diff options
Diffstat (limited to 'src/liblzma/api')
| -rw-r--r-- | src/liblzma/api/Makefile.am | 6 | ||||
| -rw-r--r-- | src/liblzma/api/lzma.h | 161 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/alignment.h | 6 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/alone.h | 52 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/auto.h | 36 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/base.h | 61 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/block.h | 38 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/check.h | 41 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/container.h | 252 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/delta.h | 36 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/easy.h | 121 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/filter.h | 74 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/index.h | 40 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/index_hash.h | 12 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/lzma.h | 222 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/memlimit.h | 15 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/raw.h | 60 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/simple.h | 2 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/stream.h | 53 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/stream_flags.h | 17 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/subblock.h | 4 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/version.h | 10 | ||||
| -rw-r--r-- | src/liblzma/api/lzma/vli.h | 131 |
23 files changed, 782 insertions, 668 deletions
diff --git a/src/liblzma/api/Makefile.am b/src/liblzma/api/Makefile.am index 194f85db..86ce5bda 100644 --- a/src/liblzma/api/Makefile.am +++ b/src/liblzma/api/Makefile.am @@ -15,22 +15,18 @@ nobase_include_HEADERS = \ lzma.h \ lzma/alignment.h \ - lzma/alone.h \ - lzma/auto.h \ lzma/base.h \ lzma/block.h \ lzma/check.h \ + lzma/container.h \ lzma/delta.h \ - lzma/easy.h \ lzma/filter.h \ lzma/index.h \ lzma/index_hash.h \ lzma/init.h \ lzma/lzma.h \ lzma/memlimit.h \ - lzma/raw.h \ lzma/simple.h \ - lzma/stream.h \ lzma/stream_flags.h \ lzma/subblock.h \ lzma/version.h \ diff --git a/src/liblzma/api/lzma.h b/src/liblzma/api/lzma.h index 9dec904f..0f109eb3 100644 --- a/src/liblzma/api/lzma.h +++ b/src/liblzma/api/lzma.h @@ -17,36 +17,103 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. + */ + +#ifndef LZMA_H +#define LZMA_H + +/***************************** + * Required standard headers * + *****************************/ + +/** + * liblzma API headers need some standard types and macros. To allow + * including lzma.h without requiring the application to include other + * headers first, lzma.h includes the required standard headers unless + * they already seem to be included. * - * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Here's what types and macros are needed and from which headers: + * - stddef.h: size_t, NULL + * - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n), + * UINT32_MAX, UINT64_MAX * - * Before #including this file, you must make the following types available: - * - size_t - * - uint8_t - * - int32_t - * - uint32_t - * - int64_t - * - uint64_t + * However, inttypes.h is a little more portable than stdint.h, although + * inttypes.h declares some unneeded things compared to plain stdint.h. * - * Before #including this file, you must make the following macros available: - * - UINT32_C(n) - * - UINT64_C(n) - * - UINT32_MAX - * - UINT64_MAX + * The hacks below aren't perfect, specifically they assume that inttypes.h + * exists and that it typedefs at least uint8_t, uint32_t, and uint64_t, + * and that unsigned int is 32-bit. If your application already takes care + * of setting up all the types properly (for example by using gnulib's + * stdint.h or inttypes.h), feel free to define LZMA_MANUAL_HEADERS before + * including lzma.h. * - * Easiest way to achieve the above is to #include sys/types.h and inttypes.h - * before #including lzma.h. However, some pre-C99 libc headers don't provide - * all the required types in inttypes.h (that file may even be missing). - * Portable applications need to provide these types themselves. This way - * liblzma API can use the standard types instead of defining its own - * (e.g. lzma_uint32). + * Some could argue that liblzma API should provide all the required types, + * for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was + * seen unnecessary mess, since most systems already provide all the necessary + * types and macros in the standard headers. * - * Note that the API still has lzma_bool, because using stdbool.h would + * Note that liblzma API still has lzma_bool, because using stdbool.h would * break C89 and C++ programs on many systems. */ -#ifndef LZMA_H -#define LZMA_H +/* stddef.h even in C++ so that we get size_t in global namespace. */ +#include <stddef.h> + +#if !defined(UINT32_C) || !defined(UINT64_C) \ + || !defined(UINT32_MAX) || !defined(UINT64_MAX) +# ifdef __cplusplus + /* + * C99 sections 7.18.2 and 7.18.4 specify that in C++ + * implementations define the limit and constant macros only + * if specifically requested. Note that if you want the + * format macros too, you need to define __STDC_FORMAT_MACROS + * before including lzma.h, since re-including inttypes.h + * with __STDC_FORMAT_MACROS defined doesn't necessarily work. + */ +# ifndef __STDC_LIMIT_MACROS +# define __STDC_LIMIT_MACROS 1 +# endif +# ifndef __STDC_CONSTANT_MACROS +# define __STDC_CONSTANT_MACROS 1 +# endif +# endif + +# include <inttypes.h> + + /* + * Some old systems have only the typedefs in inttypes.h, and lack + * all the macros. For those systems, we need a few more hacks. + * We assume that unsigned int is 32-bit and unsigned long is either + * 32-bit or 64-bit. If these hacks aren't enough, the application + * has to use setup the types manually before including lzma.h. + */ +# ifndef UINT32_C +# define UINT32_C(n) n # U +# endif + +# ifndef UINT64_C + /* Get ULONG_MAX. */ +# ifndef __cplusplus +# include <limits.h> +# else +# include <climits> +# endif +# if ULONG_MAX == 4294967295UL +# define UINT64_C(n) n ## ULL +# else +# define UINT64_C(n) n ## UL +# endif +# endif + +# ifndef UINT32_MAX +# define UINT32_MAX (UINT32_C(4294967295)) +# endif + +# ifndef UINT64_MAX +# define UINT64_MAX (UINT64_C(18446744073709551615)) +# endif +#endif + /****************** * GCC extensions * @@ -57,20 +124,50 @@ * break anything if these are sometimes enabled and sometimes not, only * affects warnings and optimizations. */ -#if defined(__GNUC__) && __GNUC__ >= 3 +#if __GNUC__ >= 3 # ifndef lzma_attribute # define lzma_attribute(attr) __attribute__(attr) # endif + # ifndef lzma_restrict # define lzma_restrict __restrict__ # endif + + /* warn_unused_result was added in GCC 3.4. */ +# ifndef lzma_attr_warn_unused_result +# if __GNUC__ == 3 && __GNUC_MINOR__ < 4 +# define lzma_attr_warn_unused_result +# endif +# endif + #else # ifndef lzma_attribute # define lzma_attribute(attr) # endif + # ifndef lzma_restrict -# define lzma_restrict +# if __STDC_VERSION__ >= 199901L +# define lzma_restrict restrict +# else +# define lzma_restrict +# endif # endif + +# define lzma_attr_warn_unused_result +#endif + + +#ifndef lzma_attr_pure +# define lzma_attr_pure lzma_attribute((__pure__)) +#endif + +#ifndef lzma_attr_const +# define lzma_attr_const lzma_attribute((__const__)) +#endif + +#ifndef lzma_attr_warn_unused_result +# define lzma_attr_warn_unused_result \ + lzma_attribute((__warn_unused_result__)) #endif @@ -89,36 +186,30 @@ extern "C" { #define LZMA_H_INTERNAL 1 /* Basic features */ +#include "lzma/version.h" #include "lzma/init.h" #include "lzma/base.h" #include "lzma/vli.h" -#include "lzma/filter.h" #include "lzma/check.h" /* Filters */ +#include "lzma/filter.h" #include "lzma/subblock.h" #include "lzma/simple.h" #include "lzma/delta.h" #include "lzma/lzma.h" /* Container formats */ -#include "lzma/block.h" -#include "lzma/stream.h" -#include "lzma/alone.h" -#include "lzma/raw.h" -#include "lzma/auto.h" -#include "lzma/easy.h" +#include "lzma/container.h" /* Advanced features */ +#include "lzma/alignment.h" /* FIXME */ +#include "lzma/block.h" #include "lzma/index.h" #include "lzma/index_hash.h" -#include "lzma/alignment.h" #include "lzma/stream_flags.h" #include "lzma/memlimit.h" -/* Version number */ -#include "lzma/version.h" - /* * All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications * re-including the subheaders. diff --git a/src/liblzma/api/lzma/alignment.h b/src/liblzma/api/lzma/alignment.h index 6672656c..008af690 100644 --- a/src/liblzma/api/lzma/alignment.h +++ b/src/liblzma/api/lzma/alignment.h @@ -27,7 +27,7 @@ * FIXME desc */ extern uint32_t lzma_alignment_input( - const lzma_options_filter *filters, uint32_t guess); + const lzma_filter *filters, uint32_t guess); /** @@ -36,7 +36,7 @@ extern uint32_t lzma_alignment_input( * Knowing the alignment of the output data is useful e.g. in the Block * encoder which tries to align the Compressed Data field optimally. * - * \param filters Pointer to lzma_options_filter array, whose last + * \param filters Pointer to lzma_filter array, whose last * member must have .id = LZMA_VLI_VALUE_UNKNOWN. * \param guess The value to return if the alignment of the output * is the same as the alignment of the input data. @@ -57,4 +57,4 @@ extern uint32_t lzma_alignment_input( * options), UINT32_MAX is returned. */ extern uint32_t lzma_alignment_output( - const lzma_options_filter *filters, uint32_t guess); + const lzma_filter *filters, uint32_t guess); diff --git a/src/liblzma/api/lzma/alone.h b/src/liblzma/api/lzma/alone.h deleted file mode 100644 index 72299773..00000000 --- a/src/liblzma/api/lzma/alone.h +++ /dev/null @@ -1,52 +0,0 @@ -/** - * \file lzma/alone.h - * \brief Handling of the legacy LZMA_Alone format - * - * \author Copyright (C) 1999-2006 Igor Pavlov - * \author Copyright (C) 2007 Lasse Collin - * - * This library 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 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - */ - -#ifndef LZMA_H_INTERNAL -# error Never include this file directly. Use <lzma.h> instead. -#endif - - -/** - * \brief Initializes LZMA_Alone encoder - * - * LZMA_Alone files have the suffix .lzma like the .lzma Stream files. - * LZMA_Alone format supports only one filter, the LZMA filter. There is - * no support for integrity checks like CRC32. - * - * Use this format if and only if you need to create files readable by - * legacy LZMA tools. - * - * LZMA_Alone encoder doesn't support LZMA_SYNC_FLUSH or LZMA_FULL_FLUSH. - * - * \return - LZMA_OK - * - LZMA_MEM_ERROR - * - LZMA_PROG_ERROR - */ -extern lzma_ret lzma_alone_encoder( - lzma_stream *strm, const lzma_options_lzma *options); - - -/** - * \brief Initializes decoder for LZMA_Alone file - * - * The LZMA_Alone decoder supports LZMA_SYNC_FLUSH. - * - * \return - LZMA_OK - * - LZMA_MEM_ERROR - */ -extern lzma_ret lzma_alone_decoder(lzma_stream *strm); diff --git a/src/liblzma/api/lzma/auto.h b/src/liblzma/api/lzma/auto.h deleted file mode 100644 index fd5bf7d2..00000000 --- a/src/liblzma/api/lzma/auto.h +++ /dev/null @@ -1,36 +0,0 @@ -/** - * \file lzma/auto.h - * \brief Decoder with automatic file format detection - * - * \author Copyright (C) 1999-2006 Igor Pavlov - * \author Copyright (C) 2007 Lasse Collin - * - * This library 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 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - */ - -#ifndef LZMA_H_INTERNAL -# error Never include this file directly. Use <lzma.h> instead. -#endif - - -/** - * \brief Decode .lzma Streams and LZMA_Alone files with autodetection - * - * Autodetects between the .lzma Stream and LZMA_Alone formats, and - * calls lzma_stream_decoder_init() or lzma_alone_decoder_init() once - * the type of the file has been detected. - * - * \param strm Pointer to propertily prepared lzma_stream - * - * \return - LZMA_OK: Initialization was successful. - * - LZMA_MEM_ERROR: Cannot allocate memory. - */ -extern lzma_ret lzma_auto_decoder(lzma_stream *strm); diff --git a/src/liblzma/api/lzma/base.h b/src/liblzma/api/lzma/base.h index b0dfed95..cb614176 100644 --- a/src/liblzma/api/lzma/base.h +++ b/src/liblzma/api/lzma/base.h @@ -134,7 +134,7 @@ typedef enum { * \brief Unknown file format */ - LZMA_MEMLIMIT_ERROR = -9 + LZMA_MEMLIMIT_ERROR = -9, /** * \brief Memory usage limit was reached * @@ -143,6 +143,9 @@ typedef enum { * the memory usage limit has to be increased. See functions * lzma_memlimit_get() and lzma_memlimit_set(). */ + + LZMA_NO_CHECK = -10, + LZMA_SEE_CHECK = -11 } lzma_ret; @@ -229,11 +232,6 @@ typedef struct { /** * \brief Pointer to custom memory allocation function * - * Set this to point to your custom memory allocation function. - * It can be useful for example if you want to limit how much - * memory liblzma is allowed to use: for this, you may use - * a pointer to lzma_memory_alloc(). - * * If you don't want a custom allocator, but still want * custom free(), set this to NULL and liblzma will use * the standard malloc(). @@ -250,16 +248,19 @@ typedef struct { * size nmemb * size, or NULL if allocation fails * for some reason. When allocation fails, functions * of liblzma return LZMA_MEM_ERROR. + * + * For performance reasons, the allocator should not waste time + * zeroing the allocated buffers. This is not only about speed, but + * also memory usage, since the operating system kernel doesn't + * necessarily allocate the requested memory until it is actually + * used. With small input files liblzma may actually need only a + * fraction of the memory that it requested for allocation. */ void *(*alloc)(void *opaque, size_t nmemb, size_t size); /** * \brief Pointer to custom memory freeing function * - * Set this to point to your custom memory freeing function. - * If lzma_memory_alloc() is used as allocator, this should - * be set to lzma_memory_free(). - * * If you don't want a custom freeing function, but still * want a custom allocator, set this to NULL and liblzma * will use the standard free(). @@ -279,10 +280,6 @@ typedef struct { * and lzma_allocator.free(). This intended to ease implementing * custom memory allocation functions for use with liblzma. * - * When using lzma_memory_alloc() and lzma_memory_free(), opaque - * must point to lzma_memory_limiter structure allocated and - * initialized with lzma_memory_limiter_create(). - * * If you don't need this, you should set it to NULL. */ void *opaque; @@ -347,6 +344,17 @@ typedef struct { /** Internal state is not visible to outsiders. */ lzma_internal *internal; + /** + * Reserved space to allow possible future extensions without + * breaking the ABI. Excluding the initialization of this structure, + * you should not touch these, because the names of these variables + * may change. + */ + void *reserved_ptr1; + void *reserved_ptr2; + uint64_t reserved_int1; + uint64_t reserved_int2; + } lzma_stream; @@ -358,22 +366,18 @@ typedef struct { * has been allocated yet: * * lzma_stream strm = LZMA_STREAM_INIT; - */ -#define LZMA_STREAM_INIT { NULL, 0, 0, NULL, 0, 0, NULL, NULL } - - -/** - * \brief Initialization for lzma_stream * - * This is like LZMA_STREAM_INIT, but this can be used when the lzma_stream - * has already been allocated: + * If you need to initialize a dynamically allocatedlzma_stream, you can use + * memset(strm_pointer, 0, sizeof(lzma_stream)). Strictly speaking, this + * violates the C standard since NULL may have different internal + * representation than zero, but it should be portable enough in practice. + * Anyway, for maximum portability, you could use this: * - * lzma_stream *strm = malloc(sizeof(lzma_stream)); - * if (strm == NULL) - * return LZMA_MEM_ERROR; - * *strm = LZMA_STREAM_INIT_VAR; + * lzma_stream tmp = LZMA_STREAM_INIT; + * *strm = tmp; */ -extern const lzma_stream LZMA_STREAM_INIT_VAR; +#define LZMA_STREAM_INIT \ + { NULL, 0, 0, NULL, 0, 0, NULL, NULL, NULL, NULL, 0, 0 } /** @@ -409,7 +413,8 @@ extern const lzma_stream LZMA_STREAM_INIT_VAR; * - LZMA_PROG_ERROR: Invalid arguments or the internal state * of the coder is corrupt. */ -extern lzma_ret lzma_code(lzma_stream *strm, lzma_action action); +extern lzma_ret lzma_code(lzma_stream *strm, lzma_action action) + lzma_attr_warn_unused_result; /** diff --git a/src/liblzma/api/lzma/block.h b/src/liblzma/api/lzma/block.h index a8941165..45045815 100644 --- a/src/liblzma/api/lzma/block.h +++ b/src/liblzma/api/lzma/block.h @@ -36,12 +36,13 @@ typedef struct { * \brief Size of the Block Header * * Read by: + * - lzma_block_header_encode() + * - lzma_block_header_decode() * - lzma_block_encoder() * - lzma_block_decoder() * * Written by: * - lzma_block_header_size() - * - lzma_block_header_decode() */ uint32_t header_size; # define LZMA_BLOCK_HEADER_SIZE_MIN 8 @@ -54,10 +55,12 @@ typedef struct { * Header, thus its value must be provided also when decoding. * * Read by: + * - lzma_block_header_encode() + * - lzma_block_header_decode() * - lzma_block_encoder() * - lzma_block_decoder() */ - lzma_check_type check; + lzma_check check; /** * \brief Size of the Compressed Data in bytes @@ -134,17 +137,17 @@ typedef struct { * have LZMA_BLOCK_FILTERS_MAX + 1 members or the Block * Header decoder will overflow the buffer. */ - lzma_options_filter *filters; + lzma_filter *filters; # define LZMA_BLOCK_FILTERS_MAX 4 -} lzma_options_block; +} lzma_block; /** * \brief Decodes the Block Header Size field * * To decode Block Header using lzma_block_header_decode(), the size of the - * Block Header has to be known and stored into lzma_options_block.header_size. + * Block Header has to be known and stored into lzma_block.header_size. * 