tmgoff.c revision 34f9b3eef6fdadbda0a846aa4d68691ac40eace5
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* 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>
#include <ctype.h>
/*
* return minutes offset from absolute timezone expression
*
* [[-+]hh[:mm[:ss]]]
* [-+]hhmm
*
* if e is non-null then it points to the first unrecognized char in s
* d returned if no offset in s
*/
int
tmgoff(register const char* s, char** e, int d)
{
register int n = d;
int east;
const char* t = s;
{
s++;
{
n = ((*s - '0') * 10 + (*(s + 1) - '0')) * 60;
s += 2;
if (*s == ':')
s++;
{
n += ((*s - '0') * 10 + (*(s + 1) - '0'));
s += 2;
if (*s == ':')
s++;
s += 2;
}
if (east)
n = -n;
t = s;
}
}
if (e)
*e = (char*)t;
return n;
}