/*
 * Copyright 2013, Haiku, Inc. All rights reserved.
 * Copyright (c) 2003-4 Kian Duffy <myob@users.sourceforge.net>
 * Parts Copyright (C) 1998,99 Kazuho Okui and Takashi Murai. 
 *
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Kian Duffy, myob@users.sourceforge.net
 *              Siarzhuk Zharski, zharik@gmx.li
 */
#ifndef TERMPARSE_H
#define TERMPARSE_H


#include "TermConst.h"

#include <Handler.h>
#include <OS.h>


#define READ_BUF_SIZE 2048
        // pty read buffer size
#define MIN_PTY_BUFFER_SPACE    16
        // minimal space left before the reader tries to read more
#define ESC_PARSER_BUFFER_SIZE  64
        // size of the parser buffer


class TerminalBuffer;

class TermParse : public BHandler {
public:
        TermParse(int fd);
        ~TermParse();

        status_t StartThreads(TerminalBuffer *view);
        status_t StopThreads();

private:
        inline uchar _NextParseChar();

        // Initialize TermParse and PtyReader thread.
        status_t _InitTermParse();
        status_t _InitPtyReader();

        void _StopTermParse();
        void _StopPtyReader();

        int32 EscParse();
        int32 PtyReader();

        void DumpState(int *groundtable, int *parsestate, uchar c);

        static int32 _ptyreader_thread(void *);
        static int32 _escparse_thread(void *);

        status_t _ReadParserBuffer();

        void _DeviceStatusReport(int n);
        void _DecReqTermParms(int value);
        void _DecPrivateModeSet(int value);
        void _DecPrivateModeReset(int value);
        void _DecPrivateModeRequest(int value);
        int* _GuessGroundTable(int encoding);
        void _ProcessOperatingSystemControls(uchar* params);
        void _WriteReply(BString &reply);

        int fFd;

        thread_id fParseThread;
        thread_id fReaderThread;
        sem_id fReaderSem;
        sem_id fReaderLocker;

        uint fBufferPosition;
        uchar fReadBuffer[READ_BUF_SIZE];
        int32 fReadBufferSize;

        uchar fParserBuffer[ESC_PARSER_BUFFER_SIZE];
        int32 fParserBufferSize;
        int32 fParserBufferOffset;

        TerminalBuffer *fBuffer;

        bool fQuitting;
};

#endif // TERMPARSE_H