TPEFASpaceSectionReader.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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    copy of this software and associated documentation files (the "Software"),
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    all copies or substantial portions of the Software.
 
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/**
 * @file TPEFASpaceSectionReader.cc
 *
 * Definition of TPEFASpaceSectionReader class.
 *
 * @author Mikael Lepistö 2003 (tmlepist-no.spam-cs.tut.fi)
 *
 * @note rating: yellow
 */
 
#include "TPEFASpaceSectionReader.hh"
#include "ASpaceSection.hh"
#include "SafePointer.hh"
#include "Exception.hh"
#include "ReferenceKey.hh"
#include "SectionReader.hh"
#include "TPEFBaseType.hh"
#include "ASpaceElement.hh"
#include "BinaryStream.hh"
 
namespace TPEF {
 
using ReferenceManager::SafePointer;
using ReferenceManager::SectionIndexKey;
using ReferenceManager::SectionOffsetKey;
 
TPEFASpaceSectionReader TPEFASpaceSectionReader::proto_;
 
/**
 * Constructor.
 *
 * Registers itself to SectionReader.
 */
TPEFASpaceSectionReader::TPEFASpaceSectionReader() : TPEFSectionReader() {
    SectionReader::registerSectionReader(this);
}
 
/**
 * Destructor.
 */
TPEFASpaceSectionReader::~TPEFASpaceSectionReader() {
}
 
/**
 * Returns the type of section it is meant to read.
 *
 * @return The type of section it can read.
 */
Section::SectionType
TPEFASpaceSectionReader::type() const {
    return Section::ST_ADDRSP;
}
 
/**
 * Reads section data from TPEF binary file.
 *
 * @param stream Stream to be read from.
 * @param section Section where the information is to be stored.
 * @exception UnreachableStream If reading of section fails.
 * @exception KeyAlreadyExists Key was in use when trying to register object.
 * @exception EndOfFile If end of file were reached while it shouldn't.
 * @exception OutOfRange Some of read value were out of range.
 * @exception WrongSubclass Some class couldn't do what it was asked for.
 * @exception UnexpectedValue If there was unexpected value when reading.
 */
void
TPEFASpaceSectionReader::readData(
    BinaryStream& stream, Section* section) const {
    // base classes implementation must be called with these.
    TPEFSectionReader::readData(stream, section);
 
    // just being paranoid...
    ASpaceSection* aSpaceSection =
        dynamic_cast<ASpaceSection*>(section);
    assert(aSpaceSection != NULL);
 
    std::set<Byte> alreadyUsedIds;
 
    bool undefFound = false;
 
    // check that link section is defined properly
    assert(header().linkId != 0);
 
    if (!section->noBits()) {
        // start of first element
        SectionOffset elementStart = header().bodyOffset;
 
        while (elementStart + header().elementSize <=
               header().bodyOffset + header().bodyLength) {
 
            ASpaceElement *elem = new ASpaceElement();
 
            // first byte of address space element is a unique identifier
            Byte id = stream.readByte();
 
            // check that the identifier is really unique
            if (alreadyUsedIds.find(id) != alreadyUsedIds.end()) {
                bool twoASpaceElementsWithSameId = false;
                assert(twoASpaceElementsWithSameId);
            } else {
                alreadyUsedIds.insert(id);
            }
 
            SectionIndexKey sectionIndexKey(
                dynamic_cast<TPEFReader*>(parent())->aSpaceId(), id);
            SafePointer::addObjectReference(sectionIndexKey, elem);
 
            elem->setMAU(stream.readByte());
            elem->setAlign(stream.readByte());
            elem->setWordSize(stream.readByte());
 
            SectionOffsetKey nameSectionOffset(
                header().linkId, stream.readWord());
 
            elem->setName(CREATE_SAFEPOINTER(nameSectionOffset));
 
            // check undef aspace
            if (id == 0) {
                assert(elem->MAU() == 0);
                assert(elem->align() == 0);
                assert(elem->wordSize() == 0);
                assert(nameSectionOffset.offset() == 0);
                aSpaceSection->setUndefinedASpace(elem);
                undefFound = true;
            }
 
            section->addElement(elem);
 
            elementStart += header().elementSize;
            stream.setReadPosition(elementStart);
        }
    }
 
    // if there was no undef aspace create it (if nobits flag is set)
    if (!undefFound) {
        ASpaceElement *elem = new ASpaceElement();
        elem->setMAU(0);
        elem->setAlign(0);
        elem->setWordSize(0);
        section->addElement(elem);
        aSpaceSection->setUndefinedASpace(elem);
    }
}
}