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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 // Author: John W. Eaton. |
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24 |
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25 #ifdef HAVE_CONFIG_H |
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26 #include <config.h> |
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27 #endif |
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28 |
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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 <string> |
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36 |
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37 #include "byte-swap.h" |
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38 #include "data-conv.h" |
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39 #include "file-ops.h" |
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40 #include "glob-match.h" |
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41 #include "lo-mappers.h" |
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42 #include "lo-sstream.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 "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-oct-ascii.h" |
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68 |
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69 // The number of decimal digits to use when writing ascii data. |
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70 static int Vsave_precision; |
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71 |
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72 // Functions for reading ascii data. |
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73 |
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74 static Matrix |
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75 strip_infnan (const Matrix& m) |
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76 { |
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77 int nr = m.rows (); |
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78 int nc = m.columns (); |
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79 |
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80 Matrix retval (nr, nc); |
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81 |
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82 int k = 0; |
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83 for (int i = 0; i < nr; i++) |
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84 { |
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85 for (int j = 0; j < nc; j++) |
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86 { |
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87 double d = m (i, j); |
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88 if (xisnan (d)) |
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89 goto next_row; |
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90 else |
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91 retval (k, j) = xisinf (d) ? (d > 0 ? OCT_RBV : -OCT_RBV) : d; |
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92 } |
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93 k++; |
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94 |
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95 next_row: |
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96 continue; |
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97 } |
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98 |
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99 if (k > 0) |
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100 retval.resize (k, nc); |
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101 |
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102 return retval; |
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103 } |
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104 |
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105 // Extract a KEYWORD and its value from stream IS, returning the |
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106 // associated value in a new string. |
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107 // |
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108 // Input should look something like: |
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109 // |
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110 // [%#][ \t]*keyword[ \t]*:[ \t]*string-value[ \t]*\n |
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111 |
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112 std::string |
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113 extract_keyword (std::istream& is, const char *keyword, const bool next_only) |
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114 { |
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115 std::string retval; |
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116 |
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117 char c; |
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118 while (is.get (c)) |
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119 { |
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120 if (c == '%' || c == '#') |
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121 { |
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122 OSSTREAM buf; |
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123 |
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124 while (is.get (c) && (c == ' ' || c == '\t' || c == '%' || c == '#')) |
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125 ; // Skip whitespace and comment characters. |
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126 |
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127 if (isalpha (c)) |
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128 buf << c; |
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129 |
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130 while (is.get (c) && isalpha (c)) |
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131 buf << c; |
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132 |
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133 buf << OSSTREAM_ENDS; |
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134 const char *tmp = OSSTREAM_C_STR (buf); |
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135 OSSTREAM_FREEZE (buf); |
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136 int match = (strncmp (tmp, keyword, strlen (keyword)) == 0); |
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137 |
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138 if (match) |
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139 { |
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140 OSSTREAM value; |
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141 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
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142 ; // Skip whitespace and the colon. |
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143 |
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144 if (c != '\n') |
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145 { |
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146 value << c; |
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147 while (is.get (c) && c != '\n') |
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148 value << c; |
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149 } |
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150 value << OSSTREAM_ENDS; |
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151 retval = OSSTREAM_STR (value); |
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152 OSSTREAM_FREEZE (value); |
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153 break; |
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154 } |
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155 else if (next_only) |
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156 break; |
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157 } |
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158 } |
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159 |
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160 int len = retval.length (); |
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161 |
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162 if (len > 0) |
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163 { |
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164 while (len) |
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165 { |
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166 c = retval[len-1]; |
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167 |
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168 if (c == ' ' || c == '\t') |
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169 len--; |
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170 else |
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171 { |
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172 retval.resize (len); |
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173 break; |
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174 } |
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175 } |
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176 } |
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177 |
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178 return retval; |
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179 } |
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180 |
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181 // Match KEYWORD on stream IS, placing the associated value in VALUE, |
