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3858932ec4
* feat!: add libzim dependency * 🎨 apply clang-format changes * action: add libzim dependency to action * feat!: change dependency folder * action: add zim support * feat!: add libzim support * action: fix sonarcloud check * doc: add libzim readme * action: cmake build * action: cmake check * fix: code smell * action: cmake check * action: cmake on Macos * action: cmake on Macos * feat: use libzim to read title and description * 🎨 apply clang-format changes * feat: split zim file support * feat: loadArticle refactor * 🎨 apply clang-format changes * 🎨 apply clang-format changes * feat: update library and goldendict.pro * 🎨 apply clang-format changes * fix:word count * 🎨 apply clang-format changes * fix: video src url subsititue * 🎨 apply clang-format changes * zim: headword is not usually a valid it is from title and url. * fix: remove nested try catch * zim: fix resource loading issue. * 🎨 apply clang-format changes * action: remove libao * zim: process url some old zim dictionary url does not contain namespace such as /C/url make the old and new zim dictionary's url consistent without the leading ../C/ etc. * 🎨 apply clang-format changes * zim: process url remove leading dot and slash such as ../-/assets ,remove ../ * 🎨 apply clang-format changes * zim: remove resourceIndex creation use libzim to read the resource directly. * zim: only iterate all the articles * 🎨 apply clang-format changes * fix: code smell * 🎨 apply clang-format changes * zim: refactor method to convert url to wstring * 🎨 apply clang-format changes * fix:code smell * 🎨 apply clang-format changes * zim: update windows dependencies * zim: add mutex lock * 🎨 apply clang-format changes * fix: code smell * 🎨 apply clang-format changes --------- Co-authored-by: xiaoyifang <xiaoyifang@users.noreply.github.com> Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
900 lines
38 KiB
C
900 lines
38 KiB
C
/**
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* \file lzma/container.h
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* \brief File formats
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*/
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/*
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* Author: Lasse Collin
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*
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* This file has been put into the public domain.
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* You can do whatever you want with this file.
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*
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* See ../lzma.h for information about liblzma as a whole.
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*/
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#ifndef LZMA_H_INTERNAL
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# error Never include this file directly. Use <lzma.h> instead.
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#endif
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/************
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* Encoding *
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************/
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/**
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* \brief Default compression preset
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*
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* It's not straightforward to recommend a default preset, because in some
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* cases keeping the resource usage relatively low is more important that
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* getting the maximum compression ratio.
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*/
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#define LZMA_PRESET_DEFAULT UINT32_C(6)
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/**
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* \brief Mask for preset level
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*
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* This is useful only if you need to extract the level from the preset
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* variable. That should be rare.
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*/
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#define LZMA_PRESET_LEVEL_MASK UINT32_C(0x1F)
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/*
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* Preset flags
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*
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* Currently only one flag is defined.
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*/
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/**
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* \brief Extreme compression preset
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*
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* This flag modifies the preset to make the encoding significantly slower
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* while improving the compression ratio only marginally. This is useful
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* when you don't mind wasting time to get as small result as possible.
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*
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* This flag doesn't affect the memory usage requirements of the decoder (at
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* least not significantly). The memory usage of the encoder may be increased
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* a little but only at the lowest preset levels (0-3).
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*/
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#define LZMA_PRESET_EXTREME (UINT32_C(1) << 31)
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/**
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* \brief Multithreading options
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*/
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typedef struct {
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/**
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* \brief Flags
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*
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* Set this to zero if no flags are wanted.
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*
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* Encoder: No flags are currently supported.
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*
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* Decoder: Bitwise-or of zero or more of the decoder flags:
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* LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
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* LZMA_TELL_ANY_CHECK, LZMA_IGNORE_CHECK,
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* LZMA_CONCATENATED, LZMA_FAIL_FAST
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*/
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uint32_t flags;
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/**
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* \brief Number of worker threads to use
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*/
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uint32_t threads;
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/**
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* \brief Encoder only: Maximum uncompressed size of a Block
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*
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* The encoder will start a new .xz Block every block_size bytes.
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* Using LZMA_FULL_FLUSH or LZMA_FULL_BARRIER with lzma_code()
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* the caller may tell liblzma to start a new Block earlier.
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*
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* With LZMA2, a recommended block size is 2-4 times the LZMA2
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* dictionary size. With very small dictionaries, it is recommended
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* to use at least 1 MiB block size for good compression ratio, even
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* if this is more than four times the dictionary size. Note that
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* these are only recommendations for typical use cases; feel free
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* to use other values. Just keep in mind that using a block size
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* less than the LZMA2 dictionary size is waste of RAM.
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*
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* Set this to 0 to let liblzma choose the block size depending
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* on the compression options. For LZMA2 it will be 3*dict_size
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* or 1 MiB, whichever is more.
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*
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* For each thread, about 3 * block_size bytes of memory will be
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* allocated. This may change in later liblzma versions. If so,
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* the memory usage will probably be reduced, not increased.
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*/
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uint64_t block_size;
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/**
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* \brief Timeout to allow lzma_code() to return early
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*
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* Multithreading can make liblzma to consume input and produce
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* output in a very bursty way: it may first read a lot of input
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* to fill internal buffers, then no input or output occurs for
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* a while.
