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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 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.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#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 *Curl_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_strndup(source, length)
*
* Copies the 'source' string to a newly allocated buffer (that is returned).
* Copies not more than 'length' bytes (up to a null terminator) then adds a
* null terminator.
*
* Returns the new pointer or NULL on failure.
*
***************************************************************************/
void *Curl_strndup(const char *src, size_t length)
{
char *buf = memchr(src, '\0', length);
if(buf)
length = buf - src;
buf = malloc(length + 1);
if(!buf)
return NULL;
memcpy(buf, src, length);
buf[length] = 0;
return buf;
}
/***************************************************************************
*
* 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;
}
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