3374
  {
    short data= (short) my_strntol(&my_charset_latin1, value, length, 10,
                                   NULL, &err);
    shortstore(buffer, data);
3375
    break;
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3376
  }
3377
  case MYSQL_TYPE_LONG:
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3378 3379 3380 3381
  {
    int32 data= (int32)my_strntol(&my_charset_latin1, value, length, 10,
                                  NULL, &err);
    longstore(buffer, data);
3382
    break;
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konstantin@mysql.com committed
3383
  }
3384
  case MYSQL_TYPE_LONGLONG:
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3385 3386 3387 3388
  {
    longlong data= my_strntoll(&my_charset_latin1, value, length, 10,
                               NULL, &err);
    longlongstore(buffer, data);
3389
    break;
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3390
  }
3391
  case MYSQL_TYPE_FLOAT:
3392
  {
3393
    char *end_not_used;
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konstantin@mysql.com committed
3394
    float data = (float) my_strntod(&my_charset_latin1, value, length,
3395
                                    &end_not_used, &err);
3396
    floatstore(buffer, data);
3397 3398
    break;
  }
3399
  case MYSQL_TYPE_DOUBLE:
3400
  {
3401 3402 3403
    char *end_not_used;
    double data= my_strntod(&my_charset_latin1, value, length, &end_not_used,
                            &err);
3404
    doublestore(buffer, data);
3405 3406
    break;
  }
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  case MYSQL_TYPE_TIME:
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
    str_to_time(value, length, tm, &err);
    break;
  }
  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_DATETIME:
3415
  case MYSQL_TYPE_TIMESTAMP:
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3416 3417 3418 3419 3420 3421 3422 3423 3424
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
    str_to_datetime(value, length, tm, 0, &err);
    break;
  }
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
3425
  default:
3426
  {
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3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440
    /*
      Copy column data to the buffer taking into account offset,
      data length and buffer length.
    */
    char *start= value + param->offset;
    char *end= value + length;
    ulong copy_length;
    if (start < end)
    {
      copy_length= end - start;
      /* We've got some data beyond offset: copy up to buffer_length bytes */
      if (param->buffer_length)
        memcpy(buffer, start, min(copy_length, param->buffer_length));
    }
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3441
    else
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      copy_length= 0;
    if (copy_length < param->buffer_length)
      buffer[copy_length]= '\0';
    /*
      param->length will always contain length of entire column;
      number of copied bytes may be way different:
    */
3449
    *param->length= length;
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3450
    break;
3451
  }
3452
  }
3453 3454
}

3455

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3456 3457 3458 3459 3460 3461 3462 3463 3464
/*
  Convert integer value to client buffer of any type.

  SYNOPSIS
    fetch_long_with_conversion()
    param   output buffer descriptor
    field   column metadata
    value   column data
*/
3465

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3466 3467
static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                       longlong value)
3468
{
3469
  char *buffer= (char *)param->buffer;
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3470
  uint field_is_unsigned= field->flags & UNSIGNED_FLAG;
3471

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3472
  switch (param->buffer_type) {
3473 3474
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3475
  case MYSQL_TYPE_TINY:
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3476
    *(uchar *)param->buffer= (uchar) value;
3477 3478
    break;
  case MYSQL_TYPE_SHORT:
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konstantin@mysql.com committed
3479
    shortstore(buffer, value);
3480 3481
    break;
  case MYSQL_TYPE_LONG:
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konstantin@mysql.com committed
3482
    longstore(buffer, value);
3483 3484
    break;
  case MYSQL_TYPE_LONGLONG:
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konstantin@mysql.com committed
3485
    longlongstore(buffer, value);
3486 3487
    break;
  case MYSQL_TYPE_FLOAT:
3488
  {
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3489 3490
    float data= field_is_unsigned ? (float) ulonglong2double(value) :
                                    (float) value;
3491
    floatstore(buffer, data);
3492 3493
    break;
  }
3494
  case MYSQL_TYPE_DOUBLE:
3495
  {
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3496 3497 3498
    double data= field_is_unsigned ? ulonglong2double(value) :
                                     (double) value;
    doublestore(buffer, data);
3499 3500
    break;
  }
3501
  default:
3502
  {
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3503 3504 3505
    char buff[22];                              /* Enough for longlong */
    char *end= longlong10_to_str(value, buff, field_is_unsigned ? 10: -10);
    /* Resort to string conversion which supports all typecodes */
3506 3507 3508 3509 3510 3511 3512 3513 3514 3515
    uint length= (uint) (end-buff);

    if (field->flags & ZEROFILL_FLAG && length < field->length &&
        field->length < 21)
    {
      bmove_upp((char*) buff+field->length,buff+length, length);
      bfill((char*) buff, field->length - length,'0');
      length= field->length;
    }
    fetch_string_with_conversion(param, buff, length);
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3516
    break;
3517
  }
3518
  }
3519 3520
}

3521

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3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532
/*
  Convert double/float column to supplied buffer of any type.

