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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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4 Copyright (C) 1993 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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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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34 #include <stdlib.h> |
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35 #include <strstream.h> |
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36 #include <ctype.h> |
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37 |
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38 #include "statdefs.h" |
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39 #include "file-io.h" |
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40 #include "input.h" |
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41 #include "octave-hist.h" |
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42 #include "tree-const.h" |
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43 #include "error.h" |
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44 #include "utils.h" |
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45 #include "pager.h" |
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46 |
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47 // keeps a count of how many files are open and in the file list |
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48 static int file_count = 0; |
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49 |
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50 // keeps a count of args sent to printf or scanf |
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51 static int fmt_arg_count = 0; |
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52 |
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240
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53 class file_info |
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1
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54 { |
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55 public: |
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240
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56 file_info (void); |
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57 file_info (int num, const char *nm, FILE *t, const char *md); |
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58 file_info (const file_info& f); |
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59 |
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240
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60 file_info& operator = (const file_info& f); |
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61 |
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240
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62 ~file_info (void); |
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63 |
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64 int number (void) const; |
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240
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65 const char *name (void) const; |
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66 FILE *fptr (void) const; |
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240
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67 const char *mode (void) const; |
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68 |
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69 private: |
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70 int _number; |
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71 char *_name; |
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72 FILE *_fptr; |
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73 char *_mode; |
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74 }; |
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75 |
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240
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76 file_info::file_info (void) |
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77 { |
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78 _number = -1; |
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79 _name = (char *) NULL; |
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80 _fptr = (FILE *) NULL; |
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81 _mode = (char *) NULL; |
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82 } |
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83 |
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240
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84 file_info::file_info (int n, const char *nm, FILE *t, const char *md) |
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85 { |
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86 _number = n; |
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87 _name = strsave (nm); |
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88 _fptr = t; |
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89 _mode = strsave (md); |
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90 } |
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91 |
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92 file_info::file_info (const file_info& f) |
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93 { |
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94 _number = f._number; |
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95 _name = strsave (f._name); |
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96 _fptr = f._fptr; |
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97 _mode = strsave (f._mode); |
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98 } |
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99 |
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240
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100 file_info& |
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101 file_info::operator = (const file_info& f) |
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102 { |
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240
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103 if (this != & f) |
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104 { |
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105 _number = f._number; |
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106 delete [] _name; |
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107 _name = strsave (f._name); |
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108 _fptr = f._fptr; |
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109 delete [] _mode; |
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110 _mode = strsave (f._mode); |
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111 } |
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112 return *this; |
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113 } |
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114 |
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240
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115 file_info::~file_info (void) |
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116 { |
