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1
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1 // file-io.cc -*- C++ -*- |
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2 /* |
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3 |
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1009
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4 Copyright (C) 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 // Written by John C. Campbell <jcc@che.utexas.edu>. |
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1230
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25 // |
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26 // Thomas Baier <baier@ci.tuwien.ac.at> added the following functions: |
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27 // |
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28 // popen pclose execute sync_system async_system |
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29 // waitpid mkfifo unlink |
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30 |
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31 |
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240
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32 #ifdef HAVE_CONFIG_H |
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1230
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33 #include <config.h> |
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34 #endif |
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35 |
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1343
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36 #include <cstring> |
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37 #include <cstdio> |
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38 #include <cerrno> |
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39 #include <cstdlib> |
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40 #include <cctype> |
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41 |
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1350
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42 #include <strstream.h> |
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43 |
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44 #ifdef HAVE_UNISTD_H |
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1230
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45 #include <sys/types.h> |
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46 #include <unistd.h> |
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1343
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47 #endif |
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48 |
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1230
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49 #include <fcntl.h> |
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50 |
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1230
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51 #include <DLList.h> |
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52 |
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456
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53 #include "dMatrix.h" |
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444
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54 |
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1352
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55 #include "defun.h" |
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1
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56 #include "error.h" |
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1352
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57 #include "file-io.h" |
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542
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58 #include "help.h" |
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1352
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59 #include "input.h" |
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60 #include "mappers.h" |
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61 #include "octave-hist.h" |
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1
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62 #include "pager.h" |
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1352
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63 #include "statdefs.h" |
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444
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64 #include "sysdep.h" |
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1352
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65 #include "syswait.h" |
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66 #include "tree-const.h" |
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67 #include "utils.h" |
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529
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68 #include "variables.h" |
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69 |
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70 // keeps a count of args sent to printf or scanf |
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71 static int fmt_arg_count = 0; |
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72 |
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759
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73 // double linked list containing relevant information about open files |
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74 static DLList <file_info> file_list; |
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1
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75 |
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240
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76 file_info::file_info (void) |
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1
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77 { |
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334
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78 file_number = -1; |
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529
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79 file_name = 0; |
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80 file_fptr = 0; |
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81 file_mode = 0; |
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1
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82 } |
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83 |
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240
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84 file_info::file_info (int n, const char *nm, FILE *t, const char *md) |
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85 { |
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334
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86 file_number = n; |
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87 file_name = strsave (nm); |
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88 file_fptr = t; |
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89 file_mode = strsave (md); |
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240
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90 } |
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91 |
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92 file_info::file_info (const file_info& f) |
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1
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93 { |
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367
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94 file_number = f.file_number; |
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95 file_name = strsave (f.file_name); |
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96 file_fptr = f.file_fptr; |
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97 file_mode = strsave (f.file_mode); |
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1
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98 } |
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99 |
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240
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100 file_info& |
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101 file_info::operator = (const file_info& f) |
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1
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102 { |
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240
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103 if (this != & f) |
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104 { |
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367
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105 file_number = f.file_number; |
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334
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106 delete [] file_name; |
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107 file_name = strsave (f.file_name); |
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108 file_fptr = f.file_fptr; |
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109 delete [] file_mode; |
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110 file_mode = strsave (f.file_mode); |
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240
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111 } |
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1
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112 return *this; |
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113 } |
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114 |
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240
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115 file_info::~file_info (void) |
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1
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116 { |
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334
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117 delete [] file_name; |
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118 delete [] file_mode; |
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1
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119 } |
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120 |
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121 int |
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240
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122 file_info::number (void) const |
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1
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123 { |
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334
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124 return file_number; |
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1
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125 } |
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126 |
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240
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127 const char * |
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128 file_info::name (void) const |
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1
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129 { |
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334
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130 return file_name; |
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1
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131 } |
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132 |
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133 FILE * |
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240
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134 file_info::fptr (void) const |
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1
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135 { |
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334
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136 return file_fptr; |
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1
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137 } |
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138 |
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240
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139 const char * |
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140 file_info::mode (void) const |
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1
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141 { |
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334
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142 return file_mode; |
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1
