diff options
Diffstat (limited to 'src/xz/coder.c')
| -rw-r--r-- | src/xz/coder.c | 607 |
1 files changed, 486 insertions, 121 deletions
diff --git a/src/xz/coder.c b/src/xz/coder.c index 91d40ed..5e41f0d 100644 --- a/src/xz/coder.c +++ b/src/xz/coder.c @@ -1,16 +1,17 @@ +// SPDX-License-Identifier: 0BSD + /////////////////////////////////////////////////////////////////////////////// // /// \file coder.c /// \brief Compresses or uncompresses a file // -// Author: Lasse Collin -// -// This file has been put into the public domain. -// You can do whatever you want with this file. +// Authors: Lasse Collin +// Jia Tan // /////////////////////////////////////////////////////////////////////////////// #include "private.h" +#include "tuklib_integer.h" /// Return value type for coder_init(). @@ -26,25 +27,47 @@ enum format_type opt_format = FORMAT_AUTO; bool opt_auto_adjust = true; bool opt_single_stream = false; uint64_t opt_block_size = 0; -uint64_t *opt_block_list = NULL; - +block_list_entry *opt_block_list = NULL; +uint64_t block_list_largest; +uint32_t block_list_chain_mask; /// Stream used to communicate with liblzma static lzma_stream strm = LZMA_STREAM_INIT; -/// Filters needed for all encoding all formats, and also decoding in raw data -static lzma_filter filters[LZMA_FILTERS_MAX + 1]; +/// Maximum number of filter chains. The first filter chain is the default, +/// and 9 other filter chains can be specified with --filtersX. +#define NUM_FILTER_CHAIN_MAX 10 + +/// The default filter chain is in chains[0]. It is used for encoding +/// in all supported formats and also for decdoing raw streams. The other +/// filter chains are set by --filtersX to support changing filters with +/// the --block-list option. +static lzma_filter chains[NUM_FILTER_CHAIN_MAX][LZMA_FILTERS_MAX + 1]; + +/// Bitmask indicating which filter chains are actually used when encoding +/// in the .xz format. This is needed since the filter chains specified using +/// --filtersX (or the default filter chain) might in reality be unneeded +/// if they are never used in --block-list. When --block-list isn't +/// specified, only the default filter chain is used, thus the initial +/// value of this variable is 1U << 0 (the number of the default chain is 0). +static uint32_t chains_used_mask = 1U << 0; /// Input and output buffers static io_buf in_buf; static io_buf out_buf; -/// Number of filters. Zero indicates that we are using a preset. +/// Number of filters in the default filter chain. Zero indicates that +/// we are using a preset. static uint32_t filters_count = 0; /// Number of the preset (0-9) static uint32_t preset_number = LZMA_PRESET_DEFAULT; +/// True if the current default filter chain was set using the --filters +/// option. The filter chain is reset if a preset option (like -9) or an +/// old-style filter option (like --lzma2) is used after a --filters option. +static bool string_to_filter_used = false; + /// Integrity check type static lzma_check check; @@ -60,7 +83,6 @@ static bool allow_trailing_input; static lzma_mt mt_options = { .flags = 0, .timeout = 300, - .filters = filters, }; #endif @@ -77,14 +99,14 @@ coder_set_check(lzma_check new_check) static void forget_filter_chain(void) { - // Setting a preset makes us forget a possibly defined custom - // filter chain. - while (filters_count > 0) { - --filters_count; - free(filters[filters_count].options); - filters[filters_count].options = NULL; + // Setting a preset or using --filters makes us forget + // the earlier custom filter chain (if any). + if (filters_count > 0) { + lzma_filters_free(chains[0], NULL); + filters_count = 0; } + string_to_filter_used = false; return; } @@ -114,9 +136,15 @@ coder_add_filter(lzma_vli id, void *options) if (filters_count == LZMA_FILTERS_MAX) message_fatal(_("Maximum number of filters is four")); - filters[filters_count].id = id; - filters[filters_count].options = options; - ++filters_count; + if (string_to_filter_used) + forget_filter_chain(); + + chains[0][filters_count].id = id; + chains[0][filters_count].options = options; + + // Terminate the filter chain with LZMA_VLI_UNKNOWN to simplify + // implementation of forget_filter_chain(). + chains[0][++filters_count].id = LZMA_VLI_UNKNOWN; // Setting a custom filter chain makes us forget the preset options. // This makes a difference if one specifies e.g. "xz -9 --lzma2 -e" @@ -128,6 +156,69 @@ coder_add_filter(lzma_vli id, void *options) } +static void +str_to_filters(const char *str, uint32_t index, uint32_t flags) +{ + int error_pos; + const char *err = lzma_str_to_filters(str, &error_pos, + chains[index], flags, NULL); + + if (err != NULL) { + char filter_num[2] = ""; + if (index > 0) + filter_num[0] = '0' + index; + + // FIXME? The message in err isn't translated. + // Including the translations in the xz translations is + // slightly ugly but possible. Creating a new domain for + // liblzma might not be worth it especially since on some + // OSes it adds extra dependencies to translation libraries. + message(V_ERROR, _("Error in --filters%s=FILTERS option:"), + filter_num); + message(V_ERROR, "%s", str); + message(V_ERROR, "%*s^", error_pos, ""); + message_fatal("%s", err); + } +} + + +extern void +coder_add_filters_from_str(const char *filter_str) +{ + // Forget presets and previously defined filter chain. See + // coder_add_filter() above for why preset_number must be reset too. + forget_filter_chain(); + preset_number = LZMA_PRESET_DEFAULT; + + string_to_filter_used = true; + + // Include LZMA_STR_ALL_FILTERS so this can be used with --format=raw. + str_to_filters(filter_str, 0, LZMA_STR_ALL_FILTERS); + + // Set the filters_count to be the number of filters converted from + // the string. + for (filters_count = 0; chains[0][filters_count].id + != LZMA_VLI_UNKNOWN; + ++filters_count) ; + + assert(filters_count > 0); + return; +} + + +extern void +coder_add_block_filters(const char *str, size_t slot) +{ + // Free old filters first, if they were previously allocated. + if (chains_used_mask & (1U << slot)) + lzma_filters_free(chains[slot], NULL); + + str_to_filters(str, slot, 0); + + chains_used_mask |= 1U << slot; +} + + tuklib_attr_noreturn static void memlimit_too_small(uint64_t memory_usage) @@ -139,6 +230,67 @@ memlimit_too_small(uint64_t memory_usage) } +#ifdef HAVE_ENCODERS +/// \brief Calculate the memory usage of each filter chain. +/// +/// \param chains_memusages If non-NULL, the memusage of the encoder +/// or decoder for each chain is stored in +/// this array. +/// \param mt If non-NULL, calculate memory usage of +/// multithreaded encoder. +/// \param encode Whether to calculate encoder or decoder +/// memory usage. This must be true if +/// mt != NULL. +/// +/// \return Return the highest memory usage of all of the filter chains. +static uint64_t +get_chains_memusage(uint64_t *chains_memusages, const lzma_mt *mt, bool encode) +{ + uint64_t max_memusage = 0; + +#ifdef MYTHREAD_ENABLED + // Copy multithreading options to a temporary struct since the + // "filters" member needs to be changed. + lzma_mt mt_local; + if (mt != NULL) + mt_local = *mt; +#else + (void)mt; +#endif + + for (uint32_t i = 0; i < ARRAY_SIZE(chains); i++) { + if (!