[d1e0979] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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| 7 | // Demangler.cc -- |
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| 8 | // |
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| 9 | // Author : Rob Schluntz |
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| 10 | // Created On : Thu Jul 19 12:52:41 2018 |
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| 11 | // Last Modified By : Rob Schluntz |
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| 12 | // Last Modified On : Thu Jul 19 12:54:35 2018 |
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| 13 | // Update Count : 2 |
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| 14 | // |
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| 15 | |
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| 16 | #include <algorithm> |
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| 17 | #include <sstream> |
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| 18 | |
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| 19 | #include "CodeGen/GenType.h" |
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| 20 | #include "Common/PassVisitor.h" |
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| 21 | #include "Mangler.h" |
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| 22 | #include "SynTree/Type.h" |
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| 23 | #include "SynTree/Declaration.h" |
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| 24 | |
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| 25 | // #define DEBUG |
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| 26 | #ifdef DEBUG |
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| 27 | #define PRINT(x) x |
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| 28 | #else |
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| 29 | #define PRINT(x) {} |
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| 30 | #endif |
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| 31 | |
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| 32 | namespace { |
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| 33 | struct GenType : public WithVisitorRef<GenType>, public WithShortCircuiting { |
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| 34 | std::string typeString; |
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| 35 | GenType( const std::string &typeString ); |
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| 36 | |
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| 37 | void previsit( BaseSyntaxNode * ); |
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| 38 | void postvisit( BaseSyntaxNode * ); |
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| 39 | |
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| 40 | void postvisit( FunctionType * funcType ); |
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| 41 | void postvisit( VoidType * voidType ); |
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| 42 | void postvisit( BasicType * basicType ); |
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| 43 | void postvisit( PointerType * pointerType ); |
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| 44 | void postvisit( ArrayType * arrayType ); |
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| 45 | void postvisit( ReferenceType * refType ); |
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| 46 | void postvisit( StructInstType * structInst ); |
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| 47 | void postvisit( UnionInstType * unionInst ); |
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| 48 | void postvisit( EnumInstType * enumInst ); |
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| 49 | void postvisit( TypeInstType * typeInst ); |
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| 50 | void postvisit( TupleType * tupleType ); |
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| 51 | void postvisit( VarArgsType * varArgsType ); |
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| 52 | void postvisit( ZeroType * zeroType ); |
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| 53 | void postvisit( OneType * oneType ); |
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| 54 | void postvisit( GlobalScopeType * globalType ); |
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| 55 | void postvisit( QualifiedType * qualType ); |
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| 56 | |
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| 57 | private: |
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| 58 | void handleQualifiers( Type *type ); |
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| 59 | std::string handleGeneric( ReferenceToType * refType ); |
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| 60 | void genArray( const Type::Qualifiers &qualifiers, Type *base, Expression *dimension, bool isVarLen, bool isStatic ); |
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| 61 | }; |
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| 62 | |
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| 63 | std::string genDemangleType( Type * type, const std::string & baseString ) { |
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| 64 | PassVisitor<GenType> gt( baseString ); |
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| 65 | assert( type ); |
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| 66 | type->accept( gt ); |
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| 67 | return gt.pass.typeString; |
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| 68 | } |
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| 69 | |
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| 70 | GenType::GenType( const std::string &typeString ) : typeString( typeString ) {} |
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| 71 | |
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| 72 | // *** BaseSyntaxNode |
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| 73 | void GenType::previsit( BaseSyntaxNode * ) { |
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| 74 | // turn off automatic recursion for all nodes, to allow each visitor to |
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| 75 | // precisely control the order in which its children are visited. |
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| 76 | visit_children = false; |
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| 77 | } |
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| 78 | |
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| 79 | void GenType::postvisit( BaseSyntaxNode * node ) { |
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| 80 | std::stringstream ss; |
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| 81 | node->print( ss ); |
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| 82 | assertf( false, "Unhandled node reached in GenType: %s", ss.str().c_str() ); |
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| 83 | } |