  SYNOPSIS
    fetch_float_with_conversion()
    param   output buffer descriptor
    field   column metadata
    value   column data
    width   default number of significant digits used when converting
            float/double to string
*/
3533

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3534 3535
static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                        double value, int width)
3536
{
3537
  char *buffer= (char *)param->buffer;
3538

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3539
  switch (param->buffer_type) {
3540 3541
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3542
  case MYSQL_TYPE_TINY:
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konstantin@mysql.com committed
3543
    *buffer= (uchar)value;
3544 3545
    break;
  case MYSQL_TYPE_SHORT:
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konstantin@mysql.com committed
3546
    shortstore(buffer, (short)value);
3547 3548
    break;
  case MYSQL_TYPE_LONG:
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konstantin@mysql.com committed
3549
    longstore(buffer, (long)value);
3550 3551 3552
    break;
  case MYSQL_TYPE_LONGLONG:
  {
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3553 3554
    longlong val= (longlong) value;
    longlongstore(buffer, val);
3555 3556 3557 3558
    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
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3559
    float data= (float) value;
3560
    floatstore(buffer, data);
3561 3562 3563 3564
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
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konstantin@mysql.com committed
3565
    doublestore(buffer, value);
3566 3567
    break;
  }
3568
  default:
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konstantin@mysql.com committed
3569 3570 3571 3572 3573 3574
  {
    /*
      Resort to fetch_string_with_conversion: this should handle
      floating point -> string conversion nicely, honor all typecodes
      and param->offset possibly set in mysql_stmt_fetch_column
    */
3575
    char buff[MAX_DOUBLE_STRING_REP_LENGTH];
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konstantin@mysql.com committed
3576 3577 3578
    char *end;
    /* TODO: move this to a header shared between client and server. */
#define NOT_FIXED_DEC  31
3579
    if (field->decimals >= NOT_FIXED_DEC)
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konstantin@mysql.com committed
3580 3581
#undef NOT_FIXED_DEC
    {
3582 3583 3584 3585 3586 3587 3588 3589
      /*
        The 14 below is to ensure that the server and client has the same
        precisions. This will ensure that on the same machine you get the
        same value as a string independent of the protocol you use.
      */
      sprintf(buff, "%-*.*g", (int) min(sizeof(buff)-1,
                                        param->buffer_length),
	      min(14,width), value);
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3590 3591 3592
      end= strcend(buff, ' ');
      *end= 0;
    }
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monty@mashka.mysql.fi committed
3593
    else
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konstantin@mysql.com committed
3594
    {
kent@mysql.com's avatar
kent@mysql.com committed
3595
      sprintf(buff, "%.*f", (int) field->decimals, value);
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konstantin@mysql.com committed
3596 3597
      end= strend(buff);
    }
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3598
    fetch_string_with_conversion(param, buff, (uint) (end - buff));
kent@mysql.com's avatar
kent@mysql.com committed
3599
    break;
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konstantin@mysql.com committed
3600
  }
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monty@mashka.mysql.fi committed
3601
  }
3602 3603
}

3604

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3605 3606 3607 3608 3609 3610 3611 3612 3613 3614
/*
  Fetch time/date/datetime to supplied buffer of any type

  SYNOPSIS
    param   output buffer descriptor
    time    column data
*/

static void fetch_datetime_with_conversion(MYSQL_BIND *param,
                                           MYSQL_TIME *time)
3615 3616
{
  switch (param->buffer_type) {
3617 3618
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3619 3620 3621 3622
  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_TIME:
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
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konstantin@mysql.com committed
3623 3624
    /* XXX: should we copy only relevant members here? */
    *(MYSQL_TIME *)(param->buffer)= *time;
3625
    break;
3626 3627
  default:
  {
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konstantin@mysql.com committed
3628 3629 3630 3631
    /*
      Convert time value  to string and delegate the rest to
      fetch_string_with_conversion:
    */
3632 3633
    char buff[MAX_DATE_STRING_REP_LENGTH];
    uint length= my_TIME_to_str(time, buff);
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konstantin@mysql.com committed
3634 3635 3636
    /* Resort to string conversion */
    fetch_string_with_conversion(param, (char *)buff, length);
    break;
3637 3638 3639
  }
  }
}
3640

3641

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3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656
/*
  Fetch and convert result set column to output buffer.

  SYNOPSIS
    fetch_result_with_conversion()
    param   output buffer descriptor
    field   column metadata
    row     points to a column of result set tuple in binary format

  DESCRIPTION
    This is a fallback implementation of column fetch used
    if column and output buffer types do not match.
    Increases tuple pointer to point at the next column within the
    tuple.
*/
3657

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3658 3659
static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                         uchar **row)
3660
{
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monty@mashka.mysql.fi committed
3661
  enum enum_field_types field_type= field->type;
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konstantin@mysql.com committed
3662
  uint field_is_unsigned= field->flags & UNSIGNED_FLAG;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3663

3664 3665 3666
  switch (field_type) {
  case MYSQL_TYPE_TINY:
  {
3667 3668 3669 3670
    uchar value= **row;
    /* sic: we need to cast to 'signed char' as 'char' may be unsigned */
    longlong data= field_is_unsigned ? (longlong) value :
                                       (longlong) (signed char) value;
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konstantin@mysql.com committed
3671
    fetch_long_with_conversion(param, field, data);
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3672
    *row+= 1;
3673 3674 3675 3676 3677
    break;
  }
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
  {
3678
    short value= sint2korr(*row);
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konstantin@mysql.com committed
3679 3680
    longlong data= field_is_unsigned ? (longlong) (unsigned short) value :
                                       (longlong) value;
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konstantin@mysql.com committed
3681
    fetch_long_with_conversion(param, field, data);
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konstantin@mysql.com committed
3682
    *row+= 2;
3683 3684
    break;
  }
3685
  case MYSQL_TYPE_INT24: /* mediumint is sent as 4 bytes int */
3686 3687
  case MYSQL_TYPE_LONG:
  {
3688 3689
    int32 value= sint4korr(*row);
    longlong data= field_is_unsigned ? (longlong) (uint32) value :
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konstantin@mysql.com committed
3690
                                       (longlong) value;
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konstantin@mysql.com committed
3691
    fetch_long_with_conversion(param, field, data);
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konstantin@mysql.com committed
3692
    *row+= 4;
3693 3694 3695 3696 3697
    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
    longlong value= (longlong)sint8korr(*row);
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konstantin@mysql.com committed
3698
    fetch_long_with_conversion(param, field, value);
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konstantin@mysql.com committed
3699
    *row+= 8;
3700 3701 3702 3703 3704 3705
    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
    float value;
    float4get(value,*row);
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konstantin@mysql.com committed
3706
    fetch_float_with_conversion(param, field, value, FLT_DIG);
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konstantin@mysql.com committed
3707
    *row+= 4;
3708 3709 3710 3711 3712 3713
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
    double value;
    float8get(value,*row);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3714
    fetch_float_with_conversion(param, field, value, DBL_DIG);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3715
    *row+= 8;
3716 3717 3718 3719
    break;
  }
  case MYSQL_TYPE_DATE:
  {
3720
    MYSQL_TIME tm;
3721