(chains_used_mask & (1U << i))) + continue; + + uint64_t memusage = UINT64_MAX; +#ifdef MYTHREAD_ENABLED + if (mt != NULL) { + assert(encode); + mt_local.filters = chains[i]; + memusage = lzma_stream_encoder_mt_memusage(&mt_local); + } else +#endif + if (encode) { + memusage = lzma_raw_encoder_memusage(chains[i]); + } +#ifdef HAVE_DECODERS + else { + memusage = lzma_raw_decoder_memusage(chains[i]); + } +#endif + + if (chains_memusages != NULL) + chains_memusages[i] = memusage; + + if (memusage > max_memusage) + max_memusage = memusage; + } + + return max_memusage; +} +#endif + + extern void coder_set_compression_settings(void) { @@ -156,10 +308,56 @@ coder_set_compression_settings(void) check = LZMA_CHECK_CRC32; } +#ifdef HAVE_ENCODERS + if (opt_block_list != NULL) { + // args.c ensures these. + assert(opt_mode == MODE_COMPRESS); + assert(opt_format == FORMAT_XZ); + + // Find out if block_list_chain_mask has a bit set that + // isn't set in chains_used_mask. + const uint32_t missing_chains_mask + = (block_list_chain_mask ^ chains_used_mask) + & block_list_chain_mask; + + // If a filter chain was specified in --block-list but no + // matching --filtersX option was used, exit with an error. + if (missing_chains_mask != 0) { + // Get the number of the first missing filter chain + // and show it in the error message. + const unsigned first_missing + = (unsigned)ctz32(missing_chains_mask); + + message_fatal(_("filter chain %u used by " + "--block-list but not specified " + "with --filters%u="), + first_missing, first_missing); + } + + // Omit the unused filter chains from mask of used chains. + // + // (FIXME? When built with debugging, coder_free() will free() + // the filter chains (except the default chain) which makes + // Valgrind show fewer reachable allocations. But coder_free() + // uses this mask to determine which chains to free. Thus it + // won't free the ones that are cleared here from the mask. + // In practice this doesn't matter.) + chains_used_mask &= block_list_chain_mask; + } else { + // Reset filters used mask in case --block-list is not + // used, but --filtersX is used. + chains_used_mask = 1U << 0; + } +#endif + // Options for LZMA1 or LZMA2 in case we are using a preset. static lzma_options_lzma opt_lzma; - if (filters_count == 0) { + // The first filter in the chains[] array is for the default + // filter chain. + lzma_filter *default_filters = chains[0]; + + if (filters_count == 0 && chains_used_mask & 1) { // We are using a preset. This is not a good idea in raw mode // except when playing around with things. Different versions // of this software may use different options in presets, and @@ -179,46 +377,61 @@ coder_set_compression_settings(void) message_bug(); // Use LZMA2 except with --format=lzma we use LZMA1. - filters[0].id = opt_format == FORMAT_LZMA + default_filters[0].id = opt_format == FORMAT_LZMA ? LZMA_FILTER_LZMA1 : LZMA_FILTER_LZMA2; - filters[0].options = &opt_lzma; + default_filters[0].options = &opt_lzma; + filters_count = 1; - } - // Terminate the filter options array. - filters[filters_count].id = LZMA_VLI_UNKNOWN; + // Terminate the filter options array. + default_filters[1].id = LZMA_VLI_UNKNOWN; + } // If we are using the .lzma format, allow exactly one filter - // which has to be LZMA1. + // which has to be LZMA1. There is no need to check if the default + // filter chain is being used since it can only be disabled if + // --block-list is used, which is incompatible with FORMAT_LZMA. if (opt_format == FORMAT_LZMA && (filters_count != 1 - || filters[0].id != LZMA_FILTER_LZMA1)) + || default_filters[0].id != LZMA_FILTER_LZMA1)) message_fatal(_("The .lzma format supports only " "the LZMA1 filter")); // If we are using