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/*
* Copyright © 2013 Ran Benita <ran234@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "utils.h"
#ifdef HAVE_MMAP
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
bool
map_file(FILE *file, const char **string_out, size_t *size_out)
{
struct stat stat_buf;
const int fd = fileno(file);
char *string;
/* Make sure to keep the errno on failure! */
if (fstat(fd, &stat_buf) != 0)
return false;
string = mmap(NULL, stat_buf.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (string == MAP_FAILED)
return false;
*string_out = string;
*size_out = stat_buf.st_size;
return true;
}
void
unmap_file(const char *str, size_t size)
{
munmap(UNCONSTIFY(str), size);
}
#else
bool
map_file(FILE *file, const char **string_out, size_t *size_out)
{
long ret;
size_t ret_s;
char *string;
size_t size;
/* Make sure to keep the errno on failure! */
ret = fseek(file, 0, SEEK_END);
if (ret != 0)
return false;
ret = ftell(file);
if (ret < 0)
return false;
size = (size_t) ret;
ret = fseek(file, 0, SEEK_SET);
if (ret < 0)
return false;
string = malloc(size);
if (!string)
return false;
ret_s = fread(string, 1, size, file);
if (ret_s < size) {
free(string);
return false;
}
*string_out = string;
*size_out = size;
return true;
}
void
unmap_file(const char *str, size_t size)
{
free(UNCONSTIFY(str));
}
#endif
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