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## Copyright (C) 2001 Bill Denney <bill@denney.ws>
##
## This program is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free Software
## Foundation; either version 3 of the License, or (at your option) any later
## version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
## details.
##
## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {Y =} datesplit(date, P)
## @deftypefnx {Function File} {[Y,M,D,h,m,s] =} datesplit(date, P)
## Split a date string into the Year, Month, Day, hour, minute, and
## second. This routine tries to be as forgiving as possible to the
## date input while requiring that the date is not ambiguous.
##
## Anywhere possible where it would not be ambiguous, efforts were made
## to make times possible with seconds and AM/PM as optional. Also,
## along the same lines, where possible, commas were allowed with
## spaces, and the year/month/day separators were allowed as period (.),
## slash (/), and dash (-). Not all format possibilities are shown in
## the following table, but a date like @code{dd-mmm-yyyy HH:MM:SS} is
## parsed just as well as @code{d/mmm.yyyy, ,H:MM, AM}.
##
## Supported @code{date} formats include (the same as datestr):
## @multitable @columnfractions 0.1 0.45 0.45
## @item @strong{Code} @tab @strong{Format} @tab @strong{Example}
## @item 0 @tab dd-mmm-yyyy HH:MM:SS @tab 07-Sep-2000 15:38:09
## @item 1 @tab dd-mmm-yyyy @tab 07-Sep-2000
## @item 2 @tab mm/dd/yy @tab 09/07/00
## @item 3 @tab mmm @tab Sep
## @item 6 @tab mm/dd @tab 09/13
## @item 10 @tab yyyy @tab 2000
## @item 12 @tab mmmyy @tab Sep00
## @item 13 @tab HH:MM:SS @tab 15:38:09
## @item 14 @tab HH:MM:SS PM @tab 03:38:09 PM
## @item 15 @tab HH:MM @tab 15:38
## @item 16 @tab HH:MM PM @tab 03:38 PM
## @item 17 @tab QQ-YY @tab Q3-00
## @item 19 @tab dd/mm @tab 13/03
## @item 20 @tab dd/mm/yy @tab 13/03/95
## @item 21 @tab mmm.dd.yyyy HH:MM:SS @tab Mar.03.1962 13:53:06
## @item 22 @tab mmm.dd.yyyy @tab Mar.03.1962
## @item 23 @tab mm/dd/yyyy @tab 03/13/1962
## @item 24 @tab dd/mm/yyyy @tab 12/03/1962
## @item 25 @tab yy/mm/dd @tab 95/03/13
## @item 26 @tab yyyy/mm/dd @tab 1995/03/13
## @item 27 @tab QQ-YYYY @tab Q4-2132
## @item 28 @tab mmmyyyy @tab Mar2047
## @item 29 @tab yyyymmdd @tab 20470313
## @item 30 @tab yyyymmddTHHMMSS @tab 20470313T132603
## @item 31 @tab yyyy-mm-dd HH:MM:SS @tab 1047-03-13 13:26:03
## @end multitable
##
## The parameter @code{P} is needed to convert date strings with 2 digit
## years into dates with 4 digit years. 2 digit years are assumed to be
## between @code{P} and @code{P+99}. If @code{P} is not given then the
## current year - 50 is used, so that dates are centered on the present.
## For birthdates, you would want @code{P} to be current year - 99. For
## appointments, you would want @code{P} to be current year.
##
## This function makes no strong attempt to verify the accuracy of the
## numbers that it returns in that it doesn't (currently) check to see
## that you're not trying to use the date Feb 30. When applicable, it
## tries to make your input work, though. It will try to determine if
## you're using the date "03/13/95" that the date is "March 13, 1995",
## but if there is doubt, datesplit will return an error instead of
## trying to guess the wrong value.
##
## @seealso{date,clock,now,datestr,datenum,calendar,weekday}
## @end deftypefn
## TODO:
## * Some formats are ambiguous. Allow the user to specify the format
## to remove ambiguity.
## * Validate the dates.
## * Possible bug (after dates are validated): There are times where
## the year is assumed, Feb 29 may be a valid date, but with the
## assumed year, it may become invalid.
## * Internationalize. Not all months use the English system.
## * Vectorize. That requires vectorization of regexp though...
function [y, m, d, h, mi, s] = datesplit(ds, P)
persistent warned = false;
if (! warned)
warned = true;
warning ("Octave:deprecated-function",
"`datesplit' has been deprecated in favor of `datevec' from Octave core. This function will be removed from future versions of the `financial' package");
endif
if nargin < 2
P = [];
endif
today = datevec(now);
if (isempty(P))
P = today(1)-50;
endif
global __month_names = ["Jan";"Feb";"Mar";"Apr";"May";"Jun";...
