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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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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 { |
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60 using namespace std; |
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61 |
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62 error (strerror (errno)); |
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63 } |
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64 } |
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65 |
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66 // Position a stream at OFFSET relative to ORIGIN. |
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67 |
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68 int |
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69 octave_fstream::seek (std::streamoff offset, std::ios::seekdir origin) |
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70 { |
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71 int retval = -1; |
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72 |
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73 if (! fs.bad ()) |
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74 { |
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75 fs.clear (); |
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76 |
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77 std::filebuf *fb = fs.rdbuf (); |
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78 |
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79 if (fb) |
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80 { |
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81 fb->pubseekoff (offset, origin); |
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82 retval = fs.bad () ? -1 : 0; |
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83 } |
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84 } |
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85 |
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86 return retval; |
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87 } |
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88 |
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89 // Return current stream position. |
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90 |
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91 long |
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92 octave_fstream::tell (void) const |
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93 { |
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94 long retval = -1; |
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95 |
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96 if (fs) |
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97 { |
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98 std::filebuf *fb = fs.rdbuf (); |
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99 retval = static_cast<long> (fb->pubseekoff (0, std::ios::cur)); |
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100 } |
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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 // Return non-zero if EOF has been reached on this stream. |
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106 |
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107 bool |
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108 octave_fstream::eof (void) const |
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109 { |
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110 return fs.eof (); |
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111 } |
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112 |
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113 void |
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114 octave_fstream::do_close (void) |
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115 { |
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116 fs.close (); |
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117 } |
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118 |
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119 std::istream * |
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120 octave_fstream::input_stream (void) |
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121 { |
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122 std::istream *retval = 0; |
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123 |
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124 if (mode () & std::ios::in) |
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125 retval = &fs; |
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126 |
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127 return retval; |
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128 } |
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129 |
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130 std::ostream * |
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131 octave_fstream::output_stream (void) |
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132 { |
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133 std::ostream *retval = 0; |
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134 |
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135 if (mode () & std::ios::out) |
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136 retval = &fs; |
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137 |
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138 return retval; |
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139 } |
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140 |
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141 /* |
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142 ;;; Local Variables: *** |
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143 ;;; mode: C++ *** |
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144 ;;; End: *** |
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145 */ |
