/
win32.c
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/*
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* Win32 support routines for PhysicsFS.
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*
* Please see the file LICENSE in the source's root directory.
*
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* This file written by Ryan C. Gordon, and made sane by Gregory S. Read.
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*/
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#if HAVE_CONFIG_H
# include <config.h>
#endif
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#ifdef WIN32
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#include <windows.h>
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
#include <errno.h>
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#include <ctype.h>
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#include <time.h>
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#include <assert.h>
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#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
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#ifdef _MSC_VER /* for Cygwin, etc. */
#define alloca _alloca
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#endif
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#define LOWORDER_UINT64(pos) (PHYSFS_uint32)(pos & 0x00000000FFFFFFFF)
#define HIGHORDER_UINT64(pos) (PHYSFS_uint32)(pos & 0xFFFFFFFF00000000)
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/* GetUserProfileDirectory() is only available on >= NT4 (no 9x/ME systems!) */
typedef BOOL (STDMETHODCALLTYPE FAR * LPFNGETUSERPROFILEDIR) (
HANDLE hToken,
LPTSTR lpProfileDir,
LPDWORD lpcchSize);
/* GetFileAttributesEx() is only available on >= Win98 or WinNT4 ... */
typedef BOOL (STDMETHODCALLTYPE FAR * LPFNGETFILEATTRIBUTESEX) (
LPCTSTR lpFileName,
GET_FILEEX_INFO_LEVELS fInfoLevelId,
LPVOID lpFileInformation);
typedef struct
{
HANDLE handle;
int readonly;
} win32file;
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const char *__PHYSFS_platformDirSeparator = "\\";
static LPFNGETFILEATTRIBUTESEX pGetFileAttributesEx = NULL;
static HANDLE libKernel32 = NULL;
static char *userDir = NULL;
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/*
* 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
*/
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#ifndef INVALID_SET_FILE_POINTER
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# define INVALID_SET_FILE_POINTER 0xFFFFFFFF
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#endif
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/* just in case... */
#ifndef INVALID_FILE_ATTRIBUTES
# define INVALID_FILE_ATTRIBUTES 0xFFFFFFFF
#endif
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/*
* Figure out what the last failing Win32 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 *win32strerror(void)
{
static TCHAR msgbuf[255];
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TCHAR *ptr = msgbuf;
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FormatMessage(
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
msgbuf,
sizeof (msgbuf) / sizeof (TCHAR),
NULL
);
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/* chop off newlines. */
for (ptr = msgbuf; *ptr; ptr++)
{
if ((*ptr == '\n') || (*ptr == '\r'))
{
*ptr = ' ';
break;
} /* if */
} /* for */
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return((const char *) msgbuf);
} /* win32strerror */
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static char *getExePath(const char *argv0)
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{
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DWORD buflen;
int success = 0;
char *ptr = NULL;
char *retval = (char *) malloc(sizeof (TCHAR) * (MAX_PATH + 1));
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
retval[0] = '\0';
buflen = GetModuleFileName(NULL, retval, MAX_PATH + 1);
if (buflen <= 0)
__PHYSFS_setError(win32strerror());
else
{
retval[buflen] = '\0'; /* does API always null-terminate this? */
/* make sure the string was not truncated. */
if (__PHYSFS_platformStricmp(&retval[buflen - 4], ".exe") != 0)
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__PHYSFS_setError(ERR_GETMODFN_TRUNC);
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else
{
ptr = strrchr(retval, '\\');
if (ptr == NULL)
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__PHYSFS_setError(ERR_GETMODFN_NO_DIR);
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else
{
*(ptr + 1) = '\0'; /* chop off filename. */
success = 1;
} /* else */
} /* else */
} /* else */
/* if any part of the previous approach failed, try SearchPath()... */
if (!success)
{
if (argv0 == NULL)
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__PHYSFS_setError(ERR_ARGV0_IS_NULL);
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else
{
buflen = SearchPath(NULL, argv0, NULL, MAX_PATH+1, retval, &ptr);
if (buflen == 0)
__PHYSFS_setError(win32strerror());
else if (buflen > MAX_PATH)
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__PHYSFS_setError(ERR_SEARCHPATH_TRUNC);
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else
success = 1;
} /* else */
} /* if */
if (!success)
{
free(retval);
return(NULL); /* physfs error message will be set, above. */
} /* if */
/* free up the bytes we didn't actually use. */
ptr = (char *) realloc(retval, strlen(retval) + 1);
if (ptr != NULL)
retval = ptr;
return(retval); /* w00t. */
} /* getExePath */
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/*
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* Try to make use of GetUserProfileDirectory(), which isn't available on
* some common variants of Win32. If we can't use this, we just punt and
* use the physfs base dir for the user dir, too.
