/
win32.c
1070 lines (863 loc) · 29.8 KB
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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_GOTMODFN_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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return(GetFileAttributes(fname) != INVALID_FILE_ATTRIBUTES);
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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 */
685
686
687
688
int __PHYSFS_platformDeinit(void)
{
689
if (userDir != NULL)
690
{
691
692
free(userDir);
userDir = NULL;
693
} /* if */
694
695
696
697
698
699
700
if (libKernel32)
{
FreeLibrary(libKernel32);
libKernel32 = NULL;
} /* if */
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
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)
717
{
718
719
CloseHandle(fileHandle);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
720
} /* if */
721
722
723
724
725
726
retval->readonly = rdonly;
retval->handle = fileHandle;
return(retval);
} /* doOpen */
727
728
729
void *__PHYSFS_platformOpenRead(const char *filename)
{
730
731
return(doOpen(filename, GENERIC_READ, OPEN_EXISTING, 1));
} /* __PHYSFS_platformOpenRead */
732
733
734
735
void *__PHYSFS_platformOpenWrite(const char *filename)
{
736
737
return(doOpen(filename, GENERIC_WRITE, CREATE_ALWAYS, 0));
} /* __PHYSFS_platformOpenWrite */
738
739
740
741
void *__PHYSFS_platformOpenAppend(const char *filename)
{
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
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 */
757
758
759
760
761
PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
762
HANDLE FileHandle = ((win32file *) opaque)->handle;
763
764
765
766
DWORD CountOfBytesRead;
PHYSFS_sint64 retval;
/* Read data from the file */
767
/* !!! FIXME: uint32 might be a greater # than DWORD */
768
769
if(!ReadFile(FileHandle, buffer, count * size, &CountOfBytesRead, NULL))
{
770
771
BAIL_MACRO(win32strerror(), -1);
} /* if */
772
773
774
else
{
/* Return the number of "objects" read. */
775
/* !!! FIXME: What if not the right amount of bytes was read to make an object? */
776
retval = CountOfBytesRead / size;
777
} /* else */
778
779
780
781
return(retval);
} /* __PHYSFS_platformRead */
782
783
PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
784
785
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
786
HANDLE FileHandle = ((win32file *) opaque)->handle;
787
788
789
790
DWORD CountOfBytesWritten;
PHYSFS_sint64 retval;
/* Read data from the file */
791
/* !!! FIXME: uint32 might be a greater # than DWORD */
792
793
if(!WriteFile(FileHandle, buffer, count * size, &CountOfBytesWritten, NULL))
{
794
795
BAIL_MACRO(win32strerror(), -1);
} /* if */
796
797
798
else
{
/* Return the number of "objects" read. */
799
/* !!! FIXME: What if not the right number of bytes was written? */
800
retval = CountOfBytesWritten / size;
801
} /* else */
802
803
804
805
return(retval);
} /* __PHYSFS_platformWrite */
806
807
808
int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
809
HANDLE FileHandle = ((win32file *) opaque)->handle;
810
DWORD HighOrderPos;
811
DWORD rc;
812
813
814
815
/* Get the high order 32-bits of the position */
HighOrderPos = HIGHORDER_UINT64(pos);
816
/* !!! FIXME: SetFilePointer needs a signed 64-bit value. */
817
/* Move pointer "pos" count from start of file */
818
819
rc = SetFilePointer(FileHandle, LOWORDER_UINT64(pos),
&HighOrderPos, FILE_BEGIN);
820
821
822
823
824
825
if ((rc == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
BAIL_MACRO(win32strerror(), 0);
return(1); /* No error occured */
} /* __PHYSFS_platformSeek */
826
827
828
829
PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
