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1 /* |
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2 |
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3 Copyright (C) 1996 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 // Originally written by John C. Campbell <jcc@bevo.che.wisc.edu> |
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24 // |
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25 // Thomas Baier <baier@ci.tuwien.ac.at> added the original versions of |
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26 // the following functions: |
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27 // |
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28 // popen |
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29 // pclose |
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30 // execute (now popen2.m) |
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31 // sync_system (now merged with system) |
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32 // async_system (now merged with system) |
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33 |
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34 // Completely rewritten by John W. Eaton <jwe@bevo.che.wisc.edu>, |
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35 // April 1996. |
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36 |
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240
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37 #ifdef HAVE_CONFIG_H |
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38 #include <config.h> |
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39 #endif |
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40 |
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41 #include <climits> |
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42 |
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43 #include <iostream.h> |
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44 |
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45 #ifdef HAVE_UNISTD_H |
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2442
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46 #ifdef HAVE_SYS_TYPES_H |
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47 #include <sys/types.h> |
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48 #endif |
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49 #include <unistd.h> |
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50 #endif |
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51 |
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52 #include "defun.h" |
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53 #include "error.h" |
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1766
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54 #include "file-ops.h" |
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542
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55 #include "help.h" |
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2116
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56 #include "lo-ieee.h" |
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57 #include "oct-fstrm.h" |
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58 #include "oct-iostrm.h" |
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1377
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59 #include "oct-map.h" |
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60 #include "oct-obj.h" |
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61 #include "oct-prcstrm.h" |
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62 #include "oct-stream.h" |
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63 #include "oct-strstrm.h" |
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64 #include "pager.h" |
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444
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65 #include "sysdep.h" |
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1352
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66 #include "syswait.h" |
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67 #include "utils.h" |
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2370
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68 #include "variables.h" |
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69 |
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70 void |
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164
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71 initialize_file_io (void) |
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72 { |
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73 octave_istream *stdin_stream |
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74 = new octave_istream (&cin, "stdin"); |
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75 |
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76 // This uses octave_stdout (see pager.h), not cout so that Octave's |
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77 // standard output stream will pass through the pager. |
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78 |
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79 octave_ostream *stdout_stream |
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80 = new octave_ostream (&octave_stdout, "stdout"); |
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81 |
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82 octave_ostream *stderr_stream |
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83 = new octave_ostream (&cerr, "stderr"); |
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84 |
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85 octave_stream_list::insert (stdin_stream); |
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86 octave_stream_list::insert (stdout_stream); |
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87 octave_stream_list::insert (stderr_stream); |
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88 } |
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89 |
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90 void |
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91 close_files (void) |
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92 { |
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93 octave_stream_list::clear (); |
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94 } |
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636
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95 |
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96 static void |
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97 gripe_invalid_file_id (const char *fcn) |
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98 { |
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99 ::error ("%s: invalid file id", fcn); |
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100 } |
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101 |
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102 static int |
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103 fopen_mode_to_ios_mode (const string& mode) |
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104 { |
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105 int retval = 0; |
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106 |
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107 if (! mode.empty ()) |
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368
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108 { |
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109 // Could probably be faster, but does it really matter? |
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110 |
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111 if (mode == "r") |
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112 retval = ios::in; |
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113 else if (mode == "w") |
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114 retval = ios::out | ios::trunc; |
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115 else if (mode == "a") |