"Jul";"Aug";"Sep";"Oct";"Nov";"Dec"];
global __day_names = ["Sun";"Mon";"Tue";"Wed";"Thu";"Fri";"Sat"];
global __time_names = ["AM";"PM"];
if (iscellstr(ds))
ds = ds{1};
endif
ds = tolower(deblank(ds));
if (nargin < 1)
error("datesplit: no input arguments");
elseif (nargin == 1)
fmt = [];
endif
%% we have to determine the format, this could be error prone
## format 0 dd-mmm-yyyy HH:MM:SS e.g. 07-Sep-2000 15:38:09
[match, d, m, y, h, mi, s, ap] = \
of_regexp("^(3[01]|[0-2]?[0-9])[-./]([a-z]{3})[-./]([0-9]{4})[, ]+(2[0-3]|[01]?[0-9]):([0-5][0-9])(:[0-5][0-9]|)[, ]*([ap]m|)$", ds);
## format 21 mmm.dd.yyyy HH:MM:SS e.g. Mar.03.1962 13:53:06
if (isempty(match))
[match, m, d, y, h, mi, s, ap] = \
of_regexp("^([a-z]{3})[-./](3[01]|[0-2]?[0-9])[-./]([0-9]{4})[, ]+(2[0-3]|[01]?[0-9]):([0-5][0-9])(:[0-5][0-9]|)[, ]*([ap]m|)$", ds);
endif
## format 31 yyyy-mm-dd HH:MM:SS e.g. 2004-03-13 13:26:03
if (isempty(match))
[match, y, m, d, h, mi, s, ap] = \
of_regexp("^([0-9]{4})[-./](1[012]|0?[0-9])[-./](3[01]|[0-2]?[0-9])[, ]+(2[0-3]|[01]?[0-9]):([0-5][0-9])(:[0-5][0-9]|)[, ]*([ap]m|)$", ds);
endif
## format 30 yyyymmddTHHMMSS e.g. 20470313T132603
if (isempty(match))
[match, y, m, d, h, mi, s] = \
of_regexp("^([0-9]{4})(1[012]|0[0-9])(3[01]|[012][0-9])t(2[0-3]|[01][0-9])([0-5][0-9])([0-5][0-9])$", ds);
ap = "NA";
endif
## format 13 HH:MM:SS e.g. 15:38:09
## format 14 HH:MM:SS PM e.g. 03:38:09 PM
## format 15 HH:MM e.g. 15:38
## format 16 HH:MM PM e.g. 03:38 PM
if (isempty(match))
[match, h, mi, s, ap] = \
of_regexp("^(2[0-3]|[01]?[0-9]):([0-5][0-9])(:[0-5][0-9]|)[, ]*([ap]m|)$", ds);
if (! isempty(match))
%% assume that it is as of today
y = today(1);
m = today(2);
d = today(3);
endif
endif
## format 1 dd-mmm-yyyy e.g. 07-Sep-2000
if (isempty(match))
[match, d, m, y] = \
of_regexp("^(3[01]|[012]?[0-9])[-./]([a-z]{3})[-./]([0-9]{4})$", ds);
if (! isempty(match))
%% assume the beginning of the day
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 22 mmm.dd.yyyy e.g. Mar.03.1962
if (isempty(match))
[match, m, d, y] = \
of_regexp("^([a-z]{3})[-./](3[01]|[012]?[0-9])[-./]([0-9]{4})$", ds);
if (! isempty(match))
%% assume the beginning of the day
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 2 mm/dd/yy e.g. 09/07/00
## format 23 mm/dd/yyyy e.g. 03/13/1962
## format 20 dd/mm/yy e.g. 13/03/95
## format 24 dd/mm/yyyy e.g. 12/03/1962
## format 25 yy/mm/dd e.g. 95/03/13
## format 26 yyyy/mm/dd e.g. 1995/03/13
if (isempty(match))
[match, d, m, y] = \
of_regexp("^([0-9]{1,2}|[0-9]{4})[-./](3[01]|[012]?[0-9])[-./]([0-9]{1,2}|[0-9]{4})$", ds);
if (! isempty(match))
%% we have to determine if the date is unambiguous
d = str2num(d);
m = str2num(m);
y = str2num(y);