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konstantin@mysql.com committed
3722
    read_binary_date(&tm, row);
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konstantin@mysql.com committed
3723
    fetch_datetime_with_conversion(param, &tm);
3724 3725 3726 3727
    break;
  }
  case MYSQL_TYPE_TIME:
  {
3728
    MYSQL_TIME tm;
3729

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konstantin@mysql.com committed
3730
    read_binary_time(&tm, row);
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konstantin@mysql.com committed
3731
    fetch_datetime_with_conversion(param, &tm);
3732 3733 3734 3735 3736 3737
    break;
  }
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME tm;
3738

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konstantin@mysql.com committed
3739
    read_binary_datetime(&tm, row);
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konstantin@mysql.com committed
3740
    fetch_datetime_with_conversion(param, &tm);
3741 3742
    break;
  }
3743
  default:
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konstantin@mysql.com committed
3744 3745
  {
    ulong length= net_field_length(row);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3746
    fetch_string_with_conversion(param, (char*) *row, length);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3747
    *row+= length;
3748 3749
    break;
  }
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konstantin@mysql.com committed
3750
  }
3751 3752
}

3753

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/*
  Functions to fetch data to application buffers without conversion.

  All functions have the following characteristics:

  SYNOPSIS
    fetch_result_xxx()
    param   MySQL bind param
    pos     Row value

  DESCRIPTION
    These are no-conversion functions, used in binary protocol to store
    rows in application buffers. A function used only if type of binary data
    is compatible with type of application buffer.

  RETURN
    none
*/

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3773 3774
static void fetch_result_tinyint(MYSQL_BIND *param, uchar **row)
{
3775
  *(uchar *)param->buffer= **row;
3776
  (*row)++;
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}

static void fetch_result_short(MYSQL_BIND *param, uchar **row)
{
3781
  short value = (short)sint2korr(*row);
3782
  shortstore(param->buffer, value);
3783
  *row+= 2;
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venu@myvenu.com committed
3784 3785 3786 3787
}

static void fetch_result_int32(MYSQL_BIND *param, uchar **row)
{
3788
  int32 value= (int32)sint4korr(*row);
3789
  longstore(param->buffer, value);
3790
  *row+= 4;
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3791 3792 3793
}

static void fetch_result_int64(MYSQL_BIND *param, uchar **row)
3794
{
3795
  longlong value= (longlong)sint8korr(*row);
3796
  longlongstore(param->buffer, value);
3797
  *row+= 8;
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3798 3799 3800 3801 3802 3803
}

static void fetch_result_float(MYSQL_BIND *param, uchar **row)
{
  float value;
  float4get(value,*row);
3804
  floatstore(param->buffer, value);
3805
  *row+= 4;
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venu@myvenu.com committed
3806 3807 3808 3809 3810 3811
}

static void fetch_result_double(MYSQL_BIND *param, uchar **row)
{
  double value;
  float8get(value,*row);
3812
  doublestore(param->buffer, value);
3813
  *row+= 8;
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3814 3815
}

3816 3817 3818
static void fetch_result_time(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
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3819
  read_binary_time(tm, row);
3820 3821 3822 3823 3824
}

static void fetch_result_date(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3825
  read_binary_date(tm, row);
3826 3827 3828 3829 3830
}

static void fetch_result_datetime(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3831
  read_binary_datetime(tm, row);
3832 3833
}

3834
static void fetch_result_bin(MYSQL_BIND *param, uchar **row)
3835
{
3836 3837 3838
  ulong length= net_field_length(row);
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
3839
  *param->length= length;
3840 3841
  *row+= length;
}
3842

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3843 3844 3845
static void fetch_result_str(MYSQL_BIND *param, uchar **row)
{
  ulong length= net_field_length(row);
3846 3847
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
3848 3849
  /* Add an end null if there is room in the buffer */
  if (copy_length != param->buffer_length)
3850
    ((uchar *)param->buffer)[copy_length]= '\0';
3851
  *param->length= length;			/* return total length */
3852
  *row+= length;
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3853 3854
}

3855

3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891
/*
  functions to calculate max lengths for strings during
  mysql_stmt_store_result()
*/

static void skip_result_fixed(MYSQL_BIND *param,
			      MYSQL_FIELD *field __attribute__((unused)),
			      uchar **row)

{
  (*row)+= param->pack_length;
}


static void skip_result_with_length(MYSQL_BIND *param __attribute__((unused)),
				    MYSQL_FIELD *field __attribute__((unused)),
				    uchar **row)

{
  ulong length= net_field_length(row);
  (*row)+= length;
}


static void skip_result_string(MYSQL_BIND *param __attribute__((unused)),
			       MYSQL_FIELD *field,
			       uchar **row)