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*
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* In single-threaded mode, lzma_code() won't return until it has
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* either consumed all the input or filled the output buffer. If
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* this is done in multithreaded mode, it may cause a call
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* lzma_code() to take even tens of seconds, which isn't acceptable
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* in all applications.
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*
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* To avoid very long blocking times in lzma_code(), a timeout
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* (in milliseconds) may be set here. If lzma_code() would block
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* longer than this number of milliseconds, it will return with
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* LZMA_OK. Reasonable values are 100 ms or more. The xz command
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* line tool uses 300 ms.
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*
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* If long blocking times are fine for you, set timeout to a special
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* value of 0, which will disable the timeout mechanism and will make
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* lzma_code() block until all the input is consumed or the output
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* buffer has been filled.
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*
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* \note Even with a timeout, lzma_code() might sometimes take
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* somewhat long time to return. No timing guarantees
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* are made.
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*/
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uint32_t timeout;
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/**
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* \brief Encoder only: Compression preset
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*
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* The preset is set just like with lzma_easy_encoder().
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* The preset is ignored if filters below is non-NULL.
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*/
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uint32_t preset;
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/**
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* \brief Encoder only: Filter chain (alternative to a preset)
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*
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* If this is NULL, the preset above is used. Otherwise the preset
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* is ignored and the filter chain specified here is used.
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*/
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const lzma_filter * filters;
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/**
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* \brief Encoder only: Integrity check type
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*
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* See check.h for available checks. The xz command line tool
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* defaults to LZMA_CHECK_CRC64, which is a good choice if you
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* are unsure.
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*/
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lzma_check check;
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/*
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* Reserved space to allow possible future extensions without
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* breaking the ABI. You should not touch these, because the names
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* of these variables may change. These are and will never be used
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* with the currently supported options, so it is safe to leave these
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* uninitialized.
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*/
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lzma_reserved_enum reserved_enum1;
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lzma_reserved_enum reserved_enum2;
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lzma_reserved_enum reserved_enum3;
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uint32_t reserved_int1;
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uint32_t reserved_int2;
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uint32_t reserved_int3;
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uint32_t reserved_int4;
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/**
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* \brief Memory usage limit to reduce the number of threads
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*
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* Encoder: Ignored.
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*
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* Decoder:
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*
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* If the number of threads has been set so high that more than
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* memlimit_threading bytes of memory would be needed, the number
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* of threads will be reduced so that the memory usage will not exceed
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* memlimit_threading bytes. However, if memlimit_threading cannot
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* be met even in single-threaded mode, then decoding will continue
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* in single-threaded mode and memlimit_threading may be exceeded
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* even by a large amount. That is, memlimit_threading will never make
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* lzma_code() return LZMA_MEMLIMIT_ERROR. To truly cap the memory
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* usage, see memlimit_stop below.
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*
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* Setting memlimit_threading to UINT64_MAX or a similar huge value
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* means that liblzma is allowed to keep the whole compressed file
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* and the whole uncompressed file in memory in addition to the memory
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* needed by the decompressor data structures used by each thread!
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* In other words, a reasonable value limit must be set here or it
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* will cause problems sooner or later. If you have no idea what
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* a reasonable value could be, try lzma_physmem() / 4 as a starting
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* point. Setting this limit will never prevent decompression of
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* a file; this will only reduce the number of threads.
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*
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* If memlimit_threading is greater than memlimit_stop, then the value
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* of memlimit_stop will be used for both.
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*/
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uint64_t memlimit_threading;
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/**
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* \brief Memory usage limit that should never be exceeded
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*
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* Encoder: Ignored.
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*
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* Decoder: If decompressing will need more than this amount of
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* memory even in the single-threaded mode, then lzma_code() will
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* return LZMA_MEMLIMIT_ERROR.
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*/
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uint64_t memlimit_stop;
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uint64_t reserved_int7;
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uint64_t reserved_int8;
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void * reserved_ptr1;
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void * reserved_ptr2;
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void * reserved_ptr3;
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void * reserved_ptr4;
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} lzma_mt;
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/**
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* \brief Calculate approximate memory usage of easy encoder
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*
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* This function is a wrapper for lzma_raw_encoder_memusage().
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*
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* \param preset Compression preset (level and possible flags)
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*
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* \return Number of bytes of memory required for the given
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* preset when encoding. If an error occurs, for example
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* due to unsupported preset, UINT64_MAX is returned.
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*/
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extern LZMA_API(uint64_t) lzma_easy_encoder_memusage(uint32_t preset)
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lzma_nothrow lzma_attr_pure;
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/**
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* \brief Calculate approximate decoder memory usage of a preset
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*
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* This function is a wrapper for lzma_raw_decoder_memusage().
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*
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* \param preset Compression preset (level and possible flags)
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*
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* \return Number of bytes of memory required to decompress a file
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* that was compressed using the given preset. If an error
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* occurs, for example due to unsupported preset, UINT64_MAX
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* is returned.
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*/
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extern LZMA_API(uint64_t) lzma_easy_decoder_memusage(uint32_t preset)
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lzma_nothrow lzma_attr_pure;
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/**
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* \brief Initialize .xz Stream encoder using a preset number
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*
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* This function is intended for those who just want to use the basic features
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* if liblzma (that is, most developers out there).
