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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
2016 MariaDB Corporation 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., 51 Franklin Street, Fifth Floor, Boston,
MA 02111-1301, USA */
/*
Code for handling strings with can grow dynamicly.
Copyright Monty Program KB.
By monty.
*/
#include <ma_global.h>
#include <ma_sys.h>
#include <ma_string.h>
my_bool ma_init_dynamic_string(DYNAMIC_STRING *str, const char *init_str,
size_t init_alloc, size_t alloc_increment)
{
uint length;
if (!alloc_increment)
alloc_increment=128;
length=1;
if (init_str && (length= (uint) strlen(init_str)+1) < init_alloc)
init_alloc=((length+alloc_increment-1)/alloc_increment)*alloc_increment;
if (!init_alloc)
init_alloc=alloc_increment;
if (!(str->str=(char*) malloc(init_alloc)))
return(TRUE);
str->length=length-1;
if (init_str)
memcpy(str->str,init_str,length);
str->max_length=init_alloc;
str->alloc_increment=alloc_increment;
return(FALSE);
}
my_bool ma_dynstr_set(DYNAMIC_STRING *str, const char *init_str)
{
uint length;
if (init_str && (length= (uint) strlen(init_str)+1) > str->max_length)
{
str->max_length=((length+str->alloc_increment-1)/str->alloc_increment)*
str->alloc_increment;
if (!str->max_length)
str->max_length=str->alloc_increment;
if (!(str->str=(char*) realloc(str->str,str->max_length)))
return(TRUE);
}
if (init_str)
{
str->length=length-1;
memcpy(str->str,init_str,length);
}
else
str->length=0;
return(FALSE);
}
my_bool ma_dynstr_realloc(DYNAMIC_STRING *str, size_t additional_size)
{
if (!additional_size) return(FALSE);
if (str->length + additional_size > str->max_length)
{
str->max_length=((str->length + additional_size+str->alloc_increment-1)/
str->alloc_increment)*str->alloc_increment;
if (!(str->str=(char*) realloc(str->str,str->max_length)))
return(TRUE);
}
return(FALSE);
}
my_bool ma_dynstr_append(DYNAMIC_STRING *str, const char *append)
{
return ma_dynstr_append_mem(str,append,strlen(append));
}
my_bool ma_dynstr_append_mem(DYNAMIC_STRING *str, const char *append,
size_t length)
{
char *new_ptr;
if (str->length+length >= str->max_length)
{
size_t new_length=(str->length+length+str->alloc_increment)/
str->alloc_increment;
new_length*=str->alloc_increment;
if (!(new_ptr=(char*) realloc(str->str,new_length)))
return TRUE;
str->str=new_ptr;
str->max_length=new_length;
}
memcpy(str->str + str->length,append,length);
str->length+=length;
str->str[str->length]=0; /* Safety for C programs */
return FALSE;
}
void ma_dynstr_free(DYNAMIC_STRING *str)
{
if (str->str)
{
free(str->str);
str->str=0;
}
}
char *ma_strmake(register char *dst, register const char *src, size_t length)
{
while (length--)
if (! (*dst++ = *src++))
return dst-1;
*dst=0;
return dst;
}
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