outputstream.h

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/*
 | Author: Michael Schmidt;
 |         Gunnar Jehl 
 |
 | ************************* SOFTWARE LICENSE AGREEMENT ***********************
 | This source code is published under the BSD License.
 |
 | See file 'LICENSE.txt' that comes with this distribution or
 | http://dbis.informatik.uni-freiburg.de/index.php?project=GCX/license.php
 | for the full license agreement.
 |
 | 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 OUTPUTSTREAM_H
#define OUTPUTSTREAM_H

#include <sstream>
#include <iostream>
#include "typeenums.h"
#include "expression.h"
#include "role.h"
#include "pathstepattribute.h"
#include "pathstepexpression.h"
#include "iostreamexception.h"

#if defined(LINUX) || defined(linux) || defined(_LINUX) || defined(_linux) || defined(__LINUX__) || defined(__linux__)

#define NEWLINE "\n"
#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__WINDOWS__)

#define NEWLINE "\n"
#else

#define NEWLINE "\n"
#endif

#define INDENT_TOKEN    " "

#define INDENT_MULTIPLICATOR    2

#define INDENT_SINGLE   1

#define INDENT_DOUBLE   2

using namespace std;

class OutputStream {

  public:
    OutputStream(OSTREAM_TYPE _type, const char *_arg);

     virtual ~ OutputStream();

    virtual void open() = 0;

    virtual void close() = 0;

    inline void decrementIndents(int n = INDENT_SINGLE) {
        indents = ((indents - n) > 0) ? (indents - n) : 0;
    } inline void incrementIndents(int n = INDENT_SINGLE) {
        indents = indents + n;
    }

    inline void resetIndents() {
        indents = 0;
    }

    virtual void writeIndents();

    virtual void write(const char *str) = 0;

    virtual void writeln(const char *str) = 0;

    virtual bool isWriteable() = 0;

    virtual void flush() = 0;

    inline const OSTREAM_TYPE getType() {
        return type;
    }

    inline const char *getArg() {
        return arg;
    }

  private:
    int indents;

  protected:
    OSTREAM_TYPE type;

    const char *arg;
};

inline OutputStream & operator<<(OutputStream & out, const char *str) {
    out.write(str);
    return out;
}

inline OutputStream & operator<<(OutputStream & out, const long double i) {
    std::ostringstream o;
    o << i;
    out.write(o.str().c_str());
    return out;
}

inline OutputStream & operator<<(OutputStream & out, const Expression & exp) {
    exp.print(out);
    return out;
}

inline OutputStream & operator<<(OutputStream & out,
                                 const PathStepAttribute & pstepattr) {
    pstepattr.print(out);
    return out;
}

inline OutputStream & operator<<(OutputStream & out, const Role & role) {
    role.print(out);
    return out;
}

#endif // OUTPUTSTREAM_H

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