3 # edit the above to be the full pathname of 'mawk'
4 # @(#) hcal - v01.00.02 - Tue Feb 27 21:21:21 EST 1996
5 # @(#) prints a 3-month (highlighted) calendar centered on the target month
6 # @(#) may be edited for week to start with Sun or Mon & for local language
7 # @(#) to display a usage screen, execute: hcal -h
8 # NOTE: to edit, set ts=4 in 'vi' (or equivalent)
9 # to print, pipe through 'pr -t -e4'
11 # Using ideas from a KornShell script by Mikhail Kuperblum (mikhail@klm.com)
12 # Bob Stockler - bob@trebor.iglou.com - Sysop CompuServe SCOForum [75162,1612]
16 PROG = "hcal" # Program name given to this script
17 # FMT = 0 # date format dd/mm/yyyy
18 # FMT1 = 0 # for weekdays ordered "Mo Tu We Th Fr Sa Su"
19 FMT = 1 # date format mm/dd/yyyy
20 FMT1 = 1 # for weekdays ordered "Su Mo Tu We Th Fr Sa"
21 # edit day & month names and abbreviations for local language names
22 Days[0] = "Mo Tu We Th Fr Sa Su"
23 Days[1] = "Su Mo Tu We Th Fr Sa"
24 MONTHS = "January February March April May June July August"
25 MONTHS = MONTHS " September October November December"
26 Months = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"
27 # STDOUT = 0 # emulate SCO Unix 'cal' (NO highlighting)
28 STDOUT = 1 # default to highlight mode
29 MINUS = "-" # possible input date field delimiter
30 SLASH = "/" # possible input date field delimiter
31 DOT = "." # possible input date field delimiter
32 IDFD = "[" MINUS # make MINUS the first character in this series
33 IDFD = IDFD SLASH # so that it stands for itself in the RE
34 IDFD = IDFD DOT "]" # Input Date Field Delimiters RE
35 ODFD = SLASH # Output Date Field Delimiter (default)
36 DATE_FMT = "%.2d%s%.2d%s%.4d" # date format
37 ## this script presumes 'date' recognizes these arguments in these ways:
38 ## w - Day of the week - Sunday = 0
39 ## m - Month of year - 01 to 12
40 ## d - Day of month - 01 to 31
41 ## y Last 2 digits of year - 00 to 99
42 ## Y - Year (including century), as decimal numbers
43 ## j - Day of the year - 001 to 366 (Julian date)
44 ## T - Time as HH:MM:SS
45 ## X Current time, as defined by the locale
46 ## a - Abbreviated weekday - Sun to Sat
47 ## b - Abbreviated month name
48 ## Z - Timezone name, or no characters if no timezone exists
49 ## Command to get today's date information:
50 ## DATE = "/bin/date '+%w %m %d 19%y %j~%a %b %d %T %Z 19%y'"
52 ## DATE = DATE = "/bin/date '+%w %m %d 19%y %j~%a %h %d %T 19%y'"
53 DATE = "/bin/date '+%w %m %d %Y %j~%a %b %d %X %Z %Y'"
56 INT_RE = "^[0-9]+$" # unsigned integer RE
57 S_INT_RE = "^[-+][0-9]+$" # signed integer RE
