/*
 * Copyright 2008, Haiku.
 * Distributed under the terms of the MIT license.
 *
 * Authors:
 *              Michael Pfeiffer <laplace@users.sourceforge.net>
 */

#include "CharacterClasses.h"
#include "Scanner.h"

#include <stdio.h>

int FileBuffer::Read()
{
        if (fIndex >= fSize) {
                fSize = fFile->Read(fBuffer, kReadBufferSize);
                fIndex = 0;
        }
        if (fSize <= 0) {
                return -1;
        }
        return (int)fBuffer[fIndex ++];
}

PPDFile::PPDFile(const char* file, PPDFile* previousFile)
        : fFileName(file)
        , fFile(file, B_READ_ONLY)
        , fPreviousFile(previousFile)
        , fCurrentPosition(0, 1)
        , fCurrentChar(-1)
        , fBuffer(&fFile)
{
}

PPDFile::~PPDFile()
{
        // nothing to do
}

status_t PPDFile::InitCheck()
{
        return fFile.InitCheck();
}

int PPDFile::GetCurrentChar()
{
        return fCurrentChar;
}

void PPDFile::NextChar() {
        fCurrentChar = fBuffer.Read();
        if (fCurrentChar != -1) {
#if TRACE_SCANNER
                fprintf(stderr, "%c ", fCurrentChar);
#endif
                if (fCurrentChar == kCr) {
                        fCurrentPosition.x = 0;
                        fCurrentPosition.y ++;
                } else {
                        fCurrentPosition.x ++;
                }
        }
}

Position PPDFile::GetPosition()
{
        return fCurrentPosition;
}

PPDFile* PPDFile::GetPreviousFile()
{
        return fPreviousFile;
}

const char* PPDFile::GetFileName()
{
        return fFileName.String();
}