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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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332
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4 Copyright (C) 1993, 1994 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 how many files are open and in the file list |
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56 static int file_count = 0; |
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57 |
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58 // keeps a count of args sent to printf or scanf |
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59 static int fmt_arg_count = 0; |
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60 |
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240
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61 class file_info |
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1
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62 { |
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63 public: |
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240
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64 file_info (void); |
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65 file_info (int num, const char *nm, FILE *t, const char *md); |
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66 file_info (const file_info& f); |
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67 |
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240
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68 file_info& operator = (const file_info& f); |
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69 |
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240
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70 ~file_info (void); |
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71 |
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72 int number (void) const; |
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240
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73 const char *name (void) const; |
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74 FILE *fptr (void) const; |
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240
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75 const char *mode (void) const; |
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76 |
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444
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77 int eof (void) const; |
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78 int error (void) const; |
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79 |
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80 private: |
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334
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81 int file_number; |
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82 char *file_name; |
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83 FILE *file_fptr; |
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84 char *file_mode; |
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1
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85 }; |
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86 |
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240
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87 file_info::file_info (void) |
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88 { |
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334
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89 file_number = -1; |
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529
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90 file_name = 0; |
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91 file_fptr = 0; |
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92 file_mode = 0; |
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93 } |
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94 |
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240
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95 file_info::file_info (int n, const char *nm, FILE *t, const char *md) |
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96 { |
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334
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97 file_number = n; |
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98 file_name = strsave (nm); |
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99 file_fptr = t; |
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100 file_mode = strsave (md); |
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240
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101 } |
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102 |
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103 file_info::file_info (const file_info& 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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106 file_name = strsave (f.file_name); |
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107 file_fptr = f.file_fptr; |
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108 file_mode = strsave (f.file_mode); |
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109 } |
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110 |
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240
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111 file_info& |
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112 file_info::operator = (const file_info& f) |
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113 { |
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240
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114 if (this != & f) |
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115 { |
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367
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116 file_number = f.file_number; |
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334
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117 delete [] file_name; |
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118 file_name = strsave (f.file_name); |
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119 file_fptr = f.file_fptr; |
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120 delete [] file_mode; |
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121 file_mode = strsave (f.file_mode); |
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240
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122 } |
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123 return *this; |
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124 } |
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125 |
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240
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126 file_info::~file_info (void) |
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127 { |
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334
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128 delete [] file_name; |
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129 delete [] file_mode; |
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130 } |
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131 |
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132 int |
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240
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133 file_info::number (void) const |
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134 { |
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334
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135 return file_number; |
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136 } |
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137 |
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240
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138 const char * |
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139 file_info::name (void) const |
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140 { |
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334
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141 return file_name; |
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142 } |
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143 |
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144 FILE * |
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240
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145 file_info::fptr (void) const |
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146 { |
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334
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147 return file_fptr; |
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148 } |
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149 |
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240
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150 const char * |
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151 file_info::mode (void) const |
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152 { |
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334
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153 return file_mode; |
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154 } |
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155 |
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156 // double linked list containing relevant information about open files |
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240
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157 static DLList <file_info> file_list; |
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158 |
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159 void |
