Sweden-Number/dlls/jscript/jsstr.c

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/*
* Copyright 2012 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "jscript.h"
#include "wine/debug.h"
const char *debugstr_jsstr(jsstr_t *str)
{
return debugstr_wn(str->str, jsstr_length(str));
}
jsstr_t *jsstr_alloc_buf(unsigned len)
{
jsstr_t *ret;
if(len > JSSTR_MAX_LENGTH)
return NULL;
ret = heap_alloc(FIELD_OFFSET(jsstr_t, str[len+1]));
if(!ret)
return NULL;
ret->length_flags = len << JSSTR_LENGTH_SHIFT;
ret->ref = 1;
ret->str[len] = 0;
return ret;
}
jsstr_t *jsstr_alloc_len(const WCHAR *buf, unsigned len)
{
jsstr_t *ret;
ret = jsstr_alloc_buf(len);
if(ret)
memcpy(ret->str, buf, len*sizeof(WCHAR));
return ret;
}
int jsstr_cmp(jsstr_t *str1, jsstr_t *str2)
{
int len1 = jsstr_length(str1);
int len2 = jsstr_length(str2);
int ret;
ret = memcmp(str1->str, str2->str, min(len1, len2)*sizeof(WCHAR));
if(!ret)
ret = len1 - len2;
return ret;
}
jsstr_t *jsstr_concat(jsstr_t *str1, jsstr_t *str2)
{
unsigned len1, len2;
jsstr_t *ret;
len1 = jsstr_length(str1);
if(!len1)
return jsstr_addref(str2);
len2 = jsstr_length(str2);
if(!len2)
return jsstr_addref(str1);
ret = jsstr_alloc_buf(len1+len2);
if(!ret)
return NULL;
memcpy(ret->str, str1->str, len1*sizeof(WCHAR));
memcpy(ret->str+len1, str2->str, len2*sizeof(WCHAR));
return ret;
}
static jsstr_t *empty_str, *nan_str;
jsstr_t *jsstr_nan(void)
{
return jsstr_addref(nan_str);
}
jsstr_t *jsstr_empty(void)
{
return jsstr_addref(empty_str);
}
BOOL init_strings(void)
{
static const WCHAR NaNW[] = { 'N','a','N',0 };
if(!(empty_str = jsstr_alloc_buf(0)))
return FALSE;
if(!(nan_str = jsstr_alloc(NaNW)))
return FALSE;
return TRUE;
}
void free_strings(void)
{
jsstr_release(empty_str);
jsstr_release(nan_str);
}