From: drh <>
Date: Wed, 13 May 2026 20:06:08 +0000 (+0000)
Subject: Additional changes to the Windows VFS to try to get the system to a point
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=a8fdc0e0c09aa07f00e64b2f433ef575d33069b1;p=thirdparty%2Fsqlite.git

Additional changes to the Windows VFS to try to get the system to a point
where it will compile for UWP.

FossilOrigin-Name: 3ddc07110dacef98c14b852dcdc4f11d1c0f4061008bf3a61e2df707b0dc6c6b
---

diff --git a/manifest b/manifest
index f850709b76..c1afc7c94a 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Change\sto\scompile-time\soption\sthat\somits\snon-UWP\ssystem\scalls\sto\nSQLITE_UWP.\s\sTakes\ssteps\sto\seliminate\sall\snon-UWP\ssystem\scalls\swhen\sthat\ncompile-time\soption\sis\sused.
-D 2026-05-13T18:07:01.202
+C Additional\schanges\sto\sthe\sWindows\sVFS\sto\stry\sto\sget\sthe\ssystem\sto\sa\spoint\nwhere\sit\swill\scompile\sfor\sUWP.
+D 2026-05-13T20:06:08.009
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -722,7 +722,7 @@ F src/os_common.h 6c0eb8dd40ef3e12fe585a13e709710267a258e2c8dd1c40b1948a1d14582e
 F src/os_kv.c e7d96727db5b67e39d590a68cc61c86daf4c093c36c011a09ebfb521182ec28d
 F src/os_setup.h 8efc64eda6a6c2f221387eefc2e7e45fd5a3d5c8337a7a83519ba4fbd2957ae2
 F src/os_unix.c a07dce662f6c4e18098f6faa9f7ec7cf311f56ee9151bed2aad4dcd55852c9e2
-F src/os_win.c c9e1a153e9060a9ce98ae447b305f74dbd619dc62f1e52c52f25f0709031554d
+F src/os_win.c 40d27b5172a1c717e4a425d91481c816f6cd8d896ea8ff76cc97762e15c63726
 F src/os_win.h c06ccc3a090cf54202ea58981c298817f3309d4c9e4d52ad0a02927346493721
 F src/pager.c fbec9063ea139dfa5d94ce540671752b89f8e8dc38f8a1f614bab1aa04a2dd40
 F src/pager.h 6137149346e6c8a3ddc1eeb40aee46381e9bc8b0fcc6dda8a1efde993c2275b8
@@ -2205,8 +2205,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P 3c51436b43ab77b88134851a2773147b49a3c4fb5b0416db5e318b6e12d3b708
-R 0f25f96371c055952175c297cbaf04d6
+P b167c4c96e6a753952eb4be95d6283b50a9c59f4ecf59d60cf10d8de9cb115d8
+R f066d4eda59be22d296a3e1a1cf73d03
 U drh
-Z 021116e6f51fa817faa469cbfc4eae38
+Z 5430e3ed6629c616c0df3c5d9bb8cb87
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 2596d6aaf3..8a005ec6eb 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-b167c4c96e6a753952eb4be95d6283b50a9c59f4ecf59d60cf10d8de9cb115d8
+3ddc07110dacef98c14b852dcdc4f11d1c0f4061008bf3a61e2df707b0dc6c6b
diff --git a/src/os_win.c b/src/os_win.c
index 969c617d82..b0d1e128b9 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -410,7 +410,7 @@ static struct win_syscall {
 #define osFormatMessageW ((DWORD(WINAPI*)(DWORD,LPCVOID,DWORD,DWORD,LPWSTR, \
         DWORD,va_list*))aSyscall[7].pCurrent)
 
-#if !defined(SQLITE_OMIT_LOAD_EXTENSION)
+#if !defined(SQLITE_OMIT_LOAD_EXTENSION) && !defined(SQLITE_UWP)
   { "FreeLibrary",             (SYSCALL)FreeLibrary,             0 },
 #else
   { "FreeLibrary",             (SYSCALL)0,                       0 },
@@ -428,8 +428,9 @@ static struct win_syscall {
 #define osGetFileAttributesExW ((BOOL(WINAPI*)(LPCWSTR,GET_FILEEX_INFO_LEVELS, \
         LPVOID))aSyscall[11].pCurrent)
 
