1 | |
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2 | #include "cmt_model.h" |
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3 | #include "cmt_fragment.h" |
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4 | #include "cmt_symbol.h" |
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5 | |
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6 | /** |
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7 | * Filters out all predefined XML constructs. |
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8 | */ |
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9 | void CmtModel::filter (cmt_string& text) |
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10 | { |
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11 | text.replace_all ("<cmt:tab/>", "\t"); |
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12 | text.replace_all ("<cmt:cr/>", "\r"); |
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13 | text.replace_all ("<cmt:lf/>", "\n"); |
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14 | } |
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15 | |
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16 | void CmtModel::display (cmt_string& text) |
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17 | { |
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18 | text.replace_all ("<", "<"); |
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19 | text.replace_all (">", ">"); |
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20 | Symbol::expand (text); |
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21 | cout << text; |
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22 | } |
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23 | |
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24 | void CmtModel::expand (const cmt_string& input_text) |
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25 | { |
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26 | int openmarker; |
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27 | int closemarker; |
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28 | |
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29 | CmtSystem::cmt_string_vector subargs; |
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30 | |
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31 | cmt_string text = input_text; |
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32 | cmt_string remaining; |
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33 | |
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34 | filter (text); |
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35 | |
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36 | for (;;) |
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37 | { |
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38 | /** |
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39 | * Look for the next < ... /> pattern |
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40 | * If not found, then simply dump the text as it is. |
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41 | */ |
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42 | |
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43 | openmarker = text.find ("<"); |
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44 | if (openmarker == cmt_string::npos) break; |
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45 | |
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46 | closemarker = text.find (openmarker, "/>"); |
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47 | if (closemarker == cmt_string::npos) break; |
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48 | |
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49 | if (CmtSystem::testenv ("CMTTESTMODEL")) |
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50 | { |
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51 | cerr << "text=[" << text << "]" << endl; |
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52 | } |
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53 | |
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54 | |
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55 | /** |
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56 | * Extract the command from the pattern |
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57 | */ |
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58 | cmt_string command; |
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59 | text.substr (openmarker + 1, closemarker - openmarker - 1, command); |
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60 | |
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61 | if (CmtSystem::testenv ("CMTTESTMODEL")) |
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62 | { |
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63 | cerr << "command=[" << command << "]" << endl; |
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64 | } |
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65 | |
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66 | /** |
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67 | * Get what is left from the original text beyond the pattern |
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68 | */ |
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69 | text.substr (closemarker + 2, remaining); |
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70 | |
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71 | /** |
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72 | * Cut the original text up to the pattern start |
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73 | */ |
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74 | text.erase (openmarker); |
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75 | |
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76 | /** |
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77 | * Now display it |
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78 | */ |
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79 | display (text); |
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80 | |
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81 | /** |
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82 | * Convert the extracted command into words |
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83 | */ |
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84 | CmtSystem::split (command, " ", subargs); |
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85 | |
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86 | /** |
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87 | * Recursively expand it |
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88 | */ |
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89 | expand (subargs); |
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90 | |
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91 | /** |
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92 | * The next iteration will operate on the remaining text |
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93 | */ |
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94 | text = remaining; |
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95 | } |
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96 | |
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97 | if (CmtSystem::testenv ("CMTTESTMODEL")) |
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98 | { |
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99 | cerr << "text=[" << text << "]" << endl; |
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100 | } |
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101 | |
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102 | /** |
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103 | * Display what is left after extracting the last pattern |
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104 | */ |
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105 | display (text); |
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106 | cout << endl; |
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107 | } |
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108 | |
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109 | /** |
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110 | * Expands a model file |
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111 | * Arguments are : |
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112 | * model-name : name of a model file |
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113 | * var=value : variable value to be expanded |
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114 | * (will take the form ${var} ) |
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115 | */ |
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116 | void CmtModel::expand (const CmtSystem::cmt_string_vector& arguments) |
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117 | { |
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118 | int i; |
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119 | |
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120 | Variable::VariableVector variables; |
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121 | |
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122 | /** |
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123 | * We start by decoding all [variable=value] pairs from the arguments |
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124 | * A vector of Variables is filled from them. |
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125 | */ |
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126 | for (i = 0; i < arguments.size (); i++) |
