/usr/share/octave/packages/io-2.4.5/private/__COM_oct2spsh__.m is in octave-io 2.4.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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##
## 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} [@var{xlso}, @var{status}] = __COM_oct2spsh__ (@var{obj}, @var{xlsi})
## @deftypefnx {Function File} [@var{xlso}, @var{status}] = __COM_oct2spsh__ (@var{obj}, @var{xlsi}, @var{wsh})
## @deftypefnx {Function File} [@var{xlso}, @var{status}] = __COM_oct2spsh__ (@var{obj}, @var{xlsi}, @var{wsh}, @var{top_left_cell})
## Save matrix @var{obj} into worksheet @var{wsh} in Excel file pointed
## to in struct @var{xlsi}. All elements of @var{obj} are converted into
## Excel cells, starting at cell @var{top_left_cell}. Return argument
## @var{xlso} is @var{xlsi} with updated fields.
##
## __COM_oct2spsh__ should not be invoked directly but rather through oct2xls.
##
## Excel invocations may be left running invisibly in case of COM errors.
##
## Example:
##
## @example
## xls = __COM_oct2spsh__ (rand (10, 15), xls, 'Third_sheet', 'BF24');
## @end example
##
## @seealso {oct2xls, xls2oct, xlsopen, xlsclose, xlswrite, xlsread, xls2com2oct}
##
## @end deftypefn
## Author: Philip Nienhuis <prnienhuis@users.sf.net>
## (originally based on mat2xls by Michael Goffioul)
## Rewritten: 2009-09-26
function [ xls, status ] = __COM_oct2spsh__ (obj, xls, wsh, crange, spsh_opts)
## Preliminary sanity checks
## FIXME - Excel can write to much more than .xls/.xlsx (but not to all
## formats with multiple sheets):
## .wk1 .wk3 .wk4 .csv .pxl .html .dbf .txt .prn .wks .wq1 .dif
if (! strfind (lower (xls.filename(end-4:end)), '.xls'))
error ("COM interface can only write to Excel .xls or .xlsx files\n")
endif
if (isnumeric (wsh))
if (wsh < 1) error ("Illegal worksheet number: %i\n", wsh); endif
elseif (size (wsh, 2) > 31)
error ("Illegal worksheet name - too long\n")
endif
## Check to see if ActiveX is still alive
try
wb_cnt = xls.workbook.Worksheets.count;
catch
error ("ActiveX invocation in file ptr struct seems non-functional\n");
end_try_catch
## define some constants not yet in __COM__.cc
xlWorksheet = -4167; ## xlChart= 4;
## scratch vars
status = 0;
## Parse date ranges
[nr, nc] = size (obj);
[topleft, nrows, ncols, trow, lcol] = ...
spsh_chkrange (crange, nr, nc, xls.xtype, xls.filename);
lowerright = calccelladdress (trow + nrows - 1, lcol + ncols - 1);
crange = [topleft ":" lowerright];
if (nrows < nr || ncols < nc)
warning ("Array truncated to fit in range\n");
obj = obj(1:nrows, 1:ncols);
endif
## Cleanup NaNs. Find where they are and mark as empty
ctype = [0 1 2 3 4]; ## Numeric Boolean Text Formula Empty
typearr = spsh_prstype (obj, nrows, ncols, ctype, spsh_opts);
## Make cells now indicated to be empty, empty
fptr = ! (4 * (ones (size (typearr))) .- typearr);
obj(fptr) = cellfun (@(x) [], obj(fptr), "Uniformoutput", false);
if (spsh_opts.formulas_as_text)
## find formulas (designated by a string starting with "=" and ending in ")")
fptr = cellfun (@(x) ischar (x) && strncmp (x, "=", 1) ...
