filemgr.h

计算机英汉机器翻译系统中的英语词性标注方法实现

// FILEMGR.H - FileMgr Class Header

#ifndef FILEMGR_H
#define FILEMGR_H

#include "diskmgr.h"

const moOpen   = 1;
const moClosed = 2;
const moAlreadyOpen = 3;

const rsDeleted = 1; 
const rsOK      = 0; 


#define HEADSIZ 1024 /* Size of Header record */


class FileMgr : public DiskMgr
{
protected:
	char *m_szFileName; 
	int m_nFileHandle; 
	short m_nBlockSize;
	int m_nRecSize; 

	int m_nIsAlreadyOpen; // == 0 Already Open; == 1 Not open

	char *m_pszBlockBuffer; 
	long m_lBlockRecNum; 

	int create(void);

	int m_nFileMgrHdrSize; 

	virtual void read_data(void *block) {} 
	virtual void write_data(void *block) {} 
	virtual void create_file(void) {} 

	void write_head(int rec_aaea, long aaoa, long recno);

public:

	FileMgr(const char *fname, int m_nRecSize, int ctype, int mode = moOpen, int file_des = -1);
	~FileMgr(void);
    int open_file(void);
    void close_file(void);
	void insert(void);
	int amend(void);
	int erase(void);
	int read(long recno);
	int next(void);
	//int lock(long recno);
	//int unlock(void);
	//void lockfile(void)
	//{
	//	DiskMgr::lockfile(m_nFileHandle);
	//}
};

#endif