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. @@ -164,7 +167,8 @@ typedef struct { * may return LZMA_OK even if lzma_block_header_encode() or * lzma_block_encoder() would fail. */ -extern lzma_ret lzma_block_header_size(lzma_options_block *options); +extern lzma_ret lzma_block_header_size(lzma_block *options) + lzma_attr_warn_unused_result; /** @@ -183,7 +187,8 @@ extern lzma_ret lzma_block_header_size(lzma_options_block *options); * - LZMA_PROG_ERROR */ extern lzma_ret lzma_block_header_encode( - const lzma_options_block *options, uint8_t *out); + const lzma_block *options, uint8_t *out) + lzma_attr_warn_unused_result; /** @@ -203,8 +208,9 @@ extern lzma_ret lzma_block_header_encode( * - LZMA_HEADER_ERROR: Invalid or unsupported options. * - LZMA_PROG_ERROR */ -extern lzma_ret lzma_block_header_decode(lzma_options_block *options, - lzma_allocator *allocator, const uint8_t *in); +extern lzma_ret lzma_block_header_decode(lzma_block *options, + lzma_allocator *allocator, const uint8_t *in) + lzma_attr_warn_unused_result; /** @@ -227,7 +233,8 @@ extern lzma_ret lzma_block_header_decode(lzma_options_block *options, * options->header_size between 8 and 1024 inclusive. */ extern lzma_ret lzma_block_total_size_set( - lzma_options_block *options, lzma_vli total_size); + lzma_block *options, lzma_vli total_size) + lzma_attr_warn_unused_result; /** @@ -238,7 +245,8 @@ extern lzma_ret lzma_block_total_size_set( * * \return Total Size on success, or zero on error. */ -extern lzma_vli lzma_block_total_size_get(const lzma_options_block *options); +extern lzma_vli lzma_block_total_size_get(const lzma_block *options) + lzma_attr_pure; /** @@ -259,8 +267,8 @@ extern lzma_vli lzma_block_total_size_get(const lzma_options_block *options); * * lzma_code() can return FIXME */ -extern lzma_ret lzma_block_encoder( - lzma_stream *strm, lzma_options_block *options); +extern lzma_ret lzma_block_encoder(lzma_stream *strm, lzma_block *options) + lzma_attr_warn_unused_result; /** @@ -273,5 +281,5 @@ extern lzma_ret lzma_block_encoder( * - LZMA_PROG_ERROR * - LZMA_MEM_ERROR */ -extern lzma_ret lzma_block_decoder( - lzma_stream *strm, lzma_options_block *options); +extern lzma_ret lzma_block_decoder(lzma_stream *strm, lzma_block *options) + lzma_attr_warn_unused_result; diff --git a/src/liblzma/api/lzma/check.h b/src/liblzma/api/lzma/check.h index dcba8269..18394a86 100644 --- a/src/liblzma/api/lzma/check.h +++ b/src/liblzma/api/lzma/check.h @@ -56,7 +56,7 @@ typedef enum { * * Size of the Check field: 32 bytes */ -} lzma_check_type; +} lzma_check; /** @@ -74,31 +74,34 @@ typedef enum { /** - * \brief Check IDs supported by this liblzma build - * - * If lzma_available_checks[n] is true, the Check ID n is supported by this - * liblzma build. You can assume that LZMA_CHECK_NONE and LZMA_CHECK_CRC32 - * are always available. + * \brief Maximum size of a Check field */ -extern const lzma_bool lzma_available_checks[LZMA_CHECK_ID_MAX + 1]; +#define LZMA_CHECK_SIZE_MAX 64 /** - * \brief Size of the Check field with different Check IDs + * \brief Test if the given Check ID is supported * - * Although not all Check IDs have a check algorithm associated, the size of - * every Check is already frozen. This array contains the size (in bytes) of - * the Check field with specified Check ID. The values are taken from the - * section 2.1.1.2 of the .lzma file format specification: - * { 0, 4, 4, 4, 8, 8, 8, 16, 16, 16, 32, 32, 32, 64, 64, 64 } + * Returns true if the given Check ID is supported by this liblzma build. + * Otherwise false is returned. It is safe to call this with a value that + * is not in the range [0, 15]; in that case the return value is always false. */ -extern const uint32_t lzma_check_sizes[LZMA_CHECK_ID_MAX + 1]; +extern lzma_bool lzma_check_is_supported(lzma_check check) + lzma_attr_const; /** - * \brief Maximum size of a Check field + * \brief Get the size of the Check field with given Check ID + * + * Although not all Check IDs have a check algorithm associated, the size of + * every Check is already frozen. This function returns the size (in bytes) of + * the Check field with the specified Check ID. The values are taken from the + * section 2.1.1.2 of the .lzma file format specification: + * { 0, 4, 4, 4, 8, 8, 8, 16, 16, 16, 32, 32, 32, 64, 64, 64 } + * + * If the argument is not in the range [0, 15], UINT32_MAX is returned. */ -#define LZMA_CHECK_SIZE_MAX 64 +extern uint32_t lzma_check_size(lzma_check check) lzma_attr_const; /** @@ -115,7 +118,8 @@ extern const uint32_t lzma_check_sizes[LZMA_CHECK_ID_MAX + 1]; * \return Updated CRC value, which can be passed to this function * again to continue CRC calculation. */ -extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc); +extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc) + lzma_attr_pure; /** @@ -125,7 +129,8 @@ extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc); * * This function is used similarly to lzma_crc32(). See its documentation. */ -extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc); +extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc) + lzma_attr_pure; /* diff --git a/src/liblzma/api/lzma/container.h b/src/liblzma/api/lzma/container.h new file mode 100644 index 00000000..27014856 --- /dev/null +++ b/src/liblzma/api/lzma/container.h @@ -0,0 +1,252 @@ +/** + * \file lzma/FIXME.h + * \brief File formats + * + * \author Copyright (C) 1999-2008 Igor Pavlov + * \author Copyright (C) 2007-2008 Lasse Collin + * + * This library 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 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + */ + +#ifndef LZMA_H_INTERNAL +# error Never include this file directly. Use <lzma.h> instead. +#endif + + +/************ + * Encoding * + ************/ + +/** + * \brief Compression level names for lzma_easy_* functions + * + * At the moment, all the compression levels support LZMA_SYNC_FLUSH. + * In future there may be levels that don't support LZMA_SYNC_FLUSH. + * However, the LZMA_SYNC_FLUSH support won't be removed from the + * existing compression levels. + * + * \note If liblzma is built without encoder support, or with some + * filters disabled, some of the compression levels may be + * unsupported. In that case, the initialization functions + * will return LZMA_HEADER_ERROR. + */ +typedef enum { + LZMA_EASY_COPY = 0, + /**< + * No compression; the data is just wrapped into .lzma + * container. + */ + + LZMA_EASY_LZMA2_1 = 1, + /**< + * LZMA2 filter with fast compression (fast in terms of LZMA2). + * If you are interested in the exact options used, see + * lzma_preset_lzma[0]. Note that the exact options may + * change between liblzma versions. + * + * At the moment, the command line tool uses these settings + * when `lzma -1' is used. In future, the command line tool + * may default to some more complex way to determine the + * settings used e.g. the type of files being compressed. + * + * LZMA_EASY_LZMA_2 is equivalent to lzma_preset_lzma[1] + * and so on. + */ + + LZMA_EASY_LZMA_2 = 2, + LZMA_EASY_LZMA_3 = 3, + LZMA_EASY_LZMA_4 = 4, + LZMA_EASY_LZMA_5 = 5, + LZMA_EASY_LZMA_6 = 6, + LZMA_EASY_LZMA_7 = 7, + LZMA_EASY_LZMA_8 = 8, + LZMA_EASY_LZMA_9 = 9, +} lzma_easy_level; + + +/** + * \brief Default compression level + * + * Data Blocks contain the actual compressed data. It's not straightforward + * to recommend a default level, because in some cases keeping the resource + * usage relatively low is more important that getting the maximum + * compression ratio. + */ +#define LZMA_EASY_DEFAULT LZMA_EASY_LZMA2_7 + + +/** + * \brief Calculates rough memory requirements of a compression level + * + * This function is a wrapper for lzma_memory_usage(), which is declared + * in filter.h. + * + * \return Approximate memory usage of the encoder with the given + * compression level in mebibytes (value * 1024 * 1024 bytes). + * On error (e.g. compression level is not supported), + * UINT32_MAX is returned. + */ +extern uint32_t lzma_easy_memory_usage(lzma_easy_level level) + lzma_attr_pure; + + +/** + * \brief Initializes .lzma Stream encoder + * + * This function is intended for those who just want to use the basic features + * if liblzma (that is, most developers out there). Lots of assumptions are + * made, which are correct or at least good enough for most situations. + * + * \param strm Pointer to lzma_stream that is at least initialized + * with LZMA_STREAM_INIT. + * \param level Compression level to use. This selects a set of + * compression settings from a list of compression + * presets. + * + * \return - LZMA_OK: Initialization succeeded. Use lzma_code() to + * encode your data. + * - LZMA_MEM_ERROR: Memory allocation failed. All memory + * previously allocated for *strm is now freed. + * - LZMA_HEADER_ERROR: The given compression level is not + * supported by this build of liblzma. + * + * If initialization succeeds, use