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143 } |
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144 |
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145 void |
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164
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146 initialize_file_io (void) |
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1
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147 { |
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334
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148 file_info octave_stdin (0, "stdin", stdin, "r"); |
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149 file_info octave_stdout (1, "stdout", stdout, "w"); |
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150 file_info octave_stderr (2, "stderr", stderr, "w"); |
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1
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151 |
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334
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152 file_list.append (octave_stdin); |
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153 file_list.append (octave_stdout); |
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154 file_list.append (octave_stderr); |
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1
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155 } |
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156 |
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761
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157 // Given a file name or number, return a pointer to the corresponding |
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158 // open file. If the file has not already been opened, return NULL. |
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159 |
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1
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160 Pix |
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164
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161 return_valid_file (const tree_constant& arg) |
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1
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162 { |
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610
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163 if (arg.is_string ()) |
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1
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164 { |
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165 Pix p = file_list.first (); |
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240
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166 file_info file; |
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896
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167 int file_count = file_list.length (); |
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1
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168 for (int i = 0; i < file_count; i++) |
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169 { |
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170 char *file_name = arg.string_value (); |
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171 file = file_list (p); |
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172 if (strcmp (file.name (), file_name) == 0) |
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173 return p; |
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174 file_list.next (p); |
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175 } |
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176 } |
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636
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177 else |
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1
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178 { |
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179 double file_num = arg.double_value (); |
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636
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180 |
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181 if (! error_state) |
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1
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182 { |
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1086
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183 if (D_NINT (file_num) != file_num) |
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636
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184 error ("file number not an integer value"); |
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185 else |
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1
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186 { |
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636
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187 Pix p = file_list.first (); |
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188 file_info file; |
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896
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189 int file_count = file_list.length (); |
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636
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190 for (int i = 0; i < file_count; i++) |
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191 { |
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192 file = file_list (p); |
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193 if (file.number () == file_num) |
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194 return p; |
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195 file_list.next (p); |
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196 } |
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197 error ("no file with that number"); |
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1
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198 } |
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199 } |
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636
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200 else |
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201 error ("inapproriate file specifier"); |
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202 } |
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1
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203 |
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529
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204 return 0; |
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1
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205 } |
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206 |
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207 static Pix |
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636
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208 fopen_file_for_user (const char *name, const char *mode, |
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370
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209 const char *warn_for) |
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1
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210 { |
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636
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211 FILE *file_ptr = fopen (name, mode); |
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529
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212 if (file_ptr) |
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1
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213 { |
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896
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214 int file_number = file_list.length () + 1; |
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215 |
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216 file_info file (file_number, name, file_ptr, mode); |
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1
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217 file_list.append (file); |
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218 |
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219 Pix p = file_list.first (); |
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240
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220 file_info file_from_list; |
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896
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221 int file_count = file_list.length (); |
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1
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222 for (int i = 0; i < file_count; i++) |
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223 { |
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224 file_from_list = file_list (p); |
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636
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225 if (strcmp (file_from_list.name (), name) == 0) |
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1
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226 return p; |
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227 file_list.next (p); |
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228 } |
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229 } |
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230 |
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636
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231 error ("%s: unable to open file `%s'", warn_for, name); |
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240
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232 |
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529
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233 return 0; |
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1
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234 } |
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235 |
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368
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236 static Pix |
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636
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237 file_io_get_file (const tree_constant& arg, const char *mode, |
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368
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238 const char *warn_for) |
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239 { |
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240 Pix p = return_valid_file (arg); |
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241 |
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529
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242 if (! p) |
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368
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243 { |
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610
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244 if (arg.is_string ()) |
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368
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245 { |
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246 char *name = arg.string_value (); |
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247 |
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248 struct stat buffer; |
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249 int status = stat (name, &buffer); |
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250 |
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372
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251 if (status == 0) |
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368
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252 { |
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253 if ((buffer.st_mode & S_IFREG) == S_IFREG) |
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636
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254 p = fopen_file_for_user (name, mode, warn_for); |
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368
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255 else |
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256 error ("%s: invalid file type", warn_for); |
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257 } |
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372
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258 else if (status < 0 && *mode != 'r') |
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636
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259 p = fopen_file_for_user (name, mode, warn_for); |
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368
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260 else |
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261 error ("%s: can't stat file `%s'", warn_for, name); |
