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0001-Add-caldate-and-caltime.patch
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0001-Add-caldate-and-caltime.patch
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From 5fc15bafb98b16811f050c6f293140f65867acc8 Mon Sep 17 00:00:00 2001
From: Oliver Ripka <code@bockcay.de>
Date: Fri, 9 Jul 2010 17:06:21 +0100
Subject: [PATCH 1/3] Add caldate and caltime
---
GNUmakefile | 13 ++++--
cal/caldate.0 | 36 ++++++++++++++++
cal/caldate.3 | 54 +++++++++++++++++++++++++
cal/caldate_fmjd.c | 48 ++++++++++++++++++++++
cal/caldate_fmt.c | 25 +++++++++++
cal/caldate_mjd.0 | 72 +++++++++++++++++++++++++++++++++
cal/caldate_mjd.3 | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
cal/caldate_mjd.c | 44 ++++++++++++++++++++
cal/caldate_norm.c | 7 +++
cal/caldate_scan.c | 25 +++++++++++
cal/caldate_ster.c | 24 +++++++++++
cal/caltime.0 | 44 ++++++++++++++++++++
cal/caltime.3 | 82 +++++++++++++++++++++++++++++++++++++
cal/caltime_fmt.c | 45 +++++++++++++++++++++
cal/caltime_scan.c | 40 ++++++++++++++++++
cal/caltime_tai.0 | 43 ++++++++++++++++++++
cal/caltime_tai.3 | 61 ++++++++++++++++++++++++++++
cal/caltime_tai.c | 25 +++++++++++
cal/caltime_utc.c | 35 ++++++++++++++++
cal/leapsecs.c | 28 +++++++++++++
cal/leapsecs_add.c | 26 ++++++++++++
cal/leapsecs_init.c | 11 +++++
cal/leapsecs_read.c | 50 +++++++++++++++++++++++
cal/leapsecs_sub.c | 29 +++++++++++++
caldate.h | 19 +++++++++
caltime.h | 20 +++++++++
leapsecs.h | 10 +++++
27 files changed, 1022 insertions(+), 5 deletions(-)
create mode 100644 cal/caldate.0
create mode 100644 cal/caldate.3
create mode 100644 cal/caldate_fmjd.c
create mode 100644 cal/caldate_fmt.c
create mode 100644 cal/caldate_mjd.0
create mode 100644 cal/caldate_mjd.3
create mode 100644 cal/caldate_mjd.c
create mode 100644 cal/caldate_norm.c
create mode 100644 cal/caldate_scan.c
create mode 100644 cal/caldate_ster.c
create mode 100644 cal/caltime.0
create mode 100644 cal/caltime.3
create mode 100644 cal/caltime_fmt.c
create mode 100644 cal/caltime_scan.c
create mode 100644 cal/caltime_tai.0
create mode 100644 cal/caltime_tai.3
create mode 100644 cal/caltime_tai.c
create mode 100644 cal/caltime_utc.c
create mode 100644 cal/leapsecs.c
create mode 100644 cal/leapsecs_add.c
create mode 100644 cal/leapsecs_init.c
create mode 100644 cal/leapsecs_read.c
create mode 100644 cal/leapsecs_sub.c
create mode 100644 caldate.h
create mode 100644 caltime.h
create mode 100644 leapsecs.h
diff --git a/GNUmakefile b/GNUmakefile
index da2462f..2f8cd14 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -11,9 +11,9 @@ MAN3DIR=${prefix}/man/man3
LIBS=byte.a fmt.a scan.a str.a uint.a open.a stralloc.a unix.a socket.a \
buffer.a mmap.a taia.a tai.a dns.a case.a mult.a array.a io.a \
-textcode.a cdb.a
+textcode.a cdb.a cal.a
-all: $(LIBS) libowfat.a libsocket t
+all: $(LIBS) libowfat.a libsocket t
CROSS=
#CROSS=i686-mingw-
@@ -54,7 +54,7 @@ endif
# to build without diet libc support, use $ make DIET=
# see http://www.fefe.de/dietlibc/ for details about the diet libc
-VPATH=str:byte:fmt:scan:uint:open:stralloc:unix:socket:buffer:mmap:textcode:taia:tai:dns:case:array:mult:io:cdb
