BinaryStream.icc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
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    the rights to use, copy, modify, merge, publish, distribute, sublicense,
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    Software is furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
 
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/**
 * @file BinaryStream.icc
 *
 * Implementation of BinaryStream class inline functions.
 *
 * @author Ari Metsähalme 2003 (ari.metsahalme-no.spam-tut.fi)
 * @note reviewed 7 August 2003 by pj, am, jn, ao, rl
 *
 * @note rating: yellow
 */
 
#include "Exception.hh"
#include "BinaryStream.hh"
 
namespace TPEF {
 
/**
 * Reads a single byte from the stream.
 *
 * Opens the stream if it's not opened yet.
 *
 * @return One byte from the stream.
 * @exception UnreachableStream If stream is bad.
 * @exception EndOfFile If end of file was reached unexpectedly.
 */
inline Byte
BinaryStream::getByte() {
    if (!iStream_.is_open()) {
        openInput(fileName_);
    }
    
    if (iStream_.bad()) {
        throw UnreachableStream(__FILE__, __LINE__, __func__, fileName_);
    }
    if (iStream_.eof()) {
        throw EndOfFile(__FILE__, __LINE__, __func__, fileName_);
    }
 
    Byte result = iStream_.get();
 
    if (iStream_.bad()) {
        throw UnreachableStream(__FILE__, __LINE__, __func__, fileName_);
    }
 
    return result;
}
 
/**
 * Writes a single byte to the stream.
 *
 * Opens the stream if it's not opened yet.
 *
 * @note If write position is set past the end of file, putByte will throw
 *       UnreachableStream exception.
 *
 * @param byte The byte to write to the stream.
 * @exception UnreachableStream If stream is bad.
 * @exception WritePastEOF If write position is set past the end of
 *            file and writing is attempted.
 */
inline void
BinaryStream::putByte(Byte byte) {
    if (extOStream_ != NULL) {
        extOStream_->put(byte);
        return;
    }
 
    if (!oStream_.is_open()) {
        openOutput(fileName_);
    }
 
    if (oStream_.bad()) {
        throw UnreachableStream(__FILE__, __LINE__, __func__, fileName_);
    }
 
    unsigned int writePos = oStream_.tellp();
    oStream_.seekp(0, std::ios::end);
    unsigned int eofPos = oStream_.tellp();
 
    if (writePos > eofPos) {
        oStream_.seekp(writePos);
        throw WritePastEOF(__FILE__, __LINE__, __func__, fileName_);
    }
 
    oStream_.seekp(writePos);
    oStream_.put(byte);
 
    if (oStream_.bad()) {
        throw UnreachableStream(__FILE__, __LINE__, __func__, fileName_);
    }
}
}