14887Schin /***********************************************************************
24887Schin * *
34887Schin * This software is part of the ast package *
4*12068SRoger.Faulkner@Oracle.COM * Copyright (c) 1985-2010 AT&T Intellectual Property *
54887Schin * and is licensed under the *
64887Schin * Common Public License, Version 1.0 *
78462SApril.Chin@Sun.COM * by AT&T Intellectual Property *
84887Schin * *
94887Schin * A copy of the License is available at *
104887Schin * http://www.opensource.org/licenses/cpl1.0.txt *
114887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
124887Schin * *
134887Schin * Information and Software Systems Research *
144887Schin * AT&T Research *
154887Schin * Florham Park NJ *
164887Schin * *
174887Schin * Glenn Fowler <gsf@research.att.com> *
184887Schin * David Korn <dgk@research.att.com> *
194887Schin * Phong Vo <kpv@research.att.com> *
204887Schin * *
214887Schin ***********************************************************************/
224887Schin #pragma prototyped
234887Schin
244887Schin #include "stdhdr.h"
254887Schin
264887Schin int
vsnprintf(char * s,int n,const char * fmt,va_list args)274887Schin vsnprintf(char* s, int n, const char* fmt, va_list args)
284887Schin {
294887Schin Sfio_t f;
304887Schin int v;
314887Schin
324887Schin if (!s)
334887Schin return -1;
344887Schin
354887Schin /*
364887Schin * make a fake stream
374887Schin */
384887Schin
394887Schin SFCLEAR(&f, NiL);
404887Schin f.flags = SF_STRING|SF_WRITE;
414887Schin f.bits = SF_PRIVATE;
424887Schin f.mode = SF_WRITE;
434887Schin f.size = n - 1;
444887Schin f.data = f.next = f.endr = (uchar*)s;
454887Schin f.endb = f.endw = f.data + f.size;
464887Schin
474887Schin /*
484887Schin * call and fix up
494887Schin */
504887Schin
514887Schin v = sfvprintf(&f, fmt, args);
524887Schin *f.next = 0;
534887Schin _Sfi = f.next - f.data;
544887Schin return v;
554887Schin }
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