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| 84 | |
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| 85 | void GenType::postvisit( VoidType * voidType ) { |
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| 86 | typeString = "void " + typeString; |
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| 87 | handleQualifiers( voidType ); |
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| 88 | } |
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| 89 | |
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| 90 | void GenType::postvisit( BasicType * basicType ) { |
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| 91 | BasicType::Kind kind = basicType->kind; |
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| 92 | assert( 0 <= kind && kind < BasicType::NUMBER_OF_BASIC_TYPES ); |
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| 93 | typeString = std::string( BasicType::typeNames[kind] ) + " " + typeString; |
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| 94 | handleQualifiers( basicType ); |
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| 95 | } |
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| 96 | |
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| 97 | void GenType::genArray( const Type::Qualifiers & qualifiers, Type * base, Expression *dimension, bool isVarLen, bool ) { |
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| 98 | std::ostringstream os; |
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| 99 | if ( typeString != "" ) { |
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| 100 | if ( typeString[ 0 ] == '*' ) { |
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| 101 | os << "(" << typeString << ")"; |
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| 102 | } else { |
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| 103 | os << typeString; |
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| 104 | } // if |
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| 105 | } // if |
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| 106 | os << "["; |
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| 107 | |
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| 108 | if ( qualifiers.is_const ) { |
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| 109 | os << "const "; |
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| 110 | } // if |
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| 111 | if ( qualifiers.is_volatile ) { |
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| 112 | os << "volatile "; |
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| 113 | } // if |
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| 114 | if ( qualifiers.is_restrict ) { |
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| 115 | os << "__restrict "; |
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| 116 | } // if |
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| 117 | if ( qualifiers.is_atomic ) { |
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| 118 | os << "_Atomic "; |
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| 119 | } // if |
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| 120 | if ( dimension != 0 ) { |
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| 121 | // TODO: ??? |
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| 122 | // PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks ); |
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| 123 | // dimension->accept( cg ); |
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| 124 | } else if ( isVarLen ) { |
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| 125 | // no dimension expression on a VLA means it came in with the * token |
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| 126 | os << "*"; |
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| 127 | } // if |
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| 128 | os << "]"; |
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| 129 | |
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| 130 | typeString = os.str(); |
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| 131 | |
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| 132 | base->accept( *visitor ); |
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| 133 | } |
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| 134 | |
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| 135 | void GenType::postvisit( PointerType * pointerType ) { |
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| 136 | assert( pointerType->base != 0); |
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| 137 | if ( pointerType->get_isStatic() || pointerType->get_isVarLen() || pointerType->dimension ) { |
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| 138 | assert(false); |
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| 139 | genArray( pointerType->get_qualifiers(), pointerType->base, pointerType->dimension, pointerType->get_isVarLen(), pointerType->get_isStatic() ); |
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| 140 | } else { |
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| 141 | handleQualifiers( pointerType ); |
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| 142 | if ( typeString[ 0 ] == '?' ) { |
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| 143 | typeString = "* " + typeString; |
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| 144 | } else { |
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| 145 | typeString = "*" + typeString; |
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| 146 | } // if |
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| 147 | pointerType->base->accept( *visitor ); |
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| 148 | } // if |
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| 149 | } |
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| 150 | |
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| 151 | void GenType::postvisit( ArrayType * arrayType ) { |
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| 152 | genArray( arrayType->get_qualifiers(), arrayType->base, arrayType->dimension, arrayType->get_isVarLen(), arrayType->get_isStatic() ); |
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| 153 | } |
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| 154 | |
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| 155 | void GenType::postvisit( ReferenceType * refType ) { |
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| 156 | assert( false ); |
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| 157 | assert( refType->base != 0); |
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| 158 | handleQualifiers( refType ); |
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| 159 | typeString = "&" + typeString; |
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| 160 | refType->base->accept( *visitor ); |
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| 161 | } |
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| 162 | |