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116 retval = ios::out | ios::app; |
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117 else if (mode == "r+") |
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118 retval = ios::in | ios::out; |
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119 else if (mode == "w+") |
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120 retval = ios::in | ios::out | ios::trunc; |
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121 else if (mode == "a+") |
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122 retval = ios::in | ios::out | ios::app; |
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123 else if (mode == "rb") |
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124 retval = ios::in | ios::bin; |
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125 else if (mode == "wb") |
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126 retval = ios::out | ios::trunc | ios::bin; |
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127 else if (mode == "ab") |
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128 retval = ios::out | ios::app | ios::bin; |
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129 else if (mode == "r+b") |
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130 retval = ios::in | ios::out | ios::bin; |
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131 else if (mode == "w+b") |
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132 retval = ios::in | ios::out | ios::trunc | ios::bin; |
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133 else if (mode == "a+b") |
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134 retval = ios::in | ios::out | ios::app | ios::bin; |
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368
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135 else |
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136 ::error ("invalid mode specified"); |
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137 } |
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138 |
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139 return retval; |
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140 } |
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141 |
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142 DEFUN (fclose, args, , |
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143 "fclose (FILENUM): close a file") |
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529
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144 { |
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145 double retval = -1.0; |
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529
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146 |
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147 int nargin = args.length (); |
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148 |
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149 if (nargin == 1) |
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150 { |
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151 retval = (double) octave_stream_list::remove (args(0)); |
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152 |
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153 if (retval < 0) |
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154 gripe_invalid_file_id ("fclose"); |
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155 } |
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156 else |
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157 print_usage ("fclose"); |
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158 |
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159 return retval; |
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160 } |
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161 |
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162 DEFUN (fflush, args, , |
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163 "fflush (FILENUM): flush buffered data to output file") |
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164 { |
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165 double retval = -1.0; |
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166 |
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167 int nargin = args.length (); |
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168 |
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169 if (nargin == 1) |
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170 { |
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171 octave_stream *os = octave_stream_list::lookup (args(0)); |
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172 |
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173 if (os) |
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174 retval = (double) os->flush (); |
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175 else |
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176 gripe_invalid_file_id ("fflush"); |
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177 } |
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178 else |
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179 print_usage ("fflush"); |
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180 |
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181 return retval; |
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182 } |
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183 |
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184 DEFUN (fgetl, args, , |
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185 "STRING = fgetl (FILENUM [, LENGTH])\n\ |
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186 \n\ |
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187 read a string from a file") |
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188 { |
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189 octave_value retval = -1.0; |
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190 |
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191 int nargin = args.length (); |
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192 |
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193 if (nargin == 1 || nargin == 2) |
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194 { |
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195 octave_stream *os = octave_stream_list::lookup (args(0)); |
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196 |
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197 if (os) |
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198 { |
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199 octave_value len_arg = (nargin == 2) |
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200 ? args(1) : octave_value ((double) INT_MAX); |
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201 |
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202 bool err = false; |
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203 |
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204 string tmp = os->getl (len_arg, err); |
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205 |
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206 if (! err) |
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207 retval = tmp; |
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208 } |
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209 else |
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210 gripe_invalid_file_id ("fgetl"); |
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211 } |
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212 else |
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213 print_usage ("fgetl"); |
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214 |
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215 return retval; |
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216 } |
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217 |
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218 DEFUN (fgets, args, , |
