/
win32.c
1132 lines (916 loc) · 31 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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#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
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#if (defined _MSC_VER)
#define alloca(x) _alloca(x)
#elif (defined MINGW) /* scary...hopefully this is okay. */
#define alloca(x) __builtin_alloca(x)
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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) >> 32) & 0x00000000FFFFFFFF)
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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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#define PHYSFS_INVALID_SET_FILE_POINTER 0xFFFFFFFF
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/* just in case... */
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#define PHYSFS_INVALID_FILE_ATTRIBUTES 0xFFFFFFFF
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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 appearing 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)
{
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if ((argv0 != NULL) && (strchr(argv0, '\\') != NULL))
return(NULL); /* default behaviour can handle this. */
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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 */
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int __PHYSFS_platformStrnicmp(const char *x, const char *y, PHYSFS_uint32 len)
{
#if (defined _MSC_VER)
return(strnicmp(x, y, (int) len));
#else
int ux, uy;
if (!len)
return(0);
do
{
ux = toupper((int) *x);
uy = toupper((int) *y);
if (ux > uy)
return(1);
else if (ux < uy)
return(-1);
x++;
y++;
len--;
} while ((ux) && (uy) && (len));
return(0);
#endif
} /* __PHYSFS_platformStricmp */
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int __PHYSFS_platformExists(const char *fname)
{
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BAIL_IF_MACRO
(
GetFileAttributes(fname) == PHYSFS_INVALID_FILE_ATTRIBUTES,
win32strerror(), 0
);
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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 == PHYSFS_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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/* If this get unwieldy, make it table driven. */
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int allNeededLibrariesLoaded = 1; /* flip to zero as needed. */
690
691
692
libKernel32 = LoadLibrary("kernel32.dll");
if (libKernel32)
693
{
694
695
pGetFileAttributesEx = (LPFNGETFILEATTRIBUTESEX)
GetProcAddress(libKernel32, "GetFileAttributesExA");
696
} /* if */
697
698
699
700
701
702
/* add other DLLs here... */
/* see if there's any reason to keep kernel32.dll around... */
if (libKernel32)
703
{
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
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 */
723
724
725
726
int __PHYSFS_platformDeinit(void)
{
727
if (userDir != NULL)
728
{
729
730
free(userDir);
userDir = NULL;
731
} /* if */
732
733
734
735
736
737
738
if (libKernel32)
{
FreeLibrary(libKernel32);
libKernel32 = NULL;
} /* if */
739
740
741
742
743
744
745
746
747
748
749
750
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);
751
752
753
754
755
BAIL_IF_MACRO
(
fileHandle == PHYSFS_INVALID_HANDLE_VALUE,
win32strerror(), NULL
);
756
757
758
retval = malloc(sizeof (win32file));
if (retval == NULL)
759
{
760
761
CloseHandle(fileHandle);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
762
} /* if */
763
764
765
766
767
768
retval->readonly = rdonly;
retval->handle = fileHandle;
return(retval);
} /* doOpen */
769
770
771
void *__PHYSFS_platformOpenRead(const char *filename)
{
772
773
return(doOpen(filename, GENERIC_READ, OPEN_EXISTING, 1));
} /* __PHYSFS_platformOpenRead */
774
775
776
777
void *__PHYSFS_platformOpenWrite(const char *filename)
{
778
779
return(doOpen(filename, GENERIC_WRITE, CREATE_ALWAYS, 0));
} /* __PHYSFS_platformOpenWrite */
780
781
782
783
void *__PHYSFS_platformOpenAppend(const char *filename)
{
784
785
786
787
void *retval = doOpen(filename, GENERIC_WRITE, OPEN_ALWAYS, 0);
if (retval != NULL)
{
HANDLE h = ((win32file *) retval)->handle;
788
789
DWORD rc = SetFilePointer(h, 0, NULL, FILE_END);
if (rc == PHYSFS_INVALID_SET_FILE_POINTER)
790
791
792
793
794
795
796
797
798
799
{
const char *err = win32strerror();
CloseHandle(h);
free(retval);
BAIL_MACRO(err, NULL);
} /* if */
} /* if */
return(retval);
} /* __PHYSFS_platformOpenAppend */
800
801
802
803
804
PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
805
HANDLE FileHandle = ((win32file *) opaque)->handle;
806
807
808
809
DWORD CountOfBytesRead;
PHYSFS_sint64 retval;
/* Read data from the file */
810
/* !!! FIXME: uint32 might be a greater # than DWORD */
811
812
if(!ReadFile(FileHandle, buffer, count * size, &CountOfBytesRead, NULL))
{
813
814
BAIL_MACRO(win32strerror(), -1);
} /* if */
815
816
817
else
{
/* Return the number of "objects" read. */
818
/* !!! FIXME: What if not the right amount of bytes was read to make an object? */
819
retval = CountOfBytesRead / size;
820
} /* else */
821
822
823
824
return(retval);
} /* __PHYSFS_platformRead */
825
826
PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
827
828
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
829
HANDLE FileHandle = ((win32file *) opaque)->handle;
830
831
832
833
DWORD CountOfBytesWritten;
PHYSFS_sint64 retval;
/* Read data from the file */
834
/* !!! FIXME: uint32 might be a greater # than DWORD */
835
836
if(!WriteFile(FileHandle, buffer, count * size, &CountOfBytesWritten, NULL))
{
837
838
BAIL_MACRO(win32strerror(), -1);
} /* if */
839
840
841
else
{
/* Return the number of "objects" read. */
842
/* !!! FIXME: What if not the right number of bytes was written? */
843
retval = CountOfBytesWritten / size;
844
} /* else */
845
846
847
848
return(retval);
} /* __PHYSFS_platformWrite */
849
850
851
int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
852
HANDLE FileHandle = ((win32file *) opaque)->handle;
853
DWORD HighOrderPos;
854
DWORD *pHighOrderPos;
855
DWORD rc;
856
857
858
859
/* Get the high order 32-bits of the position */
HighOrderPos = HIGHORDER_UINT64(pos);
860
861
862
863
864
865
866
867
868
869
870
871
872
873
/*
* 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."
