From 34bb013b92a61233cc9feed7866a660e22693265 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Fri, 4 Mar 2011 23:39:41 +0000
Subject: [PATCH] Use the right asprintf since we don't support truly broken
 platforms right now.

---
 compat/asprintf.c | 42 +++++++++++++++++-------------------------
 1 file changed, 17 insertions(+), 25 deletions(-)

diff --git a/compat/asprintf.c b/compat/asprintf.c
index d7c6ec99..9bd576e8 100644
--- a/compat/asprintf.c
+++ b/compat/asprintf.c
@@ -1,4 +1,4 @@
-/* $Id: asprintf.c,v 1.6 2011-01-21 20:03:18 nicm Exp $ */
+/* $Id: asprintf.c,v 1.7 2011-03-04 23:39:41 nicm Exp $ */
 
 /*
  * Copyright (c) 2006 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -28,13 +28,13 @@
 #include "tmux.h"
 
 int
-asprintf(char **ret, const char *format, ...)
+asprintf(char **ret, const char *fmt, ...)
 {
 	va_list	ap;
 	int	n;
 
-	va_start(ap, format);
-	n = vasprintf(ret, format, ap);
+	va_start(ap, fmt);
+	n = vasprintf(ret, fmt, ap);
 	va_end(ap);
 
 	return (n);
@@ -43,28 +43,20 @@ asprintf(char **ret, const char *format, ...)
 int
 vasprintf(char **ret, const char *fmt, va_list ap)
 {
-	va_list       aq;
-	size_t        len;
-	char         *buf;
-	int           n;
+	int	 n;
 
-	len = 64;
-	buf = xmalloc(len);
+	if ((n = vsnprintf(NULL, 0, fmt, ap)) < 0)
+		goto error;
 
-	for (;;) {
-		va_copy(aq, ap);
-		n = vsnprintf(buf, len, fmt, aq);
-		va_end(aq);
-
-		if (n != -1) {
-			*ret = buf;
-			return (n);
-		}
-
-		if (len > SIZE_MAX / 2) {
-			xfree(buf);
-			return (-1);
-		}
-		len *= 2;
+	*ret = xmalloc(n + 1);
+	if ((n = vsnprintf(*ret, n + 1, fmt, ap)) < 0) {
+		xfree(*ret);
+		goto error;
 	}
+
+	return (n);
+
+error:
+	*ret = NULL;
+	return (-1);
 }