version 1.1.2.5, 2001/12/02 20:36:49
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version 1.1.2.8, 2001/12/09 02:57:09
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#include <Pegasus/Common/Config.h> | #include <Pegasus/Common/Config.h> |
#include <Pegasus/WQL/WQLOperation.h> | #include <Pegasus/WQL/WQLOperation.h> |
#include <Pegasus/WQL/WQLOperand.h> | #include <Pegasus/WQL/WQLOperand.h> |
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#include <Pegasus/WQL/WQLParserState.h> |
#include <Pegasus/WQL/WQLSelectStatement.h> | #include <Pegasus/WQL/WQLSelectStatement.h> |
#include <string.h> | #include <string.h> |
#include <stdlib.h> | #include <stdlib.h> |
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# include <alloca.h> | # include <alloca.h> |
#endif | #endif |
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#if 1 |
#if 0 |
# define WQL_TRACE(X) printf(X) |
# define WQL_TRACE(X) printf X |
#else | #else |
# define WQL_TRACE(X) | # define WQL_TRACE(X) |
#endif | #endif |
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extern int WQL_lex(); | extern int WQL_lex(); |
extern int WQL_error(char*); | extern int WQL_error(char*); |
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// |
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// Define the global parser state object: |
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// |
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PEGASUS_USING_PEGASUS; |
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PEGASUS_NAMESPACE_BEGIN |
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extern WQLParserState* globalParserState; |
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PEGASUS_NAMESPACE_END |
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%} | %} |
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/* | /* |
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%token <intValue> TOK_WHERE | %token <intValue> TOK_WHERE |
%token <intValue> TOK_FROM | %token <intValue> TOK_FROM |
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%token <strValue> TOK_UNEXPECTED_CHAR |
%token <intValue> TOK_UNEXPECTED_CHAR |
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%type <nodeValue> propertyName |
%type <strValue> propertyName |
%type <nodeValue> propertyList | %type <nodeValue> propertyList |
%type <nodeValue> predicate | %type <nodeValue> predicate |
%type <nodeValue> comparisonPredicate | %type <nodeValue> comparisonPredicate |
%type <nodeValue> comparisonTerm |
// %type <nodeValue> comparisonTerm |
%type <nodeValue> nullPredicate | %type <nodeValue> nullPredicate |
%type <nodeValue> searchCondition | %type <nodeValue> searchCondition |
%type <nodeValue> fromClause | %type <nodeValue> fromClause |
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%type <nodeValue> selectList | %type <nodeValue> selectList |
%type <nodeValue> selectExpression | %type <nodeValue> selectExpression |
%type <strValue> className | %type <strValue> className |
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%type <intValue> truthValue |
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%left TOK_OR | %left TOK_OR |
%left TOK_AND | %left TOK_AND |
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start | start |
: selectStatement | : selectStatement |
{ | { |
printf("YACC: start\n"); |
WQL_TRACE(("YACC: start\n")); |
} | } |
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selectStatement | selectStatement |
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selectList | selectList |
: '*' | : '*' |
{ | { |
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globalParserState->statement->appendPropertyName("*"); |
} | } |
| propertyList | | propertyList |
{ | { |
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propertyList | propertyList |
: propertyName | : propertyName |
{ | { |
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globalParserState->statement->appendPropertyName($1); |
} | } |
| propertyList ',' propertyName | | propertyList ',' propertyName |
{ | { |
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globalParserState->statement->appendPropertyName($3); |
} | } |
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selectExpression | selectExpression |
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fromClause | fromClause |
: TOK_FROM className | : TOK_FROM className |
{ | { |
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WQL_TRACE(("YACC: fromClause: TOK_FROM className(%s)\n", $2)); |
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globalParserState->statement->setClassName($2); |
} | } |
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whereClause | whereClause |
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: searchCondition TOK_OR searchCondition | : searchCondition TOK_OR searchCondition |
{ | { |
WQL_TRACE(("YACC: TOK_OR\n")); | WQL_TRACE(("YACC: TOK_OR\n")); |
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globalParserState->statement->appendOperation(WQL_OR); |
} | } |
| searchCondition TOK_AND searchCondition | | searchCondition TOK_AND searchCondition |
{ | { |
WQL_TRACE(("YACC: TOK_AND\n")); | WQL_TRACE(("YACC: TOK_AND\n")); |
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globalParserState->statement->appendOperation(WQL_AND); |
} | } |
| TOK_NOT searchCondition | | TOK_NOT searchCondition |
{ | { |
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WQL_TRACE(("YACC: TOK_NOT\n")); |
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globalParserState->statement->appendOperation(WQL_NOT); |
} | } |
| '(' searchCondition ')' | | '(' searchCondition ')' |
{ | { |
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} | } |
| predicate TOK_IS truthValue | | predicate TOK_IS truthValue |
{ | { |
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WQLOperation op = $3 ? WQL_IS_TRUE : WQL_IS_FALSE; |