+VPATH=str:byte:fmt:scan:uint:open:stralloc:unix:socket:buffer:mmap:textcode:taia:tai:cal:dns:case:array:mult:io:cdb
BYTE_OBJS=$(patsubst byte/%.c,%.o,$(wildcard byte/*.c))
FMT_OBJS=$(patsubst fmt/%.c,%.o,$(wildcard fmt/*.c))
@@ -70,6 +70,7 @@ MMAP_OBJS=$(patsubst mmap/%.c,%.o,$(wildcard mmap/*.c))
TEXTCODE_OBJS=$(patsubst textcode/%.c,%.o,$(wildcard textcode/*.c))
TAI_OBJS=$(patsubst tai/%.c,%.o,$(wildcard tai/*.c))
TAIA_OBJS=$(patsubst taia/%.c,%.o,$(wildcard taia/*.c))
+CAL_OBJS=$(patsubst cal/%.c,%.o,$(wildcard cal/*.c))
DNS_OBJS=$(patsubst dns/%.c,%.o,$(wildcard dns/*.c))
CASE_OBJS=$(patsubst case/%.c,%.o,$(wildcard case/*.c))
ARRAY_OBJS=$(patsubst array/%.c,%.o,$(wildcard array/*.c))
@@ -89,6 +90,7 @@ $(MMAP_OBJS): mmap.h open.h
$(TEXTCODE_OBJS): textcode.h
$(TAI_OBJS): tai.h uint64.h
$(TAIA_OBJS): taia.h tai.h uint64.h
+$(CAL_OBJS): leapsecs.h caldate.h caltime.h taia.h tai.h uint64.h
$(DNS_OBJS): dns.h stralloc.h taia.h tai.h uint64.h iopause.h
$(CASE_OBJS): case.h
$(ARRAY_OBJS): uint64.h array.h
@@ -121,6 +123,7 @@ mmap.a: $(MMAP_OBJS)
textcode.a: $(TEXTCODE_OBJS)
taia.a: $(TAIA_OBJS)
tai.a: $(TAI_OBJS)
+cal.a: $(CAL_OBJS)
dns.a: $(DNS_OBJS)
case.a: $(CASE_OBJS)
array.a: $(ARRAY_OBJS)
@@ -132,7 +135,7 @@ ALL_OBJS=$(DNS_OBJS) $(BYTE_OBJS) $(FMT_OBJS) $(SCAN_OBJS) \
$(STR_OBJS) $(UINT_OBJS) $(OPEN_OBJS) $(STRALLOC_OBJS) $(UNIX_OBJS) \
$(SOCKET_OBJS) $(BUFFER_OBJS) $(MMAP_OBJS) $(TEXTCODE_OBJS) \
$(TAIA_OBJS) $(TAI_OBJS) $(CASE_OBJS) $(ARRAY_OBJS) $(MULT_OBJS) \
-$(IO_OBJS) $(CDB_OBJS)
+$(IO_OBJS) $(CDB_OBJS) $(CAL_OBJS)
libowfat.a: $(ALL_OBJS)
$(CROSS)ar cr $@ $(ALL_OBJS)
@@ -164,7 +167,7 @@ libepoll havesigio.h havebsdsf.h havesendfile.h havescope.h havedevpoll.h \
dep libsocket havealloca.h
INCLUDES=buffer.h byte.h fmt.h ip4.h ip6.h mmap.h scan.h socket.h str.h stralloc.h \
-uint16.h uint32.h uint64.h open.h textcode.h tai.h taia.h dns.h iopause.h case.h \
+uint16.h uint32.h uint64.h open.h textcode.h caldate.h caltime.h leapsecs.h tai.h taia.h dns.h iopause.h case.h \
openreadclose.h readclose.h ndelay.h array.h io.h safemult.h iob.h havealloca.h \
errmsg.h cdb.h cdb_make.h rangecheck.h iarray.h
diff --git a/cal/caldate.0 b/cal/caldate.0
new file mode 100644
index 0000000..5477efa
--- /dev/null
+++ b/cal/caldate.0
@@ -0,0 +1,36 @@
+caldate(3) caldate(3)
+
+
+
+NNAAMMEE
+ caldate - calendar dates
+
+SSYYNNTTAAXX
+ ##iinncclluuddee <<ccaallddaattee..hh>>
+
+ unsigned int ccaallddaattee__ffmmtt(_s,&_c_d);
+ unsigned int ccaallddaattee__ssccaann(_s,&_c_d);
+
+ struct caldate _c_d;
+ char *_s;
+
+DDEESSCCRRIIPPTTIIOONN
+ A ssttrruucctt ccaallddaattee value is a calendar date. It has three components:
+ yyeeaarr, mmoonntthh (1...12), and ddaayy (1...31).
+
+ ccaallddaattee__ffmmtt prints _c_d in ISO style (yyyy-mm-dd) into the character buf‐
+ fer _s, without a terminating NUL. It returns the number of characters
+ printed. _s may be zero; then ccaallddaattee__ffmmtt returns the number of charac‐
+ ters that would have been printed.
