-
/*
- * dtime.c -- time/date routines
- *
- * This code is Copyright (c) 2002, by the authors of nmh. See the
- * COPYRIGHT file in the root directory of the nmh distribution for
- * complete copyright information.
- */
-
+** dtime.c -- time/date routines
+**
+** This code is Copyright (c) 2002, by the authors of nmh. See the
+** COPYRIGHT file in the root directory of the nmh distribution for
+** complete copyright information.
+*/
+
+#include <time.h>
#include <h/mh.h> /* for snprintf() */
-#include <h/nmh.h>
#include <h/tws.h>
-#if !defined(HAVE_STRUCT_TM_TM_GMTOFF) && !defined(HAVE_TZSET)
-# include <sys/timeb.h>
-#endif
-
-#ifdef TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#if !defined(HAVE_STRUCT_TM_TM_GMTOFF) && defined(HAVE_TZSET)
-extern int daylight;
+#if !defined(HAVE_STRUCT_TM_TM_GMTOFF)
extern long timezone;
-extern char *tzname[];
-#endif
-
-#ifndef abs
-# define abs(a) (a >= 0 ? a : -a)
#endif
/*
- * The number of days in the year, accounting for leap years
- */
-#define dysize(y) \
+** The number of days in the year, accounting for leap years
+*/
+#define dysize(y) \
(((y) % 4) ? 365 : (((y) % 100) ? 366 : (((y) % 400) ? 365 : 366)))
char *tw_moty[] = {
- "Jan", "Feb", "Mar", "Apr",
- "May", "Jun", "Jul", "Aug",
- "Sep", "Oct", "Nov", "Dec",
- NULL
+ "Jan", "Feb", "Mar", "Apr",
+ "May", "Jun", "Jul", "Aug",
+ "Sep", "Oct", "Nov", "Dec",
+ NULL
};
char *tw_dotw[] = {
- "Sun", "Mon", "Tue",
- "Wed", "Thu", "Fri",
- "Sat", NULL
+ "Sun", "Mon", "Tue",
+ "Wed", "Thu", "Fri",
+ "Sat", NULL
};
char *tw_ldotw[] = {
- "Sunday", "Monday", "Tuesday",
- "Wednesday", "Thursday", "Friday",
- "Saturday", NULL
-};
-
-struct zone {
- char *std;
- char *dst;
- int shift;
-};
-
-static struct zone zones[] = {
- { "GMT", "BST", 0 },
- { "EST", "EDT", -5 },
- { "CST", "CDT", -6 },
- { "MST", "MDT", -7 },
- { "PST", "PDT", -8 },
-#if 0
-/* RFC1123 specifies do not use military TZs */
- { "A", NULL, -1 },
- { "B", NULL, -2 },
- { "C", NULL, -3 },
- { "D", NULL, -4 },
- { "E", NULL, -5 },
- { "F", NULL, -6 },
- { "G", NULL, -7 },
- { "H", NULL, -8 },
- { "I", NULL, -9 },
- { "K", NULL, -10 },
- { "L", NULL, -11 },
- { "M", NULL, -12 },
- { "N", NULL, 1 },
-#ifndef HUJI
- { "O", NULL, 2 },
-#else
- { "JST", "JDT", 2 },
-#endif
- { "P", NULL, 3 },
- { "Q", NULL, 4 },
- { "R", NULL, 5 },
- { "S", NULL, 6 },
- { "T", NULL, 7 },
- { "U", NULL, 8 },
- { "V", NULL, 9 },
- { "W", NULL, 10 },
- { "X", NULL, 11 },
- { "Y", NULL, 12 },
-#endif
- { NULL, NULL, 0 }
+ "Sunday", "Monday", "Tuesday",
+ "Wednesday", "Thursday", "Friday",
+ "Saturday", NULL
};
static int dmsize[] = {
- 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
/*
- * Get current time (adjusted for local time
- * zone and daylight savings time) expressed
- * as nmh "broken-down" time structure.
- */
+** Get current time (adjusted for local time
+** zone and daylight savings time) expressed
+** as nmh "broken-down" time structure.
