From b2f9ee0de55f3c59c83f479d12cfe8c894935bd7 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Wed, 13 Jul 2005 03:57:24 +0000
Subject: free subfonts correctly

---
 src/libdraw/stringwidth.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'src/libdraw/stringwidth.c')

diff --git a/src/libdraw/stringwidth.c b/src/libdraw/stringwidth.c
index 8d8c6d08..522fbc01 100644
--- a/src/libdraw/stringwidth.c
+++ b/src/libdraw/stringwidth.c
@@ -13,6 +13,7 @@ _stringnwidth(Font *f, char *s, Rune *r, int len)
 	Rune rune, **rptr;
 	char *subfontname, **sptr;
 	Font *def;
+	Subfont *sf;
 
 	if(s == nil){
 		s = "";
@@ -30,6 +31,7 @@ _stringnwidth(Font *f, char *s, Rune *r, int len)
 		if(len < max)
 			max = len;
 		n = 0;
+		sf = nil;
 		while((l = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname)) <= 0){
 			if(++n > 10){
 				if(*r)
@@ -40,19 +42,26 @@ _stringnwidth(Font *f, char *s, Rune *r, int len)
 					name = f->name;
 				else
 					name = "unnamed font";
+				freesubfont(sf);
 				fprint(2, "stringwidth: bad character set for rune 0x%.4ux in %s\n", rune, name);
 				return twid;
 			}
 			if(subfontname){
-				if(_getsubfont(f->display, subfontname) == 0){
-					def = f->display->defaultfont;
+				freesubfont(sf);
+				if((sf=_getsubfont(f->display, subfontname)) == 0){
+					def = f->display ? f->display->defaultfont : nil;
 					if(def && f!=def)
 						f = def;
 					else
 						break;
 				}
+				/* 
+				 * must not free sf until cachechars has found it in the cache
+				 * and picked up its own reference.
+				 */
 			}
 		}
+		freesubfont(sf);
 		agefont(f);
 		twid += wid;
 		len -= l;
-- 
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