lzma_code() to do the actual encoding. + * Valid values for `action' (the second argument of lzma_code()) are + * LZMA_RUN, LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, and LZMA_FINISH. In future, + * there may be compression levels that don't support LZMA_SYNC_FLUSH. + */ +extern lzma_ret lzma_easy_encoder(lzma_stream *strm, lzma_easy_level level) + lzma_attr_warn_unused_result; + + +/** + * \brief Initializes .lzma Stream encoder + * + * \param strm Pointer to properly prepared lzma_stream + * \param filters Array of filters. This must be terminated with + * filters[n].id = LZMA_VLI_VALUE_UNKNOWN. There must + * be 1-4 filters, but there are restrictions on how + * multiple filters can be combined. FIXME Tell where + * to find more information. + * \param check Type of the integrity check to calculate from + * uncompressed data. + * + * \return - LZMA_OK: Initialization was successful. + * - LZMA_MEM_ERROR + * - LZMA_HEADER_ERROR + * - LZMA_PROG_ERROR + */ +extern lzma_ret lzma_stream_encoder(lzma_stream *strm, + const lzma_filter *filters, lzma_check check) + lzma_attr_warn_unused_result; + + +/** + * \brief Initializes LZMA_Alone (deprecated file format) encoder + * + * LZMA_Alone files have the suffix .lzma like the .lzma Stream files. + * LZMA_Alone format supports only one filter, the LZMA filter. There is + * no support for integrity checks like CRC32. + * + * Use this format if and only if you need to create files readable by + * legacy LZMA tools such as LZMA Utils 4.32.x. + * + * LZMA_Alone encoder doesn't support LZMA_SYNC_FLUSH or LZMA_FULL_FLUSH. + * + * \return - LZMA_OK + * - LZMA_MEM_ERROR + * - LZMA_PROG_ERROR + */ +extern lzma_ret lzma_alone_encoder( + lzma_stream *strm, const lzma_options_lzma *options) + lzma_attr_warn_unused_result; + + +/************ + * Decoding * + ************/ + +/** + * This flag makes lzma_code() return LZMA_NO_CHECK if the input stream + * being decoded has no integrity check. Note that when used with + * lzma_auto_decoder(), all LZMA_Alone files will cause trigger LZMA_NO_CHECK + * if LZMA_WARN_NO_CHECK is used. + */ +#define LZMA_WARN_NO_CHECK UINT32_C(0x01) + + +/** + * This flag makes lzma_code() return LZMA_UNSUPPORTED_CHECK if the input + * stream has an integrity check, but the type of the integrity check is not + * supported by this liblzma version or build. Such files can still be + * decoded, but the integrity check cannot be verified. + */ +#define LZMA_WARN_UNSUPPORTED_CHECK UINT32_C(0x02) + + +/** + * This flag makes lzma_code() return LZMA_READ_CHECK as soon as the type + * of the integrity check is known. The type can then be read with + * lzma_check_get(). + */ +#define LZMA_TELL_CHECK UINT32_C(0x04) + + +/** + * This flag makes lzma_code() decode concatenated .lzma files. + * FIXME Explain the changed API. + */ +#define LZMA_CONCATENATED UINT32_C(0x08) + + +/** + * \brief Initializes decoder for .lzma Stream + * + * \param strm Pointer to propertily prepared lzma_stream + * \param memlimit Rough memory usage limit as bytes + * + * \return - LZMA_OK: Initialization was successful. + * - LZMA_MEM_ERROR: Cannot allocate memory. + */ +extern lzma_ret lzma_stream_decoder( + lzma_stream *strm, uint64_t memlimit, uint32_t flags) + lzma_attr_warn_unused_result; + + +/** + * \brief Decode .lzma Streams and LZMA_Alone files with autodetection + * + * Autodetects between the .lzma Stream and LZMA_Alone formats, and + * calls lzma_stream_decoder_init() or lzma_alone_decoder_init() once + * the type of the file has been detected. + * + * \param strm Pointer to propertily prepared lzma_stream + * \param memlimit Rough memory usage limit as bytes + * \param flags Bitwise-or of flags, or zero for no flags. + * + * \return - LZMA_OK: Initialization was successful. + * - LZMA_MEM_ERROR: Cannot allocate memory. + */ +extern lzma_ret lzma_auto_decoder( + lzma_stream *strm, uint64_t memlimit, uint32_t flags) + lzma_attr_warn_unused_result; + + +/** + * \brief Initializes decoder for LZMA_Alone file + * + * The LZMA_Alone decoder supports LZMA_SYNC_FLUSH. FIXME + * + * \return - LZMA_OK + * - LZMA_MEM_ERROR + */ +extern lzma_ret lzma_alone_decoder(lzma_stream *strm, uint64_t memlimit) + lzma_attr_warn_unused_result; diff --git a/src/liblzma/api/lzma/delta.h b/src/liblzma/api/lzma/delta.h index 58afec18..740de97c 100644 --- a/src/liblzma/api/lzma/delta.h +++ b/src/liblzma/api/lzma/delta.h @@ -24,9 +24,21 @@ /** * \brief Filter ID * - * Filter ID of the Delta filter. This is used as lzma_options_filter.id. + * Filter ID of the Delta filter. This is used as lzma_filter.id. */ -#define LZMA_FILTER_DELTA LZMA_VLI_C(0x20) +#define LZMA_FILTER_DELTA LZMA_VLI_C(0x03) + + +/** + * \brief Type of the delta calculation + * + * Currently only byte-wise delta is supported. Other possible types could + * be, for example, delta of 16/32/64-bit little/big endian integers, but + * these are not currently planned since byte-wise delta is almost as good. + */ +typedef enum { + LZMA_DELTA_TYPE_BYTE +} lzma_delta_type; /** @@ -35,8 +47,14 @@ * These options are needed by both encoder and decoder. */ typedef struct { + /** For now, this must always be LZMA_DELTA_TYPE_BYTE. */ + lzma_delta_type type; + /** - * \brief Delta distance as bytes + * \brief Delta distance + * + * With the only currently supported type, LZMA_DELTA_TYPE_BYTE, + * the distance is as bytes. * * Examples: * - 16-bit stereo audio: distance = 4 bytes @@ -46,4 +64,16 @@ typedef struct { # define LZMA_DELTA_DISTANCE_MIN 1 # define LZMA_DELTA_DISTANCE_MAX 256 + /** + * \brief Reserved space for possible future extensions + * + * You should not touch these, because the names of these variables + * may change. These are and will never be used when type is + * LZMA_DELTA_TYPE_BYTE, so it is safe to leave these uninitialized. + */ + uint32_t reserved_int1; + uint32_t reserved_int2; + void *reserved_ptr1; + void *reserved_ptr2; + } lzma_options_delta; diff --git a/src/liblzma/api/lzma/easy.h b/src/liblzma/api/lzma/easy.h deleted file mode 100644 index d83a79a2..00000000 --- a/src/liblzma/api/lzma/easy.h +++ /dev/null @@ -1,121 +0,0 @@ -/** - * \file lzma/easy.h - * \brief Easy to use encoder initialization - * - * \author Copyright (C) 1999-2006 Igor Pavlov - * \author Copyright (C) 2008 Lasse Collin - * - * This library 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 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - */ - -#ifndef LZMA_H_INTERNAL -# error Never include this file directly. Use <lzma.h> instead. -#endif - - -/** - * \brief Compression level names for lzma_easy_* functions - * - * At the moment, all the compression levels support LZMA_SYNC_FLUSH. - * In future there may be levels that don't support LZMA_SYNC_FLUSH. - * However, the LZMA_SYNC_FLUSH support won't be removed from the - * existing compression levels. - * - * \note If liblzma is built without encoder support, or with some - * filters disabled, some of the compression levels may be - * unsupported. In that case, the initialization functions - * will return LZMA_HEADER_ERROR. - */ -typedef enum { - LZMA_EASY_COPY, - /**< - * No compression; the data is just wrapped into .lzma - * container. - */ - - LZMA_EASY_LZMA_1, - /**< - * LZMA filter with fast compression (fast in terms of LZMA). - * If you are interested in the exact options used, see - * lzma_preset_lzma[0]. Note that the exact options may - * change between liblzma versions. - * - * At the moment, the command line tool uses these settings - * when `lzma -1' is used. In future, the command line tool - * may default to some more complex way to determine the - * settings used e.g. the type of files being compressed. - * - * LZMA_EASY_LZMA_2 is equivalent to lzma_preset_lzma[1] - * and so on. - */ - - LZMA_EASY_LZMA_2, - LZMA_EASY_LZMA_3, - LZMA_EASY_LZMA_4, - LZMA_EASY_LZMA_5, - LZMA_EASY_LZMA_6, - LZMA_EASY_LZMA_7, - LZMA_EASY_LZMA_8, - LZMA_EASY_LZMA_9, -} lzma_easy_level; - - -/** - * \brief Default compression level - * - * Data Blocks contain the actual compressed data. It's not straightforward - * to recommend a default level, because in some cases keeping the resource - * usage relatively low is more important that getting the maximum - * compression ratio. - */ -#define LZMA_EASY_DEFAULT LZMA_EASY_LZMA_7 - - -/** - * \brief Calculates rough memory requirements of a compression level - * - * This function is a wrapper for lzma_memory_usage(), which is declared - * in lzma/filter.h. - * - * \return Approximate memory usage of the encoder with the given - * compression level in mebibytes (value * 1024 * 1024 bytes). - * On error (e.g. compression level is not supported), - * UINT32_MAX is returned. - */ -extern uint32_t lzma_easy_memory_usage(lzma_easy_level level); - - -/** - * \brief Initializes .lzma Stream encoder - * - * This function is intended for those who just want to use the