lzip/lunzip
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Merging upstream version 1.8.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-17 22:21:50 +01:00
parent 537cdc9d2e
commit 6b43515a10
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
14 changed files with 315 additions and 167 deletions
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20
decoder.h
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@ -1,5 +1,5 @@
/* Lunzip - Decompressor for the lzip format
Copyright (C) 2010-2015 Antonio Diaz Diaz.
Copyright (C) 2010-2016 Antonio Diaz Diaz.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -60,7 +60,8 @@ static inline void Rd_reset_member_position( struct Range_decoder * const rdec )
static inline uint8_t Rd_get_byte( struct Range_decoder * const rdec )
{
if( Rd_finished( rdec ) ) return 0xAA; /* make code != 0 */
/* 0xFF avoids decoder error if member is truncated at EOS marker */
if( Rd_finished( rdec ) ) return 0xFF;
return rdec->buffer[rdec->pos++];
}
@ -238,6 +239,7 @@ struct LZ_decoder
int stream_pos; /* first byte not yet written to file */
uint32_t crc;
int outfd; /* output file descriptor */
bool pos_wrapped;
Bit_model bm_literal[1<<literal_context_bits][0x300];
Bit_model bm_match[states][pos_states];
@ -288,10 +290,15 @@ static inline void LZd_copy_block( struct LZ_decoder * const d,
const int distance, int len )
{
int i = d->pos - distance - 1;
if( i < 0 ) i += d->buffer_size;
if( len < d->buffer_size - max( d->pos, i ) && len <= abs( d->pos - i ) )
bool fast;
if( i < 0 )
{ i += d->buffer_size;
fast = ( len <= d->buffer_size - i && len <= i - d->pos ); }
else
fast = ( len < d->buffer_size - d->pos && len <= d->pos - i );
if( fast ) /* no wrap, no overlap */
{
memcpy( d->buffer + d->pos, d->buffer + i, len ); /* no wrap, no overlap */
memcpy( d->buffer + d->pos, d->buffer + i, len );
d->pos += len;
}
else for( ; len > 0; --len )
@ -330,13 +337,14 @@ static inline bool LZd_init( struct LZ_decoder * const d,
d->partial_data_pos = 0;
d->rdec = rde;
d->dictionary_size = dict_size;
d->buffer_size = min( buffer_size, max( 65536, dict_size ) );
d->buffer_size = min( buffer_size, dict_size );
d->buffer = (uint8_t *)malloc( d->buffer_size );
if( !d->buffer ) return false;
d->pos = 0;
d->stream_pos = 0;
d->crc = 0xFFFFFFFFU;
d->outfd = ofd;
d->pos_wrapped = false;
Bm_array_init( d->bm_literal[0], (1 << literal_context_bits) * 0x300 );
Bm_array_init( d->bm_match[0], states * pos_states );