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| 163 | void GenType::postvisit( FunctionType * funcType ) { |
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| 164 | std::ostringstream os; |
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| 165 | |
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| 166 | if ( typeString != "" ) { |
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| 167 | if ( typeString[0] == '*' ) { |
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| 168 | os << "(" << typeString << ")"; |
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| 169 | } else { |
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| 170 | os << typeString; |
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| 171 | } // if |
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| 172 | } // if |
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| 173 | |
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| 174 | /************* parameters ***************/ |
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| 175 | const std::list<DeclarationWithType *> &pars = funcType->parameters; |
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| 176 | |
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| 177 | if ( pars.empty() ) { |
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| 178 | if ( funcType->get_isVarArgs() ) { |
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| 179 | os << "()"; |
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| 180 | } else { |
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| 181 | os << "(void)"; |
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| 182 | } // if |
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| 183 | } else { |
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| 184 | os << "(" ; |
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| 185 | |
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| 186 | unsigned int i = 0; |
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| 187 | for (DeclarationWithType * p : pars) { |
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| 188 | os << genDemangleType( p->get_type(), "" ); |
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| 189 | if (++i != pars.size()) os << ", "; |
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| 190 | } |
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| 191 | |
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| 192 | if ( funcType->get_isVarArgs() ) { |
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| 193 | os << ", ..."; |
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| 194 | } // if |
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| 195 | os << ")"; |
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| 196 | } // if |
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| 197 | |
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| 198 | typeString = os.str(); |
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| 199 | |
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| 200 | if ( funcType->returnVals.size() == 0 ) { |
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| 201 | typeString += ": void"; |
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| 202 | } else { |
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| 203 | typeString += ": " + genDemangleType(funcType->returnVals.front()->get_type(), ""); |
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| 204 | } // if |
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| 205 | |
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| 206 | // add forall |
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| 207 | if( ! funcType->forall.empty() ) { |
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| 208 | std::ostringstream os; |
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| 209 | os << "forall("; |
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| 210 | unsigned int i = 0; |
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| 211 | for ( auto td : funcType->forall ) { |
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| 212 | os << td->typeString() << " " << td->name; |
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| 213 | if (! td->assertions.empty()) { |
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| 214 | os << " | { "; |
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| 215 | unsigned int j = 0; |
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| 216 | for (DeclarationWithType * assert : td->assertions) { |
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| 217 | os << genDemangleType(assert->get_type(), assert->name); |
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| 218 | if (++j != td->assertions.size()) os << ", "; |
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| 219 | } |
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| 220 | os << "}"; |
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| 221 | } |
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| 222 | if (++i != funcType->forall.size()) os << ", "; |
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| 223 | } |
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| 224 | os << ")"; |
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| 225 | typeString = typeString + " -> " + os.str(); |
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| 226 | } |
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| 227 | } |
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| 228 | |
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| 229 | std::string GenType::handleGeneric( ReferenceToType * refType ) { |
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| 230 | if ( ! refType->parameters.empty() ) { |
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| 231 | std::ostringstream os; |
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| 232 | // TODO: ??? |
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| 233 | // PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks ); |
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| 234 | os << "("; |
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| 235 | // cg.pass.genCommaList( refType->parameters.begin(), refType->parameters.end() ); |
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| 236 | os << ") "; |
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| 237 | return os.str(); |
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| 238 | } |
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| 239 | return ""; |
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| 240 | } |
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| 241 | |
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| 242 | void GenType::postvisit( StructInstType * structInst ) { |
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| 243 | typeString = "struct " + structInst->name + handleGeneric( structInst ) + " " + typeString; |
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| 244 | handleQualifiers( structInst ); |
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| 245 | } |
