/* * Copyright (C) 2015 The ChromiumOS Authors. All rights reserved. * written by Daisuke Nojiri <dnojiri@chromium.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #ifndef __ARCHIVE_H #define __ARCHIVE_H #include <stdint.h> /* * Archive file layout: * * +----------------------------------+ * | root header | * +----------------------------------+ * | file_header[0] | * +----------------------------------+ * | file_header[1] | * +----------------------------------+ * | ... | * +----------------------------------+ * | file_header[count-1] | * +----------------------------------+ * | file(0) content | * +----------------------------------+ * | file(1) content | * +----------------------------------+ * | ... | * +----------------------------------+ * | file(count-1) content | * +----------------------------------+ */ #define VERSION 0 #define CBAR_MAGIC "CBAR" #define NAME_LENGTH 32 /* Root header */ struct directory { char magic[4]; uint32_t version; /* version of the header. little endian */ uint32_t size; /* total size of archive. little endian */ uint32_t count; /* number of files. little endian */ }; /* File header */ struct dentry { /* file name. null-terminated if shorter than NAME_LENGTH */ char name[NAME_LENGTH]; /* file offset from the root header. little endian */ uint32_t offset; /* file size. little endian */ uint32_t size; }; static inline struct dentry *get_first_dentry(const struct directory *dir) { return (struct dentry *)(dir + 1); } static inline uint32_t get_first_offset(const struct directory *dir) { return sizeof(struct directory) + sizeof(struct dentry) * dir->count; } #endif