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