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262 } |
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263 else |
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264 error ("%s: invalid file specifier", warn_for); |
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265 } |
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266 |
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267 return p; |
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268 } |
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1
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269 |
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1181
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270 static Octave_object |
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497
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271 fclose_internal (const Octave_object& args) |
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1
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272 { |
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497
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273 Octave_object retval; |
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1
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274 |
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712
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275 Pix p = return_valid_file (args(0)); |
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1
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276 |
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529
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277 if (! p) |
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1
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278 return retval; |
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279 |
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240
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280 file_info file = file_list (p); |
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1
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281 |
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282 if (file.number () < 3) |
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283 { |
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284 warning ("fclose: can't close stdin, stdout, or stderr!"); |
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285 return retval; |
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286 } |
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287 |
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288 int success = fclose (file.fptr ()); |
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289 file_list.del (p); |
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290 |
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291 if (success == 0) |
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636
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292 retval(0) = 1.0; // succeeded |
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1
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293 else |
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294 { |
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295 error ("fclose: error on closing file"); |
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636
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296 retval(0) = 0.0; // failed |
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1
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297 } |
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298 |
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299 return retval; |
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300 } |
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301 |
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1181
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302 DEFUN ("fclose", Ffclose, Sfclose, 1, 1, |
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303 "fclose (FILENAME or FILENUM): close a file") |
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529
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304 { |
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305 Octave_object retval; |
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306 |
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307 int nargin = args.length (); |
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308 |
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712
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309 if (nargin != 1) |
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1181
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310 print_usage ("fclose"); |
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529
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311 else |
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1181
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312 retval = fclose_internal (args); |
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529
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313 |
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314 return retval; |
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315 } |
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316 |
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1181
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317 static Octave_object |
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497
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318 fflush_internal (const Octave_object& args) |
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1
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319 { |
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497
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320 Octave_object retval; |
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1
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321 |
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712
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322 Pix p = return_valid_file (args(0)); |
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1
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323 |
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529
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324 if (! p) |
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1
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325 return retval; |
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326 |
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240
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327 file_info file = file_list (p); |
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1
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328 |
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329 if (strcmp (file.mode (), "r") == 0) |
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330 { |
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331 warning ("can't flush an input stream"); |
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332 return retval; |
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333 } |
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334 |
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335 int success = 0; |
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240
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336 |
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1
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337 if (file.number () == 1) |
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338 flush_output_to_pager (); |
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339 else |
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340 success = fflush (file.fptr ()); |
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341 |
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342 if (success == 0) |
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636
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343 retval(0) = 1.0; // succeeded |
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1
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344 else |
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345 { |
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346 error ("fflush: write error"); |
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636
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347 retval(0) = 0.0; // failed |
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1
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348 } |
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349 |
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350 return retval; |
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351 } |
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352 |
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1181
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353 DEFUN ("fflush", Ffflush, Sfflush, 1, 1, |
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354 "fflush (FILENAME or FILENUM): flush buffered data to output file") |
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355 { |
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356 Octave_object retval; |
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357 |
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358 int nargin = args.length (); |
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359 |
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360 if (nargin != 1) |
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361 print_usage ("fflush"); |
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362 else |
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363 retval = fflush_internal (args); |
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364 |
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365 return retval; |
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366 } |
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367 |
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1
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368 static int |
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164
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369 valid_mode (const char *mode) |
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1
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370 { |
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529
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371 if (mode) |
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1
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372 { |
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373 char m = mode[0]; |
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374 if (m == 'r' || m == 'w' || m == 'a') |
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375 { |
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376 m = mode[1]; |
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377 return (m == '\0' || (m == '+' && mode[2] == '\0')); |
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378 } |
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379 } |
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380 return 0; |
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381 } |
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382 |
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1181
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383 static Octave_object |
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1339
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384 fgets_internal (const Octave_object& args, int nargin, int nargout, |
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385 int strip_final_newline = 0) |
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1
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386 { |
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497
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387 Octave_object retval; |
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1
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388 |
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712
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389 Pix p = file_io_get_file (args(0), "r", "fgets"); |
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1
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390 |
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529
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391 if (! p) |
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368
