ctrump/parser/StructType.hpp

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/*
 Copyright (c) 2009, National Institute of Advanced Industrial Science
 and Technology.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 
   * Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
 
   * Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in
     the documentation and/or other materials provided with the
     distribution.
 
   * Neither the name of Fixstars Corporation nor the names of its
     contributors may be used to endorse or promote products derived
     from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef CFRONT_STRUCT_TYPE_HPP
#define CFRONT_STRUCT_TYPE_HPP

#include "FieldInclusionType.hpp"
#include <vector>

namespace cfront {


class StructDefinition : public SUDefinition {
public:
    StructDefinition(const std::string& name) : SUDefinition(name) {}
    virtual ~StructDefinition() {}

    virtual size_t getSize(const TargetInfo& targetInfo) const
    {
        /* XXX : Currently ignoring the bit-fields ... */
        size_t maxAlign = getAlign(targetInfo);
        size_t totalSize = 0;
        size_t offset = 0;
        const Fields& fields = this->getFields();
        for (Fields::const_iterator i = fields.begin();
             i != fields.end(); ++i) {
            size_t size = i->type->getSize(targetInfo);
            if (size <= maxAlign) {
                if (size + offset > maxAlign) {
                    size_t padSize = maxAlign - offset;
                    totalSize += padSize;
                    offset = 0;
                }
                totalSize += size;
                offset += size;
                offset %= maxAlign;
            } else {
                // like struct { int32_t a[3]; int64_t i; }
                size_t padSize = maxAlign - (size % maxAlign);
                totalSize += padSize + size;
                offset = 0;
            }
        }
        if (offset != 0) {
            totalSize += maxAlign - offset; // last padding.
        }
        return totalSize;
    }

    const Type* getNthFieldType(int n) const
    {
        return fields_.at(n).type;
    }
    
};

class StructType : public FieldInclusionType {
public:
    StructType(SUDefinition* def) : FieldInclusionType(def) {}
    virtual ~StructType() {}

    virtual StructType* clone() const
    {
        return new StructType(*this);
    }

#ifdef PARSER_DEBUG
    virtual std::string toString() const
    {
        std::stringstream ss;
        ss << "struct ";
        return ss.str();
    }
#endif

protected:

};

} // namespace cfront

#endif


/*
 * Local Variables:
 * mode: C++
 * c-basic-offset: 4
 * indent-tabs-mode: nil
 * End:
 */

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