the .xz format, make sure that there is no LZMA1 - // filter to prevent LZMA_PROG_ERROR. - if (opt_format == FORMAT_XZ) + // filter to prevent LZMA_PROG_ERROR. With the chains from --filtersX + // we have already ensured this by calling lzma_str_to_filters() + // without setting the flags that would allow non-.xz filters. + if (opt_format == FORMAT_XZ && chains_used_mask & 1) for (size_t i = 0; i < filters_count; ++i) - if (filters[i].id == LZMA_FILTER_LZMA1) + if (default_filters[i].id == LZMA_FILTER_LZMA1) message_fatal(_("LZMA1 cannot be used " "with the .xz format")); - // Print the selected filter chain. - message_filters_show(V_DEBUG, filters); + if (chains_used_mask & 1) { + // Print the selected default filter chain. + message_filters_show(V_DEBUG, default_filters); + } // The --flush-timeout option requires LZMA_SYNC_FLUSH support - // from the filter chain. Currently threaded encoder doesn't support - // LZMA_SYNC_FLUSH so single-threaded mode must be used. + // from the filter chain. Currently the threaded encoder doesn't + // support LZMA_SYNC_FLUSH so single-threaded mode must be used. if (opt_mode == MODE_COMPRESS && opt_flush_timeout != 0) { - for (size_t i = 0; i < filters_count; ++i) { - switch (filters[i].id) { - case LZMA_FILTER_LZMA2: - case LZMA_FILTER_DELTA: - break; + for (unsigned i = 0; i < ARRAY_SIZE(chains); ++i) { + if (!(chains_used_mask & (1U << i))) + continue; + + const lzma_filter *fc = chains[i]; + for (size_t j = 0; fc[j].id != LZMA_VLI_UNKNOWN; j++) { + switch (fc[j].id) { + case LZMA_FILTER_LZMA2: + case LZMA_FILTER_DELTA: + break; - default: - message_fatal(_("The filter chain is " - "incompatible with --flush-timeout")); + default: + message_fatal(_("Filter chain %u is " + "incompatible with " + "--flush-timeout"), + i); + } } } @@ -229,23 +442,72 @@ coder_set_compression_settings(void) } } - // Get the memory usage. Note that if --format=raw was used, - // we can be decompressing. + // Get memory limit and the memory usage of the used filter chains. + // Note that if --format=raw was used, we can be decompressing + // using the default filter chain. // - // If multithreaded .xz compression is done, this value will be - // replaced. + // If multithreaded .xz compression is done, the memory limit + // will be replaced. uint64_t memory_limit = hardware_memlimit_get(opt_mode); uint64_t memory_usage = UINT64_MAX; + +#ifdef HAVE_ENCODERS + // Memory usage for each encoder filter chain (default + // or --filtersX). The encoder options may need to be + // scaled down depending on the memory usage limit. + uint64_t encoder_memusages[ARRAY_SIZE(chains)]; +#endif + if (opt_mode == MODE_COMPRESS) { #ifdef HAVE_ENCODERS # ifdef MYTHREAD_ENABLED if (opt_format == FORMAT_XZ && hardware_threads_is_mt()) { memory_limit = hardware_memlimit_mtenc_get(); mt_options.threads = hardware_threads_get(); - mt_options.block_size = opt_block_size; + + uint64_t block_size = opt_block_size; + + // If opt_block_size is not set, find the maximum + // recommended Block size based on the filter chains + if (block_size == 0) { + for (unsigned i = 0; i < ARRAY_SIZE(chains); + i++) { + if (!