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117 delete [] _name; |
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118 delete [] _mode; |
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119 } |
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120 |
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121 int |
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240
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122 file_info::number (void) const |
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123 { |
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124 return _number; |
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125 } |
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126 |
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240
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127 const char * |
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128 file_info::name (void) const |
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129 { |
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130 return _name; |
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131 } |
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132 |
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133 FILE * |
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240
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134 file_info::fptr (void) const |
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135 { |
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136 return _fptr; |
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137 } |
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138 |
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240
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139 const char * |
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140 file_info::mode (void) const |
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141 { |
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142 return _mode; |
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143 } |
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144 |
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145 |
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146 // double linked list containing relevant information about open files |
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240
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147 static DLList <file_info> file_list; |
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148 |
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149 void |
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164
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150 initialize_file_io (void) |
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151 { |
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240
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152 file_info _stdin (0, "stdin", stdin, "r"); |
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153 file_info _stdout (1, "stdout", stdout, "w"); |
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154 file_info _stderr (2, "stderr", stderr, "w"); |
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155 |
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156 file_list.append (_stdin); |
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157 file_list.append (_stdout); |
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158 file_list.append (_stderr); |
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159 |
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160 file_count = 3; |
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161 } |
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162 |
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163 Pix |
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164
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164 return_valid_file (const tree_constant& arg) |
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165 { |
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166 if (arg.is_string_type ()) |
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167 { |
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168 Pix p = file_list.first (); |
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240
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169 file_info file; |
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170 for (int i = 0; i < file_count; i++) |
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171 { |
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172 char *file_name = arg.string_value (); |
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173 file = file_list (p); |
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174 if (strcmp (file.name (), file_name) == 0) |
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175 return p; |
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176 file_list.next (p); |
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177 } |
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178 } |
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179 else if (arg.is_scalar_type ()) |
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180 { |
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181 double file_num = arg.double_value (); |
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182 if ((double) NINT (file_num) != file_num) |
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183 error ("file number not an integer value"); |
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184 else |
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185 { |
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186 Pix p = file_list.first (); |
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240
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187 file_info file; |
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188 for (int i = 0; i < file_count; i++) |
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189 { |
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190 file = file_list (p); |
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191 if (file.number () == file_num) |
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192 return p; |
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193 file_list.next (p); |
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194 } |
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195 error ("no file with that number"); |
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196 } |
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197 } |
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198 else |
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199 error ("inapproriate file specifier"); |
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200 |
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201 return (Pix) NULL; |
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202 } |
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203 |
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204 static Pix |
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164
