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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cfloat> |
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28 #include <cstring> |
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29 #include <cctype> |
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30 |
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31 #include <fstream> |
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32 #include <iomanip> |
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33 #include <iostream> |
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34 #include <string> |
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35 |
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36 #include "byte-swap.h" |
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37 #include "data-conv.h" |
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38 #include "file-ops.h" |
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39 #include "glob-match.h" |
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40 #include "lo-mappers.h" |
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41 #include "lo-sstream.h" |
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42 #include "mach-info.h" |
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43 #include "oct-env.h" |
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44 #include "oct-time.h" |
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45 #include "quit.h" |
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46 #include "str-vec.h" |
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47 |
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48 #include "Cell.h" |
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49 #include "defun.h" |
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50 #include "error.h" |
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51 #include "gripes.h" |
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52 #include "lex.h" |
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53 #include "load-save.h" |
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54 #include "oct-obj.h" |
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55 #include "oct-map.h" |
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56 #include "ov-cell.h" |
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57 #include "pager.h" |
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58 #include "pt-exp.h" |
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59 #include "symtab.h" |
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60 #include "sysdep.h" |
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61 #include "unwind-prot.h" |
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62 #include "utils.h" |
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63 #include "variables.h" |
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64 #include "version.h" |
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65 #include "dMatrix.h" |
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66 |
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67 #include "ls-mat-ascii.h" |
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68 |
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69 static std::string |
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70 get_mat_data_input_line (std::istream& is) |
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71 { |
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72 std::string retval; |
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73 |
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74 bool have_data = false; |
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75 |
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76 do |
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77 { |
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78 retval = ""; |
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79 |
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80 char c; |
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81 while (is.get (c)) |
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82 { |
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83 if (c == '\n' || c == '\r') |
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84 break; |
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85 |
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86 if (c == '%' || c == '#') |
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87 { |
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88 // skip to end of line |
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89 while (is.get (c)) |
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90 if (c == '\n' || c == '\r') |
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91 break; |
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92 |
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93 break; |
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94 } |
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95 |
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96 if (! is.eof ()) |
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97 { |
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98 if (! have_data && c != ' ' && c != '\t') |
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99 have_data = true; |
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100 |
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101 retval += c; |
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102 } |
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103 } |
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104 } |
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105 while (! (have_data || is.eof ())); |
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106 |
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107 return retval; |
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108 } |
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109 |
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110 static void |
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111 get_lines_and_columns (std::istream& is, const std::string& filename, int& nr, int& nc) |
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112 { |
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113 std::streampos pos = is.tellg (); |
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114 |
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115 int file_line_number = 0; |
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116 |
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117 nr = 0; |
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118 nc = 0; |
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119 |
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120 while (is && ! error_state) |
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121 { |
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122 OCTAVE_QUIT; |
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123 |
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124 std::string buf = get_mat_data_input_line (is); |
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125 |
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126 file_line_number++; |
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127 |
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128 size_t beg = buf.find_first_not_of (", \t"); |
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129 |
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130 // If we see a CR as the last character in the buffer, we had a |
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131 // CRLF pair as the line separator. Any other CR in the text |
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132 // will not be considered as whitespace. |
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133 |
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134 if (beg != NPOS && buf[beg] == '\r' && beg == buf.length () - 1) |
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135 { |
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136 // We had a blank line ending with a CRLF. Handle it the |
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137 // same as an empty line. |
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138 beg = NPOS; |
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139 } |
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140 |
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141 int tmp_nc = 0; |
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142 |
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143 while (beg != NPOS) |
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144 { |
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145 tmp_nc++; |
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146 |
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147 size_t end = buf.find_first_of (", \t", beg); |
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148 |
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149 if (end != NPOS) |
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150 { |
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151 beg = buf.find_first_not_of (", \t", end); |
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152 |
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153 if (buf[beg] == '\r' && beg == buf.length () - 1) |
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154 { |
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155 // We had a line with trailing spaces and |
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156 // ending with a CRLF, so this should look like EOL, |
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157 // not a new colum. |
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158 break; |
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159 } |
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160 } |
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161 else |
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162 break; |
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163 } |
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164 |
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165 if (tmp_nc > 0) |
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166 { |
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167 if (nc == 0) |
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168 { |
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169 nc = tmp_nc; |
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170 nr++; |
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171 } |
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172 else if (nc == tmp_nc) |
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173 nr++; |
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174 else |
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175 error ("load: %s: inconsistent number of columns near line %d", |
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176 filename.c_str (), file_line_number); |
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177 } |
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178 } |
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179 |
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180 if (nr == 0 || nc == 0) |
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181 error ("load: file `%s' seems to be empty!", filename.c_str ()); |
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182 |