+
+ ccaallddaattee__ssccaann reads a calendar date in ISO style from the beginning of
+ the character buffer _s and puts it into _c_d. It returns the number of
+ characters read. If _s does not start with an ISO-style date, ccaall‐‐
+ ddaattee__ssccaann returns 0.
+
+SSEEEE AALLSSOO
+ caldate_mjd(3), caltime(3)
+
+
+
+ caldate(3)
diff --git a/cal/caldate.3 b/cal/caldate.3
new file mode 100644
index 0000000..4377376
--- /dev/null
+++ b/cal/caldate.3
@@ -0,0 +1,54 @@
+.TH caldate 3
+.SH NAME
+caldate \- calendar dates
+.SH SYNTAX
+.B #include <caldate.h>
+
+unsigned int \fBcaldate_fmt\fP(\fIs\fR,&\fIcd\fR);
+.br
+unsigned int \fBcaldate_scan\fP(\fIs\fR,&\fIcd\fR);
+
+struct caldate \fIcd\fR;
+.br
+char *\fIs\fR;
+.SH DESCRIPTION
+A
+.B struct caldate
+value is a calendar date.
+It has three components:
+.BR year ,
+.B month
+(1...12),
+and
+.B day
+(1...31).
+
+.B caldate_fmt
+prints
+.I cd
+in ISO style (yyyy-mm-dd)
+into the character buffer
+.IR s ,
+without a terminating NUL.
+It returns the number of characters printed.
+.I s
+may be zero;
+then
+.B caldate_fmt
+returns the number of characters that would have been printed.
+
+.B caldate_scan
+reads a calendar date in ISO style
+from the beginning of the character buffer
+.I s
+and puts it into
+.IR cd .
+It returns the number of characters read.
+If
+.I s
+does not start with an ISO-style date,
+.B caldate_scan
+returns 0.
+.SH "SEE ALSO"
+caldate_mjd(3),
+caltime(3)
diff --git a/cal/caldate_fmjd.c b/cal/caldate_fmjd.c
new file mode 100644
index 0000000..05ff32f
--- /dev/null
+++ b/cal/caldate_fmjd.c
@@ -0,0 +1,48 @@
+#include "caldate.h"
+
+void caldate_frommjd(cd,day,pwday,pyday)
+struct caldate *cd;
+long day;
+int *pwday;
+int *pyday;
+{
+ long year;
+ long month;
+ int yday;
+
+ year = day / 146097L;
+ day %= 146097L;
+ day += 678881L;
+ while (day >= 146097L) { day -= 146097L; ++year; }
+
+ /* year * 146097 + day - 678881 is MJD; 0 <= day < 146097 */
+ /* 2000-03-01, MJD 51604, is year 5, day 0 */
+
+ if (pwday) *pwday = (day + 3) % 7;
+
+ year *= 4;
+ if (day == 146096L) { year += 3; day = 36524L; }
+ else { year += day / 36524L; day %= 36524L; }
+ year *= 25;
+ year += day / 1461;
+ day %= 1461;
+ year *= 4;
+
+ yday = (day < 306);
+ if (day == 1460) { year += 3; day = 365; }
+ else { year += day / 365; day %= 365; }
+ yday += day;
+
+ day *= 10;
+ month = (day + 5) / 306;
+ day = (day + 5) % 306;
+ day /= 10;
+ if (month >= 10) { yday -= 306; ++year; month -= 10; }
+ else { yday += 59; month += 2; }
+
+ cd->year = year;
+ cd->month = month + 1;
+ cd->day = day + 1;
+
+ if (pyday) *pyday = yday;
+}
diff --git a/cal/caldate_fmt.c b/cal/caldate_fmt.c
new file mode 100644
index 0000000..3a21521
--- /dev/null
+++ b/cal/caldate_fmt.c
@@ -0,0 +1,25 @@
+#include "caldate.h"
+
+unsigned int caldate_fmt(s,cd)
+char *s;
+struct caldate *cd;
+{
+ long x;
+ int i = 0;
+
+ x = cd->year; if (x < 0) x = -x; do { ++i; x /= 10; } while(x);
+
+ if (s) {
+ x = cd->year;
+ if (x < 0) { x = -x; *s++ = '-'; }
+ s += i; do { *--s = '0' + (x % 10); x /= 10; } while(x); s += i;
+
+ x = cd->month;
+ s[0] = '-'; s[2] = '0' + (x % 10); x /= 10; s[1] = '0' + (x % 10);
+
+ x = cd->day;
+ s[3] = '-'; s[5] = '0' + (x % 10); x /= 10; s[4] = '0' + (x % 10);
+ }
+
+ return (cd->year < 0) + i + 6;
+}
diff --git a/cal/caldate_mjd.0 b/cal/caldate_mjd.0
new file mode 100644
index 0000000..52ea97c
--- /dev/null
+++ b/cal/caldate_mjd.0
@@ -0,0 +1,72 @@
+caldate_mjd(3) caldate_mjd(3)
