Tag
Hash :
1045b39c
Author :
Date :
1998-12-31T14:53:16
(posix_time_parse): Change type of index `i' from int to unsigned int.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273
/* Parse dates for touch and date.
Copyright (C) 1989, 1990, 1991, 1998 Free Software Foundation Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Yacc-based version written by Jim Kingdon and David MacKenzie.
Rewritten by Jim Meyering. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#if HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif
#ifdef TM_IN_SYS_TIME
# include <sys/time.h>
#else
# include <time.h>
#endif
#include "posixtm.h"
/* ISDIGIT differs from isdigit, as follows:
- Its arg may be any int or unsigned int; it need not be an unsigned char.
- It's guaranteed to evaluate its argument exactly once.
- It's typically faster.
Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
only '0' through '9' are digits. Prefer ISDIGIT to isdigit unless
it's important to use the locale's definition of `digit' even when the
host does not conform to Posix. */
#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
/* The return value. */
static struct tm t;
time_t mktime ();
/*
POSIX requires:
touch -t [[CC]YY]mmddhhmm[.ss] FILE...
8, 10, or 12 digits, followed by optional .ss
(PDS_LEADING_YEAR | PDS_CENTURY | PDS_SECONDS)
touch mmddhhmm[YY] FILE... (obsolescent)
8 or 10 digits
(PDS_TRAILING_YEAR)
date mmddhhmm[[CC]YY]
8, 10, or 12 digits
(PDS_TRAILING_YEAR | PDS_CENTURY)
*/
static int
year (const int *digit_pair, size_t n, int allow_century)
{
switch (n)
{
case 1:
t.tm_year = *digit_pair;
/* Deduce the century based on the year.
See POSIX.2 section 4.63.3. */
if (digit_pair[0] <= 68)
t.tm_year += 100;
break;
case 2:
if (!allow_century)
return 1;
t.tm_year = digit_pair[0] * 100 + digit_pair[1];
if (t.tm_year < 1900)
return 1;
t.tm_year -= 1900;
break;
case 0:
{
time_t now;
struct tm *tmp;
/* Use current year. */
time (&now);
tmp = localtime (&now);
t.tm_year = tmp->tm_year;
}
break;
default:
abort ();
}
return 0;
}
static int
posix_time_parse (const char *s, unsigned int syntax_bits)
{
const char *dot = NULL;
int pair[6];
int *p;
unsigned int i;
size_t s_len = strlen (s);
size_t len = (((syntax_bits & PDS_SECONDS) && (dot = strchr (s, '.')))
? dot - s
: s_len);
if (len != 8 && len != 10 && len != 12)
return 1;
if (dot)
{
if (!(syntax_bits & PDS_SECONDS))
return 1;
if (s_len - len != 3)
return 1;
}
for (i = 0; i < len; i++)
if (!ISDIGIT (s[i]))
return 1;
len /= 2;
for (i = 0; i < len; i++)
pair[i] = 10 * (s[2*i] - '0') + s[2*i + 1] - '0';
p = pair;
if (syntax_bits & PDS_LEADING_YEAR)
{
if (year (p, len - 4, syntax_bits & PDS_CENTURY))
return 1;
p += len - 4;
len = 4;
}
/* Handle 8 digits worth of `MMDDhhmm'. */
if (*p < 1 || *p > 12)
return 1;
t.tm_mon = *p - 1;
++p; --len;
if (*p < 1 || *p > 31)
return 1;
t.tm_mday = *p;
++p; --len;
if (*p < 0 || *p > 23)
return 1;
t.tm_hour = *p;
++p; --len;
if (*p < 0 || *p > 59)
return 1;
t.tm_min = *p;
++p; --len;
/* Handle any trailing year. */
if (syntax_bits & PDS_TRAILING_YEAR)
{
if (year (p, len, syntax_bits & PDS_CENTURY))
return 1;
}
/* Handle seconds. */
if (!dot)
{
t.tm_sec = 0;
}
else
{
int seconds;
++dot;
if (!ISDIGIT (dot[0]) || !ISDIGIT (dot[1]))
return 1;
seconds = 10 * (dot[0] - '0') + dot[1] - '0';
if (seconds < 0 || seconds > 61)
return 1;
t.tm_sec = seconds;
}
return 0;
}
/* Parse a POSIX-style date and return it, or (time_t)-1 for an error. */
time_t
posixtime (const char *s, unsigned int syntax_bits)
{
t.tm_isdst = -1;
if (posix_time_parse (s, syntax_bits))
return (time_t)-1;
else
return mktime (&t);
}
/* Parse a POSIX-style date and return it, or NULL for an error. */
struct tm *
posixtm (const char *s, unsigned int syntax_bits)
{
if (posixtime (s, syntax_bits) == -1)
return NULL;
return &t;
}
#ifdef TEST_POSIXTIME
/*
Test mainly with syntax_bits == 13
(aka: (PDS_LEADING_YEAR | PDS_CENTURY | PDS_SECONDS))
BEGIN-DATA
1112131415 13 1323807300 Tue Dec 13 14:15:00 2011
1112131415.16 13 1323807316 Tue Dec 13 14:15:16 2011
201112131415.16 13 1323807316 Tue Dec 13 14:15:16 2011
191112131415.16 13 -1 ***
203712131415.16 13 2144348116 Sun Dec 13 14:15:16 2037
3712131415.16 13 2144348116 Sun Dec 13 14:15:16 2037
6812131415.16 13 -1 ***
6912131415.16 13 -1 ***
7012131415.16 13 29967316 Sun Dec 13 14:15:16 1970
12131415.16 13 913580116 Sun Dec 13 14:15:16 1998
1213141599 2 945116100 Mon Dec 13 14:15:00 1999
1213141500 2 976738500 Wed Dec 13 14:15:00 2000
END-DATA
*/
# define MAX_BUFF_LEN 1024
int
main ()
{
char buff[MAX_BUFF_LEN + 1];
buff[MAX_BUFF_LEN] = 0;
while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
{
char time_str[MAX_BUFF_LEN];
unsigned int syntax_bits;
time_t t;
char *result;
sscanf (buff, "%s %u", time_str, &syntax_bits);
t = posixtime (time_str, syntax_bits);
result = (t == (time_t) -1 ? "***" : ctime (&t));
printf ("%d %s\n", (int) t, result);
}
exit (0);
}
#endif