You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.2 KiB
63 lines
2.2 KiB
/* |
|
* Copyright (C) 2010 The Android Open Source Project |
|
* |
|
* Licensed under the Apache License, Version 2.0 (the "License"); |
|
* you may not use this file except in compliance with the License. |
|
* You may obtain a copy of the License at |
|
* |
|
* http://www.apache.org/licenses/LICENSE-2.0 |
|
* |
|
* Unless required by applicable law or agreed to in writing, software |
|
* distributed under the License is distributed on an "AS IS" BASIS, |
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
* See the License for the specific language governing permissions and |
|
* limitations under the License. |
|
*/ |
|
|
|
#ifndef _LIBSPARSE_SPARSE_FORMAT_H_ |
|
#define _LIBSPARSE_SPARSE_FORMAT_H_ |
|
#include "sparse_defs.h" |
|
|
|
#ifdef __cplusplus |
|
extern "C" { |
|
#endif |
|
|
|
typedef struct sparse_header { |
|
__le32 magic; /* 0xed26ff3a */ |
|
__le16 major_version; /* (0x1) - reject images with higher major versions */ |
|
__le16 minor_version; /* (0x0) - allow images with higer minor versions */ |
|
__le16 file_hdr_sz; /* 28 bytes for first revision of the file format */ |
|
__le16 chunk_hdr_sz; /* 12 bytes for first revision of the file format */ |
|
__le32 blk_sz; /* block size in bytes, must be a multiple of 4 (4096) */ |
|
__le32 total_blks; /* total blocks in the non-sparse output image */ |
|
__le32 total_chunks; /* total chunks in the sparse input image */ |
|
__le32 image_checksum; /* CRC32 checksum of the original data, counting "don't care" */ |
|
/* as 0. Standard 802.3 polynomial, use a Public Domain */ |
|
/* table implementation */ |
|
} sparse_header_t; |
|
|
|
#define SPARSE_HEADER_MAGIC 0xed26ff3a |
|
|
|
#define CHUNK_TYPE_RAW 0xCAC1 |
|
#define CHUNK_TYPE_FILL 0xCAC2 |
|
#define CHUNK_TYPE_DONT_CARE 0xCAC3 |
|
#define CHUNK_TYPE_CRC32 0xCAC4 |
|
|
|
typedef struct chunk_header { |
|
__le16 chunk_type; /* 0xCAC1 -> raw; 0xCAC2 -> fill; 0xCAC3 -> don't care */ |
|
__le16 reserved1; |
|
__le32 chunk_sz; /* in blocks in output image */ |
|
__le32 total_sz; /* in bytes of chunk input file including chunk header and data */ |
|
} chunk_header_t; |
|
|
|
/* Following a Raw or Fill or CRC32 chunk is data. |
|
* For a Raw chunk, it's the data in chunk_sz * blk_sz. |
|
* For a Fill chunk, it's 4 bytes of the fill data. |
|
* For a CRC32 chunk, it's 4 bytes of CRC32 |
|
*/ |
|
|
|
#ifdef __cplusplus |
|
} |
|
#endif |
|
|
|
#endif
|
|
|