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205 fopen_file_for_user (const tree_constant& arg, const char *mode) |
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206 { |
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207 char *file_name = arg.string_value (); |
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208 |
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209 FILE *file_ptr = fopen (file_name, mode); |
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210 if (file_ptr != (FILE *) NULL) |
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211 { |
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240
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212 file_info file (++file_count, file_name, file_ptr, mode); |
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213 file_list.append (file); |
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214 |
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215 Pix p = file_list.first (); |
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240
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216 file_info file_from_list; |
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217 |
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218 for (int i = 0; i < file_count; i++) |
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219 { |
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220 file_from_list = file_list (p); |
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221 if (strcmp (file_from_list.name (), file_name) == 0) |
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222 return p; |
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223 file_list.next (p); |
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224 } |
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225 } |
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226 |
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227 error ("problems automatically opening file for user"); |
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240
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228 |
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229 return (Pix) NULL; |
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230 } |
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231 |
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232 |
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233 tree_constant * |
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164
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234 fclose_internal (const tree_constant *args) |
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235 { |
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236 tree_constant *retval = NULL_TREE_CONST; |
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237 |
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238 Pix p = return_valid_file (args[1]); |
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239 |
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240 if (p == (Pix) NULL) |
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241 return retval; |
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242 |
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240
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243 file_info file = file_list (p); |
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244 |
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245 if (file.number () < 3) |
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246 { |
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247 warning ("fclose: can't close stdin, stdout, or stderr!"); |
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248 return retval; |
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249 } |
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250 |
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251 int success = fclose (file.fptr ()); |
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252 file_list.del (p); |
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253 file_count--; |
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254 |
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255 retval = new tree_constant[2]; |
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256 if (success == 0) |
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257 retval[0] = tree_constant (1.0); // succeeded |
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258 else |
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259 { |
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260 error ("fclose: error on closing file"); |
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261 retval[0] = tree_constant (0.0); // failed |
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262 } |
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263 |
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264 return retval; |
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265 } |
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266 |
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267 tree_constant * |
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164
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268 fflush_internal (const tree_constant *args) |
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269 { |
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270 tree_constant *retval = NULL_TREE_CONST; |
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271 |
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272 Pix p = return_valid_file (args[1]); |
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273 |
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274 if (p == (Pix) NULL) |
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275 return retval; |
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276 |
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240
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277 file_info file = file_list (p); |
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278 |
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279 if (strcmp (file.mode (), "r") == 0) |
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280 { |
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281 warning ("can't flush an input stream"); |
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282 return retval; |
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283 } |
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284 |
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285 int success = 0; |
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240
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286 |
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287 if (file.number () == 1) |
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288 flush_output_to_pager (); |
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289 else |
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290 success = fflush (file.fptr ()); |
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291 |
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292 retval = new tree_constant[2]; |
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293 if (success == 0) |
