1 /* Parse dates for touch.
2 Copyright (C) 1989, 1990, 1991 Free Software Foundation Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /* Written by Jim Kingdon and David MacKenzie. */
21 #define alloca __builtin_alloca
35 #if defined (CONFIG_BROKETS)
36 /* We use <config.h> instead of "config.h" so that a compilation
37 using -I. -I will use ./config.h rather than /config.h
38 (which it would do because it found this file in ). */
46 #include <sys/types.h>
54 /* Some old versions of bison generate parsers that use bcopy.
55 That loses on systems that don't provide the function, so we have
56 to redefine it here. */
57 #if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy)
58 #define bcopy(from, to, len) memcpy ((to), (from), (len))
63 /* Lexical analyzer's current scan position in the input string. */
66 /* The return value. */
71 #define yyparse posixtime_yyparse
73 static int yyerror ();
83 digitpair /* minutes */
86 if ($1 >= 1 && $1 <= 12)
91 if ($2 >= 1 && $2 <= 31)
96 if ($3 >= 0 && $3 <= 23)
101 if ($4 >= 0 && $4 <= 59)
110 /* Deduce the century based on the year.
111 See POSIX.2 section 4.63.3. */
115 | digitpair digitpair {
116 t.tm_year = $1 * 100 + $2;
117 if (t.tm_year < 1900) {
126 /* Use current year. */
128 tmp = localtime (&now);
129 t.tm_year = tmp->tm_year;
133 seconds : /* empty */ {
137 if ($2 >= 0 && $2 <= 61)
145 digitpair : DIGIT DIGIT {
155 if (ch >= '0' && ch <= '9')
160 else if (ch == '.' || ch == 0)
163 return '?'; /* Cause an error. */
172 /* Parse a POSIX-style date and return it, or (time_t)-1 for an error. */
179 /* Let mktime decide whether it is daylight savings time. */
187 /* Parse a POSIX-style date and return it, or NULL for an error. */
193 if (posixtime (s) == -1)