[51b73452] | 1 | #include <list>
|
---|
| 2 | #include <cassert>
|
---|
| 3 | #include <cstdlib>
|
---|
| 4 | #include <iterator>
|
---|
| 5 |
|
---|
| 6 | #include "utility.h"
|
---|
| 7 |
|
---|
| 8 | #include "SynTree/Statement.h"
|
---|
| 9 | #include "SynTree/Expression.h"
|
---|
| 10 | #include "SynTree/Constant.h"
|
---|
| 11 | #include "SynTree/Type.h"
|
---|
| 12 | #include "CaseRangeMutator.h"
|
---|
| 13 |
|
---|
| 14 | namespace ControlStruct {
|
---|
| 15 |
|
---|
| 16 | Statement* CaseRangeMutator::mutate(ChooseStmt *chooseStmt)
|
---|
| 17 | {
|
---|
| 18 | /* There shouldn't be any `choose' statements by now, throw an exception or something. */
|
---|
| 19 | throw( 0 ) ; /* FIXME */
|
---|
| 20 | }
|
---|
| 21 |
|
---|
| 22 | Statement* CaseRangeMutator::mutate(SwitchStmt *switchStmt)
|
---|
| 23 | {
|
---|
| 24 | std::list< Statement * > &cases = switchStmt->get_branches();
|
---|
| 25 |
|
---|
| 26 | // a `for' would be more natural... all this contortions are because `replace' invalidates the iterator
|
---|
| 27 | std::list< Statement * >::iterator i = cases.begin();
|
---|
| 28 | while ( i != cases.end() ) {
|
---|
| 29 | (*i)->acceptMutator( *this );
|
---|
| 30 |
|
---|
| 31 | if ( ! newCaseLabels.empty() ) {
|
---|
| 32 | std::list< Statement * > newCases;
|
---|
| 33 |
|
---|
| 34 | // transform( newCaseLabels.begin(), newCaseLabels.end(), bnd1st( ptr_fun( ctor< CaseStmt, Label, Expression * > ) ) );
|
---|
| 35 |
|
---|
| 36 | for ( std::list< Expression * >::iterator j = newCaseLabels.begin();
|
---|
| 37 | j != newCaseLabels.end(); j++ ) {
|
---|
| 38 | std::list<Label> emptyLabels;
|
---|
| 39 | std::list< Statement *> emptyStmts;
|
---|
| 40 | newCases.push_back( new CaseStmt( emptyLabels, *j, emptyStmts ) );
|
---|
| 41 | }
|
---|
| 42 |
|
---|
| 43 | if( CaseStmt *currentCase = dynamic_cast< CaseStmt * > ( *i ) )
|
---|
| 44 | if ( !currentCase->get_statements().empty() ) {
|
---|
| 45 | CaseStmt *lastCase = dynamic_cast< CaseStmt * > ( newCases.back() );
|
---|
| 46 | if ( lastCase == 0 ) { throw ( 0 ); /* FIXME */ } // something is very wrong, as I just made these, and they were all cases
|
---|
| 47 | // transfer the statement block (if any) to the new list:
|
---|
| 48 | lastCase->set_statements( currentCase->get_statements() );
|
---|
| 49 | }
|
---|
| 50 | std::list< Statement * >::iterator j = i; advance( j, 1 );
|
---|
| 51 | replace ( cases, i, newCases );
|
---|
| 52 | i = j;
|
---|
| 53 | newCaseLabels.clear();
|
---|
| 54 | } else
|
---|
| 55 | i++;
|
---|
| 56 | }
|
---|
| 57 |
|
---|
| 58 | return switchStmt;
|
---|
| 59 | }
|
---|
| 60 |
|
---|
| 61 | Statement* CaseRangeMutator::mutate(FallthruStmt *fallthruStmt)