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219 "STRING = fgets (FILENUM [, LENGTH])\n\ |
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220 \n\ |
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221 read a string from a file") |
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529
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222 { |
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223 octave_value retval = -1.0; |
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224 |
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225 int nargin = args.length (); |
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226 |
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227 if (nargin == 1 || nargin == 2) |
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228 { |
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229 octave_stream *os = octave_stream_list::lookup (args(0)); |
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230 |
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231 if (os) |
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232 { |
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233 octave_value len_arg = (nargin == 2) |
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234 ? args(1) : octave_value ((double) INT_MAX); |
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235 |
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236 bool err = false; |
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237 |
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238 string tmp = os->gets (len_arg, err); |
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239 |
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240 if (! err) |
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241 retval = tmp; |
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242 } |
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243 else |
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244 gripe_invalid_file_id ("fgets"); |
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245 } |
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246 else |
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247 print_usage ("fgets"); |
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248 |
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249 return retval; |
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250 } |
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251 |
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252 static octave_base_stream * |
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253 do_stream_open (const string& name, const string& mode, |
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254 const string& arch, int& fid) |
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255 { |
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256 octave_base_stream *retval = 0; |
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257 |
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258 fid = -1; |
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259 |
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260 int md = fopen_mode_to_ios_mode (mode); |
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261 |
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262 if (! error_state) |
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263 { |
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264 oct_mach_info::float_format flt_fmt = |
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265 oct_mach_info::string_to_float_format (arch); |
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266 |
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267 if (! error_state) |
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268 retval = new octave_fstream (name, md, flt_fmt); |
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269 } |
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270 |
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271 return retval; |
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272 } |
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273 |
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274 static octave_base_stream * |
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275 do_stream_open (const octave_value& tc_name, const octave_value& tc_mode, |
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276 const octave_value& tc_arch, const char *fcn, int& fid) |
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277 { |
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278 octave_base_stream *retval = 0; |
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279 |
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280 fid = -1; |
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281 |
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282 string name = tc_name.string_value (); |
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283 |
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284 if (! error_state) |
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285 { |
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286 string mode = tc_mode.string_value (); |
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287 |
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288 if (! error_state) |
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289 { |
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290 string arch = tc_arch.string_value (); |
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291 |
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292 if (! error_state) |
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293 retval = do_stream_open (name, mode, arch, fid); |
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294 else |
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295 ::error ("%s: architecture type must be a string", fcn); |
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296 } |
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297 else |
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298 ::error ("%s: file mode must be a string", fcn); |
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299 } |
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300 else |
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301 ::error ("%s: file name must be a string", fcn); |
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302 |
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303 return retval; |
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304 } |
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305 |
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1957
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306 DEFUN (fopen, args, , |
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307 "[FILENUM, ERRMSG] = fopen (FILENAME, MODE [, ARCH]): open a file\n\ |
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308 \n\ |
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309 FILENAME is a string specifying the name of the file.\n\ |
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310 \n\ |
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311 MODE is a string specifying whether the file should be opened for\n\ |
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312 reading, writing, or both. Valid values for MODE include:\n\ |
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313 \n\ |
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314 r : open text file for reading\n\ |
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315 w : open text file for writing; discard previous contents if any\n\ |
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316 a : append; open or create text file for writing at end of file\n\ |
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317 r+ : open text file for update (i.e., reading and writing)\n\ |
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318 w+ : create text file for update; discard previous contents if any\n\ |
