1 /* Copyright (c) 2002-2006 Lucent Technologies; see LICENSE */
2 #include <stdlib.h>
3 #include <stdarg.h>
4 #include "plan9.h"
5 #include "fmt.h"
6 #include "fmtdef.h"
7 
8 int
9 vsnprint(char *buf, int len, char *fmt, va_list args)
10 {
11 	Fmt f;
12 
13 	if(len <= 0)
14 		return -1;
15 	f.runes = 0;
16 	f.start = buf;
17 	f.to = buf;
18 	f.stop = buf + len - 1;
19 	f.flush = 0;
20 	f.farg = nil;
21 	f.nfmt = 0;
22 	VA_COPY(f.args,args);
23 	fmtlocaleinit(&f, nil, nil, nil);
24 	dofmt(&f, fmt);
25 	VA_END(f.args);
26 	*(char*)f.to = '\0';
27 	return (char*)f.to - buf;
28 }