fio.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: fio.h,v 1.3.48.3 2004/07/09 01:44:42 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
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 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
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 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
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 * use your version of this file under the terms of any one of the
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 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
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 * ENJOYMENT OR NON-INFRINGEMENT.
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 * Technology Compatibility Kit Test Suite(s) Location:
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 * Contributor(s):
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 * ***** END LICENSE BLOCK ***** */

#ifndef _WINFIO_H_
#define _WINFIO_H_

#include "hlxclib/sys/stat.h"
#include "hlxclib/io.h"
#include <stdlib.h>

#include "hlxclib/windows.h" // for GetFileSize

#include "hlxclib/fcntl.h"

#include "hxassert.h"
#include "bio.h"

typedef unsigned short mode_t;

class FileIO : public IO
{
public:
	       		FileIO(const char* file, LONG32 flags, 
			       mode_t mode = 0666);
			~FileIO();
    virtual LONG32	close();
    virtual LONG32	read(void* buf, LONG32 size);
    virtual LONG32	write(const void* buf, LONG32 size);
    virtual off_t	seek(off_t off, LONG32 whence);
    virtual LONG32	error();
    virtual LONG32	flags();
    virtual off_t	file_size();

    static void		local_path(char* path);
    static const enum { MAXPATH = 1024 };
    static const char 	PATH_SEP;
    static int		is_directory(char* path);
    static const char* 	NEWLINE;

protected:
    int 	fd;
    LONG32	err;
    LONG32	_flags;
};

#if !defined (WIN32_PLATFORM_PSPC)
inline
FileIO::FileIO(const char* file, LONG32 flags, mode_t mode) 
{
    err = 0;
    fd = ::_open(file, HX_SAFEINT(flags), mode);
    _flags = flags;
    if (fd < 0)
	err = errno;
}

inline LONG32
FileIO::close() 
{
    LONG32 ret = ::_close(fd);
    fd = -1;
    if (ret < 0)
	err = errno;
    return ret;
}

inline
FileIO::~FileIO() 
{
    if (fd >= 0)
	close();
    fd = -1;
}

inline off_t
FileIO::seek(off_t off, LONG32 whence) 
{
    off_t ret = ::_lseek(fd, off, HX_SAFEINT(whence));
    if (ret < 0)
	err = errno;
    return ret;
}

inline LONG32
FileIO::read(void * buf, LONG32 len) 
{
    int ret = ::_read(fd, buf, HX_SAFEINT(len));
    if (ret < 0)
	err = errno;
    return ret;
}

inline LONG32
FileIO::write(const void * buf, LONG32 len) 
{
    LONG32 ret = ::_write(fd, buf, HX_SAFEINT(len));
    if (ret < 0)
	err = errno;
    return ret;
}

inline off_t
FileIO::file_size()
{
#ifdef _WIN32 
    // fstat always returns a size of zero for network files
    // under win95, so we use the proper Win32 api here...
    return (off_t)GetFileSize((HANDLE)_get_osfhandle(fd),NULL);
#else
    struct stat st;
    if (fstat(fd, &st) < 0)
    {
	err = errno;
	return (off_t)-1;
    }
    return st.st_size;
#endif // 0
}

inline LONG32
FileIO::error()
{
    return err;
}

inline LONG32
FileIO::flags()
{
    return _flags;
}

inline void
FileIO::local_path(char* path)
{
}

inline int
FileIO::is_directory(char* path)
{
#ifdef _WINCE
    DWORD res = GetFileAttributes(Unicode(path));
    return (res == 0xffffffff) ? 0 : res & FILE_ATTRIBUTE_DIRECTORY;
#else
    struct stat st;

    if (stat(path, &st) < 0)
    {
	return 0;
    }

    return st.st_mode & S_IFDIR;
#endif
}
#endif /* !defined (WIN32_PLATFORM_PSPC) */
#endif /* _WINFIO_H_ */