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