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authorUlrich Drepper <drepper@redhat.com>1998-12-14 19:08:03 +0000
committerUlrich Drepper <drepper@redhat.com>1998-12-14 19:08:03 +0000
commitc2cfb5126b85ba4f0b6ec66567616ad221ea9429 (patch)
tree3feb637f20d5bf1c8db61a332637d44bca6bb068 /time/strptime.c
parent2eda5d9bb38063e7e2988811c2659246574307a3 (diff)
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Update.
* time/strptime.c (strptime_internal): Set tm_wday and tm_yday in any of tm_year, tm_mon, or tm_mday was changed and the value itself wasn't specified.
Diffstat (limited to 'time/strptime.c')
-rw-r--r--time/strptime.c81
1 files changed, 75 insertions, 6 deletions
diff --git a/time/strptime.c b/time/strptime.c
index e5879b1..d85dbfa 100644
--- a/time/strptime.c
+++ b/time/strptime.c
@@ -46,12 +46,13 @@
# endif /* GCC. */
#endif /* Not __P. */
-#if ! HAVE_LOCALTIME_R && ! defined (localtime_r)
-#ifdef _LIBC
-#define localtime_r __localtime_r
-#else
+
+#if ! HAVE_LOCALTIME_R && ! defined localtime_r
+# ifdef _LIBC
+# define localtime_r __localtime_r
+# else
/* Approximate localtime_r as best we can in its absence. */
-#define localtime_r my_localtime_r
+# define localtime_r my_localtime_r
static struct tm *localtime_r __P ((const time_t *, struct tm *));
static struct tm *
localtime_r (t, tp)
@@ -64,7 +65,7 @@ localtime_r (t, tp)
*tp = *l;
return tp;
}
-#endif /* ! _LIBC */
+# endif /* ! _LIBC */
#endif /* ! HAVE_LOCALTIME_R && ! defined (localtime_r) */
@@ -135,6 +136,7 @@ localtime_r (t, tp)
#ifdef _LIBC
/* This is defined in locale/C-time.c in the GNU libc. */
extern const struct locale_data _nl_C_LC_TIME;
+extern const unsigned short int __mon_yday[2][13];
# define weekday_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (DAY_1)].string)
# define ab_weekday_name \
@@ -176,11 +178,51 @@ static char const ab_month_name[][4] =
# define HERE_PM_STR "PM"
# define HERE_T_FMT_AMPM "%I:%M:%S %p"
# define HERE_T_FMT "%H:%M:%S"
+
+const unsigned short int __mon_yday[1][13] =
+ {
+ /* Normal years. */
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+ /* Leap years. */
+ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+ };
#endif
/* Status of lookup: do we use the locale data or the raw data? */
enum locale_status { not, loc, raw };
+
+#ifndef __isleap
+/* Nonzero if YEAR is a leap year (every 4 years,
+ except every 100th isn't, and every 400th is). */
+# define __isleap(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+#endif
+
+/* Compute the day of the week. */
+static void
+day_of_the_week (struct tm *tm)
+{
+ /* We know that January 1st 1970 was a Thursday (= 4). Compute the
+ the difference between this data in the one on TM and so determine
+ the weekday. */
+ int corr_year = tm->tm_mon >= 2 ? tm->tm_year : tm->tm_year - 1;
+ int wday = (-473
+ + (365 * (tm->tm_year - 1970))
+ + (corr_year / 4)
+ - ((corr_year / 4) / 25) + ((corr_year / 4) % 25 < 0)
+ + (((corr_year / 4) / 25) / 4)
+ + __mon_yday[0][tm->tm_mon]
+ + tm->tm_mday);
+ tm->tm_wday = wday;
+}
+
+static void
+day_of_the_year (struct tm *tm)
+{
+ tm->tm_yday = __mon_yday[__isleap (tm->tm_year)][tm->tm_mon] + tm->tm_mday;
+}
+
static char *
#ifdef _LIBC
internal_function
@@ -204,12 +246,15 @@ strptime_internal (buf, format, tm, decided)
size_t val;
int have_I, is_pm;
int century, want_century;
+ int have_wday, want_xday;
+ int have_yday;
rp = buf;
fmt = format;
have_I = is_pm = 0;
century = -1;
want_century = 0;
+ have_wday = want_xday = have_yday = 0;
while (*fmt != '\0')
{
@@ -280,6 +325,7 @@ strptime_internal (buf, format, tm, decided)
/* Does not match a weekday name. */
return NULL;
tm->tm_wday = cnt;
+ have_wday = 1;
break;
