128 строки
3.1 KiB
C
128 строки
3.1 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* 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 "urldata.h"
|
|
#include "bufref.h"
|
|
#include "strdup.h"
|
|
|
|
#include "curl_memory.h"
|
|
#include "memdebug.h"
|
|
|
|
#define SIGNATURE 0x5c48e9b2 /* Random pattern. */
|
|
|
|
/*
|
|
* Init a bufref struct.
|
|
*/
|
|
void Curl_bufref_init(struct bufref *br)
|
|
{
|
|
DEBUGASSERT(br);
|
|
br->dtor = NULL;
|
|
br->ptr = NULL;
|
|
br->len = 0;
|
|
|
|
#ifdef DEBUGBUILD
|
|
br->signature = SIGNATURE;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Free the buffer and re-init the necessary fields. It does not touch the
|
|
* 'signature' field and thus this buffer reference can be reused.
|
|
*/
|
|
|
|
void Curl_bufref_free(struct bufref *br)
|
|
{
|
|
DEBUGASSERT(br);
|
|
DEBUGASSERT(br->signature == SIGNATURE);
|
|
DEBUGASSERT(br->ptr || !br->len);
|
|
|
|
if(br->ptr && br->dtor)
|
|
br->dtor((void *) br->ptr);
|
|
|
|
br->dtor = NULL;
|
|
br->ptr = NULL;
|
|
br->len = 0;
|
|
}
|
|
|
|
/*
|
|
* Set the buffer reference to new values. The previously referenced buffer
|
|
* is released before assignment.
|
|
*/
|
|
void Curl_bufref_set(struct bufref *br, const void *ptr, size_t len,
|
|
void (*dtor)(void *))
|
|
{
|
|
DEBUGASSERT(ptr || !len);
|
|
DEBUGASSERT(len <= CURL_MAX_INPUT_LENGTH);
|
|
|
|
Curl_bufref_free(br);
|
|
br->ptr = (const unsigned char *) ptr;
|
|
br->len = len;
|
|
br->dtor = dtor;
|
|
}
|
|
|
|
/*
|
|
* Get a pointer to the referenced buffer.
|
|
*/
|
|
const unsigned char *Curl_bufref_ptr(const struct bufref *br)
|
|
{
|
|
DEBUGASSERT(br);
|
|
DEBUGASSERT(br->signature == SIGNATURE);
|
|
DEBUGASSERT(br->ptr || !br->len);
|
|
|
|
return br->ptr;
|
|
}
|
|
|
|
/*
|
|
* Get the length of the referenced buffer data.
|
|
*/
|
|
size_t Curl_bufref_len(const struct bufref *br)
|
|
{
|
|
DEBUGASSERT(br);
|
|
DEBUGASSERT(br->signature == SIGNATURE);
|
|
DEBUGASSERT(br->ptr || !br->len);
|
|
|
|
return br->len;
|
|
}
|
|
|
|
CURLcode Curl_bufref_memdup(struct bufref *br, const void *ptr, size_t len)
|
|
{
|
|
unsigned char *cpy = NULL;
|
|
|
|
DEBUGASSERT(br);
|
|
DEBUGASSERT(br->signature == SIGNATURE);
|
|
DEBUGASSERT(br->ptr || !br->len);
|
|
DEBUGASSERT(ptr || !len);
|
|
DEBUGASSERT(len <= CURL_MAX_INPUT_LENGTH);
|
|
|
|
if(ptr) {
|
|
cpy = Curl_memdup0(ptr, len);
|
|
if(!cpy)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
Curl_bufref_set(br, cpy, len, curl_free);
|
|
return CURLE_OK;
|
|
}
|