{
  ulong length= net_field_length(row);
  (*row)+= length;
  if (field->max_length < length)
    field->max_length= length;
}


3892
/*
3893
  Setup the bind buffers for resultset processing
3894 3895
*/

3896
my_bool STDCALL mysql_stmt_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
3897
{
3898
  MYSQL_BIND *param, *end;
3899
  MYSQL_FIELD *field;
3900
  ulong       bind_count= stmt->field_count;
3901
  uint        param_count= 0;
3902
  DBUG_ENTER("mysql_stmt_bind_result");
3903
  DBUG_PRINT("enter",("field_count: %d", bind_count));
3904

3905
  if (!bind_count)
3906
  {
3907 3908 3909 3910
    int errorcode= (int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE ?
                   CR_NO_PREPARE_STMT : CR_NO_STMT_METADATA;
    set_stmt_error(stmt, errorcode, unknown_sqlstate);
    DBUG_RETURN(1);
3911 3912 3913 3914 3915 3916
  }

  /*
    We only need to check that stmt->field_count - if it is not null
    stmt->bind was initialized in mysql_stmt_prepare
   */
3917

3918
  memcpy((char*) stmt->bind, (char*) bind, sizeof(MYSQL_BIND) * bind_count);
3919

3920 3921 3922
  for (param= stmt->bind, end= param + bind_count, field= stmt->fields ;
       param < end ;
       param++, field++)
3923
  {
3924 3925
    DBUG_PRINT("info",("buffer_type: %u  field_type: %u",
                       (uint) param->buffer_type, (uint) field->type));
3926 3927
    /*
      Set param->is_null to point to a dummy variable if it's not set.
3928
      This is to make the execute code easier
3929 3930
    */
    if (!param->is_null)
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3931
      param->is_null= &param->internal_is_null;
3932

3933
    if (!param->length)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3934
      param->length= &param->internal_length;
3935

3936
    param->param_number= param_count++;
3937 3938
    param->offset= 0;

venu@myvenu.com's avatar
venu@myvenu.com committed
3939 3940
    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
3941
    case MYSQL_TYPE_NULL: /* for dummy binds */
3942
      *param->length= 0;
3943
      break;
venu@myvenu.com's avatar
venu@myvenu.com committed
3944 3945
    case MYSQL_TYPE_TINY:
      param->fetch_result= fetch_result_tinyint;
3946
      *param->length= 1;
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venu@myvenu.com committed
3947 3948
      break;
    case MYSQL_TYPE_SHORT:
3949
    case MYSQL_TYPE_YEAR:
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venu@myvenu.com committed
3950
      param->fetch_result= fetch_result_short;
3951
      *param->length= 2;
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3952
      break;
3953
    case MYSQL_TYPE_INT24:
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3954 3955
    case MYSQL_TYPE_LONG:
      param->fetch_result= fetch_result_int32;
3956
      *param->length= 4;
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venu@myvenu.com committed
3957 3958 3959
      break;
    case MYSQL_TYPE_LONGLONG:
      param->fetch_result= fetch_result_int64;
3960
      *param->length= 8;
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venu@myvenu.com committed
3961 3962 3963
      break;
    case MYSQL_TYPE_FLOAT:
      param->fetch_result= fetch_result_float;
3964
      *param->length= 4;
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venu@myvenu.com committed
3965 3966 3967
      break;
    case MYSQL_TYPE_DOUBLE:
      param->fetch_result= fetch_result_double;
3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981
      *param->length= 8;
      break;
    case MYSQL_TYPE_TIME:
      param->fetch_result= fetch_result_time;
      *param->length= sizeof(MYSQL_TIME);
      break;
    case MYSQL_TYPE_DATE:
      param->fetch_result= fetch_result_date;
      *param->length= sizeof(MYSQL_TIME);
      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->fetch_result= fetch_result_datetime;
      *param->length= sizeof(MYSQL_TIME);
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3982 3983 3984 3985
      break;
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
3986
    case MYSQL_TYPE_BLOB:
3987 3988 3989
      DBUG_ASSERT(param->buffer_length != 0);
      param->fetch_result= fetch_result_bin;
      break;
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3990 3991
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
3992
      DBUG_ASSERT(param->buffer_length != 0);
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3993 3994 3995
      param->fetch_result= fetch_result_str;
      break;
    default:
3996
      strmov(stmt->sqlstate, unknown_sqlstate);
3997 3998
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
3999
	      param->buffer_type, param_count);
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4000
      DBUG_RETURN(1);
peter@mysql.com's avatar
peter@mysql.com committed
4001
    }
4002 4003 4004 4005 4006 4007