+*/
struct tws *
-dlocaltimenow (void)
+dlocaltimenow(void)
{
- time_t clock;
+ time_t clock;
- time (&clock);
- return dlocaltime (&clock);
+ time(&clock);
+ return dlocaltime(&clock);
}
/*
- * Take clock value and return pointer to nmh time structure
- * containing "broken-down" time. The time is adjusted for
- * local time zone and daylight savings time.
- */
+** Take clock value and return pointer to nmh time structure
+** containing "broken-down" time. The time is adjusted for
+** local time zone and daylight savings time.
+*/
struct tws *
-dlocaltime (time_t *clock)
+dlocaltime(time_t *clock)
{
- static struct tws tw;
- struct tm *tm;
+ static struct tws tw;
+ struct tm *tm;
-#if !defined(HAVE_STRUCT_TM_TM_GMTOFF) && !defined(HAVE_TZSET)
- struct timeb tb;
-#endif
+ if (!clock)
+ return NULL;
- if (!clock)
- return NULL;
+ tm = localtime(clock);
- tm = localtime (clock);
+ tw.tw_sec = tm->tm_sec;
+ tw.tw_min = tm->tm_min;
+ tw.tw_hour = tm->tm_hour;
+ tw.tw_mday = tm->tm_mday;
+ tw.tw_mon = tm->tm_mon;
- tw.tw_sec = tm->tm_sec;
- tw.tw_min = tm->tm_min;
- tw.tw_hour = tm->tm_hour;
- tw.tw_mday = tm->tm_mday;
- tw.tw_mon = tm->tm_mon;
+ /* tm_year is always "year - 1900". So we correct for this. */
+ tw.tw_year = tm->tm_year + 1900;
+ tw.tw_wday = tm->tm_wday;
+ tw.tw_yday = tm->tm_yday;
- /*
- * tm_year is always "year - 1900".
- * So we correct for this.
- */
- tw.tw_year = tm->tm_year + 1900;
- tw.tw_wday = tm->tm_wday;
- tw.tw_yday = tm->tm_yday;
-
- tw.tw_flags = TW_NULL;
- if (tm->tm_isdst)
- tw.tw_flags |= TW_DST;
+ tw.tw_flags = TW_NULL;
+ if (tm->tm_isdst)
+ tw.tw_flags |= TW_DST;
#ifdef HAVE_STRUCT_TM_TM_GMTOFF
- tw.tw_zone = tm->tm_gmtoff / 60;
- if (tm->tm_isdst) /* if DST is in effect */
- tw.tw_zone -= 60; /* reset to normal offset */
+ tw.tw_zone = tm->tm_gmtoff / 60;
+ if (tm->tm_isdst) /* if DST is in effect */
+ tw.tw_zone -= 60; /* reset to normal offset */
#else
-# ifdef HAVE_TZSET
- tzset();
- tw.tw_zone = -(timezone / 60);
-# else
- ftime (&tb);
- tw.tw_zone = -tb.timezone;
-# endif
+ tzset();
+ tw.tw_zone = -(timezone / 60);
#endif
- tw.tw_flags &= ~TW_SDAY;
- tw.tw_flags |= TW_SEXP;
- tw.tw_flags &= ~TW_SZONE;
- tw.tw_flags |= TW_SZEXP;
+ tw.tw_flags &= ~TW_SDAY;
+ tw.tw_flags |= TW_SEXP;
+ tw.tw_flags &= ~TW_SZONE;
+ tw.tw_flags |= TW_SZEXP;
- tw.tw_clock = *clock;
+ tw.tw_clock = *clock;
- return (&tw);
+ return (&tw);
}
/*
- * Take clock value and return pointer to nmh time
- * structure containing "broken-down" time. Time is
- * expressed in UTC (Coordinated Universal Time).
- */
+** Take clock value and return pointer to nmh time
+** structure containing "broken-down" time. Time is
+** expressed in UTC (Coordinated Universal Time).