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*
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* 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.
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*/
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static int determineUserDir(void)
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{
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DWORD psize = 0;
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char dummy[1];
BOOL rc = 0;
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HANDLE processHandle; /* Current process handle */
HANDLE accessToken = NULL; /* Security handle to process */
LPFNGETUSERPROFILEDIR GetUserProfileDirectory;
HMODULE lib;
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assert(userDir == NULL);
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/*
* GetUserProfileDirectory() is only available on NT 4.0 and later.
* This means Win95/98/ME (and CE?) users have to do without, so for
* them, we'll default to the base directory when we can't get the
* function pointer.
*/
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lib = LoadLibrary("userenv.dll");
if (lib)
{
/* !!! FIXME: Handle Unicode? */
GetUserProfileDirectory = (LPFNGETUSERPROFILEDIR)
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GetProcAddress(lib, "GetUserProfileDirectoryA");
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if (GetUserProfileDirectory)
{
processHandle = GetCurrentProcess();
if (OpenProcessToken(processHandle, TOKEN_QUERY, &accessToken))
{
/*
* 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 = GetUserProfileDirectory(accessToken, dummy, &psize);
assert(!rc); /* success?! */
/* Allocate memory for the profile directory */
userDir = (char *) malloc(psize);
if (userDir != NULL)
{
if (!GetUserProfileDirectory(accessToken, userDir, &psize))
{
free(userDir);
userDir = NULL;
} /* if */
} /* else */
} /* if */
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CloseHandle(accessToken);
} /* if */
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FreeLibrary(lib);
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} /* if */
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if (userDir == NULL) /* couldn't get profile for some reason. */
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{
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/* Might just be a non-NT system; resort to the basedir. */
userDir = getExePath(NULL);
BAIL_IF_MACRO(userDir == NULL, NULL, 0); /* STILL failed?! */
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} /* if */
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return(1); /* We made it: hit the showers. */
} /* determineUserDir */
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static BOOL mediaInDrive(const char *drive)
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{
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UINT oldErrorMode;
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DWORD tmp;
BOOL retval;
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/* Prevent windows warning message to appear when checking media size */
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oldErrorMode = SetErrorMode(SEM_FAILCRITICALERRORS);
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/* If this function succeeds, there's media in the drive */
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retval = GetVolumeInformation(drive, NULL, 0, NULL, NULL, &tmp, NULL, 0);
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/* Revert back to old windows error handler */
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SetErrorMode(oldErrorMode);
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return(retval);
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} /* mediaInDrive */
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char **__PHYSFS_platformDetectAvailableCDs(void)
{
char **retval = (char **) malloc(sizeof (char *));
int cd_count = 1; /* We count the NULL entry. */
char drive_str[4] = "x:\\";
for (drive_str[0] = 'A'; drive_str[0] <= 'Z'; drive_str[0]++)
{
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if (GetDriveType(drive_str) == DRIVE_CDROM && mediaInDrive(drive_str))
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{
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char **tmp = realloc(retval, sizeof (char *) * (cd_count + 1));
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if (tmp)
{
retval = tmp;
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retval[cd_count - 1] = (char *) malloc(4);
if (retval[cd_count - 1])
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{
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strcpy(retval[cd_count - 1], drive_str);
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cd_count++;
} /* if */
} /* if */
} /* if */
} /* for */
retval[cd_count - 1] = NULL;
return(retval);
} /* __PHYSFS_detectAvailableCDs */
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char *__PHYSFS_platformCalcBaseDir(const char *argv0)
{
if (strchr(argv0, '\\') != NULL) /* default behaviour can handle this. */
return(NULL);
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return(getExePath(argv0));
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} /* __PHYSFS_platformCalcBaseDir */
char *__PHYSFS_platformGetUserName(void)
{
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DWORD bufsize = 0;
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LPTSTR retval = NULL;
if (GetUserName(NULL, &bufsize) == 0) /* This SHOULD fail. */
{
retval = (LPTSTR) malloc(bufsize);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
if (GetUserName(retval, &bufsize) == 0) /* ?! */
{
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__PHYSFS_setError(win32strerror());
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free(retval);
retval = NULL;
} /* if */
} /* if */
return((char *) retval);
} /* __PHYSFS_platformGetUserName */
char *__PHYSFS_platformGetUserDir(void)
{
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char *retval = (char *) malloc(strlen(userDir) + 1);
