From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sat, 8 Oct 2022 22:19:31 +0000 (-0700)
Subject: common: mark 'Arrowdirs' constant
X-Git-Tag: 7.0.0~15^2~10
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9c058742e88863e67413f84b22d86109bd8ea800;p=graphviz

common: mark 'Arrowdirs' constant
---

diff --git a/lib/common/arrows.c b/lib/common/arrows.c
index e68f193cc..4e342eed2 100644
--- a/lib/common/arrows.c
+++ b/lib/common/arrows.c
@@ -50,7 +50,7 @@ typedef struct arrowdir_t {
     int eflag;
 } arrowdir_t;
 
-static arrowdir_t Arrowdirs[] = {
+static const arrowdir_t Arrowdirs[] = {
     {"forward", ARR_TYPE_NONE, ARR_TYPE_NORM},
     {"back", ARR_TYPE_NORM, ARR_TYPE_NONE},
     {"both", ARR_TYPE_NORM, ARR_TYPE_NORM},
@@ -202,12 +202,11 @@ static void arrow_match_name(char *name, int *flag)
 void arrow_flags(Agedge_t * e, int *sflag, int *eflag)
 {
     char *attr;
-    arrowdir_t *arrowdir;
 
     *sflag = ARR_TYPE_NONE;
     *eflag = agisdirected(agraphof(e)) ? ARR_TYPE_NORM : ARR_TYPE_NONE;
     if (E_dir && ((attr = agxget(e, E_dir)))[0]) {
-	for (arrowdir = Arrowdirs; arrowdir->dir; arrowdir++) {
+	for (const arrowdir_t *arrowdir = Arrowdirs; arrowdir->dir; arrowdir++) {
 	    if (streq(attr, arrowdir->dir)) {
 		*sflag = arrowdir->sflag;
 		*eflag = arrowdir->eflag;