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294 retval[0] = tree_constant (1.0); // succeeded |
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295 else |
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296 { |
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297 error ("fflush: write error"); |
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298 retval[0] = tree_constant (0.0); // failed |
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299 } |
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300 |
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301 return retval; |
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302 } |
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303 |
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304 static int |
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164
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305 valid_mode (const char *mode) |
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306 { |
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307 if (mode != (char *) NULL) |
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308 { |
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309 char m = mode[0]; |
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310 if (m == 'r' || m == 'w' || m == 'a') |
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311 { |
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312 m = mode[1]; |
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313 return (m == '\0' || (m == '+' && mode[2] == '\0')); |
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314 } |
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315 } |
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316 return 0; |
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317 } |
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318 |
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319 tree_constant * |
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164
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320 fgets_internal (const tree_constant *args, int nargout) |
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321 { |
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322 tree_constant *retval = NULL_TREE_CONST; |
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323 |
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324 Pix p = return_valid_file (args[1]); |
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325 |
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326 if (p == (Pix) NULL) |
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327 { |
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328 if (args[1].is_string_type ()) |
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329 { |
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330 struct stat buffer; |
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331 char *name = args[1].string_value (); |
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332 if (stat (name, &buffer) == 0 |
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333 && (buffer.st_mode & S_IFREG) == S_IFREG) |
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334 { |
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335 p = fopen_file_for_user (args[1], "r"); |
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336 } |
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337 else |
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338 { |
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339 error ("fgets: file dosen't exist"); |
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340 return retval; |
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341 } |
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342 } |
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343 else |
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344 return retval; |
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345 } |
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346 |
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347 int length = 0; |
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348 |
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349 if (args[2].is_scalar_type ()) |
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350 { |
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351 length = (int) args[2].double_value (); |
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352 if ((double) NINT (length) != length) |
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353 { |
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354 error ("fgets: length not an integer value"); |
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355 return retval; |
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356 } |
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357 } |
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358 |
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359 char string[length+1]; |
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240
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360 file_info file = file_list (p); |
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361 char *success = fgets (string, length+1, file.fptr ()); |
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362 |
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363 if (success == (char *) NULL) |
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364 { |
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365 retval = new tree_constant[2]; |
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366 retval[0] = tree_constant (-1.0); |
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367 return retval; |
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368 } |
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369 |
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370 if (nargout == 2) |
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371 { |
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372 retval = new tree_constant[3]; |
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373 retval[1] = tree_constant ((double) strlen (string)); |
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374 } |
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375 else |
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376 retval = new tree_constant[2]; |
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377 |
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378 retval[0] = tree_constant (string); |
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379 |
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380 return retval; |
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381 } |
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382 |
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383 tree_constant * |
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164
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384 fopen_internal (const tree_constant *args) |
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1
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385 { |
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386 tree_constant *retval = NULL_TREE_CONST; |
