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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, 675 Mass Ave, Cambridge, MA 02139, 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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25 |
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240
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26 #ifdef HAVE_CONFIG_H |
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27 #include "config.h" |
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1
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28 #endif |
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29 |
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30 #include <DLList.h> |
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31 #include <unistd.h> |
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32 #include <string.h> |
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33 #include <stdio.h> |
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444
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34 #include <errno.h> |
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1
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35 #include <stdlib.h> |
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36 #include <strstream.h> |
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37 #include <ctype.h> |
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38 |
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456
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39 #include "dMatrix.h" |
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444
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40 |
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41 #include "statdefs.h" |
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42 #include "file-io.h" |
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43 #include "input.h" |
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44 #include "octave-hist.h" |
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45 #include "tree-const.h" |
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46 #include "error.h" |
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542
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47 #include "help.h" |
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1
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48 #include "utils.h" |
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49 #include "pager.h" |
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529
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50 #include "defun.h" |
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444
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51 #include "sysdep.h" |
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52 #include "mappers.h" |
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529
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53 #include "variables.h" |
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54 |
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55 // keeps a count of args sent to printf or scanf |
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56 static int fmt_arg_count = 0; |
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57 |
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759
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58 // double linked list containing relevant information about open files |
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59 static DLList <file_info> file_list; |
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60 |
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240
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61 file_info::file_info (void) |
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1
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62 { |
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334
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63 file_number = -1; |
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529
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64 file_name = 0; |
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65 file_fptr = 0; |
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66 file_mode = 0; |
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1
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67 } |
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68 |
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240
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69 file_info::file_info (int n, const char *nm, FILE *t, const char *md) |
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70 { |
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334
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71 file_number = n; |
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72 file_name = strsave (nm); |
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73 file_fptr = t; |
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74 file_mode = strsave (md); |
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240
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75 } |
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76 |
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77 file_info::file_info (const file_info& f) |
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78 { |
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367
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79 file_number = f.file_number; |
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80 file_name = strsave (f.file_name); |
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81 file_fptr = f.file_fptr; |
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82 file_mode = strsave (f.file_mode); |
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1
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83 } |
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84 |
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240
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85 file_info& |
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86 file_info::operator = (const file_info& f) |
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1
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87 { |
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240
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88 if (this != & f) |
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89 { |
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367
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90 file_number = f.file_number; |
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334
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91 delete [] file_name; |
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92 file_name = strsave (f.file_name); |
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93 file_fptr = f.file_fptr; |
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94 delete [] file_mode; |
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95 file_mode = strsave (f.file_mode); |
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240
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96 } |
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1
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97 return *this; |
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98 } |
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99 |
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240
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100 file_info::~file_info (void) |
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101 { |
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334
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102 delete [] file_name; |
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103 delete [] file_mode; |
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104 } |
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105 |
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106 int |
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240
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107 file_info::number (void) const |
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108 { |
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334
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109 return file_number; |
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110 } |
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111 |
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240
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112 const char * |
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113 file_info::name (void) const |
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114 { |
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334
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115 return file_name; |
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116 } |
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117 |
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118 FILE * |
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240
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119 file_info::fptr (void) const |
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1
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120 { |
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334
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121 return file_fptr; |
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122 } |