basic LZMA - * features (that is, most developers out there). Lots of assumptions are - * made, which are correct or at least good enough for most situations. - * - * \param strm Pointer to lzma_stream that is at least initialized - * with LZMA_STREAM_INIT. - * \param level Compression level to use. This selects a set of - * compression settings from a list of compression - * presets. - * - * \return - LZMA_OK: Initialization succeeded. Use lzma_code() to - * encode your data. - * - LZMA_MEM_ERROR: Memory allocation failed. All memory - * previously allocated for *strm is now freed. - * - LZMA_HEADER_ERROR: The given compression level is not - * supported by this build of liblzma. - * - * If initialization succeeds, use lzma_code() to do the actual encoding. - * Valid values for `action' (the second argument of lzma_code()) are - * LZMA_RUN, LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, and LZMA_FINISH. In future, - * there may be compression levels that don't support LZMA_SYNC_FLUSH. - */ -extern lzma_ret lzma_easy_encoder(lzma_stream *strm, lzma_easy_level level); diff --git a/src/liblzma/api/lzma/filter.h b/src/liblzma/api/lzma/filter.h index 412c30e5..d5903f89 100644 --- a/src/liblzma/api/lzma/filter.h +++ b/src/liblzma/api/lzma/filter.h @@ -51,7 +51,7 @@ typedef struct { */ void *options; -} lzma_options_filter; +} lzma_filter; /** @@ -65,7 +65,7 @@ typedef struct { * encoding-specific functions are probably missing from the library * API/ABI completely. */ -extern const lzma_vli *const lzma_available_filter_encoders; +extern const lzma_vli *const lzma_filter_encoders; /** @@ -79,7 +79,7 @@ extern const lzma_vli *const lzma_available_filter_encoders; * decoding-specific functions are probably missing from the library * API/ABI completely. */ -extern const lzma_vli *const lzma_available_filter_decoders; +extern const lzma_vli *const lzma_filter_decoders; /** @@ -87,8 +87,6 @@ extern const lzma_vli *const lzma_available_filter_decoders; * * \param filters Array of filters terminated with * .id == LZMA_VLI_VALUE_UNKNOWN. - * \param is_encoder Set to true when calculating memory requirements - * of an encoder; false for decoder. * * \return Number of mebibytes (MiB i.e. 2^20) required for the given * encoder or decoder filter chain. @@ -98,8 +96,55 @@ extern const lzma_vli *const lzma_available_filter_decoders; * if calculating memory requirements of decoder, lzma_init() or * lzma_init_decoder() must have been called earlier. */ -extern uint32_t lzma_memory_usage( - const lzma_options_filter *filters, lzma_bool is_encoder); +// extern uint32_t lzma_memory_usage( +// const lzma_filter *filters, lzma_bool is_encoder); + +extern uint64_t lzma_memusage_encoder(const lzma_filter *filters) + lzma_attr_pure; + +extern uint64_t lzma_memusage_decoder(const lzma_filter *filters) + lzma_attr_pure; + + +/** + * \brief Initializes raw encoder + * + * This function may be useful when implementing custom file formats. + * + * \param strm Pointer to properly prepared lzma_stream + * \param options Array of lzma_filter structures. + * The end of the array must be marked with + * .id = LZMA_VLI_VALUE_UNKNOWN. The minimum + * number of filters is one and the maximum is four. + * + * The `action' with lzma_code() can be LZMA_RUN, LZMA_SYNC_FLUSH (if the + * filter chain supports it), or LZMA_FINISH. + * + * \return - LZMA_OK + * - LZMA_MEM_ERROR + * - LZMA_HEADER_ERROR + * - LZMA_PROG_ERROR + */ +extern lzma_ret lzma_raw_encoder( + lzma_stream *strm, const lzma_filter *options) + lzma_attr_warn_unused_result; + + +/** + * \brief Initializes raw decoder + * + * The initialization of raw decoder goes similarly to raw encoder. + * + * The `action' with lzma_code() can be LZMA_RUN or LZMA_SYNC_FLUSH. + * + * \return - LZMA_OK + * - LZMA_MEM_ERROR + * - LZMA_HEADER_ERROR + * - LZMA_PROG_ERROR + */ +extern lzma_ret lzma_raw_decoder( + lzma_stream *strm, const lzma_filter *options) + lzma_attr_warn_unused_result; /** @@ -119,10 +164,11 @@ extern uint32_t lzma_memory_usage( * - LZMA_PROG_ERROR: Invalid options * * \note If you need to calculate size of List of Filter Flags, - * you need to loop over every lzma_options_filter entry. + * you need to loop over every lzma_filter entry. */ extern lzma_ret lzma_filter_flags_size( - uint32_t *size, const lzma_options_filter *options); + uint32_t *size, const lzma_filter *options) + lzma_attr_warn_unused_result; /** @@ -143,8 +189,9 @@ extern lzma_ret lzma_filter_flags_size( * buffer space (you should have checked it with * lzma_filter_flags_size()). */ -extern lzma_ret lzma_filter_flags_encode(uint8_t *out, size_t *out_pos, - size_t out_size, const lzma_options_filter *options); +extern lzma_ret lzma_filter_flags_encode(const lzma_filter *options, + uint8_t *out, size_t *out_pos, size_t out_size) + lzma_attr_warn_unused_result; /** @@ -163,5 +210,6 @@ extern lzma_ret lzma_filter_flags_encode(uint8_t *out, size_t *out_pos, * - LZMA_PROG_ERROR */ extern lzma_ret lzma_filter_flags_decode( - lzma_options_filter *options, lzma_allocator *allocator, - const uint8_t *in, size_t *in_pos, size_t in_size); + lzma_filter *options, lzma_allocator *allocator, + const uint8_t *in, size_t *in_pos, size_t in_size) + lzma_attr_warn_unused_result; diff --git a/src/liblzma/api/lzma/index.h b/src/liblzma/api/lzma/index.h index 13cddf47..44be10b1 100644 --- a/src/liblzma/api/lzma/index.h +++ b/src/liblzma/api/lzma/index.h @@ -66,7 +66,8 @@ typedef struct { * In this case, return value cannot be NULL or a different pointer than * the i given as argument. */ -extern lzma_index *lzma_index_init(lzma_index *i, lzma_allocator *allocator); +extern lzma_index *lzma_index_init(lzma_index *i, lzma_allocator *allocator) + lzma_attr_warn_unused_result; /** @@ -91,13 +92,14 @@ 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 total_size, lzma_vli uncompressed_size) + lzma_attr_warn_unused_result; /** * \brief Get the number of Records */ -extern lzma_vli lzma_index_count(const lzma_index *i); +extern lzma_vli lzma_index_count(const lzma_index *i) lzma_attr_pure; /** @@ -105,7 +107,7 @@ extern lzma_vli lzma_index_count(const lzma_index *i); * * This is needed to verify the Index Size field from the Stream Footer. */ -extern lzma_vli lzma_index_size(const lzma_index *i); +extern lzma_vli lzma_index_size(const lzma_index *i) lzma_attr_pure; /** @@ -114,7 +116,7 @@ extern lzma_vli lzma_index_size(const lzma_index *i); * This doesn't include the Stream Header, Stream Footer, Stream Padding, * or Index fields. */ -extern lzma_vli lzma_index_total_size(const lzma_index *i); +extern lzma_vli lzma_index_total_size(const lzma_index *i) lzma_attr_pure; /** @@ -123,7 +125,7 @@ extern lzma_vli lzma_index_total_size(const lzma_index *i); * If multiple Indexes have been combined, this works as if the Blocks * were in a single Stream. */ -extern lzma_vli lzma_index_stream_size(const lzma_index *i); +extern lzma_vli lzma_index_stream_size(const lzma_index *i) lzma_attr_pure; /** @@ -133,19 +135,21 @@ extern lzma_vli lzma_index_stream_size(const lzma_index *i); * identical to lzma_index_stream_size(). If multiple Indexes have been * combined, this includes also the possible Stream Padding fields. */ -extern lzma_vli lzma_index_file_size(const lzma_index *i); +extern lzma_vli lzma_index_file_size(const lzma_index *i) lzma_attr_pure; /** * \brief Get the uncompressed size of the Stream */ -extern lzma_vli lzma_index_uncompressed_size(const lzma_index *i); +extern lzma_vli lzma_index_uncompressed_size(const lzma_index *i) + lzma_attr_pure; /** * \brief Get the next Record from the Index */ -extern lzma_bool lzma_index_read(lzma_index *i, lzma_index_record *record); +extern lzma_bool lzma_index_read(lzma_index *i, lzma_index_record *record) + lzma_attr_warn_unused_result; /** @@ -179,7 +183,8 @@ extern void lzma_index_rewind(lzma_index *i); * and the read position are not modified, and this function returns true. */ extern lzma_bool lzma_index_locate( - lzma_index *i, lzma_index_record *record, lzma_vli target); + lzma_index *i, lzma_index_record *record, lzma_vli target) + lzma_attr_warn_unused_result; /** @@ -202,7 +207,8 @@ extern lzma_bool lzma_index_locate( */ extern lzma_ret lzma_index_cat(lzma_index *lzma_restrict dest, lzma_index *lzma_restrict src, - lzma_allocator *allocator, lzma_vli padding); + lzma_allocator *allocator, lzma_vli padding) + lzma_attr_warn_unused_result; /** @@ -211,22 +217,26 @@ extern lzma_ret lzma_index_cat(lzma_index *lzma_restrict dest, * \return A copy of the Index, or NULL if memory allocation failed. */ extern lzma_index *lzma_index_dup( - const lzma_index *i, lzma_allocator *allocator); + const lzma_index *i, lzma_allocator *allocator) + lzma_attr_warn_unused_result; /** * \brief Compares if two Index lists are identical */ -extern lzma_bool lzma_index_equal(const lzma_index *a, const lzma_index *b); +extern