(chains_used_mask & (1U << i))) + continue; + + uint64_t size = lzma_mt_block_size( + chains[i]); + + // If this returns an error, then one + // of the filter chains in use is + // invalid, so there is no point in + // progressing further. + if (size == UINT64_MAX) + message_fatal(_("Unsupported " + "options in filter " + "chain %u"), i); + + if (size > block_size) + block_size = size; + } + + // If --block-list was used and our current + // Block size exceeds the largest size + // in --block-list, reduce the Block size of + // the multithreaded encoder. The extra size + // would only be a waste of RAM. With a + // smaller Block size we might even be able + // to use more threads in some cases. + if (block_list_largest > 0 && block_size + > block_list_largest) + block_size = block_list_largest; + } + + mt_options.block_size = block_size; mt_options.check = check; - memory_usage = lzma_stream_encoder_mt_memusage( - &mt_options); + + memory_usage = get_chains_memusage(encoder_memusages, + &mt_options, true); if (memory_usage != UINT64_MAX) message(V_DEBUG, _("Using up to %" PRIu32 " threads."), @@ -253,12 +515,13 @@ coder_set_compression_settings(void) } else # endif { - memory_usage = lzma_raw_encoder_memusage(filters); + memory_usage = get_chains_memusage(encoder_memusages, + NULL, true); } #endif } else { #ifdef HAVE_DECODERS - memory_usage = lzma_raw_decoder_memusage(filters); + memory_usage = lzma_raw_decoder_memusage(default_filters); #endif } @@ -268,12 +531,13 @@ coder_set_compression_settings(void) // Print memory usage info before possible dictionary // size auto-adjusting. // - // NOTE: If only encoder support was built, we cannot show the + // NOTE: If only encoder support was built, we cannot show // what the decoder memory usage will be. message_mem_needed(V_DEBUG, memory_usage); -#ifdef HAVE_DECODERS - if (opt_mode == MODE_COMPRESS) { - const uint64_t decmem = lzma_raw_decoder_memusage(filters); + +#if defined(HAVE_ENCODERS) && defined(HAVE_DECODERS) + if (opt_mode == MODE_COMPRESS && message_verbosity_get() >= V_DEBUG) { + const uint64_t decmem = get_chains_memusage(NULL, NULL, false); if (decmem != UINT64_MAX) message(V_DEBUG, _("Decompression will need " "%s MiB of memory."), uint64_to_str( @@ -300,14 +564,21 @@ coder_set_compression_settings(void) // Reduce the number of threads by one and check // the memory usage. --mt_options.threads; - memory_usage = lzma_stream_encoder_mt_memusage( - &mt_options); + memory_usage = get_chains_memusage(encoder_memusages, + &mt_options, true); if (memory_usage == UINT64_MAX) message_bug(); if (memory_usage <= memory_limit) { // The memory usage is now low enough. - message(V_WARNING, _("Reduced the number of " + // + // Since 5.6.1: This is only shown at + // V_DEBUG instead of V_WARNING because + // changing the number of threads doesn't + // affect the output. On some systems this + // message would be too common now that + // multithreaded compression is the default. + message(V_DEBUG, _("Reduced the number of " "threads from %s to %s to not exceed " "the memory usage limit of %s MiB"), uint64_to_str( @@ -326,8 +597,11 @@ coder_set_compression_settings(void) // way -T0 won't use insane amount of memory but at the same // time the soft limit will never make xz fail and never make // xz change settings that would affect the compressed output. + // + // Since 5.6.1: Like above, this is now shown at V_DEBUG + // instead of V_WARNING. if (hardware_memlimit_mtenc_is_default()) { - message(V_WARNING, _("Reduced the number of threads " + message(V_DEBUG, _("Reduced the number of threads " "from %s to one. The automatic memory usage " "limit of %s MiB is still being exceeded. " "%s MiB of memory is required. " @@ -353,7 +627,8 @@ coder_set_compression_settings(void) // the multithreaded mode but the output // is also different. hardware_threads_set(1); - memory_usage = lzma_raw_encoder_memusage(filters); + memory_usage = get_chains_memusage(encoder_memusages, + NULL, true); message(V_WARNING, _("Switching to single-threaded mode " "to not exceed the memory usage limit of %s MiB"), uint64_to_str(round_up_to_mib(memory_limit), 