*/
/*
- * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
- * We keep our own copy of this algorithm for 2 main reasons:
+ * We keep our own copy of this algorithm for 3 main reasons:
* 1. If we didn't, anyone modifying common/os/compress.c would
* directly break our on disk format
* 2. Our version of lzjb does not have a number of checks that the
* 3. We initialize the lempel to ensure deterministic results,
* so that identical blocks can always be deduplicated.
* In particular, we are adding the "feature" that compress() can
- * take a destination buffer size and return -1 if the data will not
- * compress to d_len or less.
+ * take a destination buffer size and returns the compressed length, or the
+ * source length if compression would overflow the destination buffer.
*/
#include <sys/types.h>
{
uchar_t *src = s_start;
uchar_t *dst = d_start;
- uchar_t *cpy, *copymap;
+ uchar_t *cpy, *copymap = NULL;
int copymask = 1 << (NBBY - 1);
int mlen, offset, hash;
uint16_t *hp;
uchar_t *src = s_start;
uchar_t *dst = d_start;
uchar_t *d_end = (uchar_t *)d_start + d_len;
- uchar_t *cpy, copymap;
+ uchar_t *cpy, copymap = 0;
int copymask = 1 << (NBBY - 1);
while (dst < d_end) {