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Diffstat (limited to 'client/sql_string.h')
| -rw-r--r-- | client/sql_string.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/client/sql_string.h b/client/sql_string.h new file mode 100644 index 00000000000..56a0a9b4eb2 --- /dev/null +++ b/client/sql_string.h @@ -0,0 +1,183 @@ +/* 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=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(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; + } + } + + 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=my_realloc(Ptr,arg_length,MYF(0)))) + { + (void) my_free(Ptr,MYF(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); + 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); +}; |