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/* filewrap.h */

/* File system-call wrappers */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
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 * Copyright 2010 Rob Swindell - http://www.synchro.net/copyright.html		*
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 *																			*
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 * This library is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU Lesser General Public License		*
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 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
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 * See the GNU Lesser General Public License for more details: lgpl.txt or	*
 * http://www.fsf.org/copyleft/lesser.html									*
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 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

#ifndef _FILEWRAP_H
#define _FILEWRAP_H

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#include "wrapdll.h"	/* DLLEXPORT and DLLCALL */

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#include <sys/stat.h>	/* S_IREAD and S_IWRITE (for use with sopen) */
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#include <stdio.h>
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#if defined(__unix__)
	#include <unistd.h>	/* read, write, close, ftruncate, lseek, etc. */
#endif

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#if defined(_WIN32) || defined(__BORLANDC__)
	#include <io.h>
#endif

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#include <fcntl.h>		/* O_RDONLY, O_CREAT, etc. */

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/**********/
/* Macros */
/**********/

#if defined(_WIN32)

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	#include <windows.h>		/* OF_SHARE_ */
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	#include <share.h>			/* SH_DENY */
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	#ifndef SH_DENYNO
	#define SH_DENYNO			OF_SHARE_DENY_NONE
	#define SH_DENYWR			OF_SHARE_DENY_WRITE
	#define SH_DENYRW			OF_SHARE_EXCLUSIVE
	#endif

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	#ifndef SH_COMPAT
	#define SH_COMPAT			0
	#endif

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#elif defined(__unix__)

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	#ifdef __solaris__
		#define LOCK_NB	1
		#define LOCK_SH 2
		#define LOCK_EX 4
	#endif
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	#ifdef __QNX__
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		#include <share.h>
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		#define L_SET	SEEK_SET
	#else
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		#ifndef O_TEXT
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		#define O_TEXT		0		/* all files in binary mode on Unix */
		#define O_BINARY	0		/* all files in binary mode on Unix */
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		#endif
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		#undef	O_DENYNONE
		#define O_DENYNONE  (1<<31)	/* req'd for Baja/nopen compatibility */

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		#define SH_DENYNO	2          /* no locks */
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		#ifdef F_SANEWRLCKNO
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			#define SH_DENYRW	F_SANEWRLCKNO	   /* exclusive lock */
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		#else
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			#define SH_DENYRW	F_WRLCK	   /* exclusive lock */
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		#endif
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		#ifdef F_SANERDLCKNO
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			#define SH_DENYWR   F_SANERDLCKNO    /* shareable lock */
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		#else
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			#define SH_DENYWR   F_RDLCK    /* shareable lock */
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		#endif
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		#ifndef SH_COMPAT
			#define SH_COMPAT			0
		#endif
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	#endif
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	#ifndef DEFFILEMODE
	#define DELFILEMODE			(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
	#endif

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	#define chsize(fd,size)		ftruncate(fd,size)
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	#define _chsize_s(fd,size)	ftruncate(fd,size)		/* supports 64-bit size */
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	#define tell(fd)			lseek(fd,0,SEEK_CUR)
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	#define eof(fd)				(tell(fd)==filelength(fd))
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#elif defined(__OS2__)

	#include <share.h>			/* SH_DENY */

#endif

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#ifndef DEFFILEMODE
#define DEFFILEMODE			(S_IREAD|S_IWRITE)
#endif

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/* Standard file descriptors.  */
#ifndef STDIN_FILENO
#define STDIN_FILENO    0       /* Standard input */
#define STDOUT_FILENO   1       /* Standard output */
#define STDERR_FILENO   2       /* Standard error output */
#endif

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#ifndef O_DENYNONE
#define O_DENYNONE		SH_DENYNO
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#endif

/**************/
/* Prototypes */
/**************/

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#if defined(__cplusplus)
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extern "C" {
#endif

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#if !defined(__BORLANDC__) && !defined(__WATCOMC__)
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	DLLEXPORT int	DLLCALL	lock(int fd, long pos, long len);
	DLLEXPORT int	DLLCALL unlock(int fd, long pos, long len);
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#endif

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#if !defined(__BORLANDC__) && defined(__unix__)
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	DLLEXPORT int		DLLCALL sopen(const char* fn, int sh_access, int share, ...);
	DLLEXPORT long		DLLCALL filelength(int fd);
	DLLEXPORT int64_t	DLLCALL _filelengthi64(int fd);
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#endif

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#if defined(__unix__)
	DLLEXPORT FILE * DLLCALL _fsopen(char *pszFilename, char *pszMode, int shmode);
#endif

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DLLEXPORT time_t	DLLCALL filetime(int fd);

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#if defined(__cplusplus)
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}
#endif

#endif	/* Don't add anything after this line */