From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sun, 4 Jul 2021 03:55:21 +0000 (-0700)
Subject: take a const pointer in agstrdup_html
X-Git-Tag: 2.49.0~58^2~9
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b63067a178c118520ad34afcc83a7eec0ae67019;p=graphviz

take a const pointer in agstrdup_html

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/cgraph.h b/lib/cgraph/cgraph.h
index e2ea7f4ea..9526ee305 100644
--- a/lib/cgraph/cgraph.h
+++ b/lib/cgraph/cgraph.h
@@ -303,7 +303,7 @@ CGRAPH_API int agobjkind(void *);
 
 /* strings */
 CGRAPH_API char *agstrdup(Agraph_t *, const char *);
-CGRAPH_API char *agstrdup_html(Agraph_t *, char *);
+CGRAPH_API char *agstrdup_html(Agraph_t *, const char *);
 CGRAPH_API int aghtmlstr(char *);
 CGRAPH_API char *agstrbind(Agraph_t * g, char *);
 CGRAPH_API int agstrfree(Agraph_t *, char *);
diff --git a/lib/cgraph/refstr.c b/lib/cgraph/refstr.c
index 0c73fb120..e73c8cced 100644
--- a/lib/cgraph/refstr.c
+++ b/lib/cgraph/refstr.c
@@ -121,7 +121,7 @@ char *agstrdup(Agraph_t * g, const char *s)
     return r->s;
 }
 
-char *agstrdup_html(Agraph_t * g, char *s)
+char *agstrdup_html(Agraph_t * g, const char *s)
 {
     refstr_t *r;
     Dict_t *strdict;