source: translator/InitTweak/BasicInit.cc @ 51b7345

#include <list>
#include <cassert>
#include <iostream>
#include <iterator>
#include <algorithm>

#include "utility.h"

#include "SynTree/Type.h"
#include "SynTree/Statement.h"
#include "SynTree/Expression.h"
#include "SynTree/Declaration.h"
#include "SynTree/Initializer.h"

#include "BasicInit.h"
#include "NameCollector.h"
#include "NameAssociation.h"

namespace InitTweak {

  CompoundStmt* BasicInit::mutate(CompoundStmt *compoundStmt)
  {
    index.visit( compoundStmt );

    std::list< Statement * > &kids = compoundStmt->get_kids();
    std::list< Statement * > newKids;

    for ( std::list< Statement * >::iterator i = kids.begin(); i!= kids.end(); i++ ) {
      //BasicInit newMut(  );
      (*i)->acceptMutator( *this );
      newKids.push_back( *i );

      if ( has_bindings() ) { //       if ( get_bindings() != 0  ) {
        std::list< Statement *> newSt = get_statements();
        //newSt.push_back( *i );
        newKids.splice( newKids.end(), newSt );
        bindings = 0;
        stmts.clear();
      }
    }

    compoundStmt->get_kids() = newKids;
    return compoundStmt;
  }

  Statement * BasicInit::mutate(DeclStmt *declStmt) {

    declStmt->accept( index );

    ObjectDecl *odecl = 0;

    if( ( odecl = dynamic_cast<ObjectDecl *>(declStmt->get_decl()) ) != 0 ){

      Initializer *init = odecl->get_init();
      if ( init == 0 ) return declStmt;

      if ( Classify::type( odecl->get_type() ) == Classify::COMPOUND_T )
        if ( Classify::initializer(init) == Classify::SINGLE_I )
          throw( 0 ); // mismatch of type and initializer
        else {
          NameInCollection *col = Classify::declaration( odecl, &index );
          bindings = NameAssociation< Expression *, BreakInitializer >::createNameAssoc(col);
          bindings->add_value( std::string(""), BreakInitializer(init) );
          BasicInit::build_statements( bindings, odecl->get_name(), stmts );
        }
      else
        if ( Classify::initializer(init) == Classify::COMPOUND_I )
          throw( 0 ); // mismatch of type and initializer
        else {
          // Single inits
          SingleInit *sinit = dynamic_cast< SingleInit * > ( init );
          assert( sinit != 0);

          std::list<Expression *> args;
          args.push_back( new AddressExpr( new NameExpr( odecl->get_name() )) );    // have to get address of object
          args.push_back( sinit->get_value() );
          // replace declaration with initialization
          stmts.push_back(new ExprStmt(std::list<Label>(), new UntypedExpr(new NameExpr("?=?"), args)));
        }

      delete init;
      odecl->set_init( 0 );
    } else {
      // no declaration statement
    }

    return declStmt;
  }

  ExprStmt *assignFromDecl( DeclStmt *declStmt )
  {
    ObjectDecl *decl;
    if ( (decl = dynamic_cast<ObjectDecl *>( declStmt->get_decl() )) != 0 )
      {
        SingleInit *init;
        if ( (init = dynamic_cast<SingleInit *>(decl->get_init())) != 0 )
          {
          }
      }

    return 0;
  }

  bool isDeclStmtP(Statement *stmt)
  {
    return ( dynamic_cast< DeclStmt *>(stmt) != 0 );
  }

  BasicInit::Classify::TypeKind BasicInit::Classify::type( Type *toClassify ) {
    if ( toClassify == 0 ) return NULL_T;

    if ( dynamic_cast< StructInstType * >(toClassify) ||
         dynamic_cast< UnionInstType * >(toClassify) ||
         dynamic_cast< ArrayType * >(toClassify)         )
      return COMPOUND_T;
    else
      return SINGLE_T;
  }

  BasicInit::Classify::InitKind BasicInit::Classify::initializer( Initializer *init) {
    if ( init == 0 ) return NULL_I;
    if ( dynamic_cast< ListInit * >(init) )
      return COMPOUND_I;
    if ( dynamic_cast< SingleInit * >(init) )
      return SINGLE_I;

    return NULL_I; // shouldn't be here anyways
  }

  NameInCollection *
  BasicInit::Classify::declaration( ObjectDecl *objdecl, SymTab::Indexer *index ) {
    assert ( index != 0 );

