1 | %{ |
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2 | #include "filter_expr_node.hpp" |
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3 | #include <string> |
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4 | #include <iostream> |
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5 | #include "exception.hpp" |
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6 | |
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7 | using namespace std; |
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8 | using namespace xios; |
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9 | |
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10 | extern "C" |
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11 | { |
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12 | int yyparse(void); |
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13 | int yylex(void); |
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14 | int yyerror(const char *s); |
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15 | } |
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16 | |
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17 | static IFilterExprNode* parsed; |
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18 | static std::string globalInputText; |
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19 | static std::string *globalInputText_ptr = 0; |
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20 | static size_t globalReadOffset = 0; |
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21 | #pragma omp threadprivate(parsed, globalInputText_ptr, globalReadOffset) |
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22 | |
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23 | int readInputForLexer(char* buffer, size_t* numBytesRead, size_t maxBytesToRead) |
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24 | { |
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25 | if(globalInputText_ptr == 0) globalInputText_ptr = new std::string; |
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26 | size_t numBytesToRead = maxBytesToRead; |
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27 | size_t bytesRemaining = (*globalInputText_ptr).length()-globalReadOffset; |
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28 | size_t i; |
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29 | if (numBytesToRead > bytesRemaining) numBytesToRead = bytesRemaining; |
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30 | for (i = 0; i < numBytesToRead; i++) buffer[i] = (*globalInputText_ptr).c_str()[globalReadOffset + i]; |
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31 | *numBytesRead = numBytesToRead; |
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32 | globalReadOffset += numBytesToRead; |
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33 | return 0; |
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34 | } |
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35 | %} |
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36 | |
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37 | %union |
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38 | { |
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39 | std::string* str; /* symbol table index */ |
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40 | xios::IScalarExprNode* scalarNode; |
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41 | xios::IFilterExprNode* filterNode; |
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42 | }; |
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43 | |
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44 | %token <str> NUMBER |
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45 | %token <str> VAR ID AVERAGE |
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46 | %token PLUS MINUS TIMES DIVIDE POWER |
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47 | %token EQ LT GT LE GE NE |
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48 | %token LEFT_PARENTHESIS RIGHT_PARENTHESIS |
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49 | %token QUESTION_MARK COLON |
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50 | %token <str> END |
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51 | |
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52 | %nonassoc QUESTION_MARK COLON |
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53 | %left EQ LT GT LE GE NE |
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54 | %left PLUS MINUS |
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55 | %left TIMES DIVIDE |
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56 | %nonassoc NEG |
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57 | %right POWER |
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58 | |
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59 | %type <scalarNode> Expression |
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60 | %type <filterNode> Line Field_expr |
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61 | %start Line |
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62 | %% |
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63 | |
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64 | |
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65 | Line: |
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66 | END { /* Nothing to do */ } |
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67 | | Field_expr END { parsed = $1; } |
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68 | ; |
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69 | |
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70 | Expression: |
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71 | NUMBER { $$ = new CScalarValExprNode(*$1); delete $1; } |
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72 | | VAR { $$ = new CScalarVarExprNode(*$1); delete $1; } |
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73 | | Expression PLUS Expression { $$ = new CScalarBinaryOpExprNode($1, "add", $3); } |
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74 | | Expression MINUS Expression { $$ = new CScalarBinaryOpExprNode($1, "minus", $3); } |
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75 | | Expression TIMES Expression { $$ = new CScalarBinaryOpExprNode($1, "mult", $3); } |
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76 | | Expression DIVIDE Expression { $$ = new CScalarBinaryOpExprNode($1, "div", $3); } |
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77 | | MINUS Expression %prec NEG { $$ = new CScalarUnaryOpExprNode("neg", $2); } |
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78 | | Expression POWER Expression { $$ = new CScalarBinaryOpExprNode($1, "pow", $3); } |
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79 | | Expression EQ Expression { $$ = new CScalarBinaryOpExprNode($1, "eq", $3); } |
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80 | | Expression LT Expression { $$ = new CScalarBinaryOpExprNode($1, "lt", $3); } |
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81 | | Expression GT Expression { $$ = new CScalarBinaryOpExprNode($1, "gt", $3); } |
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82 | | Expression LE Expression { $$ = new CScalarBinaryOpExprNode($1, "le", $3); } |
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83 | | Expression GE Expression { $$ = new CScalarBinaryOpExprNode($1, "ge", $3); } |
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84 | | Expression NE Expression { $$ = new CScalarBinaryOpExprNode($1, "ne", $3); } |
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85 | | Expression QUESTION_MARK Expression COLON Expression {$$ = new CScalarTernaryOpExprNode($1, "cond", $3, $5);} |
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86 | | LEFT_PARENTHESIS Expression RIGHT_PARENTHESIS { $$ = $2; } |
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87 | | ID LEFT_PARENTHESIS Expression RIGHT_PARENTHESIS { $$ = new CScalarUnaryOpExprNode(*$1, $3); delete $1; } |
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88 | ; |
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89 | |
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90 | Field_expr: |
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91 | ID { $$ = new CFilterFieldExprNode(*$1); delete $1; } |
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92 | | AVERAGE { $$ = new CFilterTemporalFieldExprNode(*$1); delete $1; } |
