diff options
author | Daniel Baumann <mail@daniel-baumann.ch> | 2015-11-06 11:26:36 +0000 |
---|---|---|
committer | Daniel Baumann <mail@daniel-baumann.ch> | 2015-11-06 11:26:36 +0000 |
commit | b014cae321a7266c20661e52b4035f107e2ed7b0 (patch) | |
tree | f6297838c470bb5ac8b1093687c87d2117de82a1 /decoder.c | |
parent | Adding debian version 1.0~rc2-1. (diff) | |
download | clzip-b014cae321a7266c20661e52b4035f107e2ed7b0.tar.xz clzip-b014cae321a7266c20661e52b4035f107e2ed7b0.zip |
Merging upstream version 1.0~rc3.
Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>
Diffstat (limited to '')
-rw-r--r-- | decoder.c | 84 |
1 files changed, 45 insertions, 39 deletions
@@ -28,15 +28,18 @@ #include "decoder.h" -bool Ib_read_block( struct Input_buffer * const ibuf ) +bool Rd_read_block( struct Range_decoder * const rdec ) { - if( ibuf->at_stream_end ) return false; - ibuf->stream_pos = readblock( ibuf->infd_, ibuf->buffer, Ib_buffer_size ); - if( ibuf->stream_pos != Ib_buffer_size && errno ) - { show_error( "read error", errno, false ); cleanup_and_fail( 1 ); } - ibuf->pos = 0; - ibuf->at_stream_end = ( ibuf->stream_pos < Ib_buffer_size ); - return !Ib_finished( ibuf ); + if( !rdec->at_stream_end ) + { + rdec->stream_pos = readblock( rdec->infd_, rdec->buffer, Rd_buffer_size ); + if( rdec->stream_pos != Rd_buffer_size && errno ) + { show_error( "read error", errno, false ); cleanup_and_fail( 1 ); } + rdec->at_stream_end = ( rdec->stream_pos < Rd_buffer_size ); + rdec->partial_member_pos += rdec->pos; + rdec->pos = 0; + } + return !Rd_finished( rdec ); } @@ -59,13 +62,15 @@ void LZd_flush_data( struct LZ_decoder * const decoder ) bool LZd_verify_trailer( struct LZ_decoder * const decoder, struct Pretty_print * const pp ) { - bool error = false; File_trailer trailer; - const int trailer_size = Ft_size( decoder->format_version ); + const int trailer_size = Ft_versioned_size( decoder->format_version ); + const long long member_size = LZd_member_position( decoder ) + trailer_size; + bool error = false; + for( int i = 0; i < trailer_size && !error; ++i ) { - if( !Rd_finished( &decoder->range_decoder ) ) - trailer[i] = Rd_get_byte( &decoder->range_decoder ); + if( !Rd_finished( decoder->range_decoder ) ) + trailer[i] = Rd_get_byte( decoder->range_decoder ); else { error = true; @@ -73,13 +78,13 @@ bool LZd_verify_trailer( struct LZ_decoder * const decoder, { Pp_show_msg( pp, 0 ); fprintf( stderr, "trailer truncated at trailer position %d;" - " some checks may fail.\n", i ); + " some checks may fail.\n", i ); } + for( ; i < trailer_size; ++i ) trailer[i] = 0; } } - if( decoder->format_version == 0 ) - Ft_set_member_size( trailer, LZd_member_position( decoder ) ); - if( !Rd_code_is_zero( &decoder->range_decoder ) ) + if( decoder->format_version == 0 ) Ft_set_member_size( trailer, member_size ); + if( !Rd_code_is_zero( decoder->range_decoder ) ) { error = true; if( verbosity >= 0 ) @@ -105,18 +110,18 @@ bool LZd_verify_trailer( struct LZ_decoder * const decoder, if( verbosity >= 0 ) { Pp_show_msg( pp, 0 ); - fprintf( stderr, "data size mismatch; trailer says %lld, data size is %lld.\n", - Ft_get_data_size( trailer ), LZd_data_position( decoder ) ); + fprintf( stderr, "data size mismatch; trailer says %lld, data size is %lld (0x%llX).\n", + Ft_get_data_size( trailer ), LZd_data_position( decoder ), LZd_data_position( decoder ) ); } } - if( Ft_get_member_size( trailer ) != LZd_member_position( decoder ) ) + if( Ft_get_member_size( trailer ) != member_size ) { error = true; if( verbosity >= 0 ) { Pp_show_msg( pp, 0 ); - fprintf( stderr, "member size mismatch; trailer says %lld, member size is %lld.\n", - Ft_get_member_size( trailer ), LZd_member_position( decoder ) ); + fprintf( stderr, "member size mismatch; trailer says %lld, member size is %lld (0x%llX).