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physfs/src/platform_windows.c

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/*
* Windows support routines for PhysicsFS.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon, and made sane by Gregory S. Read.
*/
#define __PHYSICSFS_INTERNAL__
#include "physfs_platforms.h"
#ifdef PHYSFS_PLATFORM_WINDOWS
/* Forcibly disable UNICODE macro, since we manage this ourselves. */
#ifdef UNICODE
#undef UNICODE
#endif
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#include <userenv.h>
#include <dbt.h>
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include "physfs_internal.h"
#define LOWORDER_UINT64(pos) ((PHYSFS_uint32) (pos & 0xFFFFFFFF))
#define HIGHORDER_UINT64(pos) ((PHYSFS_uint32) ((pos >> 32) & 0xFFFFFFFF))
/*
* Users without the platform SDK don't have this defined. The original docs
* for SetFilePointer() just said to compare with 0xFFFFFFFF, so this should
* work as desired.
*/
#define PHYSFS_INVALID_SET_FILE_POINTER 0xFFFFFFFF
/* just in case... */
#define PHYSFS_INVALID_FILE_ATTRIBUTES 0xFFFFFFFF
/* Not defined before the Vista SDK. */
#define PHYSFS_IO_REPARSE_TAG_SYMLINK 0xA000000C
#define UTF8_TO_UNICODE_STACK_MACRO(w_assignto, str) { \
if (str == NULL) \
w_assignto = NULL; \
else { \
const PHYSFS_uint64 len = (PHYSFS_uint64) ((strlen(str) + 1) * 2); \
w_assignto = (WCHAR *) __PHYSFS_smallAlloc(len); \
if (w_assignto != NULL) \
PHYSFS_utf8ToUcs2(str, (PHYSFS_uint16 *) w_assignto, len); \
} \
} \
#ifndef _MSC_VER
#define _snprintf snprintf
#endif
/* !!! FIXME: this is wrong for UTF-16. */
static PHYSFS_uint64 wStrLen(const WCHAR *wstr)
{
PHYSFS_uint64 len = 0;
while (*(wstr++))
len++;
return len;
} /* wStrLen */
static char *unicodeToUtf8Heap(const WCHAR *w_str)
{
char *retval = NULL;
if (w_str != NULL)
{
void *ptr = NULL;
const PHYSFS_uint64 len = (wStrLen(w_str) * 4) + 1;
retval = allocator.Malloc(len);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
/* !!! FIXME: utf-16. */
PHYSFS_utf8FromUcs2((const PHYSFS_uint16 *) w_str, retval, len);
ptr = allocator.Realloc(retval, strlen(retval) + 1); /* shrink. */
if (ptr != NULL)
retval = (char *) ptr;
} /* if */
return retval;
} /* unicodeToUtf8Heap */
/* !!! FIXME: do we really need readonly? If not, do we need this struct? */
typedef struct
{
HANDLE handle;
int readonly;
} WinApiFile;
const char *__PHYSFS_platformDirSeparator = "\\";
static char *userDir = NULL;
static HANDLE libUserEnv = NULL;
static HANDLE detectCDThreadHandle = NULL;
static HWND detectCDHwnd = 0;
static volatile int initialDiscDetectionComplete = 0;
static volatile DWORD drivesWithMediaBitmap = 0;
/*
* Figure out what the last failing Windows API call was, and
* generate a human-readable string for the error message.
*
* The return value is a static buffer that is overwritten with
* each call to this function.
*/
static const char *winApiStrErrorByNum(const DWORD err)
{
static char utf8buf[255];
WCHAR msgbuf[255];
WCHAR *ptr;
DWORD rc = FormatMessageW(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
msgbuf, __PHYSFS_ARRAYLEN(msgbuf),
NULL);
if (rc == 0)
msgbuf[0] = '\0'; /* oh well. */
/* chop off newlines. */
for (ptr = msgbuf; *ptr; ptr++)
{
if ((*ptr == '\n') || (*ptr == '\r'))
{
*ptr = '\0';
break;
} /* if */
} /* for */
/* may truncate, but oh well. */
PHYSFS_utf8FromUcs2((PHYSFS_uint16 *) msgbuf, utf8buf, sizeof (utf8buf));
return ((const char *) utf8buf);
} /* winApiStrErrorByNum */
static inline const char *winApiStrError(void)
{
return winApiStrErrorByNum(GetLastError());
} /* winApiStrError */
/*
* On success, module-scope variable (userDir) will have a pointer to
* a malloc()'d string of the user's profile dir, and a non-zero value is
* returned. If we can't determine the profile dir, (userDir) will
* be NULL, and zero is returned.
