From: ellson <devnull@localhost>
Date: Wed, 24 May 2006 14:44:12 +0000 (+0000)
Subject: fix a "dereferencing type-punned pointer will break strict-aliasing rules" warning
X-Git-Tag: LAST_LIBGRAPH~32^2~6559
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=58e0c19b20c6056d6731a8c391d8ebd765e64ced;p=graphviz

fix a "dereferencing type-punned pointer will break strict-aliasing rules" warning
---

diff --git a/lib/gd/fontwheeltest.c b/lib/gd/fontwheeltest.c
index b552b6a9c..b8e4f59ae 100644
--- a/lib/gd/fontwheeltest.c
+++ b/lib/gd/fontwheeltest.c
@@ -22,6 +22,8 @@ dowheel (gdImagePtr im, int color, char *fontfile, int fontsize,
 	double angle, int x, int y, int offset, char *string)
 {
   int brect[8];
+  gdPoint points[4];
+  int i;
   FILE *err;
   double curangrads, curang, x0, y0;
   char *cp;
@@ -49,7 +51,15 @@ dowheel (gdImagePtr im, int color, char *fontfile, int fontsize,
       if (cp)
 	doerr (err, cp);
 
-      gdImagePolygon (im, (gdPointPtr)brect, 4, color);
+      /* FIXME - this is silly, but if we try to cast int[] to gdPointPtr
+       * we get a "warning: dereferencing type-punned pointer will break strict -aliasing rules" from gcc
+       * The proper fix probably requires an API change to use gdPoint[] in gdImageString*
+       */
+      for (i = 0; i < 4; i++) {
+	points[i].x = brect[2*i];
+	points[i].y = brect[2*i + 1];
+      }
+      gdImagePolygon (im, points, 4, color);
     }
 
   fclose (err);