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/* Copyright (C) 2000 MySQL 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 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;
int sortcmp(const String *a,const String *b);
int stringcmp(const String *a,const String *b);
String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);
class String
{
char *Ptr;
uint32 str_length,Alloced_length;
bool alloced;
CHARSET_INFO *str_charset;
public:
String()
{
Ptr=0; str_length=Alloced_length=0; alloced=0;
str_charset= &my_charset_latin1;
}
String(uint32 length_arg)
{
alloced=0; Alloced_length=0; (void) real_alloc(length_arg);
str_charset= &my_charset_latin1;
}
String(const char *str, CHARSET_INFO *cs)
{
Ptr=(char*) str; str_length=(uint) strlen(str); Alloced_length=0; alloced=0;
str_charset=cs;
}
String(const char *str,uint32 len, CHARSET_INFO *cs)
{
Ptr=(char*) str; str_length=len; Alloced_length=0; alloced=0;
str_charset=cs;
}
String(char *str,uint32 len, CHARSET_INFO *cs)
{
Ptr=(char*) str; Alloced_length=str_length=len; alloced=0;
str_charset=cs;
}
String(const String &str)
{
Ptr=str.Ptr ; str_length=str.str_length ;
Alloced_length=str.Alloced_length; alloced=0;
str_charset=str.str_charset;
}
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 void set_charset(CHARSET_INFO *charset) { str_charset=charset; }
inline CHARSET_INFO *charset() const { return str_charset; }
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;
}
inline char *c_ptr_safe()
{
if (Ptr && str_length < Alloced_length)
Ptr[str_length]=0;
else
(void) realloc(str_length);
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;
str_charset=str.str_charset;
}
inline void set(char *str,uint32 arg_length, CHARSET_INFO *cs)
{
free();
Ptr=(char*) str; str_length=Alloced_length=arg_length ; alloced=0;
str_charset=cs;
}
inline void set(const char *str,uint32 arg_length, CHARSET_INFO *cs)
{
free();
Ptr=(char*) str; str_length=arg_length; Alloced_length=0 ; alloced=0;
str_charset=cs;
}
inline void set_quick(char *str,uint32 arg_length, CHARSET_INFO *cs)
{
if (!alloced)
{
Ptr=(char*) str; str_length=Alloced_length=arg_length;
}
str_charset=cs;
}
bool set(longlong num, CHARSET_INFO *cs);
bool set(ulonglong num, CHARSET_INFO *cs);
bool set(double num,uint decimals, CHARSET_INFO *cs);
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, CHARSET_INFO *cs); // Allocate new string
bool copy(const char*s,uint32 arg_length, CHARSET_INFO *csfrom, CHARSET_INFO *csto);
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 strstr_case(const String &s,uint32 offset=0);
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() { my_caseup(str_charset,Ptr,str_length); }
inline void casedn() { my_casedn(str_charset,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);
uint32 numchars();
int charpos(int i,uint32 offset=0);
int reserve(uint32 space_needed)
{
return realloc(str_length + space_needed);
}
int reserve(uint32 space_needed, uint32 grow_by);
/*
The following append operations do NOT check alloced memory
q_*** methods writes values of parameters itself
qs_*** methods writes string representation of value
*/
void q_append(const char &c)
{
Ptr[str_length++] = c;
}
void q_append(const uint32 &n)
{
int4store(Ptr + str_length, n);
str_length += 4;
}
void q_append(double d)
{
float8store(Ptr + str_length, d);
str_length += 8;
}
void q_append(double *d)
{
float8store(Ptr + str_length, *d);
str_length += 8;
}
void q_append(const char *data, uint32 data_len)
{
memcpy(Ptr + str_length, data, data_len);
str_length += data_len;
}
void WriteAtPosition(int position, uint32 value)
{
int4store(Ptr + position,value);
}
void qs_append(const char *str);
void qs_append(double d);
void qs_append(double *d);
void qs_append(const char &c);
};
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