+
+
+
+NNAAMMEE
+ caldate_mjd - manipulate calendar dates
+
+SSYYNNTTAAXX
+ ##iinncclluuddee <<ccaallddaattee..hh>>
+
+ void ccaallddaattee__ffrroommmmjjdd(&_c_d,_d_a_y,_w_e_e_k_d_a_y,_y_e_a_r_d_a_y);
+ long ccaallddaattee__mmjjdd(&_c_d);
+ void ccaallddaattee__nnoorrmmaalliizzee(&_c_d);
+
+ void ccaallddaattee__eeaasstteerr(&_c_d);
+
+ struct caldate _c_d;
+ long _d_a_y;
+ int *_w_e_e_k_d_a_y;
+ int *_y_e_a_r_d_a_y;
+
+BBAASSIICC CCOONNVVEERRSSIIOONNSS
+ Every calendar date has a _m_o_d_i_f_i_e_d _J_u_l_i_a_n _d_a_y _n_u_m_b_e_r. The day number
+ increases by 1 every day. Day number 0 is 17 November 1858. Day num‐
+ ber 51604 is 1 March 2000.
+
+ ccaallddaattee__ffrroommmmjjdd puts into _c_d the date corresponding to the modified
+ Julian day number _d_a_y.
+
+ ccaallddaattee__ffrroommmmjjdd also computes the day of the week (0 through 6) and the
+ day of the year (0 through 365). It stores the day of the week in
+ **_w_e_e_k_d_a_y if _w_e_e_k_d_a_y is nonzero. It stores the day of the year in
+ **_y_e_a_r_d_a_y if _y_e_a_r_d_a_y is nonzero.
+
+ ccaallddaattee__mmjjdd returns the modified Julian day number corresponding to the
+ date in _c_d.
+
+ ccaallddaattee__mmjjdd accepts days outside the range 1 to 31, referring to days
+ before the beginning or after the end of the month. It also accepts
+ months outside the range 1 to 12, referring to months before the begin‐
+ ning or after the end of the year.
+
+ ccaallddaattee__nnoorrmmaalliizzee calls ccaallddaattee__ffrroommmmjjdd with the result of ccaallddaattee__mmjjdd.
+ This means that it accepts out-of-range months and out-of-range days in
+ _c_d, and puts a valid calendar date back into _c_d.
+
+OOTTHHEERR FFUUNNCCTTIIOONNSS
+ ccaallddaattee__eeaasstteerr reads the year from _c_d and then changes _c_d to the date
+ of Easter in the same year.
+
+LLIIMMIITTAATTIIOONNSS
+ The ccaallddaattee routines currently support the Gregorian calendar, which
+ was defined in 1582 and adopted at different times in different coun‐
+ tries. For earlier dates the ccaallddaattee routines work with ``virtual Gre‐
+ gorian,'' defined mathematically by the 400-year Gregorian cycle for
+ years before 1582. The Julian calendar is not supported.
+
+ The Gregorian calendar will be replaced by a new calendar within a few
+ thousand years. The ccaallddaattee__ffrroommmmjjdd and ccaallddaattee__mmjjdd routines will be
+ upgraded accordingly. The current ccaallddaattee__ffrroommmmjjdd and ccaallddaattee__mmjjdd rou‐
+ tines are not useful for dates far in the future.
+
+ Day numbers will overflow a 32-bit lloonngg sometime after the year
+ 5000000; all systems should upgrade to 64-bit lloonnggs before then. ccaall‐‐
+ ddaattee__mmjjdd does not check for overflow.
+
+SSEEEE AALLSSOO
+ caldate(3)
+
+
+
+ caldate_mjd(3)
diff --git a/cal/caldate_mjd.3 b/cal/caldate_mjd.3
new file mode 100644
index 0000000..4e6a424
--- /dev/null
+++ b/cal/caldate_mjd.3
@@ -0,0 +1,111 @@
+.TH caldate_mjd 3
+.SH NAME
+caldate_mjd \- manipulate calendar dates
+.SH SYNTAX
+.B #include <caldate.h>
+
+void \fBcaldate_frommjd\fP(&\fIcd\fR,\fIday\fR,\fIweekday\fR,\fIyearday\fR);
+.br
+long \fBcaldate_mjd\fP(&\fIcd\fR);
+.br
+void \fBcaldate_normalize\fP(&\fIcd\fR);
+
+void \fBcaldate_easter\fP(&\fIcd\fR);
+
+struct caldate \fIcd\fR;
+.br
+long \fIday\fR;
+.br
+int *\fIweekday\fR;
+.br
+int *\fIyearday\fR;
+.SH "BASIC CONVERSIONS"
+Every calendar date has a
+.I modified Julian day number\fR.