830
831
832
HANDLE FileHandle = ((win32file *) opaque)->handle;
DWORD HighPos = 0;
DWORD LowPos;
833
834
835
PHYSFS_sint64 retval;
/* Get current position */
836
837
LowPos = SetFilePointer(FileHandle, 0, &HighPos, FILE_CURRENT);
if ((LowPos == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
838
{
839
840
BAIL_MACRO(win32strerror(), 0);
} /* if */
841
842
843
else
{
/* Combine the high/low order to create the 64-bit position value */
844
845
846
847
848
849
retval = (((PHYSFS_uint64) HighPos) << 32) | LowPos;
assert(retval >= 0);
} /* else */
return(retval);
} /* __PHYSFS_platformTell */
850
851
852
PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
853
{
854
855
856
HANDLE FileHandle = ((win32file *) opaque)->handle;
DWORD SizeHigh;
DWORD SizeLow;
857
858
PHYSFS_sint64 retval;
859
860
SizeLow = GetFileSize(FileHandle, &SizeHigh);
if ((SizeLow == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
861
{
862
863
BAIL_MACRO(win32strerror(), -1);
} /* if */
864
865
866
else
{
/* Combine the high/low order to create the 64-bit position value */
867
868
retval = (((PHYSFS_uint64) SizeHigh) << 32) | SizeLow;
assert(retval >= 0);
869
} /* else */
870
871
872
873
return(retval);
} /* __PHYSFS_platformFileLength */
874
875
876
877
878
879
880
int __PHYSFS_platformEOF(void *opaque)
{
PHYSFS_sint64 FilePosition;
int retval = 0;
/* Get the current position in the file */
881
if ((FilePosition = __PHYSFS_platformTell(opaque)) != 0)
882
{
883
884
/* Non-zero if EOF is equal to the file length */
retval = FilePosition == __PHYSFS_platformFileLength(opaque);
885
886
887
888
} /* if */
return(retval);
} /* __PHYSFS_platformEOF */
889
890
891
892
int __PHYSFS_platformFlush(void *opaque)
{
893
894
895
win32file *fh = ((win32file *) opaque);
if (!fh->readonly)
BAIL_IF_MACRO(!FlushFileBuffers(fh->handle), win32strerror(), 0);
896
897
898
return(1);
} /* __PHYSFS_platformFlush */
899
900
901
902
int __PHYSFS_platformClose(void *opaque)
{
903
904
905
906
907
HANDLE FileHandle = ((win32file *) opaque)->handle;
BAIL_IF_MACRO(!CloseHandle(FileHandle), win32strerror(), 0);
free(opaque);
return(1);
} /* __PHYSFS_platformClose */
908
909
910
911
912
int __PHYSFS_platformDelete(const char *path)
{
/* If filename is a folder */
913
if (GetFileAttributes(path) == FILE_ATTRIBUTE_DIRECTORY)
914
{
915
916
BAIL_IF_MACRO(!RemoveDirectory(path), win32strerror(), 0);
} /* if */
917
918
else
{
919
920
BAIL_IF_MACRO(!DeleteFile(path), win32strerror(), 0);
} /* else */
921
922
923
return(1); /* if you got here, it worked. */
} /* __PHYSFS_platformDelete */
924
925
926
927
void *__PHYSFS_platformCreateMutex(void)
{
928
929
930
return((void *) CreateMutex(NULL, FALSE, NULL));
} /* __PHYSFS_platformCreateMutex */
931
932
933
void __PHYSFS_platformDestroyMutex(void *mutex)
{
934
935
936
CloseHandle((HANDLE) mutex);
} /* __PHYSFS_platformDestroyMutex */
937
938
939
int __PHYSFS_platformGrabMutex(void *mutex)
{
940
941
return(WaitForSingleObject((HANDLE) mutex, INFINITE) != WAIT_FAILED);
} /* __PHYSFS_platformGrabMutex */
942
943
944
945
void __PHYSFS_platformReleaseMutex(void *mutex)
{
946
947
948
ReleaseMutex((HANDLE) mutex);
} /* __PHYSFS_platformReleaseMutex */
949
950
static PHYSFS_sint64 FileTimeToPhysfsTime(const FILETIME *ft)
951
952
953
{
SYSTEMTIME st_utc;
SYSTEMTIME st_localtz;
954
955
956
TIME_ZONE_INFORMATION tzi;
DWORD tzid;
PHYSFS_sint64 retval;
957
958
struct tm tm;
959
960
961
BAIL_IF_MACRO(!FileTimeToSystemTime(ft, &st_utc), win32strerror(), -1);
tzid = GetTimeZoneInformation(&tzi);
BAIL_IF_MACRO(tzid == TIME_ZONE_ID_INVALID, win32strerror(), -1);
962
963
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));
#endif