wmii

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vsnprint.c (1203B)


      1 /*
      2  * The authors of this software are Rob Pike and Ken Thompson.
      3  *              Copyright (c) 2002 by Lucent Technologies.
      4  * Permission to use, copy, modify, and distribute this software for any
      5  * purpose without fee is hereby granted, provided that this entire notice
      6  * is included in all copies of any software which is or includes a copy
      7  * or modification of this software and in all copies of the supporting
      8  * documentation for such software.
      9  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
     10  * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
     11  * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
     12  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
     13  */
     14 #include <stdlib.h>
     15 #include <stdarg.h>
     16 #include "plan9.h"
     17 #include "fmt.h"
     18 #include "fmtdef.h"
     19 
     20 int
     21 vsnprint(char *buf, int len, const char *fmt, va_list args)
     22 {
     23 	Fmt f;
     24 
     25 	if(len <= 0)
     26 		return -1;
     27 	f.runes = 0;
     28 	f.start = buf;
     29 	f.to = buf;
     30 	f.stop = buf + len - 1;
     31 	f.flush = 0;
     32 	f.farg = nil;
     33 	f.nfmt = 0;
     34 	va_copy(f.args,args);
     35 	fmtlocaleinit(&f, nil, nil, nil);
     36 	dofmt(&f, fmt);
     37 	va_end(f.args);
     38 	*(char*)f.to = '\0';
     39 	return (char*)f.to - buf;
     40 }