lzma_bool lzma_index_equal(const lzma_index *a, const lzma_index *b) + lzma_attr_pure; /** * \brief Initializes Index encoder */ -extern lzma_ret lzma_index_encoder(lzma_stream *strm, lzma_index *i); +extern lzma_ret lzma_index_encoder(lzma_stream *strm, lzma_index *i) + lzma_attr_warn_unused_result; /** * \brief Initializes Index decoder */ -extern lzma_ret lzma_index_decoder(lzma_stream *strm, lzma_index **i); +extern lzma_ret lzma_index_decoder(lzma_stream *strm, lzma_index **i) + lzma_attr_warn_unused_result; diff --git a/src/liblzma/api/lzma/index_hash.h b/src/liblzma/api/lzma/index_hash.h index 1edbbeaa..58fc8061 100644 --- a/src/liblzma/api/lzma/index_hash.h +++ b/src/liblzma/api/lzma/index_hash.h @@ -42,7 +42,8 @@ typedef struct lzma_index_hash_s lzma_index_hash; * pointer than the index_hash given as argument. */ extern lzma_index_hash *lzma_index_hash_init( - lzma_index_hash *index_hash, lzma_allocator *allocator); + lzma_index_hash *index_hash, lzma_allocator *allocator) + lzma_attr_warn_unused_result; /** @@ -66,7 +67,8 @@ 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 total_size, lzma_vli uncompressed_size) + lzma_attr_warn_unused_result; /** @@ -83,7 +85,8 @@ extern lzma_ret lzma_index_hash_append(lzma_index_hash *index_hash, * Records can be added using lzma_index_hash_append(). */ extern lzma_ret lzma_index_hash_decode(lzma_index_hash *index_hash, - const uint8_t *in, size_t *in_pos, size_t in_size); + const uint8_t *in, size_t *in_pos, size_t in_size) + lzma_attr_warn_unused_result; /** @@ -91,4 +94,5 @@ extern lzma_ret lzma_index_hash_decode(lzma_index_hash *index_hash, * * This is needed to verify the Index Size field from the Stream Footer. */ -extern lzma_vli lzma_index_hash_size(const lzma_index_hash *index_hash); +extern lzma_vli lzma_index_hash_size(const lzma_index_hash *index_hash) + lzma_attr_pure; diff --git a/src/liblzma/api/lzma/lzma.h b/src/liblzma/api/lzma/lzma.h index 9473f448..5a1cd912 100644 --- a/src/liblzma/api/lzma/lzma.h +++ b/src/liblzma/api/lzma/lzma.h @@ -24,43 +24,11 @@ /** * \brief Filter ID * - * Filter ID of the LZMA filter. This is used as lzma_options_filter.id. + * Filter ID of the LZMA filter. This is used as lzma_filter.id. */ #define LZMA_FILTER_LZMA LZMA_VLI_C(0x40) - -/** - * \brief LZMA compression modes - * - * Currently there are only two modes. Earlier LZMA SDKs had also third - * mode between fast and best. - */ -typedef enum { - LZMA_MODE_INVALID = -1, - /**< - * \brief Invalid mode - * - * Used as array terminator in lzma_available_modes. - */ - - - LZMA_MODE_FAST = 0, - /**< - * \brief Fast compression - * - * Fast mode is usually at its best when combined with - * a hash chain match finder. - */ - - LZMA_MODE_BEST = 2 - /**< - * \brief Best compression ratio - * - * This is usually notably slower than fast mode. Use this - * together with binary tree match finders to expose the - * full potential of the LZMA encoder. - */ -} lzma_mode; +#define LZMA_FILTER_LZMA2 LZMA_VLI_C(0x21) /** @@ -129,6 +97,72 @@ typedef enum { /** + * \brief Test if given match finder is supported + * + * Returns true if the given match finder is supported by this liblzma build. + * Otherwise false is returned. It is safe to call this with a value that + * isn't listed in lzma_match_finder enumeration; the return value will be + * false. + * + * There is no way to list which match finders are available in this + * particular liblzma version and build. It would be useless, because + * a new match finder, which the application developer wasn't aware, + * could require giving additional options to the encoder that the older + * match finders don't need. + */ +extern lzma_bool lzma_mf_is_supported(lzma_match_finder match_finder) + lzma_attr_const; + + +/** + * \brief LZMA compression modes + * + * This selects the function used to analyze the data produced by the match + * finder. + */ +typedef enum { + LZMA_MODE_INVALID = -1, + /**< + * \brief Invalid mode + * + * Used as array terminator in lzma_available_modes. + */ + + LZMA_MODE_FAST = 0, + /**< + * \brief Fast compression + * + * Fast mode is usually at its best when combined with + * a hash chain match finder. + */ + + LZMA_MODE_NORMAL = 1 + /**< + * \brief Normal compression + * + * This is usually notably slower than fast mode. Use this + * together with binary tree match finders to expose the + * full potential of the LZMA encoder. + */ +} lzma_mode; + + +/** + * \brief Test if given compression mode is supported + * + * Returns true if the given compression mode is supported by this liblzma + * build. Otherwise false is returned. It is safe to call this with a value + * that isn't listed in lzma_mode enumeration; the return value will be false. + * + * There is no way to list which modes are available in this particular + * liblzma version and build. It would be useless, because a new compression + * mode, which the application developer wasn't aware, could require giving + * additional options to the encoder that the older modes don't need. + */ +extern lzma_bool lzma_mode_is_available(lzma_mode mode) lzma_attr_const; + + +/** * \brief Options specific to the LZMA method handler */ typedef struct { @@ -157,6 +191,44 @@ typedef struct { # define LZMA_DICTIONARY_SIZE_DEFAULT (UINT32_C(1) << 23) /** + * \brief Pointer to an initial dictionary + * + * It is possible to initialize the LZ77 history window using + * a preset dictionary. Here is a good quote from zlib's + * documentation; this applies to LZMA as is: + * + * "The dictionary should consist of strings (byte sequences) that + * are likely to be encountered later in the data to be compressed, + * with the most commonly used strings preferably put towards the + * end of the dictionary. Using a dictionary is most useful when + * the data to be compressed is short and can be predicted with + * good accuracy; the data can then be compressed better than + * with the default empty dictionary." + * (From deflateSetDictionary() in zlib.h of zlib version 1.2.3) + * + * This feature should be used only in special situations. + * It works correctly only with raw encoding and decoding. + * Currently none of the container formats supported by + * liblzma allow preset dictionary when decoding, thus if + * you create a .lzma file with preset dictionary, it cannot + * be decoded with the regular .lzma decoder functions. + * + * \todo This feature is not implemented yet. + */ + const uint8_t *preset_dictionary; + + /** + * \brief Size of the preset dictionary + * + * Specifies the size of the preset dictionary. If the size is + * bigger than dictionary_size, only the last dictionary_size + * bytes are processed. + * + * This variable is read only when preset_dictionary is not NULL. + */ + uint32_t preset_dictionary_size; + + /** * \brief Number of literal context bits * * How many of the highest bits of the previous uncompressed @@ -203,47 +275,22 @@ typedef struct { # define LZMA_POS_BITS_MAX 4 # define LZMA_POS_BITS_DEFAULT 2 - /** - * \brief Pointer to an initial dictionary - * - * It is possible to initialize the LZ77 history window using - * a preset dictionary. Here is a good quote from zlib's - * documentation; this applies to LZMA as is: - * - * "The dictionary should consist of strings (byte sequences) that - * are likely to be encountered later in the data to be compressed, - * with the most commonly used strings preferably put towards the - * end of the dictionary. Using a dictionary is most useful when - * the data to be compressed is short and can be predicted with - * good accuracy; the data can then be compressed better than - * with the default empty dictionary." - * (From deflateSetDictionary() in zlib.h of zlib version 1.2.3) - * - * This feature should be used only in special situations. - * It works correctly only with raw encoding and decoding. - * Currently none of the container formats supported by - * liblzma allow preset dictionary when decoding, thus if - * you create a .lzma file with preset dictionary, it cannot - * be decoded with the regular .lzma decoder functions. - * - * \todo This feature is not implemented yet. - */ - const uint8_t *preset_dictionary; + /****************************************** + * LZMA options needed only when encoding * + ******************************************/ /** - * \brief Size of the preset dictionary + * \brief Indicate if the options structure is persistent * - * Specifies the size of the preset dictionary. If the size is - * bigger than dictionary_size, only the last dictionary_size - * bytes are processed. + * If this is true, the application must keep this options structure + * available after the LZMA2 encoder has been initialized. With + * persistent structure it is possible to change some encoder options + * in the middle of the encoding process without resetting the encoder. * - * This variable is read only when