+The day number increases by 1 every day.
+Day number 0 is 17 November 1858.
+Day number 51604 is 1 March 2000.
+
+.B caldate_frommjd
+puts into
+.I cd
+the date corresponding to the modified Julian day number
+.IR day .
+
+.B caldate_frommjd
+also computes the day of the week (0 through 6)
+and the day of the year (0 through 365).
+It stores the day of the week in
+.B *\fIweekday
+if
+.I weekday
+is nonzero.
+It stores the day of the year in
+.B *\fIyearday
+if
+.I yearday
+is nonzero.
+
+.B caldate_mjd
+returns the modified Julian day number corresponding to the date in
+.IR cd .
+
+.B caldate_mjd
+accepts days outside the range 1 to 31,
+referring to days before the beginning or after the end of the month.
+It also accepts months outside the range 1 to 12,
+referring to months before the beginning or after the end of the year.
+
+.B caldate_normalize
+calls
+.B caldate_frommjd
+with the result of
+.BR caldate_mjd .
+This means that it accepts out-of-range months and out-of-range days in
+.IR cd ,
+and puts a valid calendar date back into
+.IR cd .
+.SH "OTHER FUNCTIONS"
+.B caldate_easter
+reads the year from
+.I cd
+and then changes
+.I cd
+to the date of Easter in the same year.
+.SH LIMITATIONS
+The
+.B caldate
+routines currently support the Gregorian calendar,
+which was defined in 1582 and adopted at different times
+in different countries.
+For earlier dates the
+.B caldate
+routines work with
+``virtual Gregorian,''
+defined mathematically by the 400-year Gregorian cycle
+for years before 1582.
+The Julian calendar is not supported.
+
+The Gregorian calendar will be replaced by a new calendar
+within a few thousand years.
+The
+.B caldate_frommjd
+and
+.B caldate_mjd
+routines will be upgraded accordingly.
+The current
+.B caldate_frommjd
+and
+.B caldate_mjd
+routines are not useful for dates far in the future.
+
+Day numbers will overflow a 32-bit
+.B long
+sometime after the year 5000000;
+all systems should upgrade to 64-bit
+.BR long s
+before then.
+.B caldate_mjd
+does not check for overflow.
+.SH "SEE ALSO"
+caldate(3)
diff --git a/cal/caldate_mjd.c b/cal/caldate_mjd.c
new file mode 100644
index 0000000..85f2a1b
--- /dev/null
+++ b/cal/caldate_mjd.c
@@ -0,0 +1,44 @@
+#include "caldate.h"
+
+static unsigned long times365[4] = { 0, 365, 730, 1095 } ;
+static unsigned long times36524[4] = { 0, 36524UL, 73048UL, 109572UL } ;
+static unsigned long montab[12] =
+{ 0, 31, 61, 92, 122, 153, 184, 214, 245, 275, 306, 337 } ;
+/* month length after february is (306 * m + 5) / 10 */
+
+long caldate_mjd(cd)
+struct caldate *cd;
+{
+ long y;
+ long m;
+ long d;
+
+ d = cd->day - 678882L;
+ m = cd->month - 1;
+ y = cd->year;
+
+ d += 146097L * (y / 400);
+ y %= 400;
+
+ if (m >= 2) m -= 2; else { m += 10; --y; }
+
+ y += (m / 12);
+ m %= 12;
+ if (m < 0) { m += 12; --y; }
+
+ d += montab[m];
+
+ d += 146097L * (y / 400);
+ y %= 400;
+ if (y < 0) { y += 400; d -= 146097L; }
+
+ d += times365[y & 3];
+ y >>= 2;
+
+ d += 1461L * (y % 25);
+ y /= 25;
+
+ d += times36524[y & 3];
+
+ return d;
+}
diff --git a/cal/caldate_norm.c b/cal/caldate_norm.c
new file mode 100644
index 0000000..7e99ac3
--- /dev/null
+++ b/cal/caldate_norm.c
@@ -0,0 +1,7 @@
+#include "caldate.h"
+
+void caldate_normalize(cd)
+struct caldate *cd;
+{
+ caldate_frommjd(cd,caldate_mjd(cd),(int *) 0,(int *) 0);
+}
diff --git a/cal/caldate_scan.c b/cal/caldate_scan.c
new file mode 100644
index 0000000..fa62b7e