    /* Setup skip_result functions (to calculate max_length) */
    param->skip_result= skip_result_fixed;
    switch (field->type) {
    case MYSQL_TYPE_NULL: /* for dummy binds */
      param->pack_length= 0;
4008
      field->max_length= 0;
4009 4010 4011
      break;
    case MYSQL_TYPE_TINY:
      param->pack_length= 1;
4012
      field->max_length= 4;                     /* as in '-127' */
4013 4014 4015 4016
      break;
    case MYSQL_TYPE_YEAR:
    case MYSQL_TYPE_SHORT:
      param->pack_length= 2;
4017
      field->max_length= 6;                     /* as in '-32767' */
4018 4019
      break;
    case MYSQL_TYPE_INT24:
4020 4021 4022
      field->max_length= 9;  /* as in '16777216' or in '-8388607' */
      param->pack_length= 4;
      break;
4023
    case MYSQL_TYPE_LONG:
4024
      field->max_length= 11;                    /* '-2147483647' */
4025 4026 4027
      param->pack_length= 4;
      break;
    case MYSQL_TYPE_LONGLONG:
4028
      field->max_length= 21;                    /* '18446744073709551616' */
4029 4030 4031 4032
      param->pack_length= 8;
      break;
    case MYSQL_TYPE_FLOAT:
      param->pack_length= 4;
4033
      field->max_length= MAX_DOUBLE_STRING_REP_LENGTH;
4034 4035 4036
      break;
    case MYSQL_TYPE_DOUBLE:
      param->pack_length= 8;
4037
      field->max_length= MAX_DOUBLE_STRING_REP_LENGTH;
4038 4039 4040 4041 4042 4043
      break;
    case MYSQL_TYPE_TIME:
    case MYSQL_TYPE_DATE:
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->skip_result= skip_result_with_length;
4044
      field->max_length= MAX_DATE_STRING_REP_LENGTH;
4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064
      break;
    case MYSQL_TYPE_DECIMAL:
    case MYSQL_TYPE_ENUM:
    case MYSQL_TYPE_SET:
    case MYSQL_TYPE_GEOMETRY:
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
    case MYSQL_TYPE_BLOB:
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
      param->skip_result= skip_result_string;
      break;
    default:
      strmov(stmt->sqlstate, unknown_sqlstate);
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
	      field->type, param_count);
      DBUG_RETURN(1);
    }
4065
  }
4066
  stmt->bind_result_done= TRUE;
4067 4068 4069
  DBUG_RETURN(0);
}

4070

4071
/*
4072
  Fetch row data to bind buffers
4073 4074
*/

4075
static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
4076
{
4077
  MYSQL_BIND  *bind, *end;
4078
  MYSQL_FIELD *field;
4079
  uchar *null_ptr, bit;
4080 4081 4082 4083 4084 4085
  /*
    Precondition: if stmt->field_count is zero or row is NULL, read_row_*
    function must return no data.
  */
  DBUG_ASSERT(stmt->field_count);
  DBUG_ASSERT(row);
4086

4087 4088 4089
  if (!stmt->bind_result_done)
  {
    /* If output parameters were not bound we should just return success */
4090
    return 0;
4091
  }
4092 4093

  null_ptr= row;
4094 4095
  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */
4096

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4097
  /* Copy complete row to application buffers */
4098 4099
  for (bind= stmt->bind, end= bind + stmt->field_count, field= stmt->fields ;
       bind < end ;
4100
       bind++, field++)
4101
  {
4102
    if (*null_ptr & bit)
4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113
    {
      /*
        We should set both inter_buffer and is_null to be able to see
        nulls in mysql_stmt_fetch_column. This is because is_null may point
        to user data which can be overwritten between mysql_stmt_fetch and
        mysql_stmt_fetch_column, and in this case nullness of column will be
        lost. See mysql_stmt_fetch_column for details.
      */
      bind->inter_buffer= NULL;
      *bind->is_null= 1;
    }
4114
    else
4115
    {
4116
      *bind->is_null= 0;
4117
      bind->inter_buffer= row;
4118 4119
      if (field->type == bind->buffer_type)
        (*bind->fetch_result)(bind, &row);
4120
      else
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4121
        fetch_result_with_conversion(bind, field, &row);
4122
    }
4123
    if (!((bit<<=1) & 255))
4124
    {
4125
      bit= 1;					/* To next byte */
4126
      null_ptr++;
4127 4128 4129 4130 4131
    }
  }
  return 0;
}

4132

4133
int cli_unbuffered_fetch(MYSQL *mysql, char **row)
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4134 4135 4136 4137
{
  if (packet_error == net_safe_read(mysql))
    return 1;

4138 4139
  *row= ((mysql->net.read_pos[0] == 254) ? NULL :
	 (char*) (mysql->net.read_pos+1));
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4140 4141
  return 0;
}
4142

4143

4144
/*
4145
  Fetch and return row data to bound buffers, if any
4146 4147
*/

4148
int STDCALL mysql_stmt_fetch(MYSQL_STMT *stmt)
4149
{
4150
  int rc;
4151
  uchar *row;
4152
  DBUG_ENTER("mysql_stmt_fetch");
4153

4154 4155
  if ((rc= (*stmt->read_row_func)(stmt, &row)) ||
      (rc= stmt_fetch_row(stmt, row)))
4156
  {
4157 4158
    stmt->state= MYSQL_STMT_PREPARE_DONE;       /* XXX: this is buggy */
    stmt->read_row_func= stmt_read_row_no_data;
4159
  }
4160
  else
4161
  {
4162 4163
    /* This is to know in mysql_stmt_fetch_column that data was fetched */
    stmt->state= MYSQL_STMT_FETCH_DONE;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4164
  }
4165
  DBUG_RETURN(rc);
4166 4167
}

4168

4169
/*
4170
  Fetch data for one specified column data
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4171 4172

  SYNOPSIS
4173
    mysql_stmt_fetch_column()
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monty@mashka.mysql.fi committed
4174
    stmt		Prepared statement handler
4175
    bind		Where data should be placed. Should be filled in as
4176
			when calling mysql_stmt_bind_result()
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4177 4178 4179
    column		Column to fetch (first column is 0)
    ulong offset	Offset in result data (to fetch blob in pieces)
			This is normally 0
4180
  RETURN
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4181 4182
    0	ok
    1	error
4183 4184
*/

4185
int STDCALL mysql_stmt_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *bind,
4186
                                    uint column, ulong offset)
4187
{
4188
  MYSQL_BIND *param= stmt->bind+column;
4189
  DBUG_ENTER("mysql_stmt_fetch_column");
4190