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164
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160 initialize_file_io (void) |
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161 { |
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334
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162 file_info octave_stdin (0, "stdin", stdin, "r"); |
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163 file_info octave_stdout (1, "stdout", stdout, "w"); |
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164 file_info octave_stderr (2, "stderr", stderr, "w"); |
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165 |
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334
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166 file_list.append (octave_stdin); |
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167 file_list.append (octave_stdout); |
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168 file_list.append (octave_stderr); |
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169 |
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170 file_count = 3; |
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171 } |
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172 |
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444
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173 /* |
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174 * Given a file name or number, return a pointer to the corresponding |
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175 * open file. If the file has not already been opened, return NULL. |
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176 */ |
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1
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177 Pix |
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164
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178 return_valid_file (const tree_constant& arg) |
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179 { |
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610
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180 if (arg.is_string ()) |
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1
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181 { |
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182 Pix p = file_list.first (); |
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240
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183 file_info file; |
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1
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184 for (int i = 0; i < file_count; i++) |
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185 { |
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186 char *file_name = arg.string_value (); |
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187 file = file_list (p); |
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188 if (strcmp (file.name (), file_name) == 0) |
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189 return p; |
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190 file_list.next (p); |
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191 } |
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192 } |
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193 else if (arg.is_scalar_type ()) |
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194 { |
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195 double file_num = arg.double_value (); |
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196 if ((double) NINT (file_num) != file_num) |
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197 error ("file number not an integer value"); |
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198 else |
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199 { |
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200 Pix p = file_list.first (); |
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240
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201 file_info file; |
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1
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202 for (int i = 0; i < file_count; i++) |
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203 { |
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204 file = file_list (p); |
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205 if (file.number () == file_num) |
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206 return p; |
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207 file_list.next (p); |
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208 } |
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209 error ("no file with that number"); |
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210 } |
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211 } |
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212 else |
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213 error ("inapproriate file specifier"); |
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214 |
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529
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215 return 0; |
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1
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216 } |
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217 |
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218 static Pix |
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370
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219 fopen_file_for_user (const tree_constant& arg, const char *mode, |
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220 const char *warn_for) |
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1
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221 { |
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222 char *file_name = arg.string_value (); |
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223 |
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224 FILE *file_ptr = fopen (file_name, mode); |
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529
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225 if (file_ptr) |
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226 { |
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240
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227 file_info file (++file_count, file_name, file_ptr, mode); |
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228 file_list.append (file); |
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229 |
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230 Pix p = file_list.first (); |
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240
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231 file_info file_from_list; |
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232 |
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233 for (int i = 0; i < file_count; i++) |
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234 { |
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235 file_from_list = file_list (p); |
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236 if (strcmp (file_from_list.name (), file_name) == 0) |
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237 return p; |
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238 file_list.next (p); |
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239 } |
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240 } |
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241 |
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370
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242 error ("%s: unable to open file `%s'", warn_for, file_name); |
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240
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243 |
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529
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244 return 0; |
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245 } |
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246 |
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368
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247 static Pix |
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248 file_io_get_file (const tree_constant arg, const char *mode, |
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249 const char *warn_for) |
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250 { |
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251 Pix p = return_valid_file (arg); |
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252 |
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529
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253 if (! p) |
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368
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254 { |
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610
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255 if (arg.is_string ()) |
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368
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256 { |
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257 char *name = arg.string_value (); |
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258 |
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259 struct stat buffer; |
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260 int status = stat (name, &buffer); |
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261 |
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372
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262 if (status == 0) |
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368
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263 { |
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264 if ((buffer.st_mode & S_IFREG) == S_IFREG) |