--- /dev/null
+++ b/cal/caldate_scan.c
@@ -0,0 +1,25 @@
+#include "caldate.h"
+
+unsigned int caldate_scan(s,cd)
+char *s;
+struct caldate *cd;
+{
+ int sign = 1;
+ char *t = s;
+ unsigned long z;
+ unsigned long c;
+
+ if (*t == '-') { ++t; sign = -1; }
+ z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
+ cd->year = z * sign;
+
+ if (*t++ != '-') return 0;
+ z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
+ cd->month = z;
+
+ if (*t++ != '-') return 0;
+ z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
+ cd->day = z;
+
+ return t - s;
+}
diff --git a/cal/caldate_ster.c b/cal/caldate_ster.c
new file mode 100644
index 0000000..b016331
--- /dev/null
+++ b/cal/caldate_ster.c
@@ -0,0 +1,24 @@
+#include "caldate.h"
+
+void caldate_easter(cd)
+struct caldate *cd;
+{
+ long c;
+ long t;
+ long j;
+ long n;
+ long y;
+
+ y = cd->year;
+
+ c = (y / 100) + 1;
+ t = 210 - (((c * 3) / 4) % 210);
+ j = y % 19;
+ n = 57 - ((14 + j * 11 + (c * 8 + 5) / 25 + t) % 30);
+ if ((n == 56) && (j > 10)) --n;
+ if (n == 57) --n;
+ n -= ((((y % 28) * 5) / 4 + t + n + 2) % 7);
+
+ if (n < 32) { cd->month = 3; cd->day = n; }
+ else { cd->month = 4; cd->day = n - 31; }
+}
diff --git a/cal/caltime.0 b/cal/caltime.0
new file mode 100644
index 0000000..f2644c4
--- /dev/null
+++ b/cal/caltime.0
@@ -0,0 +1,44 @@
+caltime(3) caltime(3)
+
+
+
+NNAAMMEE
+ caltime - calendar dates and times
+
+SSYYNNTTAAXX
+ ##iinncclluuddee <<ccaallttiimmee..hh>>
+
+ unsigned int ccaallttiimmee__ffmmtt(_s,&_c_t);
+ unsigned int ccaallttiimmee__ssccaann(_s,&_c_t);
+
+ struct caltime _c_t;
+ char *_s;
+
+DDEESSCCRRIIPPTTIIOONN
+ A ssttrruucctt ccaallttiimmee value is a calendar date and time with an offset in
+ minutes from UTC. It has five components: ddaattee (a ssttrruucctt ccaallddaattee),
+ hhoouurr (0...23), mmiinnuuttee (0...59), sseeccoonndd (0...60), and ooffffsseett
+ (-5999...5999).
+
+ For example, a leap second occurred on 30 June 1997 at 23:59:60 UTC.
+ The local time in New York was 30 June 1997 19:59:60 -0400. This local
+ time is represented inside a ssttrruucctt ccaallttiimmee with ddaattee containing 1997,
+ 6, 30; hhoouurr 19; mmiinnuuttee 59; sseeccoonndd 60; and ooffffsseett -240 (4 hours).
+
+FFOORRMMAATTTTIINNGG
+ ccaallttiimmee__ffmmtt prints _c_t in ISO style (yyyy-mm-dd hh:mm:ss +oooo) into the
+ character buffer _s, without a terminating NUL. It returns the number
+ of characters printed. _s may be zero; then ccaallttiimmee__ffmmtt returns the
+ number of characters that would have been printed.
+
+ ccaallttiimmee__ssccaann reads a calendar date, time, and offset in ISO style from
+ the beginning of the character buffer _s and puts them into _c_t. It
+ returns the number of characters read. If _s does not start with an
+ ISO-style date and time (including offset), ccaallttiimmee__ssccaann returns 0.
+
+SSEEEE AALLSSOO
+ caltime_tai(3), caldate(3), tai(3)
+
+
+
+ caltime(3)
diff --git a/cal/caltime.3 b/cal/caltime.3
new file mode 100644
index 0000000..e100be0
--- /dev/null
+++ b/cal/caltime.3
@@ -0,0 +1,82 @@
+.TH caltime 3
+.SH NAME
+caltime \- calendar dates and times
+.SH SYNTAX
+.B #include <caltime.h>
+
+unsigned int \fBcaltime_fmt\fP(\fIs\fR,&\fIct\fR);
+.br
+unsigned int \fBcaltime_scan\fP(\fIs\fR,&\fIct\fR);
+
+struct caltime \fIct\fR;
+.br
+char *\fIs\fR;
+.SH DESCRIPTION
+A
+.B struct caltime
+value is a calendar date and time with an offset in minutes from UTC.
