1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
########################################################################
##
## Copyright (C) 2014-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave 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.
##
## Octave 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 Octave; see the file COPYING. If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {} open @var{file}
## @deftypefnx {} {@var{output} =} open (@var{file})
## Open the file @var{file} in Octave or in an external application based on
## the file type as determined by the filename extension.
##
## By default, recognized file types are
##
## @table @code
## @item .m
## Open file in the editor. No @var{output} value is returned.
##
## @item .mat
## @itemx octave-workspace
## Open the data file with @code{load}. If no return value @var{output}
## is requested, variables are loaded in the base workspace. Otherwise
## @var{output} will be a structure containing loaded data.
## @xref{XREFload,,load function}.
##
## @item .ofig
## Open the figure with @code{hgload}.
## @xref{XREFhgload,,hgload function}.
##
## @item .fig, .ofig
## Load the figure
##
## @item .exe
## Execute the program (on Windows systems only). No @var{output} value
## is returned.
## @end table
##
## Custom file extensions may also be handled if a function @code{openxxx},
## where @code{xxx} is the extension, is found in the load path. The function
## must accept the file name as input. For example, in order to load
## @nospell{@qcode{".dat"}} data files in the base workspace, as is done by
## default for @qcode{".mat"} files, one may define
## @nospell{@qcode{"opendat.m"}} with the following contents:
##
## @example
## @group
## function retval = opendat (fname)
## evalin ("base", sprintf ("load ('%s');", fname));
## endfunction
## @end group
## @end example
##
## Other file types are opened in the appropriate external application.
## @end deftypefn
function output = open (file)
if (nargin < 1)
print_usage ();
endif
if (! ischar (file))
error ("open: FILE must be a string");
endif
if (! exist (file, "file"))
error ("open: unable to find file %s", file);
endif
file = make_absolute_filename (tilde_expand (file));
[~, fname, ext] = fileparts (file);
if (! isempty (ext)
&& any (exist (["open" lower(ext(2:end))]) == [2 3 5 103]))
try
openfcn = ["open" lower(ext(2:end))];
if (nargout > 0)
output = feval (openfcn, file);
else
feval (openfcn, file);
endif
catch
error ("open: %s", lasterr);
end_try_catch
elseif (strcmpi (ext, ".m"))
edit (file);
elseif (strcmpi (ext, ".mat") || strcmp (fname, "octave-workspace"))
if (nargout > 0)
output = load (file);
else
evalin ("base", sprintf ("load ('%s');", file));
endif
elseif (strcmpi (ext, ".ofig"))
if (nargout > 0)
output = openfig (file);
else
openfig (file);
endif
elseif (any (strcmpi (ext, {".mdl", ".slx", ".prj"})))
error ("open: opening file type '%s' is not supported", ext);
elseif (strcmpi (ext, ".exe"))
if (ispc ())
dos (file);
else
error ("open: executing .exe files is only supported on Windows systems");
endif
else
__open_with_system_app__ (file);
endif
endfunction
## Test input validation
%!error <Invalid call> open ()
%!error open ("abc", "def")
%!error <FILE must be a string> open (1)
|
