/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB 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 the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 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 */ /* This file is included by all internal myisam files */ #include "myisam.h" /* Structs & some defines */ #include "myisampack.h" /* packing of keys */ #include <my_tree.h> #ifdef THREAD #include <my_pthread.h> #include <thr_lock.h> #else #include <my_no_pthread.h> #endif #if defined(my_write) && !defined(MAP_TO_USE_RAID) #undef my_write /* undef map from my_nosys; We need test-if-disk full */ #endif typedef struct st_mi_status_info { ha_rows records; /* Rows in table */ ha_rows del; /* Removed rows */ my_off_t empty; /* lost space in datafile */ my_off_t key_empty; /* lost space in indexfile */ my_off_t key_file_length; my_off_t data_file_length; } MI_STATUS_INFO; typedef struct st_mi_state_info { struct { /* Fileheader */ uchar file_version[4]; uchar options[2]; uchar header_length[2]; uchar state_info_length[2]; uchar base_info_length[2]; uchar base_pos[2]; uchar key_parts[2]; /* Key parts */ uchar unique_key_parts[2]; /* Key parts + unique parts */ uchar keys; /* number of keys in file */ uchar uniques; /* number of UNIQUE definitions */ uchar language; /* Language for indexes */ uchar max_block_size; /* max keyblock size */ uchar not_used[2]; /* To align to 8 */ } header; MI_STATUS_INFO state; ha_rows split; /* number of split blocks */ my_off_t dellink; /* Link to next removed block */ ulonglong auto_increment; ulong process; /* process that updated table last */ ulong unique; /* Unique number for this process */ ulong update_count; /* Updated for each write lock */ ulong status; my_off_t *key_root; /* Start of key trees */ my_off_t *key_del; /* delete links for trees */ ulong sec_index_changed; /* Updated when new sec_index */ ulong sec_index_used; /* which extra index are in use */ ulonglong key_map; /* Which keys are in use */ ha_checksum checksum; ulong version; /* timestamp of create */ time_t create_time; /* Time when created database */ time_t recover_time; /* Time for last recover */ time_t check_time; /* Time for last check */ uint sortkey; /* sorted by this key (not used) */ uint open_count; uint8 changed; /* Changed since myisamchk */ my_off_t rec_per_key_rows; /* Rows when calculating rec_per_key */ ulong *rec_per_key_part; /* the following isn't saved on disk */ uint state_diff_length; /* Should be 0 */ uint state_length; /* Length of state header in file */ ulong *key_info; } MI_STATE_INFO; #define MI_STATE_INFO_SIZE (24+14*8+7*4+2*2+8) #define MI_STATE_KEY_SIZE 8 #define MI_STATE_KEYBLOCK_SIZE 8 #define MI_STATE_KEYSEG_SIZE 4 #define MI_STATE_EXTRA_SIZE ((MI_MAX_KEY+MI_MAX_KEY_BLOCK_SIZE)*MI_STATE_KEY_SIZE + MI_MAX_KEY*MI_MAX_KEY_SEG*MI_STATE_KEYSEG_SIZE) #define MI_KEYDEF_SIZE (2+ 5*2) #define MI_UNIQUEDEF_SIZE (2+1+1) #define MI_KEYSEG_SIZE (6+ 2*2 + 4*2) #define MI_COLUMNDEF_SIZE (2*3+1) #define MI_BASE_INFO_SIZE (5*8 + 8*4 + 4 + 4*2 + 16) #define MI_INDEX_BLOCK_MARGIN 16 /* Safety margin for .MYI tables */ typedef struct st_mi_base_info { my_off_t keystart; /* Start of keys */ my_off_t max_data_file_length; my_off_t max_key_file_length; my_off_t margin_key_file_length; ha_rows records,reloc; /* Create information */ ulong mean_row_length; /* Create information */ ulong reclength; /* length of unpacked record */ ulong pack_reclength; /* Length of full packed rec. */ ulong min_pack_length; ulong max_pack_length; /* Max possibly length of packed rec.