*/
static int determineUserDir(void)
{
typedef BOOL (WINAPI *fnGetUserProfDirW)(HANDLE, LPWSTR, LPDWORD);
fnGetUserProfDirW pGetDir = NULL;
HANDLE accessToken = NULL; /* Security handle to process */
if (userDir != NULL)
return 1; /* already good to go. */
pGetDir = (fnGetUserProfDirW)
GetProcAddress(libUserEnv, "GetUserProfileDirectoryW");
BAIL_IF_MACRO(pGetDir == NULL, winApiStrError(), 0);
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &accessToken))
BAIL_MACRO(winApiStrError(), 0);
else
{
DWORD psize = 0;
WCHAR dummy = 0;
LPWSTR wstr = NULL;
BOOL rc = 0;
/*
* Should fail. Will write the size of the profile path in
* psize. Also note that the second parameter can't be
* NULL or the function fails.
*/
rc = pGetDir(accessToken, &dummy, &psize);
assert(!rc); /* !!! FIXME: handle this gracefully. */
(void) rc;
/* Allocate memory for the profile directory */
wstr = (LPWSTR) __PHYSFS_smallAlloc(psize * sizeof (WCHAR));
if (wstr != NULL)
{
if (pGetDir(accessToken, wstr, &psize))
userDir = unicodeToUtf8Heap(wstr);
__PHYSFS_smallFree(wstr);
} /* if */
CloseHandle(accessToken);
} /* if */
return 1; /* We made it: hit the showers. */
} /* determineUserDir */
typedef BOOL (WINAPI *fnSTEM)(DWORD, LPDWORD b);
static DWORD pollDiscDrives(void)
{
/* Try to use SetThreadErrorMode(), which showed up in Windows 7. */
HANDLE lib = LoadLibraryA("kernel32.dll");
fnSTEM stem = NULL;
char drive[4] = { 'x', ':', '\\', '\0' };
DWORD oldErrorMode = 0;
DWORD drives = 0;
DWORD i;
if (lib)
stem = (fnSTEM) GetProcAddress(lib, "SetThreadErrorMode");
if (stem)
stem(SEM_FAILCRITICALERRORS, &oldErrorMode);
else
oldErrorMode = SetErrorMode(SEM_FAILCRITICALERRORS);
/* Do detection. This may block if a disc is spinning up. */
for (i = 'A'; i <= 'Z'; i++)
{
DWORD tmp = 0;
drive[0] = (char) i;
if (GetDriveTypeA(drive) != DRIVE_CDROM)
continue;
/* If this function succeeds, there's media in the drive */
if (GetVolumeInformationA(drive, NULL, 0, NULL, NULL, &tmp, NULL, 0))
drives |= (1 << (i - 'A'));
} /* for */
if (stem)
stem(oldErrorMode, NULL);
else
SetErrorMode(oldErrorMode);
if (lib)
FreeLibrary(lib);
return drives;
} /* pollDiscDrives */
static LRESULT CALLBACK detectCDWndProc(HWND hwnd, UINT msg,
WPARAM wp, LPARAM lparam)
{
PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR) lparam;
PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME) lparam;
const int removed = (wp == DBT_DEVICEREMOVECOMPLETE);
if (msg == WM_DESTROY)
return 0;
else if ((msg != WM_DEVICECHANGE) ||
((wp != DBT_DEVICEARRIVAL) && (wp != DBT_DEVICEREMOVECOMPLETE)) ||
(lpdb->dbch_devicetype != DBT_DEVTYP_VOLUME) ||
((lpdbv->dbcv_flags & DBTF_MEDIA) == 0))
{
return DefWindowProcW(hwnd, msg, wp, lparam);
} /* else if */
if (removed)
drivesWithMediaBitmap &= ~lpdbv->dbcv_unitmask;
else
drivesWithMediaBitmap |= lpdbv->dbcv_unitmask;
return TRUE;
} /* detectCDWndProc */
static DWORD WINAPI detectCDThread(LPVOID lpParameter)
{
const char *classname = "PhysicsFSDetectCDCatcher";
const char *winname = "PhysicsFSDetectCDMsgWindow";
HINSTANCE hInstance = GetModuleHandleW(NULL);
ATOM class_atom = 0;
WNDCLASSEXA wce;
MSG msg;
memset(&wce, '\0', sizeof (wce));
wce.cbSize = sizeof (wce);
wce.lpfnWndProc = detectCDWndProc;
wce.lpszClassName = classname;
wce.hInstance = hInstance;