+It has five components:
+.B date
+(a
+.B struct caldate\fR),
+.B hour
+(0...23),
+.B minute
+(0...59),
+.B second
+(0...60),
+and
+.B offset
+(-5999...5999).
+
+For example,
+a leap second occurred
+on 30 June 1997 at 23:59:60 UTC.
+The local time in New York was
+30 June 1997 19:59:60 -0400.
+This local time is represented inside a
+.B struct caltime
+with
+.B date
+containing 1997, 6, 30;
+.B hour
+19;
+.B minute
+59;
+.B second
+60;
+and
+.B offset
+\-240
+(4 hours).
+.SH FORMATTING
+.B caltime_fmt
+prints
+.I ct
+in ISO style (yyyy-mm-dd hh:mm:ss +oooo)
+into the character buffer
+.IR s ,
+without a terminating NUL.
+It returns the number of characters printed.
+.I s
+may be zero;
+then
+.B caltime_fmt
+returns the number of characters that would have been printed.
+
+.B caltime_scan
+reads a calendar date, time, and offset in ISO style
+from the beginning of the character buffer
+.I s
+and puts them into
+.IR ct .
+It returns the number of characters read.
+If
+.I s
+does not start with an ISO-style date and time (including offset),
+.B caltime_scan
+returns 0.
+.SH "SEE ALSO"
+caltime_tai(3),
+caldate(3),
+tai(3)
diff --git a/cal/caltime_fmt.c b/cal/caltime_fmt.c
new file mode 100644
index 0000000..2ee90bd
--- /dev/null
+++ b/cal/caltime_fmt.c
@@ -0,0 +1,45 @@
+#include "caldate.h"
+#include "caltime.h"
+
+unsigned int caltime_fmt(s,ct)
+char *s;
+struct caltime *ct;
+{
+ unsigned int result;
+ long x;
+
+ result = caldate_fmt(s,&ct->date);
+
+ if (s) {
+ s += result;
+
+ x = ct->hour;
+ s[0] = ' ';
+ s[2] = '0' + (x % 10); x /= 10;
+ s[1] = '0' + (x % 10);
+ s += 3;
+
+ x = ct->minute;
+ s[0] = ':';
+ s[2] = '0' + (x % 10); x /= 10;
+ s[1] = '0' + (x % 10);
+ s += 3;
+
+ x = ct->second;
+ s[0] = ':';
+ s[2] = '0' + (x % 10); x /= 10;
+ s[1] = '0' + (x % 10);
+ s += 3;
+
+ s[0] = ' ';
+ x = ct->offset;
+ if (x < 0) { s[1] = '-'; x = -x; } else s[1] = '+';
+
+ s[5] = '0' + (x % 10); x /= 10;
+ s[4] = '0' + (x % 6); x /= 6;
+ s[3] = '0' + (x % 10); x /= 10;
+ s[2] = '0' + (x % 10);
+ }
+
+ return result + 15;
+}
diff --git a/cal/caltime_scan.c b/cal/caltime_scan.c
new file mode 100644
index 0000000..b690460
--- /dev/null
+++ b/cal/caltime_scan.c
@@ -0,0 +1,40 @@
+#include "caltime.h"
+
+unsigned int caltime_scan(s,ct)
+char *s;
+struct caltime *ct;
+{
+ char *t = s;
+ unsigned long z;
+ unsigned long c;
+ int sign;
+
+ t += caldate_scan(t,&ct->date);
+
+ while ((*t == ' ') || (*t == '\t') || (*t == 'T')) ++t;
+ z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
+ ct->hour = z;
+
+ if (*t++ != ':') return 0;
+ z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
+ ct->minute = z;
+
+ if (*t != ':')
+ ct->second = 0;
+ else {
+ ++t;
+ z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
+ ct->second = z;
+ }
+
+ while ((*t == ' ') || (*t == '\t')) ++t;
+ if (*t == '+') sign = 1; else if (*t == '-') sign = -1; else return 0;
+ ++t;
+ c = (unsigned char) (*t++ - '0'); if (c > 9) return 0; z = c;
+ c = (unsigned char) (*t++ - '0'); if (c > 9) return 0; z = z * 10 + c;
+ c = (unsigned char) (*t++ - '0'); if (c > 9) return 0; z = z * 6 + c;
+ c = (unsigned char) (*t++ - '0'); if (c > 9) return 0; z = z * 10 + c;
+ ct->offset = z * sign;
+
+ return t - s;
+}
diff --git a/cal/caltime_tai.0 b/cal/caltime_tai.0
new file mode 100644
index 0000000..5d0ccf9
--- /dev/null
+++ b/cal/caltime_tai.0
@@ -0,0 +1,43 @@
+caltime(3) caltime(3)
+
+
+
+NNAAMMEE
+ caltime_tai - convert calendar dates and times
+
+SSYYNNTTAAXX
+ ##iinncclluuddee <<ccaallttiimmee..hh>>
+ ##iinncclluuddee <<ttaaii..hh>>
+
+ void ccaallttiimmee__ttaaii(&_c_t,&_t);
+ void ccaallttiimmee__uuttcc(&_c_t,&_t,&_w_e_e_k_d_a_y,&_y_e_a_r_d_a_y);
+
+ struct caltime _c_t;
+ struct tai _t;
+ int *_w_e_e_k_d_a_y;
+ int *_y_e_a_r_d_a_y;
+
+DDEESSCCRRIIPPTTIIOONN
+ ccaallttiimmee__ttaaii reads a date, time, and UTC offset from _c_t. It puts the
+ corresponding TAI64 label into _t.