&& strncmp (x(end:end), ")", 1), obj);
## ... and add leading "'" character
obj(fptr) = cellfun (@(x) ["'" x], obj(fptr), "Uniformoutput", false);
endif
clear fptr;
if (xls.changed < 3)
## Existing file OR a new file with data added in a previous oct2xls call.
## Some involved investigation is needed to preserve
## existing data that shouldn't be touched.
##
## See if desired *sheet* name exists.
old_sh = 0;
ws_cnt = xls.workbook.Sheets.count;
if (isnumeric (wsh))
if (wsh <= ws_cnt)
## Here we check for sheet *position* in the sheet stack
## rather than a name like "Sheet<Number>"
old_sh = wsh;
else
## wsh > nr of sheets; proposed new sheet name.
## This sheet name can already exist to the left in the sheet stack!
shnm = sprintf ("Sheet%d", wsh);
shnm1 = shnm;
endif
endif
if (! old_sh)
## Check if the requested (or proposed) sheet already exists
## COM objects are not OO (yet?), so we need a WHILE loop
ii = 1; jj = 1;
while ((ii <= ws_cnt) && ! old_sh)
## Get existing sheet names one by one
sh_name = xls.workbook.Sheets(ii).name;
if (! isnumeric (wsh) && strcmp (sh_name, wsh))
## ...and check with requested sheet *name*...
old_sh = ii;
elseif (isnumeric (wsh) && strcmp (sh_name, shnm))
## ... or proposed new sheet name (corresp. to requested sheet *number*)
shnm = [shnm "_"];
ii = 0; ## Also check if this new augmented sheet name exists...
if (strcmp (shnm1, sh_name)), jj++; endif
if (jj > 5) ## ... but not unlimited times...
error (sprintf ...
(" > 5 sheets named [_]Sheet%d already present!\n", wsh));
endif
endif
++ii;
endwhile
endif
if (old_sh)
## Requested sheet exists. Check if it is a *work*sheet
if (! (xls.workbook.Sheets(old_sh).Type == xlWorksheet))
## Error as you can't write data to Chart sheet
error (sprintf ("Existing sheet '%s' is not type worksheet.\n", wsh));
else
## Simply point to the relevant sheet
sh = xls.workbook.Worksheets (old_sh);
endif
else
## Add a new worksheet. Earlier it was checked whether this is safe
try
sh = xls.workbook.Worksheets.Add ();
catch
error (sprintf ("Cannot add new worksheet to file %s\n", xls.filename));
end_try_catch
if (! isnumeric (wsh))
sh.Name = wsh;
else
sh.Name = shnm;
printf ("Writing to worksheet %s\n", shnm);
endif
## Prepare to move new sheet to right of the worksheet stack anyway
ws_cnt = xls.workbook.Worksheets.count; ## New count needed
## Find where Excel has left it. We have to, depends on Excel version :-(
ii = 1;
while ((ii < ws_cnt+1) && ! strcmp (sh.Name, xls.workbook.Worksheets(ii).Name) == 1)
++ii;
endwhile
## Excel can't move it beyond the current last one, so we need a trick.
## First move it to just before the last one....
xls.workbook.Worksheets(ii).Move (before = xls.workbook.Worksheets(ws_cnt));
## ....then move the last one before the new sheet.
xls.workbook.Worksheets (ws_cnt).Move (before = xls.workbook.Worksheets(ws_cnt - 1));
endif
else
## The easy case: a new Excel file. Workbook was created in xlsopen.
## Delete empty non-used sheets, last one first
xls.app.Application.DisplayAlerts = 0;
ii = xls.workbook.Sheets.count;
while (ii > 1)
xls.workbook.Worksheets(ii).Delete();
--ii;
endwhile
xls.app.Application.DisplayAlerts = 1;
## Write to first worksheet:
sh = xls.workbook.Worksheets (1);
## Rename the sheet
if (isnumeric (wsh))
sh.Name = sprintf ("Sheet%i", wsh);
else
sh.Name = wsh;
endif
xls.changed = 2; ## 3 => 2
endif
## MG's original part.
## Save object in Excel sheet, starting at cell top_left_cell
if (! isempty(obj))
r = sh.Range (crange);
try
r.Value = obj;
catch
error (sprintf ("Cannot add data to worksheet %s in file %s\n",...
sh.Name, xls.filename));
end_try_catch
delete (r);
endif
## If we get here, all went OK
status = 1;
xls.changed = max (xls.changed, 1); ## If it was 2, preserve it.
endfunction
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