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-rw-r--r--compat/zlib/deflate.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/compat/zlib/deflate.c b/compat/zlib/deflate.c
index 2ad890e..1ec7614 100644
--- a/compat/zlib/deflate.c
+++ b/compat/zlib/deflate.c
@@ -52,7 +52,7 @@
#include "deflate.h"
const char deflate_copyright[] =
- " deflate 1.2.10 Copyright 1995-2017 Jean-loup Gailly and Mark Adler ";
+ " deflate 1.2.11 Copyright 1995-2017 Jean-loup Gailly and Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@@ -586,7 +586,8 @@ int ZEXPORT deflateParams(strm, level, strategy)
}
func = configuration_table[s->level].func;
- if ((strategy != s->strategy || func != configuration_table[level].func)) {
+ if ((strategy != s->strategy || func != configuration_table[level].func) &&
+ s->high_water) {
/* Flush the last buffer: */
int err = deflate(strm, Z_BLOCK);
if (err == Z_STREAM_ERROR)
@@ -1671,8 +1672,6 @@ local block_state deflate_stored(s, flush)
len = left + s->strm->avail_in; /* limit len to the input */
if (len > have)
len = have; /* limit len to the output */
- if (left > len)
- left = len; /* limit window pull to len */
/* If the stored block would be less than min_block in length, or if
* unable to copy all of the available input when flushing, then try
@@ -1681,13 +1680,13 @@ local block_state deflate_stored(s, flush)
*/
if (len < min_block && ((len == 0 && flush != Z_FINISH) ||
flush == Z_NO_FLUSH ||
- len - left != s->strm->avail_in))
+ len != left + s->strm->avail_in))
break;
/* Make a dummy stored block in pending to get the header bytes,
* including any pending bits. This also updates the debugging counts.
*/
- last = flush == Z_FINISH && len - left == s->strm->avail_in ? 1 : 0;
+ last = flush == Z_FINISH && len == left + s->strm->avail_in ? 1 : 0;
_tr_stored_block(s, (char *)0, 0L, last);
/* Replace the lengths in the dummy stored block with len. */
@@ -1699,14 +1698,16 @@ local block_state deflate_stored(s, flush)
/* Write the stored block header bytes. */
flush_pending(s->strm);
- /* Update debugging counts for the data about to be copied. */
#ifdef ZLIB_DEBUG
+ /* Update debugging counts for the data about to be copied. */
s->compressed_len += len << 3;
s->bits_sent += len << 3;
#endif
/* Copy uncompressed bytes from the window to next_out. */
if (left) {
+ if (left > len)
+ left = len;
zmemcpy(s->strm->next_out, s->window + s->block_start, left);
s->strm->next_out += left;
s->strm->avail_out -= left;
@@ -1756,6 +1757,8 @@ local block_state deflate_stored(s, flush)
s->block_start = s->strstart;
s->insert += MIN(used, s->w_size - s->insert);
}
+ if (s->high_water < s->strstart)
+ s->high_water = s->strstart;
/* If the last block was written to next_out, then done. */
if (last)
@@ -1783,6 +1786,8 @@ local block_state deflate_stored(s, flush)
read_buf(s->strm, s->window + s->strstart, have);
s->strstart += have;
}
+ if (s->high_water < s->strstart)
+ s->high_water = s->strstart;
/* There was not enough avail_out to write a complete worthy or flushed
* stored block to next_out. Write a stored block to pending instead, if we