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183 is.clear (); |
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184 is.seekg (pos); |
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185 } |
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186 |
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187 // Extract a matrix from a file of numbers only. |
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188 // |
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189 // Comments are not allowed. The file should only have numeric values. |
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190 // |
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191 // Reads the file twice. Once to find the number of rows and columns, |
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192 // and once to extract the matrix. |
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193 // |
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194 // FILENAME is used for error messages. |
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195 // |
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196 // This format provides no way to tag the data as global. |
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197 |
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198 std::string |
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199 read_mat_ascii_data (std::istream& is, const std::string& filename, |
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200 octave_value& tc) |
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201 { |
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202 std::string retval; |
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203 |
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204 std::string varname; |
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205 |
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206 size_t pos = filename.rfind ('/'); |
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207 |
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208 if (pos != NPOS) |
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209 varname = filename.substr (pos+1); |
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210 else |
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211 varname = filename; |
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212 |
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213 pos = varname.rfind ('.'); |
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214 |
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215 if (pos != NPOS) |
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216 varname = varname.substr (0, pos); |
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217 |
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218 size_t len = varname.length (); |
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219 for (size_t i = 0; i < len; i++) |
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220 { |
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221 char c = varname[i]; |
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222 if (! (isalnum (c) || c == '_')) |
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223 varname[i] = '_'; |
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224 } |
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225 |
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226 if (is_keyword (varname) || ! isalpha (varname[0])) |
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227 varname.insert (0, "X"); |
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228 |
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229 if (valid_identifier (varname)) |
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230 { |
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231 int nr = 0; |
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232 int nc = 0; |
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233 |
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234 int total_count = 0; |
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235 |
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236 get_lines_and_columns (is, filename, nr, nc); |
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237 |
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238 OCTAVE_QUIT; |
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239 |
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240 if (! error_state && nr > 0 && nc > 0) |
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241 { |
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242 Matrix tmp (nr, nc); |
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243 |
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244 if (nr < 1 || nc < 1) |
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245 is.clear (std::ios::badbit); |
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246 else |
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247 { |
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248 double d; |
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249 for (int i = 0; i < nr; i++) |
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250 { |
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251 std::string buf = get_mat_data_input_line (is); |
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252 |
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253 #ifdef HAVE_SSTREAM |
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254 std::istringstream tmp_stream (buf); |
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255 #else |
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256 std::istrstream tmp_stream (buf.c_str ()); |
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257 #endif |
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258 |
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259 for (int j = 0; j < nc; j++) |
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260 { |
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261 OCTAVE_QUIT; |
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262 |
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263 d = octave_read_double (tmp_stream); |
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264 |
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265 if (tmp_stream || tmp_stream.eof ()) |
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266 { |
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267 tmp.elem (i, j) = d; |
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268 total_count++; |
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269 |
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270 // Skip whitespace and commas. |
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271 char c; |
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272 while (1) |
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273 { |
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274 tmp_stream >> c; |
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275 |
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276 if (! tmp_stream) |
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277 break; |
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278 |
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279 if (! (c == ' ' || c == '\t' || c == ',')) |
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280 { |
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281 tmp_stream.putback (c); |
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282 break; |
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283 } |
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284 } |
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285 |
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286 if (tmp_stream.eof ()) |
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287 break; |
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288 } |
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289 else |
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290 { |
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291 error ("load: failed to read matrix from file `%s'", |
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292 filename.c_str ()); |
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293 |
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294 return retval; |
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295 } |
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296 |
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297 } |
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298 } |
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299 } |
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300 |
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301 if (is || is.eof ()) |
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302 { |
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303 // XXX FIXME XXX -- not sure this is best, but it works. |
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304 |
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305 if (is.eof ()) |
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306 is.clear (); |
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307 |
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308 int expected = nr * nc; |
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309 |
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310 if (expected == total_count) |
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311 { |
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312 tc = tmp; |
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313 retval = varname; |
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314 } |
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315 else |
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316 error ("load: expected %d elements, found %d", |
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317 expected, total_count); |
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318 } |
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319 else |
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320 error ("load: failed to read matrix from file `%s'", |
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321 filename.c_str ()); |
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322 } |
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323 else |
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324 error ("load: unable to extract matrix size from file `%s'", |
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325 filename.c_str ()); |
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326 } |
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327 else |
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328 error ("load: unable to convert filename `%s' to valid identifier", |
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329 filename.c_str ()); |
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330 |
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331 return retval; |
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332 } |
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333 |
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334 /* |
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335 ;;; Local Variables: *** |
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336 ;;; mode: C++ *** |
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337 ;;; End: *** |
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338 */ |
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339 |
