[1] | 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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