1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 #ifndef __ARCHIVE_H 4 #define __ARCHIVE_H 5 6 #include <stdint.h> 7 8 /* 9 * Archive file layout: 10 * 11 * +----------------------------------+ 12 * | root header | 13 * +----------------------------------+ 14 * | file_header[0] | 15 * +----------------------------------+ 16 * | file_header[1] | 17 * +----------------------------------+ 18 * | ... | 19 * +----------------------------------+ 20 * | file_header[count-1] | 21 * +----------------------------------+ 22 * | file(0) content | 23 * +----------------------------------+ 24 * | file(1) content | 25 * +----------------------------------+ 26 * | ... | 27 * +----------------------------------+ 28 * | file(count-1) content | 29 * +----------------------------------+ 30 */ 31 32 #define VERSION 0 33 #define CBAR_MAGIC "CBAR" 34 #define NAME_LENGTH 32 35 36 /* Root header */ 37 struct directory { 38 char magic[4]; 39 uint32_t version; /* version of the header. little endian */ 40 uint32_t size; /* total size of archive. little endian */ 41 uint32_t count; /* number of files. little endian */ 42 }; 43 44 /* File header */ 45 struct dentry { 46 /* file name. null-terminated if shorter than NAME_LENGTH */ 47 char name[NAME_LENGTH]; 48 /* file offset from the root header. little endian */ 49 uint32_t offset; 50 /* file size. little endian */ 51 uint32_t size; 52 }; 53 get_first_dentry(const struct directory * dir)54static inline struct dentry *get_first_dentry(const struct directory *dir) 55 { 56 return (struct dentry *)(dir + 1); 57 } 58 get_first_offset(const struct directory * dir)59static inline uint32_t get_first_offset(const struct directory *dir) 60 { 61 return sizeof(struct directory) + sizeof(struct dentry) * dir->count; 62 } 63 64 #endif 65