case 'b':
case 'B':
@@ -319,6 +365,7 @@ strptime_internal (buf, format, tm, decided)
/* Does not match a month name. */
return NULL;
tm->tm_mon = cnt;
+ want_xday = 1;
break;
case 'c':
/* Match locale's date and time format. */
@@ -335,6 +382,7 @@ strptime_internal (buf, format, tm, decided)
if (*decided == not &&
strcmp (_NL_CURRENT (LC_TIME, D_T_FMT), HERE_D_T_FMT))
*decided = loc;
+ want_xday = 1;
break;
}
*decided = raw;
@@ -342,11 +390,13 @@ strptime_internal (buf, format, tm, decided)
#endif
if (!recursive (HERE_D_T_FMT))
return NULL;
+ want_xday = 1;
break;
case 'C':
/* Match century number. */
get_number (0, 99);
century = val;
+ want_xday = 1;
break;
case 'd':
case 'e':
@@ -368,6 +418,7 @@ strptime_internal (buf, format, tm, decided)
if (decided == not
&& strcmp (_NL_CURRENT (LC_TIME, D_FMT), HERE_D_FMT))
*decided = loc;
+ want_xday = 1;
break;
}
*decided = raw;
@@ -378,6 +429,7 @@ strptime_internal (buf, format, tm, decided)
/* Match standard day format. */
if (!recursive (HERE_D_FMT))
return NULL;
+ want_xday = 1;
break;
case 'H':
/* Match hour in 24-hour clock. */
@@ -395,11 +447,13 @@ strptime_internal (buf, format, tm, decided)
/* Match day number of year. */
get_number (1, 366);
tm->tm_yday = val - 1;
+ have_yday = 1;
break;
case 'm':
/* Match number of month. */
get_number (1, 12);
tm->tm_mon = val - 1;
+ want_xday = 1;
break;
case 'M':
/* Match minute. */
@@ -519,6 +573,7 @@ strptime_internal (buf, format, tm, decided)
case 'u':
get_number (1, 7);
tm->tm_wday = val % 7;
+ have_wday = 1;
break;
case 'g':
get_number (0, 99);
@@ -544,6 +599,7 @@ strptime_internal (buf, format, tm, decided)
/* Match number of weekday. */
get_number (0, 6);
tm->tm_wday = val;
+ have_wday = 1;
break;
case 'y':
/* Match year within century. */
@@ -553,12 +609,14 @@ strptime_internal (buf, format, tm, decided)
tm->tm_year = val >= 69 ? val : val + 100;
/* Indicate that we want to use the century, if specified. */
want_century = 1;
+ want_xday = 1;
break;
case 'Y':
/* Match year including century number. */
get_number (0, 9999);
tm->tm_year = val - 1900;
want_century = 0;
+ want_xday = 1;
break;
case 'Z':
/* XXX How to handle this? */
@@ -585,6 +643,7 @@ strptime_internal (buf, format, tm, decided)
{
if (strcmp (fmt, HERE_D_T_FMT))
*decided = loc;
+ want_xday = 1;
break;
}
*decided = raw;
@@ -593,6 +652,7 @@ strptime_internal (buf, format, tm, decided)
normal representation. */
if (!recursive (HERE_D_T_FMT))
return NULL;
+ want_xday = 1;
break;
case 'C':
case 'y':
@@ -672,6 +732,7 @@ strptime_internal (buf, format, tm, decided)
/* Match day of month using alternate numeric symbols. */
get_alt_number (1, 31);
tm->tm_mday = val;
+ want_xday = 1;
break;
case 'H':
/* Match hour in 24-hour clock using alternate numeric
@@ -691,6 +752,7 @@ strptime_internal (buf, format, tm, decided)
/* Match month using alternate numeric symbols. */
get_alt_number (1, 12);
tm->tm_mon = val - 1;
+ want_xday = 1;
break;
case 'M':
/* Match minutes using alternate numeric symbols. */
@@ -713,11 +775,13 @@ strptime_internal (buf, format, tm, decided)
/* Match number of weekday using alternate numeric symbols. */
get_alt_number (0, 6);
tm->tm_wday = val;
+ have_wday = 1;
break;
case 'y':
/* Match year within century using alternate numeric symbols. */
get_alt_number (0, 99);
tm->tm_year = val >= 69 ? val : val + 100;
+ want_xday = 1;
break;
default:
return NULL;
@@ -734,6 +798,11 @@ strptime_internal (buf, format, tm, decided)
if (want_century && century != -1)
tm->tm_year = tm->tm_year % 100 + (century - 19) * 100;
+ if (want_xday && !have_wday)
+ day_of_the_week (tm);
+ if (want_xday && !have_yday)
+ day_of_the_year (tm);
+
return (char *) rp;
}