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rbutil: Merge rbutil with utils folder.

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rbutil uses several components from the utils folder, and can be
considered part of utils too. Having it in a separate folder is an
arbitrary split that doesn't help anymore these days, so merge them.

This also allows other utils to easily use libtools.make without the
need to navigate to a different folder.

Change-Id: I3fc2f4de19e3e776553efb5dea5f779dfec0dc21
This commit is contained in:
Dominik Riebeling 2021-12-15 21:04:28 +01:00
parent 6c6f0757d7
commit c876d3bbef
494 changed files with 13 additions and 13 deletions
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93
utils/rbutilqt/mspack/lzssd.c Normal file
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/* This file is part of libmspack.
* (C) 2003-2010 Stuart Caie.
*
* LZSS is a derivative of LZ77 and was created by James Storer and
* Thomas Szymanski in 1982. Haruhiko Okumura wrote a very popular C
* implementation.
*
* libmspack is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License (LGPL) version 2.1
*
* For further details, see the file COPYING.LIB distributed with libmspack
*/
#include "system-mspack.h"
#include "lzss.h"
#define ENSURE_BYTES do { \
if (i_ptr >= i_end) { \
read = system->read(input, &inbuf[0], \
input_buffer_size); \
if (read <= 0) { \
system->free(window); \
return (read < 0) ? MSPACK_ERR_READ \
: MSPACK_ERR_OK; \
} \
i_ptr = &inbuf[0]; i_end = &inbuf[read]; \
} \
} while (0)
#define WRITE_BYTE do { \
if (system->write(output, &window[pos], 1) != 1) { \
system->free(window); \
return MSPACK_ERR_WRITE; \
} \
} while (0)
int lzss_decompress(struct mspack_system *system,
struct mspack_file *input,
struct mspack_file *output,
int input_buffer_size,
int mode)
{
unsigned char *window, *inbuf, *i_ptr, *i_end;
unsigned int pos, i, c, invert, mpos, len;
int read;
/* check parameters */
if (!system || input_buffer_size < 1 || (mode != LZSS_MODE_EXPAND &&
mode != LZSS_MODE_MSHELP && mode != LZSS_MODE_QBASIC))
{
return MSPACK_ERR_ARGS;
}
/* allocate memory */
window = (unsigned char *) system->alloc(system, LZSS_WINDOW_SIZE + input_buffer_size);
if (!window) return MSPACK_ERR_NOMEMORY;
/* initialise decompression */
inbuf = &window[LZSS_WINDOW_SIZE];
memset(window, LZSS_WINDOW_FILL, (size_t) LZSS_WINDOW_SIZE);
pos = LZSS_WINDOW_SIZE - ((mode == LZSS_MODE_QBASIC) ? 18 : 16);
invert = (mode == LZSS_MODE_MSHELP) ? ~0 : 0;
i_ptr = i_end = &inbuf[0];
/* loop forever; exit condition is in ENSURE_BYTES macro */
for (;;) {
ENSURE_BYTES; c = *i_ptr++ ^ invert;
for (i = 0x01; i & 0xFF; i <<= 1) {
if (c & i) {
/* literal */
ENSURE_BYTES; window[pos] = *i_ptr++;
WRITE_BYTE;
pos++; pos &= LZSS_WINDOW_SIZE - 1;
}
else {
/* match */
ENSURE_BYTES; mpos = *i_ptr++;
ENSURE_BYTES; mpos |= (*i_ptr & 0xF0) << 4;
len = (*i_ptr++ & 0x0F) + 3;
while (len--) {
window[pos] = window[mpos];
WRITE_BYTE;
pos++; pos &= LZSS_WINDOW_SIZE - 1;
mpos++; mpos &= LZSS_WINDOW_SIZE - 1;
}
}
}
}
/* not reached */
system->free(window);
return MSPACK_ERR_OK;
}