diff options
Diffstat (limited to 'src/liblzma/api/lzma')
| -rw-r--r-- | src/liblzma/api/lzma/block.h | 47 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/filter.h | 8 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/index.h | 20 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/index_hash.h | 4 |
4 files changed, 55 insertions, 24 deletions
diff --git a/src/liblzma/api/lzma/block.h b/src/liblzma/api/lzma/block.h index eb3768e2..06c1633c 100644 --- a/src/liblzma/api/lzma/block.h +++ b/src/liblzma/api/lzma/block.h @@ -1,6 +1,6 @@ /** * \file lzma/block.h - * \brief .lzma Block handling + * \brief .xz Block handling * * \author Copyright (C) 1999-2006 Igor Pavlov * \author Copyright (C) 2007 Lasse Collin @@ -131,11 +131,10 @@ typedef struct { * * \note Because of the array is terminated with * .id = LZMA_VLI_UNKNOWN, the actual array must - * have LZMA_BLOCK_FILTERS_MAX + 1 members or the Block + * have LZMA_FILTERS_MAX + 1 members or the Block * Header decoder will overflow the buffer. */ lzma_filter *filters; -# define LZMA_BLOCK_FILTERS_MAX 4 } lzma_block; @@ -148,6 +147,8 @@ typedef struct { * The size can be calculated from the first byte of a Block using this macro. * Note that if the first byte is 0x00, it indicates beginning of Index; use * this macro only when the byte is not 0x00. + * + * There is no encoding macro, because Block Header encoder is enough for that. */ #define lzma_block_header_size_decode(b) (((uint32_t)(b) + 1) * 4) @@ -211,38 +212,50 @@ extern lzma_ret lzma_block_header_decode(lzma_block *options, /** - * \brief Sets Compressed Size according to Total Size + * \brief Sets Compressed Size according to Unpadded Size * - * Block Header stores Compressed Size, but Index has Total Size. If the + * Block Header stores Compressed Size, but Index has Unpadded Size. If the * application has already parsed the Index and is now decoding Blocks, - * it can calculate Compressed Size from Total Size. This function does + * it can calculate Compressed Size from Unpadded Size. This function does * exactly that with error checking, so application doesn't need to check, * for example, if the value in Index is too small to contain even the - * Block Header. Note that you need to call this function after decoding + * Block Header. Note that you need to call this function _after_ decoding * the Block Header field. * * \return - LZMA_OK: options->compressed_size was set successfully. - * - LZMA_DATA_ERROR: total_size is too small compared to + * - LZMA_DATA_ERROR: unpadded_size is too small compared to * options->header_size and lzma_check_sizes[options->check]. * - LZMA_PROG_ERROR: Some values are invalid. For example, - * total_size and options->header_size must be multiples - * of four, total_size must be at least 12, and + * options->header_size must be a multiple of four, and * options->header_size between 8 and 1024 inclusive. */ -extern lzma_ret lzma_block_total_size_set( - lzma_block *options, lzma_vli total_size) +extern lzma_ret lzma_block_compressed_size( + lzma_block *options, lzma_vli unpadded_size) lzma_attr_warn_unused_result; /** - * \brief Calculates Total Size + * \brief Calculates Unpadded Size * - * This function can be useful after decoding a Block to get Total Size + * This function can be useful after decoding a Block to get Unpadded Size * that is stored in Index. * - * \return Total Size on success, or zero on error. + * \return Unpadded Size on success, or zero on error. + */ +extern lzma_vli lzma_block_unpadded_size(const lzma_block *options) + lzma_attr_pure; + + +/** + * \brief Calculates the total encoded size of a Block + * + * This is