if ((y == 0) || (y > 31))
%% we've got the year correct
if ((m > 12) && (d < 13))
%% we're operating on mm/dd/yyyy
tmp = m;
m = d;
d = tmp;
elseif ((m < 13) && (d > 12))
%% it's fine
else
%% it's ambiguous
error(["datesplit: ambiguous date " ds]);
endif
elseif ((d == 0) || (d > 31))
%% the day and the year need to be switched
tmp = y;
y = d;
d = tmp;
else
%% it's ambiguous
error(["datesplit: ambiguous date " ds]);
endif
%% assume the beginning of the day
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 29 yyyymmdd e.g. 20470313
if (isempty(match))
[match, y, m, d] = \
of_regexp("^([0-9]{4})(1[012]|0?[0-9])(3[01]|[012][0-9])$", ds);
%% I've never seen a date that has the year first that was not
%% yyyy/mm/dd, so I'm going to assume that it's unambiguous.
if (! isempty(match))
%% assume the beginning of the day
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 17 QQ-YY e.g. Q3-00
## format 27 QQ-YYYY e.g. Q4-2132
if (isempty(match))
[match, q, y] = \
of_regexp("^q([1-4])[-./]([0-9]{2}|[0-9]{4})$", ds);
if (! isempty(match))
%% Assume that it's the end of the quarter
q = str2num(q);
m = 3*q;
dayopts = [31 30 30 31];
d = dayopts(q);
%% assume the end of the day
h = 23;
mi = 59;
s = 59;
ap = "NA";
endif
endif
## format 28 mmmyyyy e.g. Mar2047
## format 12 mmmyy e.g. Sep00
if (isempty(match))
[match, m, y] = \
of_regexp("^([a-z]{3})([0-9]{2}|[0-9]{4})$", ds);
if (! isempty(match))
%% assume the beginning of the month
d = 1;
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 6 mm/dd e.g. 09/07
## format 19 dd/mm e.g. 13/03
if (isempty(match))
[match, m, d] = \
of_regexp("^(3[01]|[012]?[0-9])[-./](3[01]|[012][0-9])$", ds);
if (! isempty(match))
m = str2num(m);
d = str2num(d);
%% we have to determine if the date is unambiguous
if ((m > 12) && (d < 13))
%% we're operating on mm/dd/yyyy
tmp = m;
m = d;
d = tmp;
elseif ((m < 13) && (d > 12))
%% it's fine
else
%% it's ambiguous
error(["datesplit: ambiguous date " ds]);
endif
%% assume this year and the beginning of the day
y = today(1);
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 10 yyyy e.g. 2000
if (isempty(match))
[match, y] = of_regexp("^([0-9]{4})$", ds);
if (! isempty(match))
%% assume the beginning of the year
m = 1;
d = 1;
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 3 mmm e.g. Sep
if (isempty(match))
m = strmatch(ds, tolower(__month_names));
if (! isempty(m))
match = 1;
%% assuming the beginning of the month, this year
y = today(1);
d = 1;
h = 0;
mi = 0;
s = 0;
ap = "NA";
endif
endif
## format 8 ddd e.g. Thu
%% People shouldn't use this function for something like this
if (isempty(match))
%% you mean I did all that work, and you still didn't use a valid
%% date? Darn you!