*/
874
/* Move pointer "pos" count from start of file */
875
rc = SetFilePointer(FileHandle, LOWORDER_UINT64(pos),
876
pHighOrderPos, FILE_BEGIN);
877
878
879
880
if ( (rc == PHYSFS_INVALID_SET_FILE_POINTER) &&
(GetLastError() != NO_ERROR) )
{
881
BAIL_MACRO(win32strerror(), 0);
882
883
} /* if */
884
885
return(1); /* No error occured */
} /* __PHYSFS_platformSeek */
886
887
888
889
PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
890
891
892
HANDLE FileHandle = ((win32file *) opaque)->handle;
DWORD HighPos = 0;
DWORD LowPos;
893
894
895
PHYSFS_sint64 retval;
/* Get current position */
896
LowPos = SetFilePointer(FileHandle, 0, &HighPos, FILE_CURRENT);
897
898
if ( (LowPos == PHYSFS_INVALID_SET_FILE_POINTER) &&
(GetLastError() != NO_ERROR) )
899
{
900
901
BAIL_MACRO(win32strerror(), 0);
} /* if */
902
903
904
else
{
/* Combine the high/low order to create the 64-bit position value */
905
906
907
908
909
910
retval = (((PHYSFS_uint64) HighPos) << 32) | LowPos;
assert(retval >= 0);
} /* else */
return(retval);
} /* __PHYSFS_platformTell */
911
912
913
PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
914
{
915
916
917
HANDLE FileHandle = ((win32file *) opaque)->handle;
DWORD SizeHigh;
DWORD SizeLow;
918
919
PHYSFS_sint64 retval;
920
SizeLow = GetFileSize(FileHandle, &SizeHigh);
921
922
if ( (SizeLow == PHYSFS_INVALID_SET_FILE_POINTER) &&
(GetLastError() != NO_ERROR) )
923
{
924
925
BAIL_MACRO(win32strerror(), -1);
} /* if */
926
927
928
else
{
/* Combine the high/low order to create the 64-bit position value */
929
930
retval = (((PHYSFS_uint64) SizeHigh) << 32) | SizeLow;
assert(retval >= 0);
931
} /* else */
932
933
934
935
return(retval);
} /* __PHYSFS_platformFileLength */
936
937
938
939
940
941
942
int __PHYSFS_platformEOF(void *opaque)
{
PHYSFS_sint64 FilePosition;
int retval = 0;
/* Get the current position in the file */
943
if ((FilePosition = __PHYSFS_platformTell(opaque)) != 0)
944
{
945
946
/* Non-zero if EOF is equal to the file length */
retval = FilePosition == __PHYSFS_platformFileLength(opaque);
947
948
949
950
} /* if */
return(retval);
} /* __PHYSFS_platformEOF */
951
952
953
954
int __PHYSFS_platformFlush(void *opaque)
{
955
956
957
win32file *fh = ((win32file *) opaque);
if (!fh->readonly)
BAIL_IF_MACRO(!FlushFileBuffers(fh->handle), win32strerror(), 0);
958
959
960
return(1);
} /* __PHYSFS_platformFlush */
961
962
963
964
int __PHYSFS_platformClose(void *opaque)
{
965
966
967
968
969
HANDLE FileHandle = ((win32file *) opaque)->handle;
BAIL_IF_MACRO(!CloseHandle(FileHandle), win32strerror(), 0);
free(opaque);
return(1);
} /* __PHYSFS_platformClose */
970
971
972
973
974
int __PHYSFS_platformDelete(const char *path)
{
/* If filename is a folder */
975
if (GetFileAttributes(path) == FILE_ATTRIBUTE_DIRECTORY)
976
{
977
978
BAIL_IF_MACRO(!RemoveDirectory(path), win32strerror(), 0);
} /* if */
979
980
else
{
981
982
BAIL_IF_MACRO(!DeleteFile(path), win32strerror(), 0);
} /* else */
983
984
985
return(1); /* if you got here, it worked. */
} /* __PHYSFS_platformDelete */
986
987
988
989
void *__PHYSFS_platformCreateMutex(void)
{
990
991
992
return((void *) CreateMutex(NULL, FALSE, NULL));
} /* __PHYSFS_platformCreateMutex */
993
994
995
void __PHYSFS_platformDestroyMutex(void *mutex)
{
996
997
998
CloseHandle((HANDLE) mutex);
} /* __PHYSFS_platformDestroyMutex */
999
1000
int __PHYSFS_platformGrabMutex(void *mutex)