4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201
  if ((int) stmt->state < (int) MYSQL_STMT_FETCH_DONE)
  {
    set_stmt_error(stmt, CR_NO_DATA, unknown_sqlstate);
    return 1;
  }
  if (column >= stmt->field_count)
  {
    set_stmt_error(stmt, CR_INVALID_PARAMETER_NO, unknown_sqlstate);
    DBUG_RETURN(1);
  }

4202
  if (param->inter_buffer)
4203
  {
4204
    MYSQL_FIELD *field= stmt->fields+column;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4205
    uchar *row= param->inter_buffer;
4206 4207 4208 4209
    bind->offset= offset;
    if (bind->is_null)
      *bind->is_null= 0;
    if (bind->length) /* Set the length if non char/binary types */
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4210
      *bind->length= *param->length;
4211
    else
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4212
      bind->length= &param->internal_length;	/* Needed for fetch_result() */
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4213
    fetch_result_with_conversion(bind, field, &row);
4214
  }
4215 4216 4217 4218 4219
  else
  {
    if (bind->is_null)
      *bind->is_null= 1;
  }
4220 4221 4222 4223
  DBUG_RETURN(0);
}


4224
/*
4225 4226 4227
  Read all rows of data from server  (binary format)
*/

4228
int cli_read_binary_rows(MYSQL_STMT *stmt)
4229 4230 4231 4232
{
  ulong      pkt_len;
  uchar      *cp;
  MYSQL      *mysql= stmt->mysql;
4233 4234
  MYSQL_DATA *result= &stmt->result;
  MYSQL_ROWS *cur, **prev_ptr= &result->data;
4235
  NET        *net = &mysql->net;
4236
  DBUG_ENTER("cli_read_binary_rows");
4237

4238
  mysql= mysql->last_used_con;
4239

4240
  while ((pkt_len= net_safe_read(mysql)) != packet_error)
4241
  {
4242 4243
    cp= net->read_pos;
    if (cp[0] != 254 || pkt_len >= 8)
4244
    {
4245 4246 4247 4248
      if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,
                                          sizeof(MYSQL_ROWS) + pkt_len - 1)))
      {
        set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
4249
        goto err;
4250 4251 4252 4253 4254
      }
      cur->data= (MYSQL_ROW) (cur+1);
      *prev_ptr= cur;
      prev_ptr= &cur->next;
      memcpy((char *) cur->data, (char *) cp+1, pkt_len-1);
4255 4256
      cur->length= pkt_len;		/* To allow us to do sanity checks */
      result->rows++;
4257
    }
4258
    else
4259
    {
4260 4261 4262 4263
      /* end of data */
      *prev_ptr= 0;
      mysql->warning_count= uint2korr(cp+1);
      mysql->server_status= uint2korr(cp+3);
4264 4265
      DBUG_PRINT("info",("status: %u  warning_count: %u",
                         mysql->server_status, mysql->warning_count));
4266 4267 4268
      DBUG_RETURN(0);
    }
  }
4269
  set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
4270 4271

err:
4272
  DBUG_RETURN(1);
4273 4274
}

4275

4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301
/*
  Update meta data for statement

  SYNOPSIS
    stmt_update_metadata()
    stmt			Statement handler
    row				Binary data

  NOTES
    Only updates MYSQL_FIELD->max_length for strings
*/

static void stmt_update_metadata(MYSQL_STMT *stmt, MYSQL_ROWS *data)
{
  MYSQL_BIND  *bind, *end;
  MYSQL_FIELD *field;
  uchar *null_ptr, bit;
  uchar *row= (uchar*) data->data;
#ifndef DBUG_OFF
  uchar *row_end= row + data->length;
#endif

  null_ptr= row;
  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */

4302
  /* Go through all fields and calculate metadata */
4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318
  for (bind= stmt->bind, end= bind + stmt->field_count, field= stmt->fields ;
       bind < end ;
       bind++, field++)
  {
    if (!(*null_ptr & bit))
      (*bind->skip_result)(bind, field, &row);
    DBUG_ASSERT(row <= row_end);
    if (!((bit<<=1) & 255))
    {
      bit= 1;					/* To next byte */
      null_ptr++;
    }
  }
}


4319 4320 4321 4322 4323 4324 4325
/*
  Store or buffer the binary results to stmt
*/

int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
{
  MYSQL *mysql= stmt->mysql;
4326
  MYSQL_DATA *result= &stmt->result;
4327
  DBUG_ENTER("mysql_stmt_store_result");
4328 4329 4330 4331 4332

  mysql= mysql->last_used_con;

  if (!stmt->field_count)
    DBUG_RETURN(0);
4333 4334
  if ((int) stmt->state < (int) MYSQL_STMT_EXECUTE_DONE ||
      mysql->status != MYSQL_STATUS_GET_RESULT)
4335
  {
4336
    set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
4337
    DBUG_RETURN(1);
4338
  }
4339
  if (result->data)
4340
  {
4341 4342 4343 4344
    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
    stmt->data_cursor= NULL;
4345
  }
4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360

  if (stmt->update_max_length && !stmt->bind_result_done)
  {
    /*
      We must initalize the bind structure to be able to calculate
      max_length
    */
    MYSQL_BIND  *bind, *end;
    MYSQL_FIELD *field;
    bzero((char*) stmt->bind, sizeof(*stmt->bind)* stmt->field_count);

    for (bind= stmt->bind, end= bind + stmt->field_count, field= stmt->fields;
	 bind < end ;
	 bind++, field++)
    {
4361
      bind->buffer_type= MYSQL_TYPE_NULL;
4362 4363 4364
      bind->buffer_length=1;
    }

