[458] | 1 | %{ |
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[642] | 2 | #include "filter_expr_node.hpp" |
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[458] | 3 | #include <string> |
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| 4 | #include <iostream> |
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[493] | 5 | #include "exception.hpp" |
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| 6 | |
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[642] | 7 | using namespace std; |
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| 8 | using namespace xios; |
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[493] | 9 | |
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[458] | 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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[642] | 14 | int yyerror(const char *s); |
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[458] | 15 | } |
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| 16 | |
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[642] | 17 | IFilterExprNode* parsed; |
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| 18 | std::string globalInputText; |
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| 19 | size_t globalReadOffset = 0; |
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| 20 | |
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| 21 | int readInputForLexer(char* buffer, size_t* numBytesRead, size_t maxBytesToRead) |
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| 22 | { |
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| 23 | size_t numBytesToRead = maxBytesToRead; |
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| 24 | size_t bytesRemaining = globalInputText.length()-globalReadOffset; |
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| 25 | size_t i; |
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| 26 | if (numBytesToRead > bytesRemaining) numBytesToRead = bytesRemaining; |
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| 27 | for (i = 0; i < numBytesToRead; i++) buffer[i] = globalInputText.c_str()[globalReadOffset + i]; |
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[458] | 28 | *numBytesRead = numBytesToRead; |
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| 29 | globalReadOffset += numBytesToRead; |
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| 30 | return 0; |
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[642] | 31 | } |
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[458] | 32 | %} |
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| 33 | |
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| 34 | %union |
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| 35 | { |
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[642] | 36 | std::string* str; /* symbol table index */ |
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| 37 | xios::IScalarExprNode* scalarNode; |
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| 38 | xios::IFilterExprNode* filterNode; |
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[458] | 39 | }; |
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| 40 | |
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| 41 | %token <str> NUMBER |
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[642] | 42 | %token <str> VAR ID AVERAGE |
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[458] | 43 | %token PLUS MINUS TIMES DIVIDE POWER |
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[1158] | 44 | %token EQ LT GT LE GE NE |
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[458] | 45 | %token LEFT_PARENTHESIS RIGHT_PARENTHESIS |
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[1158] | 46 | %token QUESTION_MARK COLON |
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[458] | 47 | %token <str> END |
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| 48 | |
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[1158] | 49 | %nonassoc QUESTION_MARK COLON |
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| 50 | %left EQ LT GT LE GE NE |
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[458] | 51 | %left PLUS MINUS |
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| 52 | %left TIMES DIVIDE |
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| 53 | %nonassoc NEG |
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| 54 | %right POWER |
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| 55 | |
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[642] | 56 | %type <scalarNode> Expression |
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| 57 | %type <filterNode> Line Field_expr |
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[458] | 58 | %start Line |
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| 59 | %% |
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| 60 | |
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| 61 | |
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| 62 | Line: |
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[642] | 63 | END { /* Nothing to do */ } |
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| 64 | | Field_expr END { parsed = $1; } |
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| 65 | ; |
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[458] | 66 | |
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| 67 | Expression: |
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[642] | 68 | NUMBER { $$ = new CScalarValExprNode(*$1); delete $1; } |
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| 69 | | VAR { $$ = new CScalarVarExprNode(*$1); delete $1; } |
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| 70 | | Expression PLUS Expression { $$ = new CScalarBinaryOpExprNode($1, "add", $3); } |
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| 71 | | Expression MINUS Expression { $$ = new CScalarBinaryOpExprNode($1, "minus", $3); } |
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| 72 | | Expression TIMES Expression { $$ = new CScalarBinaryOpExprNode($1, "mult", $3); } |
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| 73 | | Expression DIVIDE Expression { $$ = new CScalarBinaryOpExprNode($1, "div", $3); } |
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| 74 | | MINUS Expression %prec NEG { $$ = new CScalarUnaryOpExprNode("neg", $2); } |
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| 75 | | Expression POWER Expression { $$ = new CScalarBinaryOpExprNode($1, "pow", $3); } |
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[728] | 76 | | Expression EQ Expression { $$ = new CScalarBinaryOpExprNode($1, "eq", $3); } |
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| 77 | | Expression LT Expression { $$ = new CScalarBinaryOpExprNode($1, "lt", $3); } |
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| 78 | | Expression GT Expression { $$ = new CScalarBinaryOpExprNode($1, "gt", $3); } |
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| 79 | | Expression LE Expression { $$ = new CScalarBinaryOpExprNode($1, "le", $3); } |
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| 80 | | Expression GE Expression { $$ = new CScalarBinaryOpExprNode($1, "ge", $3); } |
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[1158] | 81 | | Expression NE Expression { $$ = new CScalarBinaryOpExprNode($1, "ne", $3); } |
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| 82 | | Expression QUESTION_MARK Expression COLON Expression {$$ = new CScalarTernaryOpExprNode($1, "cond", $3, $5);} |
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[642] | 83 | | LEFT_PARENTHESIS Expression RIGHT_PARENTHESIS { $$ = $2; } |
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| 84 | | ID LEFT_PARENTHESIS Expression RIGHT_PARENTHESIS { $$ = new CScalarUnaryOpExprNode(*$1, $3); delete $1; } |
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[458] | 85 | ; |
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| 86 | |
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| 87 | Field_expr: |
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[642] | 88 | ID { $$ = new CFilterFieldExprNode(*$1); delete $1; } |
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[643] | 89 | | AVERAGE { $$ = new CFilterTemporalFieldExprNode(*$1); delete $1; } |