*/ ulong min_block_length; ulong fields, /* fields in table */ pack_fields; /* packed fields in table */ uint rec_reflength; /* = 2-8 */ uint key_reflength; /* = 2-8 */ uint keys; /* same as in state.header */ uint auto_key; /* Which key-1 is a auto key */ uint blobs; /* Number of blobs */ uint pack_bits; /* Length of packed bits */ uint max_key_block_length; /* Max block length */ uint max_key_length; /* Max key length */ /* Extra allocation when using dynamic record format */ uint extra_alloc_bytes; uint extra_alloc_procent; /* Info about raid */ uint raid_type,raid_chunks; ulong raid_chunksize; /* The following are from the header */ uint key_parts,all_key_parts; } MI_BASE_INFO; /* Structs used intern in database */ typedef struct st_mi_blob /* Info of record */ { ulong offset; /* Offset to blob in record */ uint pack_length; /* Type of packed length */ ulong length; /* Calc:ed for each record */ } MI_BLOB; typedef struct st_mi_isam_pack { ulong header_length; uint ref_length; } MI_PACK; typedef struct st_mi_isam_share { /* Shared between opens */ MI_STATE_INFO state; MI_BASE_INFO base; MI_KEYDEF *keyinfo; /* Key definitions */ MI_UNIQUEDEF *uniqueinfo; /* unique definitions */ MI_KEYSEG *keyparts; /* key part info */ MI_COLUMNDEF *rec; /* Pointer to field information */ MI_PACK pack; /* Data about packed records */ MI_BLOB *blobs; /* Pointer to blobs */ char *filename; /* Name of indexfile */ byte *file_map; /* mem-map of file if possible */ ulong this_process; /* processid */ ulong last_process; /* For table-change-check */ ulong last_version; /* Version on start */ ulong options; /* Options used */ uint rec_reflength; /* rec_reflength in use now */ int kfile; /* Shared keyfile */ int data_file; /* Shared data file */ int mode; /* mode of file on open */ uint reopen; /* How many times reopened */ uint w_locks,r_locks; /* Number of read/write locks */ uint blocksize; /* blocksize of keyfile */ ulong min_pack_length; /* Theese are used by packed data */ ulong max_pack_length; ulong state_diff_length; my_bool changed, /* If changed since lock */ global_changed, /* If changed since open */ not_flushed, temporary,delay_key_write, concurrent_insert, fulltext_index; myf write_flag; int rnd; /* rnd-counter */ MI_DECODE_TREE *decode_trees; uint16 *decode_tables; enum data_file_type data_file_type; int (*read_record)(struct st_myisam_info*, my_off_t, byte*); int (*write_record)(struct st_myisam_info*, const byte*); int (*update_record)(struct st_myisam_info*, my_off_t, const byte*); int (*delete_record)(struct st_myisam_info*); int (*read_rnd)(struct st_myisam_info*, byte*, my_off_t, my_bool); int (*compare_record)(struct st_myisam_info*, const byte *); ha_checksum (*calc_checksum)(struct st_myisam_info*, const byte *); int (*compare_unique)(struct st_myisam_info*, MI_UNIQUEDEF *, const byte *record, my_off_t pos); #ifdef THREAD THR_LOCK lock; pthread_mutex_t intern_lock; /* Locking for use with _locking */ rw_lock_t *key_root_lock; #endif } MYISAM_SHARE; typedef uint mi_bit_type; typedef struct st_mi_bit_buff { /* Used for packing of record */ mi_bit_type current_byte; uint bits; uchar *pos,*end,*blob_pos; uint error; } MI_BIT_BUFF; struct st_myisam_info { MYISAM_SHARE *s; /* Shared between open:s */ MI_STATUS_INFO *state,save_state; MI_BLOB *blobs; /* Pointer to blobs */ int dfile; /* The datafile */ MI_BIT_BUFF bit_buff; uint opt_flag; /* Optim. for space/speed */ uint update; /* If file changed since open */ char *filename; /* parameter to open filename */ ulong this_unique; /* uniq