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319 a+ : append; open or create text file for update, writing at end\n\ |
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320 \n\ |
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321 Update mode permits reading from and writing to the same file.\n\ |
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322 \n\ |
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323 ARCH is a string specifying the default data format for the file.\n\ |
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324 Valid values for ARCH are:\n\ |
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325 \n\ |
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326 native -- the format of the current machine (this is the default)\n\ |
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327 ieee-le -- IEEE big endian\n\ |
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328 ieee-be -- IEEE little endian\n\ |
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329 vaxd -- VAX D floating format\n\ |
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330 vaxg -- VAX G floating format\n\ |
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331 cray -- Cray floating format\n\ |
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332 \n\ |
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333 however, conversions are currently only supported for ieee-be, and\n\ |
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334 ieee-le formats.\n\ |
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335 \n\ |
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336 \n\ |
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337 FILENUM is a number that can be used to refer to the open file.\n\ |
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338 If fopen fails, FILENUM is set to -1 and ERRMSG contains a\n\ |
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339 system-dependent error message") |
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529
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340 { |
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341 octave_value_list retval = -1.0; |
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529
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342 |
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343 int nargin = args.length (); |
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344 |
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345 if (nargin == 1) |
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346 { |
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347 if (args(0).is_string () && args(0).string_value () == "all") |
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348 retval(0) = octave_stream_list::open_file_numbers (); |
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349 else |
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350 { |
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351 string_vector tmp = octave_stream_list::get_info (args(0)); |
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529
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352 |
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353 if (! error_state) |
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354 { |
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355 retval(2) = tmp(2); |
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356 retval(1) = tmp(1); |
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357 retval(0) = tmp(0); |
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358 } |
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2432
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359 } |
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1
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360 |
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2432
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361 return retval; |
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1
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362 } |
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363 |
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2095
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364 if (nargin > 0 && nargin < 4) |
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365 { |
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366 octave_value mode = (nargin == 2 || nargin == 3) |
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367 ? args(1) : octave_value ("r"); |
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368 |
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369 octave_value arch = (nargin == 3) |
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370 ? args(2) : octave_value ("native"); |
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371 |
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372 int fid = -1; |
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373 |
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374 octave_base_stream *os |
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375 = do_stream_open (args(0), mode, arch, "fopen", fid); |
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376 |
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377 if (os) |
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378 { |
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379 if (os->ok () && ! error_state) |
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380 { |
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381 retval(1) = ""; |
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382 retval(0) = (double) octave_stream_list::insert (os); |
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383 } |
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384 else |
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385 { |
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386 int errno = 0; |
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387 retval(1) = os->error (false, errno); |
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388 retval(0) = -1.0; |
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389 } |
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390 } |
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391 else |
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392 ::error ("fopen: internal error"); |
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393 } |
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394 else |
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395 print_usage ("fopen"); |
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1
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396 |
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397 return retval; |
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398 } |
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399 |
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1957
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400 DEFUN (freport, args, , |
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1181
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401 "freport (): list open files and their status") |
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402 { |
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2095
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403 octave_value_list retval; |
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1181
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404 |
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405 int nargin = args.length (); |
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406 |
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407 if (nargin > 0) |
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408 warning ("freport: ignoring extra arguments"); |
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409 |
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2095
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410 octave_stdout << octave_stream_list::list_open_files (); |