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globalParserState->statement->appendOperation(op); |
} | } |
| predicate TOK_IS TOK_NOT truthValue | | predicate TOK_IS TOK_NOT truthValue |
{ | { |
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WQLOperation op = $4 ? WQL_IS_NOT_TRUE : WQL_IS_NOT_FALSE; |
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globalParserState->statement->appendOperation(op); |
} | } |
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/******************************************************************************/ |
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predicate | predicate |
: comparisonPredicate | : comparisonPredicate |
{ | { |
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: comparisonTerm TOK_LT comparisonTerm | : comparisonTerm TOK_LT comparisonTerm |
{ | { |
WQL_TRACE(("YACC: TOK_LT\n")); | WQL_TRACE(("YACC: TOK_LT\n")); |
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globalParserState->statement->appendOperation(WQL_LT); |
} | } |
| comparisonTerm TOK_GT comparisonTerm | | comparisonTerm TOK_GT comparisonTerm |
{ | { |
WQL_TRACE(("YACC: TOK_GT\n")); | WQL_TRACE(("YACC: TOK_GT\n")); |
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globalParserState->statement->appendOperation(WQL_GT); |
} | } |
| comparisonTerm TOK_LE comparisonTerm | | comparisonTerm TOK_LE comparisonTerm |
{ | { |
WQL_TRACE(("YACC: TOK_LE\n")); | WQL_TRACE(("YACC: TOK_LE\n")); |
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globalParserState->statement->appendOperation(WQL_LE); |
} | } |
| comparisonTerm TOK_GE comparisonTerm | | comparisonTerm TOK_GE comparisonTerm |
{ | { |
WQL_TRACE(("YACC: TOK_GE\n")); | WQL_TRACE(("YACC: TOK_GE\n")); |
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globalParserState->statement->appendOperation(WQL_GE); |
} | } |
| comparisonTerm TOK_EQ comparisonTerm | | comparisonTerm TOK_EQ comparisonTerm |
{ | { |
WQL_TRACE(("YACC: TOK_EQ\n")); | WQL_TRACE(("YACC: TOK_EQ\n")); |
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globalParserState->statement->appendOperation(WQL_EQ); |
} | } |
| comparisonTerm TOK_NE comparisonTerm | | comparisonTerm TOK_NE comparisonTerm |
{ | { |
WQL_TRACE(("YACC: TOK_NE\n")); | WQL_TRACE(("YACC: TOK_NE\n")); |
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globalParserState->statement->appendOperation(WQL_NE); |
} | } |
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nullPredicate | nullPredicate |
: comparisonTerm TOK_IS TOK_NULL | : comparisonTerm TOK_IS TOK_NULL |
{ | { |
WQL_TRACE(("YACC: TOK_IS TOK_NULL\n")); |
WQL_TRACE(("YACC: nullPredicate : comparisonTerm IS NULL\n")); |
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globalParserState->statement->appendOperation(WQL_IS_NULL); |
} | } |
| comparisonTerm TOK_IS TOK_NOT TOK_NULL | | comparisonTerm TOK_IS TOK_NOT TOK_NULL |
{ | { |
WQL_TRACE(("YACC: TOK_NOT TOK_NULL\n")); |
WQL_TRACE(("YACC: nullPredicate : comparisonTerm IS NOT NULL\n")); |
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globalParserState->statement->appendOperation(WQL_IS_NOT_NULL); |
} | } |
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truthValue | truthValue |
: TOK_TRUE | : TOK_TRUE |
{ | { |
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$$ = 1; |
} | } |
| TOK_FALSE | | TOK_FALSE |
{ | { |
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$$ = 0; |
} | } |
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propertyName | propertyName |
: TOK_IDENTIFIER | : TOK_IDENTIFIER |
{ | { |
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WQL_TRACE(("YACC: propertyName : TOK_IDENTIFIER(%s)\n", $1)); |
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$$ = $1; |
} | } |
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className : TOK_IDENTIFIER | className : TOK_IDENTIFIER |
{ | { |
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WQL_TRACE(("YACC: TOK_IDENTIFIER %s\n", $1)); |
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$$ = $1; |
} | } |
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comparisonTerm | comparisonTerm |
: propertyName | : propertyName |
{ | { |
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globalParserState->statement->appendOperand( |
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WQLOperand($1, WQL_PROPERTY_NAME_TAG)); |
} | } |
| TOK_INTEGER | | TOK_INTEGER |
{ | { |
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globalParserState->statement->appendOperand( |
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WQLOperand($1, WQL_INTEGER_VALUE_TAG)); |
} | } |
| TOK_DOUBLE | | TOK_DOUBLE |
{ | { |
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globalParserState->statement->appendOperand( |
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WQLOperand($1, WQL_DOUBLE_VALUE_TAG)); |
} | } |
| TOK_STRING | | TOK_STRING |
{ | { |
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globalParserState->statement->appendOperand( |
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WQLOperand($1, WQL_STRING_VALUE_TAG)); |
} | } |
| truthValue | | truthValue |
{ | { |
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globalParserState->statement->appendOperand( |
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WQLOperand($1 != 0, WQL_BOOLEAN_VALUE_TAG)); |
} | } |
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%% | %% |
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int WQL_error(char* errorMessage) |
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{ |
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fprintf(stderr, "WQL_error: %s\n", errorMessage); |
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return -1; |
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} |
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