|
---|
| 62 | {
|
---|
| 63 | //delete fallthruStmt;
|
---|
| 64 | return new NullStmt();
|
---|
| 65 | }
|
---|
| 66 |
|
---|
| 67 | Statement* CaseRangeMutator::mutate(CaseStmt *caseStmt)
|
---|
| 68 | {
|
---|
| 69 | UntypedExpr *cond;
|
---|
| 70 | if ( (cond = dynamic_cast< UntypedExpr * >( caseStmt->get_condition() )) != 0 ) {
|
---|
| 71 | NameExpr *nmfunc;
|
---|
| 72 | if ( (nmfunc = dynamic_cast< NameExpr *>( cond->get_function() )) != 0 ) {
|
---|
| 73 | if ( nmfunc->get_name() == std::string("Range") ) {
|
---|
| 74 | assert( cond->get_args().size() == 2 );
|
---|
| 75 | std::list<Expression *>::iterator i = cond->get_args().begin();
|
---|
| 76 | Expression *lo = *i, *hi = *(++i); // "unnecessary" temporaries
|
---|
| 77 | fillRange( lo, hi);
|
---|
| 78 | }
|
---|
| 79 | }
|
---|
| 80 | } else if ( TupleExpr *tcond = dynamic_cast< TupleExpr * >( caseStmt->get_condition() ) ) {
|
---|
| 81 | // case list
|
---|
| 82 | assert( ! tcond->get_exprs().empty() );
|
---|
| 83 | for ( std::list< Expression * >::iterator i = tcond->get_exprs().begin(); i != tcond->get_exprs().end(); i++ )
|
---|
| 84 | newCaseLabels.push_back( *i ); // do I need to clone them?
|
---|
| 85 | }
|
---|
| 86 |
|
---|
| 87 | std::list< Statement * > &stmts = caseStmt->get_statements();
|
---|
| 88 | mutateAll ( stmts, *this );
|
---|
| 89 |
|
---|
| 90 | return caseStmt;
|
---|
| 91 | }
|
---|
| 92 |
|
---|
| 93 | void CaseRangeMutator::fillRange(Expression *lo, Expression *hi) {
|
---|
| 94 | // generate the actual range (and check for consistency)
|
---|
| 95 | Constant *c_lo, *c_hi;
|
---|
| 96 | ConstantExpr *ce_lo, *ce_hi;
|
---|
| 97 | ce_lo = dynamic_cast< ConstantExpr * >( lo );
|
---|
| 98 | ce_hi = dynamic_cast< ConstantExpr * >( hi );
|
---|
| 99 |
|
---|
| 100 | if ( ce_lo && ce_hi ) {
|
---|
| 101 | c_lo = ce_lo->get_constant(); c_hi = ce_hi->get_constant();
|
---|
| 102 | } /* else {
|
---|
| 103 | if ( !ce_lo ) ;
|
---|
| 104 | if ( !ce_hi ) ;
|
---|
| 105 | } */
|
---|
| 106 | BasicType *ty_lo = dynamic_cast< BasicType * >( c_lo->get_type() ),
|
---|
| 107 | *ty_hi = dynamic_cast< BasicType * >( c_hi->get_type() );
|
---|
| 108 |
|
---|
| 109 | if( !ty_lo || !ty_hi )
|
---|
| 110 | return; // one of them is not a constant
|
---|
| 111 |
|
---|
| 112 |
|
---|
| 113 | switch( ty_lo->get_kind() ) {
|
---|
| 114 | case BasicType::Char:
|
---|
| 115 | case BasicType::UnsignedChar:
|
---|
| 116 | switch( ty_hi->get_kind() )
|
---|
| 117 | {
|
---|
| 118 | case BasicType::Char:
|
---|
| 119 | case BasicType::UnsignedChar:
|
---|
| 120 | // first case, they are both printable ASCII characters represented as 'x'
|
---|