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123 |
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240
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124 const char * |
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125 file_info::mode (void) const |
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1
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126 { |
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334
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127 return file_mode; |
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128 } |
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129 |
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130 void |
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164
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131 initialize_file_io (void) |
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1
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132 { |
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334
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133 file_info octave_stdin (0, "stdin", stdin, "r"); |
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134 file_info octave_stdout (1, "stdout", stdout, "w"); |
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135 file_info octave_stderr (2, "stderr", stderr, "w"); |
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136 |
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334
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137 file_list.append (octave_stdin); |
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138 file_list.append (octave_stdout); |
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139 file_list.append (octave_stderr); |
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1
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140 } |
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141 |
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761
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142 // Given a file name or number, return a pointer to the corresponding |
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143 // open file. If the file has not already been opened, return NULL. |
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144 |
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145 Pix |
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164
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146 return_valid_file (const tree_constant& arg) |
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147 { |
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610
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148 if (arg.is_string ()) |
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1
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149 { |
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150 Pix p = file_list.first (); |
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240
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151 file_info file; |
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152 int file_count = file_list.length (); |
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1
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153 for (int i = 0; i < file_count; i++) |
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154 { |
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155 char *file_name = arg.string_value (); |
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156 file = file_list (p); |
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157 if (strcmp (file.name (), file_name) == 0) |
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158 return p; |
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159 file_list.next (p); |
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160 } |
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161 } |
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636
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162 else |
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1
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163 { |
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164 double file_num = arg.double_value (); |
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165 |
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166 if (! error_state) |
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1
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167 { |
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168 if (D_NINT (file_num) != file_num) |
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169 error ("file number not an integer value"); |
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170 else |
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1
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171 { |
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636
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172 Pix p = file_list.first (); |
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173 file_info file; |
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896
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174 int file_count = file_list.length (); |
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636
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175 for (int i = 0; i < file_count; i++) |
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176 { |
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177 file = file_list (p); |
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178 if (file.number () == file_num) |
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179 return p; |
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180 file_list.next (p); |
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181 } |
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182 error ("no file with that number"); |
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183 } |
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184 } |
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185 else |
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186 error ("inapproriate file specifier"); |
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187 } |
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188 |
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529
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189 return 0; |
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1
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190 } |
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191 |
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192 static Pix |
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636
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193 fopen_file_for_user (const char *name, const char *mode, |
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370
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194 const char *warn_for) |
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1
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195 { |
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636
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196 FILE *file_ptr = fopen (name, mode); |
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529
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197 if (file_ptr) |
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1
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198 { |
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896
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199 int file_number = file_list.length () + 1; |
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200 |
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201 file_info file (file_number, name, file_ptr, mode); |
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1
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202 file_list.append (file); |
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203 |
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204 Pix p = file_list.first (); |
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240
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205 file_info file_from_list; |
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896
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206 int file_count = file_list.length (); |
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1
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207 for (int i = 0; i < file_count; i++) |
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208 { |
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209 file_from_list = file_list (p); |
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636
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210 if (strcmp (file_from_list.name (), name) == 0) |
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211 return p; |
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212 file_list.next (p); |
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213 } |
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214 } |
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215 |
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636
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216 error ("%s: unable to open file `%s'", warn_for, name); |
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240
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217 |
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529
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218 return 0; |
