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authorDenis Vlasenko <vda.linux@googlemail.com>2007-01-10 20:50:04 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2007-01-10 20:50:04 +0000
commit7573541f74ab83e6501adf1a67210c8f99a6d885 (patch)
tree008efc06a84dc7510c4a033465b18a8975b86d69 /archival/libunarchive/decompress_unzip.c
parentbbe514683a43e81cab1d5ccc0436b9aaf984294b (diff)
downloadbusybox-7573541f74ab83e6501adf1a67210c8f99a6d885.tar.gz
fix bug 1146 (gunzip breakage introduced by me --vda)
Diffstat (limited to 'archival/libunarchive/decompress_unzip.c')
-rw-r--r--archival/libunarchive/decompress_unzip.c36
1 files changed, 19 insertions, 17 deletions
diff --git a/archival/libunarchive/decompress_unzip.c b/archival/libunarchive/decompress_unzip.c
index 424fe5190..f330a11ad 100644
--- a/archival/libunarchive/decompress_unzip.c
+++ b/archival/libunarchive/decompress_unzip.c
@@ -98,6 +98,8 @@ typedef struct state_t {
huft_t *inflate_codes_td;
unsigned inflate_codes_bl;
unsigned inflate_codes_bd;
+ unsigned inflate_codes_nn; /* length and index for copy */
+ unsigned inflate_codes_dd;
smallint resume_copy;
/* private data of inflate_get_next_window() */
@@ -132,6 +134,8 @@ typedef struct state_t {
#define inflate_codes_td (S()inflate_codes_td )
#define inflate_codes_bl (S()inflate_codes_bl )
#define inflate_codes_bd (S()inflate_codes_bd )
+#define inflate_codes_nn (S()inflate_codes_nn )
+#define inflate_codes_dd (S()inflate_codes_dd )
#define resume_copy (S()resume_copy )
#define method (S()method )
#define need_another_block (S()need_another_block )
@@ -460,6 +464,8 @@ static int huft_build(unsigned *b, const unsigned n,
#define td inflate_codes_td
#define bl inflate_codes_bl
#define bd inflate_codes_bd
+#define nn inflate_codes_nn
+#define dd inflate_codes_dd
static void inflate_codes_setup(STATE_PARAM huft_t * my_tl, huft_t * my_td, const unsigned my_bl, const unsigned my_bd)
{
tl = my_tl;
@@ -510,10 +516,6 @@ static int inflate_codes(STATE_PARAM_ONLY)
return 1; // We have a block to read
}
} else { /* it's an EOB or a length */
- /* length and index for copy */
- unsigned n = n; /* for gcc */
- unsigned d = d; /* for gcc */
-
/* exit if end of block */
if (e == 15) {
break;
@@ -521,7 +523,7 @@ static int inflate_codes(STATE_PARAM_ONLY)
/* get length of block to copy */
bb = fill_bitbuffer(PASS_STATE bb, &k, e);
- n = t->v.n + ((unsigned) bb & mask_bits[e]);
+ nn = t->v.n + ((unsigned) bb & mask_bits[e]);
bb >>= e;
k -= e;
@@ -544,40 +546,40 @@ static int inflate_codes(STATE_PARAM_ONLY)
bb >>= t->b;
k -= t->b;
bb = fill_bitbuffer(PASS_STATE bb, &k, e);
- d = w - t->v.n - ((unsigned) bb & mask_bits[e]);
+ dd = w - t->v.n - ((unsigned) bb & mask_bits[e]);
bb >>= e;
k -= e;
/* do the copy */
do_copy:
do {
- /* Was: n -= (e = (e = GUNZIP_WSIZE - ((d &= GUNZIP_WSIZE - 1) > w ? d : w)) > n ? n : e); */
+ /* Was: nn -= (e = (e = GUNZIP_WSIZE - ((dd &= GUNZIP_WSIZE - 1) > w ? dd : w)) > nn ? nn : e); */
/* Who wrote THAT?? rewritten as: */
- d &= GUNZIP_WSIZE - 1;
- e = GUNZIP_WSIZE - (d > w ? d : w);
- if (e > n) e = n;
- n -= e;
+ dd &= GUNZIP_WSIZE - 1;
+ e = GUNZIP_WSIZE - (dd > w ? dd : w);
+ if (e > nn) e = nn;
+ nn -= e;
/* copy to new buffer to prevent possible overwrite */
- if (w - d >= e) { /* (this test assumes unsigned comparison) */
- memcpy(gunzip_window + w, gunzip_window + d, e);
+ if (w - dd >= e) { /* (this test assumes unsigned comparison) */
+ memcpy(gunzip_window + w, gunzip_window + dd, e);
w += e;
- d += e;
+ dd += e;
} else {
/* do it slow to avoid memcpy() overlap */
/* !NOMEMCPY */
do {
- gunzip_window[w++] = gunzip_window[d++];
+ gunzip_window[w++] = gunzip_window[dd++];
} while (--e);
}
if (w == GUNZIP_WSIZE) {
gunzip_outbuf_count = w;
- resume_copy = (n != 0);
+ resume_copy = (nn != 0);
//flush_gunzip_window();
w = 0;
return 1;
}
- } while (n);
+ } while (nn);
resume_copy = 0;
}
}