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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cfloat> |
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29 #include <cstring> |
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30 #include <cctype> |
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31 |
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32 #include <fstream> |
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33 #include <iomanip> |
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34 #include <iostream> |
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35 #include <sstream> |
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36 #include <string> |
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37 |
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38 #include "byte-swap.h" |
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39 #include "data-conv.h" |
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40 #include "file-ops.h" |
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41 #include "glob-match.h" |
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42 #include "lo-mappers.h" |
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43 #include "mach-info.h" |
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44 #include "oct-env.h" |
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45 #include "oct-time.h" |
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46 #include "quit.h" |
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47 #include "str-vec.h" |
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48 |
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49 #include "Cell.h" |
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50 #include "defun.h" |
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51 #include "error.h" |
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52 #include "gripes.h" |
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53 #include "lex.h" |
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54 #include "load-save.h" |
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55 #include "oct-obj.h" |
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56 #include "oct-map.h" |
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57 #include "ov-cell.h" |
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58 #include "pager.h" |
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59 #include "pt-exp.h" |
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60 #include "symtab.h" |
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61 #include "sysdep.h" |
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62 #include "unwind-prot.h" |
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63 #include "utils.h" |
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64 #include "variables.h" |
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65 #include "version.h" |
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66 #include "dMatrix.h" |
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67 |
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68 #include "ls-mat-ascii.h" |
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69 |
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70 static std::string |
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71 get_mat_data_input_line (std::istream& is) |
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72 { |
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73 std::string retval; |
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74 |
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75 bool have_data = false; |
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76 |
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77 do |
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78 { |
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79 retval = ""; |
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80 |
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81 char c; |
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82 while (is.get (c)) |
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83 { |
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84 if (c == '\n' || c == '\r') |
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85 break; |
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86 |
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87 if (c == '%' || c == '#') |
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88 { |
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89 // skip to end of line |
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90 while (is.get (c)) |
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91 if (c == '\n' || c == '\r') |
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92 break; |
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93 |
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94 break; |
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95 } |
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96 |
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97 if (! is.eof ()) |
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98 { |
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99 if (! have_data && c != ' ' && c != '\t') |
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100 have_data = true; |
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101 |
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102 retval += c; |
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103 } |
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104 } |
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105 } |
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106 while (! (have_data || is.eof ())); |
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107 |
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108 return retval; |
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109 } |
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110 |
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111 static void |
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112 get_lines_and_columns (std::istream& is, const std::string& filename, octave_idx_type& nr, octave_idx_type& nc) |
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113 { |
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114 std::streampos pos = is.tellg (); |
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115 |
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116 int file_line_number = 0; |
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117 |
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118 nr = 0; |
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119 nc = 0; |
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120 |
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121 while (is && ! error_state) |
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122 { |
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123 OCTAVE_QUIT; |
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124 |
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125 std::string buf = get_mat_data_input_line (is); |
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126 |
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127 file_line_number++; |
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128 |
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129 size_t beg = buf.find_first_not_of (", \t"); |
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130 |
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131 // If we see a CR as the last character in the buffer, we had a |
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132 // CRLF pair as the line separator. Any other CR in the text |
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133 // will not be considered as whitespace. |
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134 |
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135 if (beg != NPOS && buf[beg] == '\r' && beg == buf.length () - 1) |
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136 { |
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137 // We had a blank line ending with a CRLF. Handle it the |
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138 // same as an empty line. |
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139 beg = NPOS; |
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140 } |
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141 |
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142 octave_idx_type tmp_nc = 0; |
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143 |
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144 while (beg != NPOS) |
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145 { |
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146 tmp_nc++; |
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147 |
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148 size_t end = buf.find_first_of (", \t", beg); |
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149 |
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150 if (end != NPOS) |
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151 { |
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152 beg = buf.find_first_not_of (", \t", end); |
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153 |
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154 if (beg == NPOS || (buf[beg] == '\r' && |
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155 beg == buf.length () - 1)) |
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156 { |
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157 // We had a line with trailing spaces and |
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158 // ending with a CRLF, so this should look like EOL, |
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159 // not a new colum. |
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160 break; |
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161 } |
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162 } |
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163 else |
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164 break; |
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165 } |
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166 |
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167 if (tmp_nc > 0) |
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168 { |
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169 if (nc == 0) |
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170 { |
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171 nc = tmp_nc; |
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172 nr++; |
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173 } |
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174 else if (nc == tmp_nc) |
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175 nr++; |
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176 else |
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177 error ("load: %s: inconsistent number of columns near line %d", |
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178 filename.c_str (), file_line_number); |
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179 } |
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180 } |
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181 |
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182 if (nr == 0 || nc == 0) |
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183 error ("load: file `%s' seems to be empty!", filename.c_str ()); |
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184 |
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185 is.clear (); |
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186 is.seekg (pos); |
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187 } |
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188 |
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189 // Extract a matrix from a file of numbers only. |
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190 // |
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191 // Comments are not allowed. The file should only have numeric values. |
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192 // |
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193 // Reads the file twice. Once to find the number of rows and columns, |
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194 // and once to extract the matrix. |
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195 // |
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196 // FILENAME is used for error messages. |
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197 // |