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1
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219 } |
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220 |
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368
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221 static Pix |
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636
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222 file_io_get_file (const tree_constant& arg, const char *mode, |
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368
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223 const char *warn_for) |
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224 { |
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225 Pix p = return_valid_file (arg); |
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226 |
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529
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227 if (! p) |
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368
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228 { |
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610
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229 if (arg.is_string ()) |
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368
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230 { |
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231 char *name = arg.string_value (); |
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232 |
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233 struct stat buffer; |
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234 int status = stat (name, &buffer); |
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235 |
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372
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236 if (status == 0) |
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368
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237 { |
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238 if ((buffer.st_mode & S_IFREG) == S_IFREG) |
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636
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239 p = fopen_file_for_user (name, mode, warn_for); |
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368
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240 else |
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241 error ("%s: invalid file type", warn_for); |
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242 } |
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372
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243 else if (status < 0 && *mode != 'r') |
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636
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244 p = fopen_file_for_user (name, mode, warn_for); |
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368
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245 else |
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246 error ("%s: can't stat file `%s'", warn_for, name); |
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247 } |
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248 else |
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249 error ("%s: invalid file specifier", warn_for); |
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250 } |
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251 |
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252 return p; |
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253 } |
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1
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254 |
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712
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255 DEFUN ("fclose", Ffclose, Sfclose, 1, 1, |
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529
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256 "fclose (FILENAME or FILENUM): close a file") |
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257 { |
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258 Octave_object retval; |
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259 |
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260 int nargin = args.length (); |
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261 |
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712
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262 if (nargin != 1) |
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529
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263 print_usage ("fclose"); |
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264 else |
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265 retval = fclose_internal (args); |
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266 |
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267 return retval; |
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268 } |
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269 |
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497
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270 Octave_object |
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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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276 |
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529
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277 if (! p) |
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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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712
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302 DEFUN ("fflush", Ffflush, Sfflush, 1, 1, |
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529
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303 "fflush (FILENAME or FILENUM): flush buffered data to output file") |
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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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529
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310 print_usage ("fflush"); |
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311 else |
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312 retval = fflush_internal (args); |
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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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497
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317 Octave_object |
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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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353 static int |
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164
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354 valid_mode (const char *mode) |
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1
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355 { |
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529
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356 if (mode) |
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1
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357 { |
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358 char m = mode[0]; |
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359 if (m == 'r' || m == 'w' || m == 'a') |
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360 { |
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361 m = mode[1]; |
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362 return (m == '\0' || (m == '+' && mode[2] == '\0')); |
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363 } |
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364 } |
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365 return 0; |
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366 } |
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367 |
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712
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368 DEFUN ("fgets", Ffgets, Sfgets, 2, 2, |
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529
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369 "[STRING, LENGTH] = fgets (FILENAME or FILENUM, LENGTH)\n\ |
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370 \n\ |
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371 read a string from a file") |
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372 { |
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373 Octave_object retval; |
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374 |
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375 int nargin = args.length (); |
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376 |
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712
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377 if (nargin != 2) |
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529
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378 print_usage ("fgets"); |
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379 else |
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380 retval = fgets_internal (args, nargout); |
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381 |
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382 return retval; |
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383 } |
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384 |
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497
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385 Octave_object |
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386 fgets_internal (const Octave_object& args, int nargout) |