+
+ ccaallttiimmee__uuttcc reads a TAI64 label from _t. It puts the corresponding date
+ and time into _c_t, with UTC offset 0.
+
+ ccaallttiimmee__uuttcc fills in _w_e_e_k_d_a_y and _y_e_a_r_d_a_y the same way as ccaallddaattee__ffrroomm‐‐
+ mmjjdd.
+
+LLIIMMIITTAATTIIOONNSS
+ The sequence of TAI64 labels has been determined for the next few hun‐
+ dred billion years. The same is not true, however, for calendar dates
+ and times. New leap seconds are added every year or two, as discussed
+ in lleeaappsseeccss(3); and the Gregorian calendar will change in a few thou‐
+ sand years, as discussed in ccaallddaattee__mmjjdd(3). This means that ccaall‐‐
+ ttiimmee__ttaaii and ccaallttiimmee__uuttcc are not useful for dates far in the future.
+
+SSEEEE AALLSSOO
+ caldate_mjd(3), caltime(3), tai(3), leapsecs(3)
+
+
+
+ caltime(3)
diff --git a/cal/caltime_tai.3 b/cal/caltime_tai.3
new file mode 100644
index 0000000..49c6ab1
--- /dev/null
+++ b/cal/caltime_tai.3
@@ -0,0 +1,61 @@
+.TH caltime 3
+.SH NAME
+caltime_tai \- convert calendar dates and times
+.SH SYNTAX
+.B #include <caltime.h>
+.br
+.B #include <tai.h>
+
+void \fBcaltime_tai\fP(&\fIct\fR,&\fIt\fR);
+.br
+void \fBcaltime_utc\fP(&\fIct\fR,&\fIt\fR,&\fIweekday\fR,&\fIyearday\fR);
+
+struct caltime \fIct\fR;
+.br
+struct tai \fIt\fR;
+.br
+int *\fIweekday\fR;
+.br
+int *\fIyearday\fR;
+.SH DESCRIPTION
+.B caltime_tai
+reads a date, time, and UTC offset from
+.IR ct .
+It puts the corresponding TAI64 label into
+.IR t .
+
+.B caltime_utc
+reads a TAI64 label from
+.IR t .
+It puts the corresponding date and time into
+.IR ct ,
+with UTC offset 0.
+
+.B caltime_utc
+fills in
+.I weekday
+and
+.I yearday
+the same way as
+.BR caldate_frommjd .
+.SH LIMITATIONS
+The sequence of TAI64 labels has been determined
+for the next few hundred billion years.
+The same is not true, however, for
+calendar dates and times.
+New leap seconds are added every year or two,
+as discussed in
+.BR leapsecs (3);
+and the Gregorian calendar will change in a few thousand years,
+as discussed in
+.BR caldate_mjd (3).
+This means that
+.B caltime_tai
+and
+.B caltime_utc
+are not useful for dates far in the future.
+.SH "SEE ALSO"
+caldate_mjd(3),
+caltime(3),
+tai(3),
+leapsecs(3)
diff --git a/cal/caltime_tai.c b/cal/caltime_tai.c
new file mode 100644
index 0000000..d4da689
--- /dev/null
+++ b/cal/caltime_tai.c
@@ -0,0 +1,25 @@
+#include "tai.h"
+#include "leapsecs.h"
+#include "caldate.h"
+#include "caltime.h"
+
+/* XXX: breaks tai encapsulation */
+
+void caltime_tai(ct,t)
+struct caltime *ct;