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/* 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);
};
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