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authorMark Adler <madler@alumni.caltech.edu>2012-08-12 18:08:52 -0700
committerMark Adler <madler@alumni.caltech.edu>2012-08-13 00:02:40 -0700
commit62d6112a7981ad7c34f3b43cffdf00d4662a4f25 (patch)
treeaed93070f7e1be31868dce1d62a1de6ffc1360f9 /gzread.c
parentfb4e0599a5ddaef9eee726f786b9edef4943432b (diff)
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Clean up the usage of z_const and respect const usage within zlib.
This patch allows zlib to compile cleanly with the -Wcast-qual gcc warning enabled, but only if ZLIB_CONST is defined, which adds const to next_in and msg in z_stream and in the in_func prototype. A --const option is added to ./configure which adds -DZLIB_CONST to the compile flags, and adds -Wcast-qual to the compile flags when ZLIBGCCWARN is set in the environment.
Diffstat (limited to 'gzread.c')
-rw-r--r--gzread.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/gzread.c b/gzread.c
index 8ace830..52985c9 100644
--- a/gzread.c
+++ b/gzread.c
@@ -58,7 +58,8 @@ local int gz_avail(state)
58 return -1; 58 return -1;
59 if (state->eof == 0) { 59 if (state->eof == 0) {
60 if (strm->avail_in) { /* copy what's there to the start */ 60 if (strm->avail_in) { /* copy what's there to the start */
61 unsigned char *p = state->in, *q = strm->next_in; 61 unsigned char *p = state->in;
62 unsigned const char *q = strm->next_in;
62 unsigned n = strm->avail_in; 63 unsigned n = strm->avail_in;
63 do { 64 do {
64 *p++ = *q++; 65 *p++ = *q++;