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370
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265 p = fopen_file_for_user (arg, mode, warn_for); |
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368
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266 else |
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267 error ("%s: invalid file type", warn_for); |
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268 } |
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372
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269 else if (status < 0 && *mode != 'r') |
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270 p = fopen_file_for_user (arg, mode, warn_for); |
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368
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271 else |
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272 error ("%s: can't stat file `%s'", warn_for, name); |
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273 } |
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274 else |
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275 error ("%s: invalid file specifier", warn_for); |
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276 } |
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277 |
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278 return p; |
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279 } |
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280 |
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529
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281 DEFUN ("fclose", Ffclose, Sfclose, 2, 1, |
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282 "fclose (FILENAME or FILENUM): close a file") |
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283 { |
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284 Octave_object retval; |
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285 |
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286 int nargin = args.length (); |
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287 |
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288 if (nargin != 2) |
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289 print_usage ("fclose"); |
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290 else |
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291 retval = fclose_internal (args); |
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292 |
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293 return retval; |
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294 } |
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295 |
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497
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296 Octave_object |
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297 fclose_internal (const Octave_object& args) |
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1
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298 { |
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497
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299 Octave_object retval; |
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1
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300 |
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497
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301 Pix p = return_valid_file (args(1)); |
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302 |
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529
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303 if (! p) |
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1
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304 return retval; |
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305 |
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240
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306 file_info file = file_list (p); |
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307 |
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308 if (file.number () < 3) |
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309 { |
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310 warning ("fclose: can't close stdin, stdout, or stderr!"); |
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311 return retval; |
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312 } |
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313 |
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314 int success = fclose (file.fptr ()); |
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315 file_list.del (p); |
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316 file_count--; |
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317 |
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497
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318 retval.resize (1); |
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1
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319 if (success == 0) |
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497
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320 retval(0) = tree_constant (1.0); // succeeded |
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1
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321 else |
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322 { |
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323 error ("fclose: error on closing file"); |
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497
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324 retval(0) = tree_constant (0.0); // failed |
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1
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325 } |
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326 |
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327 return retval; |
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328 } |
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329 |
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529
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330 DEFUN ("fflush", Ffflush, Sfflush, 2, 1, |
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331 "fflush (FILENAME or FILENUM): flush buffered data to output file") |
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332 { |
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333 Octave_object retval; |
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334 |
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335 int nargin = args.length (); |
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336 |
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337 if (nargin != 2) |
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338 print_usage ("fflush"); |
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339 else |
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340 retval = fflush_internal (args); |
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341 |
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342 return retval; |
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343 } |
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344 |
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497
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345 Octave_object |
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346 fflush_internal (const Octave_object& args) |
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1
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347 { |
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497
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348 Octave_object retval; |
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1
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349 |
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497
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350 Pix p = return_valid_file (args(1)); |
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1
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351 |
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529
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352 if (! p) |
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1
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353 return retval; |
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354 |
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240
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355 file_info file = file_list (p); |
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1
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356 |
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357 if (strcmp (file.mode (), "r") == 0) |
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358 { |
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359 warning ("can't flush an input stream"); |
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360 return retval; |
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361 } |
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362 |
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363 int success = 0; |
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240
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364 |
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1
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365 if (file.number () == 1) |
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366 flush_output_to_pager (); |
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367 else |
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368 success = fflush (file.fptr ()); |
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369 |
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497
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370 retval.resize (1); |
