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/* Copyright (C) 2010 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* wchar_t versions of POSIX filesystem functions
*/
#ifndef INCLUDED_SYSDEP_FILESYSTEM
#define INCLUDED_SYSDEP_FILESYSTEM
#include "lib/os_path.h"
#include "lib/posix/posix_filesystem.h" // mode_t
//
// dirent.h
//
struct WDIR;
struct wdirent
{
// note: SUSv3 describes this as a "char array" but of unspecified size.
// we declare as a pointer to avoid having to copy the string.
wchar_t* d_name;
};
extern WDIR* wopendir(const OsPath& path);
extern wdirent* wreaddir(WDIR*);
// return status for the file returned by the last successful
// wreaddir call from the given directory stream.
// currently sets st_size, st_mode, and st_mtime; the rest are zeroed.
// non-portable, but considerably faster than stat(). used by dir_ForEachSortedEntry.
extern int wreaddir_stat_np(WDIR*, struct stat*);
extern int wclosedir(WDIR*);
//
// fcntl.h
//
// transfer directly to/from user's buffer.
// treated as a request to enable aio.
#ifndef O_DIRECT // i.e. Windows or OS X
#define O_DIRECT 0x10000000 // (value does not conflict with any current Win32 _O_* flags.)
#endif
// Win32 _wsopen_s does not open files in a manner compatible with waio.
// if its aio_read/aio_write are to be used, waio_open must (also) be called.
// calling both is possible but wasteful and unsafe, since it prevents
// file sharing restrictions, which are the only way to prevent
// exposing previous data as a side effect of waio_Preallocate.
// applications shouldn't mix aio and synchronous I/O anyway, so we
// want wopen to call either waio_open or _wsopen_s.
// since waio requires callers to respect the FILE_FLAG_NO_BUFFERING
// restrictions (sector alignment), and IRIX/BSD/Linux O_DIRECT imposes
// similar semantics, we treat that flag as a request to enable aio.
extern int wopen(const OsPath& pathname, int oflag);
extern int wopen(const OsPath& pathname, int oflag, mode_t mode);
extern int wclose(int fd);
//
// unistd.h
//
// waio requires offsets and sizes to be multiples of the sector size.
// to allow arbitrarily sized files, we truncate them after I/O.
// however, ftruncate cannot be used since it is also subject to the
// sector-alignment requirement. instead, the file must be closed and
// this function called.
LIB_API int wtruncate(const OsPath& pathname, off_t length);
LIB_API int wunlink(const OsPath& pathname);
LIB_API int wrmdir(const OsPath& path);
//
// stdio.h
//
LIB_API int wrename(const OsPath& pathnameOld, const OsPath& pathnameNew);
//
// stdlib.h
//
LIB_API OsPath wrealpath(const OsPath& pathname);
//
// sys/stat.h
//
LIB_API int wstat(const OsPath& pathname, struct stat* buf);
LIB_API int wmkdir(const OsPath& path, mode_t mode);
#endif // #ifndef INCLUDED_SYSDEP_FILESYSTEM
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