class_atom = RegisterClassExA(&wce);
if (class_atom == 0)
{
initialDiscDetectionComplete = 1; /* let main thread go on. */
return 0;
} /* if */
detectCDHwnd = CreateWindowExA(0, classname, winname, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, HWND_DESKTOP, NULL, hInstance, NULL);
if (detectCDHwnd == NULL)
{
initialDiscDetectionComplete = 1; /* let main thread go on. */
UnregisterClassA(classname, hInstance);
return 0;
} /* if */
/* We'll get events when discs come and go from now on. */
/* Do initial detection, possibly blocking awhile... */
drivesWithMediaBitmap = pollDiscDrives();
initialDiscDetectionComplete = 1; /* let main thread go on. */
do
{
const BOOL rc = GetMessageW(&msg, detectCDHwnd, 0, 0);
if ((rc == 0) || (rc == -1))
break; /* don't care if WM_QUIT or error break this loop. */
TranslateMessage(&msg);
DispatchMessageW(&msg);
} while (1);
/* we've been asked to quit. */
DestroyWindow(detectCDHwnd);
do
{
const BOOL rc = GetMessage(&msg, detectCDHwnd, 0, 0);
if ((rc == 0) || (rc == -1))
break;
TranslateMessage(&msg);
DispatchMessageW(&msg);
} while (1);
UnregisterClassA(classname, hInstance);
return 0;
} /* detectCDThread */
void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
{
char drive_str[4] = { 'x', ':', '\\', '\0' };
DWORD drives = 0;
DWORD i;
/*
* If you poll a drive while a user is inserting a disc, the OS will
* block this thread until the drive has spun up. So we swallow the risk
* once for initial detection, and spin a thread that will get device
* events thereafter, for apps that use this interface to poll for
* disc insertion.
*/
if (!detectCDThreadHandle)
{
initialDiscDetectionComplete = 0;
detectCDThreadHandle = CreateThread(NULL,0,detectCDThread,NULL,0,NULL);
if (detectCDThreadHandle == NULL)
return; /* oh well. */
while (!initialDiscDetectionComplete)
Sleep(50);
} /* if */
drives = drivesWithMediaBitmap; /* whatever the thread has seen, we take. */
for (i = 'A'; i <= 'Z'; i++)
{
if (drives & (1 << (i - 'A')))
{
drive_str[0] = (char) i;
cb(data, drive_str);
} /* if */
} /* for */
} /* __PHYSFS_platformDetectAvailableCDs */
char *__PHYSFS_platformCalcBaseDir(const char *argv0)
{
DWORD buflen = 64;
LPWSTR modpath = NULL;
char *retval = NULL;
while (1)
{
DWORD rc;
void *ptr;
if ( (ptr = allocator.Realloc(modpath, buflen*sizeof(WCHAR))) == NULL )
{
allocator.Free(modpath);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
modpath = (LPWSTR) ptr;
rc = GetModuleFileNameW(NULL, modpath, buflen);
if (rc == 0)
{
allocator.Free(modpath);
BAIL_MACRO(winApiStrError(), NULL);
} /* if */
if (rc < buflen)
{
buflen = rc;
break;
} /* if */
buflen *= 2;
} /* while */
if (buflen > 0) /* just in case... */
{
WCHAR *ptr = (modpath + buflen) - 1;
while (ptr != modpath)
{
if (*ptr == '\\')
break;
ptr--;
} /* while */
if ((ptr == modpath) && (*ptr != '\\'))
__PHYSFS_setError(ERR_GETMODFN_NO_DIR);
else
{
*(ptr + 1) = '\0'; /* chop off filename. */
retval = unicodeToUtf8Heap(modpath);
} /* else */
} /* else */
allocator.Free(modpath);
return retval; /* w00t. */
} /* __PHYSFS_platformCalcBaseDir */
char *__PHYSFS_platformGetUserName(void)
{
DWORD bufsize = 0;
char *retval = NULL;
if (GetUserNameW(NULL, &bufsize) == 0) /* This SHOULD fail. */
{
LPWSTR wbuf = (LPWSTR) __PHYSFS_smallAlloc(bufsize * sizeof (WCHAR));
