| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 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 | // ParseNode.cc --
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| 8 | //
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| 9 | // Author : Rodolfo G. Esteves
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| 10 | // Created On : Sat May 16 13:26:29 2015
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Thu Jun 30 21:13:12 2016
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| 13 | // Update Count : 52
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| 14 | //
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| 15 |
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| 16 | #include <climits>
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| 17 | #include "ParseNode.h"
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| 18 | using namespace std;
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| 19 |
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| 20 | // Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
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| 21 | //
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| 22 | // prefix action constant action suffix
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| 23 | //
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| 24 | // Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
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| 25 | //
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| 26 | // constant BEGIN CONT ...
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| 27 | // <CONT>(...)? BEGIN 0 ... // possible empty suffix
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| 28 | //
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| 29 | // because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
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| 30 | // type.
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| 31 |
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| 32 | static inline bool checkU( char c ) { return c == 'u' || c == 'U'; }
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| 33 | static inline bool checkL( char c ) { return c == 'l' || c == 'L'; }
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| 34 | static inline bool checkF( char c ) { return c == 'f' || c == 'F'; }
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| 35 | static inline bool checkD( char c ) { return c == 'd' || c == 'D'; }
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| 36 | static inline bool checkI( char c ) { return c == 'i' || c == 'I'; }
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| 37 | static inline bool checkX( char c ) { return c == 'x' || c == 'X'; }
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| 38 |
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| 39 | BasicType::Kind literalType( ConstantNode::Type type, string &value ) {
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| 40 | BasicType::Kind btype;
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| 41 |
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| 42 | // lexing divides constants into 4 kinds
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| 43 | switch ( type ) {
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| 44 | case ConstantNode::Integer:
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| 45 | {
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| 46 | static const BasicType::Kind kind[2][3] = {
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| 47 | { BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt },
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| 48 | { BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt },
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| 49 | };
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| 50 | bool dec = true, Unsigned = false; // decimal, unsigned constant
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| 51 | int size; // 0 => int, 1 => long, 2 => long long
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| 52 | unsigned long long v; // converted integral value
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| 53 | size_t last = value.length() - 1; // last character of constant
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| 54 |
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| 55 | if ( value[0] == '0' ) { // octal constant ?
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| 56 | dec = false;
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| 57 | if ( last != 0 && checkX( value[1] ) ) { // hex constant ?
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| 58 | sscanf( (char *)value.c_str(), "%llx", &v );
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| 59 | //printf( "%llx %llu\n", v, v );
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| 60 | } else {
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| 61 | sscanf( (char *)value.c_str(), "%llo", &v );
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| 62 | //printf( "%llo %llu\n", v, v );
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| 63 | } // if
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| 64 | } else { // decimal constant ?
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| 65 | sscanf( (char *)value.c_str(), "%llu", &v );
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| 66 | //printf( "%llu %llu\n", v, v );
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| 67 | } // if
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| 68 |
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| 69 | if ( v <= INT_MAX ) { // signed int
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| 70 | size = 0;
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| 71 | } else if ( v <= UINT_MAX && ! dec ) { // unsigned int
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| 72 | size = 0;
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| 73 | Unsigned = true; // unsigned
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| 74 | } else if ( v <= LONG_MAX ) { // signed long int
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| 75 | size = 1;
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| 76 | } else if ( v <= ULONG_MAX && ( ! dec || LONG_MAX == LLONG_MAX ) ) { // signed long int
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| 77 | size = 1;
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| 78 | Unsigned = true; // unsigned long int
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| 79 | } else if ( v <= LLONG_MAX ) { // signed long long int
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| 80 | size = 2;
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| 81 | } else { // unsigned long long int
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| 82 | size = 2;
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| 83 | Unsigned = true; // unsigned long long int
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| 84 | } // if
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| 85 |
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| 86 | if ( checkU( value[last] ) ) { // suffix 'u' ?
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| 87 | Unsigned = true;
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| 88 | if ( last > 0 && checkL( value[ last - 1 ] ) ) { // suffix 'l' ?
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| 89 | size = 1;
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| 90 | if ( last > 1 && checkL( value[ last - 2 ] ) ) { // suffix 'll' ?
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| 91 | size = 2;
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| 92 | } // if
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| 93 | } // if
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| 94 | } else if ( checkL( value[ last ] ) ) { // suffix 'l' ?
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| 95 | size = 1;
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| 96 | if ( last > 0 && checkL( value[ last - 1 ] ) ) { // suffix 'll' ?
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| 97 | size = 2;
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| 98 | if ( last > 1 && checkU( value[ last - 2 ] ) ) { // suffix 'u' ?
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| 99 | Unsigned = true;
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| 100 | } // if
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| 101 | } else {
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| 102 | if ( last > 0 && checkU( value[ last - 1 ] ) ) { // suffix 'u' ?
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| 103 | Unsigned = true;
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| 104 | } // if
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| 105 | } // if
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| 106 | } // if
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| 107 | btype = kind[Unsigned][size]; // lookup constant type
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| 108 | break;
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| 109 | }
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| 110 | case ConstantNode::Float:
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| 111 | {
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| 112 | static const BasicType::Kind kind[2][3] = {
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| 113 | { BasicType::Float, BasicType::Double, BasicType::LongDouble },
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| 114 | { BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
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| 115 | };
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| 116 | bool complx = false; // real, complex
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| 117 | int size = 1; // 0 => float, 1 => double (default), 2 => long double
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| 118 | // floating-point constant has minimum of 2 characters: 1. or .1
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| 119 | size_t last = value.length() - 1;
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| 120 |
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| 121 | if ( checkI( value[last] ) ) { // imaginary ?