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BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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strcpy(retval, userDir); /* calculated at init time. */
return(retval);
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} /* __PHYSFS_platformGetUserDir */
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PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
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{
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return((PHYSFS_uint64) GetCurrentThreadId());
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} /* __PHYSFS_platformGetThreadID */
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/* ...make this Cygwin AND Visual C friendly... */
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int __PHYSFS_platformStricmp(const char *x, const char *y)
{
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#if (defined _MSC_VER)
return(stricmp(x, y));
#else
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int ux, uy;
do
{
ux = toupper((int) *x);
uy = toupper((int) *y);
if (ux > uy)
return(1);
else if (ux < uy)
return(-1);
x++;
y++;
} while ((ux) && (uy));
return(0);
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#endif
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} /* __PHYSFS_platformStricmp */
int __PHYSFS_platformExists(const char *fname)
{
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BAIL_IF_MACRO(GetFileAttributes(fname) == INVALID_FILE_ATTRIBUTES,
win32strerror(), 0);
return(1);
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} /* __PHYSFS_platformExists */
int __PHYSFS_platformIsSymLink(const char *fname)
{
return(0); /* no symlinks on win32. */
} /* __PHYSFS_platformIsSymlink */
int __PHYSFS_platformIsDirectory(const char *fname)
{
return((GetFileAttributes(fname) & FILE_ATTRIBUTE_DIRECTORY) != 0);
} /* __PHYSFS_platformIsDirectory */
char *__PHYSFS_platformCvtToDependent(const char *prepend,
const char *dirName,
const char *append)
{
int len = ((prepend) ? strlen(prepend) : 0) +
((append) ? strlen(append) : 0) +
strlen(dirName) + 1;
char *retval = malloc(len);
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char *p;
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BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
if (prepend)
strcpy(retval, prepend);
else
retval[0] = '\0';
strcat(retval, dirName);
if (append)
strcat(retval, append);
for (p = strchr(retval, '/'); p != NULL; p = strchr(p + 1, '/'))
*p = '\\';
return(retval);
} /* __PHYSFS_platformCvtToDependent */
/* Much like my college days, try to sleep for 10 milliseconds at a time... */
void __PHYSFS_platformTimeslice(void)
{
Sleep(10);
} /* __PHYSFS_platformTimeslice */
LinkedStringList *__PHYSFS_platformEnumerateFiles(const char *dirname,
int omitSymLinks)
{
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LinkedStringList *retval = NULL, *p = NULL;
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HANDLE dir;
WIN32_FIND_DATA ent;
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char *SearchPath;
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size_t len = strlen(dirname);
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/* Allocate a new string for path, maybe '\\', "*", and NULL terminator */
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SearchPath = (char *) alloca(len + 3);
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BAIL_IF_MACRO(SearchPath == NULL, ERR_OUT_OF_MEMORY, NULL);
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/* Copy current dirname */
strcpy(SearchPath, dirname);
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/* if there's no '\\' at the end of the path, stick one in there. */
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if (SearchPath[len - 1] != '\\')
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{
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SearchPath[len++] = '\\';
SearchPath[len] = '\0';
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} /* if */
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/* Append the "*" to the end of the string */
strcat(SearchPath, "*");
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dir = FindFirstFile(SearchPath, &ent);
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BAIL_IF_MACRO(dir == INVALID_HANDLE_VALUE, win32strerror(), NULL);
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do
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{
if (strcmp(ent.cFileName, ".") == 0)
continue;
if (strcmp(ent.cFileName, "..") == 0)
continue;
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retval = __PHYSFS_addToLinkedStringList(retval, &p, ent.cFileName, -1);
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} while (FindNextFile(dir, &ent) != 0);
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FindClose(dir);
return(retval);
} /* __PHYSFS_platformEnumerateFiles */
char *__PHYSFS_platformCurrentDir(void)
{
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LPTSTR retval;
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DWORD buflen = 0;
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buflen = GetCurrentDirectory(buflen, NULL);
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retval = (LPTSTR) malloc(sizeof (TCHAR) * (buflen + 2));
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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GetCurrentDirectory(buflen, retval);
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if (retval[buflen - 2] != '\\')
strcat(retval, "\\");
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return((char *) retval);
} /* __PHYSFS_platformCurrentDir */
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/* this could probably use a cleanup. */
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char *__PHYSFS_platformRealPath(const char *path)
{
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char *retval = NULL;
char *p = NULL;
BAIL_IF_MACRO(path == NULL, ERR_INVALID_ARGUMENT, NULL);
BAIL_IF_MACRO(*path == '\0', ERR_INVALID_ARGUMENT, NULL);
retval = (char *) malloc(MAX_PATH);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
/*
* If in \\server\path format, it's already an absolute path.