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| 246 | |
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| 247 | void GenType::postvisit( UnionInstType * unionInst ) { |
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| 248 | typeString = "union " + unionInst->name + handleGeneric( unionInst ) + " " + typeString; |
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| 249 | handleQualifiers( unionInst ); |
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| 250 | } |
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| 251 | |
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| 252 | void GenType::postvisit( EnumInstType * enumInst ) { |
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| 253 | typeString = "enum " + enumInst->name + " " + typeString; |
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| 254 | handleQualifiers( enumInst ); |
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| 255 | } |
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| 256 | |
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| 257 | void GenType::postvisit( TypeInstType * typeInst ) { |
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| 258 | typeString = typeInst->name + " " + typeString; |
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| 259 | handleQualifiers( typeInst ); |
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| 260 | } |
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| 261 | |
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| 262 | void GenType::postvisit( TupleType * tupleType ) { |
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| 263 | unsigned int i = 0; |
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| 264 | std::ostringstream os; |
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| 265 | os << "["; |
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| 266 | for ( Type * t : *tupleType ) { |
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| 267 | i++; |
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| 268 | os << genDemangleType( t, "" ) << (i == tupleType->size() ? "" : ", "); |
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| 269 | } |
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| 270 | os << "] "; |
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| 271 | typeString = os.str() + typeString; |
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| 272 | } |
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| 273 | |
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| 274 | void GenType::postvisit( VarArgsType * varArgsType ) { |
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| 275 | typeString = "__builtin_va_list " + typeString; |
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| 276 | handleQualifiers( varArgsType ); |
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| 277 | } |
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| 278 | |
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| 279 | void GenType::postvisit( ZeroType * zeroType ) { |
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| 280 | // ideally these wouldn't hit codegen at all, but should be safe to make them ints |
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| 281 | typeString = "zero_t " + typeString; |
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| 282 | handleQualifiers( zeroType ); |
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| 283 | } |
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| 284 | |
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| 285 | void GenType::postvisit( OneType * oneType ) { |
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| 286 | // ideally these wouldn't hit codegen at all, but should be safe to make them ints |
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| 287 | typeString = "one_t " + typeString; |
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| 288 | handleQualifiers( oneType ); |
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| 289 | } |
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| 290 | |
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| 291 | void GenType::postvisit( GlobalScopeType * globalType ) { |
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| 292 | handleQualifiers( globalType ); |
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| 293 | } |
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| 294 | |
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| 295 | void GenType::postvisit( QualifiedType * qualType ) { |
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| 296 | std::ostringstream os; |
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| 297 | os << genDemangleType( qualType->parent, "" ) << "." << genDemangleType( qualType->child, "" ) << typeString; |
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| 298 | typeString = os.str(); |
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| 299 | handleQualifiers( qualType ); |
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| 300 | } |
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| 301 | |
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| 302 | void GenType::handleQualifiers( Type * type ) { |
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| 303 | if ( type->get_const() ) { |
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| 304 | typeString = "const " + typeString; |
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| 305 | } // if |
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| 306 | if ( type->get_volatile() ) { |
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| 307 | typeString = "volatile " + typeString; |
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| 308 | } // if |
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| 309 | if ( type->get_restrict() ) { |
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| 310 | typeString = "__restrict " + typeString; |
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| 311 | } // if |
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| 312 | if ( type->get_atomic() ) { |
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| 313 | typeString = "_Atomic " + typeString; |
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| 314 | } // if |
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| 315 | if ( type->get_lvalue() ) { |
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| 316 | // when not generating C code, print lvalue for debugging. |
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| 317 | typeString = "lvalue " + typeString; |
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| 318 | } |
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| 319 | } |
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| 320 | } |
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| 321 | |
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| 322 | |
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| 323 | namespace SymTab { |
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| 324 | namespace Mangler { |