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387 Pix p; |
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388 |
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389 if (! args[1].is_string_type ()) |
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390 { |
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391 error ("fopen: file name must be a string"); |
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392 return retval; |
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393 } |
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394 |
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395 p = return_valid_file (args[1]); |
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396 |
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397 if (p != (Pix) NULL) |
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398 { |
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240
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399 file_info file = file_list (p); |
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1
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400 |
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401 retval = new tree_constant[2]; |
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402 retval[0] = tree_constant ((double) file.number ()); |
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403 |
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404 return retval; |
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405 } |
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406 |
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407 if (! args[2].is_string_type ()) |
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408 { |
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409 error ("fopen: mode must be a string"); |
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410 return retval; |
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411 } |
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412 |
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413 char *name = args[1].string_value (); |
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414 char *mode = args[2].string_value (); |
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415 |
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416 if (! valid_mode (mode)) |
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417 { |
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418 error ("fopen: invalid mode"); |
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419 return retval; |
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420 } |
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421 |
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422 struct stat buffer; |
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423 if (stat (name, &buffer) == 0 && (buffer.st_mode & S_IFDIR) == S_IFDIR) |
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424 { |
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425 error ("fopen: can't open directory"); |
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426 return retval; |
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427 } |
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428 |
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429 FILE *file_ptr = fopen (name, mode); |
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430 |
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431 if (file_ptr == (FILE *) NULL) |
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432 { |
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433 error ("fopen: file does not exist"); |
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434 return retval; |
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435 } |
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436 |
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437 int number = file_count++; |
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438 |
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240
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439 file_info file (number, name, file_ptr, mode); |
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1
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440 file_list.append (file); |
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441 |
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442 retval = new tree_constant[2]; |
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443 retval[0] = tree_constant ((double) number); |
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444 |
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445 return retval; |
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446 } |
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447 |
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448 tree_constant * |
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164
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449 freport_internal (void) |
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1
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450 { |
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451 tree_constant *retval = NULL_TREE_CONST; |
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452 Pix p = file_list.first (); |
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453 |
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454 ostrstream output_buf; |
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455 |
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456 output_buf << "\n number mode name\n\n"; |
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457 for (int i = 0; i < file_count; i++) |
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458 { |
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240
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459 file_info file = file_list (p); |
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1
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460 output_buf.form ("%7d%6s %s\n", file.number (), file.mode (), |
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461 file.name ()); |
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462 file_list.next (p); |
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463 } |
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464 |
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465 output_buf << "\n" << ends; |
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466 maybe_page_output (output_buf); |
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467 |
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468 return retval; |
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469 } |
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470 |
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471 tree_constant * |
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164
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472 frewind_internal (const tree_constant *args) |
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1
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473 { |
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474 tree_constant *retval = NULL_TREE_CONST; |