0)); @@ -368,55 +643,85 @@ coder_set_compression_settings(void) if (!opt_auto_adjust) memlimit_too_small(memory_usage); - // Look for the last filter if it is LZMA2 or LZMA1, so we can make - // it use less RAM. With other filters we don't know what to do. - size_t i = 0; - while (filters[i].id != LZMA_FILTER_LZMA2 - && filters[i].id != LZMA_FILTER_LZMA1) { - if (filters[i].id == LZMA_VLI_UNKNOWN) - memlimit_too_small(memory_usage); + // Adjust each filter chain that is exceeding the memory usage limit. + for (unsigned i = 0; i < ARRAY_SIZE(chains); i++) { + // Skip unused chains. + if (!(chains_used_mask & (1U << i))) + continue; + + // Skip chains that already meet the memory usage limit. + if (encoder_memusages[i] <= memory_limit) + continue; + + // Look for the last filter if it is LZMA2 or LZMA1, so we + // can make it use less RAM. We cannot adjust other filters. + unsigned j = 0; + while (chains[i][j].id != LZMA_FILTER_LZMA2 + && chains[i][j].id != LZMA_FILTER_LZMA1) { + // NOTE: This displays the too high limit of this + // particular filter chain. If multiple chains are + // specified and another one would need more then + // this message could be confusing. As long as LZMA2 + // is the only memory hungry filter in .xz this + // doesn't matter at all in practice. + // + // FIXME? However, it's sort of odd still if we had + // switched from multithreaded mode to single-threaded + // mode because single-threaded produces different + // output. So the messages could perhaps be clearer. + // Another case of this is a few lines below. + if (chains[i][j].id == LZMA_VLI_UNKNOWN) + memlimit_too_small(encoder_memusages[i]); + + ++j; + } - ++i; - } + // Decrease the dictionary size until we meet the memory + // usage limit. First round down to full mebibytes. + lzma_options_lzma *opt = chains[i][j].options; + const uint32_t orig_dict_size = opt->dict_size; + opt->dict_size &= ~((UINT32_C(1) << 20) - 1); - // Decrease the dictionary size until we meet the memory - // usage limit. First round down to full mebibytes. - lzma_options_lzma *opt = filters[i].options; - const uint32_t orig_dict_size = opt->dict_size; - opt->dict_size &= ~((UINT32_C(1) << 20) - 1); - while (true) { - // If it is below 1 MiB, auto-adjusting failed. We could be - // more sophisticated and scale it down even more, but let's - // see if many complain about this version. - // - // FIXME: Displays the scaled memory usage instead - // of the original. - if (opt->dict_size < (UINT32_C(1) << 20)) - memlimit_too_small(memory_usage); + while (true) { + // If it is below 1 MiB, auto-adjusting failed. + // + // FIXME? See the FIXME a few lines above. + if (opt->dict_size < (UINT32_C(1) << 20)) + memlimit_too_small(encoder_memusages[i]); - memory_usage = lzma_raw_encoder_memusage(filters); - if (memory_usage == UINT64_MAX) - message_bug(); + encoder_memusages[i] + = lzma_raw_encoder_memusage(chains[i]); + if (encoder_memusages[i] == UINT64_MAX) + message_bug(); - // Accept it if it is low enough. - if (memory_usage <= memory_limit) - break; + // Accept it if it is low enough. + if (encoder_memusages[i] <= memory_limit) + break; - // Otherwise 1 MiB down and try again. I hope this - // isn't too slow method for cases where the original - // dict_size is very big. - opt->dict_size -= UINT32_C(1) << 20; - } + // Otherwise adjust it 1 MiB down and try again. + opt->dict_size -= UINT32_C(1) << 20; + } - // Tell the user that we decreased the dictionary size. - message(V_WARNING, _("Adjusted LZMA%c dictionary size " - "from %s MiB to %s MiB to not exceed " - "the memory usage limit of %s MiB"), - filters[i].id == LZMA_FILTER_LZMA2 - ? '2' : '1', - uint64_to_str(orig_dict_size >> 20, 0), - uint64_to_str(opt->dict_size >> 20, 1), - uint64_to_str(round_up_to_mib(memory_limit), 2)); + // Tell the user that we decreased the dictionary size. + // The message is slightly different between the default + // filter chain (0) or and chains from --filtersX. + const char lzma_num = chains[i][j].id == LZMA_FILTER_LZMA2 + ? '2' : '1'; + const char *from_size = uint64_to_str(orig_dict_size >> 20, 0); + const char *to_size = uint64_to_str(opt->dict_size >> 20, 1); + const char *limit_size = uint64_to_str(round_up_to_mib( + memory_limit), 2); + if (i == 0) + message(V_WARNING, _("Adjusted LZMA%c dictionary " + "size from %s MiB to %s MiB to not exceed the " + "memory usage limit of %s MiB"), + lzma_num, from_size, to_size, limit_size); + else + message(V_WARNING, _("Adjusted LZMA%c dictionary size " + "for --filters%u from %s MiB to %s MiB to not " + "exceed the memory usage limit of %s MiB"), + lzma_num, i, from_size, to_size, limit_size); + } #endif return; @@ -512,6 +817,13 @@ coder_init(file_pair *pair) // These will be handled later in this function. allow_trailing_input = false; + // Set the first filter chain. If the --block-list option is not + // used then use the default filter chain (chains[0]). + // Otherwise, use first filter chain from the block list. + lzma_filter *active_filters = opt_block_list == NULL + ? chains[0] + : chains[opt_block_list[0].chain_num]; + if (opt_mode == MODE_COMPRESS) { #ifdef HAVE_ENCODERS switch (opt_format) { @@ -522,17 +834,19 @@ coder_init(file_pair *pair) case FORMAT_XZ: # ifdef MYTHREAD_ENABLED + mt_options.filters = active_filters; if (hardware_threads_is_mt()) ret = lzma_stream_encoder_mt( &strm, &mt_options); else # endif ret = lzma_stream_encoder( - &strm, filters, check); + &strm, active_filters, check); break; case FORMAT_LZMA: - ret = lzma_alone_encoder(&strm, filters[0].options); + ret = lzma_alone_encoder(&strm, + active_filters[0].options); break; # ifdef HAVE_LZIP_DECODER @@ -544,7 +858,7 @@ coder_init(file_pair *pair) # endif case FORMAT_RAW: - ret = lzma_raw_encoder(&strm, filters); + ret = lzma_raw_encoder(&strm, active_filters); break; } #endif @@ -668,7 +982,7 @@ coder_init(file_pair *pair) case FORMAT_RAW: // Memory usage has already been checked in // coder_set_compression_settings(). - ret = lzma_raw_decoder(&strm, filters); + ret = lzma_raw_decoder(&strm, active_filters); break; } @@ -716,6 +1030,7 @@ coder_init(file_pair *pair) } +#ifdef HAVE_ENCODERS /// Resolve conflicts between opt_block_size and opt_block_list in single /// threaded mode. We want to default to opt_block_list, except when it is /// larger than opt_block_size. If this is the case for the current Block @@ -746,12 +1061,39 @@ split_block(uint64_t *block_remaining, } else { // The Block at *list_pos has been finished. Go to the next - // entry in the list. If the end of the list has been reached, - // reuse the size of the last Block. - if (opt_block_list[*list_pos + 1] != 0) + // entry in the list. If the end of the list has been + // reached, reuse the size and filters of the last Block. + if (opt_block_list[*list_pos + 1].size != 0) { ++*list_pos; - *block_remaining = opt_block_list[*list_pos]; + // Update the filters if needed. + if (opt_block_list[*list_pos - 1].chain_num + != opt_block_list[*list_pos].chain_num) { + const unsigned chain_num + = opt_block_list[*list_pos].chain_num; + const lzma_filter *next = chains[chain_num]; + const lzma_ret ret = lzma_filters_update( + &strm, next); + + if (ret != LZMA_OK) { + // This message is only possible if + // the filter chain