/* * * Copyright (C) 2015 The ChromiumOS Authors. All rights reserved. * written by Daisuke Nojiri <dnojiri@chromium.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #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