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392 return retval; |
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393 |
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1339
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394 int length = 0; |
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1338
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395 |
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396 if (nargin == 2) |
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1
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397 { |
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1338
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398 double dlen = args(1).double_value (); |
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399 |
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400 if (error_state) |
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401 return retval; |
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402 |
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403 if (xisnan (dlen)) |
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404 { |
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405 error ("fgets: NaN invalid as length"); |
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406 return retval; |
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407 } |
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408 |
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1339
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409 length = NINT (dlen); |
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1338
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410 |
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411 if ((double) length != dlen) |
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412 { |
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413 error ("fgets: length not an integer value"); |
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414 return retval; |
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415 } |
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416 |
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1339
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417 if (length < 0) |
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418 { |
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419 error ("fgets: length must be a nonnegative integer"); |
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420 return retval; |
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421 } |
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1
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422 } |
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1339
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423 |
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424 file_info file = file_list (p); |
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425 FILE *fileptr = file.fptr (); |
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426 |
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427 ostrstream buf; |
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428 int c; |
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429 int count = 0; |
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430 int newline_stripped = 0; |
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431 |
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432 if (nargin == 1 || length > 0) |
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1
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433 { |
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1339
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434 while ((c = fgetc (fileptr)) != EOF) |
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1338
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435 { |
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1339
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436 count++; |
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1338
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437 if (c == '\n') |
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438 { |
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1339
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439 if (! strip_final_newline) |
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440 buf << (char) c; |
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441 else |
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442 newline_stripped = 1; |
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443 |
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1338
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444 break; |
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445 } |
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1339
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446 else |
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447 buf << (char) c; |
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448 |
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449 if (nargin == 2 && count == length) |
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450 break; |
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1338
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451 } |
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1
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452 } |
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1339
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453 |
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454 buf << ends; |
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455 char *string = buf.str (); |
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456 |
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457 if (count) |
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1338
|
458 { |
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459 if (nargout == 2) |
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1339
|
460 retval(1) = (double) (count - newline_stripped); |
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1338
|
461 |
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462 retval(0) = string; |
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|
463 } |
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464 else |
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465 retval(0) = -1.0; |
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466 |
|
|
467 delete [] string; |
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1
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468 |
|
|
469 return retval; |
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|
470 } |
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|
471 |
|
1339
|
472 DEFUN ("fgetl", Ffgetl, Sfgetl, 2, 2, |
|
|
473 "[STRING, LENGTH] = fgetl (FILENAME or FILENUM [, LENGTH])\n\ |
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|
474 \n\ |
|
|
475 read a string from a file") |
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|
476 { |
|
|
477 Octave_object retval; |
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|
478 |
|
|
479 int nargin = args.length (); |
|
|
480 |
|
|
481 if (nargin == 1 || nargin == 2) |
|
|
482 retval = fgets_internal (args, nargin, nargout, 1); |
|
|
483 else |
|
|
484 print_usage ("fgetl"); |
|
|
485 |
|
|
486 return retval; |
|
|
487 } |
|
|
488 |
|
1181
|
489 DEFUN ("fgets", Ffgets, Sfgets, 2, 2, |
|
1339
|
490 "[STRING, LENGTH] = fgets (FILENAME or FILENUM [, LENGTH])\n\ |
|
529
|
491 \n\ |
|
1181
|
492 read a string from a file") |
|
529
|
493 { |
|
|
494 Octave_object retval; |
|
|
495 |
|
|
496 int nargin = args.length (); |
|
|
497 |
|
1338
|
498 if (nargin == 1 || nargin == 2) |
|
|
499 retval = fgets_internal (args, nargin, nargout); |
|
|
500 else |
|
1181
|
501 print_usage ("fgets"); |
|
529
|
502 |
|
|
503 return retval; |
|
|
504 } |
|
|
505 |
|
1181
|
506 static Octave_object |
|
497
|
507 fopen_internal (const Octave_object& args) |
|
1
|
508 { |
|
497
|
509 Octave_object retval; |
|
1
|
510 Pix p; |
|
|
511 |
|
712
|
512 if (! args(0).is_string ()) |
|
1
|
513 { |
|
|
514 error ("fopen: file name must be a string"); |
|
|
515 return retval; |
|
|
516 } |
|
|
517 |
|
712
|
518 p = return_valid_file (args(0)); |
|
1
|
519 |
|
529
|
520 if (p) |
|
1
|
521 { |
|
240
|
522 file_info file = file_list (p); |
|
1
|
523 |
|
636
|
524 retval(0) = (double) file.number (); |
|
1
|
525 |
|
|
526 return retval; |
|
|
527 } |
|
|
528 |
|
712
|
529 if (! args(1).is_string ()) |
|
1
|
530 { |
|
370
|
531 error ("fopen: file mode must be a string"); |
|
1
|
532 return retval; |
|
|
533 } |
|
|
534 |
|
712
|
535 char *name = args(0).string_value (); |
|
|
536 char *mode = args(1).string_value (); |
|
1
|
537 |
|
|
538 if (! valid_mode (mode)) |
|
|
539 { |
|
|
540 error ("fopen: invalid mode"); |
|
|
541 return retval; |
|
|
542 } |
|
|
543 |
|
|
544 struct stat buffer; |
|
|
545 if (stat (name, &buffer) == 0 && (buffer.st_mode & S_IFDIR) == S_IFDIR) |
|
|
546 { |
|
|
547 error ("fopen: can't open directory"); |
|
|
548 return retval; |
|
|
549 } |
|
|
550 |
|
|
551 FILE *file_ptr = fopen (name, mode); |
|
|
552 |
|
529
|
553 if (! file_ptr) |
|
1
|
554 { |
|
370
|
555 error ("fopen: unable to open file `%s'", name); |
|
1
|
556 return retval; |
|
|
557 } |
|
|
558 |
|
896
|
559 int file_number = file_list.length () + 1; |
|
1
|
560 |
|
896
|
561 file_info file (file_number, name, file_ptr, mode); |
|
1
|
562 file_list.append (file); |
|
|
563 |
|
896
|
564 retval(0) = (double) file_number; |
|
1
|
565 |
|
|
566 return retval; |
|
|
567 } |
|
|
568 |
|
1181
|
569 DEFUN ("fopen", Ffopen, Sfopen, 2, 1, |
|
|
570 "FILENUM = fopen (FILENAME, MODE): open a file\n\ |
|
|
571 \n\ |
|
|
572 Valid values for mode include:\n\ |
|
|
573 \n\ |
|
|
574 r : open text file for reading\n\ |
|
|
575 w : open text file for writing; discard previous contents if any\n\ |
|
|
576 a : append; open or create text file for writing at end of file\n\ |
|
|
577 r+ : open text file for update (i.e., reading and writing)\n\ |
|
|
578 w+ : create text file for update; discard previous contents if any\n\ |
|
|
579 a+ : append; open or create text file for update, writing at end\n\n\ |
|
|
580 Update mode permits reading from and writing to the same file.") |
|
529
|
581 { |
|
|
582 Octave_object retval; |
|
|
583 |
|
|
584 int nargin = args.length (); |
|
|
585 |
|
1181
|
586 if (nargin != 2) |
|
|
587 print_usage ("fopen"); |
|
|
588 else |
|
|
589 retval = fopen_internal (args); |
|
529
|
590 |
|
|
591 return retval; |
|
|
592 } |
|
|
593 |
|
1181
|
594 static Octave_object |
|
164
|
595 freport_internal (void) |
|
1
|
596 { |
|
497
|
597 Octave_object retval; |
|
1
|
598 Pix p = file_list.first (); |
|
|
599 |
|
|
600 ostrstream output_buf; |
|
|
601 |
|
|
602 output_buf << "\n number mode name\n\n"; |
|
896
|
603 |
|
|
604 int file_count = file_list.length (); |
|
1
|
605 for (int i = 0; i < file_count; i++) |
|
|
606 { |
|
240
|
607 file_info file = file_list (p); |
|
1
|
608 output_buf.form ("%7d%6s %s\n", file.number (), file.mode (), |
|
|
609 file.name ()); |
|
|
610 file_list.next (p); |
|
|
611 } |
|
|
612 |
|
|
613 output_buf << "\n" << ends; |
|
|
614 maybe_page_output (output_buf); |
|
|
615 |
|
|
616 return retval; |
|
|
617 } |
|
|
618 |
|
1181
|
619 DEFUN ("freport", Ffreport, Sfreport, 0, 1, |
|
|
620 "freport (): list open files and their status") |
|
|
621 { |
|
|
622 Octave_object retval; |
|
|
623 |
|
|
624 int nargin = args.length (); |
|
|
625 |
|
|
626 if (nargin > 0) |
|
|
627 warning ("freport: ignoring extra arguments"); |
|
|
628 |
|
|
629 retval = freport_internal (); |
|
|
630 |
|
|
631 return retval; |
|
|
632 } |
|
|
633 |
|
|
634 static Octave_object |
|
|
635 frewind_internal (const Octave_object& args) |
|
|
636 { |
|
|
637 Octave_object retval; |
|
|
638 |
|
|
639 Pix p = file_io_get_file (args(0), "a+", "frewind"); |
|
|
640 |
|
|
641 if (p) |
|
|
642 { |
|
|
643 file_info file = file_list (p); |
|
|
644 rewind (file.fptr ()); |
|
|
645 } |
|
|
646 |
|
|
647 return retval; |
|
|
648 } |
|
|
649 |
|
712
|
650 DEFUN ("frewind", Ffrewind, Sfrewind, 1, 1, |
|
529
|
651 "frewind (FILENAME or FILENUM): set file position at beginning of file") |
|
|
652 { |
|
|
653 Octave_object retval; |
|
|
654 |
|
|
655 int nargin = args.length (); |
|
|
656 |
|
712
|
657 if (nargin != 1) |
|
529
|
658 print_usage ("frewind"); |
|
|
659 else |
|
|
660 retval = frewind_internal (args); |
|
|
661 |
|
|
662 return retval; |
|
|
663 } |
|
|
664 |
|
1181
|
665 static Octave_object |
|
506
|
666 fseek_internal (const Octave_object& args) |
|
1
|
667 { |
|