| 121 | if ( c_lo->get_value().size() == 3 && c_hi->get_value().size() == 3 ) {
|
---|
| 122 | char ch_lo = (c_lo->get_value())[1], ch_hi = (c_hi->get_value())[1];
|
---|
| 123 |
|
---|
| 124 | if ( ch_lo > ch_hi ) { char t=ch_lo; ch_lo=ch_hi; ch_hi=t; }
|
---|
| 125 |
|
---|
| 126 | for( char c = ch_lo; c <= ch_hi; c++ ){
|
---|
| 127 | Type::Qualifiers q;
|
---|
| 128 | Constant cnst( new BasicType(q, BasicType::Char),
|
---|
| 129 | std::string("'") + c + std::string("'") );
|
---|
| 130 | newCaseLabels.push_back( new ConstantExpr( cnst ) );
|
---|
| 131 | }
|
---|
| 132 |
|
---|
| 133 | return;
|
---|
| 134 | }
|
---|
| 135 | break;
|
---|
| 136 | default:
|
---|
| 137 | // error: incompatible constants
|
---|
| 138 | break;
|
---|
| 139 | }
|
---|
| 140 | break;
|
---|
| 141 | case BasicType::ShortSignedInt:
|
---|
| 142 | case BasicType::ShortUnsignedInt:
|
---|
| 143 | case BasicType::SignedInt:
|
---|
| 144 | case BasicType::UnsignedInt:
|
---|
| 145 | case BasicType::LongSignedInt:
|
---|
| 146 | case BasicType::LongUnsignedInt:
|
---|
| 147 | case BasicType::LongLongSignedInt:
|
---|
| 148 | case BasicType::LongLongUnsignedInt:
|
---|
| 149 | switch( ty_hi->get_kind() )
|
---|
| 150 | {
|
---|
| 151 | case BasicType::ShortSignedInt:
|
---|
| 152 | case BasicType::ShortUnsignedInt:
|
---|
| 153 | case BasicType::SignedInt:
|
---|
| 154 | case BasicType::UnsignedInt:
|
---|
| 155 | case BasicType::LongSignedInt:
|
---|
| 156 | case BasicType::LongUnsignedInt:
|
---|
| 157 | case BasicType::LongLongSignedInt:
|
---|
| 158 | case BasicType::LongLongUnsignedInt: {
|
---|
| 159 | int i_lo = atoi(c_lo->get_value().c_str()),
|
---|
| 160 | i_hi = atoi(c_hi->get_value().c_str());
|
---|
| 161 |
|
---|
| 162 | if ( i_lo > i_hi ) { int t=i_lo; i_lo=i_hi; i_hi=t; }
|
---|
| 163 |
|
---|
| 164 | for( int c = i_lo; c <= i_hi; c++ ){
|
---|
| 165 | Type::Qualifiers q;
|
---|
| 166 | Constant cnst( new BasicType(q, ty_hi->get_kind()), // figure can't hurt (used to think in positives)
|
---|
| 167 | toString< int >( c ) );
|
---|
| 168 | newCaseLabels.push_back( new ConstantExpr( cnst ) );
|
---|
| 169 | }
|
---|
| 170 |
|
---|
| 171 | return;
|
---|
| 172 | }
|
---|
| 173 | default:
|
---|
| 174 | // error: incompatible constants
|
---|
| 175 | break;
|
---|
| 176 | }
|
---|
| 177 | break;
|
---|
| 178 | default:
|
---|
| 179 | break;
|
---|
| 180 | }
|
---|
| 181 |
|
---|
| 182 | /* End: */{
|
---|
| 183 | // invalid range, signal a warning (it still generates the two case labels)
|
---|
| 184 | newCaseLabels.push_back( lo );
|
---|
| 185 | newCaseLabels.push_back( hi );
|
---|
| 186 | return;
|
---|
| 187 | }
|
---|
| 188 | }
|
---|
| 189 |
|
---|
| 190 | } // namespace ControlStruct
|
---|