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1
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387 { |
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497
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388 Octave_object retval; |
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1
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389 |
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712
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390 Pix p = file_io_get_file (args(0), "r", "fgets"); |
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1
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391 |
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529
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392 if (! p) |
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368
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393 return retval; |
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394 |
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636
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395 |
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712
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396 double dlen = args(1).double_value (); |
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636
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397 |
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398 if (error_state) |
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399 return retval; |
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400 |
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1086
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401 if (xisnan (dlen)) |
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402 { |
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403 error ("fgets: NaN invalid as length"); |
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404 return retval; |
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405 } |
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406 |
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636
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407 int length = NINT (dlen); |
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408 |
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409 if ((double) length != dlen) |
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1
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410 { |
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636
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411 error ("fgets: length not an integer value"); |
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412 return retval; |
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1
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413 } |
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414 |
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368
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415 file_info file = file_list (p); |
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416 |
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636
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417 char string [length+1]; |
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1
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418 char *success = fgets (string, length+1, file.fptr ()); |
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419 |
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529
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420 if (! success) |
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1
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421 { |
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636
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422 retval(0) = -1.0; |
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1
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423 return retval; |
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|
424 } |
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425 |
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426 if (nargout == 2) |
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636
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427 retval(1) = (double) strlen (string); |
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1
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428 |
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636
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429 retval(0) = string; |
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1
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430 |
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431 return retval; |
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|
432 } |
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433 |
|
712
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434 DEFUN ("fopen", Ffopen, Sfopen, 2, 1, |
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529
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435 "FILENUM = fopen (FILENAME, MODE): open a file\n\ |
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436 \n\ |
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437 Valid values for mode include:\n\ |
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438 \n\ |
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439 r : open text file for reading\n\ |
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|
440 w : open text file for writing; discard previous contents if any\n\ |
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441 a : append; open or create text file for writing at end of file\n\ |
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442 r+ : open text file for update (i.e., reading and writing)\n\ |
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443 w+ : create text file for update; discard previous contents if any\n\ |
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444 a+ : append; open or create text file for update, writing at end\n\n\ |
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445 Update mode permits reading from and writing to the same file.") |
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|
446 { |
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447 Octave_object retval; |
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448 |
|
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449 int nargin = args.length (); |
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450 |
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712
|
451 if (nargin != 2) |
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529
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452 print_usage ("fopen"); |
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|
453 else |
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|
454 retval = fopen_internal (args); |
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455 |
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456 return retval; |
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|
457 } |
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458 |
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497
|
459 Octave_object |
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|
460 fopen_internal (const Octave_object& args) |
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1
|
461 { |
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497
|
462 Octave_object retval; |
|
1
|
463 Pix p; |
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464 |
|
712
|
465 if (! args(0).is_string ()) |
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1
|
466 { |
|
|
467 error ("fopen: file name must be a string"); |
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|
468 return retval; |
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|
469 } |
|
|
470 |
|
712
|
471 p = return_valid_file (args(0)); |
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1
|
472 |
|
529
|
473 if (p) |
|
1
|
474 { |
|
240
|
475 file_info file = file_list (p); |
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1
|
476 |
|
636
|
477 retval(0) = (double) file.number (); |
|
1
|
478 |
|
|
479 return retval; |
|
|
480 } |
|
|
481 |
|
712
|
482 if (! args(1).is_string ()) |
|
1
|
483 { |
|
370
|
484 error ("fopen: file mode must be a string"); |
|
1
|
485 return retval; |
|
|
486 } |
|
|
487 |
|
712
|
488 char *name = args(0).string_value (); |
|
|
489 char *mode = args(1).string_value (); |
|
1
|
490 |
|
|
491 if (! valid_mode (mode)) |
|
|
492 { |
|
|
493 error ("fopen: invalid mode"); |
|
|
494 return retval; |
|
|
495 } |
|
|
496 |
|
|
497 struct stat buffer; |
|
|
498 if (stat (name, &buffer) == 0 && (buffer.st_mode & S_IFDIR) == S_IFDIR) |
|
|
499 { |
|
|
500 error ("fopen: can't open directory"); |
|
|
501 return retval; |
|
|
502 } |
|
|
503 |
|
|
504 FILE *file_ptr = fopen (name, mode); |
|
|
505 |
|
529
|
506 if (! file_ptr) |
|
1
|
507 { |
|
370
|
508 error ("fopen: unable to open file `%s'", name); |
|
1
|
509 return retval; |
|
|
510 } |
|
|
511 |
|
896
|
512 int file_number = file_list.length () + 1; |
|
1
|
513 |
|
896
|
514 file_info file (file_number, name, file_ptr, mode); |
|
1
|
515 file_list.append (file); |
|
|
516 |
|
896
|
517 retval(0) = (double) file_number; |
|
1
|
518 |
|
|
519 return retval; |
|
|
520 } |
|
|
521 |
|
712
|
522 DEFUN ("freport", Ffreport, Sfreport, 0, 1, |
|
529
|
523 "freport (): list open files and their status") |
|
|
524 { |
|
|
525 Octave_object retval; |
|
|
526 |
|
|
527 int nargin = args.length (); |
|
|
528 |
|
712
|
529 if (nargin > 0) |
|
529
|
530 warning ("freport: ignoring extra arguments"); |