497
|
668 Octave_object retval; |
|
1
|
669 |
|
506
|
670 int nargin = args.length (); |
|
|
671 |
|
712
|
672 Pix p = file_io_get_file (args(0), "a+", "fseek"); |
|
1
|
673 |
|
529
|
674 if (! p) |
|
368
|
675 return retval; |
|
1
|
676 |
|
|
677 long origin = SEEK_SET; |
|
636
|
678 |
|
712
|
679 double doff = args(1).double_value (); |
|
636
|
680 |
|
|
681 if (error_state) |
|
|
682 return retval; |
|
|
683 |
|
1086
|
684 if (xisnan (doff)) |
|
|
685 { |
|
|
686 error ("fseek: NaN invalid as offset"); |
|
|
687 return retval; |
|
|
688 } |
|
|
689 |
|
636
|
690 long offset = NINT (doff); |
|
|
691 |
|
|
692 if ((double) offset != doff) |
|
1
|
693 { |
|
636
|
694 error ("fseek: offset not an integer value"); |
|
|
695 return retval; |
|
|
696 } |
|
|
697 |
|
712
|
698 if (nargin == 3) |
|
636
|
699 { |
|
712
|
700 double dorig = args(2).double_value (); |
|
636
|
701 |
|
|
702 if (error_state) |
|
|
703 return retval; |
|
|
704 |
|
1086
|
705 if (xisnan (dorig)) |
|
|
706 { |
|
|
707 error ("fseek: NaN invalid as origin"); |
|
|
708 return retval; |
|
|
709 } |
|
|
710 |
|
636
|
711 origin = NINT (dorig); |
|
|
712 |
|
|
713 if ((double) dorig != origin) |
|
1
|
714 { |
|
636
|
715 error ("fseek: origin not an integer value"); |
|
1
|
716 return retval; |
|
|
717 } |
|
|
718 |
|
763
|
719 if (origin == 0) |
|
|
720 origin = SEEK_SET; |
|
|
721 else if (origin == 1) |
|
1
|
722 origin = SEEK_CUR; |
|
763
|
723 else if (origin == 2) |
|
1
|
724 origin = SEEK_END; |
|
|
725 else |
|
|
726 { |
|
636
|
727 error ("fseek: invalid value for origin"); |
|
|
728 return retval; |
|
1
|
729 } |
|
|
730 } |
|
|
731 |
|
240
|
732 file_info file = file_list (p); |
|
1
|
733 int success = fseek (file.fptr (), offset, origin); |
|
|
734 |
|
|
735 if (success == 0) |
|
636
|
736 retval(0) = 1.0; // succeeded |
|
1
|
737 else |
|
|
738 { |
|
|
739 error ("fseek: file error"); |
|
636
|
740 retval(0) = 0.0; // failed |
|
1
|
741 } |
|
|
742 |
|
|
743 return retval; |
|
|
744 } |
|
|
745 |
|
1181
|
746 DEFUN ("fseek", Ffseek, Sfseek, 3, 1, |
|
|
747 "fseek (FILENAME or FILENUM, OFFSET [, ORIGIN])\n\ |
|
|
748 \n\ |
|
|
749 set file position for reading or writing") |
|
529
|
750 { |
|
|
751 Octave_object retval; |
|
|
752 |
|
|
753 int nargin = args.length (); |
|
|
754 |
|
1181
|
755 if (nargin != 2 && nargin != 3) |
|
|
756 print_usage ("fseek"); |
|
529
|
757 else |
|
1181
|
758 retval = fseek_internal (args); |
|
529
|
759 |
|
|
760 return retval; |
|
|
761 } |
|
|
762 |
|
1181
|
763 // Tell current position of file. |
|
|
764 |
|
|
765 static Octave_object |
|
497
|
766 ftell_internal (const Octave_object& args) |
|
1
|
767 { |
|
497
|
768 Octave_object retval; |
|
1
|
769 |
|
712
|
770 Pix p = file_io_get_file (args(0), "a+", "ftell"); |
|
1
|
771 |
|
529
|
772 if (p) |
|
368
|
773 { |
|
|
774 file_info file = file_list (p); |
|
|
775 long offset = ftell (file.fptr ()); |
|
636
|
776 |
|
|
777 retval(0) = (double) offset; |
|
1
|
778 |
|
368
|
779 if (offset == -1L) |
|
|
780 error ("ftell: write error"); |
|
|
781 } |
|
1
|
782 |
|
|
783 return retval; |
|
|
784 } |
|
|
785 |
|
1181
|
786 DEFUN ("ftell", Fftell, Sftell, 1, 1, |
|
|
787 "POSITION = ftell (FILENAME or FILENUM): returns the current file position") |
|
|
788 { |
|
|
789 Octave_object retval; |
|
|
790 |
|
|
791 int nargin = args.length (); |
|
|
792 |
|
|
793 if (nargin != 1) |
|
|
794 print_usage ("ftell"); |
|
|
795 else |
|
|
796 retval = ftell_internal (args); |
|
|
797 |
|
|
798 return retval; |
|
|
799 } |
|
|
800 |
|
1
|
801 void |
|
164
|
802 close_files (void) |
|
1
|
803 { |
|
|
804 Pix p = file_list.first (); |
|
|
805 |
|
896
|
806 int file_count = file_list.length (); |
|
1
|
807 for (int i = 0; i < file_count; i++) |
|
|
808 { |
|
896
|
809 if (p) |
|
1
|
810 { |
|
896
|
811 file_info file = file_list (p); |
|
|
812 |
|
|
813 if (i > 2) // do not close stdin, stdout, stderr! |
|
|
814 { |
|
|
815 int success = fclose (file.fptr ()); |
|
|
816 if (success != 0) |
|
|
817 error ("closing %s", file.name ()); |
|
|
818 } |
|
|
819 |
|
|
820 file_list.del (p); |
|
1
|
821 } |
|
896
|
822 else |
|
|
823 { |
|
|
824 error ("inconsistent state for internal file list!"); |
|
|
825 break; |
|
|
826 } |
|
1
|
827 } |
|
|
828 } |
|
|
829 |
|
|
830 static int |
|
497
|
831 process_printf_format (const char *s, const Octave_object& args, |
|
506
|
832 ostrstream& sb, const char *type) |
|
1
|
833 { |
|
|
834 ostrstream fmt; |
|
|
835 |
|
506
|
836 int nargin = args.length (); |
|
|
837 |
|
1
|
838 fmt << "%"; // do_printf() already blew past this one... |
|
|
839 |
|
|
840 int chars_from_fmt_str = 0; |
|
|
841 |
|
|
842 again: |
|
|
843 switch (*s) |
|
|
844 { |
|
|
845 case '+': case '-': case ' ': case '0': case '#': |
|
|
846 chars_from_fmt_str++; |
|
|
847 fmt << *s++; |
|
|
848 goto again; |
|
|
849 |
|
|
850 case '\0': |
|
|
851 goto invalid_format; |
|
|
852 |
|
|
853 default: |
|
|
854 break; |
|
|
855 } |
|
|
856 |
|
|
857 if (*s == '*') |
|
|
858 { |
|
712
|
859 if (fmt_arg_count > nargin) |
|
1
|
860 { |
|
218
|
861 error ("%s: not enough arguments", type); |
|
1
|
862 return -1; |
|
|
863 } |
|
|
864 |
|
636
|
865 double tmp_len = args(fmt_arg_count++).double_value (); |
|
|
866 |
|
1086
|
867 if (error_state || xisnan (tmp_len)) |
|
1
|
868 { |
|
218
|
869 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
870 return -1; |
|
|
871 } |
|
|
872 |
|
636
|
873 fmt << NINT (tmp_len); |
|
1
|
874 s++; |
|
|
875 chars_from_fmt_str++; |
|
|
876 } |
|
|
877 else |
|
|
878 { |
|
|
879 while (*s != '\0' && isdigit (*s)) |
|
|
880 { |
|
|
881 chars_from_fmt_str++; |
|
|
882 fmt << *s++; |
|
|
883 } |
|
|
884 } |
|
|
885 |
|
|
886 if (*s == '\0') |
|
|
887 goto invalid_format; |
|
|
888 |
|
|
889 if (*s == '.') |
|
|
890 { |
|
|
891 chars_from_fmt_str++; |
|
|
892 fmt << *s++; |
|
|
893 } |
|
|
894 |
|
|
895 if (*s == '*') |
|
|
896 { |
|
|
897 if (*(s-1) == '*') |
|
|
898 goto invalid_format; |
|
|
899 |
|
712
|
900 if (fmt_arg_count > nargin) |
|
1
|
901 { |
|
218
|
902 error ("%s: not enough arguments", type); |
|
1
|
903 return -1; |
|
|
904 } |
|
|
905 |
|
636
|
906 double tmp_len = args(fmt_arg_count++).double_value (); |
|
|
907 |
|
1086
|
908 if (error_state || xisnan (tmp_len)) |
|
1
|
909 { |
|
218
|
910 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
911 return -1; |
|
|
912 } |
|
|
913 |
|
636
|
914 fmt << NINT (tmp_len); |
|
1
|
915 s++; |
|
|
916 chars_from_fmt_str++; |
|
|
917 } |
|
|
918 else |
|
|
919 { |
|
|
920 while (*s != '\0' && isdigit (*s)) |
|
|
921 { |
|
|
922 chars_from_fmt_str++; |
|
|
923 fmt << *s++; |
|
|
924 } |
|
|
925 } |
|
|
926 |
|
|
927 if (*s == '\0') |
|
|
928 goto invalid_format; |
|
|
929 |
|
|
930 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
931 { |
|
|
932 chars_from_fmt_str++; |
|
|
933 fmt << *s++; |
|
|
934 } |
|
|
935 |
|
|
936 if (*s == '\0') |
|
|
937 goto invalid_format; |
|
|
938 |
|
712
|
939 if (fmt_arg_count > nargin) |
|
1
|
940 { |
|
218
|
941 error ("%s: not enough arguments", type); |
|
1
|
942 return -1; |
|
|
943 } |
|
|
944 |
|
|
945 switch (*s) |
|
|
946 { |
|
|
947 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
636
|
948 { |
|
|
949 double d = args(fmt_arg_count++).double_value (); |
|
1
|
950 |
|
1086
|
951 if (error_state || xisnan (d)) |
|
|
952 goto invalid_conversion; |
|
|
953 |
|
636
|
954 int val = NINT (d); |
|
|
955 |
|
1086
|
956 if ((double) val != d) |
|
636
|
957 goto invalid_conversion; |
|
|
958 else |
|
|
959 { |
|
|
960 chars_from_fmt_str++; |
|
|
961 fmt << *s << ends; |
|
|
962 char *tmp_fmt = fmt.str (); |
|
|
963 sb.form (tmp_fmt, val); |
|
|
964 delete [] tmp_fmt; |
|
|
965 return chars_from_fmt_str; |
|
|
966 } |
|
|
967 } |
|
1
|
968 |
|
|
969 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
636
|
970 { |
|
|
971 double val = args(fmt_arg_count++).double_value (); |
|
1
|
972 |
|
636
|
973 if (error_state) |
|
|
974 goto invalid_conversion; |
|
|
975 else |
|
|
976 { |
|
|
977 chars_from_fmt_str++; |
|
|
978 fmt << *s << ends; |
|
|
979 char *tmp_fmt = fmt.str (); |
|
|
980 sb.form (tmp_fmt, val); |
|
|
981 delete [] tmp_fmt; |
|
|
982 return chars_from_fmt_str; |
|
|
983 } |
|
|
984 } |
|
1
|
985 |
|
|
986 case 's': |
|
636
|
987 { |
|
|
988 char *val = args(fmt_arg_count++).string_value (); |
|
1
|
989 |
|
636
|
990 if (error_state) |
|
|
991 goto invalid_conversion; |
|
|
992 else |
|
|
993 { |
|
|
994 chars_from_fmt_str++; |
|
|
995 fmt << *s << ends; |
|
|
996 char *tmp_fmt = fmt.str (); |
|
|
997 sb.form (tmp_fmt, val); |
|
|
998 delete [] tmp_fmt; |
|
|
999 return chars_from_fmt_str; |
|
|
1000 } |
|
|
1001 } |
|
1
|
1002 |
|
|
1003 case 'c': |
|
636
|
1004 { |
|
|
1005 char *val = args(fmt_arg_count++).string_value (); |
|
1
|
1006 |
|
636
|
1007 if (error_state || strlen (val) != 1) |
|
|
1008 goto invalid_conversion; |
|
|
1009 else |
|
|
1010 { |
|
|
1011 chars_from_fmt_str++; |
|
|
1012 fmt << *s << ends; |
|
|
1013 char *tmp_fmt = fmt.str (); |
|
|
1014 sb.form (tmp_fmt, *val); |
|
|
1015 delete [] tmp_fmt; |
|
|
1016 return chars_from_fmt_str; |
|
|
1017 } |
|
|
1018 } |
|
1
|
1019 |
|
|
1020 default: |
|
|
1021 goto invalid_format; |
|
|
1022 } |
|
|
1023 |
|
|
1024 invalid_conversion: |
|
218
|
1025 error ("%s: invalid conversion", type); |
|
1
|
1026 return -1; |
|
|
1027 |
|
|
1028 invalid_format: |
|
218
|
1029 error ("%s: invalid format", type); |
|
1
|
1030 return -1; |
|
|
1031 } |
|
|
1032 |
|
761
|
1033 // Formatted printing to a file. |
|
1
|
1034 |
|
1181
|
1035 static Octave_object |
|
506
|
1036 do_printf (const char *type, const Octave_object& args, int nargout) |
|
1
|
1037 { |
|
497
|
1038 Octave_object retval; |
|
712
|
1039 fmt_arg_count = 0; |
|
1
|
1040 char *fmt; |
|
240
|
1041 file_info file; |
|
1
|
1042 |
|
|
1043 if (strcmp (type, "fprintf") == 0) |
|
|
1044 { |
|
712
|
1045 Pix p = file_io_get_file (args(0), "a+", type); |
|
368
|
1046 |
|
529
|
1047 if (! p) |
|
368
|
1048 return retval; |
|
1
|
1049 |
|
|
1050 file = file_list (p); |
|
368
|
1051 |
|
1
|
1052 if (file.mode () == "r") |
|
|
1053 { |
|
|
1054 error ("%s: file is read only", type); |
|
|
1055 return retval; |
|
|
1056 } |
|
368
|
1057 |
|
712
|
1058 fmt = args(1).string_value (); |
|
368
|
1059 |
|
636
|
1060 if (error_state) |
|
|
1061 { |
|
|
1062 error ("%s: format must be a string", type); |
|
|
1063 return retval; |
|
|
1064 } |
|
|
1065 |
|
|
1066 fmt_arg_count += 2; |
|
1
|
1067 } |
|
|
1068 else |
|
|
1069 { |
|
712
|
1070 fmt = args(0).string_value (); |
|
636
|
1071 |
|
|
1072 if (error_state) |
|
|
1073 { |
|
|
1074 error ("%s: invalid format string", type); |
|
|
1075 return retval; |
|
|
1076 } |
|
|
1077 |
|
|
1078 fmt_arg_count++; |
|
1
|
1079 } |
|
|
1080 |
|
|
1081 // Scan fmt for % escapes and print out the arguments. |
|
|
1082 |
|
|
1083 ostrstream output_buf; |
|
|
1084 |
|
|
1085 char *ptr = fmt; |
|
|
1086 |
|
|
1087 for (;;) |
|
|
1088 { |
|
|
1089 char c; |
|
|
1090 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1091 output_buf << c; |
|
|
1092 |
|
|
1093 if (c == '\0') |
|
|
1094 break; |
|
|
1095 |
|
|
1096 if (*ptr == '%') |
|
|
1097 { |
|
|
1098 ptr++; |
|
|
1099 output_buf << c; |
|
|
1100 continue; |
|
|
1101 } |
|
|
1102 |
|
|
1103 // We must be looking at a format specifier. Extract it or fail. |
|
|
1104 |
|
506
|
1105 int status = process_printf_format (ptr, args, output_buf, type); |
|
1
|
1106 |
|
|
1107 if (status < 0) |
|
|
1108 return retval; |
|
|
1109 |
|
|
1110 ptr += status; |
|
|
1111 } |
|
|
1112 |
|
|
1113 output_buf << ends; |
|
|
1114 if (strcmp (type, "printf") == 0 |
|
|
1115 || (strcmp (type, "fprintf") == 0 && file.number () == 1)) |
|
|
1116 { |
|
|
1117 maybe_page_output (output_buf); |
|
|
1118 } |
|
|
1119 else if (strcmp (type, "fprintf") == 0) |
|
|
1120 { |
|
|
1121 char *msg = output_buf.str (); |
|
|
1122 int success = fputs (msg, file.fptr ()); |
|
|
1123 if (success == EOF) |
|
218
|
1124 warning ("%s: unknown failure writing to file", type); |
|
1
|
1125 delete [] msg; |
|
|
1126 } |
|
|
1127 else if (strcmp (type, "sprintf") == 0) |
|
|
1128 { |
|
|
1129 char *msg = output_buf.str (); |
|
636
|
1130 retval(0) = msg; |
|
1
|
1131 delete [] msg; |
|
|
1132 } |
|
|
1133 |
|
|
1134 return retval; |
|
|
1135 } |
|
|
1136 |
|
1181
|
1137 DEFUN ("fprintf", Ffprintf, Sfprintf, -1, 1, |
|
|
1138 "fprintf (FILENAME or FILENUM, FORMAT, ...)") |
|
|
1139 { |
|
|
1140 Octave_object retval; |
|
|
1141 |
|
|
1142 int nargin = args.length (); |
|
|
1143 |
|
|
1144 if (nargin < 2) |
|
|
1145 print_usage ("fprintf"); |
|
|
1146 else |
|
|
1147 retval = do_printf ("fprintf", args, nargout); |
|
|
1148 |
|
|
1149 return retval; |
|
|
1150 } |
|
|
1151 |
|
|
1152 // Formatted printing. |
|
|