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93 | | Field_expr PLUS Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "add", $3); } |
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94 | | Field_expr MINUS Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "minus", $3); } |
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95 | | Field_expr TIMES Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "mult", $3); } |
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96 | | Field_expr DIVIDE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "div", $3); } |
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97 | | MINUS Field_expr %prec NEG { $$ = new CFilterUnaryOpExprNode("neg", $2); } |
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98 | | Field_expr POWER Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "pow", $3); } |
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99 | | Field_expr EQ Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "eq", $3); } |
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100 | | Field_expr LT Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "lt", $3); } |
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101 | | Field_expr GT Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "gt", $3); } |
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102 | | Field_expr LE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "le", $3); } |
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103 | | Field_expr GE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "ge", $3); } |
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104 | | Field_expr NE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "ne", $3); } |
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105 | | LEFT_PARENTHESIS Field_expr RIGHT_PARENTHESIS { $$ = $2; } |
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106 | | Expression QUESTION_MARK Expression COLON Field_expr {$$ = new CFilterScalarScalarFieldOpExprNode($1, "cond",$3, $5);} |
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107 | | Expression QUESTION_MARK Field_expr COLON Expression {$$ = new CFilterScalarFieldScalarOpExprNode($1, "cond",$3, $5);} |
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108 | | Expression QUESTION_MARK Field_expr COLON Field_expr {$$ = new CFilterScalarFieldFieldOpExprNode($1, "cond",$3, $5);} |
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109 | | Field_expr QUESTION_MARK Expression COLON Expression {$$ = new CFilterFieldScalarScalarOpExprNode($1, "cond",$3, $5);} |
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110 | | Field_expr QUESTION_MARK Expression COLON Field_expr {$$ = new CFilterFieldScalarFieldOpExprNode($1, "cond",$3, $5);} |
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111 | | Field_expr QUESTION_MARK Field_expr COLON Expression {$$ = new CFilterFieldFieldScalarOpExprNode($1, "cond",$3, $5);} |
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112 | | Field_expr QUESTION_MARK Field_expr COLON Field_expr {$$ = new CFilterFieldFieldFieldOpExprNode($1, "cond",$3, $5);} |
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113 | | Field_expr PLUS Expression { $$ = new CFilterFieldScalarOpExprNode($1, "add", $3); } |
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114 | | Expression PLUS Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "add", $3); } |
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115 | | Field_expr MINUS Expression { $$ = new CFilterFieldScalarOpExprNode($1, "minus", $3); } |
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116 | | Expression MINUS Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "minus", $3); } |
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117 | | Field_expr TIMES Expression { $$ = new CFilterFieldScalarOpExprNode($1, "mult", $3); } |
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118 | | Expression TIMES Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "mult", $3); } |
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119 | | Field_expr DIVIDE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "div", $3); } |
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120 | | Expression DIVIDE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "div", $3); } |
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121 | | Field_expr POWER Expression { $$ = new CFilterFieldScalarOpExprNode($1, "pow", $3); } |
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122 | | Field_expr EQ Expression { $$ = new CFilterFieldScalarOpExprNode($1, "eq", $3); } |
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123 | | Expression EQ Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "eq", $3); } |
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124 | | Field_expr LT Expression { $$ = new CFilterFieldScalarOpExprNode($1, "lt", $3); } |
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125 | | Expression LT Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "lt", $3); } |
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126 | | Field_expr GT Expression { $$ = new CFilterFieldScalarOpExprNode($1, "gt", $3); } |
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127 | | Expression GT Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "gt", $3); } |
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128 | | Field_expr LE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "le", $3); } |
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129 | | Expression LE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "le", $3); } |
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130 | | Field_expr GE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "ge", $3); } |
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131 | | Expression GE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "ge", $3); } |
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132 | | Field_expr NE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "ne", $3); } |
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133 | | Expression NE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "ne", $3); } |
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134 | | ID LEFT_PARENTHESIS Field_expr RIGHT_PARENTHESIS { $$ = new CFilterUnaryOpExprNode(*$1, $3); delete $1; } |
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135 | ; |
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136 | %% |
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137 | |
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138 | extern "C" |
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139 | { |
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140 | int yyerror(const char *s) |
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141 | { |
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142 | ERROR("int yyerror(const char *s)", << "Parsing error: " << s << endl); |
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143 | } |
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144 | } |
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145 | |
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146 | namespace xios |
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147 | { |
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148 | IFilterExprNode* parseExpr(const string& strExpr) |
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149 | { |
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150 | #pragma omp critical (_parser) |
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151 | { |
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152 | if(globalInputText_ptr == 0) globalInputText_ptr = new std::string; |
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153 | (*globalInputText_ptr).assign (strExpr); |
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154 | globalReadOffset = 0; |
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155 | yyparse(); |
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156 | } |
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157 | return parsed; |
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158 | } |
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159 | } |
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160 | |
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161 | |
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