void unReduce(void)
/* expand probablisticly reduced data */
{
int lchar;
int lout;
int I;
factor = cmethod - 1;
if ((factor < 1) || (factor > 4))
{
skip_csize();
return;
}
ExState = 0;
LoadFollowers();
lchar = 0;
while ((!zipeof) && (outpos < cusize))
{
if (Slen[lchar] == 0)
ReadBits(8,&lout);
else
{
ReadBits(1,&lout);
if (lout != 0)
ReadBits(8,&lout);
else
{
ReadBits(reduce_B(Slen[lchar]),&I);
lout = followers[lchar][I];
}
}
Expand(lout);
lchar = lout;
}
}
void CZipArchive::unReduce()
/* expand probabilistically reduced data */
{
int lchar;
int nchar;
int ExState;
int V;
int Len;
factor = lrec.compression_method - 1;
ExState = 0;
lchar = 0;
LoadFollowers();
while (((outpos + outcnt) < ucsize) && (!zipeof))
{
if (Slen[lchar] == 0)
READBIT(8, nchar) /* ; */
else {
READBIT(1, nchar);
if (nchar != 0)
READBIT(8, nchar) /* ; */
else {
int follower;
int bitsneeded = B_table[Slen[lchar]];
READBIT(bitsneeded, follower);
nchar = followers[lchar][follower];
}
}
/* expand the resulting byte */
switch (ExState)
{
case 0:
if (nchar != DLE)
OUTB(nchar);
else
ExState = 1;
break;
case 1:
if (nchar != 0) {
V = nchar;
Len = V & L_table[factor];
if (Len == L_table[factor])
ExState = 2;
else
ExState = 3;
} else {
OUTB(DLE);
ExState = 0;
}
break;
case 2:{
Len += nchar;
ExState = 3;
}
break;
case 3:{
int i = Len + 3;
int offset = (((V >> D_shift[factor]) &
D_mask[factor]) << 8) + nchar + 1;
long int op = (outpos + outcnt) - offset;
/* special case- before start of file */
while ((op < 0L) && (i > 0)) {
OUTB(0);
op++;
i--;
}
/* normal copy of data from output buffer */
{
register int ix = (int) (op % OUTBUFSIZ);
/* do a block memory copy if possible */
if (((ix + i) < OUTBUFSIZ) &&
((outcnt + i) < OUTBUFSIZ)) {
memcpy(outptr, &outbuf[ix], i);
outptr += i;
outcnt += i;
}
/* otherwise copy byte by byte */
else
while (i--) {
OUTB(outbuf[ix]);
if (++ix >= OUTBUFSIZ)
ix = 0;
}
}
ExState = 0;
}
break;
}
/* store character for next iteration */
lchar = nchar;
}
}
