diff options
Diffstat (limited to 'lzlib.c')
| -rw-r--r-- | lzlib.c | 64 |
1 files changed, 32 insertions, 32 deletions
@@ -1,20 +1,20 @@ -/* Lzlib - Compression library for the lzip format - Copyright (C) 2009-2019 Antonio Diaz Diaz. +/* Lzlib - Compression library for the lzip format + Copyright (C) 2009-2021 Antonio Diaz Diaz. - This library is free software. Redistribution and use in source and - binary forms, with or without modification, are permitted provided - that the following conditions are met: + This library is free software. Redistribution and use in source and + binary forms, with or without modification, are permitted provided + that the following conditions are met: - 1. Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions, and the following disclaimer. - 2. Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions, and the following disclaimer in the + documentation and/or other materials provided with the distribution. - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ #include <stdbool.h> @@ -105,10 +105,11 @@ static bool verify_decoder( struct LZ_Decoder * const d ) } -/*------------------------- Misc Functions -------------------------*/ +/* ------------------------- Misc Functions ------------------------- */ -const char * LZ_version( void ) { return LZ_version_string; } +int LZ_api_version( void ) { return LZ_API_VERSION; } +const char * LZ_version( void ) { return LZ_version_string; } const char * LZ_strerror( const enum LZ_Errno lz_errno ) { @@ -135,7 +136,7 @@ int LZ_min_match_len_limit( void ) { return min_match_len_limit; } int LZ_max_match_len_limit( void ) { return max_match_len; } -/*---------------------- Compression Functions ----------------------*/ +/* --------------------- Compression Functions --------------------- */ struct LZ_Encoder * LZ_compress_open( const int dictionary_size, const int match_len_limit, @@ -226,8 +227,8 @@ int LZ_compress_restart_member( struct LZ_Encoder * const e, int LZ_compress_sync_flush( struct LZ_Encoder * const e ) { if( !verify_encoder( e ) || e->fatal ) return -1; - if( !Mb_flushing_or_end( &e->lz_encoder_base->mb ) ) - e->lz_encoder_base->mb.flushing = true; + if( !e->lz_encoder_base->mb.at_stream_end ) + e->lz_encoder_base->mb.sync_flush_pending = true; return 0; } @@ -235,24 +236,22 @@ int LZ_compress_sync_flush( struct LZ_Encoder * const e ) int LZ_compress_read( struct LZ_Encoder * const e, uint8_t * const buffer, const int size ) { - int out_size = 0; if( !verify_encoder( e ) || e->fatal ) return -1; if( size < 0 ) return 0; - do { + + { struct LZ_encoder_base * const eb = e->lz_encoder_base; + int out_size = Re_read_data( &eb->renc, buffer, size ); + /* minimize number of calls to encode_member */ + if( out_size < size || size == 0 ) + { if( ( e->flz_encoder && !FLZe_encode_member( e->flz_encoder ) ) || ( e->lz_encoder && !LZe_encode_member( e->lz_encoder ) ) ) { e->lz_errno = LZ_library_error; e->fatal = true; return -1; } - if( e->lz_encoder_base->mb.flushing && - Mb_available_bytes( &e->lz_encoder_base->mb ) <= 0 && - LZeb_sync_flush( e->lz_encoder_base ) ) - e->lz_encoder_base->mb.flushing = false; - out_size += Re_read_data( &e->lz_encoder_base->renc, - buffer + out_size, size - out_size ); + if( eb->mb.sync_flush_pending && Mb_available_bytes( &eb->mb ) <= 0 ) + LZeb_try_sync_flush( eb ); + out_size += Re_read_data( &eb->renc, buffer + out_size, size - out_size ); } - while( e->lz_encoder_base->mb.flushing && out_size < size && - Mb_enough_available_bytes( &e->lz_encoder_base->mb ) && - Re_enough_free_bytes( &e->lz_encoder_base->renc ) ); - return out_size; + return out_size; } } @@ -321,7 +320,7 @@ unsigned long long LZ_compress_total_out_size( struct LZ_Encoder * const e ) } -/*--------------------- Decompression Functions ---------------------*/ +/* -------------------- Decompression Functions -------------------- */ struct LZ_Decoder * LZ_decompress_open( void ) { @@ -401,10 +400,11 @@ int LZ_decompress_read( struct LZ_Decoder * const d, { int result; if( !verify_decoder( d ) ) return -1; + if( size < 0 ) return 0; if( d->fatal ) /* don't return error until pending bytes are read */ { if( d->lz_decoder && !Cb_empty( &d->lz_decoder->cb ) ) goto get_data; return -1; } - if( d->seeking || size < 0 ) return 0; + if( d->seeking ) return 0; if( d->lz_decoder && LZd_member_finished( d->lz_decoder ) ) { |