58 MNAM_RE = "^[A-Za-z]+$" # month name RE
59 YEAR_RE = "^[0-9]?[0-9]?[0-9]?[0-9]$"
60 DATE_RE = "^[0-9]?[0-9]" IDFD "[0-9]?[0-9]" IDFD "[0-9]?[0-9]?[0-9]?[0-9]$"
61 DAT1_RE = "^[0-9]?[0-9]" IDFD "[0-9]?[0-9]$"
64 split("31 28 31 30 31 30 31 31 30 31 30 31",Mdays) ; Mdays[0] = 0
67 if ( ARGV[1] == "-x" ) {
68 # standout mode switch
69 if ( STDOUT == 1 ) STDOUT = 0 ; else STDOUT = 1
70 ARG1 = ARGV[2] ; ARG2 = ARGV[3] ; NUM_ARGS -= 1
72 else if ( ARGV[1] ~ /^-[h?]$/ ) { HELP = 1 ; exit }
73 else { ARG1 = ARGV[1] ; ARG2 = ARGV[2] }
76 # get the terminal standout-start & standout-end control codes
77 so = ENVIRON["so"] ; if ( ! so ) "tput smso" | getline so
78 se = ENVIRON["se"] ; if ( ! se ) "tput rmso" | getline se
81 if ( NUM_ARGS == 0 ) {
82 # no arguments - print a calendar display centered on today
85 else if ( NUM_ARGS == 1 ) {
86 # one argument - may be a month name, date, year, or interval of days
87 if ( ARG1 ~ DATE_RE ) DATE1 = Fmt_Date(ARG1)
88 else if ( ARG1 ~ DAT1_RE ) DATE1 = ARG1
89 else if ( ARG1 ~ MNAM_RE ) { Get_Mnum() ; DATE1 = RMSO = ARG1 "/1" }
90 else if ( ARG1 ~ S_INT_RE ) INTERVAL = ARG1 + 0
91 else if ( ARG1 ~ INT_RE ) {
92 if ( ARG1 > 0 && ARG1 <= 9999 ) YEAR = ARG1 + 0
93 else if ( ARG1 > 9999 ) { ERR = 9 ; exit }
94 else { ERR = 7 ; exit }
96 else { ERR = 1 ; exit }
98 else if ( NUM_ARGS == 2 ) {
99 # two arguments, the second of which must be an integer
100 if ( ARG2 ~ INT_RE ) {
102 if ( ARG2 < 1 ) { ERR = 7 ; exit }
103 else if ( ARG2 > 9999 ) { ERR = 9 ; exit }
105 else { ERR = 1 ; exit }
107 # the first may be a string or an integer
108 if ( ARG1 ~ INT_RE ) {
109 # a month number and a year
110 if ( ARG1 < 1 || ARG1 > 12 ) { ERR = 4 ; mm = ARG1 ; exit }
112 else if ( ARG1 ~ MNAM_RE ) {
115 else { ERR = 6 ; exit }
116 DATE1 = ARG1 "/1/" ARG2
118 else { ERR = 2 ; exit }
120 if ( DEFAULT ) { Get_Now() }
121 else if ( INTERVAL ) {
123 daynum = daynum + ( INTERVAL % 7 )
125 DATE1 = Get_Date(INTERVAL,m,d,y,j)
126 split(DATE1,mdy,IDFD)
129 Year[1] = Year[2] = Year[3] = mdy[3] + 0
133 if ( split(DATE1,mdy,IDFD) == 2 ) DATE1 = DATE1 "/" This_Year
137 Year[1] = Year[2] = Year[3] = mdy[3] + 0
138 DATE1 = sprintf( "%.2d/%.2d/%.4d", Mon[2], today, Year[2] )
139 INTERVAL = Get_Num(DATE1,m,d,y,j)
140 daynum = daynum + ( INTERVAL % 7 )
148 Year[1] = Year[2] = Year[3] = YEAR
149 DATE1 = sprintf( "%.2d/%.2d/%.4d", Mon[2], today, Year[2] )
150 INTERVAL = Get_Num(DATE1,m,d,y,j)
151 daynum = daynum + ( INTERVAL % 7 )
154 else { ERR = 5 ; exit }
156 if ( Mon[2] != 1 ) Mon[1] = Mon[2] - 1
