101 строка
2.8 KiB
C
101 строка
2.8 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include <curl/curl.h>
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#include "strdup.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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#ifndef HAVE_STRDUP
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char *curlx_strdup(const char *str)
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{
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size_t len;
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char *newstr;
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if(!str)
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return (char *)NULL;
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len = strlen(str);
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if(len >= ((size_t)-1) / sizeof(char))
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return (char *)NULL;
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newstr = malloc((len + 1)*sizeof(char));
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if(!newstr)
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return (char *)NULL;
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memcpy(newstr, str, (len + 1)*sizeof(char));
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return newstr;
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}
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#endif
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/***************************************************************************
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*
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* Curl_memdup(source, length)
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*
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* Copies the 'source' data to a newly allocated buffer (that is
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* returned). Copies 'length' bytes.
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*
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* Returns the new pointer or NULL on failure.
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*
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***************************************************************************/
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void *Curl_memdup(const void *src, size_t length)
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{
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void *buffer = malloc(length);
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if(!buffer)
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return NULL; /* fail */
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memcpy(buffer, src, length);
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return buffer;
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}
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/***************************************************************************
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*
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* Curl_saferealloc(ptr, size)
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*
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* Does a normal realloc(), but will free the data pointer if the realloc
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* fails. If 'size' is zero, it will free the data and return a failure.
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*
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* This convenience function is provided and used to help us avoid a common
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* mistake pattern when we could pass in a zero, catch the NULL return and end
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* up free'ing the memory twice.
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*
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* Returns the new pointer or NULL on failure.
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*
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***************************************************************************/
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void *Curl_saferealloc(void *ptr, size_t size)
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{
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void *datap = realloc(ptr, size);
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if(size && !datap)
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/* only free 'ptr' if size was non-zero */
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free(ptr);
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return datap;
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}
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