-/* Parse dates for touch.
+/* 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
#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>
# 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;
8, 10, or 12 digits, followed by optional .ss
(PDS_LEADING_YEAR | PDS_CENTURY | PDS_SECONDS)
- touch mmddhhmm[YY] FILE...
+ touch mmddhhmm[YY] FILE... (obsolescent)
8 or 10 digits
(PDS_TRAILING_YEAR)
*/
-/* FIXME: put these in posixtm.h */
-/* POSIX Date Syntax flags. */
-#define PDS_LEADING_YEAR 1
-#define PDS_TRAILING_YEAR 2
-#define PDS_CENTURY 4
-#define PDS_SECONDS 8
-
static int
year (const int *digit_pair, size_t n, int allow_century)
{
static int
posix_time_parse (const char *s, unsigned int syntax_bits)
{
- const char *dot;
+ const char *dot = NULL;
int pair[6];
int *p;
- int i;
+ unsigned int i;
size_t s_len = strlen (s);
size_t len = (((syntax_bits & PDS_SECONDS) && (dot = strchr (s, '.')))
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)
/* Parse a POSIX-style date and return it, or (time_t)-1 for an error. */
-struct tm *
-posixtime (const char *s)
+time_t
+posixtime (const char *s, unsigned int syntax_bits)
{
t.tm_isdst = -1;
- if (posix_time_parse (s))
+ 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)
+posixtm (const char *s, unsigned int syntax_bits)
{
- if (posixtime (s) == -1)
+ 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