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*
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* \param strm Pointer to lzma_stream that is at least initialized
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* with LZMA_STREAM_INIT.
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* \param preset Compression preset to use. A preset consist of level
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* number and zero or more flags. Usually flags aren't
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* used, so preset is simply a number [0, 9] which match
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* the options -0 ... -9 of the xz command line tool.
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* Additional flags can be be set using bitwise-or with
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* the preset level number, e.g. 6 | LZMA_PRESET_EXTREME.
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* \param check Integrity check type to use. See check.h for available
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* checks. The xz command line tool defaults to
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* LZMA_CHECK_CRC64, which is a good choice if you are
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* unsure. LZMA_CHECK_CRC32 is good too as long as the
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* uncompressed file is not many gigabytes.
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*
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* \return - LZMA_OK: Initialization succeeded. Use lzma_code() to
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* encode your data.
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* - LZMA_MEM_ERROR: Memory allocation failed.
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* - LZMA_OPTIONS_ERROR: The given compression preset is not
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* supported by this build of liblzma.
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* - LZMA_UNSUPPORTED_CHECK: The given check type is not
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* supported by this liblzma build.
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* - LZMA_PROG_ERROR: One or more of the parameters have values
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* that will never be valid. For example, strm == NULL.
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*
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* If initialization fails (return value is not LZMA_OK), all the memory
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* allocated for *strm by liblzma is always freed. Thus, there is no need
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* to call lzma_end() after failed initialization.
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*
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* If initialization succeeds, use lzma_code() to do the actual encoding.
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* Valid values for `action' (the second argument of lzma_code()) are
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* LZMA_RUN, LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, and LZMA_FINISH. In future,
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* there may be compression levels or flags that don't support LZMA_SYNC_FLUSH.
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*/
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extern LZMA_API(lzma_ret) lzma_easy_encoder(
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lzma_stream *strm, uint32_t preset, lzma_check check)
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lzma_nothrow lzma_attr_warn_unused_result;
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/**
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* \brief Single-call .xz Stream encoding using a preset number
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*
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* The maximum required output buffer size can be calculated with
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* lzma_stream_buffer_bound().
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*
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* \param preset Compression preset to use. See the description
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* in lzma_easy_encoder().
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* \param check Type of the integrity check to calculate from
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* uncompressed data.
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* \param allocator lzma_allocator for custom allocator functions.
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* Set to NULL to use malloc() and free().
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* \param in Beginning of the input buffer
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* \param in_size Size of the input buffer
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* \param out Beginning of the output buffer
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* \param out_pos The next byte will be written to out[*out_pos].
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* *out_pos is updated only if encoding succeeds.
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* \param out_size Size of the out buffer; the first byte into
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* which no data is written to is out[out_size].
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*
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* \return - LZMA_OK: Encoding was successful.
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* - LZMA_BUF_ERROR: Not enough output buffer space.
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* - LZMA_UNSUPPORTED_CHECK
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* - LZMA_OPTIONS_ERROR
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* - LZMA_MEM_ERROR
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* - LZMA_DATA_ERROR
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* - LZMA_PROG_ERROR
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*/
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extern LZMA_API(lzma_ret) lzma_easy_buffer_encode(
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uint32_t preset, lzma_check check,
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const lzma_allocator *allocator,
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const uint8_t *in, size_t in_size,
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uint8_t *out, size_t *out_pos, size_t out_size) lzma_nothrow;
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/**
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* \brief Initialize .xz Stream encoder using a custom filter chain
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*
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* \param strm Pointer to properly prepared lzma_stream
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* \param filters Array of filters. This must be terminated with
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* filters[n].id = LZMA_VLI_UNKNOWN. See filter.h for
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* more information.
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* \param check Type of the integrity check to calculate from
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* uncompressed data.
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*
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* \return - LZMA_OK: Initialization was successful.
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* - LZMA_MEM_ERROR
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* - LZMA_UNSUPPORTED_CHECK
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* - LZMA_OPTIONS_ERROR
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* - LZMA_PROG_ERROR
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*/
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extern LZMA_API(lzma_ret) lzma_stream_encoder(lzma_stream *strm,
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const lzma_filter *filters, lzma_check check)
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lzma_nothrow lzma_attr_warn_unused_result;
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/**
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* \brief Calculate approximate memory usage of multithreaded .xz encoder
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*
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* Since doing the encoding in threaded mode doesn't affect the memory
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* requirements of single-threaded decompressor, you can use
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* lzma_easy_decoder_memusage(options->preset) or
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* lzma_raw_decoder_memusage(options->filters) to calculate
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* the decompressor memory requirements.
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*
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* \param options Compression options
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*
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* \return Number of bytes of memory required for encoding with the
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* given options. If an error occurs, for example due to
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* unsupported preset or filter chain, UINT64_MAX is returned.
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*/
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extern LZMA_API(uint64_t) lzma_stream_encoder_mt_memusage(
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const lzma_mt *options) lzma_nothrow lzma_attr_pure;
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/**
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* \brief Initialize multithreaded .xz Stream encoder
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*
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* This provides the functionality of lzma_easy_encoder() and
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* lzma_stream_encoder() as a single function for multithreaded use.
