diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/sqfs/block.h | 140 | ||||
| -rw-r--r-- | include/sqfs/data_writer.h | 109 |
2 files changed, 140 insertions, 109 deletions
diff --git a/include/sqfs/block.h b/include/sqfs/block.h new file mode 100644 index 0000000..5216fd7 --- /dev/null +++ b/include/sqfs/block.h @@ -0,0 +1,140 @@ +/* SPDX-License-Identifier: LGPL-3.0-or-later */ +/* + * block.h - This file is part of libsquashfs + * + * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published + * by the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ +#ifndef SQFS_BLOCK_H +#define SQFS_BLOCK_H + +#include "sqfs/predef.h" + +/** + * @file block.h + * + * @brief Contains the definition of the @ref sqfs_block_t data structure. + */ + +/** + * @enum E_SQFS_BLK_FLAGS + * + * @brief Generic flags that tell the processor what to do with a block and + * flags that the processor sets when it is done with a block. + */ +typedef enum { + /** + * @brief Only calculate checksum, do NOT compress the data. + */ + SQFS_BLK_DONT_COMPRESS = 0x0001, + + /** + * @brief Indicates that an equeued block is the first block of a file. + */ + SQFS_BLK_FIRST_BLOCK = 0x0002, + + /** + * @brief Indicates that an equeued block is the last block of a file. + */ + SQFS_BLK_LAST_BLOCK = 0x0004, + + /** + * @brief Allign the block on disk to device block size. + * + * If set in combination with @ref SQFS_BLK_FIRST_BLOCK, the output + * file is padded to a multiple of the device block size before writing + * the block. + * + * If used with @ref SQFS_BLK_LAST_BLOCK, the output file is padded + * after writing the block. + */ + SQFS_BLK_ALLIGN = 0x0008, + + /** + * @brief Indicates that a block is a tail end of a file and the block + * processor should take care of fragment packing and accounting. + */ + SQFS_BLK_IS_FRAGMENT = 0x0010, + + /** + * @brief Set by the block processor on fragment blocks that + * it generates. + */ + SQFS_BLK_FRAGMENT_BLOCK = 0x4000, + + /** + * @brief Set by compressor worker if the block was actually compressed. + */ + SQFS_BLK_IS_COMPRESSED = 0x8000, + + /** + * @brief The combination of all flags that are user settable. + */ + SQFS_BLK_USER_SETTABLE_FLAGS = 0x001F, +} E_SQFS_BLK_FLAGS; + +/** + * @struct sqfs_block_t + * + * @brief Encapsulates a chunk of data to be processed by the block processor. + */ +struct sqfs_block_t { + /** + * @brief Used internally, existing value is ignored and overwritten + * when enqueueing a block. + */ + sqfs_block_t *next; + + /** + * @brief Used internally, existing value is ignored and overwritten + * when enqueueing a block. + */ + uint32_t sequence_number; + + /** + * @brief Size of the data area. + */ + uint32_t size; + + /** + * @brief Checksum of the input data. + */ + uint32_t checksum; + + /** + * @brief Data block index within the inode. + */ + uint32_t index; + + /** + * @brief The squashfs inode related to this block. + */ + sqfs_inode_generic_t *inode; + + /** + * @brief User settable flag field. + * + * A combination of @ref E_SQFS_BLK_FLAGS and custom, user + * settable flags. + */ + uint32_t flags; + + /** + * @brief Raw data to be processed. + */ + uint8_t data[]; +}; + +#endif /* SQFS_BLOCK_H */ diff --git a/include/sqfs/data_writer.h b/include/sqfs/data_writer.h index 8dedba0..3f1ad02 100644 --- a/include/sqfs/data_writer.h +++ b/include/sqfs/data_writer.h @@ -42,115 +42,6 @@ * is called for each one. */ -/** - * @enum E_SQFS_BLK_FLAGS - * - * @brief Generic flags that tell the processor what to do with a block and - * flags that the processor sets when it is done with a block. - */ -typedef enum { - /** - * @brief Only calculate checksum, do NOT compress the data. - */ - SQFS_BLK_DONT_COMPRESS = 0x0001, - - /** - * @brief Indicates that an equeued block is the first block of a file. - */ - SQFS_BLK_FIRST_BLOCK = 0x0002, - - /** - * @brief Indicates that an equeued block is the last block of a file. - */ - SQFS_BLK_LAST_BLOCK = 0x0004, - - /** - * @brief Allign the block on disk to device block size. - * - * If set in combination with @ref SQFS_BLK_FIRST_BLOCK, the output - * file is padded to a multiple of the device block size before writing - * the block. - * - * If used with @ref SQFS_BLK_LAST_BLOCK, the output file is padded - * after writing the block. - */ - SQFS_BLK_ALLIGN = 0x0008, - - /** - * @brief Indicates that a block is a tail end of a file and the block - * processor should take care of fragment packing and accounting. - */ - SQFS_BLK_IS_FRAGMENT = 0x0010, - - /** - * @brief Set by the block processor on fragment blocks that - * it generates. - */ - SQFS_BLK_FRAGMENT_BLOCK = 0x4000, - - /** - * @brief Set by compressor worker if the block was actually compressed. - */ - SQFS_BLK_IS_COMPRESSED = 0x8000, - - /** - * @brief The combination of all flags that are user settable. - */ - SQFS_BLK_USER_SETTABLE_FLAGS = 0x001F, -} E_SQFS_BLK_FLAGS; - -/** - * @struct sqfs_block_t - * - * @brief Encapsulates a chunk of data to be processed by the block processor. - */ -struct sqfs_block_t { - /** - * @brief Used internally, existing value is ignored and overwritten - * when enqueueing a block. - */ - sqfs_block_t *next; - - /** - * @brief Used internally, existing value is ignored and overwritten - * when enqueueing a block. - */ - uint32_t sequence_number; - - /** - * @brief Size of the data area. - */ - uint32_t size; - - /** - * @brief Checksum of the input data. - */ - uint32_t checksum; - - /** - * @brief Data block index within the inode. - */ - uint32_t index; - - /** - * @brief The squashfs inode related to this block. - */ - sqfs_inode_generic_t *inode; - - /** - * @brief User settable flag field. - * - * A combination of @ref E_SQFS_BLK_FLAGS and custom, user - * settable flags. - */ - uint32_t flags; - - /** - * @brief Raw data to be processed. - */ - uint8_t data[]; -}; - #ifdef __cplusplus extern "C" { #endif |