4365 4366
    if (mysql_stmt_bind_result(stmt, stmt->bind))
      DBUG_RETURN(1);
4367 4368 4369
    stmt->bind_result_done= 0;			/* No normal bind done */
  }

4370
  if ((*mysql->methods->read_binary_rows)(stmt))
4371
  {
4372 4373 4374
    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
4375
    mysql->status= MYSQL_STATUS_READY;
4376
    DBUG_RETURN(1);
4377
  }
4378

4379 4380 4381 4382 4383 4384 4385
  if (stmt->update_max_length)
  {
    MYSQL_ROWS *cur= result->data;
    for(; cur; cur=cur->next)
      stmt_update_metadata(stmt, cur);
  }

4386 4387
  stmt->data_cursor= result->data;
  mysql->affected_rows= stmt->affected_rows= result->rows;
4388 4389 4390
  stmt->read_row_func= stmt_read_row_buffered;
  mysql->unbuffered_fetch_owner= 0;             /* set in stmt_execute */
  mysql->status= MYSQL_STATUS_READY;		/* server is ready */
4391
  DBUG_RETURN(0); /* Data buffered, must be fetched with mysql_stmt_fetch() */
4392 4393
}

4394

4395 4396 4397 4398 4399 4400 4401
/*
  Seek to desired row in the statement result set
*/

MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_seek(MYSQL_STMT *stmt, MYSQL_ROW_OFFSET row)
{
4402
  MYSQL_ROW_OFFSET offset= stmt->data_cursor;
4403
  DBUG_ENTER("mysql_stmt_row_seek");
4404

4405 4406
  stmt->data_cursor= row;
  DBUG_RETURN(offset);
4407 4408
}

4409

4410 4411 4412 4413
/*
  Return the current statement row cursor position
*/

4414
MYSQL_ROW_OFFSET STDCALL
4415 4416 4417
mysql_stmt_row_tell(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_row_tell");
4418

4419
  DBUG_RETURN(stmt->data_cursor);
4420 4421
}

4422

4423 4424 4425 4426 4427 4428 4429
/*
  Move the stmt result set data cursor to specified row
*/

void STDCALL
mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong row)
{
4430
  MYSQL_ROWS *tmp= stmt->result.data;
4431 4432
  DBUG_ENTER("mysql_stmt_data_seek");
  DBUG_PRINT("enter",("row id to seek: %ld",(long) row));
4433

4434 4435 4436
  for (; tmp && row; --row, tmp= tmp->next)
    ;
  stmt->data_cursor= tmp;
4437 4438 4439 4440 4441 4442
  if (!row && tmp)
  {
       /*  Rewind the counter */
    stmt->read_row_func= stmt_read_row_buffered;
    stmt->state= MYSQL_STMT_EXECUTE_DONE;
  }
4443
  DBUG_VOID_RETURN;
4444 4445
}

4446

4447 4448 4449 4450 4451 4452 4453
/*
  Return total rows the current statement result set
*/

my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_num_rows");
4454

4455
  DBUG_RETURN(stmt->result.rows);
4456
}
4457

4458 4459
my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt)
{
4460
  MYSQL_DATA *result= &stmt->result;
4461 4462 4463
  DBUG_ENTER("mysql_stmt_free_result");

  DBUG_ASSERT(stmt != 0);
4464

4465 4466 4467 4468
  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    MYSQL *mysql= stmt->mysql;

4469
    if (result->data)
4470 4471
    {
      /* Result buffered */
4472 4473 4474 4475
      free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
      result->data= NULL;
      result->rows= 0;
      stmt->data_cursor= NULL;
4476
    }
4477 4478 4479

    if (mysql && stmt->field_count &&
        (int) stmt->state > (int) MYSQL_STMT_PREPARE_DONE)
4480 4481 4482 4483 4484 4485
    {
      if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
        mysql->unbuffered_fetch_owner= 0;
      if (mysql->status != MYSQL_STATUS_READY)
      {
        /* There is a result set and it belongs to this statement */
4486
        (*mysql->methods->flush_use_result)(mysql);
4487 4488 4489 4490 4491 4492 4493 4494 4495
        mysql->status= MYSQL_STATUS_READY;
      }
    }
    stmt->state= MYSQL_STMT_PREPARE_DONE;
    stmt->read_row_func= stmt_read_row_no_data;
  }
  DBUG_RETURN(0);
}

4496
/********************************************************************
4497
 statement error handling and close
4498
*********************************************************************/
4499

4500
/*
4501
  Close the statement handle by freeing all alloced resources
4502

4503
  SYNOPSIS
4504
    mysql_stmt_close()
4505
    stmt	       Statement handle
4506

4507 4508 4509 4510
  RETURN VALUES
    0	ok
    1	error
*/
4511

4512
my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
4513
{
4514 4515 4516
  MYSQL *mysql= stmt->mysql;
  int rc= 0;
  DBUG_ENTER("mysql_stmt_close");
4517