BAIL_IF_MACRO(wbuf == NULL, ERR_OUT_OF_MEMORY, NULL);
if (GetUserNameW(wbuf, &bufsize) == 0) /* ?! */
__PHYSFS_setError(winApiStrError());
else
retval = unicodeToUtf8Heap(wbuf);
__PHYSFS_smallFree(wbuf);
} /* if */
return retval;
} /* __PHYSFS_platformGetUserName */
char *__PHYSFS_platformGetUserDir(void)
{
char *retval = (char *) allocator.Malloc(strlen(userDir) + 1);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
strcpy(retval, userDir); /* calculated at init time. */
return retval;
} /* __PHYSFS_platformGetUserDir */
void *__PHYSFS_platformGetThreadID(void)
{
return ( (void *) ((size_t) GetCurrentThreadId()) );
} /* __PHYSFS_platformGetThreadID */
static int isSymlinkAttrs(const DWORD attr, const DWORD tag)
{
return ( (attr & FILE_ATTRIBUTE_REPARSE_POINT) &&
(tag == PHYSFS_IO_REPARSE_TAG_SYMLINK) );
} /* isSymlinkAttrs */
char *__PHYSFS_platformCvtToDependent(const char *prepend,
const char *dirName,
const char *append)
{
const size_t len = ((prepend) ? strlen(prepend) : 0) +
((append) ? strlen(append) : 0) +
strlen(dirName) + 1;
char *retval = (char *) allocator.Malloc(len);
char *p;
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
_snprintf(retval, len, "%s%s%s",
prepend ? prepend : "", dirName, append ? append : "");
for (p = strchr(retval, '/'); p != NULL; p = strchr(p + 1, '/'))
*p = '\\';
return retval;
} /* __PHYSFS_platformCvtToDependent */
void __PHYSFS_platformEnumerateFiles(const char *dirname,
int omitSymLinks,
PHYSFS_EnumFilesCallback callback,
const char *origdir,
void *callbackdata)
{
HANDLE dir = INVALID_HANDLE_VALUE;
WIN32_FIND_DATAW entw;
size_t len = strlen(dirname);
char *searchPath = NULL;
WCHAR *wSearchPath = NULL;
/* Allocate a new string for path, maybe '\\', "*", and NULL terminator */
searchPath = (char *) __PHYSFS_smallAlloc(len + 3);
if (searchPath == NULL)
return;
/* Copy current dirname */
strcpy(searchPath, dirname);
/* if there's no '\\' at the end of the path, stick one in there. */
if (searchPath[len - 1] != '\\')
{
searchPath[len++] = '\\';
searchPath[len] = '\0';
} /* if */
/* Append the "*" to the end of the string */
strcat(searchPath, "*");
UTF8_TO_UNICODE_STACK_MACRO(wSearchPath, searchPath);
if (wSearchPath == NULL)
return; /* oh well. */
dir = FindFirstFileW(wSearchPath, &entw);
__PHYSFS_smallFree(wSearchPath);
__PHYSFS_smallFree(searchPath);
if (dir == INVALID_HANDLE_VALUE)
return;
do
{
const DWORD attr = entw.dwFileAttributes;
const DWORD tag = entw.dwReserved0;
const WCHAR *fn = entw.cFileName;
char *utf8;
if ((fn[0] == '.') && (fn[1] == '\0'))
continue;
if ((fn[0] == '.') && (fn[1] == '.') && (fn[2] == '\0'))
continue;
if ((omitSymLinks) && (isSymlinkAttrs(attr, tag)))
continue;
utf8 = unicodeToUtf8Heap(fn);
if (utf8 != NULL)
{
callback(callbackdata, origdir, utf8);
allocator.Free(utf8);
} /* if */
} while (FindNextFileW(dir, &entw) != 0);
FindClose(dir);
} /* __PHYSFS_platformEnumerateFiles */
int __PHYSFS_platformMkDir(const char *path)
{
WCHAR *wpath;
DWORD rc;
UTF8_TO_UNICODE_STACK_MACRO(wpath, path);
rc = CreateDirectoryW(wpath, NULL);
__PHYSFS_smallFree(wpath);
BAIL_IF_MACRO(rc == 0, winApiStrError(), 0);
return 1;
} /* __PHYSFS_platformMkDir */
int __PHYSFS_platformInit(void)
{
libUserEnv = LoadLibraryA("userenv.dll");
BAIL_IF_MACRO(libUserEnv == NULL, winApiStrError(), 0);