1153 |
|
|
1154 DEFUN ("printf", Fprintf, Sprintf, -1, 1, |
|
|
1155 "printf (FORMAT, ...)") |
|
|
1156 { |
|
|
1157 Octave_object retval; |
|
|
1158 |
|
|
1159 int nargin = args.length (); |
|
|
1160 |
|
|
1161 if (nargin < 1) |
|
|
1162 print_usage ("printf"); |
|
|
1163 else |
|
|
1164 retval = do_printf ("printf", args, nargout); |
|
|
1165 |
|
|
1166 return retval; |
|
|
1167 } |
|
|
1168 |
|
|
1169 // Formatted printing to a string. |
|
|
1170 |
|
|
1171 DEFUN ("sprintf", Fsprintf, Ssprintf, -1, 1, |
|
|
1172 "s = sprintf (FORMAT, ...)") |
|
|
1173 { |
|
|
1174 Octave_object retval; |
|
|
1175 |
|
|
1176 int nargin = args.length (); |
|
|
1177 |
|
|
1178 if (nargin < 1) |
|
|
1179 print_usage ("sprintf"); |
|
|
1180 else |
|
|
1181 retval = do_printf ("sprintf", args, nargout); |
|
|
1182 |
|
|
1183 return retval; |
|
|
1184 } |
|
|
1185 |
|
1
|
1186 static int |
|
368
|
1187 process_scanf_format (const char *s, ostrstream& fmt, |
|
|
1188 const char *type, int nargout, FILE* fptr, |
|
497
|
1189 Octave_object& values) |
|
1
|
1190 { |
|
|
1191 fmt << "%"; |
|
|
1192 |
|
|
1193 int chars_from_fmt_str = 0; |
|
|
1194 int store_value = 1; |
|
628
|
1195 int string_width = 0; |
|
1
|
1196 int success = 1; |
|
|
1197 |
|
|
1198 if (*s == '*') |
|
|
1199 { |
|
|
1200 store_value = 0; |
|
|
1201 s++; |
|
|
1202 chars_from_fmt_str++; |
|
|
1203 } |
|
|
1204 |
|
|
1205 if (isdigit (*s)) |
|
|
1206 { |
|
|
1207 ostrstream str_number; |
|
|
1208 while (*s != '\0' && isdigit (*s)) |
|
|
1209 { |
|
|
1210 chars_from_fmt_str++; |
|
|
1211 str_number << *s; |
|
|
1212 fmt << *s++; |
|
|
1213 } |
|
|
1214 str_number << ends; |
|
|
1215 char *number = str_number.str (); |
|
|
1216 string_width = atoi (number); |
|
|
1217 delete [] number; |
|
|
1218 } |
|
|
1219 |
|
|
1220 if (*s == '\0') |
|
|
1221 goto invalid_format; |
|
|
1222 |
|
|
1223 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
1224 { |
|
|
1225 chars_from_fmt_str++; |
|
|
1226 s++; |
|
|
1227 } |
|
|
1228 |
|
|
1229 if (*s == '\0') |
|
|
1230 goto invalid_format; |
|
|
1231 |
|
368
|
1232 // Even if we don't have a place to store them, attempt to convert |
|
|
1233 // everything specified by the format string. |
|
1
|
1234 |
|
712
|
1235 if (fmt_arg_count > (nargout ? nargout : 1)) |
|
368
|
1236 store_value = 0; |
|
1
|
1237 |
|
|
1238 switch (*s) |
|
|
1239 { |
|
|
1240 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
|
1241 { |
|
|
1242 chars_from_fmt_str++; |
|
|
1243 fmt << *s << ends; |
|
|
1244 int temp; |
|
|
1245 char *str = fmt.str (); |
|
|
1246 success = fscanf (fptr, str, &temp); |
|
|
1247 delete [] str; |
|
|
1248 if (success > 0 && store_value) |
|
636
|
1249 values(fmt_arg_count++) = (double) temp; |
|
1
|
1250 } |
|
|
1251 break; |
|
628
|
1252 |
|
1
|
1253 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
|
1254 { |
|
|
1255 chars_from_fmt_str++; |
|
|
1256 fmt << 'l' << *s << ends; |
|
|
1257 double temp; |
|
|
1258 char *str = fmt.str (); |
|
|
1259 success = fscanf (fptr, str, &temp); |
|
|
1260 delete [] str; |
|
|
1261 if (success > 0 && store_value) |
|
636
|
1262 values(fmt_arg_count++) = temp; |
|
1
|
1263 } |
|
|
1264 break; |
|
628
|
1265 |
|
1
|
1266 case 's': |
|
|
1267 { |
|
|
1268 if (string_width < 1) |
|
|
1269 { |
|
628
|
1270 // XXX FIXME XXX -- The code below is miscompiled on the Alpha with |
|
|
1271 // gcc 2.6.0, so that string_width is never incremented, even though |
|
|
1272 // reading the data works correctly. One fix is to use a fixed-size |
|
|
1273 // buffer... |
|
|
1274 // string_width = 8192; |
|
|
1275 |
|
1
|
1276 string_width = 0; |
|
|
1277 long original_position = ftell (fptr); |
|
628
|
1278 |
|
1
|
1279 int c; |
|
|
1280 |
|
636
|
1281 while ((c = getc (fptr)) != EOF && isspace (c)) |
|
1
|
1282 ; // Don't count leading whitespace. |
|
|
1283 |
|
|
1284 if (c != EOF) |
|
|
1285 string_width++; |
|
|
1286 |
|
|
1287 for (;;) |
|
|
1288 { |
|
|
1289 c = getc (fptr); |
|
636
|
1290 if (c != EOF && ! isspace (c)) |
|
1
|
1291 string_width++; |
|
|
1292 else |
|
|
1293 break; |
|
|
1294 } |
|
|
1295 |
|
|
1296 fseek (fptr, original_position, SEEK_SET); |
|
|
1297 } |
|
|
1298 chars_from_fmt_str++; |
|
636
|
1299 char temp [string_width+1]; |
|
1
|
1300 fmt << *s << ends; |
|
|
1301 char *str = fmt.str (); |
|
|
1302 success = fscanf (fptr, str, temp); |
|
|
1303 delete [] str; |
|
636
|
1304 temp[string_width] = '\0'; |
|
628
|
1305 if (success > 0 && store_value) |
|
636
|
1306 values(fmt_arg_count++) = temp; |
|
1
|
1307 } |
|
|
1308 break; |
|
628
|
1309 |
|
1
|
1310 case 'c': |
|
|
1311 { |
|
|
1312 if (string_width < 1) |
|
|
1313 string_width = 1; |
|
|
1314 chars_from_fmt_str++; |
|
636
|
1315 char temp [string_width+1]; |
|
1
|
1316 memset (temp, '\0', string_width+1); |
|
|
1317 fmt << *s << ends; |
|
|
1318 char *str = fmt.str (); |
|
|
1319 success = fscanf (fptr, str, temp); |
|
|
1320 delete [] str; |
|
|
1321 temp[string_width] = '\0'; |
|
|
1322 if (success > 0 && store_value) |
|
636
|
1323 values(fmt_arg_count++) = temp; |
|
1
|
1324 } |
|
|
1325 break; |
|
628
|
1326 |
|
1
|
1327 default: |
|
|
1328 goto invalid_format; |
|
|
1329 } |
|
|
1330 |
|
368
|
1331 if (success > 0) |
|
1
|
1332 return chars_from_fmt_str; |
|
368
|
1333 else if (success == 0) |
|
218
|
1334 warning ("%s: invalid conversion", type); |
|
1
|
1335 else if (success == EOF) |
|
|
1336 { |
|
|
1337 if (strcmp (type, "fscanf") == 0) |
|
218
|
1338 warning ("%s: end of file reached before final conversion", type); |
|
1
|
1339 else if (strcmp (type, "sscanf") == 0) |
|
218
|
1340 warning ("%s: end of string reached before final conversion", type); |
|
1
|
1341 else if (strcmp (type, "scanf") == 0) |
|
218
|
1342 warning ("%s: end of input reached before final conversion", type); |
|
1
|
1343 } |
|
|
1344 else |
|
|
1345 { |
|
|
1346 invalid_format: |
|
218
|
1347 warning ("%s: invalid format", type); |
|
1
|
1348 } |
|
|
1349 |
|
|
1350 return -1; |
|
|
1351 } |
|
|
1352 |
|
761
|
1353 // Formatted reading from a file. |
|
|
1354 |
|
1181
|
1355 static Octave_object |
|
506
|
1356 do_scanf (const char *type, const Octave_object& args, int nargout) |
|
1
|
1357 { |
|
497
|
1358 Octave_object retval; |
|
529
|
1359 char *scanf_fmt = 0; |
|
|
1360 char *tmp_file = 0; |
|
1
|
1361 int tmp_file_open = 0; |
|
529
|
1362 FILE *fptr = 0; |
|
240
|
1363 file_info file; |
|
1
|
1364 |
|
|
1365 fmt_arg_count = 0; |
|
|
1366 |
|
|
1367 if (strcmp (type, "scanf") != 0) |
|
|
1368 { |
|
712
|
1369 scanf_fmt = args(1).string_value (); |
|
636
|
1370 |
|
|
1371 if (error_state) |
|
1
|
1372 { |
|
|
1373 error ("%s: format must be a string", type); |
|
|
1374 return retval; |
|
|
1375 } |
|
|
1376 } |
|
|
1377 |
|
|
1378 int doing_fscanf = (strcmp (type, "fscanf") == 0); |
|
|
1379 |
|
|
1380 if (doing_fscanf) |
|
|
1381 { |
|
712
|
1382 Pix p = file_io_get_file (args(0), "r", type); |
|
368
|
1383 |
|
529
|
1384 if (! p) |
|
368
|
1385 return retval; |
|
1
|
1386 |
|
|
1387 file = file_list (p); |
|
|
1388 |
|
|
1389 if (strcmp (file.mode (), "w") == 0 || strcmp (file.mode (), "a") == 0) |
|
|
1390 { |
|
|
1391 error ("%s: this file is opened for writing only", type); |
|
|
1392 return retval; |
|
|
1393 } |
|
|
1394 |
|
|
1395 fptr = file.fptr (); |
|
|
1396 } |
|
|
1397 |
|
712
|
1398 if ((! fptr && args(0).is_string ()) |
|
368
|
1399 || (doing_fscanf && file.number () == 0)) |
|
1
|
1400 { |
|
|
1401 char *string; |
|
|
1402 |
|
|
1403 if (strcmp (type, "scanf") == 0) |
|
712
|
1404 scanf_fmt = args(0).string_value (); |
|
1
|
1405 |
|
|
1406 if (strcmp (type, "scanf") == 0 |
|
|
1407 || (doing_fscanf && file.number () == 0)) |
|
|
1408 { |
|
870
|
1409 // XXX FIXME XXX -- this should probably be possible for more than |
|
|
1410 // just stdin/stdout pairs, using a list of output streams to flush. |
|
|
1411 // The list could be created with a function like iostream's tie(). |
|
|
1412 |
|
|
1413 flush_output_to_pager (); |
|
|
1414 |
|
1
|
1415 string = gnu_readline (""); |
|
870
|
1416 |
|
1
|
1417 if (string && *string) |
|
|
1418 maybe_save_history (string); |
|
|
1419 } |
|
|
1420 else |
|
712
|
1421 string = args(0).string_value (); |
|
1
|
1422 |
|
637
|
1423 tmp_file = octave_tmp_file_name (); |
|
1
|
1424 |
|
|
1425 fptr = fopen (tmp_file, "w+"); |
|
529
|
1426 if (! fptr) |
|
1
|
1427 { |
|
|
1428 error ("%s: error opening temporary file", type); |
|
|
1429 return retval; |
|
|
1430 } |
|
|
1431 tmp_file_open = 1; |
|
|
1432 unlink (tmp_file); |
|
|
1433 |
|
529
|
1434 if (! string) |
|
776
|
1435 { |
|
|
1436 error ("%s: no string to scan", type); |
|
|
1437 return retval; |
|
|
1438 } |
|
1
|
1439 |
|
|
1440 int success = fputs (string, fptr); |
|
|
1441 fflush (fptr); |
|
|
1442 rewind (fptr); |
|
|
1443 |
|
|
1444 if (success < 0) |
|
|
1445 { |
|
|
1446 error ("%s: trouble writing temporary file", type); |
|
|
1447 fclose (fptr); |
|
|
1448 return retval; |
|
|
1449 } |
|
|
1450 } |
|
|
1451 else if (! doing_fscanf) |
|
|
1452 { |
|
|
1453 error ("%s: first argument must be a string", type); |
|
|
1454 return retval; |
|
|
1455 } |
|
|
1456 |
|
|
1457 // Scan scanf_fmt for % escapes and assign the arguments. |
|
|
1458 |
|
636
|
1459 retval.resize (nargout); |
|
1
|
1460 |
|
|
1461 char *ptr = scanf_fmt; |
|
|
1462 |
|
|
1463 for (;;) |
|
|
1464 { |
|
|
1465 ostrstream fmt; |
|
|
1466 char c; |
|
|
1467 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1468 fmt << c; |
|
|
1469 |
|
|
1470 if (c == '\0') |
|
|
1471 break; |
|
|
1472 |
|
|
1473 if (*ptr == '%') |
|
|
1474 { |
|
|
1475 ptr++; |
|
|
1476 fmt << c; |
|
|
1477 continue; |
|
|
1478 } |
|
|
1479 |
|
|
1480 // We must be looking at a format specifier. Extract it or fail. |
|
|
1481 |
|
368
|
1482 int status = process_scanf_format (ptr, fmt, type, nargout, |
|
|
1483 fptr, retval); |
|
1
|
1484 |
|
|
1485 if (status < 0) |
|
|
1486 { |
|
|
1487 if (fmt_arg_count == 0) |
|
497
|
1488 retval.resize (0); |
|
1
|
1489 break; |
|
|
1490 } |
|
|
1491 |
|
|
1492 ptr += status; |
|
|
1493 } |
|
|
1494 |
|
|
1495 if (tmp_file_open) |
|
|
1496 fclose (fptr); |
|
|
1497 |
|
|
1498 return retval; |
|
|
1499 } |
|
|
1500 |
|
1181
|
1501 DEFUN ("fscanf", Ffscanf, Sfscanf, 2, -1, |
|
|
1502 "[A, B, C, ...] = fscanf (FILENAME or FILENUM, FORMAT)") |
|
|
1503 { |
|
|
1504 Octave_object retval; |
|
|
1505 |
|
|
1506 int nargin = args.length (); |
|
|
1507 |
|
|
1508 if (nargin != 1 && nargin != 2) |
|
|
1509 print_usage ("fscanf"); |
|
|
1510 else |
|
|
1511 retval = do_scanf ("fscanf", args, nargout); |
|
|
1512 |
|
|
1513 return retval; |
|
|
1514 } |
|
|
1515 |
|
|
1516 // Formatted reading. |
|
|
1517 |
|
|
1518 DEFUN ("scanf", Fscanf, Sscanf, 1, -1, |
|
|
1519 "[A, B, C, ...] = scanf (FORMAT)") |
|
|
1520 { |
|
|
1521 Octave_object retval; |
|
|
1522 |
|
|
1523 int nargin = args.length (); |
|
|
1524 |
|
|
1525 if (nargin != 1) |
|
|
1526 print_usage ("scanf"); |
|
|
1527 else |
|
|
1528 retval = do_scanf ("scanf", args, nargout); |
|
|
1529 |
|
|
1530 return retval; |
|
|
1531 } |
|
|
1532 |
|
|
1533 // Formatted reading from a string. |
|
|
1534 |
|
|
1535 DEFUN ("sscanf", Fsscanf, Ssscanf, 2, -1, |
|
|
1536 "[A, B, C, ...] = sscanf (STRING, FORMAT)") |
|
|
1537 { |
|
|
1538 Octave_object retval; |
|
|
1539 |
|
|
1540 int nargin = args.length (); |
|
|
1541 |
|
|
1542 if (nargin != 2) |
|
|
1543 print_usage ("sscanf"); |
|
|
1544 else |
|
|
1545 retval = do_scanf ("sscanf", args, nargout); |
|
|
1546 |
|
|
1547 return retval; |
|
|
1548 } |
|
|
1549 |
|
761
|
1550 // Find out how many elements are left to read. |
|
|
1551 |
|
444
|
1552 static long |
|
471
|
1553 num_items_remaining (FILE *fptr, char *type) |
|
444
|
1554 { |
|
471
|
1555 size_t size; |
|
|
1556 |
|
|
1557 if (strcasecmp (type, "uchar") == 0) |
|
|
1558 size = sizeof (u_char); |
|
|
1559 else if (strcasecmp (type, "char") == 0) |
|
|
1560 size = sizeof (char); |
|
|
1561 else if (strcasecmp (type, "short") == 0) |
|
|
1562 size = sizeof (short); |
|
|
1563 else if (strcasecmp (type, "ushort") == 0) |
|
|
1564 size = sizeof (u_short); |
|
|
1565 else if (strcasecmp (type, "int") == 0) |
|
|
1566 size = sizeof (int); |
|
|
1567 else if (strcasecmp (type, "uint") == 0) |
|
|
1568 size = sizeof (u_int); |
|
|
1569 else if (strcasecmp (type, "long") == 0) |
|
|
1570 size = sizeof (long); |
|
|
1571 else if (strcasecmp (type, "ulong") == 0) |
|
|
1572 size = sizeof (u_long); |
|
|
1573 else if (strcasecmp (type, "float") == 0) |
|
|
1574 size = sizeof (float); |
|
|
1575 else if (strcasecmp (type, "double") == 0) |
|
|
1576 size = sizeof (double); |
|
|
1577 else |
|
|
1578 return 0; |
|
|
1579 |
|
444
|
1580 long curr_pos = ftell (fptr); |
|
|
1581 |
|
|
1582 fseek (fptr, 0, SEEK_END); |
|
|