|
|
531 |
|
|
532 retval = freport_internal (); |
|
|
533 |
|
|
534 return retval; |
|
|
535 } |
|
|
536 |
|
497
|
537 Octave_object |
|
164
|
538 freport_internal (void) |
|
1
|
539 { |
|
497
|
540 Octave_object retval; |
|
1
|
541 Pix p = file_list.first (); |
|
|
542 |
|
|
543 ostrstream output_buf; |
|
|
544 |
|
|
545 output_buf << "\n number mode name\n\n"; |
|
896
|
546 |
|
|
547 int file_count = file_list.length (); |
|
1
|
548 for (int i = 0; i < file_count; i++) |
|
|
549 { |
|
240
|
550 file_info file = file_list (p); |
|
1
|
551 output_buf.form ("%7d%6s %s\n", file.number (), file.mode (), |
|
|
552 file.name ()); |
|
|
553 file_list.next (p); |
|
|
554 } |
|
|
555 |
|
|
556 output_buf << "\n" << ends; |
|
|
557 maybe_page_output (output_buf); |
|
|
558 |
|
|
559 return retval; |
|
|
560 } |
|
|
561 |
|
712
|
562 DEFUN ("frewind", Ffrewind, Sfrewind, 1, 1, |
|
529
|
563 "frewind (FILENAME or FILENUM): set file position at beginning of file") |
|
|
564 { |
|
|
565 Octave_object retval; |
|
|
566 |
|
|
567 int nargin = args.length (); |
|
|
568 |
|
712
|
569 if (nargin != 1) |
|
529
|
570 print_usage ("frewind"); |
|
|
571 else |
|
|
572 retval = frewind_internal (args); |
|
|
573 |
|
|
574 return retval; |
|
|
575 } |
|
|
576 |
|
497
|
577 Octave_object |
|
|
578 frewind_internal (const Octave_object& args) |
|
1
|
579 { |
|
497
|
580 Octave_object retval; |
|
1
|
581 |
|
712
|
582 Pix p = file_io_get_file (args(0), "a+", "frewind"); |
|
1
|
583 |
|
529
|
584 if (p) |
|
368
|
585 { |
|
|
586 file_info file = file_list (p); |
|
|
587 rewind (file.fptr ()); |
|
|
588 } |
|
1
|
589 |
|
|
590 return retval; |
|
|
591 } |
|
|
592 |
|
712
|
593 DEFUN ("fseek", Ffseek, Sfseek, 3, 1, |
|
529
|
594 "fseek (FILENAME or FILENUM, OFFSET [, ORIGIN])\n\ |
|
|
595 \n\ |
|
|
596 set file position for reading or writing") |
|
|
597 { |
|
|
598 Octave_object retval; |
|
|
599 |
|
|
600 int nargin = args.length (); |
|
|
601 |
|
712
|
602 if (nargin != 2 && nargin != 3) |
|
529
|
603 print_usage ("fseek"); |
|
|
604 else |
|
|
605 retval = fseek_internal (args); |
|
|
606 |
|
|
607 return retval; |
|
|
608 } |
|
|
609 |
|
497
|
610 Octave_object |
|
506
|
611 fseek_internal (const Octave_object& args) |
|
1
|
612 { |
|
497
|
613 Octave_object retval; |
|
1
|
614 |
|
506
|
615 int nargin = args.length (); |
|
|
616 |
|
712
|
617 Pix p = file_io_get_file (args(0), "a+", "fseek"); |
|
1
|
618 |
|
529
|
619 if (! p) |
|
368
|
620 return retval; |
|
1
|
621 |
|
|
622 long origin = SEEK_SET; |
|
636
|
623 |
|
712
|
624 double doff = args(1).double_value (); |
|
636
|
625 |
|
|
626 if (error_state) |
|
|
627 return retval; |
|
|
628 |
|
1086
|
629 if (xisnan (doff)) |
|
|
630 { |
|
|
631 error ("fseek: NaN invalid as offset"); |
|
|
632 return retval; |
|
|
633 } |
|
|
634 |
|
636
|
635 long offset = NINT (doff); |
|
|
636 |
|
|
637 if ((double) offset != doff) |
|
1
|
638 { |
|
636
|
639 error ("fseek: offset not an integer value"); |
|
|
640 return retval; |
|
|
641 } |
|
|
642 |
|
712
|
643 if (nargin == 3) |
|
636
|
644 { |
|
712
|
645 double dorig = args(2).double_value (); |
|
636
|
646 |
|
|
647 if (error_state) |
|
|
648 return retval; |
|
|
649 |
|
1086
|
650 if (xisnan (dorig)) |
|
|
651 { |
|
|
652 error ("fseek: NaN invalid as origin"); |
|
|
653 return retval; |
|
|
654 } |
|
|
655 |
|
636
|
656 origin = NINT (dorig); |
|
|
657 |
|
|
658 if ((double) dorig != origin) |
|
1
|
659 { |
|
636
|
660 error ("fseek: origin not an integer value"); |
|
1
|
661 return retval; |
|
|
662 } |
|
|
663 |
|
763
|
664 if (origin == 0) |
|
|
665 origin = SEEK_SET; |
|
|
666 else if (origin == 1) |
|
1
|
667 origin = SEEK_CUR; |
|
763
|
668 else if (origin == 2) |
|
1
|
669 origin = SEEK_END; |
|
|
670 else |
|
|
671 { |
|
636
|
672 error ("fseek: invalid value for origin"); |
|
|
673 return retval; |
|
1
|
674 } |
|
|
675 } |
|
|
676 |
|
240
|
677 file_info file = file_list (p); |
|
1
|
678 int success = fseek (file.fptr (), offset, origin); |
|
|
679 |
|
|
680 if (success == 0) |
|
636
|
681 retval(0) = 1.0; // succeeded |
|
1
|
682 else |
|
|
683 { |
|
|
684 error ("fseek: file error"); |
|
636
|
685 retval(0) = 0.0; // failed |
|
1
|
686 } |
|
|
687 |
|
|
688 return retval; |
|
|
689 } |
|
|
690 |
|
761
|
691 // Tell current position of file. |
|
|
692 |
|
712
|
693 DEFUN ("ftell", Fftell, Sftell, 1, 1, |
|
529
|
694 "POSITION = ftell (FILENAME or FILENUM): returns the current file position") |
|
|
695 { |
|
|
696 Octave_object retval; |
|
|
697 |
|
|
698 int nargin = args.length (); |
|
|
699 |
|
712
|
700 if (nargin != 1) |
|
529
|
701 print_usage ("ftell"); |
|
|
702 else |
|
|
703 retval = ftell_internal (args); |
|
|
704 |
|
|
705 return retval; |
|
|
706 } |
|
|
707 |
|
497
|
708 Octave_object |
|
|
709 ftell_internal (const Octave_object& args) |
|
1
|
710 { |
|
497
|
711 Octave_object retval; |
|
1
|
712 |
|
712
|
713 Pix p = file_io_get_file (args(0), "a+", "ftell"); |
|
1
|
714 |
|
529
|
715 if (p) |
|
368
|
716 { |
|
|
717 file_info file = file_list (p); |
|
|
718 long offset = ftell (file.fptr ()); |
|
636
|
719 |
|
|
720 retval(0) = (double) offset; |
|
1
|
721 |
|
368
|
722 if (offset == -1L) |
|
|
723 error ("ftell: write error"); |
|
|
724 } |
|
1
|
725 |
|
|
726 return retval; |
|
|
727 } |
|
|
728 |
|
|
729 void |
|
164
|
730 close_files (void) |
|
1
|
731 { |
|
|
732 Pix p = file_list.first (); |
|
|
733 |
|
896
|
734 int file_count = file_list.length (); |
|
1
|
735 for (int i = 0; i < file_count; i++) |
|
|
736 { |
|
896
|
737 if (p) |
|
1
|
738 { |
|
896
|
739 file_info file = file_list (p); |
|
|
740 |
|
|
741 if (i > 2) // do not close stdin, stdout, stderr! |
|
|
742 { |
|
|
743 int success = fclose (file.fptr ()); |
|
|
744 if (success != 0) |
|
|
745 error ("closing %s", file.name ()); |
|
|
746 } |
|
|
747 |
|
|
748 file_list.del (p); |
|
1
|
749 } |
|
896
|
750 else |
|
|
751 { |
|
|
752 error ("inconsistent state for internal file list!"); |
|
|
753 break; |
|
|
754 } |
|
1
|
755 } |
|
|
756 } |
|
|
757 |
|
|
758 static int |
|
497
|
759 process_printf_format (const char *s, const Octave_object& args, |
|
506
|
760 ostrstream& sb, const char *type) |
|
1
|
761 { |
|
|
762 ostrstream fmt; |
|
|
763 |
|
506
|
764 int nargin = args.length (); |
|
|
765 |
|
1
|
766 fmt << "%"; // do_printf() already blew past this one... |
|
|
767 |
|
|
768 int chars_from_fmt_str = 0; |
|
|
769 |
|
|
770 again: |
|
|
771 switch (*s) |
|
|
772 { |
|
|
773 case '+': case '-': case ' ': case '0': case '#': |
|
|
774 chars_from_fmt_str++; |
|
|
775 fmt << *s++; |
|
|
776 goto again; |
|
|
777 |
|
|
778 case '\0': |
|
|
779 goto invalid_format; |
|
|
780 |
|
|
781 default: |
|
|
782 break; |
|
|
783 } |
|
|
784 |
|
|
785 if (*s == '*') |
|
|
786 { |
|
712
|
787 if (fmt_arg_count > nargin) |
|
1
|
788 { |
|
218
|
789 error ("%s: not enough arguments", type); |
|
1
|
790 return -1; |
|
|
791 } |
|
|
792 |
|
636
|
793 double tmp_len = args(fmt_arg_count++).double_value (); |
|
|
794 |
|
1086
|
795 if (error_state || xisnan (tmp_len)) |
|
1
|
796 { |
|
218
|
797 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
798 return -1; |
|
|
799 } |
|
|
800 |
|
636
|
801 fmt << NINT (tmp_len); |
|
1
|
802 s++; |
|
|
803 chars_from_fmt_str++; |
|
|
804 } |
|
|
805 else |
|
|
806 { |
|
|
807 while (*s != '\0' && isdigit (*s)) |
|
|
808 { |
|
|
809 chars_from_fmt_str++; |
|
|
810 fmt << *s++; |
|
|
811 } |
|
|
812 } |
|
|
813 |
|
|
814 if (*s == '\0') |
|
|
815 goto invalid_format; |
|
|
816 |
|
|
817 if (*s == '.') |
|
|
818 { |
|
|
819 chars_from_fmt_str++; |
|
|
820 fmt << *s++; |
|
|
821 } |
|
|
822 |
|
|
823 if (*s == '*') |
|
|
824 { |
|
|
825 if (*(s-1) == '*') |
|
|
826 goto invalid_format; |
|
|
827 |
|
712
|
828 if (fmt_arg_count > nargin) |
|
1
|
829 { |
|
218
|
830 error ("%s: not enough arguments", type); |
|
1
|
831 return -1; |
|
|
832 } |
|
|
833 |
|
636
|
834 double tmp_len = args(fmt_arg_count++).double_value (); |
|
|
835 |
|
1086
|
836 if (error_state || xisnan (tmp_len)) |
|
1
|
837 { |
|
218
|
838 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
839 return -1; |
|
|
840 } |
|
|
841 |
|
636
|
842 fmt << NINT (tmp_len); |
|
1
|
843 s++; |
|
|
844 chars_from_fmt_str++; |
|
|
845 } |
|
|
846 else |
|
|
847 { |
|
|
848 while (*s != '\0' && isdigit (*s)) |
|
|
849 { |
|
|
850 chars_from_fmt_str++; |
|
|
851 fmt << *s++; |
|
|
852 } |
|
|
853 } |
|
|
854 |
|
|
855 if (*s == '\0') |
|
|
856 goto invalid_format; |
|
|
857 |
|
|
858 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
859 { |
|
|
860 chars_from_fmt_str++; |
|
|
861 fmt << *s++; |
|
|
862 } |
|
|
863 |
|
|
864 if (*s == '\0') |
|
|
865 goto invalid_format; |
|
|
866 |
|
712
|
867 if (fmt_arg_count > nargin) |
|
1
|
868 { |
|
218
|
869 error ("%s: not enough arguments", type); |
|
1
|
870 return -1; |
|
|
871 } |
|
|
872 |
|
|
873 switch (*s) |
|
|
874 { |
|
|
875 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
636
|
876 { |
|
|
877 double d = args(fmt_arg_count++).double_value (); |
|
1
|
878 |
|
1086
|
879 if (error_state || xisnan (d)) |
|
|
880 goto invalid_conversion; |
|
|
881 |
|
636
|
882 int val = NINT (d); |
|
|
883 |
|
1086
|
884 if ((double) val != d) |
|
636
|
885 goto invalid_conversion; |
|
|
886 else |
|
|
887 { |
|
|
888 chars_from_fmt_str++; |
|
|
889 fmt << *s << ends; |
|
|
890 char *tmp_fmt = fmt.str (); |
|
|
891 sb.form (tmp_fmt, val); |
|
|
892 delete [] tmp_fmt; |
|
|
893 return chars_from_fmt_str; |
|
|
894 } |
|
|
895 } |
|
1
|
896 |
|
|
897 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
636
|
898 { |
|
|
899 double val = args(fmt_arg_count++).double_value (); |
|
1
|
900 |
|