* We'll need to check for "." and ".." dirs, though, just in case.
*/
if ((path[0] == '\\') && (path[1] == '\\'))
strcpy(retval, path);
else
{
char *currentDir = __PHYSFS_platformCurrentDir();
if (currentDir == NULL)
{
free(retval);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
if (path[1] == ':') /* drive letter specified? */
{
/*
* Apparently, "D:mypath" is the same as "D:\\mypath" if
* D: is not the current drive. However, if D: is the
* current drive, then "D:mypath" is a relative path. Ugh.
*/
if (path[2] == '\\') /* maybe an absolute path? */
strcpy(retval, path);
else /* definitely an absolute path. */
{
if (path[0] == currentDir[0]) /* current drive; relative. */
{
strcpy(retval, currentDir);
strcat(retval, path + 2);
} /* if */
else /* not current drive; absolute. */
{
retval[0] = path[0];
retval[1] = ':';
retval[2] = '\\';
strcpy(retval + 3, path + 2);
} /* else */
} /* else */
} /* if */
else /* no drive letter specified. */
{
if (path[0] == '\\') /* absolute path. */
{
retval[0] = currentDir[0];
retval[1] = ':';
strcpy(retval + 2, path);
} /* if */
else
{
strcpy(retval, currentDir);
strcat(retval, path);
} /* else */
} /* else */
free(currentDir);
} /* else */
/* (whew.) Ok, now take out "." and ".." path entries... */
p = retval;
while ( (p = strstr(p, "\\.")) != NULL)
{
/* it's a "." entry that doesn't end the string. */
if (p[2] == '\\')
memmove(p + 1, p + 3, strlen(p + 3) + 1);
/* it's a "." entry that ends the string. */
else if (p[2] == '\0')
p[0] = '\0';
/* it's a ".." entry. */
else if (p[2] == '.')
{
char *prevEntry = p - 1;
while ((prevEntry != retval) && (*prevEntry != '\\'))
prevEntry--;
if (prevEntry == retval) /* make it look like a "." entry. */
memmove(p + 1, p + 2, strlen(p + 2) + 1);
else
{
if (p[3] != '\0') /* doesn't end string. */
*prevEntry = '\0';
else /* ends string. */
memmove(prevEntry + 1, p + 4, strlen(p + 4) + 1);
p = prevEntry;
} /* else */
} /* else if */
else
{
p++; /* look past current char. */
} /* else */
} /* while */
/* shrink the retval's memory block if possible... */
p = (char *) realloc(retval, strlen(retval) + 1);
if (p != NULL)
retval = p;
return(retval);
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} /* __PHYSFS_platformRealPath */
int __PHYSFS_platformMkDir(const char *path)
{
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DWORD rc = CreateDirectory(path, NULL);
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BAIL_IF_MACRO(rc == 0, win32strerror(), 0);
return(1);
} /* __PHYSFS_platformMkDir */
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/*
* Get OS info and save the important parts.
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*
* Returns non-zero if successful, otherwise it returns zero on failure.