/* !!! FIXME: why do we precalculate this? */
BAIL_IF_MACRO(!determineUserDir(), NULL, 0);
return 1; /* It's all good */
} /* __PHYSFS_platformInit */
int __PHYSFS_platformDeinit(void)
{
if (detectCDThreadHandle != NULL)
{
if (detectCDHwnd)
PostMessageW(detectCDHwnd, WM_QUIT, 0, 0);
CloseHandle(detectCDThreadHandle);
detectCDThreadHandle = NULL;
initialDiscDetectionComplete = 0;
drivesWithMediaBitmap = 0;
} /* if */
if (libUserEnv)
FreeLibrary(libUserEnv);
libUserEnv = NULL;
allocator.Free(userDir);
userDir = NULL;
return 1; /* It's all good */
} /* __PHYSFS_platformDeinit */
static void *doOpen(const char *fname, DWORD mode, DWORD creation, int rdonly)
{
HANDLE fileh;
WinApiFile *retval;
WCHAR *wfname;
UTF8_TO_UNICODE_STACK_MACRO(wfname, fname);
BAIL_IF_MACRO(wfname == NULL, ERR_OUT_OF_MEMORY, NULL);
fileh = CreateFileW(wfname, mode, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, creation, FILE_ATTRIBUTE_NORMAL, NULL);
__PHYSFS_smallFree(wfname);
BAIL_IF_MACRO(fileh == INVALID_HANDLE_VALUE,winApiStrError(), NULL);
retval = (WinApiFile *) allocator.Malloc(sizeof (WinApiFile));
if (retval == NULL)
{
CloseHandle(fileh);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
retval->readonly = rdonly;
retval->handle = fileh;
return retval;
} /* doOpen */
void *__PHYSFS_platformOpenRead(const char *filename)
{
return doOpen(filename, GENERIC_READ, OPEN_EXISTING, 1);
} /* __PHYSFS_platformOpenRead */
void *__PHYSFS_platformOpenWrite(const char *filename)
{
return doOpen(filename, GENERIC_WRITE, CREATE_ALWAYS, 0);
} /* __PHYSFS_platformOpenWrite */
void *__PHYSFS_platformOpenAppend(const char *filename)
{
void *retval = doOpen(filename, GENERIC_WRITE, OPEN_ALWAYS, 0);
if (retval != NULL)
{
HANDLE h = ((WinApiFile *) retval)->handle;
DWORD rc = SetFilePointer(h, 0, NULL, FILE_END);
if (rc == PHYSFS_INVALID_SET_FILE_POINTER)
{
const char *err = winApiStrError();
CloseHandle(h);
allocator.Free(retval);
BAIL_MACRO(err, NULL);
} /* if */
} /* if */
return retval;
} /* __PHYSFS_platformOpenAppend */
/* !!! FIXME: this function fails if len > 0xFFFFFFFF. */
PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buf, PHYSFS_uint64 len)
{
HANDLE Handle = ((WinApiFile *) opaque)->handle;
DWORD CountOfBytesRead = 0;
BAIL_IF_MACRO(!__PHYSFS_ui64FitsAddressSpace(len),ERR_INVALID_ARGUMENT,-1);
if(!ReadFile(Handle, buf, (DWORD) len, &CountOfBytesRead, NULL))
BAIL_MACRO(winApiStrError(), -1);
return (PHYSFS_sint64) CountOfBytesRead;
} /* __PHYSFS_platformRead */
/* !!! FIXME: this function fails if len > 0xFFFFFFFF. */
PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
PHYSFS_uint64 len)
{
HANDLE Handle = ((WinApiFile *) opaque)->handle;
DWORD CountOfBytesWritten = 0;
BAIL_IF_MACRO(!__PHYSFS_ui64FitsAddressSpace(len),ERR_INVALID_ARGUMENT,-1);
if(!WriteFile(Handle, buffer, (DWORD) len, &CountOfBytesWritten, NULL))
BAIL_MACRO(winApiStrError(), -1);
return (PHYSFS_sint64) CountOfBytesWritten;
} /* __PHYSFS_platformWrite */
int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
HANDLE Handle = ((WinApiFile *) opaque)->handle;
LONG HighOrderPos;
PLONG pHighOrderPos;
DWORD rc;
/* Get the high order 32-bits of the position */
HighOrderPos = HIGHORDER_UINT64(pos);
/*
* MSDN: "If you do not need the high-order 32 bits, this
* pointer must be set to NULL."