4518
  free_root(&stmt->result.alloc, MYF(0));
4519 4520 4521
  free_root(&stmt->mem_root, MYF(0));

  if (mysql)
4522
  {
4523
    mysql->stmts= list_delete(mysql->stmts, &stmt->list);
4524 4525 4526 4527 4528
    /*
      Clear NET error state: if the following commands come through
      successfully, connection will still be usable for other commands.
    */
    net_clear_error(&mysql->net);
4529
    if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
4530
    {
4531
      char buff[MYSQL_STMT_HEADER];             /* 4 bytes - stmt id */
4532 4533 4534 4535 4536

      if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
        mysql->unbuffered_fetch_owner= 0;
      if (mysql->status != MYSQL_STATUS_READY)
      {
4537
        /*
4538 4539 4540
          Flush result set of the connection. If it does not belong
          to this statement, set a warning.
        */
4541
        (*mysql->methods->flush_use_result)(mysql);
4542 4543 4544 4545 4546 4547 4548 4549 4550 4551
        if (mysql->unbuffered_fetch_owner)
          *mysql->unbuffered_fetch_owner= TRUE;
        mysql->status= MYSQL_STATUS_READY;
      }
      int4store(buff, stmt->stmt_id);
      if ((rc= simple_command(mysql, COM_CLOSE_STMT, buff, 4, 1)))
      {
        set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                        mysql->net.sqlstate);
      }
4552
    }
4553
  }
4554

4555
  my_free((gptr) stmt, MYF(MY_WME));
4556

4557
  DBUG_RETURN(test(rc));
4558 4559
}

4560 4561 4562 4563 4564 4565
/*
  Reset the statement buffers in server
*/

my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
{
4566
  char buff[MYSQL_STMT_HEADER]; /* packet header: 4 bytes for stmt id */
4567
  MYSQL *mysql;
4568
  MYSQL_BIND *param, *param_end;
4569 4570
  DBUG_ENTER("mysql_stmt_reset");
  DBUG_ASSERT(stmt != 0);
4571 4572 4573 4574

  /* If statement hasnt been prepared there is nothing to reset */
  if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
    DBUG_RETURN(0);
4575

4576 4577
  mysql= stmt->mysql->last_used_con;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
4578
  if ((*mysql->methods->advanced_command)(mysql, COM_RESET_STMT, buff,
4579
                                          sizeof(buff), 0, 0, 0))
4580
  {
4581
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
4582 4583 4584
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
  }
4585 4586 4587 4588 4589 4590 4591

  /* Clear long_data_used for next call (as we do in mysql_stmt_execute() */
  for (param= stmt->params, param_end= param + stmt->param_count;
       param < param_end;
       param++)
    param->long_data_used= 0;

4592 4593 4594
  DBUG_RETURN(0);
}

4595 4596 4597 4598 4599 4600 4601
/*
  Return statement error code
*/

uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_errno");
4602
  DBUG_RETURN(stmt->last_errno);
4603 4604
}

4605 4606 4607 4608 4609 4610
const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_sqlstate");
  DBUG_RETURN(stmt->sqlstate);
}

4611 4612 4613 4614 4615 4616 4617
/*
  Return statement error message
*/

const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_error");
4618
  DBUG_RETURN(stmt->last_error);
4619 4620
}

4621

4622 4623 4624 4625
/********************************************************************
 Transactional APIs
*********************************************************************/

4626 4627 4628 4629
/*
  Commit the current transaction
*/

4630
my_bool STDCALL mysql_commit(MYSQL * mysql)
4631 4632
{
  DBUG_ENTER("mysql_commit");
4633
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
4634 4635 4636
}

/*
4637
  Rollback the current transaction
4638 4639
*/

4640
my_bool STDCALL mysql_rollback(MYSQL * mysql)
4641 4642
{
  DBUG_ENTER("mysql_rollback");
4643
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
4644 4645 4646 4647 4648 4649 4650
}


/*
  Set autocommit to either true or false
*/

4651
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
4652 4653 4654 4655 4656
{
  DBUG_ENTER("mysql_autocommit");
  DBUG_PRINT("enter", ("mode : %d", auto_mode));

  if (auto_mode) /* set to true */
4657 4658
    DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=1", 16));
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=0", 16));
4659
}
4660 4661 4662


/********************************************************************
4663
 Multi query execution + SPs APIs
4664 4665 4666
*********************************************************************/

/*
4667 4668
  Returns true/false to indicate whether any more query results exist
  to be read using mysql_next_result()
4669 4670 4671 4672
*/

my_bool STDCALL mysql_more_results(MYSQL *mysql)
{
4673
  my_bool res;
4674
  DBUG_ENTER("mysql_more_results");
4675 4676

  res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ?
4677
	1: 0);
4678
  DBUG_PRINT("exit",("More results exists ? %d", res));
4679
  DBUG_RETURN(res);
4680 4681
}

4682

4683 4684 4685
/*
  Reads and returns the next query results
*/
4686
int STDCALL mysql_next_result(MYSQL *mysql)
4687
{
4688
  DBUG_ENTER("mysql_next_result");
4689

4690 4691 4692 4693 4694 4695 4696 4697
  if (mysql->status != MYSQL_STATUS_READY)
  {
    strmov(mysql->net.sqlstate, unknown_sqlstate);
    strmov(mysql->net.last_error,
	   ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
    DBUG_RETURN(1);
  }

4698 4699
  mysql->net.last_error[0]= 0;
  mysql->net.last_errno= 0;
4700
  strmov(mysql->net.sqlstate, not_error_sqlstate);
4701 4702 4703
  mysql->affected_rows= ~(my_ulonglong) 0;

  if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
4704 4705
    DBUG_RETURN((*mysql->methods->next_result)(mysql));

4706
  DBUG_RETURN(-1);				/* No more results */
4707
}
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hf@deer.(none) committed
4708

4709

hf@deer.(none)'s avatar
hf@deer.(none) committed
4710 4711 4712 4713 4714 4715 4716 4717 4718 4719
MYSQL_RES * STDCALL mysql_use_result(MYSQL *mysql)
{
  return (*mysql->methods->use_result)(mysql);
}

my_bool STDCALL mysql_read_query_result(MYSQL *mysql)
{
  return (*mysql->methods->read_query_result)(mysql);
}