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| 325 | namespace { |
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| 326 | // strips __NAME__cfa__TYPE_N, where N is [0-9]+: returns str is a match is found, returns empty string otherwise |
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| 327 | bool stripMangleName(const std::string & mangleName, std::string & name, std::string & type) { |
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| 328 | PRINT( std::cerr << "====== " << mangleName.size() << " " << mangleName << std::endl; ) |
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| 329 | if (mangleName.size() < 4+nameSeparator.size()) return false; |
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| 330 | if (mangleName[0] != '_' || mangleName[1] != '_' || ! isdigit(mangleName.back())) return false; |
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| 331 | |
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| 332 | // find bounds for name |
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| 333 | size_t nameStart = 2; |
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| 334 | size_t nameEnd = mangleName.rfind(nameSeparator); |
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| 335 | PRINT( std::cerr << nameStart << " " << nameEnd << std::endl; ) |
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| 336 | if (nameEnd == std::string::npos) return false; |
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| 337 | |
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| 338 | // find bounds for type |
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| 339 | size_t typeStart = nameEnd+nameSeparator.size(); |
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| 340 | size_t typeEnd = mangleName.size()-1; |
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| 341 | PRINT( std::cerr << typeStart << " " << typeEnd << std::endl; ) |
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| 342 | PRINT( std::cerr << "["); |
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| 343 | while (isdigit(mangleName[typeEnd])) { |
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| 344 | PRINT(std::cerr << "."); |
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| 345 | typeEnd--; |
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| 346 | } |
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| 347 | PRINT( std::cerr << "]" << std::endl ); |
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| 348 | if (mangleName[typeEnd] != '_') return false; |
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| 349 | PRINT( std::cerr << typeEnd << std::endl; ) |
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| 350 | |
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| 351 | // trim and return |
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| 352 | name = mangleName.substr(nameStart, nameEnd-nameStart); |
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| 353 | type = mangleName.substr(typeStart, typeEnd-typeStart); |
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| 354 | return true; |
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| 355 | } |
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| 356 | |
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| 357 | /// determines if `pref` is a prefix of `str` |
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| 358 | static inline bool isPrefix( const std::string & str, const std::string & pref, unsigned int idx ) { |
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| 359 | if ( pref.size() > str.size()-idx ) return false; |
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| 360 | auto its = std::mismatch( pref.begin(), pref.end(), std::next(str.begin(), idx) ); |
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| 361 | return its.first == pref.end(); |
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| 362 | } |
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| 363 | |
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| 364 | Type * parseType(const std::string & typeString, unsigned int & idx) { |
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| 365 | if (idx >= typeString.size()) return nullptr; |
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| 366 | |
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| 367 | // qualifiers |
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| 368 | Type::Qualifiers tq; |
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| 369 | while (true) { |
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| 370 | auto qual = std::find_if(qualifierLetter.begin(), qualifierLetter.end(), [&idx, &typeString](decltype(qualifierLetter)::value_type val) { |
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| 371 | if (isPrefix(typeString, val.second, idx)) { |
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| 372 | PRINT( std::cerr << "found qualifier: " << val.second << std::endl; ) |
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| 373 | idx += std::string(val.second).size(); |
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| 374 | return true; |
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| 375 | } |
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| 376 | return false; |
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| 377 | }); |
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| 378 | if (qual == qualifierLetter.end()) break; |
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| 379 | tq |= qual->first; |
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| 380 | } |
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| 381 | |
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| 382 | // basic types |
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| 383 | const char ** letter = std::find_if(&btLetter[0], &btLetter[numBtLetter], [&idx, &typeString](const std::string & letter) { |
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| 384 | if (isPrefix(typeString, letter, idx)) { |
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| 385 | idx += letter.size(); |
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| 386 | return true; |
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| 387 | } |
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| 388 | return false; |
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| 389 | }); |
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| 390 | if (letter != &btLetter[numBtLetter]) { |
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| 391 | PRINT( std::cerr << "basic type: " << (letter-btLetter) << std::endl; ) |
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| 392 | BasicType::Kind k = (BasicType::Kind)(letter-btLetter); |
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| 393 | return new BasicType( tq, k ); |
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| 394 | } // BasicType? |
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| 395 | |
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| 396 | // everything else |