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127 | { |
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128 | const cmt_string& arg = arguments[i]; |
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129 | |
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130 | if (arg.find ("=") != cmt_string::npos) |
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131 | { |
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132 | cmt_string name; |
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133 | cmt_string value; |
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134 | int pos = arg.find ("="); |
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135 | |
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136 | arg.substr (0, pos, name); |
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137 | arg.substr (pos + 1, value); |
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138 | |
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139 | Variable* v = Variable::find (variables, name); |
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140 | if (v == 0) |
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141 | { |
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142 | v = &(variables.add ()); |
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143 | v->set (name); |
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144 | } |
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145 | |
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146 | (*v) = value; |
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147 | } |
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148 | } |
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149 | |
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150 | /** |
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151 | * Then model names are extracted. |
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152 | * Each model may contain a set of <...> patterns. |
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153 | * The expected syntax for each of them is : |
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154 | * <model-name variable-name=value ...> |
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155 | * |
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156 | * Therefore the current expand function is recursively restarted. |
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157 | * |
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158 | * Text around patterns is displayed after replacements of all |
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159 | * variable values detected by ${variable-name} patterns |
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160 | */ |
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161 | cmt_string text; |
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162 | |
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163 | for (i = 0; i < arguments.size (); i++) |
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164 | { |
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165 | const cmt_string& arg = arguments[i]; |
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166 | |
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167 | if (arg.find ("=") == cmt_string::npos) |
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168 | { |
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169 | FragmentHandle fragment (arg); |
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170 | fragment.copy (text, variables, 0); |
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171 | |
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172 | filter (text); |
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173 | |
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174 | int openmarker; |
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175 | int closemarker; |
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176 | |
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177 | CmtSystem::cmt_string_vector subargs; |
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178 | |
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179 | cmt_string remaining; |
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180 | |
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181 | for (;;) |
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182 | { |
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183 | /** |
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184 | * Look for the next <...> pattern |
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185 | * If not found, then simply dump the text as it is. |
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186 | */ |
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187 | |
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188 | openmarker = text.find ("<"); |
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189 | if (openmarker == cmt_string::npos) break; |
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190 | |
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191 | closemarker = text.find (openmarker, "/>"); |
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192 | if (closemarker == cmt_string::npos) |
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193 | { |
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194 | /** |
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195 | * The opening < was in the text |
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196 | */ |
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197 | |
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198 | /** |
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199 | * Get what is left from the original text beyond the pattern |
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200 | */ |
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201 | text.substr (openmarker + 1, remaining); |
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202 | text.erase (openmarker + 1); |
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203 | |
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204 | /** |
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205 | * Now display it |
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206 | */ |
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207 | display (text); |
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208 | } |
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209 | else |
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210 | { |
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211 | /** |
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212 | * Extract the command from the pattern |
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213 | */ |
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214 | cmt_string command; |
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215 | text.substr (openmarker + 1, closemarker - openmarker - 1, command); |
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216 | |
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217 | /** |
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218 | * Get what is left from the original text beyond the pattern |
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219 | */ |
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220 | text.substr (closemarker + 2, remaining); |
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221 | text.erase (openmarker); |
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222 | |
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223 | /** |
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224 | * Now display it |
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225 | */ |
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226 | display (text); |
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227 | |
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228 | /** |
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229 | * Convert the extracted command into words |
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230 | */ |
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231 | CmtSystem::split (command, " ", subargs); |
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232 | |
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233 | /** |
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234 | * Recursively expand it |
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235 | */ |
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236 | expand (subargs); |
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237 | } |
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238 | |
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239 | /** |
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240 | * The next iteration will operate on the remaining text |
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241 | */ |
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242 | text = remaining; |
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243 | } |
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244 | |
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245 | /** |
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246 | * Display what is left after extracting the last pattern |
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247 | */ |
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248 | display (text); |
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249 | } |
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250 | } |
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251 | } |
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252 | |
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