updates from p9p

libc/fmtvprint.c

@@ -1,5 +1,20 @@
-#include <u.h>
-#include <libc.h>
+/*
+ * The authors of this software are Rob Pike and Ken Thompson.
+ *              Copyright (c) 2002 by Lucent Technologies.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose without fee is hereby granted, provided that this entire notice
+ * is included in all copies of any software which is or includes a copy
+ * or modification of this software and in all copies of the supporting
+ * documentation for such software.
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
+ * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+ */
+#include <stdarg.h>
+#include <string.h>
+#include "plan9.h"
+#include "fmt.h"
 #include "fmtdef.h"
 
 
@@ -17,13 +32,16 @@ fmtvprint(Fmt *f, char *fmt, va_list args)
 	f->flags = 0;
 	f->width = 0;
 	f->prec = 0;
-	va = f->args;
-	f->args = args;
+	VA_COPY(va,f->args);
+	VA_END(f->args);
+	VA_COPY(f->args,args);
 	n = dofmt(f, fmt);
 	f->flags = 0;
 	f->width = 0;
 	f->prec = 0;
-	f->args = va;
+	VA_END(f->args);
+	VA_COPY(f->args,va);
+	VA_END(va);
 	if(n >= 0)
 		return 0;
 	return n;