void decode(uint count, uchar buffer[])
/* The calling function must keep the number of
bytes to be processed. This function decodes
either 'count' bytes or 'DICSIZ' bytes, whichever
is smaller, into the array 'buffer[]' of size
'DICSIZ' or more.
Call decode_start() once for each new file
before calling this function. */
{
static uint i;
uint r, c;
r = 0;
while (--j >= 0) {
buffer[r] = buffer[i];
i = (i + 1) & (DICSIZ - 1);
if (++r == count) return;
}
for ( ; ; ) {
c = decode_c();
if (c <= UCHAR_MAX) {
buffer[r] = c;
if (++r == count) return;
} else {
j = c - (UCHAR_MAX + 1 - THRESHOLD);
i = (r - decode_p() - 1) & (DICSIZ - 1);
while (--j >= 0) {
buffer[r] = buffer[i];
i = (i + 1) & (DICSIZ - 1);
if (++r == count) return;
}
}
}
}
USHORT Unpack_HEAVY(UCHAR *in, UCHAR *out, UCHAR flags, USHORT origsize){
USHORT j, i, c, bitmask;
UCHAR *outend;
/* Heavy 1 uses a 4Kb dictionary, Heavy 2 uses 8Kb */
if (flags & 8) {
np = 15;
bitmask = 0x1fff;
} else {
np = 14;
bitmask = 0x0fff;
}
initbitbuf(in);
if (flags & 2) {
if (read_tree_c()) return 1;
if (read_tree_p()) return 2;
}
outend = out+origsize;
while (out<outend) {
c = decode_c();
if (c < 256) {
*out++ = text[heavy_text_loc++ & bitmask] = (UCHAR)c;
} else {
j = (USHORT) (c - OFFSET);
i = (USHORT) (heavy_text_loc - decode_p() - 1);
while(j--) *out++ = text[heavy_text_loc++ & bitmask] = text[i++ & bitmask];
}
}
return 0;
}