-  { "GetFileSize",             (SYSCALL)GetFileSize,             0 },
-#define osGetFileSize ((DWORD(WINAPI*)(HANDLE,LPDWORD))aSyscall[12].pCurrent)
+  { "GetFileSizeEx",           (SYSCALL)GetFileSizeEx,           0 },
+#define osGetFileSizeEx ((BOOL(WINAPI*)(HANDLE, \
+                        PLARGE_INTEGER))aSyscall[12].pCurrent)
 
   { "GetFullPathNameW",        (SYSCALL)GetFullPathNameW,        0 },
 #define osGetFullPathNameW ((DWORD(WINAPI*)(LPCWSTR,DWORD,LPWSTR, \
@@ -438,7 +439,7 @@ static struct win_syscall {
   { "GetLastError",            (SYSCALL)GetLastError,            0 },
 #define osGetLastError ((DWORD(WINAPI*)(VOID))aSyscall[14].pCurrent)
 
-#if !defined(SQLITE_OMIT_LOAD_EXTENSION)
+#if !defined(SQLITE_OMIT_LOAD_EXTENSION) && !defined(SQLITE_UWP)
   { "GetProcAddressA",         (SYSCALL)GetProcAddress,          0 },
 #else
   { "GetProcAddressA",         (SYSCALL)0,                       0 },
@@ -525,7 +526,7 @@ static struct win_syscall {
 #define osHeapCompact ((UINT(WINAPI*)(HANDLE,DWORD))aSyscall[27].pCurrent)
 
 
-#if !defined(SQLITE_OMIT_LOAD_EXTENSION)
+#if !defined(SQLITE_OMIT_LOAD_EXTENSION) && !defined(SQLITE_UWP)
   { "LoadLibraryW",            (SYSCALL)LoadLibraryW,            0 },
 #else
   { "LoadLibraryW",            (SYSCALL)0,                       0 },
@@ -572,9 +573,9 @@ static struct win_syscall {
   { "SetEndOfFile",            (SYSCALL)SetEndOfFile,            0 },
 #define osSetEndOfFile ((BOOL(WINAPI*)(HANDLE))aSyscall[36].pCurrent)
 
-  { "SetFilePointer",          (SYSCALL)SetFilePointer,          0 },
-#define osSetFilePointer ((DWORD(WINAPI*)(HANDLE,LONG,PLONG, \
-        DWORD))aSyscall[37].pCurrent)
+  { "SetFilePointerEx",        (SYSCALL)SetFilePointerEx,        0 },
+#define osSetFilePointerEx ((BOOL(WINAPI*)(HANDLE,LARGE_INTEGER,\
+        PLARGE_INTEGER,DWORD))aSyscall[37].pCurrent)
 
   { "Sleep",                   (SYSCALL)Sleep,                   0 },
 #define osSleep ((VOID(WINAPI*)(DWORD))aSyscall[38].pCurrent)
@@ -1754,27 +1755,11 @@ static int winHandleUnlock(HANDLE h, int iOff, int nByte){
 */
 static int winHandleSeek(HANDLE h, sqlite3_int64 iOffset){
   int rc = SQLITE_OK;             /* Return value */
+  LARGE_INTEGER x;                /* The offset */
 