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475 |
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476 Pix p = return_valid_file (args[1]); |
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477 if (p == (Pix) NULL) |
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478 p = fopen_file_for_user (args[1], "a+"); |
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479 |
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240
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480 file_info file = file_list (p); |
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1
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481 rewind (file.fptr ()); |
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482 |
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483 return retval; |
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484 } |
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485 |
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486 tree_constant * |
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164
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487 fseek_internal (const tree_constant *args, int nargin) |
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1
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488 { |
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489 tree_constant *retval = NULL_TREE_CONST; |
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490 |
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491 Pix p = return_valid_file (args[1]); |
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492 |
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493 if (p == (Pix) NULL) |
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494 p = fopen_file_for_user (args[1], "a+"); |
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495 |
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496 long origin = SEEK_SET; |
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497 long offset = 0; |
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498 if (args[2].is_scalar_type ()) |
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499 { |
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500 offset = (long) args[2].double_value (); |
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501 if ((double) NINT (offset) != offset) |
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|
502 { |
|
|
503 error ("fseek: offset not an integer value"); |
|
|
504 return retval; |
|
|
505 } |
|
|
506 } |
|
|
507 |
|
|
508 if (nargin == 4 && args[3].is_scalar_type ()) |
|
|
509 { |
|
|
510 origin = (long) args[3].double_value (); |
|
|
511 if (origin == -1) |
|
|
512 origin = SEEK_CUR; |
|
|
513 else if (origin == -2) |
|
|
514 origin = SEEK_END; |
|
|
515 else |
|
|
516 { |
|
|
517 if ((double) NINT (origin) != origin) |
|
|
518 { |
|
|
519 error ("fseek: origin not an integer value"); |
|
|
520 return retval; |
|
|
521 } |
|
|
522 } |
|
|
523 } |
|
|
524 |
|
240
|
525 file_info file = file_list (p); |
|
1
|
526 int success = fseek (file.fptr (), offset, origin); |
|
|
527 retval = new tree_constant[2]; |
|
|
528 |
|
|
529 if (success == 0) |
|
|
530 retval[0] = tree_constant (1.0); // succeeded |
|
|
531 else |
|
|
532 { |
|
|
533 error ("fseek: file error"); |
|
|
534 retval[0] = tree_constant (0.0); // failed |
|
|
535 } |
|
|
536 |
|
|
537 return retval; |
|
|
538 } |
|
|
539 |
|
|
540 tree_constant * |
|
164
|
541 ftell_internal (const tree_constant *args) |
|
1
|
542 { |
|
|
543 tree_constant *retval = NULL_TREE_CONST; |
|
|
544 Pix p = return_valid_file (args[1]); |
|
|
545 |
|
|
546 if (p == (Pix) NULL) |
|
|
547 p = fopen_file_for_user (args[1], "a+"); |
|
|
548 |
|
240
|
549 file_info file = file_list (p); |
|
1
|
550 long offset = ftell (file.fptr ()); |
|
|
551 retval = new tree_constant[2]; |
|
|
552 retval[0] = tree_constant ((double) offset); |
|
|
553 |
|
|
554 if (offset == -1L) |
|
|
555 error ("ftell: write error"); |
|
|
556 |
|
|
557 return retval; |
|
|
558 } |
|
|
559 |
|
|
560 void |
|
164
|
561 close_files (void) |
|
1
|
562 { |
|
|
563 Pix p = file_list.first (); |
|
|
564 |
|
|
565 for (int i = 0; i < file_count; i++) |
|
|
566 { |
|
240
|
567 file_info file = file_list (p); |
|
1
|
568 if (i > 2) // do not close stdin, stdout, stderr! |
|
|
569 { |
|
|
570 int success = fclose (file.fptr ()); |
|
|
571 if (success != 0) |
|
|
572 error ("closing %s", file.name ()); |
|
|
573 } |
|
|
574 file_list.del (p); |
|
|
575 } |
|
|
576 } |
|
|
577 |
|
|
578 static int |
|
164
|
579 process_printf_format (const char *s, const tree_constant *args, |
|
|
580 ostrstream& sb, const char *type, int nargin) |
|
1
|
581 { |
|
|
582 ostrstream fmt; |
|
|
583 |
|
|
584 fmt << "%"; // do_printf() already blew past this one... |
|
|
585 |
|
|
586 tree_constant_rep::constant_type arg_type; |
|
|
587 |
|
|
588 int chars_from_fmt_str = 0; |
|
|
589 |
|
|
590 again: |
|
|
591 switch (*s) |
|
|
592 { |
|
|
593 case '+': case '-': case ' ': case '0': case '#': |
|
|
594 chars_from_fmt_str++; |
|
|
595 fmt << *s++; |
|
|
596 goto again; |
|
|
597 |
|
|
598 case '\0': |
|
|
599 goto invalid_format; |
|
|
600 |
|
|
601 default: |
|
|
602 break; |
|
|
603 } |
|
|
604 |
|
|
605 if (*s == '*') |
|
|
606 { |
|
|
607 if (fmt_arg_count >= nargin) |
|
|
608 { |
|
218
|
609 error ("%s: not enough arguments", type); |
|
1
|
610 return -1; |
|
|
611 } |
|
|
612 |
|
|
613 if (args[fmt_arg_count].const_type () |
|
|
614 != tree_constant_rep::scalar_constant) |
|
|
615 { |
|
218
|
616 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
617 return -1; |
|
|
618 } |
|
|
619 |
|
66
|
620 fmt << NINT (args[fmt_arg_count++].double_value ()); |
|
1
|
621 s++; |
|
|
622 chars_from_fmt_str++; |
|
|
623 } |
|
|
624 else |
|
|
625 { |
|
|
626 while (*s != '\0' && isdigit (*s)) |
|
|
627 { |
|
|
628 chars_from_fmt_str++; |
|
|
629 fmt << *s++; |
|
|
630 } |
|
|
631 } |
|
|
632 |
|
|
633 if (*s == '\0') |
|
|
634 goto invalid_format; |
|
|
635 |
|
|
636 if (*s == '.') |
|
|
637 { |
|
|
638 chars_from_fmt_str++; |
|
|
639 fmt << *s++; |
|
|
640 } |
|
|
641 |
|
|
642 if (*s == '*') |
|
|
643 { |
|
|
644 if (*(s-1) == '*') |
|
|
645 goto invalid_format; |
|
|
646 |
|
|
647 if (fmt_arg_count >= nargin) |
|
|
648 { |
|
218
|
649 error ("%s: not enough arguments", type); |
|
1
|
650 return -1; |
|
|
651 } |
|
|
652 |
|
|
653 if (args[fmt_arg_count].const_type () |
|
|
654 != tree_constant_rep::scalar_constant) |
|
|
655 { |
|
218
|
656 error ("%s: `*' must be replaced by an integer", type); |
|
1
|
657 return -1; |
|
|
658 } |
|
|
659 |
|
66
|
660 fmt << NINT (args[fmt_arg_count++].double_value ()); |
|
1
|
661 s++; |
|
|
662 chars_from_fmt_str++; |
|
|
663 } |
|
|
664 else |
|
|
665 { |
|
|
666 while (*s != '\0' && isdigit (*s)) |
|
|
667 { |
|
|
668 chars_from_fmt_str++; |
|
|
669 fmt << *s++; |
|
|
670 } |
|
|
671 } |
|
|
672 |
|
|
673 if (*s == '\0') |
|
|
674 goto invalid_format; |
|
|
675 |
|
|
676 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
677 { |
|
|
678 chars_from_fmt_str++; |
|
|
679 fmt << *s++; |
|
|
680 } |
|
|
681 |
|
|
682 if (*s == '\0') |
|
|
683 goto invalid_format; |
|
|
684 |
|
|
685 if (fmt_arg_count >= nargin) |
|
|
686 { |
|
218
|
