hasherezade-bearparser/parser/FileBuffer.h

#pragma once
#include <QtCore>

#include "ByteBuffer.h"

const bufsize_t FILE_MAXSIZE = BUFSIZE_MAX;
const bufsize_t FILEVIEW_MAXSIZE = (1024*1024*400); //419mb

class FileBufferException : public CustomException
{
public:
    FileBufferException(const QString info) : CustomException(info) {}
};


class FileBuffer {
public:
    static ByteBuffer* read(QString &file, bufsize_t minBufSize); //throws exceptions
    static bufsize_t getReadableSize(QFile &fIn);

    static bufsize_t getReadableSize(QString &path);
    static bufsize_t dump(QString fileName, AbstractByteBuffer &buf, bool allowExceptions = false);
};


class FileView : public AbstractByteBuffer, public FileBuffer
{
public:
    FileView(QString &fileName, bufsize_t maxSize = FILE_MAXSIZE); //throws exceptions
    virtual ~FileView();

    virtual bufsize_t getContentSize() { return mappedSize; }
    virtual BYTE* getContent() { return mappedContent; }
    bufsize_t getMappableSize(QFile &fIn);

protected:
    QFile fIn;

    BYTE *mappedContent;
    bufsize_t mappedSize;
    qint64 fileSize;
};