| /////////////////////////////////////////////////////////////////////////////// |
| // |
| /// \file filter_decoder.c |
| /// \brief Filter ID mapping to filter-specific functions |
| // |
| // Author: Lasse Collin |
| // |
| // This file has been put into the public domain. |
| // You can do whatever you want with this file. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "filter_decoder.h" |
| #include "filter_common.h" |
| #include "lzma_decoder.h" |
| #include "lzma2_decoder.h" |
| #include "simple_decoder.h" |
| #include "delta_decoder.h" |
| |
| |
| typedef struct { |
| /// Filter ID |
| lzma_vli id; |
| |
| /// Initializes the filter encoder and calls lzma_next_filter_init() |
| /// for filters + 1. |
| lzma_init_function init; |
| |
| /// Calculates memory usage of the encoder. If the options are |
| /// invalid, UINT64_MAX is returned. |
| uint64_t (*memusage)(const void *options); |
| |
| /// Decodes Filter Properties. |
| /// |
| /// \return - LZMA_OK: Properties decoded successfully. |
| /// - LZMA_OPTIONS_ERROR: Unsupported properties |
| /// - LZMA_MEM_ERROR: Memory allocation failed. |
| lzma_ret (*props_decode)(void **options, lzma_allocator *allocator, |
| const uint8_t *props, size_t props_size); |
| |
| } lzma_filter_decoder; |
| |
| |
| static const lzma_filter_decoder decoders[] = { |
| #ifdef HAVE_DECODER_LZMA1 |
| { |
| .id = LZMA_FILTER_LZMA1, |
| .init = &lzma_lzma_decoder_init, |
| .memusage = &lzma_lzma_decoder_memusage, |
| .props_decode = &lzma_lzma_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_LZMA2 |
| { |
| .id = LZMA_FILTER_LZMA2, |
| .init = &lzma_lzma2_decoder_init, |
| .memusage = &lzma_lzma2_decoder_memusage, |
| .props_decode = &lzma_lzma2_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_X86 |
| { |
| .id = LZMA_FILTER_X86, |
| .init = &lzma_simple_x86_decoder_init, |
| .memusage = NULL, |
| .props_decode = &lzma_simple_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_POWERPC |
| { |
| .id = LZMA_FILTER_POWERPC, |
| .init = &lzma_simple_powerpc_decoder_init, |
| .memusage = NULL, |
| .props_decode = &lzma_simple_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_IA64 |
| { |
| .id = LZMA_FILTER_IA64, |
| .init = &lzma_simple_ia64_decoder_init, |
| .memusage = NULL, |
| .props_decode = &lzma_simple_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_ARM |
| { |
| .id = LZMA_FILTER_ARM, |
| .init = &lzma_simple_arm_decoder_init, |
| .memusage = NULL, |
| .props_decode = &lzma_simple_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_ARMTHUMB |
| { |
| .id = LZMA_FILTER_ARMTHUMB, |
| .init = &lzma_simple_armthumb_decoder_init, |
| .memusage = NULL, |
| .props_decode = &lzma_simple_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_SPARC |
| { |
| .id = LZMA_FILTER_SPARC, |
| .init = &lzma_simple_sparc_decoder_init, |
| .memusage = NULL, |
| .props_decode = &lzma_simple_props_decode, |
| }, |
| #endif |
| #ifdef HAVE_DECODER_DELTA |
| { |
| .id = LZMA_FILTER_DELTA, |
| .init = &lzma_delta_decoder_init, |
| .memusage = &lzma_delta_coder_memusage, |
| .props_decode = &lzma_delta_props_decode, |
| }, |
| #endif |
| }; |
| |
| |
| static const lzma_filter_decoder * |
| decoder_find(lzma_vli id) |
| { |
| for (size_t i = 0; i < ARRAY_SIZE(decoders); ++i) |
| if (decoders[i].id == id) |
| return decoders + i; |
| |
| return NULL; |
| } |
| |
| |
| extern LZMA_API(lzma_bool) |
| lzma_filter_decoder_is_supported(lzma_vli id) |
| { |
| return decoder_find(id) != NULL; |
| } |
| |
| |
| extern lzma_ret |
| lzma_raw_decoder_init(lzma_next_coder *next, lzma_allocator *allocator, |
| const lzma_filter *options) |
| { |
| return lzma_raw_coder_init(next, allocator, |
| options, (lzma_filter_find)(&decoder_find), false); |
| } |
| |
| |
| extern LZMA_API(lzma_ret) |
| lzma_raw_decoder(lzma_stream *strm, const lzma_filter *options) |
| { |
| lzma_next_strm_init(lzma_raw_decoder_init, strm, options); |
| |
| strm->internal->supported_actions[LZMA_RUN] = true; |
| strm->internal->supported_actions[LZMA_FINISH] = true; |
| |
| return LZMA_OK; |
| } |
| |
| |
| extern LZMA_API(uint64_t) |
| lzma_raw_decoder_memusage(const lzma_filter *filters) |
| { |
| return lzma_raw_coder_memusage( |
| (lzma_filter_find)(&decoder_find), filters); |
| } |
| |
| |
| extern LZMA_API(lzma_ret) |
| lzma_properties_decode(lzma_filter *filter, lzma_allocator *allocator, |
| const uint8_t *props, size_t props_size) |
| { |
| // Make it always NULL so that the caller can always safely free() it. |
| filter->options = NULL; |
| |
| const lzma_filter_decoder *const fd = decoder_find(filter->id); |
| if (fd == NULL) |
| return LZMA_OPTIONS_ERROR; |
| |
| if (fd->props_decode == NULL) |
| return props_size == 0 ? LZMA_OK : LZMA_OPTIONS_ERROR; |
| |
| return fd->props_decode( |
| &filter->options, allocator, props, props_size); |
| } |