636
|
901 if (error_state) |
|
|
902 goto invalid_conversion; |
|
|
903 else |
|
|
904 { |
|
|
905 chars_from_fmt_str++; |
|
|
906 fmt << *s << ends; |
|
|
907 char *tmp_fmt = fmt.str (); |
|
|
908 sb.form (tmp_fmt, val); |
|
|
909 delete [] tmp_fmt; |
|
|
910 return chars_from_fmt_str; |
|
|
911 } |
|
|
912 } |
|
1
|
913 |
|
|
914 case 's': |
|
636
|
915 { |
|
|
916 char *val = args(fmt_arg_count++).string_value (); |
|
1
|
917 |
|
636
|
918 if (error_state) |
|
|
919 goto invalid_conversion; |
|
|
920 else |
|
|
921 { |
|
|
922 chars_from_fmt_str++; |
|
|
923 fmt << *s << ends; |
|
|
924 char *tmp_fmt = fmt.str (); |
|
|
925 sb.form (tmp_fmt, val); |
|
|
926 delete [] tmp_fmt; |
|
|
927 return chars_from_fmt_str; |
|
|
928 } |
|
|
929 } |
|
1
|
930 |
|
|
931 case 'c': |
|
636
|
932 { |
|
|
933 char *val = args(fmt_arg_count++).string_value (); |
|
1
|
934 |
|
636
|
935 if (error_state || strlen (val) != 1) |
|
|
936 goto invalid_conversion; |
|
|
937 else |
|
|
938 { |
|
|
939 chars_from_fmt_str++; |
|
|
940 fmt << *s << ends; |
|
|
941 char *tmp_fmt = fmt.str (); |
|
|
942 sb.form (tmp_fmt, *val); |
|
|
943 delete [] tmp_fmt; |
|
|
944 return chars_from_fmt_str; |
|
|
945 } |
|
|
946 } |
|
1
|
947 |
|
|
948 default: |
|
|
949 goto invalid_format; |
|
|
950 } |
|
|
951 |
|
|
952 invalid_conversion: |
|
218
|
953 error ("%s: invalid conversion", type); |
|
1
|
954 return -1; |
|
|
955 |
|
|
956 invalid_format: |
|
218
|
957 error ("%s: invalid format", type); |
|
1
|
958 return -1; |
|
|
959 } |
|
|
960 |
|
761
|
961 // Formatted printing to a file. |
|
1
|
962 |
|
529
|
963 DEFUN ("fprintf", Ffprintf, Sfprintf, -1, 1, |
|
|
964 "fprintf (FILENAME or FILENUM, FORMAT, ...)") |
|
|
965 { |
|
|
966 Octave_object retval; |
|
|
967 |
|
|
968 int nargin = args.length (); |
|
|
969 |
|
712
|
970 if (nargin < 2) |
|
529
|
971 print_usage ("fprintf"); |
|
|
972 else |
|
|
973 retval = do_printf ("fprintf", args, nargout); |
|
|
974 |
|
|
975 return retval; |
|
|
976 } |
|
|
977 |
|
761
|
978 // Formatted printing. |
|
|
979 |
|
529
|
980 DEFUN ("printf", Fprintf, Sprintf, -1, 1, |
|
|
981 "printf (FORMAT, ...)") |
|
|
982 { |
|
|
983 Octave_object retval; |
|
|
984 |
|
|
985 int nargin = args.length (); |
|
|
986 |
|
712
|
987 if (nargin < 1) |
|
529
|
988 print_usage ("printf"); |
|
|
989 else |
|
|
990 retval = do_printf ("printf", args, nargout); |
|
|
991 |
|
|
992 return retval; |
|
|
993 } |
|
|
994 |
|
761
|
995 // Formatted printing to a string. |
|
|
996 |
|
529
|
997 DEFUN ("sprintf", Fsprintf, Ssprintf, -1, 1, |
|
|
998 "s = sprintf (FORMAT, ...)") |
|
|
999 { |
|
|
1000 Octave_object retval; |
|
|
1001 |
|
|
1002 int nargin = args.length (); |
|
|
1003 |
|
712
|
1004 if (nargin < 1) |
|
529
|
1005 print_usage ("sprintf"); |
|
|
1006 else |
|
|
1007 retval = do_printf ("sprintf", args, nargout); |
|
|
1008 |
|
|
1009 return retval; |
|
|
1010 } |
|
|
1011 |
|
497
|
1012 Octave_object |
|
506
|
1013 do_printf (const char *type, const Octave_object& args, int nargout) |
|
1
|
1014 { |
|
497
|
1015 Octave_object retval; |
|
712
|
1016 fmt_arg_count = 0; |
|
1
|
1017 char *fmt; |
|
240
|
1018 file_info file; |
|
1
|
1019 |
|
|
1020 if (strcmp (type, "fprintf") == 0) |
|
|
1021 { |
|
712
|
1022 Pix p = file_io_get_file (args(0), "a+", type); |
|
368
|
1023 |
|
529
|
1024 if (! p) |
|
368
|
1025 return retval; |
|
1
|
1026 |
|
|
1027 file = file_list (p); |
|
368
|
1028 |
|
1
|
1029 if (file.mode () == "r") |
|
|
1030 { |
|
|
1031 error ("%s: file is read only", type); |
|
|
1032 return retval; |
|
|
1033 } |
|
368
|
1034 |
|
712
|
1035 fmt = args(1).string_value (); |
|
368
|
1036 |
|
636
|
1037 if (error_state) |
|
|
1038 { |
|
|
1039 error ("%s: format must be a string", type); |
|
|
1040 return retval; |
|
|
1041 } |
|
|
1042 |
|
|
1043 fmt_arg_count += 2; |
|
1
|
1044 } |
|
|
1045 else |
|
|
1046 { |
|
712
|
1047 fmt = args(0).string_value (); |
|
636
|
1048 |
|
|
1049 if (error_state) |
|
|
1050 { |
|
|
1051 error ("%s: invalid format string", type); |
|
|
1052 return retval; |
|
|
1053 } |
|
|
1054 |
|
|
1055 fmt_arg_count++; |
|
1
|
1056 } |
|
|
1057 |
|
|
1058 // Scan fmt for % escapes and print out the arguments. |
|
|
1059 |
|
|
1060 ostrstream output_buf; |
|
|
1061 |
|
|
1062 char *ptr = fmt; |
|
|
1063 |
|
|
1064 for (;;) |
|
|
1065 { |
|
|
1066 char c; |
|
|
1067 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1068 output_buf << c; |
|
|
1069 |
|
|
1070 if (c == '\0') |
|
|
1071 break; |
|
|
1072 |
|
|
1073 if (*ptr == '%') |
|
|
1074 { |
|
|
1075 ptr++; |
|
|
1076 output_buf << c; |
|
|
1077 continue; |
|
|
1078 } |
|
|
1079 |
|
|
1080 // We must be looking at a format specifier. Extract it or fail. |
|
|
1081 |
|
|
1082 |
|
506
|
1083 int status = process_printf_format (ptr, args, output_buf, type); |
|
1
|
1084 |
|
|
1085 if (status < 0) |
|
|
1086 return retval; |
|
|
1087 |
|
|
1088 ptr += status; |
|
|
1089 } |
|
|
1090 |
|
|
1091 output_buf << ends; |
|
|
1092 if (strcmp (type, "printf") == 0 |
|
|
1093 || (strcmp (type, "fprintf") == 0 && file.number () == 1)) |
|
|
1094 { |
|
|
1095 maybe_page_output (output_buf); |
|
|
1096 } |
|
|
1097 else if (strcmp (type, "fprintf") == 0) |
|
|
1098 { |
|
|
1099 char *msg = output_buf.str (); |
|
|
1100 int success = fputs (msg, file.fptr ()); |
|
|
1101 if (success == EOF) |
|
218
|
1102 warning ("%s: unknown failure writing to file", type); |
|
1
|
1103 delete [] msg; |
|
|
1104 } |
|
|
1105 else if (strcmp (type, "sprintf") == 0) |
|
|
1106 { |
|
|
1107 char *msg = output_buf.str (); |
|
636
|
1108 retval(0) = msg; |
|
1
|
1109 delete [] msg; |
|
|
1110 } |
|
|
1111 |
|
|
1112 return retval; |
|
|
1113 } |
|
|
1114 |
|
|
1115 static int |
|
368
|
1116 process_scanf_format (const char *s, ostrstream& fmt, |
|
|
1117 const char *type, int nargout, FILE* fptr, |
|
497
|
1118 Octave_object& values) |
|
1
|
1119 { |
|
|
1120 fmt << "%"; |
|
|
1121 |
|
|
1122 int chars_from_fmt_str = 0; |
|
|
1123 int store_value = 1; |
|
628
|
1124 int string_width = 0; |
|
1
|
1125 int success = 1; |
|
|
1126 |
|
|
1127 if (*s == '*') |
|
|
1128 { |
|
|
1129 store_value = 0; |
|
|
1130 s++; |
|
|
1131 chars_from_fmt_str++; |
|
|
1132 } |
|
|
1133 |
|
|
1134 if (isdigit (*s)) |
|
|
1135 { |
|
|
1136 ostrstream str_number; |
|
|
1137 while (*s != '\0' && isdigit (*s)) |
|
|
1138 { |
|
|
1139 chars_from_fmt_str++; |
|
|
1140 str_number << *s; |
|
|
1141 fmt << *s++; |
|
|
1142 } |
|
|
1143 str_number << ends; |
|
|
1144 char *number = str_number.str (); |
|
|
1145 string_width = atoi (number); |
|
|
1146 delete [] number; |
|
|
1147 } |
|
|
1148 |
|
|
1149 if (*s == '\0') |
|
|
1150 goto invalid_format; |
|
|
1151 |
|
|
1152 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
1153 { |
|
|
1154 chars_from_fmt_str++; |
|
|
1155 s++; |
|
|
1156 } |
|
|
1157 |
|
|
1158 if (*s == '\0') |
|
|
1159 goto invalid_format; |
|
|
1160 |
|
368
|
1161 // Even if we don't have a place to store them, attempt to convert |
|
|
1162 // everything specified by the format string. |
|
1
|
1163 |
|
712
|
1164 if (fmt_arg_count > (nargout ? nargout : 1)) |
|
368
|
1165 store_value = 0; |
|
1
|
1166 |
|
|
1167 switch (*s) |
|
|
1168 { |
|
|
1169 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
|
1170 { |
|
|
1171 chars_from_fmt_str++; |
|
|
1172 fmt << *s << ends; |
|
|
1173 int temp; |
|
|
1174 char *str = fmt.str (); |
|
|
1175 success = fscanf (fptr, str, &temp); |
|
|
1176 delete [] str; |
|
|
1177 if (success > 0 && store_value) |
|
636
|
1178 values(fmt_arg_count++) = (double) temp; |
|
1
|
1179 } |
|
|
1180 break; |
|
628
|
1181 |
|
1
|
1182 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
|
1183 { |
|
|
1184 chars_from_fmt_str++; |
|
|
1185 fmt << 'l' << *s << ends; |
|
|
1186 double temp; |
|
|
1187 char *str = fmt.str (); |
|
|
1188 success = fscanf (fptr, str, &temp); |
|
|
1189 delete [] str; |
|
|
1190 if (success > 0 && store_value) |
|
636
|
1191 values(fmt_arg_count++) = temp; |
|
1
|
1192 } |
|
|
1193 break; |
|
628
|
1194 |
|
1
|
1195 case 's': |
|
|
1196 { |
|
|
1197 if (string_width < 1) |
|
|
1198 { |
|
628
|
1199 // XXX FIXME XXX -- The code below is miscompiled on the Alpha with |
|
|
1200 // gcc 2.6.0, so that string_width is never incremented, even though |
|
|
1201 // reading the data works correctly. One fix is to use a fixed-size |
|
|
1202 // buffer... |
|
|
1203 // string_width = 8192; |
|
|
1204 |
|
1
|
1205 string_width = 0; |
|
|
1206 long original_position = ftell (fptr); |
|
628
|
1207 |
|
1
|
1208 int c; |
|
|
1209 |
|
636
|
1210 while ((c = getc (fptr)) != EOF && isspace (c)) |
|
1
|
1211 ; // Don't count leading whitespace. |
|
|
1212 |
|
|
1213 if (c != EOF) |
|
|
1214 string_width++; |
|
|
1215 |
|
|
1216 for (;;) |
|
|
1217 { |
|
|
1218 c = getc (fptr); |
|
636
|
1219 if (c != EOF && ! isspace (c)) |
|
1
|
1220 string_width++; |
|
|
1221 else |
|
|
1222 break; |
|
|
1223 } |
|
|
1224 |
|
|
1225 fseek (fptr, original_position, SEEK_SET); |
|
|
1226 } |
|
|
1227 chars_from_fmt_str++; |
|
636
|
1228 char temp [string_width+1]; |
|
1
|
1229 fmt << *s << ends; |
|
|
1230 char *str = fmt.str (); |
|
|
1231 success = fscanf (fptr, str, temp); |
|
|
1232 delete [] str; |
|
636
|
1233 temp[string_width] = '\0'; |
|
628
|
1234 if (success > 0 && store_value) |
|
636
|
1235 values(fmt_arg_count++) = temp; |
|
1
|
1236 } |
|
|
1237 break; |
|
628
|
1238 |
|
1
|
1239 case 'c': |
|
|
1240 { |
|
|
1241 if (string_width < 1) |
|
|
1242 string_width = 1; |
|
|
1243 chars_from_fmt_str++; |
|
636
|
1244 char temp [string_width+1]; |
|
1
|
1245 memset (temp, '\0', string_width+1); |
|
|
1246 fmt << *s << ends; |
|
|
1247 char *str = fmt.str (); |
