annotate libinterp/corefcn/oct-fstrm.cc @ 20614:10ec79b47808

use new string_value method to handle value extraction errors * __voronoi__.cc, chol.cc, colamd.cc, fftw.cc: Use new string_value method.
author John W. Eaton <jwe@octave.org>
date Thu, 08 Oct 2015 18:15:56 -0400
parents 4197fc428c7d
children
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1 /*
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2
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3 Copyright (C) 1996-2015 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <cerrno>
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28 #include <cstring>
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29
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30 #include "error.h"
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31 #include "oct-fstrm.h"
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32
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33 octave_stream
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34 octave_fstream::create (const std::string& nm_arg, std::ios::openmode arg_md,
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35 oct_mach_info::float_format ff)
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36 {
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37 return octave_stream (new octave_fstream (nm_arg, arg_md, ff));
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38 }
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39
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40 octave_fstream::octave_fstream (const std::string& nm_arg,
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41 std::ios::openmode arg_md,
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42 oct_mach_info::float_format ff)
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43 : octave_base_stream (arg_md, ff), nm (nm_arg)
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44 {
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45
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46 #if CXX_ISO_COMPLIANT_LIBRARY
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47
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48 fs.open (nm.c_str (), arg_md);
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49
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50 #else
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51 // Override default protection of 0664 so that umask will appear to
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52 // do the right thing.
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53
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54 fs.open (nm.c_str (), arg_md, 0666);
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55
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56 #endif
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57
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58 if (! fs)
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59 error (gnulib::strerror (errno));
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60 }
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61
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62 // Position a stream at OFFSET relative to ORIGIN.
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63
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64 int
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65 octave_fstream::seek (off_t, int)
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66 {
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67 error ("fseek: invalid_operation");
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68 return -1;
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69 }
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70
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71 // Return current stream position.
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72
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73 off_t
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74 octave_fstream::tell (void)
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75 {
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76 error ("ftell: invalid_operation");
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77 return -1;
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78 }
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79
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80 // Return nonzero if EOF has been reached on this stream.
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82 bool
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83 octave_fstream::eof (void) const
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84 {
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85 return fs.eof ();
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86 }
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87
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88 void
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89 octave_fstream::do_close (void)
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90 {
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91 fs.close ();
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92 }
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93
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94 std::istream *
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95 octave_fstream::input_stream (void)
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96 {
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97 std::istream *retval = 0;
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98
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99 if (mode () & std::ios::in)
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100 retval = &fs;
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101
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102 return retval;
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103 }
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104
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105 std::ostream *
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106 octave_fstream::output_stream (void)
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107 {
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108 std::ostream *retval = 0;
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109
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110 if (mode () & std::ios::out)
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111 retval = &fs;
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112
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113 return retval;
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114 }