mirror of
https://github.com/curl/curl.git
synced 2024-12-27 06:59:43 +08:00
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "curl_setup.h"
|
|
|
|
#include <curl/curl.h>
|
|
|
|
#ifdef WIN32
|
|
#include <wchar.h>
|
|
#endif
|
|
|
|
#include "strdup.h"
|
|
#include "curl_memory.h"
|
|
|
|
/* The last #include file should be: */
|
|
#include "memdebug.h"
|
|
|
|
#ifndef HAVE_STRDUP
|
|
char *curlx_strdup(const char *str)
|
|
{
|
|
size_t len;
|
|
char *newstr;
|
|
|
|
if(!str)
|
|
return (char *)NULL;
|
|
|
|
len = strlen(str) + 1;
|
|
|
|
newstr = malloc(len);
|
|
if(!newstr)
|
|
return (char *)NULL;
|
|
|
|
memcpy(newstr, str, len);
|
|
return newstr;
|
|
}
|
|
#endif
|
|
|
|
#ifdef WIN32
|
|
/***************************************************************************
|
|
*
|
|
* Curl_wcsdup(source)
|
|
*
|
|
* Copies the 'source' wchar string to a newly allocated buffer (that is
|
|
* returned).
|
|
*
|
|
* Returns the new pointer or NULL on failure.
|
|
*
|
|
***************************************************************************/
|
|
wchar_t *Curl_wcsdup(const wchar_t *src)
|
|
{
|
|
size_t length = wcslen(src);
|
|
|
|
if(length > (SIZE_T_MAX / sizeof(wchar_t)) - 1)
|
|
return (wchar_t *)NULL; /* integer overflow */
|
|
|
|
return (wchar_t *)Curl_memdup(src, (length + 1) * sizeof(wchar_t));
|
|
}
|
|
#endif
|
|
|
|
/***************************************************************************
|
|
*
|
|
* Curl_memdup(source, length)
|
|
*
|
|
* Copies the 'source' data to a newly allocated buffer (that is
|
|
* returned). Copies 'length' bytes.
|
|
*
|
|
* Returns the new pointer or NULL on failure.
|
|
*
|
|
***************************************************************************/
|
|
void *Curl_memdup(const void *src, size_t length)
|
|
{
|
|
void *buffer = malloc(length);
|
|
if(!buffer)
|
|
return NULL; /* fail */
|
|
|
|
memcpy(buffer, src, length);
|
|
|
|
return buffer;
|
|
}
|
|
|
|
/***************************************************************************
|
|
*
|
|
* Curl_saferealloc(ptr, size)
|
|
*
|
|
* Does a normal realloc(), but will free the data pointer if the realloc
|
|
* fails. If 'size' is non-zero, it will free the data and return a failure.
|
|
*
|
|
* This convenience function is provided and used to help us avoid a common
|
|
* mistake pattern when we could pass in a zero, catch the NULL return and end
|
|
* up free'ing the memory twice.
|
|
*
|
|
* Returns the new pointer or NULL on failure.
|
|
*
|
|
***************************************************************************/
|
|
void *Curl_saferealloc(void *ptr, size_t size)
|
|
{
|
|
void *datap = realloc(ptr, size);
|
|
if(size && !datap)
|
|
/* only free 'ptr' if size was non-zero */
|
|
free(ptr);
|
|
return datap;
|
|
}
|