\n", + Ft_get_member_size( trailer ), member_size, member_size ); } } if( !error && verbosity >= 3 ) @@ -137,41 +142,42 @@ int LZd_decode_member( struct LZ_decoder * const decoder, unsigned int rep2 = 0; // repeated distances unsigned int rep3 = 0; State state = 0; + Rd_load( decoder->range_decoder ); while( true ) { - if( Rd_finished( &decoder->range_decoder ) ) + if( Rd_finished( decoder->range_decoder ) ) { LZd_flush_data( decoder ); return 2; } const int pos_state = LZd_data_position( decoder ) & pos_state_mask; - if( Rd_decode_bit( &decoder->range_decoder, &decoder->bm_match[state][pos_state] ) == 0 ) + if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_match[state][pos_state] ) == 0 ) { const uint8_t prev_byte = LZd_get_byte( decoder, 0 ); if( St_is_char( state ) ) - LZd_put_byte( decoder, Lid_decode( &decoder->literal_decoder, &decoder->range_decoder, prev_byte ) ); + LZd_put_byte( decoder, Lid_decode( &decoder->literal_decoder, decoder->range_decoder, prev_byte ) ); else - LZd_put_byte( decoder, Lid_decode_matched( &decoder->literal_decoder, &decoder->range_decoder, prev_byte, + LZd_put_byte( decoder, Lid_decode_matched( &decoder->literal_decoder, decoder->range_decoder, prev_byte, LZd_get_byte( decoder, rep0 ) ) ); St_set_char( &state ); } else { int len; - if( Rd_decode_bit( &decoder->range_decoder, &decoder->bm_rep[state] ) == 1 ) + if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep[state] ) == 1 ) { len = 0; - if( Rd_decode_bit( &decoder->range_decoder, &decoder->bm_rep0[state] ) == 0 ) + if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep0[state] ) == 0 ) { - if( Rd_decode_bit( &decoder->range_decoder, &decoder->bm_len[state][pos_state] ) == 0 ) + if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_len[state][pos_state] ) == 0 ) { len = 1; St_set_short_rep( &state ); } } else { unsigned int distance; - if( Rd_decode_bit( &decoder->range_decoder, &decoder->bm_rep1[state] ) == 0 ) + if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep1[state] ) == 0 ) distance = rep1; else { - if( Rd_decode_bit( &decoder->range_decoder, &decoder->bm_rep2[state] ) == 0 ) + if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep2[state] ) == 0 ) distance = rep2; else { distance = rep3; rep3 = rep2; } rep2 = rep1; @@ -181,30 +187,30 @@ int LZd_decode_member( struct LZ_decoder * const decoder, } if( len == 0 ) { - len = min_match_len + Led_decode( &decoder->rep_match_len_decoder, &decoder->range_decoder, pos_state ); + len = min_match_len + Led_decode( &decoder->rep_match_len_decoder, decoder->range_decoder, pos_state ); St_set_rep( &state ); } } else { unsigned int rep0_saved = rep0; - len = min_match_len + Led_decode( &decoder->len_decoder, &decoder->range_decoder, pos_state ); - const int dis_slot = Rd_decode_tree( &decoder->range_decoder, decoder->bm_dis_slot[get_dis_state(len)], dis_slot_bits ); + len = min_match_len + Led_decode( &decoder->len_decoder, decoder->range_decoder, pos_state ); + const int dis_slot = Rd_decode_tree( decoder->range_decoder, decoder->bm_dis_slot[get_dis_state(len)], dis_slot_bits ); if( dis_slot < start_dis_model ) rep0 = dis_slot; else { const int direct_bits = ( dis_slot >> 1 ) - 1; rep0 = ( 2 | ( dis_slot & 1 ) ) << direct_bits; if( dis_slot < end_dis_model ) - rep0 += Rd_decode_tree_reversed( &decoder->range_decoder, decoder->bm_dis + rep0 - dis_slot, direct_bits ); + rep0 += Rd_decode_tree_reversed( decoder->range_decoder, decoder->bm_dis + rep0 - dis_slot, direct_bits ); else { - rep0 += Rd_decode( &decoder->range_decoder, direct_bits - dis_align_bits ) << dis_align_bits; - rep0 += Rd_decode_tree_reversed( &decoder->range_decoder, decoder->bm_align, dis_align_bits ); - if( rep0 == 0xFFFFFFFF ) // Marker found + rep0 += Rd_decode( decoder->range_decoder, direct_bits - dis_align_bits ) << dis_align_bits; + rep0 += Rd_decode_tree_reversed( decoder->range_decoder, decoder->bm_align, dis_align_bits ); + if( rep0 == 0xFFFFFFFFU ) // Marker found { rep0 = rep0_saved; - Rd_normalize( &decoder->range_decoder ); + Rd_normalize( decoder->range_decoder ); LZd_flush_data( decoder ); if( len == min_match_len ) // End Of Stream marker { @@ -212,7 +218,7 @@ int LZd_decode_member( struct LZ_decoder * const decoder, } if( len == min_match_len + 1 ) // Sync Flush marker { - Rd_reload( &decoder->range_decoder ); continue; + Rd_load( decoder->range_decoder ); continue; } if( verbosity >= 0 ) { |