has unsupported + // options since the filter chain is + // validated using + // lzma_raw_encoder_memusage() or + // lzma_stream_encoder_mt_memusage(). + // Some options are not validated until + // the encoders are initialized. + message_fatal( + _("Error changing to " + "filter chain %u: %s"), + chain_num, + message_strm(ret)); + } + } + } + + *block_remaining = opt_block_list[*list_pos].size; // If in single-threaded mode, split up the Block if needed. // This is not needed in multi-threaded mode because liblzma @@ -764,6 +1106,7 @@ split_block(uint64_t *block_remaining, } } } +#endif static bool @@ -796,6 +1139,7 @@ coder_normal(file_pair *pair) // Assume that something goes wrong. bool success = false; +#ifdef HAVE_ENCODERS // block_remaining indicates how many input bytes to encode before // finishing the current .xz Block. The Block size is set with // --block-size=SIZE and --block-list. They have an effect only when @@ -829,15 +1173,18 @@ coder_normal(file_pair *pair) // output is still not identical because in single-threaded // mode the size info isn't written into Block Headers. if (opt_block_list != NULL) { - if (block_remaining < opt_block_list[list_pos]) { + if (block_remaining < opt_block_list[list_pos].size) { assert(!hardware_threads_is_mt()); - next_block_remaining = opt_block_list[list_pos] + next_block_remaining = + opt_block_list[list_pos].size - block_remaining; } else { - block_remaining = opt_block_list[list_pos]; + block_remaining = + opt_block_list[list_pos].size; } } } +#endif strm.next_out = out_buf.u8; strm.avail_out = IO_BUFFER_SIZE; @@ -847,17 +1194,22 @@ coder_normal(file_pair *pair) // flushing or finishing. if (strm.avail_in == 0 && action == LZMA_RUN) { strm.next_in = in_buf.u8; - strm.avail_in = io_read(pair, &in_buf, - my_min(block_remaining, - IO_BUFFER_SIZE)); +#ifdef HAVE_ENCODERS + const size_t read_size = my_min(block_remaining, + IO_BUFFER_SIZE); +#else + const size_t read_size = IO_BUFFER_SIZE; +#endif + strm.avail_in = io_read(pair, &in_buf, read_size); if (strm.avail_in == SIZE_MAX) break; if (pair->src_eof) { action = LZMA_FINISH; - - } else if (block_remaining != UINT64_MAX) { + } +#ifdef HAVE_ENCODERS + else if (block_remaining != UINT64_MAX) { // Start a new Block after every // opt_block_size bytes of input. block_remaining -= strm.avail_in; @@ -867,6 +1219,7 @@ coder_normal(file_pair *pair) if (action == LZMA_RUN && pair->flush_needed) action = LZMA_SYNC_FLUSH; +#endif } // Let liblzma do the actual work. @@ -878,6 +1231,7 @@ coder_normal(file_pair *pair) break; } +#ifdef HAVE_ENCODERS if (ret == LZMA_STREAM_END && (action == LZMA_SYNC_FLUSH || action == LZMA_FULL_BARRIER)) { if (action == LZMA_SYNC_FLUSH) { @@ -907,8 +1261,9 @@ coder_normal(file_pair *pair) // Start a new Block after LZMA_FULL_FLUSH or continue // the same block after LZMA_SYNC_FLUSH. action = LZMA_RUN; - - } else if (ret != LZMA_OK) { + } else +#endif + if (ret != LZMA_OK) { // Determine if the return value indicates that we // won't continue coding. LZMA_NO_CHECK would be // here too if LZMA_TELL_ANY_CHECK was used. @@ -1103,6 +1458,16 @@ coder_run(const char *filename) extern void coder_free(void) { + // Free starting from the second filter chain since the default + // filter chain may have its options set from a static variable + // in coder_set_compression_settings(). Since this is only run in + // debug mode and will be freed when the process ends anyway, we + // don't worry about freeing it. + for (uint32_t i = 1; i < ARRAY_SIZE(chains); i++) { + if (chains_used_mask & (1U << i)) + lzma_filters_free(chains[i], NULL); + } + lzma_end(&strm); return; } |