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182 // returning TRUE if successful and FALSE otherwise. |
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183 // |
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184 // Input should look something like: |
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185 // |
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186 // [%#][ \t]*keyword[ \t]*int-value.*\n |
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187 |
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188 bool |
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189 extract_keyword (std::istream& is, const char *keyword, int& value, |
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190 const bool next_only) |
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191 { |
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192 bool status = false; |
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193 value = 0; |
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194 |
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195 char c; |
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196 while (is.get (c)) |
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197 { |
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198 if (c == '%' || c == '#') |
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199 { |
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200 OSSTREAM buf; |
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201 |
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202 while (is.get (c) && (c == ' ' || c == '\t' || c == '%' || c == '#')) |
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203 ; // Skip whitespace and comment characters. |
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204 |
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205 if (isalpha (c)) |
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206 buf << c; |
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207 |
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208 while (is.get (c) && isalpha (c)) |
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209 buf << c; |
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210 |
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211 buf << OSSTREAM_ENDS; |
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212 const char *tmp = OSSTREAM_C_STR (buf); |
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213 int match = (strncmp (tmp, keyword, strlen (keyword)) == 0); |
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214 OSSTREAM_FREEZE (buf); |
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215 |
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216 if (match) |
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217 { |
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218 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
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219 ; // Skip whitespace and the colon. |
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220 |
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221 is.putback (c); |
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222 if (c != '\n') |
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223 is >> value; |
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224 if (is) |
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225 status = true; |
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226 while (is.get (c) && c != '\n') |
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227 ; // Skip to beginning of next line; |
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228 break; |
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229 } |
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230 else if (next_only) |
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231 break; |
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232 } |
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233 } |
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234 return status; |
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235 } |
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236 |
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237 // Extract one value (scalar, matrix, string, etc.) from stream IS and |
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238 // place it in TC, returning the name of the variable. If the value |
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239 // is tagged as global in the file, return TRUE in GLOBAL. |
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240 // |
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241 // Each type supplies its own function to load the data, and so this |
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242 // function is extensible. |
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243 // |
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244 // FILENAME is used for error messages. |
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245 // |
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246 // The data is expected to be in the following format: |
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247 // |
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248 // The input file must have a header followed by some data. |
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249 // |
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250 // All lines in the header must begin with a `#' character. |
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251 // |
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252 // The header must contain a list of keyword and value pairs with the |
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253 // keyword and value separated by a colon. |
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254 // |
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255 // Keywords must appear in the following order: |
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256 // |
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257 // # name: <name> |
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258 // # type: <type> |
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259 // # <info> |
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260 // |
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261 // Where, for the built in types are: |
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262 // |
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263 // <name> : a valid identifier |
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264 // |
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265 // <type> : <typename> |
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266 // | global <typename> |
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267 // |
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268 // <typename> : scalar |
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269 // | complex scalar |
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270 // | matrix |
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271 // | complex matrix |
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272 // | bool |
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273 // | bool matrix |
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274 // | string |
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275 // | range |
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276 // |
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277 // <info> : <matrix info> |
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278 // | <string info> |
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279 // |
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280 // <matrix info> : # rows: <integer> |
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281 // : # columns: <integer> |
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282 // |
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283 // <string info> : # elements: <integer> |
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284 // : # length: <integer> (once before each string) |
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285 // |
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286 // For backward compatibility the type "string array" is treated as a |
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287 // "string" type. Also "string" can have a single element with no elements |
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288 // line such that |
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289 // |
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290 // <string info> : # length: <integer> |
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291 // |
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292 // Formatted ASCII data follows the header. |
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293 // |
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294 // Example: |
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295 // |
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296 // # name: foo |
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297 // # type: matrix |
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298 // # rows: 2 |
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299 // # columns: 2 |
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300 // 2 4 |
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301 // 1 3 |
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302 // |