157 else { Mon[1] = 12 ; Year[1] -= 1 }
158 if ( Mon[2] != 12 ) Mon[3] = Mon[2] + 1
159 else { Mon[3] = 1 ; Year[3] += 1 }
160 if ( Mon[1] == 2 ) Leap(Year[1])
161 else if ( Mon[2] == 2 ) Leap(Year[2])
162 else if ( Mon[3] == 2 ) Leap(Year[3])
164 Start[2] = 7 - ( ( today - daynum ) % 7 )
165 Start[1] = 7 - ( ( Mdays[Mon[1]] - Start[2] ) % 7 )
166 Start[3] = ( Mdays[Mon[2]] + Start[2] ) % 7
168 if ( ! YEAR ) quarters = 1
170 quarters = 4 ; s[3] = Start[3]
171 for (i=4;i<=12;i++) { s[i] = ( Mdays[i-1] + s[i-1] ) % 7 }
173 for ( quarter = 1 ; quarter <= quarters ; quarter++ ) {
176 ll = 0 ; Mon[1] += 3 ; Mon[2] += 3 ; Mon[3] += 3
177 Start[1] = s[Mon[1]] ; Start[2] = s[Mon[2]] ; Start[3] = s[Mon[3]]
179 if ( Year[2] == 1752 && Mon[2] ~ /8|9|10/ ) Kludge_1752()
180 if ( ARG1 ) print "" ; else printf( "\n%s\n\n", this_date )
181 for (i=1;i<=3;i++) { while ( Start[i] >= 7 ) Start[i] -= 7 }
182 for (mm=1;mm<=3;mm++) { l = 1
183 if ( mm != 2 ) { So = Se = "" } else { So = so ; Se = se }
184 cal[mm SUBSEP l++] = sprintf( "%s %-4s%.4d %s ", \
185 So, M_Name[Mon[mm]], Year[mm], Se )
186 cal[mm SUBSEP l++] = sprintf( "%s%3s", Days[FMT1], "" )
188 while ( j <= Mdays[Mon[mm]] ) {
191 if ( Start[mm] > 0 || j > Mdays[Mon[mm]] ) {
192 date = "" ; Start[mm]-- }
194 if ( Year[mm] == 1752 && Mon[mm] == 9 && date == 3 ) {
196 if ( date == today && mm == 2 && ! RMSO ) {
198 else { So = Se = "" }
199 line = sprintf( "%s%s%2s%s ", line, So, date, Se )
201 cal[mm SUBSEP l++] = sprintf( "%s ", line )
206 for (mm=1;mm<=3;mm++) {
207 if ( cal[mm SUBSEP l] != "" ) printf( cal[mm SUBSEP l] )
208 else printf( "%23s", "" )
209 if ( mm % 3 == 0 ) print ""
217 if ( ! HELP && ! ERR ) exit 0
219 for (i=1;i<ARGC;i++) { ARGS = ARGS sp ARGV[i] ; sp = " " }
220 if ( ERR == 1 ) msg = "Bad argument format or content:"
221 else if ( ERR == 2 ) msg = "Wrong argument count (" ARGC - 1 "):"
222 else if ( ERR == 3 ) msg = "Date before 01/01/0001 (" Get_Y1() "):"
223 else if ( ERR == 4 ) msg = "Bad month (" mm "):"
224 else if ( ERR == 5 ) msg = "Bad date (" dd "):"
225 else if ( ERR == 6 ) msg = "Impossible date:"
226 else if ( ERR == 7 ) msg = "The was no year 0000:"
227 else if ( ERR == 8 ) msg = "Non-unique month name (" ARG1 "):"
228 else if ( ERR == 9 ) msg = "Year greater than 9999:"
229 else msg = "Unknown error:"
233 if ( FMT == 1 ) { fmt = "[m]m/[d]d[/yyyy]" ; range = "12/31/9999" }
234 else { fmt = "[d]d/[m]m[/yyyy]" ; range = "31/12/9999" }
235 if ( STDOUT == 0 ) n = " not " ; else n = " " ; sp = " "
236 u= "\n Usage: " PROG " [-x] [args]\n\n" sp