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[642] | 90 | | Field_expr PLUS Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "add", $3); } |
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| 91 | | Field_expr MINUS Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "minus", $3); } |
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| 92 | | Field_expr TIMES Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "mult", $3); } |
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| 93 | | Field_expr DIVIDE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "div", $3); } |
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| 94 | | MINUS Field_expr %prec NEG { $$ = new CFilterUnaryOpExprNode("neg", $2); } |
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| 95 | | Field_expr POWER Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "pow", $3); } |
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[728] | 96 | | Field_expr EQ Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "eq", $3); } |
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| 97 | | Field_expr LT Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "lt", $3); } |
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| 98 | | Field_expr GT Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "gt", $3); } |
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| 99 | | Field_expr LE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "le", $3); } |
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| 100 | | Field_expr GE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "ge", $3); } |
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[1158] | 101 | | Field_expr NE Field_expr { $$ = new CFilterFieldFieldOpExprNode($1, "ne", $3); } |
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[642] | 102 | | LEFT_PARENTHESIS Field_expr RIGHT_PARENTHESIS { $$ = $2; } |
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[1158] | 103 | | Expression QUESTION_MARK Expression COLON Field_expr {$$ = new CFilterScalarScalarFieldOpExprNode($1, "cond",$3, $5);} |
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| 104 | | Expression QUESTION_MARK Field_expr COLON Expression {$$ = new CFilterScalarFieldScalarOpExprNode($1, "cond",$3, $5);} |
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| 105 | | Expression QUESTION_MARK Field_expr COLON Field_expr {$$ = new CFilterScalarFieldFieldOpExprNode($1, "cond",$3, $5);} |
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| 106 | | Field_expr QUESTION_MARK Expression COLON Expression {$$ = new CFilterFieldScalarScalarOpExprNode($1, "cond",$3, $5);} |
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| 107 | | Field_expr QUESTION_MARK Expression COLON Field_expr {$$ = new CFilterFieldScalarFieldOpExprNode($1, "cond",$3, $5);} |
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| 108 | | Field_expr QUESTION_MARK Field_expr COLON Expression {$$ = new CFilterFieldFieldScalarOpExprNode($1, "cond",$3, $5);} |
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| 109 | | Field_expr QUESTION_MARK Field_expr COLON Field_expr {$$ = new CFilterFieldFieldFieldOpExprNode($1, "cond",$3, $5);} |
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[642] | 110 | | Field_expr PLUS Expression { $$ = new CFilterFieldScalarOpExprNode($1, "add", $3); } |
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| 111 | | Expression PLUS Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "add", $3); } |
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| 112 | | Field_expr MINUS Expression { $$ = new CFilterFieldScalarOpExprNode($1, "minus", $3); } |
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| 113 | | Expression MINUS Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "minus", $3); } |
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| 114 | | Field_expr TIMES Expression { $$ = new CFilterFieldScalarOpExprNode($1, "mult", $3); } |
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| 115 | | Expression TIMES Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "mult", $3); } |
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| 116 | | Field_expr DIVIDE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "div", $3); } |
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| 117 | | Expression DIVIDE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "div", $3); } |
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| 118 | | Field_expr POWER Expression { $$ = new CFilterFieldScalarOpExprNode($1, "pow", $3); } |
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[728] | 119 | | Field_expr EQ Expression { $$ = new CFilterFieldScalarOpExprNode($1, "eq", $3); } |
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| 120 | | Expression EQ Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "eq", $3); } |
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| 121 | | Field_expr LT Expression { $$ = new CFilterFieldScalarOpExprNode($1, "lt", $3); } |
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| 122 | | Expression LT Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "lt", $3); } |
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| 123 | | Field_expr GT Expression { $$ = new CFilterFieldScalarOpExprNode($1, "gt", $3); } |
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| 124 | | Expression GT Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "gt", $3); } |
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| 125 | | Field_expr LE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "le", $3); } |
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| 126 | | Expression LE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "le", $3); } |
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| 127 | | Field_expr GE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "ge", $3); } |
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| 128 | | Expression GE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "ge", $3); } |
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[1158] | 129 | | Field_expr NE Expression { $$ = new CFilterFieldScalarOpExprNode($1, "ne", $3); } |
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| 130 | | Expression NE Field_expr { $$ = new CFilterScalarFieldOpExprNode($1, "ne", $3); } |
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[642] | 131 | | ID LEFT_PARENTHESIS Field_expr RIGHT_PARENTHESIS { $$ = new CFilterUnaryOpExprNode(*$1, $3); delete $1; } |
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[458] | 132 | ; |
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| 133 | %% |
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| 134 | |
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| 135 | extern "C" |
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| 136 | { |
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[642] | 137 | int yyerror(const char *s) |
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[458] | 138 | { |
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[642] | 139 | ERROR("int yyerror(const char *s)", << "Parsing error: " << s << endl); |
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[458] | 140 | } |
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| 141 | } |
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| 142 | |
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| 143 | namespace xios |
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| 144 | { |
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[642] | 145 | IFilterExprNode* parseExpr(const string& strExpr) |
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[458] | 146 | { |
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[642] | 147 | globalInputText = strExpr; |
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| 148 | globalReadOffset = 0; |
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[458] | 149 | yyparse(); |
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[642] | 150 | return parsed; |
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[458] | 151 | } |
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| 152 | } |
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| 153 | |
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| 154 | |
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