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*
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* The supported actions for lzma_code() are LZMA_RUN, LZMA_FULL_FLUSH,
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* LZMA_FULL_BARRIER, and LZMA_FINISH. Support for LZMA_SYNC_FLUSH might be
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* added in the future.
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*
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* \param strm Pointer to properly prepared lzma_stream
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* \param options Pointer to multithreaded compression options
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*
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* \return - LZMA_OK
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* - LZMA_MEM_ERROR
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* - LZMA_UNSUPPORTED_CHECK
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* - LZMA_OPTIONS_ERROR
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* - LZMA_PROG_ERROR
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*/
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extern LZMA_API(lzma_ret) lzma_stream_encoder_mt(
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lzma_stream *strm, const lzma_mt *options)
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lzma_nothrow lzma_attr_warn_unused_result;
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/**
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* \brief Initialize .lzma encoder (legacy file format)
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*
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* The .lzma format is sometimes called the LZMA_Alone format, which is the
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* reason for the name of this function. The .lzma format supports only the
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* LZMA1 filter. There is no support for integrity checks like CRC32.
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*
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* Use this function if and only if you need to create files readable by
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* legacy LZMA tools such as LZMA Utils 4.32.x. Moving to the .xz format
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* is strongly recommended.
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*
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* The valid action values for lzma_code() are LZMA_RUN and LZMA_FINISH.
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* No kind of flushing is supported, because the file format doesn't make
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* it possible.
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*
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* \return - LZMA_OK
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* - LZMA_MEM_ERROR
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* - LZMA_OPTIONS_ERROR
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* - LZMA_PROG_ERROR
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*/
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extern LZMA_API(lzma_ret) lzma_alone_encoder(
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lzma_stream *strm, const lzma_options_lzma *options)
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lzma_nothrow lzma_attr_warn_unused_result;
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/**
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* \brief Calculate output buffer size for single-call Stream encoder
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*
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* When trying to compress uncompressible data, the encoded size will be
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* slightly bigger than the input data. This function calculates how much
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* output buffer space is required to be sure that lzma_stream_buffer_encode()
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* doesn't return LZMA_BUF_ERROR.
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*
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* The calculated value is not exact, but it is guaranteed to be big enough.
|
|
* The actual maximum output space required may be slightly smaller (up to
|
|
* about 100 bytes). This should not be a problem in practice.
|
|
*
|
|
* If the calculated maximum size doesn't fit into size_t or would make the
|
|
* Stream grow past LZMA_VLI_MAX (which should never happen in practice),
|
|
* zero is returned to indicate the error.
|
|
*
|
|
* \note The limit calculated by this function applies only to
|
|
* single-call encoding. Multi-call encoding may (and probably
|
|
* will) have larger maximum expansion when encoding
|
|
* uncompressible data. Currently there is no function to
|
|
* calculate the maximum expansion of multi-call encoding.
|
|
*/
|
|
extern LZMA_API(size_t) lzma_stream_buffer_bound(size_t uncompressed_size)
|
|
lzma_nothrow;
|
|
|
|
|
|
/**
|
|
* \brief Single-call .xz Stream encoder
|
|
*
|
|
* \param filters Array of filters. This must be terminated with
|
|
* filters[n].id = LZMA_VLI_UNKNOWN. See filter.h
|
|
* for more information.
|
|
* \param check Type of the integrity check to calculate from
|
|
* uncompressed data.
|
|
* \param allocator lzma_allocator for custom allocator functions.
|
|
* Set to NULL to use malloc() and free().
|
|
* \param in Beginning of the input buffer
|
|
* \param in_size Size of the input buffer
|
|
* \param out Beginning of the output buffer
|
|
* \param out_pos The next byte will be written to out[*out_pos].
|
|
* *out_pos is updated only if encoding succeeds.
|
|
* \param out_size Size of the out buffer; the first byte into
|
|
* which no data is written to is out[out_size].
|
|
*
|
|
* \return - LZMA_OK: Encoding was successful.
|
|
* - LZMA_BUF_ERROR: Not enough output buffer space.
|
|
* - LZMA_UNSUPPORTED_CHECK
|
|
* - LZMA_OPTIONS_ERROR
|
|
* - LZMA_MEM_ERROR
|
|
* - LZMA_DATA_ERROR
|
|
* - LZMA_PROG_ERROR
|
|
*/
|
|
extern LZMA_API(lzma_ret) lzma_stream_buffer_encode(
|
|
lzma_filter *filters, lzma_check check,
|
|
const lzma_allocator *allocator,
|
|
const uint8_t *in, size_t in_size,
|
|
uint8_t *out, size_t *out_pos, size_t out_size)
|
|
lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
|
/**
|
|
* \brief MicroLZMA encoder
|
|
*
|
|
* The MicroLZMA format is a raw LZMA stream whose first byte (always 0x00)
|
|
* has been replaced with bitwise-negation of the LZMA properties (lc/lp/pb).
