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/******************************************************************************
* filemgr.h - definition of class FileMgr used for pooling file handles
*
* $Id: filemgr.h,v 1.14 2002/03/13 06:55:39 scribe Exp $
*
* Copyright 1998 CrossWire Bible Society (http://www.crosswire.org)
* CrossWire Bible Society
* P. O. Box 2528
* Tempe, AZ 85280-2528
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#ifndef FILEMGR_H
#define FILEMGR_H
#include <sys/stat.h>
#include <fcntl.h>
#include <defs.h>
class SWDLLEXPORT FileMgr;
class SWDLLEXPORT FileDesc
{
friend class FileMgr;
long offset;
int fd; // -77 closed;
FileMgr *parent;
FileDesc *next;
public:
FileDesc (FileMgr * parent, char *path, int mode, int perms, bool tryDowngrade);
virtual ~FileDesc ();
int getFd ();
char *path;
int mode;
int perms;
bool tryDowngrade;
};
class FileMgr
{
friend class FileDesc;
FileDesc *files;
int sysOpen (FileDesc * file);
public:
FileMgr (int maxFiles = 35);
~FileMgr ();
FileDesc *open (char *path, int mode, bool tryDowngrade);
FileDesc *open (char *path, int mode, int perms = S_IREAD | S_IWRITE, bool tryDowngrade = false);
void close (FileDesc *);
static signed char existsFile (const char *ipath, const char *ifileName = 0);
static signed char existsDir (const char *ipath, const char *idirName = 0);
// to truncate a file at its current position
// leaving byte at current possition intact
// deleting everything afterward.
signed char trunc (FileDesc *);
int maxFiles;
static FileMgr systemFileMgr;
};
#endif
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