mjs-sys 0.1.2

/*
 * Copyright (c) 2014-2018 Cesanta Software Limited
 * All rights reserved
 *
 * Licensed under the Apache License, Version 2.0 (the ""License"");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an ""AS IS"" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "common/cs_file.h"

#include <stdio.h>
#include <stdlib.h>

#ifdef CS_MMAP
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#endif

#ifndef EXCLUDE_COMMON
char *cs_read_file(const char *path, size_t *size) WEAK;
char *cs_read_file(const char *path, size_t *size) {
  FILE *fp;
  char *data = NULL;
  if ((fp = fopen(path, "rb")) == NULL) {
  } else if (fseek(fp, 0, SEEK_END) != 0) {
    fclose(fp);
  } else {
    *size = ftell(fp);
    data = (char *) malloc(*size + 1);
    if (data != NULL) {
      fseek(fp, 0, SEEK_SET); /* Some platforms might not have rewind(), Oo */
      if (fread(data, 1, *size, fp) != *size) {
        free(data);
        return NULL;
      }
      data[*size] = '\0';
    }
    fclose(fp);
  }
  return data;
}
#endif /* EXCLUDE_COMMON */

#ifdef CS_MMAP
char *cs_mmap_file(const char *path, size_t *size) WEAK;
char *cs_mmap_file(const char *path, size_t *size) {
  char *r;
  int fd = open(path, O_RDONLY, 0);
  struct stat st;
  if (fd < 0) return NULL;
  fstat(fd, &st);
  *size = (size_t) st.st_size;
  r = (char *) mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
  if (r == MAP_FAILED) return NULL;
  return r;
}
#endif