/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ /* This file is originally from the mysql distribution. Coded by monty */ #ifdef __GNUC__ #pragma interface /* gcc class implementation */ #endif #ifndef NOT_FIXED_DEC #define NOT_FIXED_DEC 31 #endif class String { char *Ptr; uint32 str_length,Alloced_length; bool alloced; public: String() { Ptr=0; str_length=Alloced_length=0; alloced=0; } String(uint32 length_arg) { alloced=0; Alloced_length=0; (void) real_alloc(length_arg); } String(const char *str) { Ptr=(char*) str; str_length=(uint) strlen(str); Alloced_length=0; alloced=0;} String(const char *str,uint32 len) { Ptr=(char*) str; str_length=len; Alloced_length=0; alloced=0;} String(char *str,uint32 len) { Ptr=(char*) str; Alloced_length=str_length=len; alloced=0;} String(const String &str) { Ptr=str.Ptr ; str_length=str.str_length ; Alloced_length=str.Alloced_length; alloced=0; } static void *operator new(size_t size) { return (void*) sql_alloc((uint) size); } static void operator delete(void *ptr_arg,size_t size) /*lint -e715 */ { sql_element_free(ptr_arg); } ~String() { free(); } inline uint32 length() const { return str_length;} inline uint32 alloced_length() const { return Alloced_length;} inline char& operator [] (uint32 i) const { return Ptr[i]; } inline void length(uint32 len) { str_length=len ; } inline bool is_empty() { return (str_length == 0); } inline const char *ptr() const { return Ptr; } inline char *c_ptr() { if (!Ptr || Ptr[str_length]) /* Should be safe */ (void) realloc(str_length); return Ptr; } inline char *c_ptr_quick() { if (Ptr && str_length < Alloced_length) Ptr[str_length]=0; return Ptr; } void set(String &str,uint32 offset,uint32 arg_length) { free(); Ptr=(char*) str.ptr()+offset; str_length=arg_length; alloced=0; if (str.Alloced_length) Alloced_length=str.Alloced_length-offset; else Alloced_length=0; } inline void set(char *str,uint32 arg_length) { free(); Ptr=(char*) str; str_length=Alloced_length=arg_length ; alloced=0; } inline void set(const char *str,uint32 arg_length) { free(); Ptr=(char*) str; str_length=arg_length; Alloced_length=0 ; alloced=0; } inline void set_quick(char *str,uint32 arg_length) { if (!alloced) { Ptr=(char*) str; str_length=Alloced_length=arg_length; } } bool set(longlong num); /* bool set(long num); */ bool set(ulonglong num); bool set(double num,uint decimals=2); inline void free() { if (alloced) { alloced=0; Alloced_length=0; my_free(Ptr,MYF(0)); Ptr=0; str_length=0; /* Safety */ } } inline bool alloc(uint32 arg_length) { if (arg_length < Alloced_length) return 0; return real_alloc(arg_length); } bool real_alloc(uint32 arg_length); // Empties old string bool realloc(uint32 arg_length); inline void shrink(uint32 arg_length) // Shrink buffer { if (arg_length < Alloced_length) { char *new_ptr; if (!(new_ptr=(char*) my_realloc(Ptr,arg_length,MYF(0)))) { Alloced_length = 0; real_alloc(arg_length); } else { Ptr=new_ptr; Alloced_length=arg_length; } } } bool is_alloced() { return alloced; } inline String& operator = (const String &s) { if (&s != this) { free(); Ptr=s.Ptr ; str_length=s.str_length ; Alloced_length=s.Alloced_length; alloced=0; } return *this; } bool copy(); // Alloc string if not alloced bool copy(const String &s); // Allocate new string bool copy(const char *s,uint32 arg_length); // Allocate new string bool append(const String &s); bool append(const char *s,uint32 arg_length=0); bool append(IO_CACHE* file, uint32 arg_length); int strstr(const String &search,uint32 offset=0); // Returns offset to substring or -1 int strrstr(const String &search,uint32 offset=0); // Returns offset to substring or -1 bool replace(uint32 offset,uint32 arg_length,const String &to); inline bool append(char chr) { if (str_length < Alloced_length) { Ptr[str_length++]=chr; } else { if (realloc(str_length+1)) return 1; Ptr[str_length++]=chr; } return 0; } bool fill(uint32 max_length,char fill); void strip_sp(); inline void caseup() { ::caseup(Ptr,str_length); } inline void casedn() { ::casedn(Ptr,str_length); } friend int sortcmp(const String *a,const String *b); friend int stringcmp(const String *a,const String *b); friend String *copy_if_not_alloced(String *a,String *b,uint32 arg_length); friend int wild_case_compare(String &match,String &wild,char escape); friend int wild_compare(String &match,String &wild,char escape); uint32 numchars(); int charpos(int i,uint32 offset=0); };