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1
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371 if (success == 0) |
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497
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372 retval(0) = tree_constant (1.0); // succeeded |
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1
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373 else |
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374 { |
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375 error ("fflush: write error"); |
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497
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376 retval(0) = tree_constant (0.0); // failed |
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1
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377 } |
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378 |
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379 return retval; |
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380 } |
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381 |
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382 static int |
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164
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383 valid_mode (const char *mode) |
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1
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384 { |
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529
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385 if (mode) |
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1
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386 { |
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387 char m = mode[0]; |
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388 if (m == 'r' || m == 'w' || m == 'a') |
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389 { |
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390 m = mode[1]; |
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391 return (m == '\0' || (m == '+' && mode[2] == '\0')); |
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392 } |
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393 } |
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394 return 0; |
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395 } |
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396 |
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529
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397 DEFUN ("fgets", Ffgets, Sfgets, 3, 2, |
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398 "[STRING, LENGTH] = fgets (FILENAME or FILENUM, LENGTH)\n\ |
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399 \n\ |
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400 read a string from a file") |
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401 { |
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402 Octave_object retval; |
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403 |
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404 int nargin = args.length (); |
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405 |
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406 if (nargin != 3) |
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407 print_usage ("fgets"); |
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408 else |
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409 retval = fgets_internal (args, nargout); |
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410 |
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411 return retval; |
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412 } |
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413 |
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497
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414 Octave_object |
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415 fgets_internal (const Octave_object& args, int nargout) |
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1
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416 { |
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497
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417 Octave_object retval; |
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1
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418 |
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497
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419 Pix p = file_io_get_file (args(1), "r", "fgets"); |
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1
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420 |
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529
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421 if (! p) |
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368
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422 return retval; |
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423 |
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1
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424 int length = 0; |
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497
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425 if (args(2).is_scalar_type ()) |
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1
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426 { |
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497
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427 length = (int) args(2).double_value (); |
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1
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428 if ((double) NINT (length) != length) |
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429 { |
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430 error ("fgets: length not an integer value"); |
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431 return retval; |
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432 } |
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433 } |
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434 |
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368
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435 file_info file = file_list (p); |
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436 |
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1
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437 char string[length+1]; |
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438 char *success = fgets (string, length+1, file.fptr ()); |
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439 |
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529
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440 if (! success) |
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1
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441 { |
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497
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442 retval.resize (1); |
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443 retval(0) = tree_constant (-1.0); |
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1
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444 return retval; |
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445 } |
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446 |
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447 if (nargout == 2) |
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448 { |
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497
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449 retval.resize (2); |
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450 retval(1) = tree_constant ((double) strlen (string)); |
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1
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451 } |
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452 else |
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497
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453 retval.resize (1); |
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1
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454 |
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497
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455 retval(0) = tree_constant (string); |
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1
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456 |
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457 return retval; |
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458 } |
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459 |
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529
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460 DEFUN ("fopen", Ffopen, Sfopen, 3, 1, |
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461 "FILENUM = fopen (FILENAME, MODE): open a file\n\ |
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462 \n\ |
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463 Valid values for mode include:\n\ |
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464 \n\ |
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465 r : open text file for reading\n\ |
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466 w : open text file for writing; discard previous contents if any\n\ |
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|
467 a : append; open or create text file for writing at end of file\n\ |
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|
468 r+ : open text file for update (i.e., reading and writing)\n\ |
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|
469 w+ : create text file for update; discard previous contents if any\n\ |
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|
470 a+ : append; open or create text file for update, writing at end\n\n\ |
