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