+*/
struct tws *
-dgmtime (time_t *clock)
+dgmtime(time_t *clock)
{
- static struct tws tw;
- struct tm *tm;
+ static struct tws tw;
+ struct tm *tm;
- if (!clock)
- return NULL;
+ if (!clock)
+ return NULL;
- tm = gmtime (clock);
+ tm = gmtime(clock);
- tw.tw_sec = tm->tm_sec;
- tw.tw_min = tm->tm_min;
- tw.tw_hour = tm->tm_hour;
- tw.tw_mday = tm->tm_mday;
- tw.tw_mon = tm->tm_mon;
+ tw.tw_sec = tm->tm_sec;
+ tw.tw_min = tm->tm_min;
+ tw.tw_hour = tm->tm_hour;
+ tw.tw_mday = tm->tm_mday;
+ tw.tw_mon = tm->tm_mon;
- /*
- * tm_year is always "year - 1900"
- * So we correct for this.
- */
- tw.tw_year = tm->tm_year + 1900;
- tw.tw_wday = tm->tm_wday;
- tw.tw_yday = tm->tm_yday;
+ /* tm_year is always "year - 1900". So we correct for this. */
+ tw.tw_year = tm->tm_year + 1900;
+ tw.tw_wday = tm->tm_wday;
+ tw.tw_yday = tm->tm_yday;
- tw.tw_flags = TW_NULL;
- if (tm->tm_isdst)
- tw.tw_flags |= TW_DST;
+ tw.tw_flags = TW_NULL;
+ if (tm->tm_isdst)
+ tw.tw_flags |= TW_DST;
- tw.tw_zone = 0;
+ tw.tw_zone = 0;
- tw.tw_flags &= ~TW_SDAY;
- tw.tw_flags |= TW_SEXP;
- tw.tw_flags &= ~TW_SZONE;
- tw.tw_flags |= TW_SZEXP;
+ tw.tw_flags &= ~TW_SDAY;
+ tw.tw_flags |= TW_SEXP;
+ tw.tw_flags &= ~TW_SZONE;
+ tw.tw_flags |= TW_SZEXP;
- tw.tw_clock = *clock;
+ tw.tw_clock = *clock;
- return (&tw);
+ return (&tw);
}
/*
- * Using a nmh "broken-down" time structure,
- * produce a 26-byte date/time string, such as
- *
- * Tue Jan 14 17:49:03 1992\n\0
- */
+** Using a nmh "broken-down" time structure,
+** produce a 26-byte date/time string, such as
+**
+** Tue Jan 14 17:49:03 1992\n\0
+*/
char *
-dctime (struct tws *tw)
+dctime(struct tws *tw)
{
- static char buffer[26];
+ static char buffer[26];
- if (!tw)
- return NULL;
+ if (!tw)
+ return NULL;
- snprintf (buffer, sizeof(buffer), "%.3s %.3s %02d %02d:%02d:%02d %.4d\n",
- tw_dotw[tw->tw_wday], tw_moty[tw->tw_mon], tw->tw_mday,
- tw->tw_hour, tw->tw_min, tw->tw_sec,
- tw->tw_year < 100 ? tw->tw_year + 1900 : tw->tw_year);
+ snprintf(buffer, sizeof(buffer), "%.3s %.3s %02d %02d:%02d:%02d %.4d\n",
+ tw_dotw[tw->tw_wday], tw_moty[tw->tw_mon], tw->tw_mday,
+ tw->tw_hour, tw->tw_min, tw->tw_sec,
+ tw->tw_year < 100 ? tw->tw_year + 1900 : tw->tw_year);
- return buffer;
+ return buffer;
}
/*
- * Produce a date/time string of the form
- *
- * Mon, 16 Jun 1992 15:30:48 -700 (or)
- * Mon, 16 Jun 1992 15:30:48 EDT
- *
- * for the current time, as specified by rfc822.
- * The first form is required by rfc1123.
- */
-
+** Produce a date/time string of the form
+**
+** Mon, 16 Jun 1992 15:30:48 -0700
+**
+** for the current time, as specified by rfc822 and rfc1123.
