xref: /onnv-gate/usr/src/lib/libast/common/tm/tmpoff.c (revision 12068:08a39a083754)
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  * Glenn Fowler
254887Schin  * AT&T Bell Laboratories
264887Schin  *
274887Schin  * time conversion support
284887Schin  */
294887Schin 
304887Schin #include <ast.h>
314887Schin #include <tm.h>
324887Schin 
334887Schin /*
344887Schin  * n is minutes west of UTC
354887Schin  *
364887Schin  * append p and SHHMM part of n to s
374887Schin  * where S is + or -
384887Schin  *
394887Schin  * n ignored if n==d
404887Schin  * end of s is returned
414887Schin  */
424887Schin 
434887Schin char*
tmpoff(register char * s,size_t z,register const char * p,register int n,int d)444887Schin tmpoff(register char* s, size_t z, register const char* p, register int n, int d)
454887Schin {
464887Schin 	register char*	e = s + z;
474887Schin 
484887Schin 	while (s < e && (*s = *p++))
494887Schin 		s++;
504887Schin 	if (n != d && s < e)
514887Schin 	{
524887Schin 		if (n < 0)
534887Schin 		{
544887Schin 			n = -n;
554887Schin 			*s++ = '+';
564887Schin 		}
574887Schin 		else
584887Schin 			*s++ = '-';
594887Schin 		s += sfsprintf(s, e - s, "%02d%02d", n / 60, n % 60);
604887Schin 	}
614887Schin 	return s;
624887Schin }
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