error(["datesplit: Unknown date format " ds]);
endif
if (! isempty(match))
if isempty(s)
s = 0;
elseif (ischar(s) && (1 == findstr(s,":")))
s = s(2:3);
endif
if isempty(ap)
ap = "NA";
endif
endif
%% start converting the date from characters to numbers
if (ischar(y))
y = str2num(y);
if (isempty(y))
error(["datesplit: Invalid year specification " y]);
endif
endif
%% Handle Y2K issues...
if (y < 100)
y = y + 1900;
if (y < P)
y = y + 100;
endif
endif
if (ischar(m))
m_num = str2num(m);
if (isempty(m_num))
m = strmatch(m, tolower(__month_names));
else
m = m_num;
endif
if (isempty(m))
error(["datesplit: Invalid month specification"]);
endif
endif
if (ischar(d))
d = str2num(d);
if (isempty(d))
error(["datesplit: Invalid day specification " d]);
endif
endif
if (ischar(h))
h = str2num(h);
if (isempty(h))
error(["datesplit: Invalid hour specification " h]);
elseif ((ap(2) == "M") && (h > 12))
error(["datesplit: Invalid hour specification, AM or PM specified but"
"hour is greater than 12."]);
endif
if (strcmpi(ap, "PM") && (h < 12))
h = h + 12;
elseif (strcmpi(ap, "AM") && (h == 12))
h = 0;
endif
endif
if (ischar(mi))
mi = str2num(mi);
if (isempty(mi) || (mi > 59))
error(["datesplit: Invalid minute specification " mi]);
endif
endif
if (ischar(s))
s = str2num(s);
if (isempty(s) || (s > 59))
error(["datesplit: Invalid second specification " s]);
endif
endif
if (nargout <= 1)
y = [y, m, d, h, mi, s];
endif
endfunction
# wrapper around Octave's regexp
# compatible with octave-forge's regexp
function varargout = of_regexp(pattern,string)
[S, E, TE, M, T, NM] = regexp(string,pattern);
varargout{1} = S;
# return sub-strings if match
if (S)
for i=2:nargout
varargout{i} = T{1}{i-1};
end
else
for i=2:nargout
varargout{i} = [];
end
end
endfunction
%!shared nowvec
%! nowvec=datevec(now); % Some tests could fail around midnight!
%!assert (datevec("07-Sep-2000 15:38:09"),[2000,9,7,15,38,9]);
%!assert (datevec("07-Sep-2000"),[2000,9,7,0,0,0]);
%!assert (datevec("1 Jan 2000"),[2000,1,1,0,0,0]);
%!assert (datevec("Sep00"),[2000,9,1,0,0,0]);
%!assert (datevec("15:38:09"),[nowvec(1:3),15,38,9]);
%!assert (datevec("03:38:09 PM"),[nowvec(1:3),15,38,9]);
%!assert (datevec("15:38"),[nowvec(1:3),15,38,0]);
%!assert (datevec("3:38 PM"),[nowvec(1:3),15,38,0]);
%!assert (datevec("03/13/1962"),[1962,3,13,0,0,0]);
## Ambiguous
%!#assert (datevec("09/07/00"),[2000,9,7,0,0,0]);
%!#assert (datevec("09/13"),[nowvec(1),9,13,0,0,0]);
## Not supported in octave version of datevec
%!#assert (datevec("Sep"),[nowvec(1),9,1,0,0,0]);
%!#assert (datevec("Q3-00"),[2000,9,30,23,59,59]);
%!#assert (datevec("Q4-2132"),[2132,12,31,23,59,59]);
## This should be a standard string (without or without the time)
%!assert (datevec("Mar.03.1962 13:53:06","mmm.dd.yyyy HH:MM:SS"),[1962,3,3,13,53,6]);
## No longer a predefined string to parse the date in octave version
%!assert (datevec("1995/03/13","yyyy/mm/dd"),[1995,3,13,0,0,0]);
%!assert (datevec("Mar2047","mmmyyyy"),[2047,3,1,0,0,0]);
%!assert (datevec("20470313","yyyymmdd"),[2047,3,13,0,0,0]);
%!assert (datevec("20470313T132603","yyyymmddTHHMMSS"),[2047,3,13,13,26,3]);
%!assert (datevec("1047-03-13 13:26:03","yyyy-mm-dd HH:MM:SS"),[1047,3,13,13,26,3]);

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