preset_dictionary is not NULL. + * This option is used only by LZMA2. LZMA1 ignores this and it is + * safeto not initialize this when encoding with LZMA1. */ - uint32_t preset_dictionary_size; - - /****************************************** - * LZMA options needed only when encoding * - ******************************************/ + lzma_bool persistent; /** LZMA compression mode */ lzma_mode mode; @@ -275,6 +322,20 @@ typedef struct { */ uint32_t match_finder_cycles; + /** + * \brief Reserved space for possible future extensions + * + * You should not touch these, because the names of these variables + * may change. These are and will never be used with the currently + * supported options, so it is safe to leave these uninitialized. + */ + uint32_t reserved_int1; + uint32_t reserved_int2; + uint32_t reserved_int3; + uint32_t reserved_int4; + void *reserved_ptr1; + void *reserved_ptr2; + } lzma_options_lzma; @@ -287,27 +348,6 @@ typedef struct { /** - * \brief Available LZMA encoding modes - * - * Pointer to an array containing the list of available encoding modes. - * - * This variable is available only if LZMA encoder has been enabled. - */ -extern const lzma_mode *const lzma_available_modes; - - -/** - * \brief Available match finders - * - * Pointer to an array containing the list of available match finders. - * The last element is LZMA_MF_INVALID. - * - * This variable is available only if LZMA encoder has been enabled. - */ -extern const lzma_match_finder *const lzma_available_match_finders; - - -/** * \brief Table of presets for the LZMA filter * * lzma_preset_lzma[0] is the fastest and lzma_preset_lzma[8] is the slowest. diff --git a/src/liblzma/api/lzma/memlimit.h b/src/liblzma/api/lzma/memlimit.h index 7a856a27..836b0854 100644 --- a/src/liblzma/api/lzma/memlimit.h +++ b/src/liblzma/api/lzma/memlimit.h @@ -58,7 +58,8 @@ typedef struct lzma_memlimit_s lzma_memlimit; * lzma_memlimit_ can be used even if lzma_init() hasn't been * called. */ -extern lzma_memlimit *lzma_memlimit_create(size_t limit); +extern lzma_memlimit *lzma_memlimit_create(size_t limit) + lzma_attr_warn_unused_result; /** @@ -79,7 +80,8 @@ extern void lzma_memlimit_set(lzma_memlimit *mem, size_t limit); /** * \brief Gets the current memory usage limit */ -extern size_t lzma_memlimit_get(const lzma_memlimit *mem); +extern size_t lzma_memlimit_get(const lzma_memlimit *mem) + lzma_attr_pure; /** @@ -89,7 +91,8 @@ extern size_t lzma_memlimit_get(const lzma_memlimit *mem); * thus it will always be larger than the total number of * bytes allocated via lzma_memlimit_alloc(). */ -extern size_t lzma_memlimit_used(const lzma_memlimit *mem); +extern size_t lzma_memlimit_used(const lzma_memlimit *mem) + lzma_attr_pure; /** @@ -134,7 +137,8 @@ extern lzma_bool lzma_memlimit_reached(lzma_memlimit *mem, lzma_bool clear); * been allocated with lzma_memlimit_alloc() or all memory allocated * has been freed or detached, this will return zero. */ -extern size_t lzma_memlimit_count(const lzma_memlimit *mem); +extern size_t lzma_memlimit_count(const lzma_memlimit *mem) + lzma_attr_pure; /** @@ -157,7 +161,8 @@ extern size_t lzma_memlimit_count(const lzma_memlimit *mem); * invalid amount of memory being allocated. */ extern void *lzma_memlimit_alloc( - lzma_memlimit *mem, size_t nmemb, size_t size); + lzma_memlimit *mem, size_t nmemb, size_t size) + lzma_attr_warn_unused_result; /** diff --git a/src/liblzma/api/lzma/raw.h b/src/liblzma/api/lzma/raw.h deleted file mode 100644 index db8cba15..00000000 --- a/src/liblzma/api/lzma/raw.h +++ /dev/null @@ -1,60 +0,0 @@ -/** - * \file lzma/raw.h - * \brief Raw encoder and decoder - * - * \author Copyright (C) 1999-2006 Igor Pavlov - * \author Copyright (C) 2007 Lasse Collin - * - * This library 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 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - */ - -#ifndef LZMA_H_INTERNAL -# error Never include this file directly. Use <lzma.h> instead. -#endif - - -/** - * \brief Initializes raw encoder - * - * This function may be useful when implementing custom file formats. - * - * \param strm Pointer to properly prepared lzma_stream - * \param options Array of lzma_options_filter structures. - * The end of the array must be marked with - * .id = LZMA_VLI_VALUE_UNKNOWN. The minimum - * number of filters is one and the maximum is four. - * - * The `action' with lzma_code() can be LZMA_RUN, LZMA_SYNC_FLUSH (if the - * filter chain supports it), or LZMA_FINISH. - * - * \return - LZMA_OK - * - LZMA_MEM_ERROR - * - LZMA_HEADER_ERROR - * - LZMA_PROG_ERROR - */ -extern lzma_ret lzma_raw_encoder( - lzma_stream *strm, const lzma_options_filter *options); - - -/** - * \brief Initializes raw decoder - * - * The initialization of raw decoder goes similarly to raw encoder. - * - * The `action' with lzma_code() can be LZMA_RUN or LZMA_SYNC_FLUSH. - * - * \return - LZMA_OK - * - LZMA_MEM_ERROR - * - LZMA_HEADER_ERROR - * - LZMA_PROG_ERROR - */ -extern lzma_ret lzma_raw_decoder( - lzma_stream *strm, const lzma_options_filter *options); diff --git a/src/liblzma/api/lzma/simple.h b/src/liblzma/api/lzma/simple.h index 807a4c46..13417480 100644 --- a/src/liblzma/api/lzma/simple.h +++ b/src/liblzma/api/lzma/simple.h @@ -21,7 +21,7 @@ #endif -/* Filter IDs for lzma_options_filter.id */ +/* Filter IDs for lzma_filter.id */ #define LZMA_FILTER_X86 LZMA_VLI_C(0x04) /**< diff --git a/src/liblzma/api/lzma/stream.h b/src/liblzma/api/lzma/stream.h deleted file mode 100644 index 4bb17e7d..00000000 --- a/src/liblzma/api/lzma/stream.h +++ /dev/null @@ -1,53 +0,0 @@ -/** - * \file lzma/stream.h - * \brief .lzma Stream handling - * - * \author Copyright (C) 1999-2006 Igor Pavlov - * \author Copyright (C) 2007 Lasse Collin - * - * This library 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 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - */ - -#ifndef LZMA_H_INTERNAL -# error Never include this file directly. Use <lzma.h> instead. -#endif - - -/** - * \brief Initializes .lzma Stream encoder - * - * \param strm Pointer to properly prepared lzma_stream - * \param filters Array of filters. This must be terminated with - * filters[n].id = LZMA_VLI_VALUE_UNKNOWN. There must - * be 1-4 filters, but there are restrictions on how - * multiple filters can be combined. FIXME Tell where - * to find more information. - * \param check Type of the integrity check to calculate from - * uncompressed data. - * - * \return - LZMA_OK: Initialization was successful. - * - LZMA_MEM_ERROR - * - LZMA_HEADER_ERROR - * - LZMA_PROG_ERROR - */ -extern lzma_ret lzma_stream_encoder(lzma_stream *strm, - const lzma_options_filter *filters, lzma_check_type check); - - -/** - * \brief Initializes decoder for .lzma Stream - * - * \param strm Pointer to propertily prepared lzma_stream - * - * \return - LZMA_OK: Initialization was successful. - * - LZMA_MEM_ERROR: Cannot allocate memory. - */ -extern lzma_ret lzma_stream_decoder(lzma_stream *strm); diff --git a/src/liblzma/api/lzma/stream_flags.h b/src/liblzma/api/lzma/stream_flags.h index f4c5c335..80c5f00f 100644 --- a/src/liblzma/api/lzma/stream_flags.h +++ b/src/liblzma/api/lzma/stream_flags.h @@ -46,7 +46,7 @@ typedef struct { /** * Type of the Check calculated from uncompressed data */ - lzma_check_type check; + lzma_check check; } lzma_stream_flags; @@ -64,7 +64,8 @@ typedef struct { * - LZMA_PROG_ERROR: Invalid options. */ extern lzma_ret lzma_stream_header_encode( - const lzma_stream_flags *options, uint8_t *out); + const lzma_stream_flags *options, uint8_t *out) + lzma_attr_warn_unused_result; /** @@ -78,7 +79,8 @@ extern lzma_ret lzma_stream_header_encode( * - LZMA_PROG_ERROR: Invalid options. */ extern lzma_ret lzma_stream_footer_encode( - const lzma_stream_flags *options, uint8_t *out); + const lzma_stream_flags *options, uint8_t *out) + lzma_attr_warn_unused_result; /** @@ -101,7 +103,8 @@ extern lzma_ret lzma_stream_footer_encode( * in the header. */ extern lzma_ret lzma_stream_header_decode( - lzma_stream_flags *options, const uint8_t *in); + lzma_stream_flags *options, const uint8_t *in) + lzma_attr_warn_unused_result; /** @@ -120,7 +123,8 @@ extern lzma_ret lzma_stream_header_decode( * in the footer. */ extern lzma_ret lzma_stream_footer_decode( - lzma_stream_flags *options, const uint8_t *in); + lzma_stream_flags *options, const uint8_t *in) + lzma_attr_warn_unused_result; /** @@ -131,4 +135,5 @@ extern lzma_ret lzma_stream_footer_decode( * \return true if both structures are considered equal; false otherwise. */ extern lzma_bool lzma_stream_flags_equal( - const lzma_stream_flags *a, lzma_stream_flags *b); + const lzma_stream_flags *a, const lzma_stream_flags *b) + lzma_attr_pure; diff --git a/src/liblzma/api/lzma/subblock.h b/src/liblzma/api/lzma/subblock.h index 1db35b13..b9a3025b 100644 --- a/src/liblzma/api/lzma/subblock.h +++ b/src/liblzma/api/lzma/subblock.h @@ -24,7 +24,7 @@ /** * \brief Filter ID * - * Filter ID of the Subblock filter. This is used as lzma_options_filter.id. + * Filter ID of the Subblock filter. This is used as lzma_filter.id. */ #define LZMA_FILTER_SUBBLOCK LZMA_VLI_C(0x01) @@ -199,6 +199,6 @@ typedef struct { * * \note This variable is ignored if allow_subfilters is false. */ - lzma_options_filter subfilter_options; + lzma_filter subfilter_options; } lzma_options_subblock; diff --git a/src/liblzma/api/lzma/version.h b/src/liblzma/api/lzma/version.h index 252458a3..811f93e0 100644 --- a/src/liblzma/api/lzma/version.h +++ b/src/liblzma/api/lzma/version.h @@ -41,17 +41,17 @@ /** * \brief liblzma version number as an integer * - * This is the value of LZMA_VERSION macro at the compile time of liblzma. + * Returns the value of LZMA_VERSION macro at the compile time of liblzma. * This allows the application to compare if it was built against the same, * older, or newer version of liblzma that is currently running. */ -extern const uint32_t lzma_version_number; +extern uint32_t lzma_version_number(void) lzma_attr_const; /** - * \brief Returns versions number of liblzma as a string + * \brief Version number of liblzma as a string * * This function may be useful if you want to display which version of - * libilzma your application is currently using. + * liblzma your application is currently using. */ -extern const char *const lzma_version_string; +extern const char *lzma_version_string(void) lzma_attr_const; diff --git a/src/liblzma/api/lzma/vli.h b/src/liblzma/api/lzma/vli.h index 15a9d0bf..294e5cdd 100644 --- a/src/liblzma/api/lzma/vli.h +++ b/src/liblzma/api/lzma/vli.h @@ -72,90 +72,24 @@ typedef uint64_t lzma_vli; /** - * \brief Sets VLI to given value with error checking - * - * \param dest Target variable which must have type of lzma_vli. - * \param src New value to be stored to dest. - * \param limit Maximum allowed value for src. - * - * \return False on success, true on error. If an error occurred, - * dest is left in undefined state (i.e. it's possible that - * it will be different in newer liblzma versions). - */ -#define lzma_vli_set_lim(dest, src, limit) \ - ((src) > (limit) || ((dest) = (src)) > (limit)) - -/** - * \brief - */ -#define lzma_vli_add_lim(dest, src, limit) \ - ((src) > (limit) || ((dest) += (src)) > (limit)) - -#define lzma_vli_add2_lim(dest, src1, src2, limit) \ - (lzma_vli_add_lim(dest, src1, limit) \ - || lzma_vli_add_lim(dest, src2, limit)) - -#define lzma_vli_add3_lim(dest, src1, src2, src3, limit) \ - (lzma_vli_add_lim(dest, src1, limit) \ - || lzma_vli_add_lim(dest, src2, limit) \ - || lzma_vli_add_lim(dest, src3, limit)) - -#define lzma_vli_add4_lim(dest, src1, src2, src3, src4, limit) \ - (lzma_vli_add_lim(dest, src1, limit) \ - || lzma_vli_add_lim(dest, src2, limit) \ - || lzma_vli_add_lim(dest, src3, limit) \ - || lzma_vli_add_lim(dest, src4, limit)) - -#define lzma_vli_sum_lim(dest, src1, src2, limit) \ - (lzma_vli_set_lim(dest, src1, limit) \ - || lzma_vli_add_lim(dest, src2, limit)) - -#define lzma_vli_sum3_lim(dest, src1, src2, src3, limit) \ - (lzma_vli_set_lim(dest, src1, limit) \ - || lzma_vli_add_lim(dest, src2, limit) \ - || lzma_vli_add_lim(dest, src3, limit)) - -#define lzma_vli_sum4_lim(dest, src1, src2, src3, src4, limit) \ - (lzma_vli_set_lim(dest, src1, limit) \ - || lzma_vli_add_lim(dest, src2, limit) \ - || lzma_vli_add_lim(dest, src3, limit) \ - || lzma_vli_add_lim(dest, src4, limit)) - -#define lzma_vli_set(dest, src) lzma_vli_set_lim(dest, src, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_add(dest, src) lzma_vli_add_lim(dest, src, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_add2(dest, src1, src2) \ - lzma_vli_add2_lim(dest, src1, src2, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_add3(dest, src1, src2, src3) \ - lzma_vli_add3_lim(dest, src1, src2, src3, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_add4(dest, src1, src2, src3, src4) \ - lzma_vli_add4_lim(dest, src1, src2, src3, src4, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_sum(dest, src1, src2) \ - lzma_vli_sum_lim(dest, src1, src2, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_sum3(dest, src1, src2, src3) \ - lzma_vli_sum3_lim(dest, src1, src2, src3, LZMA_VLI_VALUE_MAX) - -#define lzma_vli_sum4(dest, src1, src2, src3, src4) \ - lzma_vli_sum4_lim(dest, src1, src2, src3, src4, LZMA_VLI_VALUE_MAX) - - -/** * \brief Encodes variable-length integer * - * In the new .lzma format, most integers are encoded in variable-length + * In the .lzma format, most integers are encoded in variable-length * representation. This saves space when smaller values are more likely * than bigger values. * * The encoding scheme encodes seven bits to every byte, using minimum - * number of bytes required to represent the given value. In other words, - * it puts 7-63 bits into 1-9 bytes. This implementation limits the number - * of bits used to 63, thus num must be at maximum of UINT64_MAX / 2. You - * may use LZMA_VLI_VALUE_MAX for clarity. + * number of bytes required to represent the given value. Encodings that use + * non-minimum number of bytes are invalid, thus every integer has exactly + * one encoded representation. The maximum number of bits in a VLI is 63, + * thus the vli argument must be at maximum of UINT64_MAX / 2. You should + * use LZMA_VLI_VALUE_MAX for clarity. + * + * This function has two modes: single-call and multi-call. Single-call mode + * encodes the whole integer at once; it is an error if the output buffer is + * too small. Multi-call mode saves the position in *vli_pos, and thus it is + * possible to continue encoding if the buffer becomes full before the whole + * integer has been encoded. * * \param vli Integer to be encoded * \param vli_pos How many VLI-encoded bytes have already been written @@ -170,19 +104,19 @@ typedef uint64_t lzma_vli; * \return Slightly different return values are used in multi-call and * single-call modes. * + * Single-call (vli_pos == NULL): + * - LZMA_OK: Integer successfully encoded. + * - LZMA_PROG_ERROR: Arguments are not sane. This can be due + * to too little output space; single-call mode doesn't use + * LZMA_BUF_ERROR, since the application should have checked + * the encoded size with lzma_vli_size(). + * * Multi-call (vli_pos != NULL): * - LZMA_OK: So far all OK, but the integer is not * completely written out yet. * - LZMA_STREAM_END: Integer successfully encoded. - * - LZMA_PROG_ERROR: Arguments are not sane. This can be due - * to no *out_pos == out_size; this function doesn't use - * LZMA_BUF_ERROR. - * - * Single-call (vli_pos == NULL): - * - LZMA_OK: Integer successfully encoded. - * - LZMA_PROG_ERROR: Arguments are not sane. This can be due - * to too little output space; this function doesn't use - * LZMA_BUF_ERROR. + * - LZMA_BUF_ERROR: No output space was provided. + * - LZMA_PROG_ERROR: Arguments are not sane. */ extern lzma_ret lzma_vli_encode( lzma_vli vli, size_t *lzma_restrict vli_pos, @@ -193,6 +127,8 @@ extern lzma_ret lzma_vli_encode( /** * \brief Decodes variable-length integer * + * Like lzma_vli_encode(), this function has single-call and multi-call modes. + * * \param vli Pointer to decoded integer. The decoder will * initialize it to zero when *vli_pos == 0, so * application isn't required to initialize *vli. @@ -208,20 +144,20 @@ extern lzma_ret lzma_vli_encode( * \return Slightly different return values are used in multi-call and * single-call modes. * + * Single-call (vli_pos == NULL): + * - LZMA_OK: Integer successfully decoded. + * - LZMA_DATA_ERROR: Integer is corrupt. This includes hitting + * the end of the input buffer before the whole integer was + * decoded; providing no input at all will use LZMA_DATA_ERROR. + * - LZMA_PROG_ERROR: Arguments are not sane. + * * Multi-call (vli_pos != NULL): * - LZMA_OK: So far all OK, but the integer is not * completely decoded yet. * - LZMA_STREAM_END: Integer successfully decoded. * - LZMA_DATA_ERROR: Integer is corrupt. - * - LZMA_PROG_ERROR: Arguments are not sane. This can be - * due to *in_pos == in_size; this function doesn't use - * LZMA_BUF_ERROR. - * - * Single-call (vli_pos == NULL): - * - LZMA_OK: Integer successfully decoded. - * - LZMA_DATA_ERROR: Integer is corrupt. - * - LZMA_PROG_ERROR: Arguments are not sane. This can be due to - * too little input; this function doesn't use LZMA_BUF_ERROR. + * - LZMA_BUF_ERROR: No input was provided. + * - LZMA_PROG_ERROR: Arguments are not sane. */ extern lzma_ret lzma_vli_decode(lzma_vli *lzma_restrict vli, size_t *lzma_restrict vli_pos, const uint8_t *lzma_restrict in, @@ -234,4 +170,5 @@ extern lzma_ret lzma_vli_decode(lzma_vli *lzma_restrict vli, * \return Number of bytes on success (1-9). If vli isn't valid, * zero is returned. */ -extern uint32_t lzma_vli_size(lzma_vli vli); +extern uint32_t lzma_vli_size(lzma_vli vli) + lzma_attr_pure; |