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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 #include <vector> |
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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-utils.h" |
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68 #include "ls-oct-binary.h" |
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69 |
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70 // Extract one value (scalar, matrix, string, etc.) from stream IS and |
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71 // place it in TC, returning the name of the variable. If the value |
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72 // is tagged as global in the file, return TRUE in GLOBAL. If SWAP |
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73 // is TRUE, swap bytes after reading. |
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74 // |
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75 // The data is expected to be in the following format: |
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76 // |
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77 // Header (one per file): |
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78 // ===================== |
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79 // |
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80 // object type bytes |
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81 // ------ ---- ----- |
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82 // magic number string 10 |
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83 // |
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84 // float format integer 1 |
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85 // |
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86 // |
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87 // Data (one set for each item): |
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88 // ============================ |
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89 // |
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90 // object type bytes |
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91 // ------ ---- ----- |
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92 // name_length integer 4 |
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93 // |
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94 // name string name_length |
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95 // |
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96 // doc_length integer 4 |
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97 // |
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98 // doc string doc_length |
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99 // |
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100 // global flag integer 1 |
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101 // |
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102 // data type char 1 |
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103 // |
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104 // In general "data type" is 255, and in that case the next arguments |
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105 // in the data set are |
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106 // |
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107 // object type bytes |
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108 // ------ ---- ----- |
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109 // type_length integer 4 |
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110 // |
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111 // type string type_length |
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112 // |
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113 // The string "type" is then used with octave_value_typeinfo::lookup_type |
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114 // to create an octave_value of the correct type. The specific load/save |
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115 // function is then called. |
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116 // |
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117 // For backward compatiablity "data type" can also be a value between 1 |
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118 // and 7, where this defines a hardcoded octave_value of the type |
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119 // |
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120 // data type octave_value |
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121 // --------- ------------ |
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122 // 1 scalar |
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123 // 2 matrix |
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124 // 3 complex scalar |
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125 // 4 complex matrix |
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126 // 5 string (old style storage) |
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127 // 6 range |
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128 // 7 string |
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129 // |
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130 // Except for "data type" equal 5 that requires special treatment, these |
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131 // old style "data type" value also cause the specific load/save functions |
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132 // to be called. FILENAME is used for error messages. |
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133 |
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134 std::string |
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135 read_binary_data (std::istream& is, bool swap, |
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136 oct_mach_info::float_format fmt, |
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137 const std::string& filename, bool& global, |
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138 octave_value& tc, std::string& doc) |
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139 { |
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140 std::string retval; |
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141 |
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142 char tmp = 0; |
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143 |
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144 FOUR_BYTE_INT name_len = 0; |
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145 FOUR_BYTE_INT doc_len = 0; |
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146 |
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147 doc.resize (0); |
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148 |
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149 // We expect to fail here, at the beginning of a record, so not |
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150 // being able to read another name should not result in an error. |
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151 |
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152 is.read (X_CAST (char *, &name_len), 4); |
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153 if (! is) |
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154 return retval; |
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155 if (swap) |
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156 swap_bytes<4> (&name_len); |
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157 |
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158 { |
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159 OCTAVE_LOCAL_BUFFER (char, name, name_len+1); |
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160 name[name_len] = '\0'; |
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161 if (! is.read (X_CAST (char *, name), name_len)) |
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162 goto data_read_error; |
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163 retval = name; |
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164 } |
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165 |
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166 is.read (X_CAST (char *, &doc_len), 4); |
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167 if (! is) |
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168 goto data_read_error; |
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169 if (swap) |
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170 swap_bytes<4> (&doc_len); |
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171 |
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172 { |
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173 OCTAVE_LOCAL_BUFFER (char, tdoc, doc_len+1); |
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174 tdoc[doc_len] = '\0'; |
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175 if (! is.read (X_CAST (char *, tdoc), doc_len)) |
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176 goto data_read_error; |
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177 doc = tdoc; |
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178 } |
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179 |
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180 if (! is.read (X_CAST (char *, &tmp), 1)) |
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181 goto data_read_error; |
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182 global = tmp ? 1 : 0; |
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183 |
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184 tmp = 0; |
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185 if (! is.read (X_CAST (char *, &tmp), 1)) |
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186 goto data_read_error; |
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187 |
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188 // All cases except 255 kept for backwards compatibility |
