mirror of
https://github.com/curl/curl.git
synced 2026-08-24 17:43:32 +03:00
c4013cdb85
- 'null-terminate', sync casing. - add an `#endif` comment. - avoid a few instances of 'will'. - configure: 'aws' -> 'aws-sigv4', where missing. - unfold/fold lines. - update memzero/strzero comments. - uppercase 'CRLF'. Closes #22443
123 lines
3.5 KiB
C
123 lines
3.5 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) 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.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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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef _WIN32
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#include <wchar.h>
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#endif
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#include "curlx/strdup.h"
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#ifdef _WIN32
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/***************************************************************************
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*
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* curlx_wcsdup(source)
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*
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* Copies the 'source' wchar string to a newly allocated buffer (that is
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* returned). Used by macro curlx_tcsdup().
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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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wchar_t *curlx_wcsdup(const wchar_t *src)
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{
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size_t length = wcslen(src);
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if(length > (SIZE_MAX / sizeof(wchar_t)) - 1)
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return (wchar_t *)NULL; /* integer overflow */
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return (wchar_t *)curlx_memdup(src, (length + 1) * sizeof(wchar_t));
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}
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#endif
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/***************************************************************************
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*
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* curlx_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 *curlx_memdup(const void *src, size_t length)
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{
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void *buffer = curlx_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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* curlx_memdup0(source, length)
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*
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* Copies the 'source' string to a newly allocated buffer (that is returned).
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* Copies 'length' bytes then adds a null-terminator.
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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 *curlx_memdup0(const char *src, size_t length)
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{
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char *buf = (length < SIZE_MAX) ? curlx_malloc(length + 1) : NULL;
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if(!buf)
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return NULL;
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if(length) {
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DEBUGASSERT(src); /* must never be NULL */
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memcpy(buf, src, length);
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}
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buf[length] = 0;
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return buf;
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}
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#ifdef USE_CURLX_MEMZERO
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static void *(* const volatile p_curlx_memset)(void *buf, int val,
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size_t size) = memset;
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/* Local fallback in case there is no system function to securely zero a memory
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buffer. */
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void curlx_memzero_low(void *buf, size_t size)
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{
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if(buf)
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p_curlx_memset(buf, 0, size);
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}
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#endif
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/* Fill 'buf' with zeroes. */
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void curlx_memzero(void *buf, size_t size)
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{
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if(buf)
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curlx_memzero_low(buf, size);
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}
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/* Fill 'buf' with zeroes, where 'buf' is null-terminated. */
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void curlx_strzero(void *buf)
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{
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if(buf)
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curlx_memzero_low(buf, strlen(buf));
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}
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