tmpoff.c revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Bell Laboratories
*
* time conversion support
*/
#include <ast.h>
#include <tm.h>
/*
* n is minutes west of UTC
*
* append p and SHHMM part of n to s
* where S is + or -
*
* n ignored if n==d
* end of s is returned
*/
char*
tmpoff(register char* s, size_t z, register const char* p, register int n, int d)
{
register char* e = s + z;
while (s < e && (*s = *p++))
s++;
if (n != d && s < e)
{
if (n < 0)
{
n = -n;
*s++ = '+';
}
else
*s++ = '-';
s += sfsprintf(s, e - s, "%02d%s%02d", n / 60, d == -24*60 ? ":" : "", n % 60);
}
return s;
}