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189 switch (tmp) |
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190 { |
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191 case 1: |
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192 tc = octave_value_typeinfo::lookup_type ("scalar"); |
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193 break; |
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194 |
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195 case 2: |
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196 tc = octave_value_typeinfo::lookup_type ("matrix"); |
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197 break; |
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198 |
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199 case 3: |
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200 tc = octave_value_typeinfo::lookup_type ("complex scalar"); |
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201 break; |
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202 |
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203 case 4: |
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204 tc = octave_value_typeinfo::lookup_type ("complex matrix"); |
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205 break; |
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206 |
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207 case 5: |
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208 { |
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209 // XXX FIXME XXXX |
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210 // This is cruft, since its for a save type that is old. Maybe |
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211 // this is taking backward compatability too far!! |
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212 FOUR_BYTE_INT len; |
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213 if (! is.read (X_CAST (char *, &len), 4)) |
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214 goto data_read_error; |
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215 if (swap) |
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216 swap_bytes<4> (&len); |
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217 OCTAVE_LOCAL_BUFFER (char, s, len+1); |
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218 if (! is.read (X_CAST (char *, s), len)) |
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219 goto data_read_error; |
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220 s[len] = '\0'; |
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221 tc = s; |
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222 |
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223 // Early return, since don't want rest of this function |
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224 return retval; |
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225 } |
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226 break; |
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227 |
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228 case 6: |
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229 tc = octave_value_typeinfo::lookup_type ("range"); |
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230 break; |
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231 |
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232 case 7: |
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233 tc = octave_value_typeinfo::lookup_type ("string"); |
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234 break; |
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235 |
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236 case 255: |
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237 { |
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238 // Read the saved variable type |
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239 FOUR_BYTE_INT len; |
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240 if (! is.read (X_CAST (char *, &len), 4)) |
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241 goto data_read_error; |
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242 if (swap) |
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243 swap_bytes<4> (&len); |
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244 OCTAVE_LOCAL_BUFFER (char, s, len+1); |
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245 if (! is.read (X_CAST (char *, s), len)) |
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246 goto data_read_error; |
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247 s[len] = '\0'; |
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248 std::string typ = s; |
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249 tc = octave_value_typeinfo::lookup_type (typ); |
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250 } |
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251 break; |
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252 default: |
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253 goto data_read_error; |
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254 break; |
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255 } |
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256 |
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257 if (!tc.load_binary (is, swap, fmt)) |
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258 { |
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259 data_read_error: |
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260 error ("load: trouble reading binary file `%s'", filename.c_str ()); |
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261 } |
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262 |
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263 return retval; |
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264 } |
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265 |
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266 // Save the data from TC along with the corresponding NAME, help |
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267 // string DOC, and global flag MARK_AS_GLOBAL on stream OS in the |
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268 // binary format described above for read_binary_data. |
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269 |
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270 bool |
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271 save_binary_data (std::ostream& os, const octave_value& tc, |
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272 const std::string& name, const std::string& doc, |
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273 bool mark_as_global, bool save_as_floats) |
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274 { |
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275 FOUR_BYTE_INT name_len = name.length (); |
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276 |
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277 os.write (X_CAST (char *, &name_len), 4); |
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278 os << name; |
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279 |
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280 FOUR_BYTE_INT doc_len = doc.length (); |
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281 |
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282 os.write (X_CAST (char *, &doc_len), 4); |
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283 os << doc; |
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284 |
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285 unsigned char tmp; |
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286 |
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287 tmp = mark_as_global; |
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288 os.write (X_CAST (char *, &tmp), 1); |
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289 |
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290 // 255 flags the new binary format |
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291 tmp = 255; |
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292 os.write (X_CAST (char *, &tmp), 1); |
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293 |
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294 // Write the string corresponding to the octave_value type |
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295 std::string typ = tc.type_name (); |
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296 FOUR_BYTE_INT len = typ.length (); |
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297 os.write (X_CAST (char *, &len), 4); |
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298 const char *btmp = typ.data (); |
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299 os.write (X_CAST (char *, btmp), len); |
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300 |
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301 // The octave_value of tc is const. Make a copy... |
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302 octave_value val = tc; |
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303 |
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304 // Call specific save function |
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305 bool success = val.save_binary (os, save_as_floats); |
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306 |
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307 return (os && success); |
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308 } |
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309 |
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310 /* |
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311 ;;; Local Variables: *** |
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312 ;;; mode: C++ *** |
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313 ;;; End: *** |
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314 */ |
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315 |