*/
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static int getOSInfo(void)
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{
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#if 0 /* we don't actually use this at the moment, but may in the future. */
OSVERSIONINFO OSVersionInfo; /* Information about the OS */
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OSVersionInfo.dwOSVersionInfoSize = sizeof(OSVersionInfo);
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BAIL_IF_MACRO(!GetVersionEx(&OSVersionInfo), win32strerror(), 0);
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/* Set to TRUE if we are runnign a WinNT based OS 4.0 or greater */
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runningNT = ((OSVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT) &&
(OSVersionInfo.dwMajorVersion >= 4));
#endif
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return(1);
} /* getOSInfo */
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/*
* Some things we want/need are in external DLLs that may or may not be
* available, based on the operating system, etc. This function loads those
* libraries and hunts down the needed pointers.
*
* Libraries that are one-shot deals, or better loaded as needed, are loaded
* elsewhere (see determineUserDir()).
*
* Returns zero if a needed library couldn't load, non-zero if we have enough
* to go on (which means some useful but non-crucial libraries may _NOT_ be
* loaded; check the related module-scope variables).
*/
static int loadLibraries(void)
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{
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/* !!! FIXME: Make this table driven? */
int allNeededLibrariesLoaded = 1; /* flip to zero as needed. */
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libKernel32 = LoadLibrary("kernel32.dll");
if (libKernel32)
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{
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pGetFileAttributesEx = (LPFNGETFILEATTRIBUTESEX)
GetProcAddress(libKernel32, "GetFileAttributesExA");
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} /* if */
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/* add other DLLs here... */
/* see if there's any reason to keep kernel32.dll around... */
if (libKernel32)
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{
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if ((pGetFileAttributesEx == NULL) /* && (somethingElse == NULL) */ )
{
FreeLibrary(libKernel32);
libKernel32 = NULL;
} /* if */
} /* if */
return(allNeededLibrariesLoaded);
} /* loadLibraries */
int __PHYSFS_platformInit(void)
{
BAIL_IF_MACRO(!getOSInfo(), NULL, 0);
BAIL_IF_MACRO(!loadLibraries(), NULL, 0);
BAIL_IF_MACRO(!determineUserDir(), NULL, 0);
return(1); /* It's all good */
} /* __PHYSFS_platformInit */
687
688
689
690
int __PHYSFS_platformDeinit(void)
{
691
if (userDir != NULL)
692
{
693
694
free(userDir);
userDir = NULL;
695
} /* if */
696
697
698
699
700
701
702
if (libKernel32)
{
FreeLibrary(libKernel32);
libKernel32 = NULL;
} /* if */
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
return(1); /* It's all good */
} /* __PHYSFS_platformDeinit */
static void *doOpen(const char *fname, DWORD mode, DWORD creation, int rdonly)
{
HANDLE fileHandle;
win32file *retval;
fileHandle = CreateFile(fname, mode, FILE_SHARE_READ, NULL,
creation, FILE_ATTRIBUTE_NORMAL, NULL);
BAIL_IF_MACRO(fileHandle == INVALID_HANDLE_VALUE, win32strerror(), NULL);
retval = malloc(sizeof (win32file));
if (retval == NULL)
719
{
720
721
CloseHandle(fileHandle);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
722
} /* if */
723
724
725
726
727
728
retval->readonly = rdonly;
retval->handle = fileHandle;
return(retval);
} /* doOpen */
729
730
731