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|
471 Update mode permits reading from and writing to the same file.") |
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|
472 { |
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473 Octave_object retval; |
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474 |
|
|
475 int nargin = args.length (); |
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|
476 |
|
|
477 if (nargin != 3) |
|
|
478 print_usage ("fopen"); |
|
|
479 else |
|
|
480 retval = fopen_internal (args); |
|
|
481 |
|
|
482 return retval; |
|
|
483 } |
|
|
484 |
|
497
|
485 Octave_object |
|
|
486 fopen_internal (const Octave_object& args) |
|
1
|
487 { |
|
497
|
488 Octave_object retval; |
|
1
|
489 Pix p; |
|
|
490 |
|
610
|
491 if (! args(1).is_string ()) |
|
1
|
492 { |
|
|
493 error ("fopen: file name must be a string"); |
|
|
494 return retval; |
|
|
495 } |
|
|
496 |
|
497
|
497 p = return_valid_file (args(1)); |
|
1
|
498 |
|
529
|
499 if (p) |
|
1
|
500 { |
|
240
|
501 file_info file = file_list (p); |
|
1
|
502 |
|
497
|
503 retval.resize (1); |
|
|
504 retval(0) = tree_constant ((double) file.number ()); |
|
1
|
505 |
|
|
506 return retval; |
|
|
507 } |
|
|
508 |
|
610
|
509 if (! args(2).is_string ()) |
|
1
|
510 { |
|
370
|
511 error ("fopen: file mode must be a string"); |
|
1
|
512 return retval; |
|
|
513 } |
|
|
514 |
|
497
|
515 char *name = args(1).string_value (); |
|
|
516 char *mode = args(2).string_value (); |
|
1
|
517 |
|
|
518 if (! valid_mode (mode)) |
|
|
519 { |
|
|
520 error ("fopen: invalid mode"); |
|
|
521 return retval; |
|
|
522 } |
|
|
523 |
|
|
524 struct stat buffer; |
|
|
525 if (stat (name, &buffer) == 0 && (buffer.st_mode & S_IFDIR) == S_IFDIR) |
|
|
526 { |
|
|
527 error ("fopen: can't open directory"); |
|
|
528 return retval; |
|
|
529 } |
|
|
530 |
|
|
531 FILE *file_ptr = fopen (name, mode); |
|
|
532 |
|
529
|
533 if (! file_ptr) |
|
1
|
534 { |
|
370
|
535 error ("fopen: unable to open file `%s'", name); |
|
1
|
536 return retval; |
|
|
537 } |
|
|
538 |
|
|
539 int number = file_count++; |
|
|
540 |
|
240
|
541 file_info file (number, name, file_ptr, mode); |
|
1
|
542 file_list.append (file); |
|
|
543 |
|
497
|
544 retval.resize (1); |
|
|
545 retval(0) = tree_constant ((double) number); |
|
1
|
546 |
|
|
547 return retval; |
|
|
548 } |
|
|
549 |
|
529
|
550 DEFUN ("freport", Ffreport, Sfreport, 1, 1, |
|
|
551 "freport (): list open files and their status") |
|
|
552 { |
|
|
553 Octave_object retval; |
|
|
554 |
|
|
555 int nargin = args.length (); |
|
|
556 |
|
|
557 if (nargin > 1) |
|
|
558 warning ("freport: ignoring extra arguments"); |
|
|
559 |
|
|
560 retval = freport_internal (); |
|
|
561 |
|
|
562 return retval; |
|
|
563 } |
|
|
564 |
|
497
|
565 Octave_object |
|
164
|
566 freport_internal (void) |
|
1
|
567 { |
|
497
|
568 Octave_object retval; |
|
1
|
569 Pix p = file_list.first (); |
|
|
570 |
|
|
571 ostrstream output_buf; |
|
|
572 |
|
|
573 output_buf << "\n number mode name\n\n"; |
|
|
574 for (int i = 0; i < file_count; i++) |
|
|
575 { |
|
240
|
576 file_info file = file_list (p); |
|
1
|
577 output_buf.form ("%7d%6s %s\n", file.number (), file.mode (), |
|
|
578 file.name ()); |
|
|
579 file_list.next (p); |
|
|
580 } |
|
|
581 |
|
|
582 output_buf << "\n" << ends; |
|
|
583 maybe_page_output (output_buf); |
|
|
584 |
|
|
585 return retval; |
|
|
586 } |
|
|
587 |
|
529
|
588 DEFUN ("frewind", Ffrewind, Sfrewind, 2, 1, |
|
|
589 "frewind (FILENAME or FILENUM): set file position at beginning of file") |
|
|
590 { |
|
|
591 Octave_object retval; |
|
|
592 |
|
|
593 int nargin = args.length (); |
|
|
594 |
|
|
595 if (nargin != 2) |
|
|
596 print_usage ("frewind"); |
|
|
597 else |
|
|
598 retval = frewind_internal (args); |
|
|
599 |
|
|
600 return retval; |
|
|
601 } |
|
|
602 |
|
497
|
603 Octave_object |
|
|
604 frewind_internal (const Octave_object& args) |
|
1
|
605 { |
|
497
|
606 Octave_object retval; |
|
1
|
607 |
|
497
|
608 Pix p = file_io_get_file (args(1), "a+", "frewind"); |
|
1
|
609 |
|
529
|
610 if (p) |
|
368
|
611 { |
|
|
612 file_info file = file_list (p); |
|
|
613 rewind (file.fptr ()); |
|
|
614 } |
|
1
|
615 |
|
|
616 return retval; |
|
|
617 } |
|
|
618 |
|
529
|
619 DEFUN ("fseek", Ffseek, Sfseek, 4, 1, |
|
|
620 "fseek (FILENAME or FILENUM, OFFSET [, ORIGIN])\n\ |
|
|
621 \n\ |
|
|
622 set file position for reading or writing") |
|
|
623 { |
|
|
624 Octave_object retval; |
|
|
625 |
|
|
626 int nargin = args.length (); |
|
|
627 |
|
|
628 if (nargin != 3 && nargin != 4) |
|
|
629 print_usage ("fseek"); |
|
|
630 else |
|
|
631 retval = fseek_internal (args); |
|
|
632 |
|
|
633 return retval; |
|
|
634 } |
|
|
635 |
|
497
|
636 Octave_object |
|
506
|
637 fseek_internal (const Octave_object& args) |
|
1
|
638 { |
|
497
|
639 Octave_object retval; |
|
1
|
640 |
|
506
|
641 int nargin = args.length (); |
|
|
642 |
|
497
|
643 Pix p = file_io_get_file (args(1), "a+", "fseek"); |
|
1
|
644 |
|
529
|
645 if (! p) |
|
368
|
646 return retval; |
|
1
|
647 |
|
|
648 long origin = SEEK_SET; |
|
|
649 long offset = 0; |
|
497
|
650 if (args(2).is_scalar_type ()) |
|
1
|
651 { |
|
497
|
652 offset = (long) args(2).double_value (); |
|
1
|
653 if ((double) NINT (offset) != offset) |
|
|
654 { |
|
|
655 error ("fseek: offset not an integer value"); |
|
|
656 return retval; |
|
|
657 } |
|
|
658 } |
|
|
659 |
|
497
|
660 if (nargin == 4 && args(3).is_scalar_type ()) |
|
1
|
661 { |
|
497
|
662 origin = (long) args(3).double_value (); |
|
1
|
663 if (origin == -1) |
|
|
664 origin = SEEK_CUR; |
|
|
665 else if (origin == -2) |
|
|
666 origin = SEEK_END; |
|
|
667 else |
|
|
668 { |
|
|
669 if ((double) NINT (origin) != origin) |
|
|
670 { |
|
|
671 error ("fseek: origin not an integer value"); |
|
|
672 return retval; |
|
|
673 } |
|
|
674 } |
|
|
675 } |
|
|
676 |
|
240
|
677 file_info file = file_list (p); |
|
1
|
678 int success = fseek (file.fptr (), offset, origin); |
|
497
|
679 retval.resize (1); |
|
1
|
680 |
|
|
681 if (success == 0) |
|
497
|
682 retval(0) = tree_constant (1.0); // succeeded |
|
1
|
683 else |
|
|
684 { |
|
|
685 error ("fseek: file error"); |
|
497
|
686 retval(0) = tree_constant (0.0); // failed |
|
1
|
687 } |
|
|
688 |
|
|
689 return retval; |
|
|
690 } |
|
|
691 |
|
529
|
692 /* |
|
|
693 * Tell current position of file. |
|
|
694 */ |
|
|
695 DEFUN ("ftell", Fftell, Sftell, 2, 1, |
|
|
696 "POSITION = ftell (FILENAME or FILENUM): returns the current file position") |
|
|
697 { |
|
|
698 Octave_object retval; |
|
|
699 |
|
|
700 int nargin = args.length (); |
|
|
701 |
|
|
702 if (nargin != 2) |
|
|
703 print_usage ("ftell"); |
|
|
704 else |
|
|
705 retval = ftell_internal (args); |
|
|
706 |
|
|
707 return retval; |
|
|
708 } |
|
|
709 |
|
497
|
710 Octave_object |
|
|
711 ftell_internal (const Octave_object& args) |
|
1
|
712 { |
|
497
|
713 Octave_object retval; |
|
1
|
714 |
|
497
|
715 Pix p = file_io_get_file (args(1), "a+", "ftell"); |
|
1
|
716 |
|
529
|
717 if (p) |
|
368
|
718 { |
|
|
719 file_info file = file_list (p); |
|
|
720 long offset = ftell (file.fptr ()); |
|
497
|
721 retval.resize (1); |
|
|
722 retval(0) = tree_constant ((double) offset); |
|
1
|
723 |
|
368
|
724 if (offset == -1L) |
|
|
725 error ("ftell: write error"); |
|
|
726 } |
|
1
|
727 |
|
|
728 return retval; |
|
|
729 } |
|
|
730 |
|
|
731 void |
|
164
|
732 close_files (void) |
|
1
|
733 { |
|
|
734 Pix p = file_list.first (); |
|
|
735 |
|
|
736 for (int i = 0; i < file_count; i++) |
|
|
737 { |
|
240
|
738 file_info file = file_list (p); |
|
1
|
739 if (i > 2) // do not close stdin, stdout, stderr! |
|
|
740 { |
|
|
741 int success = fclose (file.fptr ()); |
|
|
742 if (success != 0) |
|
|
743 error ("closing %s", file.name ()); |
|
|
744 } |
|
|
745 file_list.del (p); |
|
|
746 } |
|
|
747 } |
|
|
748 |
|
|
749 static int |
|
497
|
750 process_printf_format (const char *s, const Octave_object& args, |
|
506
|
751 ostrstream& sb, const char *type) |
|
1
|
752 { |
|
|
753 ostrstream fmt; |
|
|
754 |
|
506
|
755 int nargin = args.length (); |
|
|
756 |
|
1
|
757 fmt << "%"; // do_printf() already blew past this one... |
|
|
758 |
|
|
759 int chars_from_fmt_str = 0; |
|
|
760 |
|
|
761 again: |
|
|
762 switch (*s) |
|
|
763 { |
|
|
764 case '+': case '-': case ' ': case '0': case '#': |
|
|
765 chars_from_fmt_str++; |
|
|
766 fmt << *s++; |
|
|
767 goto again; |
|
|
768 |
|
|
769 case '\0': |
|
|
770 goto invalid_format; |
|
|
771 |
|
|
772 default: |
|
|
773 break; |
|
|
774 } |
|
|
775 |
|
|
776 if (*s == '*') |
|
|
777 { |
|
|
778 if (fmt_arg_count >= nargin) |
|
|
779 { |
|
218
|
780 error ("%s: not enough arguments", type); |
|
1
|
781 return -1; |
|
|
782 } |
|
|
783 |
|
598
|
784 if (! args(fmt_arg_count).is_scalar_type ()) |
|
1
|
785 { |
|
218
|
786 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
787 return -1; |
|
|
788 } |
|
|
789 |
|
497
|
790 fmt << NINT (args(fmt_arg_count++).double_value ()); |
|
1
|
791 s++; |
|
|
792 chars_from_fmt_str++; |
|
|
793 } |
|
|
794 else |
|
|
795 { |
|
|
796 while (*s != '\0' && isdigit (*s)) |
|
|
797 { |
|
|
798 chars_from_fmt_str++; |
|
|
799 fmt << *s++; |
|
|
800 } |
|
|
801 } |
|
|
802 |
|
|
803 if (*s == '\0') |
|
|
804 goto invalid_format; |
|
|
805 |
|
|
806 if (*s == '.') |
|
|
807 { |
|
|
808 chars_from_fmt_str++; |
|
|
809 fmt << *s++; |
|
|
810 } |
|
|
811 |
|
|
812 if (*s == '*') |
|
|
813 { |
|
|
814 if (*(s-1) == '*') |
|
|
815 goto invalid_format; |
|
|
816 |
|
|
817 if (fmt_arg_count >= nargin) |
|
|
818 { |
|
218
|
819 error ("%s: not enough arguments", type); |
|
1
|
820 return -1; |
|
|
821 } |
|
|
822 |
|
598
|
823 if (! args(fmt_arg_count).is_scalar_type ()) |
|
1
|
824 { |
|
218
|
825 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