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1181
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411 |
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412 return retval; |
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413 } |
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414 |
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1957
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415 DEFUN (frewind, args, , |
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2116
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416 "frewind (FILENUM): set file position at beginning of file") |
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529
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417 { |
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2095
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418 double retval = -1.0; |
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1
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419 |
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506
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420 int nargin = args.length (); |
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421 |
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2095
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422 if (nargin == 1) |
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1086
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423 { |
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2095
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424 octave_stream *os = octave_stream_list::lookup (args(0)); |
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636
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425 |
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2095
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426 if (os) |
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427 retval = (double) os->rewind (); |
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1
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428 else |
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2095
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429 gripe_invalid_file_id ("frewind"); |
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1
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430 } |
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431 else |
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2095
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432 print_usage ("frewind"); |
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1
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433 |
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434 return retval; |
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435 } |
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436 |
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1957
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437 DEFUN (fseek, args, , |
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2116
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438 "fseek (FILENUM, OFFSET [, ORIGIN])\n\ |
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1181
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439 \n\ |
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2341
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440 set file position for reading or writing.\n\ |
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441 \n\ |
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442 ORIGIN may be one of:\n\ |
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443 \n\ |
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444 SEEK_SET : offset is relative to the beginning of the file (default)\n\ |
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445 SEEK_CUR : offset is relative to the current position\n\ |
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446 SEEK_END : offset is relative to the end of the file") |
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529
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447 { |
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2095
|
448 double retval = -1.0; |
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529
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449 |
|
|
450 int nargin = args.length (); |
|
|
451 |
|
2095
|
452 if (nargin == 2 || nargin == 3) |
|
|
453 { |
|
|
454 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
1181
|
455 |
|
2095
|
456 if (os) |
|
|
457 { |
|
|
458 octave_value origin_arg = (nargin == 3) |
|
2341
|
459 ? args(2) : octave_value (-1.0); |
|
1
|
460 |
|
2095
|
461 retval = (double) os->seek (args(1), origin_arg); |
|
|
462 } |
|
|
463 else |
|
|
464 ::error ("fseek: invalid file id"); |
|
368
|
465 } |
|
2095
|
466 else |
|
|
467 print_usage ("fseek"); |
|
1
|
468 |
|
|
469 return retval; |
|
|
470 } |
|
|
471 |
|
1957
|
472 DEFUN (ftell, args, , |
|
2116
|
473 "POSITION = ftell (FILENUM): returns the current file position") |
|
1181
|
474 { |
|
2095
|
475 double retval = -1.0; |
|
1
|
476 |
|
506
|
477 int nargin = args.length (); |
|
|
478 |
|
2095
|
479 if (nargin == 1) |
|
1
|
480 { |
|
2095
|
481 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
1
|
482 |
|
2095
|
483 if (os) |
|
|
484 retval = (double) os->tell (); |
|
|
485 else |
|
|
486 gripe_invalid_file_id ("ftell"); |
|
1
|
487 } |
|
|
488 else |
|
2095
|
489 print_usage ("ftell"); |
|
1
|
490 |
|
|
491 return retval; |
|
|
492 } |
|
|
493 |
|
1957
|
494 DEFUN (fprintf, args, , |
|
2116
|
495 "fprintf (FILENUM, FORMAT, ...)") |
|
1181
|
496 { |
|
2095
|
497 double retval = -1.0; |
|
1181
|
498 |
|
|
499 int nargin = args.length (); |
|
|
500 |
|
2095
|
501 if (nargin > 1) |
|
|
502 { |
|
|
503 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
|
504 |
|
|
505 if (os) |
|
|
506 { |
|
|
507 if (args(1).is_string ()) |
|
|
508 { |
|
|
509 string fmt = args(1).string_value (); |
|
|
510 |
|
|
511 octave_value_list tmp_args; |
|
|
512 |
|
|
513 if (nargin > 2) |
|
|
514 { |
|
|
515 tmp_args.resize (nargin-2, octave_value ()); |
|
|
516 |
|
|
517 for (int i = 2; i < nargin; i++) |
|
|
518 tmp_args(i-2) = args(i); |
|
|
519 } |
|
|
520 |
|
|
521 retval = os->printf (fmt, tmp_args); |
|
|
522 } |
|
|
523 else |
|
|
524 ::error ("fprintf: format must be a string"); |
|
|
525 } |
|
|
526 else |
|
|
527 gripe_invalid_file_id ("fprintf"); |
|
|
528 } |
|
|
529 else |
|
1181
|
530 print_usage ("fprintf"); |
|
|
531 |
|
|
532 return retval; |
|
|
533 } |
|
|
534 |
|
2095
|
535 DEFUN (fputs, args, , |
|
2116
|
536 "fputs (FILENUM, STRING)") |
|
1181
|
537 { |
|
2095
|
538 double retval = -1.0; |
|
1181
|
539 |
|
|
540 int nargin = args.length (); |
|
|
541 |
|
2095
|
542 if (nargin == 2) |
|
|
543 { |
|
|
544 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
1181
|
545 |
|
2095
|
546 if (os) |
|
|
547 retval = os->puts (args(1)); |
|
|
548 else |
|
|
549 gripe_invalid_file_id ("fputs"); |
|
|
550 } |
|
1181
|
551 else |
|
2095
|
552 print_usage ("fputs"); |
|
1181
|
553 |
|
|
554 return retval; |
|
|
555 } |
|
|
556 |
|
2095
|
557 DEFUN (sprintf, args, , |
|
|
558 "[s, errmsg, status] = sprintf (FORMAT, ...)") |
|
1
|
559 { |
|
2095
|
560 octave_value_list retval; |
|
1
|
561 |
|
2095
|
562 int nargin = args.length (); |
|
1
|
563 |
|
2095
|
564 if (nargin > 0) |
|
1
|
565 { |
|
2116
|
566 retval(2) = -1.0; |
|
|
567 retval(1) = "unknown error"; |
|
|
568 retval(0) = ""; |
|
|
569 |
|
2095
|
570 octave_ostrstream ostr; |
|
1
|
571 |
|
2148
|
572 octave_stream os (&ostr, true); |
|
628
|
573 |
|
2095
|
574 if (os) |
|
|
575 { |
|
|
576 if (args(0).is_string ()) |
|
|
577 { |
|
|
578 string fmt = args(0).string_value (); |
|
628
|
579 |
|
2095
|
580 octave_value_list tmp_args; |
|
1
|
581 |
|
2095
|
582 if (nargin > 1) |
|
|
583 { |
|
|
584 tmp_args.resize (nargin-1, octave_value ()); |
|
1
|
585 |
|
2095
|
586 for (int i = 1; i < nargin; i++) |
|
|
587 tmp_args(i-1) = args(i); |
|
|
588 } |
|
628
|
589 |
|
2095
|
590 retval(2) = os.printf (fmt, tmp_args); |
|
|
591 retval(1) = os.error (); |
|
|