|
|
1248 success = fscanf (fptr, str, temp); |
|
|
1249 delete [] str; |
|
|
1250 temp[string_width] = '\0'; |
|
|
1251 if (success > 0 && store_value) |
|
636
|
1252 values(fmt_arg_count++) = temp; |
|
1
|
1253 } |
|
|
1254 break; |
|
628
|
1255 |
|
1
|
1256 default: |
|
|
1257 goto invalid_format; |
|
|
1258 } |
|
|
1259 |
|
368
|
1260 if (success > 0) |
|
1
|
1261 return chars_from_fmt_str; |
|
368
|
1262 else if (success == 0) |
|
218
|
1263 warning ("%s: invalid conversion", type); |
|
1
|
1264 else if (success == EOF) |
|
|
1265 { |
|
|
1266 if (strcmp (type, "fscanf") == 0) |
|
218
|
1267 warning ("%s: end of file reached before final conversion", type); |
|
1
|
1268 else if (strcmp (type, "sscanf") == 0) |
|
218
|
1269 warning ("%s: end of string reached before final conversion", type); |
|
1
|
1270 else if (strcmp (type, "scanf") == 0) |
|
218
|
1271 warning ("%s: end of input reached before final conversion", type); |
|
1
|
1272 } |
|
|
1273 else |
|
|
1274 { |
|
|
1275 invalid_format: |
|
218
|
1276 warning ("%s: invalid format", type); |
|
1
|
1277 } |
|
|
1278 |
|
|
1279 return -1; |
|
|
1280 } |
|
|
1281 |
|
761
|
1282 // Formatted reading from a file. |
|
|
1283 |
|
712
|
1284 DEFUN ("fscanf", Ffscanf, Sfscanf, 2, -1, |
|
529
|
1285 "[A, B, C, ...] = fscanf (FILENAME or FILENUM, FORMAT)") |
|
|
1286 { |
|
|
1287 Octave_object retval; |
|
|
1288 |
|
|
1289 int nargin = args.length (); |
|
|
1290 |
|
712
|
1291 if (nargin != 1 && nargin != 2) |
|
529
|
1292 print_usage ("fscanf"); |
|
|
1293 else |
|
|
1294 retval = do_scanf ("fscanf", args, nargout); |
|
|
1295 |
|
|
1296 return retval; |
|
|
1297 } |
|
|
1298 |
|
761
|
1299 // Formatted reading. |
|
|
1300 |
|
712
|
1301 DEFUN ("scanf", Fscanf, Sscanf, 1, -1, |
|
529
|
1302 "[A, B, C, ...] = scanf (FORMAT)") |
|
|
1303 { |
|
|
1304 Octave_object retval; |
|
|
1305 |
|
|
1306 int nargin = args.length (); |
|
|
1307 |
|
712
|
1308 if (nargin != 1) |
|
529
|
1309 print_usage ("scanf"); |
|
|
1310 else |
|
|
1311 retval = do_scanf ("scanf", args, nargout); |
|
|
1312 |
|
|
1313 return retval; |
|
|
1314 } |
|
|
1315 |
|
761
|
1316 // Formatted reading from a string. |
|
|
1317 |
|
712
|
1318 DEFUN ("sscanf", Fsscanf, Ssscanf, 2, -1, |
|
529
|
1319 "[A, B, C, ...] = sscanf (STRING, FORMAT)") |
|
|
1320 { |
|
|
1321 Octave_object retval; |
|
|
1322 |
|
|
1323 int nargin = args.length (); |
|
|
1324 |
|
712
|
1325 if (nargin != 2) |
|
529
|
1326 print_usage ("sscanf"); |
|
|
1327 else |
|
|
1328 retval = do_scanf ("sscanf", args, nargout); |
|
|
1329 |
|
|
1330 return retval; |
|
|
1331 } |
|
|
1332 |
|
497
|
1333 Octave_object |
|
506
|
1334 do_scanf (const char *type, const Octave_object& args, int nargout) |
|
1
|
1335 { |
|
497
|
1336 Octave_object retval; |
|
529
|
1337 char *scanf_fmt = 0; |
|
|
1338 char *tmp_file = 0; |
|
1
|
1339 int tmp_file_open = 0; |
|
529
|
1340 FILE *fptr = 0; |
|
240
|
1341 file_info file; |
|
1
|
1342 |
|
|
1343 fmt_arg_count = 0; |
|
|
1344 |
|
|
1345 if (strcmp (type, "scanf") != 0) |
|
|
1346 { |
|
712
|
1347 scanf_fmt = args(1).string_value (); |
|
636
|
1348 |
|
|
1349 if (error_state) |
|
1
|
1350 { |
|
|
1351 error ("%s: format must be a string", type); |
|
|
1352 return retval; |
|
|
1353 } |
|
|
1354 } |
|
|
1355 |
|
|
1356 int doing_fscanf = (strcmp (type, "fscanf") == 0); |
|
|
1357 |
|
|
1358 if (doing_fscanf) |
|
|
1359 { |
|
712
|
1360 Pix p = file_io_get_file (args(0), "r", type); |
|
368
|
1361 |
|
529
|
1362 if (! p) |
|
368
|
1363 return retval; |
|
1
|
1364 |
|
|
1365 file = file_list (p); |
|
|
1366 |
|
|
1367 if (strcmp (file.mode (), "w") == 0 || strcmp (file.mode (), "a") == 0) |
|
|
1368 { |
|
|
1369 error ("%s: this file is opened for writing only", type); |
|
|
1370 return retval; |
|
|
1371 } |
|
|
1372 |
|
|
1373 fptr = file.fptr (); |
|
|
1374 } |
|
|
1375 |
|
712
|
1376 if ((! fptr && args(0).is_string ()) |
|
368
|
1377 || (doing_fscanf && file.number () == 0)) |
|
1
|
1378 { |
|
|
1379 char *string; |
|
|
1380 |
|
|
1381 if (strcmp (type, "scanf") == 0) |
|
712
|
1382 scanf_fmt = args(0).string_value (); |
|
1
|
1383 |
|
|
1384 if (strcmp (type, "scanf") == 0 |
|
|
1385 || (doing_fscanf && file.number () == 0)) |
|
|
1386 { |
|
870
|
1387 // XXX FIXME XXX -- this should probably be possible for more than |
|
|
1388 // just stdin/stdout pairs, using a list of output streams to flush. |
|
|
1389 // The list could be created with a function like iostream's tie(). |
|
|
1390 |
|
|
1391 flush_output_to_pager (); |
|
|
1392 |
|
1
|
1393 string = gnu_readline (""); |
|
870
|
1394 |
|
1
|
1395 if (string && *string) |
|
|
1396 maybe_save_history (string); |
|
|
1397 } |
|
|
1398 else |
|
712
|
1399 string = args(0).string_value (); |
|
1
|
1400 |
|
637
|
1401 tmp_file = octave_tmp_file_name (); |
|
1
|
1402 |
|
|
1403 fptr = fopen (tmp_file, "w+"); |
|
529
|
1404 if (! fptr) |
|
1
|
1405 { |
|
|
1406 error ("%s: error opening temporary file", type); |
|
|
1407 return retval; |
|
|
1408 } |
|
|
1409 tmp_file_open = 1; |
|
|
1410 unlink (tmp_file); |
|
|
1411 |
|
529
|
1412 if (! string) |
|
776
|
1413 { |
|
|
1414 error ("%s: no string to scan", type); |
|
|
1415 return retval; |
|
|
1416 } |
|
1
|
1417 |
|
|
1418 int success = fputs (string, fptr); |
|
|
1419 fflush (fptr); |
|
|
1420 rewind (fptr); |
|
|
1421 |
|
|
1422 if (success < 0) |
|
|
1423 { |
|
|
1424 error ("%s: trouble writing temporary file", type); |
|
|
1425 fclose (fptr); |
|
|
1426 return retval; |
|
|
1427 } |
|
|
1428 } |
|
|
1429 else if (! doing_fscanf) |
|
|
1430 { |
|
|
1431 error ("%s: first argument must be a string", type); |
|
|
1432 return retval; |
|
|
1433 } |
|
|
1434 |
|
|
1435 // Scan scanf_fmt for % escapes and assign the arguments. |
|
|
1436 |
|
636
|
1437 retval.resize (nargout); |
|
1
|
1438 |
|
|
1439 char *ptr = scanf_fmt; |
|
|
1440 |
|
|
1441 for (;;) |
|
|
1442 { |
|
|
1443 ostrstream fmt; |
|
|
1444 char c; |
|
|
1445 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1446 fmt << c; |
|
|
1447 |
|
|
1448 if (c == '\0') |
|
|
1449 break; |
|
|
1450 |
|
|
1451 if (*ptr == '%') |
|
|
1452 { |
|
|
1453 ptr++; |
|
|
1454 fmt << c; |
|
|
1455 continue; |
|
|
1456 } |
|
|
1457 |
|
|
1458 // We must be looking at a format specifier. Extract it or fail. |
|
|
1459 |
|
368
|
1460 int status = process_scanf_format (ptr, fmt, type, nargout, |
|
|
1461 fptr, retval); |
|
1
|
1462 |
|
|
1463 if (status < 0) |
|
|
1464 { |
|
|
1465 if (fmt_arg_count == 0) |
|
497
|
1466 retval.resize (0); |
|
1
|
1467 break; |
|
|
1468 } |
|
|
1469 |
|
|
1470 ptr += status; |
|
|
1471 } |
|
|
1472 |
|
|
1473 if (tmp_file_open) |
|
|
1474 fclose (fptr); |
|
|
1475 |
|
|
1476 return retval; |
|
|
1477 } |
|
|
1478 |
|
761
|
1479 // Find out how many elements are left to read. |
|
|
1480 |
|
444
|
1481 static long |
|
471
|
1482 num_items_remaining (FILE *fptr, char *type) |
|
444
|
1483 { |
|
471
|
1484 size_t size; |
|
|
1485 |
|
|
1486 if (strcasecmp (type, "uchar") == 0) |
|
|
1487 size = sizeof (u_char); |
|
|
1488 else if (strcasecmp (type, "char") == 0) |
|
|
1489 size = sizeof (char); |
|
|
1490 else if (strcasecmp (type, "short") == 0) |
|
|
1491 size = sizeof (short); |
|
|
1492 else if (strcasecmp (type, "ushort") == 0) |
|
|
1493 size = sizeof (u_short); |
|
|
1494 else if (strcasecmp (type, "int") == 0) |
|
|
1495 size = sizeof (int); |
|
|
1496 else if (strcasecmp (type, "uint") == 0) |
|
|
1497 size = sizeof (u_int); |
|
|
1498 else if (strcasecmp (type, "long") == 0) |
|
|
1499 size = sizeof (long); |
|
|
1500 else if (strcasecmp (type, "ulong") == 0) |
|
|
1501 size = sizeof (u_long); |
|
|
1502 else if (strcasecmp (type, "float") == 0) |
|
|
1503 size = sizeof (float); |
|
|
1504 else if (strcasecmp (type, "double") == 0) |
|
|
1505 size = sizeof (double); |
|
|
1506 else |
|
|
1507 return 0; |
|
|
1508 |
|
444
|
1509 long curr_pos = ftell (fptr); |
|
|
1510 |
|
|
1511 fseek (fptr, 0, SEEK_END); |
|
|
1512 long end_of_file = ftell (fptr); |
|
|
1513 |
|
471
|
1514 fseek (fptr, curr_pos, SEEK_SET); |
|
444
|
1515 |
|
|
1516 long len = end_of_file - curr_pos; |
|
|
1517 |
|
471
|
1518 return len / size; |
|
444
|
1519 } |
|
|
1520 |
|
712
|
1521 DEFUN ("fread", Ffread, Sfread, 3, 2, |
|
529
|
1522 "[DATA, COUNT] = fread (FILENUM, SIZE, PRECISION)\n\ |
|
|
1523 \n\ |
|
|
1524 Reads data in binary form of type PRECISION from a file.\n\ |
|
|
1525 \n\ |
|
|
1526 FILENUM : file number from fopen\n\ |
|
|
1527 SIZE : size specification for the Data matrix\n\ |
|
|
1528 PRECISION : type of data to read, valid types are\n\ |
|
|
1529 \n\ |
|
|
1530 'char', 'schar', 'short', 'int', 'long', 'float'\n\ |
|
|
1531 'double', 'uchar', 'ushort', 'uint', 'ulong'\n\ |
|
|
1532 \n\ |
|
|
1533 DATA : matrix in which the data is stored\n\ |
|
|
1534 COUNT : number of elements read") |
|
|
1535 { |
|
|
1536 Octave_object retval; |
|
|
1537 |
|
|
1538 int nargin = args.length (); |
|
|
1539 |
|
712
|
1540 if (nargin < 1 || nargin > 3) |
|
529
|
1541 print_usage ("fread"); |
|
|
1542 else |
|
|
1543 retval = fread_internal (args, nargout); |
|
|
1544 |
|
|
1545 return retval; |
|
|
1546 } |
|
|
1547 |
|
761
|
1548 // Read binary data from a file. |
|
|
1549 // |
|
|
1550 // [data, count] = fread (fid, size, 'precision') |
|
|
1551 // |
|
|
1552 // fid : the file id from fopen |
|
|
1553 // size : the size of the matrix or vector or scaler to read |
|
|
1554 // |
|
|
1555 // n : reads n elements of a column vector |
|
|
1556 // inf : reads to the end of file (default) |
|
|
1557 // [m, n] : reads enough elements to fill the matrix |
|
|
1558 // the number of columns can be inf |
|
|
1559 // |
|
|
1560 // precision : type of the element. Can be: |
