From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sun, 4 Jul 2021 04:18:44 +0000 (-0700)
Subject: take a const pointer as the first argument to agcanonhtmlstr
X-Git-Tag: 2.49.0~58^2~2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9e1814a77dcb466cb7678df759fa2071d7afa5ed;p=graphviz

take a const pointer as the first argument to agcanonhtmlstr

This function does not modify its string argument, so it is more accurate to
qualify it as const. Related to #634.
---

diff --git a/lib/cgraph/write.c b/lib/cgraph/write.c
index a23c5e715..9515ab5ef 100644
--- a/lib/cgraph/write.c
+++ b/lib/cgraph/write.c
@@ -139,7 +139,7 @@ static char *_agstrcanon(char *arg, char *buf)
 /* agcanonhtmlstr:
  * Canonicalize html strings. 
  */
-static char *agcanonhtmlstr(char *arg, char *buf)
+static char *agcanonhtmlstr(const char *arg, char *buf)
 {
     sprintf(buf, "<%s>", arg);
     return buf;