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303 // Example: |
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304 // |
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305 // # name: foo |
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306 // # type: string |
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307 // # elements: 5 |
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308 // # length: 4 |
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309 // this |
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310 // # length: 2 |
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311 // is |
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312 // # length: 1 |
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313 // a |
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314 // # length: 6 |
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315 // string |
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316 // # length: 5 |
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317 // array |
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318 // |
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319 // XXX FIXME XXX -- this format is fairly rigid, and doesn't allow for |
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320 // arbitrary comments. Someone should fix that. It does allow arbitrary |
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321 // types however. |
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322 |
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323 // Ugh. The signature of the compare method is not standard in older |
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324 // versions of the GNU libstdc++. Do this instead: |
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325 |
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326 #define SUBSTRING_COMPARE_EQ(s, pos, n, t) (s.substr (pos, n) == t) |
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327 |
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328 std::string |
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329 read_ascii_data (std::istream& is, const std::string& filename, bool& global, |
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330 octave_value& tc, int count) |
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331 { |
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332 // Read name for this entry or break on EOF. |
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333 |
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334 std::string name = extract_keyword (is, "name"); |
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335 |
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336 if (name.empty ()) |
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337 { |
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338 if (count == 0) |
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339 error ("load: empty name keyword or no data found in file `%s'", |
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340 filename.c_str ()); |
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341 |
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342 return std::string (); |
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343 } |
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344 |
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345 if (name == CELL_ELT_TAG) |
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346 { |
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347 // This is OK -- name won't be used. |
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348 } |
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349 else if (! valid_identifier (name)) |
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350 { |
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351 error ("load: bogus identifier `%s' found in file `%s'", |
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352 name.c_str (), filename.c_str ()); |
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353 return std::string (); |
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354 } |
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355 |
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356 // Look for type keyword. |
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357 |
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358 std::string tag = extract_keyword (is, "type"); |
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359 |
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360 if (! tag.empty ()) |
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361 { |
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362 std::string typ; |
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363 size_t pos = tag.rfind (' '); |
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364 |
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365 if (pos != NPOS) |
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366 { |
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367 global = SUBSTRING_COMPARE_EQ (tag, 0, 6, "global"); |
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368 |
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369 typ = global ? tag.substr (7) : tag; |
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370 } |
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371 else |
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372 typ = tag; |
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373 |
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4687
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374 // Special case for backward compatiablity. A small bit of cruft |
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375 if (SUBSTRING_COMPARE_EQ (typ, 0, 12, "string array")) |
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376 tc = octave_value (charMatrix (), true); |
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377 else |
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378 tc = octave_value_typeinfo::lookup_type (typ); |
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379 |
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380 tc.load_ascii (is); |
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381 } |
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382 else |
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383 error ("load: failed to extract keyword specifying value type"); |
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384 |
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385 if (error_state) |
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386 { |
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387 error ("load: reading file %s", filename.c_str ()); |
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388 return std::string (); |
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389 } |
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390 |
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391 return name; |
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392 } |
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393 |
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394 // Save the data from TC along with the corresponding NAME, and global |
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395 // flag MARK_AS_GLOBAL on stream OS in the plain text format described |
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396 // above for load_ascii_data. If NAME is empty, the name: line is not |
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397 // generated. PRECISION specifies the number of decimal digits to print. |
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398 // If STRIP_NAN_AND_INF is TRUE, rows containing NaNs are deleted, |
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399 // and Infinite values are converted to +/-OCT_RBV (A Real Big Value, |
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400 // but not so big that gnuplot can't handle it when trying to compute |
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401 // axis ranges, etc.). |
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402 // |
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403 // Assumes ranges and strings cannot contain Inf or NaN values. |
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404 // |
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405 // Returns 1 for success and 0 for failure. |
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406 |
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407 // XXX FIXME XXX -- should probably write the help string here too. |
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408 |
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409 bool |
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410 save_ascii_data (std::ostream& os, const octave_value& val_arg, |
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411 const std::string& name, bool& infnan_warned, |
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412 bool strip_nan_and_inf, bool mark_as_global, |
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413 int precision) |
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414 { |
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415 bool success = true; |
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416 |
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417 if (! precision) |
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418 precision = Vsave_precision; |
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419 |