-  LONG upperBits;                 /* Most sig. 32 bits of new offset */
-  LONG lowerBits;                 /* Least sig. 32 bits of new offset */
-  DWORD dwRet;                    /* Value returned by SetFilePointer() */
-
-  upperBits = (LONG)((iOffset>>32) & 0x7fffffff);
-  lowerBits = (LONG)(iOffset & 0xffffffff);
-
-  dwRet = osSetFilePointer(h, lowerBits, &upperBits, FILE_BEGIN);
-
-  /* API oddity: If successful, SetFilePointer() returns a dword
-  ** containing the lower 32-bits of the new file-offset. Or, if it fails,
-  ** it returns INVALID_SET_FILE_POINTER. However according to MSDN,
-  ** INVALID_SET_FILE_POINTER may also be a valid new offset. So to determine
-  ** whether an error has actually occurred, it is also necessary to call
-  ** GetLastError().  */
-  if( dwRet==INVALID_SET_FILE_POINTER ){
-    DWORD lastErrno = osGetLastError();
-    if( lastErrno!=NO_ERROR ){
-      rc = SQLITE_IOERR_SEEK;
-    }
+  x.QuadPart = iOffset;
+  if( osSetFilePointerEx(h, x, 0, FILE_BEGIN)==0 ){
+    rc = SQLITE_IOERR_SEEK;
   }
   OSTRACE(("SEEK file=%p, offset=%lld rc=%s\n", h, iOffset,sqlite3ErrName(rc)));
   return rc;
@@ -2057,14 +2042,13 @@ static int winHandleTruncate(HANDLE h, sqlite3_int64 nByte){
 */
 static int winHandleSize(HANDLE h, sqlite3_int64 *pnByte){ 
   int rc = SQLITE_OK;
-  DWORD upperBits = 0;
-  DWORD lowerBits = 0;
-
+  LARGE_INTEGER x;
   assert( pnByte );
-  lowerBits = osGetFileSize(h, &upperBits);
-  *pnByte = (((sqlite3_int64)upperBits)<<32) + lowerBits;
-  if( lowerBits==INVALID_FILE_SIZE && osGetLastError()!=NO_ERROR ){
+  if( osGetFileSizeEx(h, &x)==0 ){
     rc = SQLITE_IOERR_FSTAT;
+    *pnByte = 0;
+  }else{
+    *pnByte = x.QuadPart;
   }
   return rc;
 }
@@ -2265,17 +2249,14 @@ static int winFileSize(sqlite3_file *id, sqlite3_int64 *pSize){
   SimulateIOError(return SQLITE_IOERR_FSTAT);
   OSTRACE(("SIZE file=%p, pSize=%p\n", pFile->h, pSize));
   {
-    DWORD upperBits;
-    DWORD lowerBits;
-    DWORD lastErrno;
-
-    lowerBits = osGetFileSize(pFile->h, &upperBits);
-    *pSize = (((sqlite3_int64)upperBits)<<32) + lowerBits;
-    if(   (lowerBits == INVALID_FILE_SIZE)
-       && ((lastErrno = osGetLastError())!=NO_ERROR) ){
-      pFile->lastErrno = lastErrno;
+    LARGE_INTEGER x;
+    if( osGetFileSizeEx(pFile->h, &x)==0 ){
+      *pSize = 0;
+      pFile->lastErrno = osGetLastError();
       rc = winLogError(SQLITE_IOERR_FSTAT, pFile->lastErrno,
                        "winFileSize", pFile->zPath);
+    }else{
+      *pSize = x.QuadPart;
     }
   }
   OSTRACE(("SIZE file=%p, pSize=%p, *pSize=%lld, rc=%s\n",
@@ -4986,14 +4967,14 @@ static int winFullPathname(
 ** within the shared library, and closing the shared library.
 */
 static void *winDlOpen(sqlite3_vfs *pVfs, const char *zFilename){
-  HANDLE h;
+  HANDLE h = 0;
   void *zConverted = winConvertFromUtf8Filename(zFilename);
   UNUSED_PARAMETER(pVfs);
   if( zConverted==0 ){
     OSTRACE(("DLOPEN name=%s, handle=%p\n", zFilename, (void*)0));
     return 0;
   }
-  h = osLoadLibraryW((LPCWSTR)zConverted);
+  h = osLoadLibraryW ? osLoadLibraryW((LPCWSTR)zConverted) : 0;
   OSTRACE(("DLOPEN name=%s, handle=%p\n", zFilename, (void*)h));
   sqlite3_free(zConverted);
   return (void*)h;
@@ -5003,16 +4984,16 @@ static void winDlError(sqlite3_vfs *pVfs, int nBuf, char *zBufOut){
   winGetLastErrorMsg(osGetLastError(), nBuf, zBufOut);
 }
 static void (*winDlSym(sqlite3_vfs *pVfs,void *pH,const char *zSym))(void){
-  FARPROC proc;
+  FARPROC proc = 0;
   UNUSED_PARAMETER(pVfs);
-  proc = osGetProcAddressA((HANDLE)pH, zSym);
+  proc = osGetProcAddressA ? osGetProcAddressA((HANDLE)pH, zSym) : 0;
   OSTRACE(("DLSYM handle=%p, symbol=%s, address=%p\n",
            (void*)pH, zSym, (void*)proc));
   return (void(*)(void))proc;
 }
 static void winDlClose(sqlite3_vfs *pVfs, void *pHandle){
   UNUSED_PARAMETER(pVfs);
-  osFreeLibrary((HANDLE)pHandle);
+  if( osFreeLibrary!=0 ) osFreeLibrary((HANDLE)pHandle);
   OSTRACE(("DLCLOSE handle=%p\n", (void*)pHandle));
 }
 #else /* if SQLITE_OMIT_LOAD_EXTENSION is defined: */