void *__PHYSFS_platformOpenRead(const char *filename)
{
732
733
return(doOpen(filename, GENERIC_READ, OPEN_EXISTING, 1));
} /* __PHYSFS_platformOpenRead */
734
735
736
737
void *__PHYSFS_platformOpenWrite(const char *filename)
{
738
739
return(doOpen(filename, GENERIC_WRITE, CREATE_ALWAYS, 0));
} /* __PHYSFS_platformOpenWrite */
740
741
742
743
void *__PHYSFS_platformOpenAppend(const char *filename)
{
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
void *retval = doOpen(filename, GENERIC_WRITE, OPEN_ALWAYS, 0);
if (retval != NULL)
{
HANDLE h = ((win32file *) retval)->handle;
if (SetFilePointer(h, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER)
{
const char *err = win32strerror();
CloseHandle(h);
free(retval);
BAIL_MACRO(err, NULL);
} /* if */
} /* if */
return(retval);
} /* __PHYSFS_platformOpenAppend */
759
760
761
762
763
PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
764
HANDLE FileHandle = ((win32file *) opaque)->handle;
765
766
767
768
DWORD CountOfBytesRead;
PHYSFS_sint64 retval;
/* Read data from the file */
769
/* !!! FIXME: uint32 might be a greater # than DWORD */
770
771
if(!ReadFile(FileHandle, buffer, count * size, &CountOfBytesRead, NULL))
{
772
773
BAIL_MACRO(win32strerror(), -1);
} /* if */
774
775
776
else
{
/* Return the number of "objects" read. */
777
/* !!! FIXME: What if not the right amount of bytes was read to make an object? */
778
retval = CountOfBytesRead / size;
779
} /* else */
780
781
782
783
return(retval);
} /* __PHYSFS_platformRead */
784
785
PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
786
787
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
788
HANDLE FileHandle = ((win32file *) opaque)->handle;
789
790
791
792
DWORD CountOfBytesWritten;
PHYSFS_sint64 retval;
/* Read data from the file */
793
/* !!! FIXME: uint32 might be a greater # than DWORD */
794
795
if(!WriteFile(FileHandle, buffer, count * size, &CountOfBytesWritten, NULL))
{
796
797
BAIL_MACRO(win32strerror(), -1);
} /* if */
798
799
800
else
{
/* Return the number of "objects" read. */
801
/* !!! FIXME: What if not the right number of bytes was written? */
802
retval = CountOfBytesWritten / size;
803
} /* else */
804
805
806
807
return(retval);
} /* __PHYSFS_platformWrite */
808
809
810
int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
811
HANDLE FileHandle = ((win32file *) opaque)->handle;
812
DWORD HighOrderPos;
813
DWORD rc;
814
815
816
817
/* Get the high order 32-bits of the position */
HighOrderPos = HIGHORDER_UINT64(pos);
818
/* !!! FIXME: SetFilePointer needs a signed 64-bit value. */
819
/* Move pointer "pos" count from start of file */
820
821
rc = SetFilePointer(FileHandle, LOWORDER_UINT64(pos),
&HighOrderPos, FILE_BEGIN);
822
823
824
825
826
827
if ((rc == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
BAIL_MACRO(win32strerror(), 0);
return(1); /* No error occured */
} /* __PHYSFS_platformSeek */
828
829
830
831
PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
832
833
834
HANDLE FileHandle = ((win32file *) opaque)->handle;
DWORD HighPos = 0;
DWORD LowPos;
835
836
837
PHYSFS_sint64 retval;
/* Get current position */
838
839
LowPos = SetFilePointer(FileHandle, 0, &HighPos, FILE_CURRENT);
if ((LowPos == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
840
{
841
842
BAIL_MACRO(win32strerror(), 0);
} /* if */
843
844
845
else
{
/* Combine the high/low order to create the 64-bit position value */
846
847
848
849
850
851
retval = (((PHYSFS_uint64) HighPos) << 32) | LowPos;
assert(retval >= 0);
} /* else */
return(retval);
} /* __PHYSFS_platformTell */
852
853
854
PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
855
{
856
857
858
HANDLE FileHandle = ((win32file *) opaque)->handle;
DWORD SizeHigh;
DWORD SizeLow;
859
860
PHYSFS_sint64 retval;
861
862