826 return -1; |
|
|
827 } |
|
|
828 |
|
497
|
829 fmt << NINT (args(fmt_arg_count++).double_value ()); |
|
1
|
830 s++; |
|
|
831 chars_from_fmt_str++; |
|
|
832 } |
|
|
833 else |
|
|
834 { |
|
|
835 while (*s != '\0' && isdigit (*s)) |
|
|
836 { |
|
|
837 chars_from_fmt_str++; |
|
|
838 fmt << *s++; |
|
|
839 } |
|
|
840 } |
|
|
841 |
|
|
842 if (*s == '\0') |
|
|
843 goto invalid_format; |
|
|
844 |
|
|
845 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
846 { |
|
|
847 chars_from_fmt_str++; |
|
|
848 fmt << *s++; |
|
|
849 } |
|
|
850 |
|
|
851 if (*s == '\0') |
|
|
852 goto invalid_format; |
|
|
853 |
|
|
854 if (fmt_arg_count >= nargin) |
|
|
855 { |
|
218
|
856 error ("%s: not enough arguments", type); |
|
1
|
857 return -1; |
|
|
858 } |
|
|
859 |
|
|
860 switch (*s) |
|
|
861 { |
|
|
862 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
|
863 |
|
598
|
864 if (! args(fmt_arg_count).is_scalar_type ()) |
|
1
|
865 goto invalid_conversion; |
|
|
866 else |
|
|
867 { |
|
|
868 chars_from_fmt_str++; |
|
|
869 fmt << *s << ends; |
|
497
|
870 double d = args(fmt_arg_count++).double_value (); |
|
1
|
871 if ((int) d != d) |
|
|
872 goto invalid_conversion; |
|
|
873 else |
|
|
874 { |
|
|
875 char *s = fmt.str (); |
|
|
876 sb.form (s, (int) d); |
|
|
877 delete [] s; |
|
|
878 return chars_from_fmt_str; |
|
|
879 } |
|
|
880 } |
|
|
881 |
|
|
882 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
|
883 |
|
598
|
884 if (! args(fmt_arg_count).is_scalar_type ()) |
|
1
|
885 goto invalid_conversion; |
|
|
886 else |
|
|
887 { |
|
|
888 chars_from_fmt_str++; |
|
|
889 fmt << *s << ends; |
|
|
890 char *s = fmt.str (); |
|
497
|
891 sb.form (s, args(fmt_arg_count++).double_value ()); |
|
1
|
892 delete [] s; |
|
|
893 return chars_from_fmt_str; |
|
|
894 } |
|
|
895 |
|
|
896 case 's': |
|
|
897 |
|
610
|
898 if (! args(fmt_arg_count).is_string ()) |
|
1
|
899 goto invalid_conversion; |
|
|
900 else |
|
|
901 { |
|
|
902 chars_from_fmt_str++; |
|
|
903 fmt << *s << ends; |
|
|
904 char *s = fmt.str (); |
|
497
|
905 sb.form (s, args(fmt_arg_count++).string_value ()); |
|
1
|
906 delete [] s; |
|
|
907 return chars_from_fmt_str; |
|
|
908 } |
|
|
909 |
|
|
910 case 'c': |
|
|
911 |
|
610
|
912 if (! args(fmt_arg_count).is_string ()) |
|
1
|
913 goto invalid_conversion; |
|
|
914 else |
|
|
915 { |
|
|
916 chars_from_fmt_str++; |
|
|
917 fmt << *s << ends; |
|
497
|
918 char *str = args(fmt_arg_count++).string_value (); |
|
1
|
919 if (strlen (str) != 1) |
|
|
920 goto invalid_conversion; |
|
|
921 else |
|
|
922 { |
|
|
923 char *s = fmt.str (); |
|
|
924 sb.form (s, *str); |
|
|
925 delete [] s; |
|
|
926 return chars_from_fmt_str; |
|
|
927 } |
|
|
928 } |
|
|
929 |
|
|
930 default: |
|
|
931 goto invalid_format; |
|
|
932 } |
|
|
933 |
|
|
934 invalid_conversion: |
|
218
|
935 error ("%s: invalid conversion", type); |
|
1
|
936 return -1; |
|
|
937 |
|
|
938 invalid_format: |
|
218
|
939 error ("%s: invalid format", type); |
|
1
|
940 return -1; |
|
|
941 } |
|
|
942 |
|
|
943 |
|
529
|
944 /* |
|
|
945 * Formatted printing to a file. |
|
|
946 */ |
|
|
947 DEFUN ("fprintf", Ffprintf, Sfprintf, -1, 1, |
|
|
948 "fprintf (FILENAME or FILENUM, FORMAT, ...)") |
|
|
949 { |
|
|
950 Octave_object retval; |
|
|
951 |
|
|
952 int nargin = args.length (); |
|
|
953 |
|
|
954 if (nargin < 3) |
|
|
955 print_usage ("fprintf"); |
|
|
956 else |
|
|
957 retval = do_printf ("fprintf", args, nargout); |
|
|
958 |
|
|
959 return retval; |
|
|
960 } |
|
|
961 |
|
|
962 /* |
|
|
963 * Formatted printing. |
|
|
964 */ |
|
|
965 DEFUN ("printf", Fprintf, Sprintf, -1, 1, |
|
|
966 "printf (FORMAT, ...)") |
|
|
967 { |
|
|
968 Octave_object retval; |
|
|
969 |
|
|
970 int nargin = args.length (); |
|
|
971 |
|
|
972 if (nargin < 2) |
|
|
973 print_usage ("printf"); |
|
|
974 else |
|
|
975 retval = do_printf ("printf", args, nargout); |
|
|
976 |
|
|
977 return retval; |
|
|
978 } |
|
|
979 |
|
|
980 /* |
|
|
981 * Formatted printing to a string. |
|
|
982 */ |
|
|
983 DEFUN ("sprintf", Fsprintf, Ssprintf, -1, 1, |
|
|
984 "s = sprintf (FORMAT, ...)") |
|
|
985 { |
|
|
986 Octave_object retval; |
|
|
987 |
|
|
988 int nargin = args.length (); |
|
|
989 |
|
|
990 if (nargin < 2) |
|
|
991 print_usage ("sprintf"); |
|
|
992 else |
|
|
993 retval = do_printf ("sprintf", args, nargout); |
|
|
994 |
|
|
995 return retval; |
|
|
996 } |
|
|
997 |
|
497
|
998 Octave_object |
|
506
|
999 do_printf (const char *type, const Octave_object& args, int nargout) |
|
1
|
1000 { |
|
497
|
1001 Octave_object retval; |
|
1
|
1002 fmt_arg_count = 1; |
|
|
1003 char *fmt; |
|
240
|
1004 file_info file; |
|
1
|
1005 |
|
|
1006 if (strcmp (type, "fprintf") == 0) |
|
|
1007 { |
|
610
|
1008 if (args(2).is_string ()) |
|
1
|
1009 { |
|
497
|
1010 fmt = args(2).string_value (); |
|
1
|
1011 fmt_arg_count++; |
|
|
1012 } |
|
|
1013 else |
|
|
1014 { |
|
|
1015 error ("%s: format must be a string", type); |
|
|
1016 return retval; |
|
|
1017 } |
|
|
1018 |
|
497
|
1019 Pix p = file_io_get_file (args(1), "a+", type); |
|
368
|
1020 |
|
529
|
1021 if (! p) |
|
368
|
1022 return retval; |
|
1
|
1023 |
|
|
1024 file = file_list (p); |
|
368
|
1025 |
|
1
|
1026 if (file.mode () == "r") |
|
|
1027 { |
|
|
1028 error ("%s: file is read only", type); |
|
|
1029 return retval; |
|
|
1030 } |
|
368
|
1031 |
|
497
|
1032 fmt = args(2).string_value (); |
|
368
|
1033 |
|
1
|
1034 fmt_arg_count++; |
|
|
1035 } |
|
610
|
1036 else if (args(1).is_string ()) |
|
1
|
1037 { |
|
497
|
1038 fmt = args(1).string_value (); |
|
1
|
1039 fmt_arg_count++; |
|
|
1040 } |
|
|
1041 else |
|
|
1042 { |
|
|
1043 error ("%s: invalid format string", type); |
|
|
1044 return retval; |
|
|
1045 } |
|
|
1046 |
|
|
1047 // Scan fmt for % escapes and print out the arguments. |
|
|
1048 |
|
|
1049 ostrstream output_buf; |
|
|
1050 |
|
|
1051 char *ptr = fmt; |
|
|
1052 |
|
|
1053 for (;;) |
|
|
1054 { |
|
|
1055 char c; |
|
|
1056 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1057 output_buf << c; |
|
|
1058 |
|
|
1059 if (c == '\0') |
|
|
1060 break; |
|
|
1061 |
|
|
1062 if (*ptr == '%') |
|
|
1063 { |
|
|
1064 ptr++; |
|
|
1065 output_buf << c; |
|
|
1066 continue; |
|
|
1067 } |
|
|
1068 |
|
|
1069 // We must be looking at a format specifier. Extract it or fail. |
|
|
1070 |
|
|
1071 |
|
506
|
1072 int status = process_printf_format (ptr, args, output_buf, type); |
|
1
|
1073 |
|
|
1074 if (status < 0) |
|
|
1075 return retval; |
|
|
1076 |
|
|
1077 ptr += status; |
|
|
1078 } |
|
|
1079 |
|
|
1080 output_buf << ends; |
|
|
1081 if (strcmp (type, "printf") == 0 |
|
|
1082 || (strcmp (type, "fprintf") == 0 && file.number () == 1)) |
|
|
1083 { |
|
|
1084 maybe_page_output (output_buf); |
|
|
1085 } |
|
|
1086 else if (strcmp (type, "fprintf") == 0) |
|
|
1087 { |
|
|
1088 char *msg = output_buf.str (); |
|
|
1089 int success = fputs (msg, file.fptr ()); |
|
|
1090 if (success == EOF) |
|
218
|
1091 warning ("%s: unknown failure writing to file", type); |
|
1
|
1092 delete [] msg; |
|
|
1093 } |
|
|
1094 else if (strcmp (type, "sprintf") == 0) |
|
|
1095 { |
|
497
|
1096 retval.resize (1); |
|
1
|
1097 char *msg = output_buf.str (); |
|
497
|
1098 retval(0) = tree_constant (msg); |
|
1
|
1099 delete [] msg; |
|
|
1100 } |
|
|
1101 |
|
|
1102 return retval; |
|
|
1103 } |
|
|
1104 |
|
|
1105 static int |
|
368
|
1106 process_scanf_format (const char *s, ostrstream& fmt, |
|
|
1107 const char *type, int nargout, FILE* fptr, |
|
497
|
1108 Octave_object& values) |
|
1
|
1109 { |
|
|
1110 fmt << "%"; |
|
|
1111 |
|
|
1112 int chars_from_fmt_str = 0; |
|
|
1113 int store_value = 1; |
|
|
1114 int string_width = -1; |
|
|
1115 int success = 1; |
|
|
1116 |
|
|
1117 if (*s == '*') |
|
|
1118 { |
|
|
1119 store_value = 0; |
|
|
1120 s++; |
|
|
1121 chars_from_fmt_str++; |
|
|
1122 } |
|
|
1123 |
|
|
1124 if (isdigit (*s)) |
|
|
1125 { |
|
|
1126 ostrstream str_number; |
|
|
1127 while (*s != '\0' && isdigit (*s)) |
|
|
1128 { |
|
|
1129 chars_from_fmt_str++; |
|
|
1130 str_number << *s; |
|
|
1131 fmt << *s++; |
|
|
1132 } |
|
|
1133 str_number << ends; |
|
|
1134 char *number = str_number.str (); |
|
|
1135 string_width = atoi (number); |
|
|
1136 delete [] number; |
|
|
1137 } |
|
|
1138 |
|
|
1139 if (*s == '\0') |
|
|
1140 goto invalid_format; |
|
|
1141 |
|
|
1142 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
1143 { |
|
|
1144 chars_from_fmt_str++; |
|
|
1145 s++; |
|
|
1146 } |
|
|
1147 |
|
|
1148 if (*s == '\0') |
|
|
1149 goto invalid_format; |
|
|
1150 |
|
368
|
1151 // Even if we don't have a place to store them, attempt to convert |
|
|
1152 // everything specified by the format string. |
|
1
|
1153 |
|
497
|
1154 if (fmt_arg_count >= (nargout ? nargout : 1)) |
|
368
|
1155 store_value = 0; |
|
1
|
1156 |
|
|
1157 switch (*s) |
|
|
1158 { |
|
|
1159 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
|
1160 { |
|
|
1161 chars_from_fmt_str++; |
|
|
1162 fmt << *s << ends; |
|
|
1163 int temp; |
|
|
1164 char *str = fmt.str (); |
|
|
1165 success = fscanf (fptr, str, &temp); |
|
|
1166 delete [] str; |
|
|
1167 if (success > 0 && store_value) |
|
497
|
1168 values(fmt_arg_count++) = tree_constant ((double) temp); |
|
1
|
1169 } |
|
|
1170 break; |
|
|
1171 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
|
1172 { |
|
|
1173 chars_from_fmt_str++; |
|
|
1174 fmt << 'l' << *s << ends; |
|
|
1175 double temp; |
|
|
1176 char *str = fmt.str (); |
|
|
1177 success = fscanf (fptr, str, &temp); |
|
|
1178 delete [] str; |
|
|
1179 if (success > 0 && store_value) |
|
497
|
1180 values(fmt_arg_count++) = tree_constant (temp); |
|
1
|
1181 } |
|
|
1182 break; |
|
|
1183 case 's': |
|
|
1184 { |
|
|
1185 if (string_width < 1) |
|
|
1186 { |
|
|
1187 string_width = 0; |
|
|
1188 long original_position = ftell (fptr); |