237 u=u "Prints a 3-month calendar centered on the target month.\n\n" sp
238 u=u "The default is" n "to highlight the target month (and date if\n" sp
239 u=u "appropriate); -x switches the default highlight behavior.\n" sp
240 u=u "With no arguments the target date defaults to today.\n\n" sp
241 u=u "Arguments may be a date in " fmt " format (where\n" sp
242 u=u "leading 0's are implied in all unfilled fields, defaulting\n" sp
243 u=u "to the current year if that field is omitted); a month and\n" sp
244 u=u "year (where month may be an integer or a month name, perhaps\n" sp
245 u=u "abbreviated, but sufficient to be unique); or the month name\n" sp
246 u=u "alone (which defaults to the current year); or a year alone\n" sp
247 u=u "(which prints a 12-month calendar for that year).\n\n" sp
248 u=u "A signed integer alone as an argument specifies the target\n" sp
249 u=u "date to be -n days before or +n days after the current date.\n\n" sp
250 u=u "Dates from 01/01/0001 to " range " are supported.\n"
253 printf( "\n%s: %s %s%s%s\n", PROG, msg, q, ARGS, q ) >"/dev/tty"
254 print usage >"/dev/tty"
259 # get the week, month, date & year numbers and the time-of-day
263 daynum = field[1] + FMT1
264 m = field[2] ; This_Mon = Mon[2] = m + 0
265 d = field[3] ; This_Date = today = d + 0
266 y = This_Year = Year[1] = Year[2] = Year[3] = field[4]
267 j = julian = field[5] + 0
271 function Fmt_Date(date) {
272 # format dates as mm/dd/yyyy or dd/mm/yyyy
273 split(date,MorD_DorM_Y,IDFD)
274 if ( FMT == 1 ) { Dt_Fld1 = MorD_DorM_Y[1] ; Dt_Fld2 = MorD_DorM_Y[2] }
275 else { Dt_Fld1 = MorD_DorM_Y[2] ; Dt_Fld2 = MorD_DorM_Y[1] }
276 Dt_Fld3 = MorD_DorM_Y[3]
277 return sprintf( DATE_FMT, Dt_Fld1, ODFD, Dt_Fld2, ODFD, Dt_Fld3 )
280 function Kludge_1752() {
281 # kludge for September 1752 & the change to the Gregorian Calendar
284 Start[1] = Start[2] = 1 + FMT1 ; Start[3] = -1 + FMT1
286 else if ( Mon[2] == 8 ) {
287 Start[1] = 2 + FMT1 ; Start[2] = 5 + FMT1 ; Start[3] = 1 + FMT1
289 else if ( Mon[2] == 10 ) {
290 Start[1] = 1 + FMT1 ; Start[2] = -1 + FMT1 ; Start[3] = 3
294 function Get_Mnum() {
296 months = tolower(MONTHS)
298 for (i=1;i<=12;i++) {
299 if ( index(month[i],ARG1) == 1 ) { ARG = i ; n++ }
301 if ( n == 1 ) ARG1 = ARG
302 else if ( n == 0 ) { ERR = 1 ; exit }
303 else { ERR = 8 ; exit }
306 function Get_Num(date,m,d,y,j) {
307 # get the number of days from one date to another date
308 NOW = y m d ; N = 0 ; M = m + 0 ; D = d + 0 ; Y = y + 0 ; J = j + 0
310 M2 = mdy[1] ; D2 = mdy[2] ; Y2 = mdy[3]
311 THEN = Y2 M2 D2 ; M2 = M2 + 0 ; D2 = D2 + 0 ; Y2 = Y2 + 0