+*/
char *
-dtimenow (int alpha_timezone)
+dtimenow(void)
{
- time_t clock;
+ time_t clock;
- time (&clock);
- return dtime (&clock, alpha_timezone);
+ time(&clock);
+ return dtime(&clock);
}
/*
- * Using a local calendar time value, produce
- * a date/time string of the form
- *
- * Mon, 16 Jun 1992 15:30:48 -700 (or)
- * Mon, 16 Jun 1992 15:30:48 EDT
- *
- * as specified by rfc822. The first form is required
- * by rfc1123 for outgoing messages.
- */
-
+** Using a local calendar time value, produce
+** a date/time string of the form
+**
+** Mon, 16 Jun 1992 15:30:48 -0700
+**
+** as specified by rfc822 and rfc1123.
+*/
char *
-dtime (time_t *clock, int alpha_timezone)
+dtime(time_t *clock)
{
- if (alpha_timezone)
- /* use alpha-numeric timezones */
- return dasctime (dlocaltime (clock), TW_NULL);
- else
- /* use numeric timezones */
- return dasctime (dlocaltime (clock), TW_ZONE);
+ return dasctime(dlocaltime(clock));
}
/*
- * Using a nmh "broken-down" time structure, produce
- * a date/time string of the form
- *
- * Mon, 16 Jun 1992 15:30:48 -0700
- *
- * as specified by rfc822 and rfc1123.
- */
-
+** Using a nmh "broken-down" time structure, produce
+** a date/time string of the form
+**
+** Mon, 16 Jun 1992 15:30:48 -0700
+**
+** as specified by rfc822 and rfc1123.
+*/
char *
-dasctime (struct tws *tw, int flags)
+dasctime(struct tws *tw)
{
- char buffer[80];
- static char result[80];
-
- if (!tw)
- return NULL;
-
- /* Display timezone if known */
- if ((tw->tw_flags & TW_SZONE) == TW_SZNIL)
- result[0] = '\0';
- else
- snprintf(result, sizeof(result), " %s", dtimezone(tw->tw_zone, tw->tw_flags | flags));
-
- snprintf(buffer, sizeof(buffer), "%02d %s %0*d %02d:%02d:%02d%s",
- tw->tw_mday, tw_moty[tw->tw_mon],
- tw->tw_year < 100 ? 2 : 4, tw->tw_year,
- tw->tw_hour, tw->tw_min, tw->tw_sec, result);
-
- if ((tw->tw_flags & TW_SDAY) == TW_SEXP)
- snprintf (result, sizeof(result), "%s, %s", tw_dotw[tw->tw_wday], buffer);
- else
- if ((tw->tw_flags & TW_SDAY) == TW_SNIL)
- strncpy (result, buffer, sizeof(result));
+ char buffer[80];
+ static char result[80];
+
+ if (!tw)
+ return NULL;
+
+ /* Display timezone if known */
+ if ((tw->tw_flags & TW_SZONE) == TW_SZNIL)
+ result[0] = '\0';
+ else
+ snprintf(result, sizeof(result), " %s", dtimezone(tw->tw_zone, tw->tw_flags));
+
+ snprintf(buffer, sizeof(buffer), "%02d %s %0*d %02d:%02d:%02d%s",
+ tw->tw_mday, tw_moty[tw->tw_mon],
+ tw->tw_year < 100 ? 2 : 4, tw->tw_year,
+ tw->tw_hour, tw->tw_min, tw->tw_sec, result);
+
+ if ((tw->tw_flags & TW_SDAY) == TW_SEXP)
+ snprintf(result, sizeof(result), "%s, %s", tw_dotw[tw->tw_wday], buffer);
else
- snprintf (result, sizeof(result), "%s (%s)", buffer, tw_dotw[tw->tw_wday]);
+ if ((tw->tw_flags & TW_SDAY) == TW_SNIL)
+ strncpy(result, buffer, sizeof(result));
+ else
+ snprintf(result, sizeof(result), "%s (%s)", buffer, tw_dotw[tw->tw_wday]);
- return result;
+ return result;
}
/*
- * Get the timezone for given offset
- */
-
+** Get the timezone for given offset as numeric value.