filenumber or thread */ ulong last_unique; /* last unique number */ ulong this_loop; /* counter for this open */ ulong last_loop; /* last used counter */ my_off_t lastpos, /* Last record position */ nextpos; /* Position to next record */ my_off_t save_lastpos; my_off_t pos; /* Intern variable */ ha_checksum checksum; ulong packed_length,blob_length; /* Length of found, packed record */ uint alloced_rec_buff_length; /* Max recordlength malloced */ uchar *buff, /* Temp area for key */ *lastkey,*lastkey2; /* Last used search key */ byte *rec_buff, /* Tempbuff for recordpack */ *rec_alloc; /* Malloced area for record */ uchar *int_keypos, /* Save position for next/previous */ *int_maxpos; /* -""- */ uint32 int_keytree_version; /* -""- */ uint int_nod_flag; /* -""- */ my_off_t last_keypage; /* Last key page read */ my_off_t last_search_keypage; /* Last keypage when searching */ my_off_t dupp_key_pos; int lastinx; /* Last used index */ uint lastkey_length; /* Length of key in lastkey */ uint last_rkey_length; /* Last length in mi_rkey() */ uint save_lastkey_length; int errkey; /* Got last error on this key */ int lock_type; /* How database was locked */ int tmp_lock_type; /* When locked by readinfo */ uint data_changed; /* Somebody has changed data */ uint save_update; /* When using KEY_READ */ int save_lastinx; my_bool was_locked; /* Was locked in panic */ my_bool quick_mode; my_bool page_changed; /* If info->buff can't be used for rnext */ my_bool buff_used; /* If info->buff has to be reread for rnext */ my_bool use_packed_key; /* For MYISAMMRG */ TREE *bulk_insert; /* accumulate indexfile changes between mi_write's */ myf lock_wait; /* is 0 or MY_DONT_WAIT */ int (*read_record)(struct st_myisam_info*, my_off_t, byte*); LIST open_list; IO_CACHE rec_cache; /* When cacheing records */ #ifdef THREAD THR_LOCK_DATA lock; #endif }; /* Some defines used by isam-funktions */ #define USE_WHOLE_KEY MI_MAX_KEY_BUFF*2 /* Use whole key in _mi_search() */ #define F_EXTRA_LCK -1 /* bits in opt_flag */ #define MEMMAP_USED 32 #define REMEMBER_OLD_POS 64 #define WRITEINFO_UPDATE_KEYFILE 1 #define WRITEINFO_NO_UNLOCK 2 /* bits in state.changed */ #define STATE_CHANGED 1 #define STATE_CRASHED 2 #define STATE_CRASHED_ON_REPAIR 4 #define STATE_NOT_ANALYZED 8 #define STATE_NOT_OPTIMIZED_KEYS 16 #define STATE_NOT_SORTED_PAGES 32 /* options to mi_read_cache */ #define READING_NEXT 1 #define READING_HEADER 2 #define mi_getint(x) ((uint) mi_uint2korr(x) & 32767) #define mi_putint(x,y,nod) { uint16 boh=(nod ? (uint16) 32768 : 0) + (uint16) (y);\ mi_int2store(x,boh); } #define mi_test_if_nod(x) (x[0] & 128 ? info->s->base.key_reflength : 0) #define mi_mark_crashed(x) (x)->s->state.changed|=STATE_CRASHED #define mi_mark_crashed_on_repair(x) { (x)->s->state.changed|=STATE_CRASHED|STATE_CRASHED_ON_REPAIR ; (x)->update|= HA_STATE_CHANGED; } #define mi_is_crashed(x) ((x)->s->state.changed & STATE_CRASHED) #define mi_is_crashed_on_repair(x) ((x)->s->state.changed & STATE_CRASHED_ON_REPAIR) /* Functions to store length of space packed keys, VARCHAR or BLOB keys */ #define store_key_length_inc(key,length) \ { if ((length) < 255) \ { *(key)++=(length); } \ else \ { *(key)=255; mi_int2store((key)+1,(length)); (key)+=3; } \ } #define store_key_length(key,length) \ { if ((length) < 255) \ { *(key)=(length); } \ else \ { *(key)=255; mi_int2store((key)+1,(length)); } \ } #define get_key_length(length,key) \ { if ((uchar) *(key) != 255) \ length= (uint) (uchar) *((key)++); \ else \ { length=mi_uint2korr((key)+1); (key)+=3; } \ } #define get_key_full_length(length,key) \ { if ((uchar) *(key) != 255) \ length= ((uint) (uchar) *((key)++))+1; \ else \ { length=mi_uint2korr((key)+1)+3; (key)+=3; } \ } #define get_key_pack_length(length,length_pack,key) \ { if ((uchar) *(key) != 255) \ { length= (uint) (uchar) *((key)++); length_pack=1; }\ else \ { length=mi_uint2korr((key)+1); (key)+=3; length_pack=3; } \ } #define get_pack_length(length) ((length) >= 255 ? 