|
|
1189 int c; |
|
|
1190 |
|
|
1191 while ((c = getc (fptr)) != EOF |
|
|
1192 && (c == ' ' || c == '\n' || c != '\t')) |
|
|
1193 ; // Don't count leading whitespace. |
|
|
1194 |
|
|
1195 if (c != EOF) |
|
|
1196 string_width++; |
|
|
1197 |
|
|
1198 for (;;) |
|
|
1199 { |
|
|
1200 c = getc (fptr); |
|
|
1201 if (c != EOF && c != ' ' && c != '\n' && c != '\t') |
|
|
1202 string_width++; |
|
|
1203 else |
|
|
1204 break; |
|
|
1205 } |
|
|
1206 |
|
|
1207 fseek (fptr, original_position, SEEK_SET); |
|
|
1208 } |
|
|
1209 chars_from_fmt_str++; |
|
|
1210 char temp[string_width+1]; |
|
|
1211 fmt << *s << ends; |
|
|
1212 char *str = fmt.str (); |
|
|
1213 success = fscanf (fptr, str, temp); |
|
|
1214 delete [] str; |
|
|
1215 if (success && store_value) |
|
497
|
1216 values(fmt_arg_count++) = tree_constant (temp); |
|
1
|
1217 } |
|
|
1218 break; |
|
|
1219 case 'c': |
|
|
1220 { |
|
|
1221 if (string_width < 1) |
|
|
1222 string_width = 1; |
|
|
1223 chars_from_fmt_str++; |
|
|
1224 char temp[string_width+1]; |
|
|
1225 memset (temp, '\0', string_width+1); |
|
|
1226 fmt << *s << ends; |
|
|
1227 char *str = fmt.str (); |
|
|
1228 success = fscanf (fptr, str, temp); |
|
|
1229 delete [] str; |
|
|
1230 temp[string_width] = '\0'; |
|
|
1231 if (success > 0 && store_value) |
|
497
|
1232 values(fmt_arg_count++) = tree_constant (temp); |
|
1
|
1233 } |
|
|
1234 break; |
|
|
1235 default: |
|
|
1236 goto invalid_format; |
|
|
1237 } |
|
|
1238 |
|
368
|
1239 if (success > 0) |
|
1
|
1240 return chars_from_fmt_str; |
|
368
|
1241 else if (success == 0) |
|
218
|
1242 warning ("%s: invalid conversion", type); |
|
1
|
1243 else if (success == EOF) |
|
|
1244 { |
|
|
1245 if (strcmp (type, "fscanf") == 0) |
|
218
|
1246 warning ("%s: end of file reached before final conversion", type); |
|
1
|
1247 else if (strcmp (type, "sscanf") == 0) |
|
218
|
1248 warning ("%s: end of string reached before final conversion", type); |
|
1
|
1249 else if (strcmp (type, "scanf") == 0) |
|
218
|
1250 warning ("%s: end of input reached before final conversion", type); |
|
1
|
1251 } |
|
|
1252 else |
|
|
1253 { |
|
|
1254 invalid_format: |
|
218
|
1255 warning ("%s: invalid format", type); |
|
1
|
1256 } |
|
|
1257 |
|
|
1258 return -1; |
|
|
1259 } |
|
|
1260 |
|
529
|
1261 /* |
|
|
1262 * Formatted reading from a file. |
|
|
1263 */ |
|
|
1264 DEFUN ("fscanf", Ffscanf, Sfscanf, 3, -1, |
|
|
1265 "[A, B, C, ...] = fscanf (FILENAME or FILENUM, FORMAT)") |
|
|
1266 { |
|
|
1267 Octave_object retval; |
|
|
1268 |
|
|
1269 int nargin = args.length (); |
|
|
1270 |
|
|
1271 if (nargin != 2 && nargin != 3) |
|
|
1272 print_usage ("fscanf"); |
|
|
1273 else |
|
|
1274 retval = do_scanf ("fscanf", args, nargout); |
|
|
1275 |
|
|
1276 return retval; |
|
|
1277 } |
|
|
1278 |
|
|
1279 /* |
|
|
1280 * Formatted reading. |
|
|
1281 */ |
|
|
1282 DEFUN ("scanf", Fscanf, Sscanf, 2, -1, |
|
|
1283 "[A, B, C, ...] = scanf (FORMAT)") |
|
|
1284 { |
|
|
1285 Octave_object retval; |
|
|
1286 |
|
|
1287 int nargin = args.length (); |
|
|
1288 |
|
|
1289 if (nargin != 2) |
|
|
1290 print_usage ("scanf"); |
|
|
1291 else |
|
|
1292 retval = do_scanf ("scanf", args, nargout); |
|
|
1293 |
|
|
1294 return retval; |
|
|
1295 } |
|
|
1296 |
|
|
1297 /* |
|
|
1298 * Formatted reading from a string. |
|
|
1299 */ |
|
|
1300 DEFUN ("sscanf", Fsscanf, Ssscanf, 3, -1, |
|
|
1301 "[A, B, C, ...] = sscanf (STRING, FORMAT)") |
|
|
1302 { |
|
|
1303 Octave_object retval; |
|
|
1304 |
|
|
1305 int nargin = args.length (); |
|
|
1306 |
|
|
1307 if (nargin != 3) |
|
|
1308 print_usage ("sscanf"); |
|
|
1309 else |
|
|
1310 retval = do_scanf ("sscanf", args, nargout); |
|
|
1311 |
|
|
1312 return retval; |
|
|
1313 } |
|
|
1314 |
|
497
|
1315 Octave_object |
|
506
|
1316 do_scanf (const char *type, const Octave_object& args, int nargout) |
|
1
|
1317 { |
|
497
|
1318 Octave_object retval; |
|
529
|
1319 char *scanf_fmt = 0; |
|
|
1320 char *tmp_file = 0; |
|
1
|
1321 int tmp_file_open = 0; |
|
529
|
1322 FILE *fptr = 0; |
|
240
|
1323 file_info file; |
|
1
|
1324 |
|
|
1325 fmt_arg_count = 0; |
|
|
1326 |
|
|
1327 if (strcmp (type, "scanf") != 0) |
|
|
1328 { |
|
610
|
1329 if (args(2).is_string ()) |
|
497
|
1330 scanf_fmt = args(2).string_value (); |
|
1
|
1331 else |
|
|
1332 { |
|
|
1333 error ("%s: format must be a string", type); |
|
|
1334 return retval; |
|
|
1335 } |
|
|
1336 } |
|
|
1337 |
|
|
1338 int doing_fscanf = (strcmp (type, "fscanf") == 0); |
|
|
1339 |
|
|
1340 if (doing_fscanf) |
|
|
1341 { |
|
497
|
1342 Pix p = file_io_get_file (args(1), "r", type); |
|
368
|
1343 |
|
529
|
1344 if (! p) |
|
368
|
1345 return retval; |
|
1
|
1346 |
|
|
1347 file = file_list (p); |
|
|
1348 |
|
|
1349 if (strcmp (file.mode (), "w") == 0 || strcmp (file.mode (), "a") == 0) |
|
|
1350 { |
|
|
1351 error ("%s: this file is opened for writing only", type); |
|
|
1352 return retval; |
|
|
1353 } |
|
|
1354 |
|
|
1355 fptr = file.fptr (); |
|
|
1356 } |
|
|
1357 |
|
610
|
1358 if ((! fptr && args(1).is_string ()) |
|
368
|
1359 || (doing_fscanf && file.number () == 0)) |
|
1
|
1360 { |
|
|
1361 char *string; |
|
|
1362 |
|
|
1363 if (strcmp (type, "scanf") == 0) |
|
497
|
1364 scanf_fmt = args(1).string_value (); |
|
1
|
1365 |
|
|
1366 if (strcmp (type, "scanf") == 0 |
|
|
1367 || (doing_fscanf && file.number () == 0)) |
|
|
1368 { |
|
|
1369 string = gnu_readline (""); |
|
|
1370 if (string && *string) |
|
|
1371 maybe_save_history (string); |
|
|
1372 } |
|
|
1373 else |
|
497
|
1374 string = args(1).string_value (); |
|
1
|
1375 |
|
529
|
1376 tmp_file = tmpnam (0); |
|
1
|
1377 |
|
|
1378 fptr = fopen (tmp_file, "w+"); |
|
529
|
1379 if (! fptr) |
|
1
|
1380 { |
|
|
1381 error ("%s: error opening temporary file", type); |
|
|
1382 return retval; |
|
|
1383 } |
|
|
1384 tmp_file_open = 1; |
|
|
1385 unlink (tmp_file); |
|
|
1386 |
|
529
|
1387 if (! string) |
|
1
|
1388 panic_impossible (); |
|
|
1389 |
|
|
1390 int success = fputs (string, fptr); |
|
|
1391 fflush (fptr); |
|
|
1392 rewind (fptr); |
|
|
1393 |
|
|
1394 if (success < 0) |
|
|
1395 { |
|
|
1396 error ("%s: trouble writing temporary file", type); |
|
|
1397 fclose (fptr); |
|
|
1398 return retval; |
|
|
1399 } |
|
|
1400 } |
|
|
1401 else if (! doing_fscanf) |
|
|
1402 { |
|
|
1403 error ("%s: first argument must be a string", type); |
|
|
1404 return retval; |
|
|
1405 } |
|
|
1406 |
|
|
1407 // Scan scanf_fmt for % escapes and assign the arguments. |
|
|
1408 |
|
497
|
1409 retval.resize (nargout ? nargout : 1); |
|
1
|
1410 |
|
|
1411 char *ptr = scanf_fmt; |
|
|
1412 |
|
|
1413 for (;;) |
|
|
1414 { |
|
|
1415 ostrstream fmt; |
|
|
1416 char c; |
|
|
1417 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1418 fmt << c; |
|
|
1419 |
|
|
1420 if (c == '\0') |
|
|
1421 break; |
|
|
1422 |
|
|
1423 if (*ptr == '%') |
|
|
1424 { |
|
|
1425 ptr++; |
|
|
1426 fmt << c; |
|
|
1427 continue; |
|
|
1428 } |
|
|
1429 |
|
|
1430 // We must be looking at a format specifier. Extract it or fail. |
|
|
1431 |
|
368
|
1432 int status = process_scanf_format (ptr, fmt, type, nargout, |
|
|
1433 fptr, retval); |
|
1
|
1434 |
|
|
1435 if (status < 0) |
|
|
1436 { |
|
|
1437 if (fmt_arg_count == 0) |
|
497
|
1438 retval.resize (0); |
|
1
|
1439 break; |
|
|
1440 } |
|
|
1441 |
|
|
1442 ptr += status; |
|
|
1443 } |
|
|
1444 |
|
|
1445 if (tmp_file_open) |
|
|
1446 fclose (fptr); |
|
|
1447 |
|
|
1448 return retval; |
|
|
1449 } |
|
|
1450 |
|
|
1451 /* |
|
471
|
1452 * Find out how many elements are left to read. |
|
444
|
1453 */ |
|
|
1454 static long |
|
471
|
1455 num_items_remaining (FILE *fptr, char *type) |
|
444
|
1456 { |
|
471
|
1457 size_t size; |
|
|
1458 |
|
|
1459 if (strcasecmp (type, "uchar") == 0) |
|
|
1460 size = sizeof (u_char); |
|
|
1461 else if (strcasecmp (type, "char") == 0) |
|
|
1462 size = sizeof (char); |
|
|
1463 else if (strcasecmp (type, "short") == 0) |
|
|
1464 size = sizeof (short); |
|
|
1465 else if (strcasecmp (type, "ushort") == 0) |
|
|
1466 size = sizeof (u_short); |
|
|
1467 else if (strcasecmp (type, "int") == 0) |
|
|
1468 size = sizeof (int); |
|
|
1469 else if (strcasecmp (type, "uint") == 0) |
|
|
1470 size = sizeof (u_int); |
|
|
1471 else if (strcasecmp (type, "long") == 0) |
|
|
1472 size = sizeof (long); |
|
|
1473 else if (strcasecmp (type, "ulong") == 0) |
|
|
1474 size = sizeof (u_long); |
|
|
1475 else if (strcasecmp (type, "float") == 0) |
|
|
1476 size = sizeof (float); |
|
|
1477 else if (strcasecmp (type, "double") == 0) |
|
|
1478 size = sizeof (double); |
|
|
1479 else |
|
|
1480 return 0; |
|
|
1481 |
|
444
|
1482 long curr_pos = ftell (fptr); |
|
|
1483 |
|
|
1484 fseek (fptr, 0, SEEK_END); |
|
|
1485 long end_of_file = ftell (fptr); |
|
|
1486 |
|
471
|
1487 fseek (fptr, curr_pos, SEEK_SET); |
|
444
|
1488 |
|
|
1489 long len = end_of_file - curr_pos; |
|
|
1490 |
|
471
|
1491 return len / size; |
|
444
|
1492 } |
|
|
1493 |
|
529
|
1494 DEFUN ("fread", Ffread, Sfread, 4, 2, |
|
|
1495 "[DATA, COUNT] = fread (FILENUM, SIZE, PRECISION)\n\ |
|
|
1496 \n\ |
|
|
1497 Reads data in binary form of type PRECISION from a file.\n\ |
|
|
1498 \n\ |
|
|
1499 FILENUM : file number from fopen\n\ |
|
|
1500 SIZE : size specification for the Data matrix\n\ |
|
|
1501 PRECISION : type of data to read, valid types are\n\ |
|
|
1502 \n\ |
|
|
1503 'char', 'schar', 'short', 'int', 'long', 'float'\n\ |
|
|
1504 'double', 'uchar', 'ushort', 'uint', 'ulong'\n\ |
|
|
1505 \n\ |
|
|
1506 DATA : matrix in which the data is stored\n\ |
|
|
1507 COUNT : number of elements read") |
|
|
1508 { |
|
|
1509 Octave_object retval; |
|
|
1510 |
|
|
1511 int nargin = args.length (); |
|
|
1512 |
|
|
1513 if (nargin < 2 || nargin > 4) |
|
|
1514 print_usage ("fread"); |
|
|
1515 else |
|
|
1516 retval = fread_internal (args, nargout); |