*/
pHighOrderPos = (HighOrderPos) ? &HighOrderPos : NULL;
/*
* !!! FIXME: MSDN: "Windows Me/98/95: If the pointer
* !!! FIXME: lpDistanceToMoveHigh is not NULL, then it must
* !!! FIXME: point to either 0, INVALID_SET_FILE_POINTER, or
* !!! FIXME: the sign extension of the value of lDistanceToMove.
* !!! FIXME: Any other value will be rejected."
*/
/* Move pointer "pos" count from start of file */
rc = SetFilePointer(Handle, LOWORDER_UINT64(pos),
pHighOrderPos, FILE_BEGIN);
if ( (rc == PHYSFS_INVALID_SET_FILE_POINTER) &&
(GetLastError() != NO_ERROR) )
{
BAIL_MACRO(winApiStrError(), 0);
} /* if */
return 1; /* No error occured */
} /* __PHYSFS_platformSeek */
PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
HANDLE Handle = ((WinApiFile *) opaque)->handle;
LONG HighPos = 0;
DWORD LowPos;
PHYSFS_sint64 retval;
/* Get current position */
LowPos = SetFilePointer(Handle, 0, &HighPos, FILE_CURRENT);
if ( (LowPos == PHYSFS_INVALID_SET_FILE_POINTER) &&
(GetLastError() != NO_ERROR) )
{
BAIL_MACRO(winApiStrError(), -1);
} /* if */
else
{
/* Combine the high/low order to create the 64-bit position value */
retval = (((PHYSFS_uint64) HighPos) << 32) | LowPos;
assert(retval >= 0);
} /* else */
return retval;
} /* __PHYSFS_platformTell */
PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
{
HANDLE Handle = ((WinApiFile *) opaque)->handle;
DWORD SizeHigh;
DWORD SizeLow;
PHYSFS_sint64 retval;
SizeLow = GetFileSize(Handle, &SizeHigh);
if ( (SizeLow == PHYSFS_INVALID_SET_FILE_POINTER) &&
(GetLastError() != NO_ERROR) )
{
BAIL_MACRO(winApiStrError(), -1);
} /* if */
else
{
/* Combine the high/low order to create the 64-bit position value */
retval = (((PHYSFS_uint64) SizeHigh) << 32) | SizeLow;
assert(retval >= 0);
} /* else */
return retval;
} /* __PHYSFS_platformFileLength */
int __PHYSFS_platformFlush(void *opaque)
{
WinApiFile *fh = ((WinApiFile *) opaque);
if (!fh->readonly)
BAIL_IF_MACRO(!FlushFileBuffers(fh->handle), winApiStrError(), 0);
return 1;
} /* __PHYSFS_platformFlush */
void __PHYSFS_platformClose(void *opaque)
{
HANDLE Handle = ((WinApiFile *) opaque)->handle;
(void) CloseHandle(Handle); /* ignore errors. You should have flushed! */
allocator.Free(opaque);
} /* __PHYSFS_platformClose */
static int doPlatformDelete(LPWSTR wpath)
{
const int isdir = (GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY);
const BOOL rc = (isdir) ? RemoveDirectoryW(wpath) : DeleteFileW(wpath);
BAIL_IF_MACRO(!rc, winApiStrError(), 0);
return 1; /* if you made it here, it worked. */
} /* doPlatformDelete */
int __PHYSFS_platformDelete(const char *path)
{
int retval = 0;
LPWSTR wpath = NULL;
UTF8_TO_UNICODE_STACK_MACRO(wpath, path);
BAIL_IF_MACRO(wpath == NULL, ERR_OUT_OF_MEMORY, 0);
retval = doPlatformDelete(wpath);
__PHYSFS_smallFree(wpath);
return retval;
} /* __PHYSFS_platformDelete */
/*
* !!! FIXME: why aren't we using Critical Sections instead of Mutexes?
* !!! FIXME: mutexes on Windows are for cross-process sync. CritSects are
* !!! FIXME: mutexes for threads in a single process and are faster.
