GPRGuardEncoding.cc

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/*
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/**
 * @file GPRGuardEncoding.cc
 *
 * Implementation of GPRGuardEncoding class.
 *
 * @author Lasse Laasonen 2005 (lasse.laasonen-no.spam-tut.fi)
 * @note rating: red
 */
 
#include <string>
 
#include "GPRGuardEncoding.hh"
#include "GuardField.hh"
#include "ObjectState.hh"
 
using std::string;
 
const std::string GPRGuardEncoding::OSNAME_GPR_GUARD_ENCODING =
    "gpr_guard_enc";
const std::string GPRGuardEncoding::OSKEY_RF_NAME = "rf_name";
const std::string GPRGuardEncoding::OSKEY_REGISTER_INDEX = "reg_index";
 
/**
 * The constructor.
 *
 * Creates a guard encoding and Registers it into the given guard field
 * automatically. The guard expression is identified by the name of register
 * file, the index of the GPR and the "invert" flag, all given as parameters.
 *
 * @param regFile Name of the register file.
 * @param index The index the GPR.
 * @param inverted The "invert" flag.
 * @param encoding The control code of the guard expression.
 * @param parent The parent guard field.
 * @exception ObjectAlreadyExists If the guard expression is already encoded
 *                                in the parent field, or if the given control
 *                                code is already assigned to another guard
 *                                expression.
 */
GPRGuardEncoding::GPRGuardEncoding(
    const std::string& regFile, int index, bool inverted, unsigned int encoding,
    GuardField& parent)
    : GuardEncoding(inverted, encoding), regFile_(regFile), index_(index) {
    parent.addGuardEncoding(*this);
    setParent(&parent);
}
 
/**
 * The constructor.
 *
 * Loads the state of the object from the given ObjectState instance.
 *
 * @param state The ObjectState instance.
 * @param parent The parent guard field.
 * @exception ObjectStateLoadingException If an error occurs while loading the
 *                                        state.
 * @exception ObjectAlreadyExists If the guard expression is already encoded
 *                                in the parent field, or if the given control
 *                                code is already assigned to another guard
 *                                expression.
 */
GPRGuardEncoding::GPRGuardEncoding(const ObjectState* state, GuardField& parent)
    : GuardEncoding(state), regFile_(""), index_(0) {
    const string procName = "GPRGuardEncoding::GPRGuardEncoding";
 
    if (state->name() != OSNAME_GPR_GUARD_ENCODING) {
    throw ObjectStateLoadingException(__FILE__, __LINE__, procName);
    }
 
    try {
    regFile_ = state->stringAttribute(OSKEY_RF_NAME);
    index_ = state->intAttribute(OSKEY_REGISTER_INDEX);
    } catch (const Exception& exception) {
    throw ObjectStateLoadingException(
        __FILE__, __LINE__, procName, exception.errorMessage());
    }
 
    parent.addGuardEncoding(*this);
    setParent(&parent);
}
 
/**
 * The destructor.
 */
GPRGuardEncoding::~GPRGuardEncoding() {
    GuardField* parent = this->parent();
    setParent(NULL);
    parent->removeGuardEncoding(*this);
}
 
 
/**
 * Returns the name of the register file that contains the GPR of this guard
 * expression.
 *
 * @return The name of the register file.
 */
std::string
GPRGuardEncoding::registerFile() const {
    return regFile_;
}
 
 
/**
 * Returns the index of the GPR of this guard expression.
 *
 * @return The index of the GPR.
 */
int
GPRGuardEncoding::registerIndex() const {
    return index_;
}
 
 
/**
 * Saves the state of the object to an ObjectState instance.
 *
 * @return The newly created ObjectState instance.
 */
ObjectState*
GPRGuardEncoding::saveState() const {
    ObjectState* state = GuardEncoding::saveState();
    state->setName(OSNAME_GPR_GUARD_ENCODING);
    state->setAttribute(OSKEY_RF_NAME, registerFile());
    state->setAttribute(OSKEY_REGISTER_INDEX, registerIndex());
    return state;
}