592 char *tmp = ostr.str (); |
|
|
593 retval(0) = tmp; |
|
|
594 delete [] tmp; |
|
|
595 } |
|
|
596 else |
|
|
597 ::error ("sprintf: format must be a string"); |
|
|
598 } |
|
|
599 else |
|
|
600 ::error ("sprintf: unable to create output buffer"); |
|
1
|
601 } |
|
|
602 else |
|
2095
|
603 print_usage ("sprintf"); |
|
1
|
604 |
|
|
605 return retval; |
|
|
606 } |
|
|
607 |
|
2095
|
608 DEFUN (fscanf, args, , |
|
2122
|
609 "[A, COUNT] = fscanf (FILENUM, FORMAT [, SIZE])\n\ |
|
|
610 \n\ |
|
|
611 Read from FILENUM according to FORMAT, returning the result in the\n\ |
|
|
612 matrix A. SIZE is optional. If present, it can be one of\n\ |
|
|
613 \n\ |
|
|
614 Inf : read as much as possible, returning a column vector\n\ |
|
|
615 (unless doing all character conversions, in which case a\n\ |
|
|
616 string is returned)\n\ |
|
|
617 NR : read as much as possible, returning a matrix with NR rows\n\ |
|
|
618 [NR, NC] : read up to NR x NC elements, returning a matrix with NR rows\n\ |
|
|
619 [NR, Inf] : same as NR\n\ |
|
|
620 \n\ |
|
|
621 If it is omitted, a value of Inf is assumed.\n\ |
|
|
622 \n\ |
|
2215
|
623 The number of items successfully read is returned in COUNT.\n\ |
|
|
624 \n\ |
|
|
625 [A, B, ...] = fscanf (FILENUM, FORMAT, \"C\")\n\ |
|
|
626 \n\ |
|
|
627 Read from FILENUM according to FORMAT, with each conversion specifier\n\ |
|
|
628 in FORMAT corresponding to a single scalar return value. This form is\n\ |
|
|
629 more `C-like', and also compatible with previous versions of Octave") |
|
1181
|
630 { |
|
2095
|
631 octave_value_list retval; |
|
1181
|
632 |
|
|
633 int nargin = args.length (); |
|
|
634 |
|
2215
|
635 if (nargin == 3 && args(2).is_string ()) |
|
2095
|
636 { |
|
|
637 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
1181
|
638 |
|
2095
|
639 if (os) |
|
|
640 { |
|
|
641 if (args(1).is_string ()) |
|
|
642 { |
|
|
643 string fmt = args(1).string_value (); |
|
1181
|
644 |
|
2215
|
645 retval = os->oscanf (fmt); |
|
2095
|
646 } |
|
|
647 else |
|
|
648 ::error ("fscanf: format must be a string"); |
|
|
649 } |
|
|
650 else |
|
|
651 gripe_invalid_file_id ("fscanf"); |
|
|
652 } |
|
1181
|
653 else |
|
2215
|
654 { |
|
|
655 retval (1) = 0.0; |
|
|
656 retval (0) = Matrix (); |
|
|
657 |
|
|
658 if (nargin == 2 || nargin == 3) |
|
|
659 { |
|
|
660 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
|
661 |
|
|
662 if (os) |
|
|
663 { |
|
|
664 if (args(1).is_string ()) |
|
|
665 { |
|
|
666 string fmt = args(1).string_value (); |
|
|
667 |
|
|
668 int count = 0; |
|
|
669 |
|
|
670 Matrix size = (nargin == 3) |
|
|
671 ? args(2).matrix_value () : Matrix (1, 1, octave_Inf); |
|
|
672 |
|
|
673 if (! error_state) |
|
|
674 { |
|
|
675 octave_value tmp = os->scanf (fmt, size, count); |
|
|
676 |
|
|
677 retval(1) = (double) count; |
|
|
678 retval(0) = tmp; |
|
|
679 } |
|
|
680 } |
|
|
681 else |
|
|
682 ::error ("fscanf: format must be a string"); |
|
|
683 } |
|
|
684 else |
|
|
685 gripe_invalid_file_id ("fscanf"); |
|
|
686 } |
|
|
687 else |
|
|
688 print_usage ("fscanf"); |
|
|
689 } |
|
1181
|
690 |
|
|
691 return retval; |
|
|
692 } |
|
|
693 |
|
2095
|
694 DEFUN (sscanf, args, , |
|
2122
|
695 "[A, COUNT, ERRMSG, INDEX] = sscanf (STRING, FORMAT, SIZE)\n\ |
|
|
696 \n\ |
|
2215
|
697 Read from STRING according to FORMAT, returning the result in the\n\ |
|
2122
|
698 matrix A. SIZE is optional. If present, it can be one of\n\ |
|
|
699 \n\ |
|
|
700 Inf : read as much as possible, returning a column vector\n\ |
|
|
701 (unless doing all character conversions, in which case a\n\ |
|
|
702 string is returned)\n\ |
|
|
703 NR : read as much as possible, returning a matrix with NR rows\n\ |
|
|
704 [NR, NC] : read up to NR x NC elements, returning a matrix with NR rows\n\ |
|
|
705 [NR, Inf] : same as NR\n\ |
|
|
706 \n\ |
|
|
707 If it is omitted, a value of Inf is assumed.\n\ |
|
|
708 \n\ |
|
|
709 The number of items successfully read is returned in COUNT. If an\n\ |
|
|
710 error occurs, ERRMSG contains the text of the corresponding error\n\ |
|
|
711 message. INDEX contains the index of the next character to be read\n\ |
|
2215
|
712 from STRING\n\ |
|
|
713 \n\ |
|
|
714 [A, B, ...] = sscanf (STRING, FORMAT, \"C\")\n\ |
|
|
715 \n\ |
|
|
716 Read from STRING according to FORMAT, with each conversion specifier\n\ |
|
|
717 in FORMAT corresponding to a single scalar return value. This form is\n\ |
|
|
718 more `C-like', and also compatible with previous versions of Octave") |
|
444
|
719 { |
|
2095
|
720 octave_value_list retval; |
|
444
|
721 |
|
506
|
722 int nargin = args.length (); |
|
|
723 |
|
2215
|
724 if (nargin == 3 && args(2).is_string ()) |
|
2095
|
725 { |
|
|
726 if (args(0).is_string ()) |
|
|
727 { |
|
|
728 string data = args(0).string_value (); |
|
444
|
729 |
|
2095
|
730 octave_istrstream istr (data); |
|
1358
|
731 |
|
2148
|
732 octave_stream os (&istr, true); |
|
636
|
733 |
|
2095
|
734 if (os) |
|
|
735 { |
|
|
736 if (args(1).is_string ()) |
|
|
737 { |
|
|
738 string fmt = args(1).string_value (); |
|
444
|
739 |
|
2215
|
740 retval = os.oscanf (fmt); |
|
2095
|
741 } |
|
|
742 else |
|
|
743 ::error ("sscanf: format must be a string"); |
|
|
744 } |
|
|
745 else |
|
|
746 ::error ("sscanf: unable to create temporary input buffer"); |
|
444
|
747 } |
|
636
|
748 else |
|
2095
|
749 ::error ("sscanf: first argument must be a string"); |
|
444
|
750 } |
|
|
751 else |
|
2215
|
752 { |
|
|
753 if (nargin == 2 || nargin == 3) |
|
|
754 { |
|
|
755 retval(3) = -1.0; |
|
|
756 retval(2) = "unknown error"; |
|
|
757 retval(1) = 0.0; |
|
|
758 retval(0) = Matrix (); |
|
|
759 |
|
|
760 if (args(0).is_string ()) |
|
|
761 { |
|
|
762 string data = args(0).string_value (); |
|
|
763 |
|
|
764 octave_istrstream istr (data); |
|
|
765 |
|
|
766 octave_stream os (&istr, true); |
|
|
767 |
|
|
768 if (os) |
|
|
769 { |
|
|
770 if (args(1).is_string ()) |
|
|
771 { |
|
|
772 string fmt = args(1).string_value (); |
|
|
773 |
|
|
774 int count = 0; |
|
|
775 |
|
|
776 Matrix size = (nargin == 3) |
|
|
777 ? args(2).matrix_value () : Matrix (1, 1, octave_Inf); |
|
|
778 |
|
|
779 octave_value tmp = os.scanf (fmt, size, count); |
|
|
780 |
|
|
781 // XXX FIXME XXX -- is this the right thing to do? |
|
|
782 // Extract error message first, because getting |
|
|
783 // position will clear it. |
|
|
784 string errmsg = os.error (); |
|
|
785 |
|
|
786 retval(3) = (double) (os.tell () + 1); |
|
|
787 retval(2) = errmsg; |
|
|
788 retval(1) = (double) count; |
|
|
789 retval(0) = tmp; |
|
|
790 } |
|
|
791 else |
|
|
792 ::error ("sscanf: format must be a string"); |
|
|
793 } |
|
|
794 else |
|
|
795 ::error ("sscanf: unable to create temporary input buffer"); |
|
|
796 } |
|
|
797 else |
|
|
798 ::error ("sscanf: first argument must be a string"); |
|
|
799 } |
|
|
800 else |
|
|
801 print_usage ("sscanf"); |
|
|
802 } |
|
444
|
803 |
|
|
804 return retval; |
|
|
805 } |
|
|
806 |
|
2215
|
807 DEFUN (scanf, args, nargout, |
|
|
808 "scanf (FORMAT) is equivalent to fscanf (stdin, FORMAT)") |
|
|
809 { |
|
|
810 int nargin = args.length (); |
|
|
811 |
|
|
812 octave_value_list tmp_args (nargin+1, octave_value ()); |
|
|
813 |
|
|
814 tmp_args (0) = 0.0; |
|
|
815 for (int i = 0; i < nargin; i++) |
|
|
816 tmp_args (i+1) = args (i); |
|
|
817 |
|
|
818 return Ffscanf (tmp_args, nargout); |
|
|
819 } |
|
|
820 |
|
2116
|
821 static octave_value |
|
|
822 do_fread (octave_stream& os, const octave_value& size_arg, |
|
|
823 const octave_value& prec_arg, const octave_value& skip_arg, |
|
|
824 const octave_value& arch_arg, int& count) |
|
|
825 { |
|
|
826 octave_value retval; |
|
|
827 |
|
|
828 count = -1; |
|
|
829 |
|
|
830 Matrix size = size_arg.matrix_value (); |
|
|
831 |
|
|
832 if (! error_state) |
|
|
833 { |
|
|
834 string prec = prec_arg.string_value (); |
|
|
835 |
|
|
836 if (! error_state) |
|
|
837 { |
|
2318
|
838 oct_data_conv::data_type dt |
|
|
839 = oct_data_conv::string_to_data_type (prec); |
|
2116
|
840 |
|
|
841 if (! error_state) |
|
|
842 { |
|
|
843 double dskip = skip_arg.double_value (); |
|
|
