sparkey_returncode sparkey_load_hashheader()

in src/hashheader.c [79:110]

• 31 lines of code
• 6 McCabe index (conditional complexity)

sparkey_returncode sparkey_load_hashheader(sparkey_hashheader *header, const char *filename) {
	FILE *fp = fopen(filename, "r");
	if (fp == NULL) {
		return sparkey_open_returncode(errno);
	}

	uint32_t tmp;
	RETHROW(fread_little_endian32(fp, &tmp));
	if (tmp != HASH_MAGIC_NUMBER) {
		fclose(fp);
		return SPARKEY_WRONG_HASH_MAGIC_NUMBER;
	}
	RETHROW(fread_little_endian32(fp, &header->major_version));
	if (header->major_version != HASH_MAJOR_VERSION) {
		fclose(fp);
		return SPARKEY_WRONG_HASH_MAJOR_VERSION;
	}
	RETHROW(fread_little_endian32(fp, &header->minor_version));
	if (header->minor_version > HASH_MINOR_VERSION) {
		fclose(fp);
		return SPARKEY_UNSUPPORTED_HASH_MINOR_VERSION;
	}
	int version = header->minor_version;
	loader l = loaders[version];
	if (l == NULL) {
		fclose(fp);
		return SPARKEY_INTERNAL_ERROR;
	}
	sparkey_returncode x = (*l)(header, fp);
	fclose(fp);
	return x;
}