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420 if (! name.empty ()) |
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421 os << "# name: " << name << "\n"; |
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422 |
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423 long old_precision = os.precision (); |
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424 os.precision (precision); |
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425 |
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426 octave_value val = val_arg; |
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427 |
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428 if (mark_as_global) |
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429 os << "# type: global " << val.type_name () << "\n"; |
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430 else |
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431 os << "# type: " << val.type_name() << "\n"; |
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432 |
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433 success = val . save_ascii(os, infnan_warned, strip_nan_and_inf); |
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434 |
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435 os.precision (old_precision); |
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436 |
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437 return (os && success); |
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438 } |
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439 |
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440 bool |
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441 save_ascii_data_for_plotting (std::ostream& os, const octave_value& t, |
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442 const std::string& name) |
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443 { |
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444 bool infnan_warned = true; |
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445 |
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446 return save_ascii_data (os, t, name, infnan_warned, true, false, 0); |
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447 } |
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448 |
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449 // Maybe this should be a static function in tree-plot.cc? |
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450 |
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451 // If TC is matrix, save it on stream OS in a format useful for |
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452 // making a 3-dimensional plot with gnuplot. If PARAMETRIC is |
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453 // TRUE, assume a parametric 3-dimensional plot will be generated. |
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454 |
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455 bool |
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456 save_three_d (std::ostream& os, const octave_value& tc, bool parametric) |
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457 { |
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458 bool fail = false; |
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459 |
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460 int nr = tc.rows (); |
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461 int nc = tc.columns (); |
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462 |
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463 if (tc.is_real_matrix ()) |
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464 { |
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465 os << "# 3D data...\n" |
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466 << "# type: matrix\n" |
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467 << "# total rows: " << nr << "\n" |
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468 << "# total columns: " << nc << "\n"; |
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469 |
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470 if (parametric) |
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471 { |
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472 int extras = nc % 3; |
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473 if (extras) |
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474 warning ("ignoring last %d columns", extras); |
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475 |
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476 Matrix tmp = tc.matrix_value (); |
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477 tmp = strip_infnan (tmp); |
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478 nr = tmp.rows (); |
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479 |
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480 for (int i = 0; i < nc-extras; i += 3) |
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481 { |
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482 os << tmp.extract (0, i, nr-1, i+2); |
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483 if (i+3 < nc-extras) |
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484 os << "\n"; |
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485 } |
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486 } |
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487 else |
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488 { |
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489 Matrix tmp = tc.matrix_value (); |
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490 tmp = strip_infnan (tmp); |
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491 nr = tmp.rows (); |
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492 |
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493 for (int i = 0; i < nc; i++) |
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494 { |
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495 os << tmp.extract (0, i, nr-1, i); |
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496 if (i+1 < nc) |
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497 os << "\n"; |
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498 } |
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499 } |
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500 } |
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501 else |
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502 { |
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503 ::error ("for now, I can only save real matrices in 3D format"); |
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504 fail = true; |
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505 } |
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506 |
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507 return (os && ! fail); |
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508 } |
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509 |
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510 static int |
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511 save_precision (void) |
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512 { |
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513 double val; |
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514 if (builtin_real_scalar_variable ("save_precision", val) |
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515 && ! xisnan (val)) |
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516 { |
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517 int ival = NINT (val); |
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518 if (ival >= 0 && ival == val) |
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519 { |
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520 Vsave_precision = ival; |
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521 return 0; |
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522 } |
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523 } |
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524 gripe_invalid_value_specified ("save_precision"); |
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525 return -1; |
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526 } |
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527 |
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528 void |
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529 symbols_of_ls_oct_ascii (void) |
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|
530 { |
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531 DEFVAR (save_precision, 15.0, save_precision, |
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532 "-*- texinfo -*-\n\ |
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533 @defvr {Built-in Variable} save_precision\n\ |
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534 This variable specifies the number of digits to keep when saving data in\n\ |
|
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535 text format. The default value is 17.\n\ |
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536 @end defvr"); |
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|
537 } |
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538 |
|
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539 /* |
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540 ;;; Local Variables: *** |
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541 ;;; mode: C++ *** |
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542 ;;; End: *** |
|
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543 */ |
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544 |