844 |
|
|
845 if (! error_state) |
|
|
846 { |
|
|
847 if (D_NINT (dskip) == dskip) |
|
|
848 { |
|
|
849 int skip = NINT (dskip); |
|
|
850 |
|
|
851 string arch = arch_arg.string_value (); |
|
|
852 |
|
|
853 if (! error_state) |
|
|
854 { |
|
2318
|
855 oct_mach_info::float_format flt_fmt |
|
|
856 = oct_mach_info::string_to_float_format (arch); |
|
2116
|
857 |
|
|
858 if (! error_state) |
|
2318
|
859 retval = os.read (size, dt, skip, flt_fmt, count); |
|
2116
|
860 } |
|
|
861 else |
|
|
862 ::error ("fread: architecture type must be a string"); |
|
|
863 } |
|
|
864 else |
|
|
865 ::error ("fread: skip must be an integer"); |
|
|
866 } |
|
|
867 else |
|
|
868 ::error ("fread: invalid skip specified"); |
|
|
869 } |
|
|
870 else |
|
|
871 ::error ("fread: invalid data type specified"); |
|
|
872 } |
|
|
873 else |
|
|
874 ::error ("fread: precision must be a string"); |
|
|
875 } |
|
|
876 else |
|
|
877 ::error ("fread: invalid size specified"); |
|
|
878 |
|
|
879 return retval; |
|
|
880 } |
|
|
881 |
|
|
882 DEFUN (fread, args, , |
|
|
883 "[DATA, COUNT] = fread (FILENUM [, SIZE] [, PRECISION] [, SKIP] [, ARCH])\n\ |
|
529
|
884 \n\ |
|
2318
|
885 Reads data in binary form of type PRECISION from a file.\n\ |
|
|
886 \n\ |
|
|
887 FILENUM : file number from fopen\n\ |
|
529
|
888 \n\ |
|
2318
|
889 SIZE : size specification for the data matrix\n\ |
|
|
890 \n\ |
|
|
891 PRECISION : string specifying type of data to read, valid types are\n\ |
|
529
|
892 \n\ |
|
2318
|
893 char, char*1, integer*1, int8 -- character\n\ |
|
|
894 schar, signed char -- signed character\n\ |
|
|
895 uchar, unsigned char -- unsigned character (default)\n\ |
|
|
896 short -- short integer\n\ |
|
|
897 ushort, unsigned short -- unsigned short integer\n\ |
|
|
898 int -- integer\n\ |
|
|
899 uint, unsigned int -- unsigned integer\n\ |
|
|
900 long -- long integer\n\ |
|
|
901 ulong, unsigned long -- unsigned long integer\n\ |
|
|
902 float, float32, real*4 -- single precision float\n\ |
|
|
903 double, float64, real*8 -- double precision float\n\ |
|
|
904 int16, integer*2 -- two byte integer\n\ |
|
|
905 int32, integer*4 -- four byte integer\n\ |
|
|
906 \n\ |
|
|
907 SKIP : number of bytes to skip before each element is read\n\ |
|
|
908 (default is 0)\n\ |
|
529
|
909 \n\ |
|
2318
|
910 ARCH : string specifying the data format for the file. Valid |
|
|
911 values are\n\ |
|
|
912 \n\ |
|
|
913 native -- the format of the current machine (default)\n\ |
|
|
914 ieee-le -- IEEE big endian\n\ |
|
|
915 ieee-be -- IEEE little endian\n\ |
|
|
916 vaxd -- VAX D floating format\n\ |
|
|
917 vaxg -- VAX G floating format\n\ |
|
2324
|
918 cray -- Cray floating format\n\ |
|
2318
|
919 \n\ |
|
2324
|
920 however, conversions are currently only supported for\n\ |
|
|
921 ieee-be, and ieee-le formats.\n\ |
|
2318
|
922 \n\ |
|
|
923 \n\ |
|
|
924 DATA : matrix in which the data is stored\n\ |
|
|
925 \n\ |
|
|
926 COUNT : number of elements read") |
|
529
|
927 { |
|
2095
|
928 octave_value_list retval; |
|
2116
|
929 |
|
|
930 int nargin = args.length (); |
|
|
931 |
|
2318
|
932 if (nargin > 0 && nargin < 6) |
|
2116
|
933 { |
|
|
934 retval(1) = -1.0; |
|
|
935 retval(0) = Matrix (); |
|
|
936 |
|
|
937 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
|
938 |
|
|
939 if (os) |
|
|
940 { |
|
|
941 octave_value size = (nargin > 1) |
|
|
942 ? args(1) : octave_value (octave_Inf); |
|
|
943 |
|
|
944 octave_value prec = (nargin > 2) |
|
|
945 ? args(2) : octave_value ("uchar"); |
|
|
946 |
|
|
947 octave_value skip = (nargin > 3) |
|
|
948 ? args(3) : octave_value (0.0); |
|
|
949 |
|
|
950 octave_value arch = (nargin > 4) |
|
2318
|
951 ? args(4) : octave_value ("unknown"); |
|
2116
|
952 |
|
|
953 int count = -1; |
|
|
954 |
|
|
955 octave_value tmp = do_fread (*os, size, prec, skip, arch, count); |
|
|
956 |
|
|
957 retval(1) = (double) count; |
|
|
958 retval(0) = tmp; |
|
|
959 } |
|
|
960 else |
|
|
961 gripe_invalid_file_id ("fread"); |
|
|
962 } |
|
|
963 else |
|
|
964 print_usage ("fread"); |
|
|
965 |
|
529
|
966 return retval; |
|
|
967 } |
|
|
968 |
|
2116
|
969 static int |
|
|
970 do_fwrite (octave_stream& os, const octave_value& data, |
|
|
971 const octave_value& prec_arg, const octave_value& skip_arg, |
|
|
972 const octave_value& arch_arg) |
|
|
973 { |
|
|
974 int retval = -1; |
|
|
975 |
|
|
976 string prec = prec_arg.string_value (); |
|
|
977 |
|
|
978 if (! error_state) |
|
|
979 { |
|
2318
|
980 oct_data_conv::data_type dt |
|
|
981 = oct_data_conv::string_to_data_type (prec); |
|
2116
|
982 |
|
|
983 if (! error_state) |
|
|
984 { |
|
|
985 double dskip = skip_arg.double_value (); |
|
|
986 |
|
|
987 if (! error_state) |
|
|
988 { |
|
|
989 if (D_NINT (dskip) == dskip) |
|
|
990 { |
|
|
991 int skip = NINT (dskip); |
|
|
992 |
|
|
993 string arch = arch_arg.string_value (); |
|
|
994 |
|
|
995 if (! error_state) |
|
|
996 { |
|
2318
|
997 oct_mach_info::float_format flt_fmt |
|
|
998 = oct_mach_info::string_to_float_format (arch); |
|
2116
|
999 |
|
|
1000 if (! error_state) |
|
2318
|
1001 retval = os.write (data, dt, skip, flt_fmt); |
|
2116
|
1002 } |
|
|
1003 else |
|
|
1004 ::error ("fwrite: architecture type must be a string"); |
|
|
1005 } |
|
|
1006 else |
|
|
1007 ::error ("fwrite: skip must be an integer"); |
|
|
1008 } |
|
|
1009 else |
|
|
1010 ::error ("fwrite: invalid skip specified"); |
|
|
1011 } |
|
|
1012 } |
|
|
1013 else |
|
|
1014 ::error ("fwrite: precision must be a string"); |
|
|
1015 |
|
|
1016 return retval; |
|
|
1017 } |
|
|
1018 |
|
|
1019 DEFUN (fwrite, args, , |
|
|
1020 "COUNT = fwrite (FILENUM, DATA [, PRECISION] [, SKIP] [, ARCH])\n\ |
|
1181
|
1021 \n\ |
|
2318
|
1022 Writes data to a file in binary form of size PRECISION\n\ |
|
|
1023 \n\ |
|
|
1024 FILENUM : file number from fopen\n\ |
|
|
1025 \n\ |
|
|
1026 DATA : matrix of elements to be written\n\ |
|
|
1027 \n\ |
|
|
1028 PRECISION : string specifying type of data to read, valid types are\n\ |
|
1181
|
1029 \n\ |
|
2318
|
1030 char, char*1, integer*1, int8 -- character\n\ |
|
|
1031 schar, signed char -- signed character\n\ |
|
|
1032 uchar, unsigned char -- unsigned character (default)\n\ |
|
|
1033 short -- short integer\n\ |
|
|
1034 ushort, unsigned short -- unsigned short integer\n\ |
|
|
1035 int -- integer\n\ |
|
|
1036 uint, unsigned int -- unsigned integer\n\ |
|
|
1037 long -- long integer\n\ |
|
|
1038 ulong, unsigned long -- unsigned long integer\n\ |
|
|
1039 float, float32, real*4 -- single precision float\n\ |
|
|
1040 double, float64, real*8 -- double precision float\n\ |
|
|
1041 int16, integer*2 -- two byte integer\n\ |
|
|
1042 int32, integer*4 -- four byte integer\n\ |
|
1181
|
1043 \n\ |
|
2318
|
1044 SKIP : number of bytes to skip before each element is read\n\ |
|
|
1045 (the default is 0)\n\ |
|
|
1046 \n\ |
|
|
1047 ARCH : string specifying the data format for the file. Valid |
|
|
1048 values are\n\ |
|
1181
|
1049 \n\ |
|
2318
|
1050 native -- the format of the current machine (default)\n\ |
|
|
1051 ieee-le -- IEEE big endian\n\ |
|
|
1052 ieee-be -- IEEE little endian\n\ |
|
|
1053 vaxd -- VAX D floating format\n\ |
|
|
1054 vaxg -- VAX G floating format\n\ |
|
|
1055 cray -- Cray floating format\n |
|
|
1056 \n\ |
|
|
1057 however, conversions are currently only supported for ieee-be, and\n\ |
|
|
1058 ieee-le formats.\n\ |
|
|
1059 \n\ |
|
|
1060 \n\ |
|
|
1061 COUNT : number of elements written") |
|
1181
|
1062 { |
|
2116
|
1063 octave_value retval = -1.0; |
|
|
1064 |
|
|
1065 int nargin = args.length (); |
|
|
1066 |
|
|
1067 if (nargin > 1 && nargin < 6) |
|
|
1068 { |
|
|
1069 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
|
1070 |
|
|
1071 if (os) |
|
|
1072 { |
|
|
1073 octave_value data = args(1); |
|
2318
|
1074 |
|
|
1075 octave_value prec = (nargin > 2) |
|
|
1076 ? args(2) : octave_value ("uchar"); |
|
|
1077 |
|
|
1078 octave_value skip = (nargin > 3) |
|
|
1079 ? args(3) : octave_value (0.0); |
|
|
1080 |
|
|
1081 octave_value arch = (nargin > 4) |
|
|
1082 ? args(4) : octave_value ("unknown"); |
|
2116
|
1083 |
|
|
