1da2e3ebchin/***********************************************************************
2da2e3ebchin*                                                                      *
3da2e3ebchin*               This software is part of the ast package               *
43e14f97Roger A. Faulkner*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
5da2e3ebchin*                      and is licensed under the                       *
6da2e3ebchin*                  Common Public License, Version 1.0                  *
77c2fbfbApril Chin*                    by AT&T Intellectual Property                     *
8da2e3ebchin*                                                                      *
9da2e3ebchin*                A copy of the License is available at                 *
10da2e3ebchin*            http://www.opensource.org/licenses/cpl1.0.txt             *
11da2e3ebchin*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12da2e3ebchin*                                                                      *
13da2e3ebchin*              Information and Software Systems Research               *
14da2e3ebchin*                            AT&T Research                             *
15da2e3ebchin*                           Florham Park NJ                            *
16da2e3ebchin*                                                                      *
17da2e3ebchin*                 Glenn Fowler <gsf@research.att.com>                  *
18da2e3ebchin*                  David Korn <dgk@research.att.com>                   *
19da2e3ebchin*                   Phong Vo <kpv@research.att.com>                    *
20da2e3ebchin*                                                                      *
21da2e3ebchin***********************************************************************/
22da2e3ebchin#pragma prototyped
23da2e3ebchin/*
24da2e3ebchin * Glenn Fowler
25da2e3ebchin * AT&T Bell Laboratories
26da2e3ebchin *
27da2e3ebchin * time conversion support
28da2e3ebchin */
29da2e3ebchin
30da2e3ebchin#include <ast.h>
31da2e3ebchin#include <tm.h>
32da2e3ebchin#include <ctype.h>
33da2e3ebchin
34da2e3ebchin/*
35da2e3ebchin * return minutes offset from absolute timezone expression
36da2e3ebchin *
37da2e3ebchin *	[[-+]hh[:mm[:ss]]]
38da2e3ebchin *	[-+]hhmm
39da2e3ebchin *
40da2e3ebchin * if e is non-null then it points to the first unrecognized char in s
41da2e3ebchin * d returned if no offset in s
42da2e3ebchin */
43da2e3ebchin
44da2e3ebchinint
45da2e3ebchintmgoff(register const char* s, char** e, int d)
46da2e3ebchin{
47da2e3ebchin	register int	n = d;
48da2e3ebchin	int		east;
49da2e3ebchin	const char*	t = s;
50da2e3ebchin
51da2e3ebchin	if ((east = *s == '+') || *s == '-')
52da2e3ebchin	{
53da2e3ebchin		s++;
54da2e3ebchin		if (isdigit(*s) && isdigit(*(s + 1)))
55da2e3ebchin		{
56da2e3ebchin			n = ((*s - '0') * 10 + (*(s + 1) - '0')) * 60;
57da2e3ebchin			s += 2;
58da2e3ebchin			if (*s == ':')
59da2e3ebchin				s++;
60da2e3ebchin			if (isdigit(*s) && isdigit(*(s + 1)))
61da2e3ebchin			{
62da2e3ebchin				n += ((*s - '0') * 10 + (*(s + 1) - '0'));
63da2e3ebchin				s += 2;
64da2e3ebchin				if (*s == ':')
65da2e3ebchin					s++;
66da2e3ebchin				if (isdigit(*s) && isdigit(*(s + 1)))
67da2e3ebchin					s += 2;
68da2e3ebchin			}
69da2e3ebchin			if (east)
70da2e3ebchin				n = -n;
71da2e3ebchin			t = s;
72da2e3ebchin		}
73da2e3ebchin	}
74da2e3ebchin	if (e)
75da2e3ebchin		*e = (char*)t;
76da2e3ebchin	return n;
77da2e3ebchin}
78