*/
void *__PHYSFS_platformCreateMutex(void)
{
return ((void *) CreateMutex(NULL, FALSE, NULL));
} /* __PHYSFS_platformCreateMutex */
void __PHYSFS_platformDestroyMutex(void *mutex)
{
CloseHandle((HANDLE) mutex);
} /* __PHYSFS_platformDestroyMutex */
int __PHYSFS_platformGrabMutex(void *mutex)
{
return (WaitForSingleObject((HANDLE) mutex, INFINITE) != WAIT_FAILED);
} /* __PHYSFS_platformGrabMutex */
void __PHYSFS_platformReleaseMutex(void *mutex)
{
ReleaseMutex((HANDLE) mutex);
} /* __PHYSFS_platformReleaseMutex */
static PHYSFS_sint64 FileTimeToPhysfsTime(const FILETIME *ft)
{
SYSTEMTIME st_utc;
SYSTEMTIME st_localtz;
TIME_ZONE_INFORMATION tzi;
DWORD tzid;
PHYSFS_sint64 retval;
struct tm tm;
BOOL rc;
BAIL_IF_MACRO(!FileTimeToSystemTime(ft, &st_utc), winApiStrError(), -1);
tzid = GetTimeZoneInformation(&tzi);
BAIL_IF_MACRO(tzid == TIME_ZONE_ID_INVALID, winApiStrError(), -1);
rc = SystemTimeToTzSpecificLocalTime(&tzi, &st_utc, &st_localtz);
BAIL_IF_MACRO(!rc, winApiStrError(), -1);
/* Convert to a format that mktime() can grok... */
tm.tm_sec = st_localtz.wSecond;
tm.tm_min = st_localtz.wMinute;
tm.tm_hour = st_localtz.wHour;
tm.tm_mday = st_localtz.wDay;
tm.tm_mon = st_localtz.wMonth - 1;
tm.tm_year = st_localtz.wYear - 1900;
tm.tm_wday = -1 /*st_localtz.wDayOfWeek*/;
tm.tm_yday = -1;
tm.tm_isdst = -1;
/* Convert to a format PhysicsFS can grok... */
retval = (PHYSFS_sint64) mktime(&tm);
BAIL_IF_MACRO(retval == -1, strerror(errno), -1);
return retval;
} /* FileTimeToPhysfsTime */
int __PHYSFS_platformStat(const char *filename, int *exists, PHYSFS_Stat *stat)
{
WIN32_FILE_ATTRIBUTE_DATA winstat;
WCHAR *wstr = NULL;
DWORD err = 0;
BOOL rc = 0;
UTF8_TO_UNICODE_STACK_MACRO(wstr, filename);
BAIL_IF_MACRO(wstr == NULL, ERR_OUT_OF_MEMORY, 0);
rc = GetFileAttributesExW(wstr, GetFileExInfoStandard, &winstat);
err = (!rc) ? GetLastError() : 0;
*exists = ((err != ERROR_FILE_NOT_FOUND) && (err != ERROR_PATH_NOT_FOUND));
__PHYSFS_smallFree(wstr);
BAIL_IF_MACRO(!rc, winApiStrErrorByNum(err), 0);
stat->modtime = FileTimeToPhysfsTime(&winstat.ftLastWriteTime);
stat->accesstime = FileTimeToPhysfsTime(&winstat.ftLastAccessTime);
stat->createtime = FileTimeToPhysfsTime(&winstat.ftCreationTime);
if(winstat.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
stat->filetype = PHYSFS_FILETYPE_DIRECTORY;
stat->filesize = 0;
} /* if */
else if(winstat.dwFileAttributes & (FILE_ATTRIBUTE_OFFLINE | FILE_ATTRIBUTE_DEVICE))
{
/* !!! FIXME: what are reparse points? */
stat->filetype = PHYSFS_FILETYPE_OTHER;
/* !!! FIXME: don't rely on this */
stat->filesize = 0;
} /* else if */
/* !!! FIXME: check for symlinks on Vista. */
else
{
stat->filetype = PHYSFS_FILETYPE_REGULAR;
stat->filesize = (((PHYSFS_uint64) winstat.nFileSizeHigh) << 32) | winstat.nFileSizeLow;
} /* else */
stat->readonly = ((winstat.dwFileAttributes & FILE_ATTRIBUTE_READONLY) != 0);
return 1;
} /* __PHYSFS_platformStat */
/* !!! FIXME: Don't use C runtime for allocators? */
int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
{
return 0; /* just use malloc() and friends. */
} /* __PHYSFS_platformSetDefaultAllocator */
#endif /* PHYSFS_PLATFORM_WINDOWS */
/* end of windows.c ... */
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