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msi: Use integers internally for MSIDBOPEN constants. 

This fixes a bug where some verions of mingw and probably gcc
assume that the result of pointer subtraction will be non-NULL,
causing MSI_OpenDatabaseW to break when given the mode
MSIDBOPEN_READONLY + MSIDBOPEN_PATCHFILE.

Signed-off-by: Vincent Povirk <vincent@codeweavers.com>
Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Vincent Povirk 2019-11-04 15:05:42 -06:00 committed by Alexandre Julliard
parent 3dadd980bf
commit cce9a5f124
3 changed files with 33 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
dlls/msi/database.c
View File

@ -144,7 +144,8 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
HRESULT r;
MSIDATABASE *db = NULL;
UINT ret = ERROR_FUNCTION_FAILED;
LPCWSTR szMode, save_path;
LPCWSTR save_path;
UINT mode;
STATSTG stat;
BOOL created = FALSE, patch = FALSE;
WCHAR path[MAX_PATH];
@ -154,31 +155,34 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
if( !pdb )
return ERROR_INVALID_PARAMETER;
if (szPersist - MSIDBOPEN_PATCHFILE <= MSIDBOPEN_CREATEDIRECT)
{
TRACE("Database is a patch\n");
szPersist -= MSIDBOPEN_PATCHFILE;
patch = TRUE;
}
save_path = szDBPath;
szMode = szPersist;
if( !IS_INTMSIDBOPEN(szPersist) )
if ( IS_INTMSIDBOPEN(szPersist) )
{
mode = LOWORD(szPersist);
}
else
{
if (!CopyFileW( szDBPath, szPersist, FALSE ))
return ERROR_OPEN_FAILED;
szDBPath = szPersist;
szPersist = MSIDBOPEN_TRANSACT;
mode = MSI_OPEN_TRANSACT;
created = TRUE;
}
if( szPersist == MSIDBOPEN_READONLY )
if ((mode & MSI_OPEN_PATCHFILE) == MSI_OPEN_PATCHFILE)
{
TRACE("Database is a patch\n");
mode &= ~MSI_OPEN_PATCHFILE;
patch = TRUE;
}
if( mode == MSI_OPEN_READONLY )
{
r = StgOpenStorage( szDBPath, NULL,
STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE, NULL, 0, &stg);
}
else if( szPersist == MSIDBOPEN_CREATE )
else if( mode == MSI_OPEN_CREATE )
{
r = StgCreateDocfile( szDBPath,
STGM_CREATE|STGM_TRANSACTED|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, 0, &stg );
@ -187,7 +191,7 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
r = db_initialize( stg, patch ? &CLSID_MsiPatch : &CLSID_MsiDatabase );
created = TRUE;
}
else if( szPersist == MSIDBOPEN_CREATEDIRECT )
else if( mode == MSI_OPEN_CREATEDIRECT )
{
r = StgCreateDocfile( szDBPath,
STGM_CREATE|STGM_DIRECT|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, 0, &stg );
@ -196,19 +200,19 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
r = db_initialize( stg, patch ? &CLSID_MsiPatch : &CLSID_MsiDatabase );
created = TRUE;
}
else if( szPersist == MSIDBOPEN_TRANSACT )
else if( mode == MSI_OPEN_TRANSACT )
{
r = StgOpenStorage( szDBPath, NULL,
STGM_TRANSACTED|STGM_READWRITE|STGM_SHARE_DENY_WRITE, NULL, 0, &stg);
}
else if( szPersist == MSIDBOPEN_DIRECT )
else if( mode == MSI_OPEN_DIRECT )
{
r = StgOpenStorage( szDBPath, NULL,
STGM_DIRECT|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, NULL, 0, &stg);
}
else
{
ERR("unknown flag %p\n",szPersist);
ERR("unknown flag %x\n",mode);
return ERROR_INVALID_PARAMETER;
}
@ -267,7 +271,7 @@ UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
enum_stream_names( stg );
db->storage = stg;
db->mode = szMode;
db->mode = mode;
if (created)
db->deletefile = strdupW( szDBPath );
list_init( &db->tables );
@ -1977,7 +1981,7 @@ MSIDBSTATE WINAPI MsiGetDatabaseState( MSIHANDLE handle )
if (!(db = msihandle2msiinfo( handle, MSIHANDLETYPE_DATABASE )))
return MSIDBSTATE_ERROR;
if (db->mode != MSIDBOPEN_READONLY )
if (db->mode != MSI_OPEN_READONLY )
ret = MSIDBSTATE_WRITE;
msiobj_release( &db->hdr );

10
dlls/msi/msipriv.h
View File

@ -95,6 +95,14 @@ typedef struct tagMSITRANSFORM
IStorage *stg;
} MSITRANSFORM;
/* integer versions of the MSIDBOPEN_* constants */
#define MSI_OPEN_READONLY 0
#define MSI_OPEN_TRANSACT 1
#define MSI_OPEN_DIRECT 2
#define MSI_OPEN_CREATE 3
#define MSI_OPEN_CREATEDIRECT 4
#define MSI_OPEN_PATCHFILE 32
typedef struct tagMSIDATABASE
{
MSIOBJECTHDR hdr;
@ -104,7 +112,7 @@ typedef struct tagMSIDATABASE
LPWSTR path;
LPWSTR deletefile;
LPWSTR tempfolder;
LPCWSTR mode;
UINT mode;
UINT media_transform_offset;
UINT media_transform_disk_id;
struct list tables;

2
dlls/msi/msiquery.c
View File

@ -981,7 +981,7 @@ UINT WINAPI MsiDatabaseCommit( MSIHANDLE hdb )
return ERROR_SUCCESS;
}
if (db->mode == MSIDBOPEN_READONLY)
if (db->mode == MSI_OPEN_READONLY)
{
msiobj_release( &db->hdr );
return ERROR_SUCCESS;