|
|
* This encoding ensures that the first byte of MicroLZMA stream is never
|
|
* 0x00. There is no end of payload marker and thus the uncompressed size
|
|
* must be stored separately. For the best error detection the dictionary
|
|
* size should be stored separately as well but alternatively one may use
|
|
* the uncompressed size as the dictionary size when decoding.
|
|
*
|
|
* With the MicroLZMA encoder, lzma_code() behaves slightly unusually.
|
|
* The action argument must be LZMA_FINISH and the return value will never be
|
|
* LZMA_OK. Thus the encoding is always done with a single lzma_code() after
|
|
* the initialization. The benefit of the combination of initialization
|
|
* function and lzma_code() is that memory allocations can be re-used for
|
|
* better performance.
|
|
*
|
|
* lzma_code() will try to encode as much input as is possible to fit into
|
|
* the given output buffer. If not all input can be encoded, the stream will
|
|
* be finished without encoding all the input. The caller must check both
|
|
* input and output buffer usage after lzma_code() (total_in and total_out
|
|
* in lzma_stream can be convenient). Often lzma_code() can fill the output
|
|
* buffer completely if there is a lot of input, but sometimes a few bytes
|
|
* may remain unused because the next LZMA symbol would require more space.
|
|
*
|
|
* lzma_stream.avail_out must be at least 6. Otherwise LZMA_PROG_ERROR
|
|
* will be returned.
|
|
*
|
|
* The LZMA dictionary should be reasonably low to speed up the encoder
|
|
* re-initialization. A good value is bigger than the resulting
|
|
* uncompressed size of most of the output chunks. For example, if output
|
|
* size is 4 KiB, dictionary size of 32 KiB or 64 KiB is good. If the
|
|
* data compresses extremely well, even 128 KiB may be useful.
|
|
*
|
|
* The MicroLZMA format and this encoder variant were made with the EROFS
|
|
* file system in mind. This format may be convenient in other embedded
|
|
* uses too where many small streams are needed. XZ Embedded includes a
|
|
* decoder for this format.
|
|
*
|
|
* \return - LZMA_STREAM_END: All good. Check the amounts of input used
|
|
* and output produced. Store the amount of input used
|
|
* (uncompressed size) as it needs to be known to decompress
|
|
* the data.
|
|
* - LZMA_OPTIONS_ERROR
|
|
* - LZMA_MEM_ERROR
|
|
* - LZMA_PROG_ERROR: In addition to the generic reasons for this
|
|
* error code, this may also be returned if there isn't enough
|
|
* output space (6 bytes) to create a valid MicroLZMA stream.
|
|
*/
|
|
extern LZMA_API( lzma_ret ) lzma_microlzma_encoder( lzma_stream * strm, const lzma_options_lzma * options );
|
|
|
|
|
|
/************
|
|
* 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 files will trigger LZMA_NO_CHECK
|
|
* if LZMA_TELL_NO_CHECK is used.
|
|
*/
|
|
#define LZMA_TELL_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_TELL_UNSUPPORTED_CHECK UINT32_C(0x02)
|
|
|
|
|
|
/**
|
|
* This flag makes lzma_code() return LZMA_GET_CHECK as soon as the type
|
|
* of the integrity check is known. The type can then be got with
|
|
* lzma_get_check().
|
|
*/
|
|
#define LZMA_TELL_ANY_CHECK UINT32_C(0x04)
|
|
|
|
|
|
/**
|
|
* This flag makes lzma_code() not calculate and verify the integrity check
|
|
* of the compressed data in .xz files. This means that invalid integrity
|
|
* check values won't be detected and LZMA_DATA_ERROR won't be returned in
|
|
* such cases.
|
|
*
|
|
* This flag only affects the checks of the compressed data itself; the CRC32
|
|
* values in the .xz headers will still be verified normally.
|
|
*
|
|
* Don't use this flag unless you know what you are doing. Possible reasons
|
|
* to use this flag:
|
|
*
|
|
* - Trying to recover data from a corrupt .xz file.
|
|
*
|
|
* - Speeding up decompression, which matters mostly with SHA-256
|
|
* or with files that have compressed extremely well. It's recommended
|
|
* to not use this flag for this purpose unless the file integrity is
|
|
* verified externally in some other way.
|
|
*
|
|
* Support for this flag was added in liblzma 5.1.4beta.
|
|
*/
|
|
#define LZMA_IGNORE_CHECK UINT32_C(0x10)
|
|
|
|
|
|
/**
|
|
* This flag enables decoding of concatenated files with file formats that
|
|
* allow concatenating compressed files as is. From the formats currently
|
|
* supported by liblzma, only the .xz and .lz formats allow concatenated
|
|
* files. Concatenated files are not allowed with the legacy .lzma format.
|
|
*
|
|
* This flag also affects the usage of the `action' argument for lzma_code().
|
|
* When LZMA_CONCATENATED is used, lzma_code() won't return LZMA_STREAM_END
|
|
* unless LZMA_FINISH is used as `action'. Thus, the application has to set
|
|
* LZMA_FINISH in the same way as it does when encoding.
|
|
*
|
|
* If LZMA_CONCATENATED is not used, the decoders still accept LZMA_FINISH
|
|
* as `action' for lzma_code(), but the usage of LZMA_FINISH isn't required.