equivalent to lzma_block_unpadded_size() except that the returned + * value includes the size of the Block Padding field. + * + * \return On success, total encoded size of the Block. On error, + * zero is returned. */ -extern lzma_vli lzma_block_total_size_get(const lzma_block *options) +extern lzma_vli lzma_block_total_size(const lzma_block *options) lzma_attr_pure; @@ -255,8 +268,6 @@ extern lzma_vli lzma_block_total_size_get(const lzma_block *options) * \return - LZMA_OK: All good, continue with lzma_code(). * - LZMA_MEM_ERROR * - LZMA_OPTIONS_ERROR - * - LZMA_DATA_ERROR: Limits (total_limit and uncompressed_limit) - * have been reached already. * - LZMA_UNSUPPORTED_CHECK: options->check specfies a Check * that is not supported by this buid of liblzma. Initializing * the encoder failed. diff --git a/src/liblzma/api/lzma/filter.h b/src/liblzma/api/lzma/filter.h index 53e5737e..b4fb02a7 100644 --- a/src/liblzma/api/lzma/filter.h +++ b/src/liblzma/api/lzma/filter.h @@ -55,6 +55,14 @@ typedef struct { /** + * \brief Maximum number of filters in a chain + * + * FIXME desc + */ +#define LZMA_FILTERS_MAX 4 + + +/** * \brief Test if the given Filter ID is supported for encoding * * Returns true if the give Filter ID is supported for encoding by this diff --git a/src/liblzma/api/lzma/index.h b/src/liblzma/api/lzma/index.h index 522969d4..d6072614 100644 --- a/src/liblzma/api/lzma/index.h +++ b/src/liblzma/api/lzma/index.h @@ -32,12 +32,24 @@ typedef struct lzma_index_s lzma_index; */ typedef struct { /** - * Total Size of a Block. + * \brief Total encoded size of a Block including Block Padding + * + * This value is useful if you need to know the actual size of the + * Block that the Block decoder will read. */ lzma_vli total_size; /** - * Uncompressed Size of a Block + * \brief Encoded size of a Block excluding Block Padding + * + * This value is stored in the Index. When doing random-access + * reading, you should give this value to the Block decoder along + * with uncompressed_size. + */ + lzma_vli unpadded_size; + + /** + * \brief Uncompressed Size of a Block */ lzma_vli uncompressed_size; @@ -80,7 +92,7 @@ extern void lzma_index_end(lzma_index *i, lzma_allocator *allocator); * \brief Add a new Record to an Index * * \param index Pointer to a lzma_index structure - * \param total_size Total Size of a Block + * \param unpadded_size Unpadded Size of a Block * \param uncompressed_size Uncompressed Size of a Block, or * LZMA_VLI_UNKNOWN to indicate padding. * @@ -92,7 +104,7 @@ extern void lzma_index_end(lzma_index *i, lzma_allocator *allocator); * - LZMA_PROG_ERROR */ extern lzma_ret lzma_index_append(lzma_index *i, lzma_allocator *allocator, - lzma_vli total_size, lzma_vli uncompressed_size) + lzma_vli unpadded_size, lzma_vli uncompressed_size) lzma_attr_warn_unused_result; diff --git a/src/liblzma/api/lzma/index_hash.h b/src/liblzma/api/lzma/index_hash.h index 58fc8061..001e6b5c 100644 --- a/src/liblzma/api/lzma/index_hash.h +++ b/src/liblzma/api/lzma/index_hash.h @@ -57,7 +57,7 @@ extern void lzma_index_hash_end( * \brief Add a new Record to an Index hash * * \param index Pointer to a lzma_index_hash structure - * \param total_size Total Size of a Block + * \param unpadded_size Unpadded Size of a Block * \param uncompressed_size Uncompressed Size of a Block * * \return - LZMA_OK @@ -67,7 +67,7 @@ extern void lzma_index_hash_end( * used when lzma_index_hash_decode() has already been used. */ extern lzma_ret lzma_index_hash_append(lzma_index_hash *index_hash, - lzma_vli total_size, lzma_vli uncompressed_size) + lzma_vli unpadded_size, lzma_vli uncompressed_size) lzma_attr_warn_unused_result; |