Page History

enum { NO_FILE_POS_VALUES = 3 };

errno_t opener(FILE* file, unsigned int *width, unsigned int *height, unsigned int *data_offset) {
  unsigned int file_w;
  unsigned int file_h;
  unsigned int file_o;
  int rc;
  fpos_t offset;

  memset(&offset, 0, sizeof(offset));

  if (file == NULL) { return EINVAL; }
  if (fscanf(file, "%i%u %i%u %i%u", &file_w, &file_h, &file_o)  != NO_FILE_POS_VALUES) { return EIO; }
  if ((rc = fsetpos(file, &offset)) != 0 ) { return rc; }

  *width = file_w;
  *height = file_h;
  *data_offset = file_o;

  return 0;
}

enum { NO_FILE_POS_VALUES = 3 };

errno_t opener(FILE* file, unsigned int *width, unsigned int *height, unsigned int *data_offset) {
  unsigned int file_w;
  unsigned int file_h;
  unsigned int file_o;
  int rc;
  fpos_t offset;

  if (file == NULL) { return EINVAL; }
  if ((rc = fgetpos(file, &offset)) != 0 ) { return rc; }
  if (fscanf(file, "%i%u %i%u %i%u", &file_w, &file_h, &file_o)  != NO_FILE_POS_VALUES) { return EIO; }
  if ((rc = fsetpos(file, &offset)) != 0 ) { return rc; }

  *width = file_w;
  *height = file_h;
  *data_offset = file_o;

  return 0;
}