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annotate examples/unwinddemo.cc @ 19654:a1d172bfcb2f gui-release

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eliminate some unused variable and typedef warnings * pr-output.cc, profiler.cc, ov-base-diag.cc, ov-perm.cc: Eliminate unused variables and typedefs.
author John W. Eaton <jwe@octave.org>
date Fri, 23 Jan 2015 16:09:35 -0500
parents be41c30bcb44
children
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1 #include <octave/oct.h>
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2 #include <octave/unwind-prot.h>
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3
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4 void
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5 my_err_handler (const char *fmt, ...)
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6 {
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7 // Do nothing!!
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8 }
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9
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10 DEFUN_DLD (unwinddemo, args, nargout, "Unwind Demo")
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11 {
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12 octave_value retval;
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13 int nargin = args.length ();
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14
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15 if (nargin < 2)
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16 print_usage ();
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17 else
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18 {
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19 NDArray a = args(0).array_value ();
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20 NDArray b = args(1).array_value ();
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21
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22 if (! error_state)
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23 {
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24 // Declare unwind_protect frame which lasts as long as
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25 // the variable frame has scope.
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26 unwind_protect frame;
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27 frame.protect_var (current_liboctave_warning_handler);
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28
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29 set_liboctave_warning_handler (my_err_handler);
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30 retval = octave_value (quotient (a, b));
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31 }
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32 }
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33 return retval;
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34 }