static void cabd_free_decomp(struct mscab_decompressor_p *handle) {
if (!handle || !handle->d || !handle->d->folder || !handle->d->state) return;
switch (handle->d->comp_type & cffoldCOMPTYPE_MASK) {
case cffoldCOMPTYPE_MSZIP: mszipd_free((mszipd_stream *)handle->d->state); break;
}
handle->d->decompress = NULL;
handle->d->state = NULL;
}
/***************************************
* KWAJD_EXTRACT
***************************************
* decompresses a KWAJ file
*/
static int kwajd_extract(struct mskwaj_decompressor *base,
struct mskwajd_header *hdr, const char *filename)
{
struct mskwaj_decompressor_p *self = (struct mskwaj_decompressor_p *) base;
struct mspack_system *sys;
struct mspack_file *fh, *outfh;
if (!self) return MSPACK_ERR_ARGS;
if (!hdr) return self->error = MSPACK_ERR_ARGS;
sys = self->system;
fh = ((struct mskwajd_header_p *) hdr)->fh;
/* seek to the compressed data */
if (sys->seek(fh, hdr->data_offset, MSPACK_SYS_SEEK_START)) {
return self->error = MSPACK_ERR_SEEK;
}
/* open file for output */
if (!(outfh = sys->open(sys, filename, MSPACK_SYS_OPEN_WRITE))) {
return self->error = MSPACK_ERR_OPEN;
}
self->error = MSPACK_ERR_OK;
/* decompress based on format */
if (hdr->comp_type == MSKWAJ_COMP_NONE ||
hdr->comp_type == MSKWAJ_COMP_XOR)
{
/* NONE is a straight copy. XOR is a copy xored with 0xFF */
unsigned char *buf = (unsigned char *) sys->alloc(sys, (size_t) KWAJ_INPUT_SIZE);
if (buf) {
int read, i;
while ((read = sys->read(fh, buf, KWAJ_INPUT_SIZE)) > 0) {
if (hdr->comp_type == MSKWAJ_COMP_XOR) {
for (i = 0; i < read; i++) buf[i] ^= 0xFF;
}
if (sys->write(outfh, buf, read) != read) {
self->error = MSPACK_ERR_WRITE;
break;
}
}
if (read < 0) self->error = MSPACK_ERR_READ;
sys->free(buf);
}
else {
self->error = MSPACK_ERR_NOMEMORY;
}
}
else if (hdr->comp_type == MSKWAJ_COMP_SZDD) {
self->error = lzss_decompress(sys, fh, outfh, KWAJ_INPUT_SIZE,
LZSS_MODE_EXPAND);
}
else if (hdr->comp_type == MSKWAJ_COMP_LZH) {
struct kwajd_stream *lzh = lzh_init(sys, fh, outfh);
self->error = (lzh) ? lzh_decompress(lzh) : MSPACK_ERR_NOMEMORY;
lzh_free(lzh);
}
else if (hdr->comp_type == MSKWAJ_COMP_MSZIP) {
struct mszipd_stream *zip = mszipd_init(sys,fh,outfh,KWAJ_INPUT_SIZE,0);
self->error = (zip) ? mszipd_decompress_kwaj(zip) : MSPACK_ERR_NOMEMORY;
mszipd_free(zip);
}
else {
self->error = MSPACK_ERR_DATAFORMAT;
}
/* close output file */
sys->close(outfh);
return self->error;
}