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198 // This format provides no way to tag the data as global. |
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199 |
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200 std::string |
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201 read_mat_ascii_data (std::istream& is, const std::string& filename, |
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202 octave_value& tc) |
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203 { |
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204 std::string retval; |
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205 |
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206 std::string varname; |
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207 |
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208 size_t pos = filename.rfind ('/'); |
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209 |
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210 if (pos != NPOS) |
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211 varname = filename.substr (pos+1); |
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212 else |
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213 varname = filename; |
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214 |
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215 pos = varname.rfind ('.'); |
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216 |
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217 if (pos != NPOS) |
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218 varname = varname.substr (0, pos); |
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219 |
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220 size_t len = varname.length (); |
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221 for (size_t i = 0; i < len; i++) |
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222 { |
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223 char c = varname[i]; |
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224 if (! (isalnum (c) || c == '_')) |
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225 varname[i] = '_'; |
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226 } |
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227 |
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228 if (is_keyword (varname) || ! isalpha (varname[0])) |
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229 varname.insert (0, "X"); |
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230 |
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231 if (valid_identifier (varname)) |
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232 { |
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233 octave_idx_type nr = 0; |
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234 octave_idx_type nc = 0; |
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235 |
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236 int total_count = 0; |
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237 |
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238 get_lines_and_columns (is, filename, nr, nc); |
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239 |
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240 OCTAVE_QUIT; |
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241 |
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242 if (! error_state && nr > 0 && nc > 0) |
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243 { |
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244 Matrix tmp (nr, nc); |
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245 |
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246 if (nr < 1 || nc < 1) |
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247 is.clear (std::ios::badbit); |
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248 else |
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249 { |
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250 double d; |
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251 for (octave_idx_type i = 0; i < nr; i++) |
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252 { |
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253 std::string buf = get_mat_data_input_line (is); |
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254 |
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255 std::istringstream tmp_stream (buf); |
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256 |
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257 for (octave_idx_type j = 0; j < nc; j++) |
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258 { |
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259 OCTAVE_QUIT; |
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260 |
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261 d = octave_read_double (tmp_stream); |
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262 |
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263 if (tmp_stream || tmp_stream.eof ()) |
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264 { |
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265 tmp.elem (i, j) = d; |
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266 total_count++; |
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267 |
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268 // Skip whitespace and commas. |
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269 char c; |
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270 while (1) |
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271 { |
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272 tmp_stream >> c; |
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273 |
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274 if (! tmp_stream) |
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275 break; |
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276 |
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277 if (! (c == ' ' || c == '\t' || c == ',')) |
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278 { |
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279 tmp_stream.putback (c); |
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280 break; |
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281 } |
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282 } |
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283 |
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284 if (tmp_stream.eof ()) |
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285 break; |
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286 } |
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287 else |
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288 { |
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289 error ("load: failed to read matrix from file `%s'", |
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290 filename.c_str ()); |
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291 |
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292 return retval; |
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293 } |
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294 |
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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 if (is || is.eof ()) |
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300 { |
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301 // FIXME -- not sure this is best, but it works. |
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302 |
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303 if (is.eof ()) |
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304 is.clear (); |
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305 |
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306 octave_idx_type expected = nr * nc; |
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307 |
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308 if (expected == total_count) |
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309 { |
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310 tc = tmp; |
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311 retval = varname; |
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312 } |
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313 else |
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314 error ("load: expected %d elements, found %d", |
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315 expected, total_count); |
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316 } |
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317 else |
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318 error ("load: failed to read matrix from file `%s'", |
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319 filename.c_str ()); |
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320 } |
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321 else |
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322 error ("load: unable to extract matrix size from file `%s'", |
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323 filename.c_str ()); |
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324 } |
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325 else |
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326 error ("load: unable to convert filename `%s' to valid identifier", |
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327 filename.c_str ()); |
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328 |
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329 return retval; |
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330 } |
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331 |
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332 bool |
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333 save_mat_ascii_data (std::ostream& os, const octave_value& val, |
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334 int precision) |
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335 { |
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336 bool success = true; |
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337 |
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338 if (val.is_complex_type ()) |
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339 warning ("save: omitting imaginary part for ASCII file"); |
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340 |
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341 Matrix m = val.matrix_value (true); |
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342 |
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343 if (error_state) |
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344 { |
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345 success = false; |
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346 |
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347 error_state = 0; |
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348 } |
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349 else |
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350 { |
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351 long old_precision = os.precision (); |
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352 |
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353 os.precision (precision); |
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354 |
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355 std::ios::fmtflags oflags |
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356 = os.flags (static_cast<std::ios::fmtflags> (std::ios::scientific)); |
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357 |
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358 os << m; |
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359 |
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360 os.flags (oflags); |
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361 |
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362 os.precision (old_precision); |
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363 } |
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364 |
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365 return (os && success); |
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366 } |
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367 |
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368 /* |
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369 ;;; Local Variables: *** |
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370 ;;; mode: C++ *** |
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371 ;;; End: *** |
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372 */ |
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373 |