1583 long end_of_file = ftell (fptr); |
|
|
1584 |
|
471
|
1585 fseek (fptr, curr_pos, SEEK_SET); |
|
444
|
1586 |
|
|
1587 long len = end_of_file - curr_pos; |
|
|
1588 |
|
471
|
1589 return len / size; |
|
444
|
1590 } |
|
|
1591 |
|
761
|
1592 // Read binary data from a file. |
|
|
1593 // |
|
|
1594 // [data, count] = fread (fid, size, 'precision') |
|
|
1595 // |
|
|
1596 // fid : the file id from fopen |
|
|
1597 // size : the size of the matrix or vector or scaler to read |
|
|
1598 // |
|
|
1599 // n : reads n elements of a column vector |
|
|
1600 // inf : reads to the end of file (default) |
|
|
1601 // [m, n] : reads enough elements to fill the matrix |
|
|
1602 // the number of columns can be inf |
|
|
1603 // |
|
|
1604 // precision : type of the element. Can be: |
|
|
1605 // |
|
|
1606 // char, uchar, schar, short, ushort, int, uint, |
|
|
1607 // long, ulong, float, double |
|
|
1608 // |
|
|
1609 // Default is uchar. |
|
|
1610 // |
|
|
1611 // data : output data |
|
|
1612 // count : number of elements read |
|
|
1613 |
|
1181
|
1614 static Octave_object |
|
506
|
1615 fread_internal (const Octave_object& args, int nargout) |
|
444
|
1616 { |
|
497
|
1617 Octave_object retval; |
|
444
|
1618 |
|
506
|
1619 int nargin = args.length (); |
|
|
1620 |
|
712
|
1621 Pix p = file_io_get_file (args(0), "r", "fread"); |
|
444
|
1622 |
|
529
|
1623 if (! p) |
|
444
|
1624 return retval; |
|
|
1625 |
|
|
1626 // Get type and number of bytes per element to read. |
|
|
1627 char *prec = "uchar"; |
|
712
|
1628 if (nargin > 2) |
|
444
|
1629 { |
|
712
|
1630 prec = args(2).string_value (); |
|
636
|
1631 |
|
|
1632 if (error_state) |
|
444
|
1633 { |
|
|
1634 error ("fread: precision must be a specified as a string"); |
|
|
1635 return retval; |
|
|
1636 } |
|
|
1637 } |
|
|
1638 |
|
471
|
1639 // Get file info. |
|
444
|
1640 |
|
|
1641 file_info file = file_list (p); |
|
471
|
1642 |
|
|
1643 FILE *fptr = file.fptr (); |
|
444
|
1644 |
|
|
1645 // Set up matrix to read into. If specified in arguments use that |
|
|
1646 // number, otherwise read everyting left in file. |
|
|
1647 |
|
471
|
1648 double dnr = 0.0; |
|
|
1649 double dnc = 0.0; |
|
|
1650 int nr; |
|
|
1651 int nc; |
|
444
|
1652 |
|
712
|
1653 if (nargin > 1) |
|
444
|
1654 { |
|
712
|
1655 if (args(1).is_scalar_type ()) |
|
444
|
1656 { |
|
712
|
1657 dnr = args(1).double_value (); |
|
636
|
1658 |
|
|
1659 if (error_state) |
|
|
1660 return retval; |
|
|
1661 |
|
471
|
1662 dnc = 1.0; |
|
444
|
1663 } |
|
636
|
1664 else |
|
444
|
1665 { |
|
712
|
1666 ColumnVector tmp = args(1).vector_value (); |
|
444
|
1667 |
|
636
|
1668 if (error_state || tmp.length () != 2) |
|
471
|
1669 { |
|
|
1670 error ("fread: invalid size specification\n"); |
|
|
1671 return retval; |
|
|
1672 } |
|
636
|
1673 |
|
|
1674 dnr = tmp.elem (0); |
|
|
1675 dnc = tmp.elem (1); |
|
471
|
1676 } |
|
|
1677 |
|
|
1678 if ((xisinf (dnr)) && (xisinf (dnc))) |
|
444
|
1679 { |
|
471
|
1680 error ("fread: number of rows and columns cannot both be infinite"); |
|
444
|
1681 return retval; |
|
|
1682 } |
|
|
1683 |
|
471
|
1684 if (xisinf (dnr)) |
|
|
1685 { |
|
1086
|
1686 if (xisnan (dnc)) |
|
|
1687 { |
|
|
1688 error ("fread: NaN invalid as the number of columns"); |
|
|
1689 return retval; |
|
|
1690 } |
|
|
1691 else |
|
|
1692 { |
|
|
1693 nc = NINT (dnc); |
|
|
1694 int n = num_items_remaining (fptr, prec); |
|
|
1695 nr = n / nc; |
|
|
1696 if (n > nr * nc) |
|
|
1697 nr++; |
|
|
1698 } |
|
471
|
1699 } |
|
|
1700 else if (xisinf (dnc)) |
|
|
1701 { |
|
1086
|
1702 if (xisnan (dnr)) |
|
|
1703 { |
|
|
1704 error ("fread: NaN invalid as the number of rows"); |
|
|
1705 return retval; |
|
|
1706 } |
|
|
1707 else |
|
|
1708 { |
|
|
1709 nr = NINT (dnr); |
|
|
1710 int n = num_items_remaining (fptr, prec); |
|
|
1711 nc = n / nr; |
|
|
1712 if (n > nc * nr) |
|
|
1713 nc++; |
|
|
1714 } |
|
471
|
1715 } |
|
|
1716 else |
|
|
1717 { |
|
1086
|
1718 if (xisnan (dnr)) |
|
|
1719 { |
|
|
1720 error ("fread: NaN invalid as the number of rows"); |
|
|
1721 return retval; |
|
|
1722 } |
|
|
1723 else |
|
|
1724 nr = NINT (dnr); |
|
|
1725 |
|
|
1726 if (xisnan (dnc)) |
|
|
1727 { |
|
|
1728 error ("fread: NaN invalid as the number of columns"); |
|
|
1729 return retval; |
|
|
1730 } |
|
|
1731 else |
|
|
1732 nc = NINT (dnc); |
|
471
|
1733 } |
|
444
|
1734 } |
|
|
1735 else |
|
|
1736 { |
|
|
1737 // No size parameter, read what's left of the file. |
|
471
|
1738 nc = 1; |
|
|
1739 int n = num_items_remaining (fptr, prec); |
|
|
1740 nr = n / nc; |
|
|
1741 if (n > nr * nc) |
|
|
1742 nr++; |
|
444
|
1743 } |
|
|
1744 |
|
|
1745 Matrix m (nr, nc, octave_NaN); |
|
|
1746 |
|
|
1747 // Read data. |
|
|
1748 |
|
471
|
1749 int count = m.read (fptr, prec); |
|
444
|
1750 |
|
|
1751 if (nargout > 1) |
|
636
|
1752 retval(1) = (double) count; |
|
444
|
1753 |
|
636
|
1754 retval(0) = m; |
|
444
|
1755 |
|
|
1756 return retval; |
|
|
1757 } |
|
|
1758 |
|
1181
|
1759 DEFUN ("fread", Ffread, Sfread, 3, 2, |
|
|
1760 "[DATA, COUNT] = fread (FILENUM, SIZE, PRECISION)\n\ |
|
529
|
1761 \n\ |
|
1181
|
1762 Reads data in binary form of type PRECISION from a file.\n\ |
|
529
|
1763 \n\ |
|
|
1764 FILENUM : file number from fopen\n\ |
|
1181
|
1765 SIZE : size specification for the Data matrix\n\ |
|
529
|
1766 PRECISION : type of data to read, valid types are\n\ |
|
|
1767 \n\ |
|
1230
|
1768 \"char\" \"schar\" \"short\" \"int\" \"long\" \"float\"\n\ |
|
|
1769 \"double\" \"uchar\" \"ushort\" \"uint\" \"ulong\"\n\ |
|
529
|
1770 \n\ |
|
1181
|
1771 DATA : matrix in which the data is stored\n\ |
|
|
1772 COUNT : number of elements read") |
|
529
|
1773 { |
|
|
1774 Octave_object retval; |
|
|
1775 |
|
|
1776 int nargin = args.length (); |
|
|
1777 |
|
1181
|
1778 if (nargin < 1 || nargin > 3) |
|
|
1779 print_usage ("fread"); |
|
529
|
1780 else |
|
1181
|
1781 retval = fread_internal (args, nargout); |
|
529
|
1782 |
|
|
1783 return retval; |
|
|
1784 } |
|
|
1785 |
|
761
|
1786 // Write binary data to a file. |
|
|
1787 // |
|
|
1788 // count = fwrite (fid, data, 'precision') |
|
|
1789 // |
|
|
1790 // fid : file id from fopen |
|
|
1791 // Data : data to be written |
|
|
1792 // precision : type of output element. Can be: |
|
|
1793 // |
|
|
1794 // char, uchar, schar, short, ushort, int, uint, |
|
|
1795 // long, float, double |
|
|
1796 // |
|
|
1797 // Default is uchar. |
|
|
1798 // |
|
|
1799 // count : the number of elements written |
|
|
1800 |
|
1181
|
1801 static Octave_object |
|
506
|
1802 fwrite_internal (const Octave_object& args, int nargout) |
|
444
|
1803 { |
|
497
|
1804 Octave_object retval; |
|
444
|
1805 |
|
506
|
1806 int nargin = args.length (); |
|
|
1807 |
|
761
|
1808 Pix p = file_io_get_file (args(0), "a+", "fwrite"); |
|
444
|
1809 |
|
529
|
1810 if (! p) |
|
444
|
1811 return retval; |
|
|
1812 |
|
|
1813 // Get type and number of bytes per element to read. |
|
|
1814 char *prec = "uchar"; |
|
712
|
1815 if (nargin > 2) |
|
444
|
1816 { |
|
761
|
1817 prec = args(2).string_value (); |
|
636
|
1818 |
|
|
1819 if (error_state) |
|
444
|
1820 { |
|
|
1821 error ("fwrite: precision must be a specified as a string"); |
|
|
1822 return retval; |
|
|
1823 } |
|
|
1824 } |
|
|
1825 |
|
|
1826 file_info file = file_list (p); |
|
|
1827 |
|
761
|
1828 Matrix m = args(1).matrix_value (); |
|
444
|
1829 |
|
636
|
1830 if (! error_state) |
|
|
1831 { |
|
|
1832 int count = m.write (file.fptr (), prec); |
|
444
|
1833 |
|
636
|
1834 retval(0) = (double) count; |
|
|
1835 } |
|
444
|
1836 |
|
|
1837 return retval; |
|
|
1838 } |
|
|
1839 |
|
1181
|
1840 DEFUN ("fwrite", Ffwrite, Sfwrite, 3, 1, |
|
|
1841 "COUNT = fwrite (FILENUM, DATA, PRECISION)\n\ |
|
|
1842 \n\ |
|
|
1843 Writes data to a file in binary form of size PRECISION\n\ |
|
|
1844 \n\ |
|
|
1845 FILENUM : file number from fopen\n\ |
|
|
1846 DATA : matrix of elements to be written\n\ |
|
|
1847 PRECISION : type of data to read, valid types are\n\ |
|
|
1848 \n\ |
|
1230
|
1849 \"char\" \"schar\" \"short\" \"int\" \"long\" \"float\"\n\ |
|
|
1850 \"double\" \"uchar\" \"ushort\" \"uint\" \"ulong\"\n\ |
|
1181
|
1851 \n\ |
|
|
1852 COUNT : number of elements written") |
|
|
1853 { |
|
|
1854 Octave_object retval; |
|
|
1855 |
|
|
1856 int nargin = args.length (); |
|
|
1857 |
|
|
1858 if (nargin < 2 || nargin > 3) |
|
|
1859 print_usage ("fwrite"); |
|
|
1860 else |
|
|
1861 retval = fwrite_internal (args, nargout); |
|
|
1862 |
|
|
1863 return retval; |
|
|
1864 } |
|
|
1865 |
|
|
1866 // Check for an EOF condition on a file opened by fopen. |
|
|
1867 // |
|
|
1868 // eof = feof (fid) |
|
|
1869 // |
|
|
1870 // fid : file id from fopen |
|
|
1871 // eof : non zero for an end of file condition |
|
|
1872 |
|
|
1873 static Octave_object |
|
|
1874 feof_internal (const Octave_object& args, int nargout) |
|
|
1875 { |
|
|
1876 Octave_object retval; |
|
|
1877 |
|
|
1878 // Get file info. |
|
|
1879 Pix p = return_valid_file (args(0)); |
|
|
1880 |
|
|
1881 if (! p) |
|
|
1882 return retval; |
|
|
1883 |
|
|
1884 file_info file = file_list (p); |
|
|
1885 |
|
|
1886 retval(0) = (double) feof (file.fptr ()); |
|
|
1887 |
|
|
1888 return retval; |
|
|
1889 } |
|
|
1890 |
|
712
|
1891 DEFUN ("feof", Ffeof, Sfeof, 1, 1, |
|
529
|
1892 "ERROR = feof (FILENAME or FILENUM)\n\ |
|
|
1893 \n\ |
|
|
1894 Returns a non zero value for an end of file condition for the\n\ |
|
|
1895 file specified by FILENAME or FILENUM from fopen") |
|
|
1896 { |
|
|
1897 Octave_object retval; |
|
|
1898 |
|
|
1899 int nargin = args.length (); |
|
|
1900 |
|
712
|
1901 if (nargin != 1) |
|
529
|
1902 print_usage ("feof"); |
|
|
1903 else |
|
|
1904 retval = feof_internal (args, nargout); |
|
|
1905 |
|
|
1906 return retval; |
|
|
1907 } |
|
|
1908 |
|
1181
|
1909 // Check for an error condition on a file opened by fopen. |
|
761
|
1910 // |
|
1181
|
1911 // [message, errnum] = ferror (fid) |
|
761
|
1912 // |
|
1181
|
1913 // fid : file id from fopen |
|
|
1914 // message : system error message |
|
|
1915 // errnum : error number |
|
761
|
1916 |
|
1181
|
1917 static Octave_object |
|
|
1918 ferror_internal (const Octave_object& args, int nargout) |
|
444
|
1919 { |
|
497
|
1920 Octave_object retval; |
|
444
|
1921 |
|
|
1922 // Get file info. |
|
1049
|
1923 Pix p = return_valid_file (args(0)); |
|
444
|
1924 |
|
529
|
1925 if (! p) |
|
444
|
1926 return retval; |
|
|
1927 |
|
|
1928 file_info file = file_list (p); |
|
|
1929 |
|
1181
|
1930 int ierr = ferror (file.fptr ()); |
|
|
1931 |
|
|
1932 if (nargout > 1) |
|
|
1933 retval(1) = (double) ierr; |
|
|
1934 |
|
|
1935 retval(0) = strsave (strerror (ierr)); |
|
529
|
1936 |
|
|
1937 return retval; |
|
|
1938 } |
|
|
1939 |
|
712
|
1940 DEFUN ("ferror", Fferror, Sferror, 1, 1, |
|
529
|
1941 "ERROR = ferror (FILENAME or FILENUM)\n\ |
|
|
1942 \n\ |
|
|
1943 Returns a non zero value for an error condition on the\n\ |
|
|
1944 file specified by FILENAME or FILENUM from fopen") |
|
|
1945 { |
|
|
1946 Octave_object retval; |
|
|
1947 |
|
|
1948 int nargin = args.length (); |
|
|
1949 |
|
712
|
1950 if (nargin != 1) |
|
529
|
1951 print_usage ("ferror"); |
|
|
1952 else |
|
|
1953 retval = ferror_internal (args, nargout); |
|
444
|
1954 |
|
|
1955 return retval; |
|
|
1956 } |
|
|
1957 |
|
1230
|
1958 static Octave_object |
|
|
1959 popen_internal (const Octave_object& args) |
|
|
1960 { |
|
|
1961 Octave_object retval; |
|
|
1962 |
|
|
1963 if (! args(0).is_string ()) |
|
|
1964 { |
|
|
1965 error ("popen: file name must be a string"); |
|
|
1966 return retval; |
|
|
1967 } |
|
|
1968 |
|
|
1969 char *name = args(0).string_value (); |
|
|
1970 |
|
|
1971 Pix p = return_valid_file (name); |
|
|
1972 |
|
|
1973 if (p) |
|
|
1974 { |
|
|
1975 file_info file = file_list (p); |
|
|
1976 |
|
|
1977 retval(0) = (double) file.number (); |
|
|
1978 |
|
|
1979 return retval; |
|
|
1980 } |
|
|
1981 |
|
|
1982 if (! args(1).is_string ()) |
|
|
1983 { |
|
|
1984 error ("popen: file mode must be a string"); |
|
|
1985 return retval; |
|
|
1986 } |
|
|
1987 |
|
|
1988 char *mode = args(1).string_value (); |
|
|
1989 |
|
|
1990 if (mode[1] || (mode[0] != 'w' && mode[0] != 'r')) |
|
|
1991 { |
|
|
1992 error ("popen: invalid mode, must be either \"r\" or \"w\"."); |
|
|
1993 return retval; |
|
|
1994 } |
|
|
1995 |
|
|
1996 struct stat buffer; |
|
|
1997 if (stat (name, &buffer) == 0 && (buffer.st_mode & S_IFDIR) == S_IFDIR) |
|
|
1998 { |
|
|
1999 error ("popen: can't open directory"); |
|
|
2000 return retval; |
|
|
2001 } |
|
|
2002 |
|
|
2003 FILE *file_ptr = popen (name, mode); |
|
|
2004 |
|
|
2005 if (! file_ptr) |
|
|
2006 { |
|
|
2007 error ("popen: unable to start process `%s'", name); |
|
|
2008 return retval; |
|
|