+*/
char *
-dtimezone (int offset, int flags)
+dtimezone(int offset, int flags)
{
- int hours, mins;
- struct zone *z;
- static char buffer[10];
-
- if (offset < 0) {
- mins = -((-offset) % 60);
- hours = -((-offset) / 60);
- } else {
- mins = offset % 60;
- hours = offset / 60;
- }
-
- if (!(flags & TW_ZONE) && mins == 0) {
-#if defined(HAVE_TZSET) && defined(HAVE_TZNAME)
- tzset();
- return ((flags & TW_DST) ? tzname[1] : tzname[0]);
-#else
- for (z = zones; z->std; z++)
- if (z->shift == hours)
- return (z->dst && (flags & TW_DST) ? z->dst : z->std);
-#endif
- }
+ int hours, mins;
+ static char buffer[10];
+
+ if (offset < 0) {
+ mins = -((-offset) % 60);
+ hours = -((-offset) / 60);
+ } else {
+ mins = offset % 60;
+ hours = offset / 60;
+ }
#ifdef ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST
- if (flags & TW_DST)
- hours += 1;
+ if (flags & TW_DST)
+ hours += 1;
#endif /* ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST */
- snprintf (buffer, sizeof(buffer), "%s%02d%02d",
- offset < 0 ? "-" : "+", abs (hours), abs (mins));
- return buffer;
+ snprintf(buffer, sizeof(buffer), "%s%02d%02d",
+ offset < 0 ? "-" : "+", abs(hours), abs(mins));
+ return buffer;
}
/*
- * Convert nmh time structure for local "broken-down"
- * time to calendar time (clock value). This routine
- * is based on the gtime() routine written by Steven Shafer
- * at CMU. It was forwarded to MTR by Jay Lepreau at Utah-CS.
- */
+** Convert nmh time structure for local "broken-down"
+** time to calendar time (clock value). This routine
+** is based on the gtime() routine written by Steven Shafer
+** at CMU. It was forwarded to MTR by Jay Lepreau at Utah-CS.
+*/
time_t
-dmktime (struct tws *tw)
+dmktime(struct tws *tw)
{
- int i, sec, min, hour, mday, mon, year;
- time_t result;
-
- if (tw->tw_clock != 0)
- return tw->tw_clock;
-
- if ((sec = tw->tw_sec) < 0 || sec > 61
- || (min = tw->tw_min) < 0 || min > 59
- || (hour = tw->tw_hour) < 0 || hour > 23
- || (mday = tw->tw_mday) < 1 || mday > 31
- || (mon = tw->tw_mon + 1) < 1 || mon > 12)
- return (tw->tw_clock = (time_t) -1);
-
- year = tw->tw_year;
-
- result = 0;
- if (year < 1970)
- year += 1900;
-
- if (year < 1970)
- year += 100;
-
- for (i = 1970; i < year; i++)
- result += dysize (i);
- if (dysize (year) == 366 && mon >= 3)
- result++;
- while (--mon)
- result += dmsize[mon - 1];
- result += mday - 1;
- result = 24 * result + hour;
- result = 60 * result + min;
- result = 60 * result + sec;
- result -= 60 * tw->tw_zone;
- if (tw->tw_flags & TW_DST)
- result -= 60 * 60;
-
- return (tw->tw_clock = result);
+ int i, sec, min, hour, mday, mon, year;
+ time_t result;
+
+ if (tw->tw_clock != 0)
+ return tw->tw_clock;
+
+ if ((sec = tw->tw_sec) < 0 || sec > 61
+ || (min = tw->tw_min) < 0 || min > 59
+ || (hour = tw->tw_hour) < 0 || hour > 23
+ || (mday = tw->tw_mday) < 1 || mday > 31
+ || (mon = tw->tw_mon + 1) < 1 || mon > 12)
+ return (tw->tw_clock = (time_t) -1);
+
+ year = tw->tw_year;
+
+ result = 0;
+ if (year < 1970)
+ year += 1900;
+
+ if (year < 1970)
+ year += 100;
+
+ for (i = 1970; i < year; i++)
+ result += dysize(i);
+ if (dysize(year) == 366 && mon >= 3)
+ result++;
+ while (--mon)
+ result += dmsize[mon - 1];
+ result += mday - 1;
+ result = 24 * result + hour;
+ result = 60 * result + min;
+ result = 60 * result + sec;
+ result -= 60 * tw->tw_zone;
+ if (tw->tw_flags & TW_DST)
+ result -= 60 * 60;
+
+ return (tw->tw_clock = result);
}
/*
- * Simple calculation of day of the week. Algorithm
- * used is Zeller's congruence. We assume that
- * if tw->tw_year < 100, then the century = 19.
