Coverage Report

Created: 2025-06-09 07:02

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