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| 397 | switch(typeString[idx++]) { |
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| 398 | case 'F': { |
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| 399 | PRINT( std::cerr << "function..." << std::endl; ) |
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| 400 | if (idx >= typeString.size()) return nullptr; |
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| 401 | FunctionType * ftype = new FunctionType( tq, false ); |
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| 402 | Type * retVal = parseType(typeString, idx); |
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| 403 | if (! retVal) return nullptr; |
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| 404 | PRINT( std::cerr << "with return type: " << retVal << std::endl; ) |
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| 405 | ftype->returnVals.push_back(ObjectDecl::newObject("", retVal, nullptr)); |
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| 406 | if (idx >= typeString.size() || typeString[idx++] != '_') return nullptr; |
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| 407 | while (idx < typeString.size()) { |
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| 408 | PRINT( std::cerr << "got ch: " << typeString[idx] << std::endl; ) |
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| 409 | if (typeString[idx] == '_') break; |
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| 410 | Type * param = parseType(typeString, idx); |
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| 411 | if (! param) return nullptr; |
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| 412 | PRINT( std::cerr << "with parameter : " << param << std::endl; ) |
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| 413 | ftype->parameters.push_back(ObjectDecl::newObject("", param, nullptr)); |
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| 414 | } |
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| 415 | if (idx >= typeString.size() || typeString[idx] != '_') return nullptr; |
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| 416 | ++idx; |
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| 417 | return ftype; |
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| 418 | } |
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| 419 | case 'v': |
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| 420 | return new VoidType( tq ); |
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| 421 | case 'T': { |
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| 422 | PRINT( std::cerr << "tuple..." << std::endl; ) |
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| 423 | std::list< Type * > types; |
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| 424 | while (idx < typeString.size()) { |
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| 425 | PRINT( std::cerr << "got ch: " << typeString[idx] << std::endl; ) |
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| 426 | if (typeString[idx] == '_') break; |
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| 427 | Type * t = parseType(typeString, idx); |
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| 428 | if (! t) return nullptr; |
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| 429 | PRINT( std::cerr << "with type : " << t << std::endl; ) |
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| 430 | types.push_back(t); |
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| 431 | } |
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| 432 | if (idx >= typeString.size() || typeString[idx] != '_') return nullptr; |
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| 433 | ++idx; |
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| 434 | return new TupleType( tq, types ); |
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| 435 | } |
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| 436 | case 'P': { |
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| 437 | PRINT( std::cerr << "pointer..." << std::endl; ) |
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| 438 | Type * t = parseType(typeString, idx); |
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| 439 | if (! t) return nullptr; |
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| 440 | return new PointerType( tq, t ); |
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| 441 | } |
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| 442 | |
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| 443 | default: assertf(false, "Unhandled type letter: %c at index: %u", typeString[idx], idx); |
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| 444 | } |
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| 445 | return nullptr; |
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| 446 | } |
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| 447 | |
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| 448 | Type * parseType(const std::string & typeString) { |
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| 449 | unsigned int idx = 0; |
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| 450 | return parseType(typeString, idx); |
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| 451 | } |
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| 452 | } // namespace |
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| 453 | } // namespace Mangler |
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| 454 | } // namespace SymTab |
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| 455 | |
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| 456 | extern "C" { |
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| 457 | std::string cforall_demangle(const std::string & mangleName) { |
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| 458 | std::string name, type; |
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| 459 | if (! SymTab::Mangler::stripMangleName(mangleName, name, type)) return mangleName; |
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| 460 | PRINT( std::cerr << name << " " << type << std::endl; ) |
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| 461 | Type * t = SymTab::Mangler::parseType(type); |
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| 462 | if (! t) return mangleName; |
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| 463 | return genDemangleType(t, name); |
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| 464 | } // extern "C" |
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| 465 | } |
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| 466 | |
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| 467 | // Local Variables: // |
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| 468 | // tab-width: 4 // |
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| 469 | // mode: c++ // |
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| 470 | // compile-command: "make install" // |
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| 471 | // End: // |
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