SizeLow = GetFileSize(FileHandle, &SizeHigh);
if ((SizeLow == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
863
{
864
865
BAIL_MACRO(win32strerror(), -1);
} /* if */
866
867
868
else
{
/* Combine the high/low order to create the 64-bit position value */
869
870
retval = (((PHYSFS_uint64) SizeHigh) << 32) | SizeLow;
assert(retval >= 0);
871
} /* else */
872
873
874
875
return(retval);
} /* __PHYSFS_platformFileLength */
876
877
878
879
880
881
882
int __PHYSFS_platformEOF(void *opaque)
{
PHYSFS_sint64 FilePosition;
int retval = 0;
/* Get the current position in the file */
883
if ((FilePosition = __PHYSFS_platformTell(opaque)) != 0)
884
{
885
886
/* Non-zero if EOF is equal to the file length */
retval = FilePosition == __PHYSFS_platformFileLength(opaque);
887
888
889
890
} /* if */
return(retval);
} /* __PHYSFS_platformEOF */
891
892
893
894
int __PHYSFS_platformFlush(void *opaque)
{
895
896
897
win32file *fh = ((win32file *) opaque);
if (!fh->readonly)
BAIL_IF_MACRO(!FlushFileBuffers(fh->handle), win32strerror(), 0);
898
899
900
return(1);
} /* __PHYSFS_platformFlush */
901
902
903
904
int __PHYSFS_platformClose(void *opaque)
{
905
906
907
908
909
HANDLE FileHandle = ((win32file *) opaque)->handle;
BAIL_IF_MACRO(!CloseHandle(FileHandle), win32strerror(), 0);
free(opaque);
return(1);
} /* __PHYSFS_platformClose */
910
911
912
913
914
int __PHYSFS_platformDelete(const char *path)
{
/* If filename is a folder */
915
if (GetFileAttributes(path) == FILE_ATTRIBUTE_DIRECTORY)
916
{
917
918
BAIL_IF_MACRO(!RemoveDirectory(path), win32strerror(), 0);
} /* if */
919
920
else
{
921
922
BAIL_IF_MACRO(!DeleteFile(path), win32strerror(), 0);
} /* else */
923
924
925
return(1); /* if you got here, it worked. */
} /* __PHYSFS_platformDelete */
926
927
928
929
void *__PHYSFS_platformCreateMutex(void)
{
930
931
932
return((void *) CreateMutex(NULL, FALSE, NULL));
} /* __PHYSFS_platformCreateMutex */
933
934
935
void __PHYSFS_platformDestroyMutex(void *mutex)
{
936
937
938
CloseHandle((HANDLE) mutex);
} /* __PHYSFS_platformDestroyMutex */
939
940
941
int __PHYSFS_platformGrabMutex(void *mutex)
{
942
943
return(WaitForSingleObject((HANDLE) mutex, INFINITE) != WAIT_FAILED);
} /* __PHYSFS_platformGrabMutex */
944
945
946
947
void __PHYSFS_platformReleaseMutex(void *mutex)
{
948
949
950
ReleaseMutex((HANDLE) mutex);
} /* __PHYSFS_platformReleaseMutex */
951
952
static PHYSFS_sint64 FileTimeToPhysfsTime(const FILETIME *ft)
953
954
955
{
SYSTEMTIME st_utc;
SYSTEMTIME st_localtz;
956
957
958
TIME_ZONE_INFORMATION tzi;
DWORD tzid;
PHYSFS_sint64 retval;
959
960
struct tm tm;
961
962
963
BAIL_IF_MACRO(!FileTimeToSystemTime(ft, &st_utc), win32strerror(), -1);
tzid = GetTimeZoneInformation(&tzi);
BAIL_IF_MACRO(tzid == TIME_ZONE_ID_INVALID, win32strerror(), -1);
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* (This API is unsupported and fails on non-NT systems. */
if (!SystemTimeToTzSpecificLocalTime(&tzi, &st_utc, &st_localtz))
{
/* do it by hand. Grumble... */
ULARGE_INTEGER ui64;
FILETIME new_ft;
ui64.LowPart = ft->dwLowDateTime;
ui64.HighPart = ft->dwHighDateTime;
if (tzid == TIME_ZONE_ID_STANDARD)
tzi.Bias += tzi.StandardBias;
else if (tzid == TIME_ZONE_ID_DAYLIGHT)
tzi.Bias += tzi.DaylightBias;
/* convert from minutes to 100-nanosecond increments... */
#if 0 /* For compilers that puke on 64-bit math. */
/* goddamn this is inefficient... */
while (tzi.Bias > 0)
{
DWORD tmp = ui64.LowPart - 60000000;
if ((ui64.LowPart < tmp) && (tmp > 60000000))
ui64.HighPart--;
ui64.LowPart = tmp;
tzi.Bias--;
} /* while */
while (tzi.Bias < 0)
{
DWORD tmp = ui64.LowPart + 60000000;
if ((ui64.LowPart > tmp) && (tmp < 60000000))
ui64.HighPart++;
ui64.LowPart = tmp;
tzi.Bias++;
} /* while */
#else
ui64.QuadPart -= (((LONGLONG) tzi.Bias) * (600000000));