313 if ( M2 > 12 ) { ERR = 4 ; exit }
314 if ( D2 > Mdays[M2] && Y2 != 1752 && M2 != 9 ) { ERR = 5 ; exit }
315 if ( THEN ~ /^1752090[3-9]$|^1752091[0-3]$/ ) { ERR = 6 ; exit }
318 Ydays = Ydays - J + 1 ; mdays = Mdays[M] - D + 1
319 while ( Y < Y2 ) Next_Y()
320 while ( M < M2 ) Next_M()
321 while ( D < D2 ) Next_D()
325 Ydays = J ; mdays = D
326 while ( Y > Y2 ) Prev_Y()
327 while ( M > M2 ) Prev_M()
328 if ( Y == 1752 && M == 9 && D == 19 ) D = 30
329 while ( D > D2 ) Prev_D()
334 function Get_Date(n,m,d,y,j) {
335 # get the date a number of days before or after a date
336 N = n + 0 ; M = m + 0 ; D = d + 0 ; Y = y + 0 ; J = j + 0
340 Ydays = Ydays - J + 1 ; mdays = Mdays[M] - D + 1
341 while ( N >= Ydays ) { Next_Y() ; Leap(Y) }
342 while ( N >= ( ( mdays > 0 ) ? mdays : Mdays[M] ) ) { Next_M() }
343 while ( N > 0 ) Next_D()
346 Ydays = J ; mdays = D ; N *= -1
347 while ( N >= Ydays ) { Prev_Y() ; Leap(Y) }
348 while ( N >= ( ( mdays > 0 ) ? mdays : Mdays[M] ) ) { Prev_M() }
349 if ( Y == 1752 && M == 9 && D == 19 ) D = 30
350 while ( N > 0 ) Prev_D()
352 if ( Y < 1 ) { ERR = 3 ; exit }
354 return M ODFD D ODFD Y
358 # adjust for Leap Years
359 if ( YR % 4 == 0 && ( YR % 100 != 0 || YR % 400 == 0 || YR < 1800 ) ) {
360 Ydays = 366 ; Mdays[2] = 29 }
361 else { Ydays = 365 ; Mdays[2] = 28 }
362 if ( YR != 1752 ) Mdays[9] = 30
363 else { Ydays = 355 ; Mdays[9] = 19 }
366 function Chk_Date(date) {
367 # check validity of input dates
369 mm = mdy[1] + 0 ; dd = mdy[2] + 0 ; yy = mdy[3] + 0
370 if ( mm == 2 ) Leap(yy)
371 if ( yy < 1 ) { ERR = 3 ; exit }
372 if ( mm < 1 || mm > 12 ) { ERR = 4 ; exit }
373 if ( dd < 1 || dd > Mdays[mm] ) { ERR = 5 ; exit }
376 # day counting functions for next or previous year, month and day
378 N -= Ydays ; Y += 1 ; M = 1 ; D = 1 ; mdays = 0 ; Leap(Y)
381 if ( mdays != 0 ) N -= mdays ; else N -= Mdays[M]
382 M += 1 ; D = 1 ; mdays = 0
386 if ( D > Mdays[M] ) { M += 1 ; D = 1 }
387 else if ( Y == 1752 && M == 9 && D == 2 ) D = 13
390 N -= Ydays ; Y -= 1 ; M = 12 ; D = 31 ; mdays = 0 ; Leap(Y)
393 if ( mdays != 0 ) N -= mdays ; else N -= Mdays[M]
394 M -= 1 ; D = Mdays[M] ; mdays = 0
397 N -= 1 ; D -= 1 ; if ( Y == 1752 && M == 9 && D == 13 ) D = 2
400 function Get_J(m,d,y) {
401 # get the Julian date for an input date
402 m = m + 0 ; d = d + 0 ; y = y + 0
405 for (i=1;i<m;i++) j = j + Mdays[i]
410 # get the number of days to day 1 for the help screen
412 if ( mm ) { m = mm ; d = dd ; y = yy }
413 else if ( M ) { m = M ; d = D ; y = Y }
416 return Get_Num("01/01/0001",m,d,y,j)