    ReferenceToType *reftype;
    if( (reftype = dynamic_cast< StructInstType * >( objdecl->get_type() )) != 0 ){
      StructDecl *strDecl = index->lookupStruct( reftype->get_name() );
      if ( strDecl != 0 ) {
        NameCollectionBuilder bld;
        NameCollector nc( bld );
        strDecl->accept( nc );
        NameInCollection *col = nc.get_builder().get_collection();
        nc.get_builder().set_collection( 0 );

        return col;
      } else
        throw( SemanticError( std::string("No structure of name: ") + reftype->get_name() ) );
    } else {
      throw(SemanticError( reftype->get_name() + std::string("is not a reference to type") ));
      return 0;
    }
  }

  std::list< Statement * >
  BasicInit::Classify::matchInit( NameInCollection *col,
                                  ObjectDecl *toInitialize,
                                  Initializer *init ) {
    assert ( col != 0 );

    std::list< Statement * > arranged(0); //( col->size() ); 
    std::fill( arranged.begin(), arranged.end(), (Statement *)0 );
    int current = 0;

    if ( init == 0 )
      // no initializer... shouldn't even bother... fix this. 
      return arranged;

    {
      ListInit *li = dynamic_cast< ListInit * >( init );

      if ( li != 0 ) {
        for( std::list<Initializer *>::iterator i = li->begin_initializers();
                                                         i != li->end_initializers();
              i++) {
          std::list<Expression *> d_orig = (*i)->get_designators();

          NameInCollection *corrsp; // corresponding element to this initializer
          if ( ! d_orig.empty() ) {
            // 1) has designators
            std::list<NameExpr *> des;
            std::transform( d_orig.begin(), d_orig.end(),
                            std::back_inserter( des ), cast_ptr<Expression, NameExpr > );

            for( std::list<NameExpr *>::iterator j = des.begin(); j != des.end(); j++ ) {
              // check for existence of the element

              if ( (corrsp = (*col)[ (*j)->get_name() ]) != 0 ) {
                // current++;
                SingleInit *sinit;
                if ( (sinit = dynamic_cast< SingleInit * >( *i )) != 0 )
                  arranged.push_back( constructAssgn( corrsp->get_name(), toInitialize, sinit ) );
                else
                  ; // recursive call to matchInit
              } else
                // error, member doesn't exist
                return arranged; // throw( 0 ); // XXX
            }
          } else {
            // 2) doesn't have designators
            if ( (corrsp = (*col)[ current++ ]) != 0 ) {
              SingleInit *sinit;
              if ( (sinit = dynamic_cast< SingleInit * >( *i )) != 0 )
                arranged.push_back( constructAssgn( corrsp->get_name(), toInitialize, sinit ) );
              else
                ; // recursive call to matchInit
            } else {
              // Shouldn't be here... probably too many elements in initializer?
            }
          }
        }
      }
    }

    return arranged;
  }

  Statement *BasicInit::Classify::constructAssgn( std::string membName, ObjectDecl *toInit, SingleInit *sinit ) {
    std::list< Expression * > args;
    args.push_back(new AddressExpr( new UntypedMemberExpr( membName, new NameExpr(toInit->get_name()) )));
    args.push_back( sinit->get_value() );
    Statement *ret = new ExprStmt(std::list<Label>(),
                                                    new UntypedExpr(new NameExpr("?=?"), args));
    return ret;
  }

  void BasicInit::build_statements( NameAssociation< Expression *, BreakInitializer > *assoc,
                                    std::string aggName, std::list< Statement *> &stmts ) {
    assert( assoc != 0 );
    static std::list< std::string > prefix;

    NameInCollection *col = assoc->get_collection();
    if ( col->isComposite() ) {
      VariousNames *vc = dynamic_cast< VariousNames * >( col ); 
      for( VariousNames::key_iterator it = vc->keys_begin(); it != vc->keys_end(); it++ ) {
        prefix.push_back( *it );
        if ( (*assoc)[ *it ] != 0 )
          build_statements( (*assoc)[ *it ], aggName, stmts );

        prefix.pop_back();
      }
    } else {
      SingleNameAssoc< Expression *, BreakInitializer > *sa = \
        dynamic_cast< SingleNameAssoc< Expression *, BreakInitializer > * >( assoc );
      assert( sa != 0 );

      Expression * rh = sa->get_data();

      if (rh != 0) {
        // construct assignment statement list
        Expression *lh = new NameExpr ( aggName );
        for ( std::list< std::string >::iterator i = prefix.begin(); i != prefix.end(); i++ )
          lh = new UntypedMemberExpr( *i, lh );

        std::list< Expression * > args;
        args.push_back( new AddressExpr(lh) );  args.push_back( rh );

        stmts.push_back( new ExprStmt(std::list<Label>(), 
                                               new UntypedExpr(new NameExpr("?=?"), args)) );
      }
    }

    return;
  }

} // namespace InitTweak