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 Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Written by Jim Kingdon and David MacKenzie. */
25 /* The following block of alloca-related preprocessor directives is here
26 solely to allow compilation by non GNU-C compilers of the C parser
27 produced from this file by old versions of bison. Newer versions of
28 bison include a block similar to this one in bison.simple. */
31 #define alloca __builtin_alloca
45 #include <sys/types.h>
53 /* Some old versions of bison generate parsers that use bcopy.
54 That loses on systems that don't provide the function, so we have
55 to redefine it here. */
56 #if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy)
57 #define bcopy(from, to, len) memcpy ((to), (from), (len))
62 /* Lexical analyzer's current scan position in the input string. */
65 /* The return value. */
70 #define yyparse posixtime_yyparse
72 static int yyerror ();
82 digitpair /* minutes */
85 if ($1 >= 1 && $1 <= 12)
90 if ($2 >= 1 && $2 <= 31)
95 if ($3 >= 0 && $3 <= 23)
100 if ($4 >= 0 && $4 <= 59)
109 /* Deduce the century based on the year.
110 See POSIX.2 section 4.63.3. */
114 | digitpair digitpair {
115 t.tm_year = $1 * 100 + $2;
116 if (t.tm_year < 1900) {
125 /* Use current year. */
127 tmp = localtime (&now);
128 t.tm_year = tmp->tm_year;
132 seconds : /* empty */ {
136 if ($2 >= 0 && $2 <= 61)
144 digitpair : DIGIT DIGIT {
154 if (ch >= '0' && ch <= '9')
159 else if (ch == '.' || ch == 0)
162 return '?'; /* Cause an error. */
171 /* Parse a POSIX-style date and return it, or (time_t)-1 for an error. */
178 /* Let mktime decide whether it is daylight savings time. */
186 /* Parse a POSIX-style date and return it, or NULL for an error. */
192 if (posixtime (s) == -1)