|
|
*/
|
|
#define LZMA_CONCATENATED UINT32_C(0x08)
|
|
|
|
|
|
/**
|
|
* This flag makes the threaded decoder report errors (like LZMA_DATA_ERROR)
|
|
* as soon as they are detected. This saves time when the application has no
|
|
* interest in a partially decompressed truncated or corrupt file. Note that
|
|
* due to timing randomness, if the same truncated or corrupt input is
|
|
* decompressed multiple times with this flag, a different amount of output
|
|
* may be produced by different runs, and even the error code might vary.
|
|
*
|
|
* When using LZMA_FAIL_FAST, it is recommended to use LZMA_FINISH to tell
|
|
* the decoder when no more input will be coming because it can help fast
|
|
* detection and reporting of truncated files. Note that in this situation
|
|
* truncated files might be diagnosed with LZMA_DATA_ERROR instead of
|
|
* LZMA_OK or LZMA_BUF_ERROR!
|
|
*
|
|
* Without this flag the threaded decoder will provide as much output as
|
|
* possible at first and then report the pending error. This default behavior
|
|
* matches the single-threaded decoder and provides repeatable behavior
|
|
* with truncated or corrupt input. There are a few special cases where the
|
|
* behavior can still differ like memory allocation failures (LZMA_MEM_ERROR).
|
|
*
|
|
* Single-threaded decoders currently ignore this flag.
|
|
*
|
|
* Support for this flag was added in liblzma 5.3.3alpha. Note that in older
|
|
* versions this flag isn't supported (LZMA_OPTIONS_ERROR) even by functions
|
|
* that ignore this flag in newer liblzma versions.
|
|
*/
|
|
#define LZMA_FAIL_FAST UINT32_C( 0x20 )
|
|
|
|
|
|
/**
|
|
* \brief Initialize .xz Stream decoder
|
|
*
|
|
* \param strm Pointer to properly prepared lzma_stream
|
|
* \param memlimit Memory usage limit as bytes. Use UINT64_MAX
|
|
* to effectively disable the limiter. liblzma
|
|
* 5.2.3 and earlier don't allow 0 here and return
|
|
* LZMA_PROG_ERROR; later versions treat 0 as if 1
|
|
* had been specified.
|
|
* \param flags Bitwise-or of zero or more of the decoder flags:
|
|
* LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
|
|
* LZMA_TELL_ANY_CHECK, LZMA_IGNORE_CHECK,
|
|
* LZMA_CONCATENATED, LZMA_FAIL_FAST
|
|
*
|
|
* \return - LZMA_OK: Initialization was successful.
|
|
* - LZMA_MEM_ERROR: Cannot allocate memory.
|
|
* - LZMA_OPTIONS_ERROR: Unsupported flags
|
|
* - LZMA_PROG_ERROR
|
|
*/
|
|
extern LZMA_API(lzma_ret) lzma_stream_decoder(
|
|
lzma_stream *strm, uint64_t memlimit, uint32_t flags)
|
|
lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
|
/**
|
|
* \brief Initialize multithreaded .xz Stream decoder
|
|
*
|
|
* \param strm Pointer to properly prepared lzma_stream
|
|
* \param options Pointer to multithreaded compression options
|
|
*
|
|
* The decoder can decode multiple Blocks in parallel. This requires that each
|
|
* Block Header contains the Compressed Size and Uncompressed size fields
|
|
* which are added by the multi-threaded encoder, see lzma_stream_encoder_mt().
|
|
*
|
|
* A Stream with one Block will only utilize one thread. A Stream with multiple
|
|
* Blocks but without size information in Block Headers will be processed in
|
|
* single-threaded mode in the same way as done by lzma_stream_decoder().
|
|
* Concatenated Streams are processed one Stream at a time; no inter-Stream
|
|
* parallelization is done.
|
|
*
|
|
* This function behaves like lzma_stream_decoder() when options->threads == 1
|
|
* and options->memlimit_threading <= 1.
|
|
*
|
|
* \return - LZMA_OK: Initialization was successful.
|
|
* - LZMA_MEM_ERROR: Cannot allocate memory.
|
|
* - LZMA_MEMLIMIT_ERROR: Memory usage limit was reached.
|
|
* - LZMA_OPTIONS_ERROR: Unsupported flags.
|
|
* - LZMA_PROG_ERROR
|
|
*/
|
|
extern LZMA_API( lzma_ret )
|
|
lzma_stream_decoder_mt( lzma_stream * strm, const lzma_mt * options ) lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
|
/**
|
|
* \brief Decode .xz, .lzma, and .lz (lzip) files with autodetection
|
|
*
|
|
* This decoder autodetects between the .xz, .lzma, and .lz file formats,
|
|
* and calls lzma_stream_decoder(), lzma_alone_decoder(), or
|
|
* lzma_lzip_decoder() once the type of the input file has been detected.
|
|
*
|
|
* Support for .lz was added in 5.4.0.
|
|
*
|
|
* If the flag LZMA_CONCATENATED is used and the input is a .lzma file:
|
|
* For historical reasons concatenated .lzma files aren't supported.