2009 } |
|
|
2010 |
|
|
2011 int number = file_list.length () + 1; |
|
|
2012 |
|
|
2013 file_info file (number, name, file_ptr, mode); |
|
|
2014 file_list.append (file); |
|
|
2015 |
|
|
2016 retval(0) = (double) number; |
|
|
2017 |
|
|
2018 return retval; |
|
|
2019 } |
|
|
2020 |
|
|
2021 DEFUN ("popen", Fpopen, Spopen, 2, 1, |
|
|
2022 "FILENUM = popen (FILENAME, MODE)\n\ |
|
|
2023 \n\ |
|
|
2024 start a process and create a pipe. Valid values for mode are:\n\ |
|
|
2025 \n\ |
|
|
2026 \"r\" : connect stdout of process to pipe\n\ |
|
|
2027 \"w\" : connect stdin of process to pipe") |
|
|
2028 { |
|
|
2029 Octave_object retval; |
|
|
2030 |
|
|
2031 int nargin = args.length (); |
|
|
2032 |
|
|
2033 if (nargin != 2) |
|
|
2034 print_usage ("popen"); |
|
|
2035 else |
|
|
2036 retval = popen_internal (args); |
|
|
2037 |
|
|
2038 return retval; |
|
|
2039 } |
|
|
2040 |
|
|
2041 static Octave_object |
|
|
2042 pclose_internal (const Octave_object& args) |
|
|
2043 { |
|
|
2044 Octave_object retval; |
|
|
2045 |
|
|
2046 Pix p = return_valid_file (args(0)); |
|
|
2047 |
|
|
2048 if (! p) |
|
|
2049 return retval; |
|
|
2050 |
|
|
2051 file_info file = file_list (p); |
|
|
2052 |
|
|
2053 if (file.number () < 3) |
|
|
2054 { |
|
|
2055 warning ("pclose: can't close stdin, stdout, or stderr!"); |
|
|
2056 return retval; |
|
|
2057 } |
|
|
2058 |
|
|
2059 int success = pclose (file.fptr ()); |
|
|
2060 file_list.del (p); |
|
|
2061 |
|
|
2062 if (success == 0) |
|
|
2063 retval(0) = 1.0; // succeeded |
|
|
2064 else |
|
|
2065 { |
|
|
2066 error ("pclose: error on closing file"); |
|
|
2067 retval(0) = 0.0; // failed |
|
|
2068 } |
|
|
2069 |
|
|
2070 return retval; |
|
|
2071 } |
|
|
2072 |
|
|
2073 DEFUN ("pclose", Fpclose, Spclose, 1, 1, |
|
|
2074 "pclose (FILENAME or FILENUM)\n\ |
|
|
2075 \n\ |
|
|
2076 Close a pipe and terminate the associated process") |
|
|
2077 { |
|
|
2078 Octave_object retval; |
|
|
2079 |
|
|
2080 int nargin = args.length (); |
|
|
2081 |
|
|
2082 if (nargin != 1) |
|
|
2083 print_usage ("pclose"); |
|
|
2084 else |
|
|
2085 retval = pclose_internal (args); |
|
|
2086 |
|
|
2087 return retval; |
|
|
2088 } |
|
|
2089 |
|
|
2090 static Octave_object |
|
|
2091 execute_internal (const Octave_object& args, int nargout) |
|
|
2092 { |
|
|
2093 Octave_object retval (3, tree_constant (-1.0)); |
|
|
2094 |
|
|
2095 pid_t pid = 0; |
|
|
2096 int stdin_pipe[2]; |
|
|
2097 int stdout_pipe[2]; |
|
|
2098 FILE *stdin_file; |
|
|
2099 FILE *stdout_file; |
|
|
2100 int new_stdin; |
|
|
2101 int new_stdout; |
|
|
2102 |
|
|
2103 if (! args(0).is_string ()) |
|
|
2104 { |
|
|
2105 error ("execute: file name must be a string"); |
|
|
2106 return retval; |
|
|
2107 } |
|
|
2108 |
|
|
2109 char *name = args(0).string_value (); |
|
|
2110 |
|
|
2111 if (pipe (stdin_pipe) || pipe (stdout_pipe)) |
|
|
2112 { |
|
|
2113 error ("execute: pipe creation failed"); |
|
|
2114 return retval; |
|
|
2115 } |
|
|
2116 |
|
|
2117 pid = fork (); |
|
|
2118 |
|
|
2119 if (pid < (pid_t) 0) |
|
|
2120 { |
|
|
2121 error ("execute: fork failed - can't create child process"); |
|
|
2122 return retval; |
|
|
2123 } |
|
|
2124 |
|
|
2125 if (pid == (pid_t) 0) |
|
|
2126 { |
|
|
2127 close (stdin_pipe[1]); |
|
|
2128 close (stdout_pipe[0]); |
|
|
2129 |
|
|
2130 dup2 (stdin_pipe[0], STDIN_FILENO); |
|
|
2131 close (stdin_pipe[0]); |
|
|
2132 |
|
|
2133 dup2 (stdout_pipe[1], STDOUT_FILENO); |
|
|
2134 close (stdout_pipe[1]); |
|
|
2135 |
|
|
2136 if (execlp (name, name, 0) == -1) |
|
|
2137 error ("execute: unable to start process `%s'", name); |
|
|
2138 |
|
|
2139 exit (0); |
|
|
2140 return 0.0; |
|
|
2141 } |
|
|
2142 else |
|
|
2143 { |
|
|
2144 close (stdin_pipe[0]); |
|
|
2145 close (stdout_pipe[1]); |
|
|
2146 |
|
|
2147 stdout_file = fdopen (stdout_pipe[0], "r"); |
|
|
2148 stdin_file = fdopen (stdin_pipe[1], "w"); |
|
|
2149 |
|
|
2150 if (fcntl (fileno (stdout_file), F_SETFL, O_NONBLOCK) < 0) |
|
|
2151 { |
|
|
2152 error ("execute: error setting file mode"); |
|
|
2153 return retval; |
|
|
2154 } |
|
|
2155 |
|
|
2156 new_stdin = file_list.length () + 1; |
|
|
2157 new_stdout = new_stdin + 1; |
|
|
2158 |
|
|
2159 file_info new_stdin_file_ptr (new_stdin, name, stdin_file, "w"); |
|
|
2160 file_info new_stdout_file_ptr (new_stdout, name, stdout_file, "r"); |
|
|
2161 |
|
|
2162 file_list.append (new_stdin_file_ptr); |
|
|
2163 file_list.append (new_stdout_file_ptr); |
|
|
2164 } |
|
|
2165 |
|
|
2166 retval(2) = (double) pid; |
|
|
2167 retval(1) = (double) new_stdout; |
|
|
2168 retval(0) = (double) new_stdin; |
|
|
2169 |
|
|
2170 return retval; |
|
|
2171 } |
|
|
2172 |
|
|
2173 DEFUN ("execute", Fexecute, Sexecute, 1, 3, |
|
|
2174 "[STDIN, STDOUT, PID] = execute (COMMAND)\n\ |
|
|
2175 \n\ |
|
|
2176 Start a program and redirect its stdin to STDIN and its stdout to STDOUT") |
|
|
2177 { |
|
|
2178 Octave_object retval; |
|
|
2179 |
|
|
2180 int nargin = args.length (); |
|
|
2181 |
|
|
2182 if (nargin != 1) |
|
|
2183 print_usage ("execute"); |
|
|
2184 else |
|
|
2185 retval = execute_internal (args, nargout); |
|
|
2186 |
|
|
2187 return retval; |
|
|
2188 } |
|
|
2189 |
|
|
2190 static Octave_object |
|
|
2191 sync_system_internal (const Octave_object& args) |
|
|
2192 { |
|
|
2193 Octave_object retval (1, tree_constant (-1.0)); |
|
|
2194 |
|
|
2195 if (! args(0).is_string ()) |
|
|
2196 { |
|
|
2197 error ("sync_system: file name must be a string"); |
|
|
2198 return retval; |
|
|
2199 } |
|
|
2200 |
|
|
2201 char *name = args(0).string_value (); |
|
|
2202 |
|
|
2203 retval (0) = (double) system (name); |
|
|
2204 return retval; |
|
|
2205 } |
|
|
2206 |
|
|
2207 DEFUN ("sync_system", Fsync_system, Ssync_system, 1, 1, |
|
|
2208 "RETCODE = sync_system (FILENAME)\n\ |
|
|
2209 \n\ |
|
|
2210 Start a program and wait until it terminates") |
|
|
2211 { |
|
|
2212 Octave_object retval; |
|
|
2213 |
|
|
2214 int nargin = args.length (); |
|
|
2215 |
|
|
2216 if (nargin != 1) |
|
|
2217 print_usage ("sync_system"); |
|
|
2218 else |
|
|
2219 retval = sync_system_internal (args); |
|
|
2220 |
|
|
2221 return retval; |
|
|
2222 } |
|
|
2223 |
|
|
2224 static Octave_object |
|
|
2225 async_system_internal (const Octave_object& args) |
|
|
2226 { |
|
|
2227 Octave_object retval (1, tree_constant (-1.0)); |
|
|
2228 pid_t pid; |
|
|
2229 |
|
|
2230 if (! args(0).is_string ()) |
|
|
2231 { |
|
|
2232 error ("async_system: file name must be a string"); |
|
|
2233 return retval; |
|
|
2234 } |
|
|
2235 |
|
|
2236 char *name = args(0).string_value (); |
|
|
2237 |
|
|
2238 pid = fork (); |
|
|
2239 |
|
|
2240 if (pid < 0) |
|
|
2241 { |
|
|
2242 error ("async_system: fork failed -- can't create child process"); |
|
|
2243 return retval; |
|
|
2244 } |
|
|
2245 |
|
|
2246 if (pid == 0) |
|
|
2247 { |
|
|
2248 system (name); |
|
|
2249 exit (0); |
|
|
2250 retval (0) = 0.0; |
|
|
2251 return retval; |
|
|
2252 } |
|
|
2253 else |
|
|
2254 { |
|
|
2255 retval (0) = (double) pid; |
|
|
2256 return retval; |
|
|
2257 } |
|
|
2258 } |
|
|
2259 |
|
|
2260 DEFUN ("async_system", Fasync_system, Sasync_system, 1, 1, |
|
|
2261 "PID = async_system (FILENAME)\n\ |
|
|
2262 \n\ |
|
|
2263 Create a new process and start FILENAME") |
|
|
2264 { |
|
|
2265 Octave_object retval; |
|
|
2266 |
|
|
2267 int nargin = args.length (); |
|
|
2268 |
|
|
2269 if (nargin != 1) |
|
|
2270 print_usage ("async_system"); |
|
|
2271 else |
|
|
2272 retval = async_system_internal (args); |
|
|
2273 |
|
|
2274 return retval; |
|
|
2275 } |
|
|
2276 |
|
|
2277 static Octave_object |
|
|
2278 waitpid_internal (const Octave_object& args) |
|
|
2279 { |
|
|
2280 Octave_object retval (1, tree_constant (-1.0)); |
|
|
2281 |
|
|
2282 double pid_num = args(0).double_value (); |
|
|
2283 |
|
|
2284 if (! error_state) |
|
|
2285 { |
|
|
2286 if (D_NINT (pid_num) != pid_num) |
|
|
2287 error ("waitpid: PID must be an integer value"); |
|
|
2288 else |
|
|
2289 { |
|
|
2290 pid_t pid = (pid_t) pid_num; |
|
|
2291 |
|
|
2292 int options = 0; |
|
|
2293 |
|
|
2294 if (args.length () == 2) |
|
|
2295 { |
|
|
2296 double options_num = args(1).double_value (); |
|
|
2297 |
|
|
2298 if (! error_state) |
|
|
2299 { |
|
|
2300 if (D_NINT (options_num) != options_num) |
|
|
2301 error ("waitpid: PID must be an integer value"); |
|
|
2302 else |
|
|
2303 { |
|
|
2304 options = NINT (options_num); |
|
|
2305 if (options < 0 || options > 3) |
|
|
2306 error ("waitpid: invalid OPTIONS value specified"); |
|
|
2307 } |
|
|
2308 } |
|
|
2309 } |
|
|
2310 |
|
|
2311 if (! error_state) |
|
|
2312 retval (0) = (double) waitpid (pid, 0, options); |
|
|
2313 } |
|
|
2314 } |
|
|
2315 |
|
|
2316 return retval; |
|
|
2317 } |
|
|
2318 |
|
|
2319 DEFUN ("waitpid", Fwaitpid, Swaitpid, 1, 1, |
|
|
2320 "STATUS = waitpid (PID, OPTIONS)\n\ |
|
|
2321 \n\ |
|
|
2322 wait for process PID to terminate\n\ |
|
|
2323 \n\ |
|
|
2324 PID can be:\n\ |
|
|
2325 \n\ |
|
|
2326 -1 : wait for any child process\n\ |
|
|
2327 0 : wait for any child process whose process group ID is equal to\n\ |
|
|
2328 that of the Octave interpreter process.\n\ |
|
|
2329 > 0 : wait for termination of the child process with ID PID.\n\ |
|
|
2330 \n\ |
|
|
2331 OPTIONS is:\n\ |
|
|
2332 \n\ |
|
|
2333 0 : wait until signal is received or a child process exits (this\n\ |
|
|
2334 is the default if the OPTIONS argument is missing) \n\ |
|
|
2335 1 : do not hang if status is not immediately available\n\ |
|
|
2336 2 : report the status of any child processes that are\n\ |
|
|
2337 stopped, and whose status has not yet been reported\n\ |
|
|
2338 since they stopped\n\ |
|
|
2339 3 : implies both 1 and 2\n\ |
|
|
2340 \n\ |
|
|
2341 STATUS is:\n\ |
|
|
2342 \n\ |
|
|
2343 -1 : if an error occured\n\ |
|
|
2344 > 0 : the process ID of the child process that exited") |
|
|
2345 { |
|
|
2346 Octave_object retval; |
|
|
2347 |
|
|
2348 int nargin = args.length (); |
|
|
2349 |
|
|
2350 if (nargin == 1 || nargin == 2) |
|
|
2351 retval = waitpid_internal (args); |
|
|
2352 else |
|
|
2353 print_usage ("waitpid"); |
|
|
2354 |
|
|
2355 return retval; |
|
|
2356 } |
|
|
2357 |
|
|
2358 static Octave_object |
|
|
2359 mkfifo_internal (const Octave_object& args) |
|
|
2360 { |
|
|
2361 Octave_object retval (1, tree_constant (-1.0)); |
|
|
2362 |
|
|
2363 if (! args(0).is_string ()) |
|
|
2364 { |
|
|
2365 error ("mkfifo: file name must be a string"); |
|
|
2366 return retval; |
|
|
2367 } |
|
|
2368 |
|
|
2369 char *name = args(0).string_value (); |
|
|
2370 |
|
|
2371 if (! args(1).is_scalar_type ()) |
|
|
2372 { |
|
|
2373 error ("mkfifo: MODE must be an integer"); |
|
|
2374 return retval; |
|
|
2375 } |
|
|
2376 |
|
|
2377 long mode = (long) args(1).double_value (); |
|
|
2378 |
|
|
2379 retval (0) = (double) mkfifo (name, mode); |
|
|
2380 |
|
|
2381 return retval; |
|
|
2382 } |
|
|
2383 |
|
|
2384 DEFUN ("mkfifo", Fmkfifo, Smkfifo, 2, 1, |
|
|
2385 "STATUS = mkfifo (NAME, MODE)\n\ |
|
|
2386 \n\ |
|
|
2387 Create a FIFO special file named NAME with file mode MODE\n\ |
|
|
2388 \n\ |
|
|
2389 STATUS is:\n\ |
|
|
2390 \n\ |
|
|
2391 != 0 : if mkfifo failed\n\ |
|
|
2392 0 : if the FIFO special file could be created") |
|
|
2393 { |
|
|
2394 Octave_object retval; |
|
|
2395 |
|
|
2396 int nargin = args.length (); |
|
|
2397 |
|
|
2398 if (nargin != 2) |
|
|
2399 print_usage ("mkfifo"); |
|
|
2400 else |
|
|
2401 retval = mkfifo_internal (args); |
|
|
2402 |
|
|
2403 return retval; |
|
|
2404 } |
|
|
2405 |
|
|
2406 static Octave_object |
|
|
2407 unlink_internal (const Octave_object& args) |
|
|
2408 { |
|
|
2409 Octave_object retval; |
|
|
2410 |
|
|
2411 if (! args(0).is_string ()) |
|
|
2412 { |
|
|
2413 error ("unlink: file name must be a string"); |
|
|
2414 retval (0) = -1.0; |
|
|
2415 return retval; |
|
|
2416 } |
|
|
2417 |
|
|
2418 char *name = args(0).string_value (); |
|
|
2419 |
|
|
2420 retval (0) = (double) unlink (name); |
|
|
2421 |
|
|
2422 return retval; |
|
|
2423 } |
|
|
2424 |
|
|
2425 DEFUN ("unlink", Funlink, Sunlink, 1, 1, |
|
|
2426 "STATUS = unlink (NAME)\n\ |
|
|
2427 \n\ |
|
|
2428 Delete the file NAME\n\ |
|
|
2429 \n\ |
|
|
2430 STATUS is:\n\ |
|
|
2431 \n\ |
|
|
2432 != 0 : if unlink failed\n\ |
|
|
2433 0 : if the file could be successfully deleted") |
|
|
2434 { |
|
|
2435 Octave_object retval; |
|
|
2436 |
|
|
2437 int nargin = args.length (); |
|
|
2438 |
|
|
2439 if (nargin != 1) |
|
|
2440 print_usage ("unlink"); |
|
|
2441 else |
|
|
2442 retval = unlink_internal (args); |
|
|
2443 |
|
|
2444 return retval; |
|
|
2445 } |
|
|
2446 |
|
444
|
2447 /* |
|
1
|
2448 ;;; Local Variables: *** |
|
|
2449 ;;; mode: C++ *** |
|
|
2450 ;;; page-delimiter: "^/\\*" *** |
|
|
2451 ;;; End: *** |
|
|
2452 */ |
