Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / io-1.0.19 / calccelladdress.m

diff --git a/octave_packages/io-1.0.19/calccelladdress.m b/octave_packages/io-1.0.19/calccelladdress.m
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+## Copyright (C) 2009,2010,2011 Philip Nienhuis <pr.nienhuis@users.sf.net>
+##
+## 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/>.
+
+## calccelladdress (R, C) - compute spreadsheet style cell address from
+## row & column index (both 1-based).
+## 
+## Max column index currently set to 18278 (max ODS: 1024, OOXML: 16384).
+## Row limits for ODF and OOXML are 65536 and 1048576, resp.
+
+## Author: Philip Nienhuis <prnienhuis at users.sf.net>
+## Created: 2009-12-12
+## Updates:
+## 2009-12-27 Fixed OOXML limits
+## 2010-03-17 Simplified argument list, only row + column needed
+## 2010-09-27 Made error message more comprehensible
+## 2010-10-11 Added check for row range
+## 2011-04-21 Added tests
+## 2011-04-30 Simplified column name computation
+## 2011-12-17 Bugfix for wrong column address if column equals multiple of 26
+## 2011-12-18 Added tests for multiple-of-26 cases
+
+function [ celladdress ] = calccelladdress (row, column)
+
+       if (nargin < 2) error ("calccelladdress: Two arguments needed") endif
+
+       if (column > 18278 || column < 1) error ("Specified column out of range (1..18278)"); endif
+       if (row > 1048576 || row < 1), error ('Specified row out of range (1..1048576)'); endif
+
+       str = '';
+       while (column > 0.01)
+               rmd = floor ((column - 1) / 26);
+               str = [char(column - rmd * 26 + 'A' - 1) str];
+               column = rmd;
+       endwhile
+
+       celladdress = sprintf ("%s%d", str, row);
+
+endfunction
+
+%!test
+%! a = calccelladdress (1, 1);
+%! assert (a, 'A1');
+
+%!test
+%! a = calccelladdress (378, 28);
+%! assert (a, 'AB378');
+
+%!test
+%! a = calccelladdress (65536, 1024);
+%! assert (a, 'AMJ65536');
+
+%!test
+%! a = calccelladdress (1048576, 16384);
+%! assert (a, 'XFD1048576');
+
+%!test
+%! a = calccelladdress (378, 26);
+%! assert (a, 'Z378');
+
+%!test
+%! a = calccelladdress (378, 702);
+%! assert (a, 'ZZ378');
+
+%!test
+%! a = calccelladdress (378, 701);
+%! assert (a, 'ZY378');
+
+%!test
+%! a = calccelladdress (378, 703);
+%! assert (a, 'AAA378');
+
+%!test
+%! a = calccelladdress (378, 676);
+%! assert (a, 'YZ378');
+
+