|
|
* If there is trailing data after one .lzma stream, lzma_code() will
|
|
* return LZMA_DATA_ERROR. (lzma_alone_decoder() doesn't have such a check
|
|
* as it doesn't support any decoder flags. It will return LZMA_STREAM_END
|
|
* after one .lzma stream.)
|
|
*
|
|
* \param strm Pointer to properly prepared lzma_stream
|
|
* \param memlimit Memory usage limit as bytes. Use UINT64_MAX
|
|
* to effectively disable the limiter. liblzma
|
|
* 5.2.3 and earlier don't allow 0 here and return
|
|
* LZMA_PROG_ERROR; later versions treat 0 as if 1
|
|
* had been specified.
|
|
* \param flags Bitwise-or of zero or more of the decoder flags:
|
|
* LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
|
|
* LZMA_TELL_ANY_CHECK, LZMA_IGNORE_CHECK,
|
|
* LZMA_CONCATENATED, LZMA_FAIL_FAST
|
|
*
|
|
* \return - LZMA_OK: Initialization was successful.
|
|
* - LZMA_MEM_ERROR: Cannot allocate memory.
|
|
* - LZMA_OPTIONS_ERROR: Unsupported flags
|
|
* - LZMA_PROG_ERROR
|
|
*/
|
|
extern LZMA_API(lzma_ret) lzma_auto_decoder(
|
|
lzma_stream *strm, uint64_t memlimit, uint32_t flags)
|
|
lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
|
/**
|
|
* \brief Initialize .lzma decoder (legacy file format)
|
|
*
|
|
* \param strm Pointer to properly prepared lzma_stream
|
|
* \param memlimit Memory usage limit as bytes. Use UINT64_MAX
|
|
* to effectively disable the limiter. liblzma
|
|
* 5.2.3 and earlier don't allow 0 here and return
|
|
* LZMA_PROG_ERROR; later versions treat 0 as if 1
|
|
* had been specified.
|
|
*
|
|
* Valid `action' arguments to lzma_code() are LZMA_RUN and LZMA_FINISH.
|
|
* There is no need to use LZMA_FINISH, but it's allowed because it may
|
|
* simplify certain types of applications.
|
|
*
|
|
* \return - LZMA_OK
|
|
* - LZMA_MEM_ERROR
|
|
* - LZMA_PROG_ERROR
|
|
*/
|
|
extern LZMA_API(lzma_ret) lzma_alone_decoder(
|
|
lzma_stream *strm, uint64_t memlimit)
|
|
lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
|
/**
|
|
* \brief Initialize .lz (lzip) decoder (a foreign file format)
|
|
*
|
|
* \param strm Pointer to properly prepared lzma_stream
|
|
* \param memlimit Memory usage limit as bytes. Use UINT64_MAX
|
|
* to effectively disable the limiter.
|
|
* \param flags Bitwise-or of flags, or zero for no flags.
|
|
* All decoder flags listed above are supported
|
|
* although only LZMA_CONCATENATED and (in very rare
|
|
* cases) LZMA_IGNORE_CHECK are actually useful.
|
|
* LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
|
|
* and LZMA_FAIL_FAST do nothing. LZMA_TELL_ANY_CHECK
|
|
* is supported for consistency only as CRC32 is
|
|
* always used in the .lz format.
|
|
*
|
|
* This decoder supports the .lz format version 0 and the unextended .lz
|
|
* format version 1:
|
|
*
|
|
* - Files in the format version 0 were produced by lzip 1.3 and older.
|
|
* Such files aren't common but may be found from file archives
|
|
* as a few source packages were released in this format. People
|
|
* might have old personal files in this format too. Decompression
|
|
* support for the format version 0 was removed in lzip 1.18.
|
|
*
|
|
* - lzip 1.3 added decompression support for .lz format version 1 files.
|
|
* Compression support was added in lzip 1.4. In lzip 1.6 the .lz format
|
|
* version 1 was extended to support the Sync Flush marker. This extension
|
|
* is not supported by liblzma. lzma_code() will return LZMA_DATA_ERROR
|
|
* at the location of the Sync Flush marker. In practice files with
|
|
* the Sync Flush marker are very rare and thus liblzma can decompress
|
|
* almost all .lz files.
|
|
*
|
|
* Just like with lzma_stream_decoder() for .xz files, LZMA_CONCATENATED
|
|
* should be used when decompressing normal standalone .lz files.
|
|
*
|
|
* The .lz format allows putting non-.lz data at the end of a file after at
|
|
* least one valid .lz member. That is, one can append custom data at the end
|
|
* of a .lz file and the decoder is required to ignore it. In liblzma this
|
|
* is relevant only when LZMA_CONCATENATED is used. In that case lzma_code()
|
|
* will return LZMA_STREAM_END and leave lzma_stream.next_in pointing to
|
|
* the first byte of the non-.lz data. An exception to this is if the first
|
|
* 1-3 bytes of the non-.lz data are identical to the .lz magic bytes
|
|
* (0x4C, 0x5A, 0x49, 0x50; "LZIP" in US-ASCII). In such a case the 1-3 bytes
|
|
* will have been ignored by lzma_code(). If one wishes to locate the non-.lz
|
|
* data reliably, one must ensure that the first byte isn't 0x4C. Actually
|
|
* one should ensure that none of the first four bytes of trailing data are
|
|
* equal to the magic bytes because lzip >= 1.20 requires it by default.