687 error ("%s: not enough arguments", type); |
|
1
|
688 return -1; |
|
|
689 } |
|
|
690 |
|
|
691 arg_type = args[fmt_arg_count].const_type (); |
|
|
692 |
|
|
693 switch (*s) |
|
|
694 { |
|
|
695 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
|
696 |
|
|
697 if (arg_type != tree_constant_rep::scalar_constant) |
|
|
698 goto invalid_conversion; |
|
|
699 else |
|
|
700 { |
|
|
701 chars_from_fmt_str++; |
|
|
702 fmt << *s << ends; |
|
|
703 double d = args[fmt_arg_count++].double_value (); |
|
|
704 if ((int) d != d) |
|
|
705 goto invalid_conversion; |
|
|
706 else |
|
|
707 { |
|
|
708 char *s = fmt.str (); |
|
|
709 sb.form (s, (int) d); |
|
|
710 delete [] s; |
|
|
711 return chars_from_fmt_str; |
|
|
712 } |
|
|
713 } |
|
|
714 |
|
|
715 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
|
716 |
|
|
717 if (arg_type != tree_constant_rep::scalar_constant) |
|
|
718 goto invalid_conversion; |
|
|
719 else |
|
|
720 { |
|
|
721 chars_from_fmt_str++; |
|
|
722 fmt << *s << ends; |
|
|
723 char *s = fmt.str (); |
|
|
724 sb.form (s, args[fmt_arg_count++].double_value ()); |
|
|
725 delete [] s; |
|
|
726 return chars_from_fmt_str; |
|
|
727 } |
|
|
728 |
|
|
729 case 's': |
|
|
730 |
|
|
731 if (arg_type != tree_constant_rep::string_constant) |
|
|
732 goto invalid_conversion; |
|
|
733 else |
|
|
734 { |
|
|
735 chars_from_fmt_str++; |
|
|
736 fmt << *s << ends; |
|
|
737 char *s = fmt.str (); |
|
|
738 sb.form (s, args[fmt_arg_count++].string_value ()); |
|
|
739 delete [] s; |
|
|
740 return chars_from_fmt_str; |
|
|
741 } |
|
|
742 |
|
|
743 case 'c': |
|
|
744 |
|
|
745 if (arg_type != tree_constant_rep::string_constant) |
|
|
746 goto invalid_conversion; |
|
|
747 else |
|
|
748 { |
|
|
749 chars_from_fmt_str++; |
|
|
750 fmt << *s << ends; |
|
|
751 char *str = args[fmt_arg_count++].string_value (); |
|
|
752 if (strlen (str) != 1) |
|
|
753 goto invalid_conversion; |
|
|
754 else |
|
|
755 { |
|
|
756 char *s = fmt.str (); |
|
|
757 sb.form (s, *str); |
|
|
758 delete [] s; |
|
|
759 return chars_from_fmt_str; |
|
|
760 } |
|
|
761 } |
|
|
762 |
|
|
763 default: |
|
|
764 goto invalid_format; |
|
|
765 } |
|
|
766 |
|
|
767 invalid_conversion: |
|
218
|
768 error ("%s: invalid conversion", type); |
|
1
|
769 return -1; |
|
|
770 |
|
|
771 invalid_format: |
|
218
|
772 error ("%s: invalid format", type); |
|
1
|
773 return -1; |
|
|
774 } |
|
|
775 |
|
|
776 |
|
|
777 tree_constant * |
|
164
|
778 do_printf (const char *type, const tree_constant *args, int nargin, |
|
|
779 int nargout) |
|
1
|
780 { |
|
|
781 tree_constant *retval = NULL_TREE_CONST; |
|
|
782 fmt_arg_count = 1; |
|
|
783 char *fmt; |
|
240
|
784 file_info file; |
|
1
|
785 |
|
|
786 if (strcmp (type, "fprintf") == 0) |
|
|
787 { |
|
|
788 Pix p; |
|
|
789 |
|
|
790 if (args[2].is_string_type ()) |
|
|
791 { |
|
|
792 fmt = args[2].string_value (); |
|
|
793 fmt_arg_count++; |
|
|
794 } |
|
|
795 else |
|
|
796 { |
|
|
797 error ("%s: format must be a string", type); |
|
|
798 return retval; |
|
|
799 } |
|
|
800 |
|
|
801 if (args[1].is_scalar_type ()) |
|
|
802 { |
|
|
803 p = return_valid_file (args[1]); |
|
|
804 if (p == (Pix) NULL) |
|
|
805 return retval; |
|
|
806 } |
|
|
807 else if (args[1].is_string_type ()) |
|
|
808 { |
|
|
809 p = return_valid_file (args[1]); |
|
|
810 if (p == (Pix) NULL) |
|
|
811 p = fopen_file_for_user (args[1], "a+"); |
|
|
812 } |
|
|
813 else |
|
|
814 { |
|
|
815 error ("%s: illegal file specifier", type); |
|
|
816 return retval; |
|
|
817 } |
|
|
818 |
|
|
819 file = file_list (p); |
|
|
820 if (file.mode () == "r") |
|
|
821 { |
|
|
822 error ("%s: file is read only", type); |
|
|
823 return retval; |
|
|
824 } |
|
|
825 fmt = args[2].string_value (); |
|
|
826 fmt_arg_count++; |
|
|
827 } |
|
|
828 else if (args[1].is_string_type ()) |
|
|
829 { |
|
|
830 fmt = args[1].string_value (); |
|
|
831 fmt_arg_count++; |
|
|
832 } |
|
|
833 else |
|
|
834 { |
|
|
835 error ("%s: invalid format string", type); |
|
|
836 return retval; |
|
|
837 } |
|
|
838 |
|
|
839 // Scan fmt for % escapes and print out the arguments. |
|
|
840 |
|
|
841 ostrstream output_buf; |
|
|
842 |
|
|
843 char *ptr = fmt; |
|
|
844 |
|
|
845 for (;;) |
|
|
846 { |
|
|
847 char c; |
|
|
848 while ((c = *ptr++) != '\0' && c != '%') |
|
|
849 output_buf << c; |
|
|
850 |
|
|
851 if (c == '\0') |
|
|
852 break; |
|
|
853 |
|
|
854 if (*ptr == '%') |
|
|
855 { |
|
|
856 ptr++; |
|
|
857 output_buf << c; |
|
|
858 continue; |
|
|
859 } |
|
|
860 |
|
|
861 // We must be looking at a format specifier. Extract it or fail. |
|
|
862 |
|
|
863 |
|
|
864 int status = process_printf_format (ptr, args, output_buf, type, |
|
|
865 nargin); |
|
|
866 |
|
|
867 if (status < 0) |
|
|
868 return retval; |
|
|
869 |
|
|
870 ptr += status; |
|
|
871 } |
|
|
872 |
|
|
873 output_buf << ends; |
|
|
874 if (strcmp (type, "printf") == 0 |
|
|
875 || (strcmp (type, "fprintf") == 0 && file.number () == 1)) |
|
|
876 { |
|
|
877 maybe_page_output (output_buf); |
|
|
878 } |
|
|
879 else if (strcmp (type, "fprintf") == 0) |
|
|
880 { |
|
|
881 char *msg = output_buf.str (); |
|
|
882 int success = fputs (msg, file.fptr ()); |
|
|
883 if (success == EOF) |
|
218
|
884 warning ("%s: unknown failure writing to file", type); |
|
1
|
885 delete [] msg; |
|
|
886 } |
|
|
887 else if (strcmp (type, "sprintf") == 0) |
|
|
888 { |
|
|
889 retval = new tree_constant [2]; |
|
|
890 char *msg = output_buf.str (); |
|
|
891 retval[0] = tree_constant (msg); |
|
|
892 delete [] msg; |
|
|
893 } |
|
|
894 |
|
|
895 return retval; |
|
|
896 } |
|
|
897 |
|
|
898 static int |
|
164
|
899 process_scanf_format (const char *s, const tree_constant *args, |
|
|
900 ostrstream& fmt, const char *type, int nargout, |
|
|
901 FILE* fptr, tree_constant *values) |
|
1
|
902 { |
|
|
903 fmt << "%"; |
|
|
904 |
|
|
905 tree_constant_rep::constant_type arg_type; |
|
|
906 |
|
|
907 int chars_from_fmt_str = 0; |
|
|
908 int store_value = 1; |
|
|
909 int string_width = -1; |
|
|
910 int success = 1; |
|
|
911 |
|
|
912 if (*s == '*') |
|
|
913 { |
|
|
914 store_value = 0; |
|
|
915 s++; |
|
|
916 chars_from_fmt_str++; |
|
|
917 } |
|
|
918 |
|
|
919 if (isdigit (*s)) |
|
|
920 { |
|
|
921 ostrstream str_number; |
|
|
922 while (*s != '\0' && isdigit (*s)) |
|
|
923 { |
|
|
924 chars_from_fmt_str++; |
|
|
925 str_number << *s; |
|
|
926 fmt << *s++; |
|
|
927 } |
|
|
928 str_number << ends; |
|
|
929 char *number = str_number.str (); |
|
|
930 string_width = atoi (number); |
|
|
931 delete [] number; |
|
|
932 } |
|
|
933 |
|
|
934 if (*s == '\0') |
|
|
935 goto invalid_format; |
|
|
936 |
|
|
937 if (*s != '\0' && (*s == 'h' || *s == 'l' || *s == 'L')) |
|
|
938 { |
|
|
939 chars_from_fmt_str++; |
|
|
940 s++; |
|
|
941 } |
|
|
942 |
|
|
943 if (*s == '\0') |
|
|
944 goto invalid_format; |
|
|
945 |
|
|
946 if (fmt_arg_count >= nargout && store_value) |
|
|
947 { |
|
218
|
948 error ("%s: not enough arguments", type); |
|
1
|
949 return -1; |
|
|
950 } |
|
|
951 |
|
|
952 arg_type = args[fmt_arg_count].const_type (); |
|
|
953 |
|
|
954 switch (*s) |
|
|
955 { |
|
|
956 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': |
|
|
957 { |
|
|
958 chars_from_fmt_str++; |
|
|
959 fmt << *s << ends; |
|
|
960 int temp; |