3 : 1) #define MI_MIN_BLOCK_LENGTH 20 /* Because of delete-link */ #define MI_EXTEND_BLOCK_LENGTH 20 /* Don't use to small record-blocks */ #define MI_SPLIT_LENGTH ((MI_EXTEND_BLOCK_LENGTH+4)*2) #define MI_MAX_DYN_BLOCK_HEADER 20 /* Max prefix of record-block */ #define MI_BLOCK_INFO_HEADER_LENGTH 20 #define MI_DYN_DELETE_BLOCK_HEADER 20 /* length of delete-block-header */ #define MI_DYN_MAX_BLOCK_LENGTH ((1L << 24)-4L) #define MI_DYN_MAX_ROW_LENGTH (MI_DYN_MAX_BLOCK_LENGTH - MI_SPLIT_LENGTH) #define MI_DYN_ALIGN_SIZE 4 /* Align blocks on this */ #define MI_MAX_DYN_HEADER_BYTE 12 /* max header byte for dynamic rows */ #define MEMMAP_EXTRA_MARGIN 7 /* Write this as a suffix for file */ #define PACK_TYPE_SELECTED 1 /* Bits in field->pack_type */ #define PACK_TYPE_SPACE_FIELDS 2 #define PACK_TYPE_ZERO_FILL 4 #define MI_FOUND_WRONG_KEY 32738 /* Impossible value from _mi_key_cmp */ #define MI_KEY_BLOCK_LENGTH 1024 /* Min key block length */ #define MI_MAX_KEY_BLOCK_LENGTH 8192 #define MI_MAX_KEY_BLOCK_SIZE (MI_MAX_KEY_BLOCK_LENGTH/MI_KEY_BLOCK_LENGTH) #define MI_BLOCK_SIZE(key_length,data_pointer,key_pointer) ((((key_length+data_pointer+key_pointer)*4+key_pointer+2)/MI_KEY_BLOCK_LENGTH+1)*MI_KEY_BLOCK_LENGTH) #define MI_MAX_KEYPTR_SIZE 5 /* For calculating block lengths */ #define MI_MIN_KEYBLOCK_LENGTH 50 /* When to split delete blocks */ /* The UNIQUE check is done with a hashed long key */ #define MI_UNIQUE_HASH_TYPE HA_KEYTYPE_ULONG_INT #define mi_unique_store(A,B) mi_int4store((A),(B)) #ifdef THREAD extern pthread_mutex_t THR_LOCK_myisam; #endif #if !defined(THREAD) || defined(DONT_USE_RW_LOCKS) #define rw_wrlock(A) {} #define rw_rdlock(A) {} #define rw_unlock(A) {} #endif /* Some extern variables */ extern LIST *myisam_open_list; extern uchar NEAR myisam_file_magic[],NEAR myisam_pack_file_magic[]; extern uint NEAR myisam_read_vec[],NEAR myisam_readnext_vec[]; extern uint myisam_quick_table_bits; extern File myisam_log_file; extern ulong myisam_pid; /* This is used by _mi_calc_xxx_key_length och _mi_store_key */ typedef struct st_mi_s_param { uint ref_length,key_length, n_ref_length, n_length, totlength, part_of_prev_key,prev_length,pack_marker; uchar *key, *prev_key,*next_key_pos; bool store_not_null; } MI_KEY_PARAM; /* Prototypes for intern functions */ extern int _mi_read_dynamic_record(MI_INFO *info,my_off_t filepos,byte *buf); extern int _mi_write_dynamic_record(MI_INFO*, const byte*); extern int _mi_update_dynamic_record(MI_INFO*, my_off_t, const byte*); extern int _mi_delete_dynamic_record(MI_INFO *info); extern int _mi_cmp_dynamic_record(MI_INFO *info,const byte *record); extern int _mi_read_rnd_dynamic_record(MI_INFO *, byte *,my_off_t, my_bool); extern int _mi_write_blob_record(MI_INFO*, const byte*); extern int _mi_update_blob_record(MI_INFO*, my_off_t, const byte*); extern int _mi_read_static_record(MI_INFO *info, my_off_t filepos,byte *buf); extern int _mi_write_static_record(MI_INFO*, const byte*); extern int _mi_update_static_record(MI_INFO*, my_off_t, const byte*); extern int _mi_delete_static_record(MI_INFO *info); extern int _mi_cmp_static_record(MI_INFO *info,const byte *record); extern int _mi_read_rnd_static_record(MI_INFO*, byte *,my_off_t, my_bool); extern int _mi_ck_write(MI_INFO *info,uint keynr,uchar *key,uint length); extern int _mi_enlarge_root(MI_INFO *info,uint keynr,uchar *key); extern int _mi_insert(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key, uchar *anc_buff,uchar *key_pos,uchar *key_buff, uchar *father_buff, uchar *father_keypos, my_off_t father_page, my_bool insert_last); extern int _mi_split_page(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key, uchar *buff,uchar *key_buff, my_bool insert_last); extern uchar *_mi_find_half_pos(uint nod_flag,MI_KEYDEF *keyinfo,uchar *page, uchar *key,uint *return_key_length, uchar **after_key); extern int _mi_calc_static_key_length(MI_KEYDEF *keyinfo,uint nod_flag, uchar *key_pos, uchar *org_key, uchar *key_buff, uchar *key, MI_KEY_PARAM *s_temp); extern int _mi_calc_var_key_length(MI_KEYDEF *keyinfo,uint nod_flag, uchar *key_pos, uchar *org_key, uchar *key_buff, uchar *key, MI_KEY_PARAM *s_temp); extern int _mi_calc_var_pack_key_length(MI_KEYDEF *keyinfo,uint nod_flag, uchar *key_pos, uchar *org_key, uchar *prev_key, uchar *key, MI_KEY_PARAM *s_temp); extern int _mi_calc_bin_pack_key_length(MI_KEYDEF *keyinfo,uint nod_flag, uchar *key_pos,uchar *org_key, uchar *prev_key, uchar *key, MI_KEY_PARAM *s_temp); void _mi_store_static_key(MI_KEYDEF *keyinfo, uchar *key_pos, MI_KEY_PARAM *s_temp); void _mi_store_var_pack_key(MI_KEYDEF *keyinfo, uchar *key_pos, MI_KEY_PARAM *s_temp); #ifdef NOT_USED void _mi_store_pack_key(MI_KEYDEF *keyinfo, uchar *key_pos, MI_KEY_PARAM *s_temp); #endif void _mi_store_bin_pack_key(MI_KEYDEF *keyinfo, uchar *key_pos, MI_KEY_PARAM *s_temp); extern int _mi_ck_delete(MI_INFO *info,uint keynr,uchar *key,uint key_length); extern int _mi_readinfo(MI_INFO *info,int lock_flag,int check_keybuffer); extern int _mi_writeinfo(MI_INFO *info,uint options); extern int _mi_test_if_changed(MI_INFO *info); extern int _mi_mark_file_changed(MI_INFO *info); extern int _mi_decrement_open_count(MI_INFO *info); extern int _mi_check_index(MI_INFO *info,int inx); extern int _mi_search(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key,uint key_len, uint nextflag,my_off_t pos); extern int _mi_bin_search(struct st_myisam_info *info,MI_KEYDEF *keyinfo, uchar *page,uchar *key,uint key_len,uint comp_flag, uchar * *ret_pos,uchar *buff, my_bool *was_last_key); extern int _mi_seq_search(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *page, uchar *key,uint key_len,uint comp_flag, uchar **ret_pos,uchar *buff, my_bool *was_last_key); extern int _mi_prefix_search(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *page, uchar *key,uint key_len,uint comp_flag, uchar **ret_pos,uchar *buff, my_bool *was_last_key); extern int _mi_compare_text(CHARSET_INFO *, uchar *, uint, uchar *, uint , my_bool); extern my_off_t _mi_kpos(uint nod_flag,uchar *after_key); extern void _mi_kpointer(MI_INFO *info,uchar *buff,my_off_t pos); extern my_off_t _mi_dpos(MI_INFO *info, uint nod_flag,uchar *after_key); extern my_off_t _mi_rec_pos(MYISAM_SHARE *info, uchar *ptr); extern void _mi_dpointer(MI_INFO *info, uchar *buff,my_off_t pos); extern int _mi_key_cmp(MI_KEYSEG *keyseg, uchar *a,uchar *b, uint key_length,uint nextflag,uint *diff_length); extern uint _mi_get_static_key(MI_KEYDEF *keyinfo,uint nod_flag,uchar * *page, uchar *key); extern uint _mi_get_pack_key(MI_KEYDEF *keyinfo,uint nod_flag,uchar * *page, uchar *key); extern uint _mi_get_binary_pack_key(MI_KEYDEF *keyinfo, uint nod_flag, uchar **page_pos, uchar *key); extern uchar *_mi_get_last_key(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *keypos, uchar *lastkey,uchar *endpos, uint *return_key_length); extern uchar *_mi_get_key(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *page, uchar *key, uchar *keypos, uint *return_key_length); extern uint _mi_keylength(MI_KEYDEF *keyinfo,uchar *key); extern uchar *_mi_move_key(MI_KEYDEF *keyinfo,uchar *to,uchar *from); extern int _mi_search_next(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key, uint key_length,uint nextflag,my_off_t pos); extern int _mi_search_first(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos); extern int _mi_search_last(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos); extern uchar *_mi_fetch_keypage(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t page, uchar *buff,int return_buffer); extern int _mi_write_keypage(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t page, uchar *buff); extern int _mi_dispose(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos); extern my_off_t _mi_new(MI_INFO *info,MI_KEYDEF *keyinfo); extern uint _mi_make_key(MI_INFO *info,uint keynr,uchar *key, const byte *record,my_off_t filepos); extern uint _mi_pack_key(MI_INFO *info,uint keynr,uchar *key,uchar *old, uint key_length); extern int _mi_read_key_record(MI_INFO *info,my_off_t filepos,byte *buf); extern int _mi_read_cache(IO_CACHE *info,byte *buff,my_off_t pos, uint length,int re_read_if_possibly); extern void update_auto_increment(MI_INFO *info,const byte *record); extern byte *mi_fix_rec_buff_for_blob(MI_INFO *info,ulong blob_length); extern ulong _mi_rec_unpack(MI_INFO *info,byte *to,byte *from, ulong reclength); extern my_bool _mi_rec_check(MI_INFO *info,const char *from); extern int _mi_write_part_record(MI_INFO *info,my_off_t filepos,ulong length, my_off_t next_filepos,byte **record, ulong *reclength,int *flag); extern void _mi_print_key(FILE *stream,MI_KEYSEG *keyseg,const uchar *key, uint length); extern my_bool _mi_read_pack_info(MI_INFO *info,pbool fix_keys); extern int _mi_read_pack_record(MI_INFO *info,my_off_t filepos,byte *buf); extern int _mi_read_rnd_pack_record(MI_INFO*, byte *,my_off_t, my_bool); extern int _mi_pack_rec_unpack(MI_INFO *info,byte *to,byte *from, ulong reclength); extern ulonglong mi_safe_mul(ulonglong a,ulonglong b); extern int _mi_ft_update(MI_INFO *info, uint keynr, byte *keybuf, const byte *oldrec, const byte *newrec, my_off_t pos); struct st_sort_info; typedef struct st_mi_block_info { /* Parameter to _mi_get_block_info */ uchar header[MI_BLOCK_INFO_HEADER_LENGTH]; ulong rec_len; ulong data_len; ulong block_len; ulong blob_len; my_off_t filepos; my_off_t next_filepos; my_off_t prev_filepos; uint second_read; uint offset; } MI_BLOCK_INFO; /* bits in return from _mi_get_block_info */ #define BLOCK_FIRST 1 #define BLOCK_LAST 2 #define BLOCK_DELETED 4 #define BLOCK_ERROR 8 /* Wrong data */ #define BLOCK_SYNC_ERROR 16 /* Right data at wrong place */ #define BLOCK_FATAL_ERROR 32 /* hardware-error */ #define NEAD_MEM ((uint) 10*4*(IO_SIZE+32)+32) /* Nead for recursion */ #define MAXERR 20 #define BUFFERS_WHEN_SORTING 16 /* Alloc for sort-key-tree */ #define WRITE_COUNT MY_HOW_OFTEN_TO_WRITE #define INDEX_TMP_EXT ".TMM" #define DATA_TMP_EXT ".TMD" #define UPDATE_TIME 1 #define UPDATE_STAT 2 #define UPDATE_SORT 4 #define UPDATE_AUTO_INC 8 #define UPDATE_OPEN_COUNT 16 #define USE_BUFFER_INIT (((1024L*512L-MALLOC_OVERHEAD)/IO_SIZE)*IO_SIZE) #define READ_BUFFER_INIT (1024L*256L-MALLOC_OVERHEAD) #define SORT_BUFFER_INIT (2048L*1024L-MALLOC_OVERHEAD) #define MIN_SORT_BUFFER (4096-MALLOC_OVERHEAD) enum myisam_log_commands { MI_LOG_OPEN,MI_LOG_WRITE,MI_LOG_UPDATE,MI_LOG_DELETE,MI_LOG_CLOSE,MI_LOG_EXTRA,MI_LOG_LOCK,MI_LOG_DELETE_ALL }; #define myisam_log(a,b,c,d) if (myisam_log_file >= 0) _myisam_log(a,b,c,d) #define myisam_log_command(a,b,c,d,e) if (myisam_log_file >= 0) _myisam_log_command(a,b,c,d,e) #define myisam_log_record(a,b,c,d,e) if (myisam_log_file >= 0) _myisam_log_record(a,b,c,d,e) #ifdef __cplusplus extern "C" { #endif extern uint _mi_get_block_info(MI_BLOCK_INFO *,File, my_off_t); extern uint _mi_rec_pack(MI_INFO *info,byte *to,const byte *from); extern uint _mi_pack_get_block_info(MI_INFO *mysql, MI_BLOCK_INFO *, File, my_off_t, char *rec_buf); extern void _my_store_blob_length(byte *pos,uint pack_length,uint length); extern void _myisam_log(enum myisam_log_commands command,MI_INFO *info, const byte *buffert,uint length); extern void _myisam_log_command(enum myisam_log_commands command, MI_INFO *info, const byte *buffert, uint length, int result); extern void _myisam_log_record(enum myisam_log_commands command,MI_INFO *info, const byte *record,my_off_t filepos, int result); extern my_bool _mi_memmap_file(MI_INFO *info); extern void _mi_unmap_file(MI_INFO *info); extern uint save_pack_length(byte *block_buff,ulong length); uint mi_state_info_write(File file, MI_STATE_INFO *state, uint pWrite); char *mi_state_info_read(char *ptr, MI_STATE_INFO *state); uint mi_state_info_read_dsk(File file, MI_STATE_INFO *state, my_bool pRead); uint mi_base_info_write(File file, MI_BASE_INFO *base); char *my_n_base_info_read(char *ptr, MI_BASE_INFO *base); int mi_keyseg_write(File file, const MI_KEYSEG *keyseg); char *mi_keyseg_read(char *ptr, MI_KEYSEG *keyseg); uint mi_keydef_write(File file, MI_KEYDEF *keydef); char *mi_keydef_read(char *ptr, MI_KEYDEF *keydef); uint mi_uniquedef_write(File file, MI_UNIQUEDEF *keydef); char *mi_uniquedef_read(char *ptr, MI_UNIQUEDEF *keydef); uint mi_recinfo_write(File file, MI_COLUMNDEF *recinfo); char *mi_recinfo_read(char *ptr, MI_COLUMNDEF *recinfo); ulong _my_calc_total_blob_length(MI_INFO *info, const byte *record); ha_checksum mi_checksum(MI_INFO *info, const byte *buf); ha_checksum mi_static_checksum(MI_INFO *info, const byte *buf); my_bool mi_check_unique(MI_INFO *info, MI_UNIQUEDEF *def, byte *record, ha_checksum unique_hash, my_off_t pos); ha_checksum mi_unique_hash(MI_UNIQUEDEF *def, const byte *buf); int _mi_cmp_static_unique(MI_INFO *info, MI_UNIQUEDEF *def, const byte *record, my_off_t pos); int _mi_cmp_dynamic_unique(MI_INFO *info, MI_UNIQUEDEF *def, const byte *record, my_off_t pos); int mi_unique_comp(MI_UNIQUEDEF *def, const byte *a, const byte *b, my_bool null_are_equal); void mi_get_status(void* param); void mi_update_status(void* param); void mi_copy_status(void* to,void *from); my_bool mi_check_status(void* param); void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows); my_bool check_table_is_closed(const char *name, const char *where); int mi_open_datafile(MI_INFO *info, MYISAM_SHARE *share); int mi_open_keyfile(MYISAM_SHARE *share); int _mi_init_bulk_insert(MI_INFO *info); /* Functions needed by mi_check */ void mi_check_print_error _VARARGS((MI_CHECK *param, const char *fmt,...)); void mi_check_print_warning _VARARGS((MI_CHECK *param, const char *fmt,...)); void mi_check_print_info _VARARGS((MI_CHECK *param, const char *fmt,...)); int flush_pending_blocks(MI_CHECK *param); #ifdef __cplusplus } #endif