From: Nathan Moinvaziri <nathan@nathanm.com>
Date: Mon, 4 Jan 2021 05:34:57 +0000 (-0800)
Subject: Improve check_match output to print hex values of mismatch characters and character... 
X-Git-Tag: v2.0.0-RC1~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=692f4d9c483826f015e01ad7b11c4d22f46df936;p=thirdparty%2Fzlib-ng.git

Improve check_match output to print hex values of mismatch characters and character index.
---

diff --git a/deflate.c b/deflate.c
index 0f03656b..0d1d80c7 100644
--- a/deflate.c
+++ b/deflate.c
@@ -1203,9 +1203,10 @@ void check_match(deflate_state *s, Pos start, Pos match, int length) {
     }
     /* check that the match is indeed a match */
     if (memcmp(s->window + match, s->window + start, length) != EQUAL) {
+        int32_t i = 0;
         fprintf(stderr, " start %u, match %u, length %d\n", start, match, length);
         do {
-            fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
+            fprintf(stderr, "  %03d: match [%02x] start [%02x]\n", i++, s->window[match++], s->window[start++]);
         } while (--length != 0);
         z_error("invalid match");
     }