|
|
961 char *str = fmt.str (); |
|
|
962 success = fscanf (fptr, str, &temp); |
|
|
963 delete [] str; |
|
|
964 if (success > 0 && store_value) |
|
|
965 values[fmt_arg_count++] = tree_constant ((double) temp); |
|
|
966 } |
|
|
967 break; |
|
|
968 case 'e': case 'E': case 'f': case 'g': case 'G': |
|
|
969 { |
|
|
970 chars_from_fmt_str++; |
|
|
971 fmt << 'l' << *s << ends; |
|
|
972 double temp; |
|
|
973 char *str = fmt.str (); |
|
|
974 success = fscanf (fptr, str, &temp); |
|
|
975 delete [] str; |
|
|
976 if (success > 0 && store_value) |
|
|
977 values[fmt_arg_count++] = tree_constant (temp); |
|
|
978 } |
|
|
979 break; |
|
|
980 case 's': |
|
|
981 { |
|
|
982 if (string_width < 1) |
|
|
983 { |
|
|
984 string_width = 0; |
|
|
985 long original_position = ftell (fptr); |
|
|
986 int c; |
|
|
987 |
|
|
988 while ((c = getc (fptr)) != EOF |
|
|
989 && (c == ' ' || c == '\n' || c != '\t')) |
|
|
990 ; // Don't count leading whitespace. |
|
|
991 |
|
|
992 if (c != EOF) |
|
|
993 string_width++; |
|
|
994 |
|
|
995 for (;;) |
|
|
996 { |
|
|
997 c = getc (fptr); |
|
|
998 if (c != EOF && c != ' ' && c != '\n' && c != '\t') |
|
|
999 string_width++; |
|
|
1000 else |
|
|
1001 break; |
|
|
1002 } |
|
|
1003 |
|
|
1004 fseek (fptr, original_position, SEEK_SET); |
|
|
1005 } |
|
|
1006 chars_from_fmt_str++; |
|
|
1007 char temp[string_width+1]; |
|
|
1008 fmt << *s << ends; |
|
|
1009 char *str = fmt.str (); |
|
|
1010 success = fscanf (fptr, str, temp); |
|
|
1011 delete [] str; |
|
|
1012 if (success && store_value) |
|
|
1013 values[fmt_arg_count++] = tree_constant (temp); |
|
|
1014 } |
|
|
1015 break; |
|
|
1016 case 'c': |
|
|
1017 { |
|
|
1018 if (string_width < 1) |
|
|
1019 string_width = 1; |
|
|
1020 chars_from_fmt_str++; |
|
|
1021 char temp[string_width+1]; |
|
|
1022 memset (temp, '\0', string_width+1); |
|
|
1023 fmt << *s << ends; |
|
|
1024 char *str = fmt.str (); |
|
|
1025 success = fscanf (fptr, str, temp); |
|
|
1026 delete [] str; |
|
|
1027 temp[string_width] = '\0'; |
|
|
1028 if (success > 0 && store_value) |
|
|
1029 values[fmt_arg_count++] = tree_constant (temp); |
|
|
1030 } |
|
|
1031 break; |
|
|
1032 default: |
|
|
1033 goto invalid_format; |
|
|
1034 } |
|
|
1035 |
|
|
1036 if (success > 0 || (success == 0 && store_value == 0)) |
|
|
1037 return chars_from_fmt_str; |
|
|
1038 |
|
|
1039 if (success == 0) |
|
218
|
1040 warning ("%s: invalid conversion", type); |
|
1
|
1041 else if (success == EOF) |
|
|
1042 { |
|
|
1043 if (strcmp (type, "fscanf") == 0) |
|
218
|
1044 warning ("%s: end of file reached before final conversion", type); |
|
1
|
1045 else if (strcmp (type, "sscanf") == 0) |
|
218
|
1046 warning ("%s: end of string reached before final conversion", type); |
|
1
|
1047 else if (strcmp (type, "scanf") == 0) |
|
218
|
1048 warning ("%s: end of input reached before final conversion", type); |
|
1
|
1049 } |
|
|
1050 else |
|
|
1051 { |
|
|
1052 invalid_format: |
|
218
|
1053 warning ("%s: invalid format", type); |
|
1
|
1054 } |
|
|
1055 |
|
|
1056 return -1; |
|
|
1057 } |
|
|
1058 |
|
|
1059 tree_constant * |
|
164
|
1060 do_scanf (const char *type, const tree_constant *args, int nargin, int nargout) |
|
1
|
1061 { |
|
|
1062 tree_constant *retval = NULL_TREE_CONST; |
|
|
1063 char *scanf_fmt = (char *) NULL; |
|
|
1064 char *tmp_file = (char *) NULL; |
|
|
1065 int tmp_file_open = 0; |
|
|
1066 FILE *fptr = (FILE *) NULL; |
|
240
|
1067 file_info file; |
|
1
|
1068 |
|
|
1069 fmt_arg_count = 0; |
|
|
1070 |
|
|
1071 if (strcmp (type, "scanf") != 0) |
|
|
1072 { |
|
|
1073 if ( args[2].is_string_type ()) |
|
|
1074 scanf_fmt = args[2].string_value (); |
|
|
1075 else |
|
|
1076 { |
|
|
1077 error ("%s: format must be a string", type); |
|
|
1078 return retval; |
|
|
1079 } |
|
|
1080 } |
|
|
1081 |
|
|
1082 int doing_fscanf = (strcmp (type, "fscanf") == 0); |
|
|
1083 |
|
|
1084 if (doing_fscanf) |
|
|
1085 { |
|
|
1086 Pix p; |
|
|
1087 if (args[1].is_scalar_type () |
|
|
1088 || args[1].is_string_type ()) |
|
|
1089 { |
|
|
1090 p = return_valid_file (args[1]); |
|
|
1091 if (p == (Pix) NULL) |
|
|
1092 return retval; |
|
|
1093 } |
|
|
1094 else |
|
|
1095 { |
|
|
1096 error ("%s: illegal file specifier", type); |
|
|
1097 return retval; |
|
|
1098 } |
|
|
1099 |
|
|
1100 file = file_list (p); |
|
|
1101 |
|
|
1102 if (strcmp (file.mode (), "w") == 0 || strcmp (file.mode (), "a") == 0) |
|
|
1103 { |
|
|
1104 error ("%s: this file is opened for writing only", type); |
|
|
1105 return retval; |
|
|
1106 } |
|
|
1107 |
|
|
1108 fptr = file.fptr (); |
|
|
1109 } |
|
|
1110 |
|
|
1111 if (args[1].is_string_type () || (doing_fscanf && file.number () == 0)) |
|
|
1112 { |
|
|
1113 char *string; |
|
|
1114 |
|
|
1115 if (strcmp (type, "scanf") == 0) |
|
|
1116 scanf_fmt = args[1].string_value (); |
|
|
1117 |
|
|
1118 if (strcmp (type, "scanf") == 0 |
|
|
1119 || (doing_fscanf && file.number () == 0)) |
|
|
1120 { |
|
|
1121 string = gnu_readline (""); |
|
|
1122 if (string && *string) |
|
|
1123 maybe_save_history (string); |
|
|
1124 } |
|
|
1125 else |
|
|
1126 string = args[1].string_value (); |
|
|
1127 |
|
|
1128 tmp_file = tmpnam ((char *) NULL); |
|
|
1129 |
|
|
1130 fptr = fopen (tmp_file, "w+"); |
|
|
1131 if (fptr == (FILE *) NULL) |
|
|
1132 { |
|
|
1133 error ("%s: error opening temporary file", type); |
|
|
1134 return retval; |
|
|
1135 } |
|
|
1136 tmp_file_open = 1; |
|
|
1137 unlink (tmp_file); |
|
|
1138 |
|
|
1139 if (string == (char *) NULL) |
|
|
1140 panic_impossible (); |
|
|
1141 |
|
|
1142 int success = fputs (string, fptr); |
|
|
1143 fflush (fptr); |
|
|
1144 rewind (fptr); |
|
|
1145 |
|
|
1146 if (success < 0) |
|
|
1147 { |
|
|
1148 error ("%s: trouble writing temporary file", type); |
|
|
1149 fclose (fptr); |
|
|
1150 return retval; |
|
|
1151 } |
|
|
1152 } |
|
|
1153 else if (! doing_fscanf) |
|
|
1154 { |
|
|
1155 error ("%s: first argument must be a string", type); |
|
|
1156 return retval; |
|
|
1157 } |
|
|
1158 |
|
|
1159 // Scan scanf_fmt for % escapes and assign the arguments. |
|
|
1160 |
|
|
1161 retval = new tree_constant[nargout+1]; |
|
|
1162 |
|
|
1163 char *ptr = scanf_fmt; |
|
|
1164 |
|
|
1165 for (;;) |
|
|
1166 { |
|
|
1167 ostrstream fmt; |
|
|
1168 char c; |
|
|
1169 while ((c = *ptr++) != '\0' && c != '%') |
|
|
1170 fmt << c; |
|
|
1171 |
|
|
1172 if (c == '\0') |
|
|
1173 break; |
|
|
1174 |
|
|
1175 if (*ptr == '%') |
|
|
1176 { |
|
|
1177 ptr++; |
|
|
1178 fmt << c; |
|
|
1179 continue; |
|
|
1180 } |
|
|
1181 |
|
|
1182 // We must be looking at a format specifier. Extract it or fail. |
|
|
1183 |
|
|
1184 int status = process_scanf_format (ptr, args, fmt, type, |
|
|
1185 nargout, fptr, retval); |
|
|
1186 |
|
|
1187 if (status < 0) |
|
|
1188 { |
|
|
1189 if (fmt_arg_count == 0) |
|
|
1190 { |
|
|
1191 delete [] retval; |
|
|
1192 retval = NULL_TREE_CONST; |
|
|
1193 } |
|
|
1194 break; |
|
|
1195 } |
|
|
1196 |
|
|
1197 ptr += status; |
|
|
1198 } |
|
|
1199 |
|
|
1200 if (tmp_file_open) |
|
|
1201 fclose (fptr); |
|
|
1202 |
|
|
1203 return retval; |
|
|
1204 } |
|
|
1205 |
|
|
1206 /* |
|
|
1207 ;;; Local Variables: *** |
|
|
1208 ;;; mode: C++ *** |
|
|
1209 ;;; page-delimiter: "^/\\*" *** |
|
|
1210 ;;; End: *** |
|
|
1211 */ |