|
|
1561 // |
|
|
1562 // char, uchar, schar, short, ushort, int, uint, |
|
|
1563 // long, ulong, float, double |
|
|
1564 // |
|
|
1565 // Default is uchar. |
|
|
1566 // |
|
|
1567 // data : output data |
|
|
1568 // count : number of elements read |
|
|
1569 |
|
497
|
1570 Octave_object |
|
506
|
1571 fread_internal (const Octave_object& args, int nargout) |
|
444
|
1572 { |
|
497
|
1573 Octave_object retval; |
|
444
|
1574 |
|
506
|
1575 int nargin = args.length (); |
|
|
1576 |
|
712
|
1577 Pix p = file_io_get_file (args(0), "r", "fread"); |
|
444
|
1578 |
|
529
|
1579 if (! p) |
|
444
|
1580 return retval; |
|
|
1581 |
|
|
1582 // Get type and number of bytes per element to read. |
|
|
1583 char *prec = "uchar"; |
|
712
|
1584 if (nargin > 2) |
|
444
|
1585 { |
|
712
|
1586 prec = args(2).string_value (); |
|
636
|
1587 |
|
|
1588 if (error_state) |
|
444
|
1589 { |
|
|
1590 error ("fread: precision must be a specified as a string"); |
|
|
1591 return retval; |
|
|
1592 } |
|
|
1593 } |
|
|
1594 |
|
471
|
1595 // Get file info. |
|
444
|
1596 |
|
|
1597 file_info file = file_list (p); |
|
471
|
1598 |
|
|
1599 FILE *fptr = file.fptr (); |
|
444
|
1600 |
|
|
1601 // Set up matrix to read into. If specified in arguments use that |
|
|
1602 // number, otherwise read everyting left in file. |
|
|
1603 |
|
471
|
1604 double dnr = 0.0; |
|
|
1605 double dnc = 0.0; |
|
|
1606 int nr; |
|
|
1607 int nc; |
|
444
|
1608 |
|
712
|
1609 if (nargin > 1) |
|
444
|
1610 { |
|
712
|
1611 if (args(1).is_scalar_type ()) |
|
444
|
1612 { |
|
712
|
1613 dnr = args(1).double_value (); |
|
636
|
1614 |
|
|
1615 if (error_state) |
|
|
1616 return retval; |
|
|
1617 |
|
471
|
1618 dnc = 1.0; |
|
444
|
1619 } |
|
636
|
1620 else |
|
444
|
1621 { |
|
712
|
1622 ColumnVector tmp = args(1).vector_value (); |
|
444
|
1623 |
|
636
|
1624 if (error_state || tmp.length () != 2) |
|
471
|
1625 { |
|
|
1626 error ("fread: invalid size specification\n"); |
|
|
1627 return retval; |
|
|
1628 } |
|
636
|
1629 |
|
|
1630 dnr = tmp.elem (0); |
|
|
1631 dnc = tmp.elem (1); |
|
471
|
1632 } |
|
|
1633 |
|
|
1634 if ((xisinf (dnr)) && (xisinf (dnc))) |
|
444
|
1635 { |
|
471
|
1636 error ("fread: number of rows and columns cannot both be infinite"); |
|
444
|
1637 return retval; |
|
|
1638 } |
|
|
1639 |
|
471
|
1640 if (xisinf (dnr)) |
|
|
1641 { |
|
1086
|
1642 if (xisnan (dnc)) |
|
|
1643 { |
|
|
1644 error ("fread: NaN invalid as the number of columns"); |
|
|
1645 return retval; |
|
|
1646 } |
|
|
1647 else |
|
|
1648 { |
|
|
1649 nc = NINT (dnc); |
|
|
1650 int n = num_items_remaining (fptr, prec); |
|
|
1651 nr = n / nc; |
|
|
1652 if (n > nr * nc) |
|
|
1653 nr++; |
|
|
1654 } |
|
471
|
1655 } |
|
|
1656 else if (xisinf (dnc)) |
|
|
1657 { |
|
1086
|
1658 if (xisnan (dnr)) |
|
|
1659 { |
|
|
1660 error ("fread: NaN invalid as the number of rows"); |
|
|
1661 return retval; |
|
|
1662 } |
|
|
1663 else |
|
|
1664 { |
|
|
1665 nr = NINT (dnr); |
|
|
1666 int n = num_items_remaining (fptr, prec); |
|
|
1667 nc = n / nr; |
|
|
1668 if (n > nc * nr) |
|
|
1669 nc++; |
|
|
1670 } |
|
471
|
1671 } |
|
|
1672 else |
|
|
1673 { |
|
1086
|
1674 if (xisnan (dnr)) |
|
|
1675 { |
|
|
1676 error ("fread: NaN invalid as the number of rows"); |
|
|
1677 return retval; |
|
|
1678 } |
|
|
1679 else |
|
|
1680 nr = NINT (dnr); |
|
|
1681 |
|
|
1682 if (xisnan (dnc)) |
|
|
1683 { |
|
|
1684 error ("fread: NaN invalid as the number of columns"); |
|
|
1685 return retval; |
|
|
1686 } |
|
|
1687 else |
|
|
1688 nc = NINT (dnc); |
|
471
|
1689 } |
|
444
|
1690 } |
|
|
1691 else |
|
|
1692 { |
|
|
1693 // No size parameter, read what's left of the file. |
|
471
|
1694 nc = 1; |
|
|
1695 int n = num_items_remaining (fptr, prec); |
|
|
1696 nr = n / nc; |
|
|
1697 if (n > nr * nc) |
|
|
1698 nr++; |
|
444
|
1699 } |
|
|
1700 |
|
|
1701 Matrix m (nr, nc, octave_NaN); |
|
|
1702 |
|
|
1703 // Read data. |
|
|
1704 |
|
471
|
1705 int count = m.read (fptr, prec); |
|
444
|
1706 |
|
|
1707 if (nargout > 1) |
|
636
|
1708 retval(1) = (double) count; |
|
444
|
1709 |
|
636
|
1710 retval(0) = m; |
|
444
|
1711 |
|
|
1712 return retval; |
|
|
1713 } |
|
|
1714 |
|
712
|
1715 DEFUN ("fwrite", Ffwrite, Sfwrite, 3, 1, |
|
529
|
1716 "COUNT = fwrite (FILENUM, DATA, PRECISION)\n\ |
|
|
1717 \n\ |
|
|
1718 Writes data to a file in binary form of size PRECISION\n\ |
|
|
1719 \n\ |
|
|
1720 FILENUM : file number from fopen\n\ |
|
|
1721 DATA : matrix of elements to be written\n\ |
|
|
1722 PRECISION : type of data to read, valid types are\n\ |
|
|
1723 \n\ |
|
|
1724 'char', 'schar', 'short', 'int', 'long', 'float'\n\ |
|
|
1725 'double', 'uchar', 'ushort', 'uint', 'ulong'\n\ |
|
|
1726 \n\ |
|
|
1727 COUNT : number of elements written") |
|
|
1728 { |
|
|
1729 Octave_object retval; |
|
|
1730 |
|
|
1731 int nargin = args.length (); |
|
|
1732 |
|
712
|
1733 if (nargin < 2 || nargin > 3) |
|
529
|
1734 print_usage ("fwrite"); |
|
|
1735 else |
|
|
1736 retval = fwrite_internal (args, nargout); |
|
|
1737 |
|
|
1738 return retval; |
|
|
1739 } |
|
|
1740 |
|
761
|
1741 // Write binary data to a file. |
|
|
1742 // |
|
|
1743 // count = fwrite (fid, data, 'precision') |
|
|
1744 // |
|
|
1745 // fid : file id from fopen |
|
|
1746 // Data : data to be written |
|
|
1747 // precision : type of output element. Can be: |
|
|
1748 // |
|
|
1749 // char, uchar, schar, short, ushort, int, uint, |
|
|
1750 // long, float, double |
|
|
1751 // |
|
|
1752 // Default is uchar. |
|
|
1753 // |
|
|
1754 // count : the number of elements written |
|
|
1755 |
|
497
|
1756 Octave_object |
|
506
|
1757 fwrite_internal (const Octave_object& args, int nargout) |
|
444
|
1758 { |
|
497
|
1759 Octave_object retval; |
|
444
|
1760 |
|
506
|
1761 int nargin = args.length (); |
|
|
1762 |
|
761
|
1763 Pix p = file_io_get_file (args(0), "a+", "fwrite"); |
|
444
|
1764 |
|
529
|
1765 if (! p) |
|
444
|
1766 return retval; |
|
|
1767 |
|
|
1768 // Get type and number of bytes per element to read. |
|
|
1769 char *prec = "uchar"; |
|
712
|
1770 if (nargin > 2) |
|
444
|
1771 { |
|
761
|
1772 prec = args(2).string_value (); |
|
636
|
1773 |
|
|
1774 if (error_state) |
|
444
|
1775 { |
|
|
1776 error ("fwrite: precision must be a specified as a string"); |
|
|
1777 return retval; |
|
|
1778 } |
|
|
1779 } |
|
|
1780 |
|
|
1781 file_info file = file_list (p); |
|
|
1782 |
|
761
|
1783 Matrix m = args(1).matrix_value (); |
|
444
|
1784 |
|
636
|
1785 if (! error_state) |
|
|
1786 { |
|
|
1787 int count = m.write (file.fptr (), prec); |
|
444
|
1788 |
|
636
|
1789 retval(0) = (double) count; |
|
|
1790 } |
|
444
|
1791 |
|
|
1792 return retval; |
|
|
1793 } |
|
|
1794 |
|
712
|
1795 DEFUN ("feof", Ffeof, Sfeof, 1, 1, |
|
529
|
1796 "ERROR = feof (FILENAME or FILENUM)\n\ |
|
|
1797 \n\ |
|
|
1798 Returns a non zero value for an end of file condition for the\n\ |
|
|
1799 file specified by FILENAME or FILENUM from fopen") |
|
|
1800 { |
|
|
1801 Octave_object retval; |
|
|
1802 |
|
|
1803 int nargin = args.length (); |
|
|
1804 |
|
712
|
1805 if (nargin != 1) |
|
529
|
1806 print_usage ("feof"); |
|
|
1807 else |
|
|
1808 retval = feof_internal (args, nargout); |
|
|
1809 |
|
|
1810 return retval; |
|
|
1811 } |
|
|
1812 |
|
761
|
1813 // Check for an EOF condition on a file opened by fopen. |
|
|
1814 // |
|
|
1815 // eof = feof (fid) |
|
|
1816 // |
|
|
1817 // fid : file id from fopen |
|
|
1818 // eof : non zero for an end of file condition |
|
|
1819 |
|
497
|
1820 Octave_object |
|
506
|
1821 feof_internal (const Octave_object& args, int nargout) |
|
444
|
1822 { |
|
497
|
1823 Octave_object retval; |
|
444
|
1824 |
|
|
1825 // Get file info. |
|
1049
|
1826 Pix p = return_valid_file (args(0)); |
|
444
|
1827 |
|
529
|
1828 if (! p) |
|
444
|
1829 return retval; |
|
|
1830 |
|
|
1831 file_info file = file_list (p); |
|
|
1832 |
|
529
|
1833 retval(0) = (double) feof (file.fptr ()); |
|
|
1834 |
|
|
1835 return retval; |
|
|
1836 } |
|
|
1837 |
|
712
|
1838 DEFUN ("ferror", Fferror, Sferror, 1, 1, |
|
529
|
1839 "ERROR = ferror (FILENAME or FILENUM)\n\ |
|
|
1840 \n\ |
|
|
1841 Returns a non zero value for an error condition on the\n\ |
|
|
1842 file specified by FILENAME or FILENUM from fopen") |
|
|
1843 { |
|
|
1844 Octave_object retval; |
|
|
1845 |
|
|
1846 int nargin = args.length (); |
|
|
1847 |
|
712
|
1848 if (nargin != 1) |
|
529
|
1849 print_usage ("ferror"); |
|
|
1850 else |
|
|
1851 retval = ferror_internal (args, nargout); |
|
444
|
1852 |
|
|
1853 return retval; |
|
|
1854 } |
|
|
1855 |
|
761
|
1856 // Check for an error condition on a file opened by fopen. |
|
|
1857 // |
|
|
1858 // [message, errnum] = ferror (fid) |
|
|
1859 // |
|
|
1860 // fid : file id from fopen |
|
|
1861 // message : system error message |
|
|
1862 // errnum : error number |
|
|
1863 |
|
497
|
1864 Octave_object |
|
506
|
1865 ferror_internal (const Octave_object& args, int nargout) |
|
444
|
1866 { |
|
497
|
1867 Octave_object retval; |
|
444
|
1868 |
|
|
1869 // Get file info. |
|
712
|
1870 Pix p = return_valid_file (args(0)); |
|
444
|
1871 |
|
529
|
1872 if (! p) |
|
444
|
1873 return retval; |
|
|
1874 |
|
|
1875 file_info file = file_list (p); |
|
|
1876 |
|
|
1877 int ierr = ferror (file.fptr ()); |
|
|
1878 |
|
|
1879 if (nargout > 1) |
|
636
|
1880 retval(1) = (double) ierr; |
|
444
|
1881 |
|
636
|
1882 retval(0) = strsave (strerror (ierr)); |
|
444
|
1883 |
|
|
1884 return retval; |
|
|
1885 } |
|
|
1886 |
|
|
1887 /* |
|
1
|
1888 ;;; Local Variables: *** |
|
|
1889 ;;; mode: C++ *** |
|
|
1890 ;;; page-delimiter: "^/\\*" *** |
|
|
1891 ;;; End: *** |
|
|
1892 */ |