|
|
1517 |
|
|
1518 return retval; |
|
|
1519 } |
|
|
1520 |
|
444
|
1521 /* |
|
|
1522 * Read binary data from a file. |
|
|
1523 * |
|
|
1524 * [data, count] = fread (fid, size, 'precision') |
|
|
1525 * |
|
|
1526 * fid : the file id from fopen |
|
|
1527 * size : the size of the matrix or vector or scaler to read |
|
|
1528 * |
|
|
1529 * n : reads n elements of a column vector |
|
|
1530 * inf : reads to the end of file (default) |
|
|
1531 * [m, n] : reads enough elements to fill the matrix |
|
|
1532 * the number of columns can be inf |
|
|
1533 * |
|
|
1534 * precision : type of the element. Can be: |
|
|
1535 * |
|
|
1536 * char, uchar, schar, short, ushort, int, uint, |
|
|
1537 * long, ulong, float, double |
|
|
1538 * |
|
|
1539 * Default is uchar. |
|
|
1540 * |
|
|
1541 * data : output data |
|
|
1542 * count : number of elements read |
|
|
1543 */ |
|
497
|
1544 Octave_object |
|
506
|
1545 fread_internal (const Octave_object& args, int nargout) |
|
444
|
1546 { |
|
497
|
1547 Octave_object retval; |
|
444
|
1548 |
|
506
|
1549 int nargin = args.length (); |
|
|
1550 |
|
497
|
1551 Pix p = file_io_get_file (args(1), "r", "fread"); |
|
444
|
1552 |
|
529
|
1553 if (! p) |
|
444
|
1554 return retval; |
|
|
1555 |
|
|
1556 // Get type and number of bytes per element to read. |
|
|
1557 char *prec = "uchar"; |
|
|
1558 if (nargin > 3) |
|
|
1559 { |
|
610
|
1560 if (args(3).is_string ()) |
|
497
|
1561 prec = args(3).string_value (); |
|
444
|
1562 else |
|
|
1563 { |
|
|
1564 error ("fread: precision must be a specified as a string"); |
|
|
1565 return retval; |
|
|
1566 } |
|
|
1567 } |
|
|
1568 |
|
471
|
1569 // Get file info. |
|
444
|
1570 |
|
|
1571 file_info file = file_list (p); |
|
471
|
1572 |
|
|
1573 FILE *fptr = file.fptr (); |
|
444
|
1574 |
|
|
1575 // Set up matrix to read into. If specified in arguments use that |
|
|
1576 // number, otherwise read everyting left in file. |
|
|
1577 |
|
471
|
1578 double dnr = 0.0; |
|
|
1579 double dnc = 0.0; |
|
|
1580 int nr; |
|
|
1581 int nc; |
|
444
|
1582 |
|
|
1583 if (nargin > 2) |
|
|
1584 { |
|
497
|
1585 if (args(2).is_scalar_type ()) |
|
444
|
1586 { |
|
497
|
1587 tree_constant tmpa = args(2).make_numeric (); |
|
471
|
1588 dnr = tmpa.double_value (); |
|
|
1589 dnc = 1.0; |
|
444
|
1590 } |
|
497
|
1591 else if (args(2).is_matrix_type ()) |
|
444
|
1592 { |
|
497
|
1593 ColumnVector tmp = args(2).to_vector (); |
|
444
|
1594 |
|
471
|
1595 if (tmp.length () == 2) |
|
|
1596 { |
|
|
1597 dnr = tmp.elem (0); |
|
|
1598 dnc = tmp.elem (1); |
|
|
1599 } |
|
|
1600 else |
|
|
1601 { |
|
|
1602 error ("fread: invalid size specification\n"); |
|
|
1603 return retval; |
|
|
1604 } |
|
|
1605 } |
|
|
1606 |
|
|
1607 if ((xisinf (dnr)) && (xisinf (dnc))) |
|
444
|
1608 { |
|
471
|
1609 error ("fread: number of rows and columns cannot both be infinite"); |
|
444
|
1610 return retval; |
|
|
1611 } |
|
|
1612 |
|
471
|
1613 if (xisinf (dnr)) |
|
|
1614 { |
|
|
1615 nc = NINT (dnc); |
|
|
1616 int n = num_items_remaining (fptr, prec); |
|
|
1617 nr = n / nc; |
|
|
1618 if (n > nr * nc) |
|
|
1619 nr++; |
|
|
1620 } |
|
|
1621 else if (xisinf (dnc)) |
|
|
1622 { |
|
|
1623 nr = NINT (dnr); |
|
|
1624 int n = num_items_remaining (fptr, prec); |
|
|
1625 nc = n / nr; |
|
|
1626 if (n > nc * nr) |
|
|
1627 nc++; |
|
|
1628 } |
|
|
1629 else |
|
|
1630 { |
|
|
1631 nr = NINT (dnr); |
|
|
1632 nc = NINT (dnc); |
|
|
1633 } |
|
444
|
1634 } |
|
|
1635 else |
|
|
1636 { |
|
|
1637 // No size parameter, read what's left of the file. |
|
471
|
1638 nc = 1; |
|
|
1639 int n = num_items_remaining (fptr, prec); |
|
|
1640 nr = n / nc; |
|
|
1641 if (n > nr * nc) |
|
|
1642 nr++; |
|
444
|
1643 } |
|
|
1644 |
|
|
1645 Matrix m (nr, nc, octave_NaN); |
|
|
1646 |
|
|
1647 // Read data. |
|
|
1648 |
|
471
|
1649 int count = m.read (fptr, prec); |
|
444
|
1650 |
|
|
1651 if (nargout > 1) |
|
|
1652 { |
|
497
|
1653 retval.resize (2); |
|
|
1654 retval(1) = tree_constant ((double) count); |
|
444
|
1655 } |
|
|
1656 else |
|
497
|
1657 retval.resize (1); |
|
444
|
1658 |
|
497
|
1659 retval(0) = tree_constant (m); |
|
444
|
1660 |
|
|
1661 return retval; |
|
|
1662 } |
|
|
1663 |
|
529
|
1664 DEFUN ("fwrite", Ffwrite, Sfwrite, 4, 1, |
|
|
1665 "COUNT = fwrite (FILENUM, DATA, PRECISION)\n\ |
|
|
1666 \n\ |
|
|
1667 Writes data to a file in binary form of size PRECISION\n\ |
|
|
1668 \n\ |
|
|
1669 FILENUM : file number from fopen\n\ |
|
|
1670 DATA : matrix of elements to be written\n\ |
|
|
1671 PRECISION : type of data to read, valid types are\n\ |
|
|
1672 \n\ |
|
|
1673 'char', 'schar', 'short', 'int', 'long', 'float'\n\ |
|
|
1674 'double', 'uchar', 'ushort', 'uint', 'ulong'\n\ |
|
|
1675 \n\ |
|
|
1676 COUNT : number of elements written") |
|
|
1677 { |
|
|
1678 Octave_object retval; |
|
|
1679 |
|
|
1680 int nargin = args.length (); |
|
|
1681 |
|
|
1682 if (nargin < 3 || nargin > 4) |
|
|
1683 print_usage ("fwrite"); |
|
|
1684 else |
|
|
1685 retval = fwrite_internal (args, nargout); |
|
|
1686 |
|
|
1687 return retval; |
|
|
1688 } |
|
|
1689 |
|
444
|
1690 /* |
|
|
1691 * Write binary data to a file. |
|
|
1692 * |
|
|
1693 * count = fwrite (fid, data, 'precision') |
|
|
1694 * |
|
|
1695 * fid : file id from fopen |
|
|
1696 * Data : data to be written |
|
|
1697 * precision : type of output element. Can be: |
|
|
1698 * |
|
|
1699 * char, uchar, schar, short, ushort, int, uint, |
|
|
1700 * long, float, double |
|
|
1701 * |
|
|
1702 * Default is uchar. |
|
|
1703 * |
|
|
1704 * count : the number of elements written |
|
|
1705 */ |
|
497
|
1706 Octave_object |
|
506
|
1707 fwrite_internal (const Octave_object& args, int nargout) |
|
444
|
1708 { |
|
497
|
1709 Octave_object retval; |
|
444
|
1710 |
|
506
|
1711 int nargin = args.length (); |
|
|
1712 |
|
497
|
1713 Pix p = file_io_get_file (args(1), "a+", "fwrite"); |
|
444
|
1714 |
|
529
|
1715 if (! p) |
|
444
|
1716 return retval; |
|
|
1717 |
|
|
1718 // Get type and number of bytes per element to read. |
|
|
1719 char *prec = "uchar"; |
|
|
1720 if (nargin > 3) |
|
|
1721 { |
|
610
|
1722 if (args(3).is_string ()) |
|
497
|
1723 prec = args(3).string_value (); |
|
444
|
1724 else |
|
|
1725 { |
|
|
1726 error ("fwrite: precision must be a specified as a string"); |
|
|
1727 return retval; |
|
|
1728 } |
|
|
1729 } |
|
|
1730 |
|
|
1731 file_info file = file_list (p); |
|
|
1732 |
|
497
|
1733 Matrix m = args(2).to_matrix (); |
|
444
|
1734 |
|
471
|
1735 int count = m.write (file.fptr (), prec); |
|
444
|
1736 |
|
497
|
1737 retval.resize (1); |
|
|
1738 retval(0) = tree_constant ((double) count); |
|
444
|
1739 |
|
|
1740 return retval; |
|
|
1741 } |
|
|
1742 |
|
529
|
1743 DEFUN ("feof", Ffeof, Sfeof, 2, 1, |
|
|
1744 "ERROR = feof (FILENAME or FILENUM)\n\ |
|
|
1745 \n\ |
|
|
1746 Returns a non zero value for an end of file condition for the\n\ |
|
|
1747 file specified by FILENAME or FILENUM from fopen") |
|
|
1748 { |
|
|
1749 Octave_object retval; |
|
|
1750 |
|
|
1751 int nargin = args.length (); |
|
|
1752 |
|
|
1753 if (nargin != 2) |
|
|
1754 print_usage ("feof"); |
|
|
1755 else |
|
|
1756 retval = feof_internal (args, nargout); |
|
|
1757 |
|
|
1758 return retval; |
|
|
1759 } |
|
|
1760 |
|
444
|
1761 /* |
|
|
1762 * Check for an EOF condition on a file opened by fopen. |
|
|
1763 * |
|
|
1764 * eof = feof (fid) |
|
|
1765 * |
|
|
1766 * fid : file id from fopen |
|
|
1767 * eof : non zero for an end of file condition |
|
|
1768 */ |
|
497
|
1769 Octave_object |
|
506
|
1770 feof_internal (const Octave_object& args, int nargout) |
|
444
|
1771 { |
|
497
|
1772 Octave_object retval; |
|
444
|
1773 |
|
|
1774 // Get file info. |
|
497
|
1775 Pix p = return_valid_file (args(1)); |
|
444
|
1776 |
|
529
|
1777 if (! p) |
|
444
|
1778 return retval; |
|
|
1779 |
|
|
1780 file_info file = file_list (p); |
|
|
1781 |
|
497
|
1782 retval.resize (1); |
|
529
|
1783 retval(0) = (double) feof (file.fptr ()); |
|
|
1784 |
|
|
1785 return retval; |
|
|
1786 } |
|
|
1787 |
|
|
1788 DEFUN ("ferror", Fferror, Sferror, 2, 1, |
|
|
1789 "ERROR = ferror (FILENAME or FILENUM)\n\ |
|
|
1790 \n\ |
|
|
1791 Returns a non zero value for an error condition on the\n\ |
|
|
1792 file specified by FILENAME or FILENUM from fopen") |
|
|
1793 { |
|
|
1794 Octave_object retval; |
|
|
1795 |
|
|
1796 int nargin = args.length (); |
|
|
1797 |
|
|
1798 if (nargin != 2) |
|
|
1799 print_usage ("ferror"); |
|
|
1800 else |
|
|
1801 retval = ferror_internal (args, nargout); |
|
444
|
1802 |
|
|
1803 return retval; |
|
|
1804 } |
|
|
1805 |
|
|
1806 /* |
|
|
1807 * Check for an error condition on a file opened by fopen. |
|
|
1808 * |
|
|
1809 * [message, errnum] = ferror (fid) |
|
|
1810 * |
|
|
1811 * fid : file id from fopen |
|
|
1812 * message : system error message |
|
|
1813 * errnum : error number |
|
|
1814 */ |
|
497
|
1815 Octave_object |
|
506
|
1816 ferror_internal (const Octave_object& args, int nargout) |
|
444
|
1817 { |
|
497
|
1818 Octave_object retval; |
|
444
|
1819 |
|
|
1820 // Get file info. |
|
497
|
1821 Pix p = return_valid_file (args(1)); |
|
444
|
1822 |
|
529
|
1823 if (! p) |
|
444
|
1824 return retval; |
|
|
1825 |
|
|
1826 file_info file = file_list (p); |
|
|
1827 |
|
|
1828 int ierr = ferror (file.fptr ()); |
|
|
1829 |
|
|
1830 if (nargout > 1) |
|
|
1831 { |
|
497
|
1832 retval.resize (2); |
|
|
1833 retval(1) = tree_constant ((double) ierr); |
|
444
|
1834 } |
|
|
1835 else |
|
497
|
1836 retval.resize (1); |
|
444
|
1837 |
|
497
|
1838 retval(0) = tree_constant (strsave (strerror (ierr))); |
|
444
|
1839 |
|
|
1840 return retval; |
|
|
1841 } |
|
|
1842 |
|
|
1843 /* |
|
1
|
1844 ;;; Local Variables: *** |
|
|
1845 ;;; mode: C++ *** |
|
|
1846 ;;; page-delimiter: "^/\\*" *** |
|
|
1847 ;;; End: *** |
|
|
1848 */ |
