| Daisuke Nojiri | 6d2c722 | 2015-11-05 10:05:38 -0800 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2015 The ChromiumOS Authors. All rights reserved. |
| 5 | * written by Daisuke Nojiri <dnojiri@chromium.org> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #ifndef __ARCHIVE_H |
| 32 | #define __ARCHIVE_H |
| 33 | |
| 34 | #include <stdint.h> |
| 35 | |
| 36 | /* |
| 37 | * Archive file layout: |
| 38 | * |
| 39 | * +----------------------------------+ |
| 40 | * | root header | |
| 41 | * +----------------------------------+ |
| 42 | * | file_header[0] | |
| 43 | * +----------------------------------+ |
| 44 | * | file_header[1] | |
| 45 | * +----------------------------------+ |
| 46 | * | ... | |
| 47 | * +----------------------------------+ |
| 48 | * | file_header[count-1] | |
| 49 | * +----------------------------------+ |
| 50 | * | file(0) content | |
| 51 | * +----------------------------------+ |
| 52 | * | file(1) content | |
| 53 | * +----------------------------------+ |
| 54 | * | ... | |
| 55 | * +----------------------------------+ |
| 56 | * | file(count-1) content | |
| 57 | * +----------------------------------+ |
| 58 | */ |
| 59 | |
| 60 | #define VERSION 0 |
| 61 | #define CBAR_MAGIC "CBAR" |
| 62 | #define NAME_LENGTH 32 |
| 63 | |
| 64 | /* Root header */ |
| 65 | struct directory { |
| 66 | char magic[4]; |
| 67 | uint32_t version; /* version of the header. little endian */ |
| 68 | uint32_t size; /* total size of archive. little endian */ |
| 69 | uint32_t count; /* number of files. little endian */ |
| 70 | }; |
| 71 | |
| 72 | /* File header */ |
| 73 | struct dentry { |
| 74 | /* file name. null-terminated if shorter than NAME_LENGTH */ |
| 75 | char name[NAME_LENGTH]; |
| 76 | /* file offset from the root header. little endian */ |
| 77 | uint32_t offset; |
| 78 | /* file size. little endian */ |
| 79 | uint32_t size; |
| 80 | }; |
| 81 | |
| 82 | static inline struct dentry *get_first_dentry(const struct directory *dir) |
| 83 | { |
| 84 | return (struct dentry *)(dir + 1); |
| 85 | } |
| 86 | |
| 87 | static inline uint32_t get_first_offset(const struct directory *dir) |
| 88 | { |
| 89 | return sizeof(struct directory) + sizeof(struct dentry) * dir->count; |
| 90 | } |
| 91 | |
| 92 | #endif |