50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
|
|
|
|
Copyright (c) 2011, 2012, Simon Howard
|
|
|
|
Permission to use, copy, modify, and/or distribute this software
|
|
for any purpose with or without fee is hereby granted, provided
|
|
that the above copyright notice and this permission notice appear
|
|
in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
|
|
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
|
|
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
|
|
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
|
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
|
|
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
*/
|
|
|
|
//
|
|
// Decoder for the -lh5- algorithm.
|
|
//
|
|
// This is the "new" algorithm that appeared in LHA v2, replacing
|
|
// the older -lh1-. -lh4- seems to be identical to -lh5-.
|
|
//
|
|
|
|
// 16 KiB history ring buffer:
|
|
|
|
#define HISTORY_BITS 14 /* 2^14 = 16384 */
|
|
|
|
// Number of bits to encode HISTORY_BITS:
|
|
|
|
#define OFFSET_BITS 4
|
|
|
|
// Name of the variable for the encoder:
|
|
|
|
#define DECODER_NAME lha_lh5_decoder
|
|
|
|
// Generate a second decoder for lh4 that just has a different
|
|
// block size.
|
|
|
|
#define DECODER2_NAME lha_lh4_decoder
|
|
|
|
// The actual algorithm code is contained in lh_new_decoder.c, which
|
|
// acts as a template for -lh4-, -lh5-, -lh6- and -lh7-.
|
|
|
|
#include "lh_new_decoder.c"
|
|
|