1084 retval = do_fwrite (*os, data, prec, skip, arch); |
|
|
1085 } |
|
|
1086 else |
|
|
1087 gripe_invalid_file_id ("fwrite"); |
|
|
1088 } |
|
|
1089 else |
|
|
1090 print_usage ("fwrite"); |
|
|
1091 |
|
1181
|
1092 return retval; |
|
|
1093 } |
|
|
1094 |
|
1957
|
1095 DEFUN (feof, args, , |
|
2116
|
1096 "ERROR = feof (FILENUM)\n\ |
|
529
|
1097 \n\ |
|
|
1098 Returns a non zero value for an end of file condition for the\n\ |
|
2116
|
1099 file specified by FILENUM from fopen") |
|
529
|
1100 { |
|
2095
|
1101 double retval = -1.0; |
|
529
|
1102 |
|
|
1103 int nargin = args.length (); |
|
|
1104 |
|
2095
|
1105 if (nargin == 1) |
|
|
1106 { |
|
|
1107 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
444
|
1108 |
|
2095
|
1109 if (os) |
|
|
1110 retval = os->eof () ? 1.0 : 0.0; |
|
|
1111 else |
|
|
1112 gripe_invalid_file_id ("feof"); |
|
|
1113 } |
|
529
|
1114 else |
|
2095
|
1115 print_usage ("feof"); |
|
444
|
1116 |
|
|
1117 return retval; |
|
|
1118 } |
|
|
1119 |
|
2095
|
1120 DEFUN (ferror, args, , |
|
2116
|
1121 "ERROR = ferror (FILENUM, [\"clear\"])\n\ |
|
2095
|
1122 \n\ |
|
|
1123 Returns a non zero value for an error condition on the\n\ |
|
2116
|
1124 file specified by FILENUM from fopen") |
|
1230
|
1125 { |
|
2095
|
1126 octave_value_list retval; |
|
1230
|
1127 |
|
2095
|
1128 int nargin = args.length (); |
|
1230
|
1129 |
|
2095
|
1130 if (nargin == 1 || nargin == 2) |
|
|
1131 { |
|
|
1132 octave_stream *os = octave_stream_list::lookup (args(0)); |
|
1230
|
1133 |
|
2095
|
1134 if (os) |
|
|
1135 { |
|
|
1136 bool clear = false; |
|
1230
|
1137 |
|
2095
|
1138 if (nargin == 2) |
|
|
1139 { |
|
|
1140 string opt = args(1).string_value (); |
|
|
1141 |
|
|
1142 if (! error_state) |
|
|
1143 clear = (opt == "clear"); |
|
|
1144 else |
|
|
1145 return retval; |
|
|
1146 } |
|
1755
|
1147 |
|
2095
|
1148 int error_number = 0; |
|
|
1149 |
|
|
1150 string error_message = os->error (clear, error_number); |
|
1230
|
1151 |
|
2095
|
1152 retval(1) = (double) error_number; |
|
|
1153 retval(0) = error_message; |
|
|
1154 } |
|
|
1155 else |
|
|
1156 gripe_invalid_file_id ("ferror"); |
|
1230
|
1157 } |
|
2095
|
1158 else |
|
|
1159 print_usage ("ferror"); |
|
1230
|
1160 |
|
|
1161 return retval; |
|
|
1162 } |
|
|
1163 |
|
1957
|
1164 DEFUN (popen, args, , |
|
1230
|
1165 "FILENUM = popen (FILENAME, MODE)\n\ |
|
|
1166 \n\ |
|
|
1167 start a process and create a pipe. Valid values for mode are:\n\ |
|
|
1168 \n\ |
|
|
1169 \"r\" : connect stdout of process to pipe\n\ |
|
|
1170 \"w\" : connect stdin of process to pipe") |
|
|
1171 { |
|
2095
|
1172 double retval = -1.0; |
|
1230
|
1173 |
|
|
1174 int nargin = args.length (); |
|
|
1175 |
|
2095
|
1176 if (nargin == 2) |
|
|
1177 { |
|
|
1178 string name = args(0).string_value (); |
|
1230
|
1179 |
|
2095
|
1180 if (! error_state) |
|
|
1181 { |
|
|
1182 string mode = args(1).string_value (); |
|
1230
|
1183 |
|
2095
|
1184 if (! error_state) |
|
|
1185 { |
|
|
1186 if (mode == "r") |
|
|
1187 { |
|
|
1188 octave_iprocstream *ips = new octave_iprocstream (name); |
|
1230
|
1189 |
|
2095
|
1190 retval = octave_stream_list::insert (ips); |
|
|
1191 } |
|
|
1192 else if (mode == "w") |
|
|
1193 { |
|
|
1194 octave_oprocstream *ops = new octave_oprocstream (name); |
|
1230
|
1195 |
|
2095
|
1196 retval = octave_stream_list::insert (ops); |
|
|
1197 } |
|
|
1198 else |
|
|
1199 ::error ("popen: invalid mode specified"); |
|
|
1200 } |
|
|
1201 else |
|
|
1202 ::error ("popen: mode must be a string"); |
|
|
1203 } |
|
|
1204 else |
|
|
1205 ::error ("popen: name must be a string"); |
|
|
1206 } |
|
1230
|
1207 else |
|
2095
|
1208 print_usage ("popen"); |
|
1230
|
1209 |
|
|
1210 return retval; |
|
|
1211 } |
|
|
1212 |
|
1957
|
1213 DEFUN (pclose, args, , |
|
2116
|
1214 "pclose (FILENUM)\n\ |
|
1230
|
1215 \n\ |
|
|
1216 Close a pipe and terminate the associated process") |
|
|
1217 { |
|
2095
|
1218 double retval = -1.0; |
|
1230
|
1219 |
|
|
1220 int nargin = args.length (); |
|
|
1221 |
|
2095
|
1222 if (nargin == 1) |
|
1230
|
1223 { |
|
2095
|
1224 retval = (double) octave_stream_list::remove (args(0)); |
|
1230
|
1225 |
|
2095
|
1226 if (retval < 0) |
|
|
1227 gripe_invalid_file_id ("pclose"); |
|
1377
|
1228 } |
|
|
1229 else |
|
2095
|
1230 print_usage ("pclose"); |
|
1379
|
1231 |
|
|
1232 return retval; |
|
|
1233 } |
|
|
1234 |
|
2458
|
1235 DEFUN (tmpnam, args, , |
|
|
1236 "tmpnam ()\n\ |
|
2237
|
1237 Return unique temporary file name.") |
|
1802
|
1238 { |
|
2095
|
1239 octave_value retval; |
|
1802
|
1240 |
|
|
1241 if (args.length () == 0) |
|
|
1242 retval = oct_tempnam (); |
|
|
1243 else |
|
2458
|
1244 print_usage ("tmpnam"); |
|
1802
|
1245 |
|
|
1246 return retval; |
|
|
1247 } |
|
|
1248 |
|
2458
|
1249 DEFALIAS (octave_tmp_file_name, tmpnam); |
|
|
1250 |
|
1400
|
1251 static int |
|
|
1252 convert (int x, int ibase, int obase) |
|
|
1253 { |
|
|
1254 int retval = 0; |
|
|
1255 |
|
|
1256 int tmp = x % obase; |
|
|
1257 |
|
|
1258 if (tmp > ibase - 1) |
|
2095
|
1259 ::error ("umask: invalid digit"); |
|
1400
|
1260 else |
|
|
1261 { |
|
|
1262 retval = tmp; |
|
|
1263 int mult = ibase; |
|
|
1264 while ((x = (x - tmp) / obase)) |
|
|
1265 { |
|
|
1266 tmp = x % obase; |
|
|
1267 if (tmp > ibase - 1) |
|
|
1268 { |
|
2095
|
1269 ::error ("umask: invalid digit"); |
|
1400
|
1270 break; |
|
|
1271 } |
|
|
1272 retval += mult * tmp; |
|
|
1273 mult *= ibase; |
|
|
1274 } |
|
|
1275 } |
|
|
1276 |
|
|
1277 return retval; |
|
|
1278 } |
|
|
1279 |
|
1957
|
1280 DEFUN (umask, args, , |
|
1400
|
1281 "umask (MASK)\n\ |
|
|
1282 \n\ |
|
|
1283 Change the file permission mask for file creation for the current |
|
|
1284 process. MASK is an integer, interpreted as an octal number. If |
|
|
1285 successful, returns the previous value of the mask (as an integer to |
|
|
1286 be interpreted as an octal number); otherwise an error message is |
|
|
1287 printed.") |
|
|
1288 { |
|
2095
|
1289 octave_value_list retval; |
|
1400
|
1290 |
|
|
1291 int status = 0; |
|
|
1292 |
|
|
1293 if (args.length () == 1) |
|
|
1294 { |
|
|
1295 double dmask = args(0).double_value (); |
|
|
1296 |
|
|
1297 if (error_state) |
|
|
1298 { |
|
|
1299 status = -1; |
|
2095
|
1300 ::error ("umask: expecting integer argument"); |
|
1400
|
1301 } |
|
|
1302 else |
|
|
1303 { |
|
|
1304 int mask = NINT (dmask); |
|
|
1305 |
|
|
1306 if ((double) mask != dmask || mask < 0) |
|
|
1307 { |
|
|
1308 status = -1; |
|
2095
|
1309 ::error ("umask: MASK must be a positive integer value"); |
|
1400
|
1310 } |
|
|
1311 else |
|
|
1312 { |
|
|
1313 int oct_mask = convert (mask, 8, 10); |
|
|
1314 |
|
|
1315 if (! error_state) |
|
1773
|
1316 status = convert (oct_umask (oct_mask), 10, 8); |
|
1400
|
1317 } |
|
|
1318 } |
|
|
1319 } |
|
|
1320 else |
|
|
1321 print_usage ("umask"); |
|
|
1322 |
|
|
1323 if (status >= 0) |
|
|
1324 retval(0) = (double) status; |
|
|
1325 |
|
|
1326 return retval; |
|
|
1327 } |
|
|
1328 |
|
2189
|
1329 void |
|
|
1330 symbols_of_file_io (void) |
|
|
1331 { |
|
2341
|
1332 // NOTE: the values of SEEK_SET, SEEK_CUR, and SEEK_END have to be |
|
|
1333 // this way for Matlab compatibility. |
|
|
1334 |
|
|
1335 DEFCONST (SEEK_SET, -1.0, 0, 0, |
|
2189
|
1336 "used with fseek to position file relative to the beginning"); |
|
|
1337 |
|
2341
|
1338 DEFCONST (SEEK_CUR, 0.0, 0, 0, |
|
2189
|
1339 "used with fseek to position file relative to the current position"); |
|
|
1340 |
|
2341
|
1341 DEFCONST (SEEK_END, 1.0, 0, 0, |
|
2189
|
1342 "used with fseek to position file relative to the end"); |
|
|
1343 |
|
|
1344 DEFCONSTX ("stdin", SBV_stdin, 0.0, 0, 0, |
|
|
1345 "file number of the standard input stream"); |
|
|
1346 |
|
|
1347 DEFCONSTX ("stdout", SBV_stdout, 1.0, 0, 0, |
|
|
1348 "file number of the standard output stream"); |
|
|
1349 |
|
|
1350 DEFCONSTX ("stderr", SBV_stderr, 2.0, 0, 0, |
|
|
1351 "file number of the standard error stream"); |
|
|
1352 } |
|
|
1353 |
|
444
|
1354 /* |
|
1
|
1355 ;;; Local Variables: *** |
|
|
1356 ;;; mode: C++ *** |
|
|
1357 ;;; End: *** |
|
|
1358 */ |