|
|
*
|
|
* \return - LZMA_OK: Initialization was successful.
|
|
* - LZMA_MEM_ERROR: Cannot allocate memory.
|
|
* - LZMA_OPTIONS_ERROR: Unsupported flags
|
|
* - LZMA_PROG_ERROR
|
|
*/
|
|
extern LZMA_API( lzma_ret )
|
|
lzma_lzip_decoder( lzma_stream * strm, uint64_t memlimit, uint32_t flags ) lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
|
/**
|
|
* \brief Single-call .xz Stream decoder
|
|
*
|
|
* \param memlimit Pointer to how much memory the decoder is allowed
|
|
* to allocate. The value pointed by this pointer is
|
|
* modified if and only if LZMA_MEMLIMIT_ERROR is
|
|
* returned.
|
|
* \param flags Bitwise-or of zero or more of the decoder flags:
|
|
* LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
|
|
* LZMA_IGNORE_CHECK, LZMA_CONCATENATED,
|
|
* LZMA_FAIL_FAST. Note that LZMA_TELL_ANY_CHECK
|
|
* is not allowed and will return LZMA_PROG_ERROR.
|
|
* \param allocator lzma_allocator for custom allocator functions.
|
|
* Set to NULL to use malloc() and free().
|
|
* \param in Beginning of the input buffer
|
|
* \param in_pos The next byte will be read from in[*in_pos].
|
|
* *in_pos is updated only if decoding succeeds.
|
|
* \param in_size Size of the input buffer; the first byte that
|
|
* won't be read is in[in_size].
|
|
* \param out Beginning of the output buffer
|
|
* \param out_pos The next byte will be written to out[*out_pos].
|
|
* *out_pos is updated only if decoding succeeds.
|
|
* \param out_size Size of the out buffer; the first byte into
|
|
* which no data is written to is out[out_size].
|
|
*
|
|
* \return - LZMA_OK: Decoding was successful.
|
|
* - LZMA_FORMAT_ERROR
|
|
* - LZMA_OPTIONS_ERROR
|
|
* - LZMA_DATA_ERROR
|
|
* - LZMA_NO_CHECK: This can be returned only if using
|
|
* the LZMA_TELL_NO_CHECK flag.
|
|
* - LZMA_UNSUPPORTED_CHECK: This can be returned only if using
|
|
* the LZMA_TELL_UNSUPPORTED_CHECK flag.
|
|
* - LZMA_MEM_ERROR
|
|
* - LZMA_MEMLIMIT_ERROR: Memory usage limit was reached.
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|
* The minimum required memlimit value was stored to *memlimit.
|
|
* - LZMA_BUF_ERROR: Output buffer was too small.
|
|
* - LZMA_PROG_ERROR
|
|
*/
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|
extern LZMA_API(lzma_ret) lzma_stream_buffer_decode(
|
|
uint64_t *memlimit, uint32_t flags,
|
|
const lzma_allocator *allocator,
|
|
const uint8_t *in, size_t *in_pos, size_t in_size,
|
|
uint8_t *out, size_t *out_pos, size_t out_size)
|
|
lzma_nothrow lzma_attr_warn_unused_result;
|
|
|
|
|
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/**
|
|
* \brief MicroLZMA decoder
|
|
*
|
|
* See lzma_microlzma_decoder() for more information.
|
|
*
|
|
* The lzma_code() usage with this decoder is completely normal. The
|
|
* special behavior of lzma_code() applies to lzma_microlzma_encoder() only.
|
|
*
|
|
* \param strm Pointer to properly prepared lzma_stream
|
|
* \param comp_size Compressed size of the MicroLZMA stream.
|
|
* The caller must somehow know this exactly.
|
|
* \param uncomp_size Uncompressed size of the MicroLZMA stream.
|
|
* If the exact uncompressed size isn't known, this
|
|
* can be set to a value that is at most as big as
|
|
* the exact uncompressed size would be, but then the
|
|
* next argument uncomp_size_is_exact must be false.
|
|
* \param uncomp_size_is_exact
|
|
* If true, uncomp_size must be exactly correct.
|
|
* This will improve error detection at the end of
|
|
* the stream. If the exact uncompressed size isn't
|
|
* known, this must be false. uncomp_size must still
|
|
* be at most as big as the exact uncompressed size
|
|
* is. Setting this to false when the exact size is
|
|
* known will work but error detection at the end of
|
|
* the stream will be weaker.
|
|
* \param dict_size LZMA dictionary size that was used when
|
|
* compressing the data. It is OK to use a bigger
|
|
* value too but liblzma will then allocate more
|
|
* memory than would actually be required and error
|
|
* detection will be slightly worse. (Note that with
|
|
* the implementation in XZ Embedded it doesn't
|
|
* affect the memory usage if one specifies bigger
|
|
* dictionary than actually required.)
|
|
*/
|
|
extern LZMA_API( lzma_ret ) lzma_microlzma_decoder(
|
|
lzma_stream * strm, uint64_t comp_size, uint64_t uncomp_size, lzma_bool uncomp_size_is_exact, uint32_t dict_size );
|