- */
+** Simple calculation of day of the week. Algorithm
+** used is Zeller's congruence. We assume that
+** if tw->tw_year < 100, then the century = 19.
+*/
void
-set_dotw (struct tws *tw)
+set_dotw(struct tws *tw)
{
- int month, day, year, century;
-
- month = tw->tw_mon - 1;
- day = tw->tw_mday;
- year = tw->tw_year % 100;
- century = tw->tw_year < 100 ? 19 : tw->tw_year / 100;
-
- if (month <= 0) {
- month += 12;
- if (--year < 0) {
- year += 100;
- century--;
+ int month, day, year, century;
+
+ month = tw->tw_mon - 1;
+ day = tw->tw_mday;
+ year = tw->tw_year % 100;
+ century = tw->tw_year < 100 ? 19 : tw->tw_year / 100;
+
+ if (month <= 0) {
+ month += 12;
+ if (--year < 0) {
+ year += 100;
+ century--;
+ }
}
- }
- tw->tw_wday =
- ((26 * month - 2) / 10 + day + year + year / 4
- - 3 * century / 4 + 1) % 7;
- if (tw->tw_wday < 0)
- tw->tw_wday += 7;
+ tw->tw_wday = ((26 * month - 2) / 10 + day + year + year / 4
+ - 3 * century / 4 + 1) % 7;
+ if (tw->tw_wday < 0)
+ tw->tw_wday += 7;
- tw->tw_flags &= ~TW_SDAY, tw->tw_flags |= TW_SIMP;
+ tw->tw_flags &= ~TW_SDAY, tw->tw_flags |= TW_SIMP;
}
/*
- * Copy nmh time structure
- */
+** Copy nmh time structure
+*/
void
-twscopy (struct tws *tb, struct tws *tw)
+twscopy(struct tws *tb, struct tws *tw)
{
- *tb = *tw; /* struct copy */
-
-#if 0
- tb->tw_sec = tw->tw_sec;
- tb->tw_min = tw->tw_min;
- tb->tw_hour = tw->tw_hour;
- tb->tw_mday = tw->tw_mday;
- tb->tw_mon = tw->tw_mon;
- tb->tw_year = tw->tw_year;
- tb->tw_wday = tw->tw_wday;
- tb->tw_yday = tw->tw_yday;
- tb->tw_zone = tw->tw_zone;
- tb->tw_clock = tw->tw_clock;
- tb->tw_flags = tw->tw_flags;
-#endif
+ *tb = *tw; /* struct copy */
}
/*
- * Compare two nmh time structures
- */
+** Compare two nmh time structures
+*/
int
-twsort (struct tws *tw1, struct tws *tw2)
+twsort(struct tws *tw1, struct tws *tw2)
{
- time_t c1, c2;
+ time_t c1, c2;
- if (tw1->tw_clock == 0)
- dmktime (tw1);
- if (tw2->tw_clock == 0)
- dmktime (tw2);
+ if (tw1->tw_clock == 0)
+ dmktime(tw1);
+ if (tw2->tw_clock == 0)
+ dmktime(tw2);
- return ((c1 = tw1->tw_clock) > (c2 = tw2->tw_clock) ? 1
- : c1 == c2 ? 0 : -1);
+ return ((c1 = tw1->tw_clock) > (c2 = tw2->tw_clock) ? 1
+ : c1 == c2 ? 0 : -1);
}
projects / mmh / blobdiff