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| 122 | complx = true;
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| 123 | last -= 1; // backup one character
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| 124 | } // if
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| 125 | if ( checkF( value[last] ) ) { // float ?
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| 126 | size = 0;
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| 127 | } else if ( checkD( value[last] ) ) { // double ?
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| 128 | size = 1;
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| 129 | } else if ( checkL( value[last] ) ) { // long double ?
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| 130 | size = 2;
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| 131 | } // if
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| 132 | if ( ! complx && checkI( value[last - 1] ) ) { // imaginary ?
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| 133 | complx = true;
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| 134 | } // if
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| 135 | btype = kind[complx][size]; // lookup constant type
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| 136 | break;
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| 137 | }
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| 138 | case ConstantNode::Character:
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| 139 | btype = BasicType::Char; // default
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| 140 | if ( string( "LUu" ).find( value[0] ) != string::npos ) {
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| 141 | // ???
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| 142 | } // if
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| 143 | break;
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| 144 | case ConstantNode::String:
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| 145 | assert( false );
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| 146 | // array of char
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| 147 | if ( string( "LUu" ).find( value[0] ) != string::npos ) {
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| 148 | if ( value[0] == 'u' && value[1] == '8' ) {
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| 149 | // ???
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| 150 | } else {
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| 151 | // ???
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| 152 | } // if
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| 153 | } // if
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| 154 | break;
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| 155 | } // switch
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| 156 | return btype;
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| 157 | } // literalType
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| 158 |
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| 159 |
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| 160 | ConstantNode *makeConstant( ConstantNode::Type type, std::string *str ) {
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| 161 | ::Type::Qualifiers emptyQualifiers; // no qualifiers on constants
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| 162 | return new ConstantNode( new ConstantExpr( Constant( new BasicType( emptyQualifiers, literalType( type, *str ) ), *str ), nullptr ) );
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| 163 | }
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| 164 |
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| 165 | ConstantNode *makeConstantStr( ConstantNode::Type type, std::string *str ) {
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| 166 | ::Type::Qualifiers emptyQualifiers; // no qualifiers on constants
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| 167 | // string should probably be a primitive type
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| 168 | ArrayType *at = new ArrayType( emptyQualifiers, new BasicType( emptyQualifiers, BasicType::Char ),
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| 169 | new ConstantExpr(
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| 170 | Constant( new BasicType( emptyQualifiers, BasicType::UnsignedInt ),
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| 171 | toString( str->size()+1-2 ) ) ), // +1 for '\0' and -2 for '"'
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| 172 | false, false );
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| 173 | return new ConstantNode( new ConstantExpr( Constant( at, *str ), nullptr ) );
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| 174 | }
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| 175 |
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| 176 |
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| 177 | // Builder
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| 178 | int ParseNode::indent_by = 4;
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| 179 |
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| 180 | ParseNode::ParseNode() : next( 0 ) {};
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| 181 | ParseNode::ParseNode( const string *name ) : name( *name ), next( 0 ) { delete name; }
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| 182 | ParseNode::ParseNode( const string &name ) : name( name ), next( 0 ) { }
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| 183 |
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| 184 | ParseNode::~ParseNode() {
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| 185 | delete next;
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| 186 | };
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| 187 |
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| 188 | ParseNode *ParseNode::get_last() {
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| 189 | ParseNode *current = this;
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| 190 |
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| 191 | while ( current->get_link() != 0 )
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| 192 | current = current->get_link();
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| 193 |
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| 194 | return current;
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| 195 | }
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| 196 |
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| 197 | ParseNode *ParseNode::set_link( ParseNode *next_ ) {
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| 198 | if ( next_ == 0 ) return this;
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| 199 | get_last()->next = next_;
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| 200 | return this;
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| 201 | }
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| 202 |
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| 203 | void ParseNode::print( std::ostream &os, int indent ) const {}
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| 204 |
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| 205 |
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| 206 | void ParseNode::printList( std::ostream &os, int indent ) const {
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| 207 | print( os, indent );
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| 208 |
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| 209 | if ( next ) {
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| 210 | next->printList( os, indent );
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| 211 | } // if
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| 212 | }
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| 213 |
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| 214 | ParseNode &ParseNode::operator,( ParseNode &p ) {
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| 215 | set_link( &p );
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| 216 |
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| 217 | return *this;
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| 218 | }
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| 219 |
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| 220 | ParseNode *mkList( ParseNode &pn ) {
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| 221 | // it just relies on `operator,' to take care of the "arguments" and provides a nice interface to an awful-looking
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| 222 | // address-of, rendering, for example (StatementNode *)(&(*$5 + *$7)) into (StatementNode *)mkList(($5, $7))
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| 223 | // (although "nice" is probably not the word)
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| 224 | return &pn;
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| 225 | }
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| 226 |
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| 227 | // Local Variables: //
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| 228 | // tab-width: 4 //
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| 229 | // mode: c++ //
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| 230 | // compile-command: "make install" //
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| 231 | // End: //
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