Zebediah Figura : msi: Round costs up to 4096 bytes instead of clamping.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9725a2286acdb791de316295d9bcb11411a3fd56
URL:    https://gitlab.winehq.org/wine/wine/-/commit/9725a2286acdb791de316295d9bcb11...

Author: Zebediah Figura 
Date:   Sat Mar  2 15:06:31 2024 -0600

msi: Round costs up to 4096 bytes instead of clamping.

---

dlls/msi/msi.c           | 4 ++--
 dlls/msi/msipriv.h       | 7 +++++++
 dlls/msi/tests/package.c | 2 +-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/dlls/msi/msi.c b/dlls/msi/msi.c
index 2b821d08cf5..611399a8fb0 100644
--- a/dlls/msi/msi.c
+++ b/dlls/msi/msi.c
@@ -2037,14 +2037,14 @@ UINT WINAPI MsiEnumComponentCostsW( MSIHANDLE handle, const WCHAR *component, DW
         }
         else if ((file = msi_get_loaded_file( package, comp->KeyPath )))
         {
-            *cost = max( 8, comp->Cost / 512 );
+            *cost = cost_from_size( comp->Cost );
             *buflen = set_drive( drive, file->TargetPath[0] );
             r = ERROR_SUCCESS;
         }
     }
     else if (IStorage_Stat( package->db->storage, &stat, STATFLAG_NONAME ) == S_OK)
     {
-        *temp = max( 8, stat.cbSize.QuadPart / 512 );
+        *temp = cost_from_size( stat.cbSize.QuadPart );
         *buflen = set_drive( drive, path[0] );
         r = ERROR_SUCCESS;
     }
diff --git a/dlls/msi/msipriv.h b/dlls/msi/msipriv.h
index 4c2f2ae2589..588aa9a7487 100644
--- a/dlls/msi/msipriv.h
+++ b/dlls/msi/msipriv.h
@@ -1194,4 +1194,11 @@ static inline LPWSTR strdupUtoW( LPCSTR str )
     return ret;
 }

+static inline int cost_from_size( int size )
+{
+    /* Cost is size rounded up to the nearest 4096 bytes,
+     * expressed in units of 512 bytes. */
+    return ((size + 4095) & ~4095) / 512;
+}
+
 #endif /* __WINE_MSI_PRIVATE__ */
diff --git a/dlls/msi/tests/package.c b/dlls/msi/tests/package.c
index 9f15bc37520..9257a835891 100644
--- a/dlls/msi/tests/package.c
+++ b/dlls/msi/tests/package.c
@@ -8628,7 +8628,7 @@ static void test_costs(void)
     ok( len == 2, "expected len == 2, got %lu\n", len );
     ok( drive[0], "expected a drive\n" );
     ok( !cost, "expected cost == 0, got %d\n", cost );
-    ok( temp && temp != 0xdead, "expected temp > 0, got %d\n", temp );
+    todo_wine ok( temp && temp != 0xdead, "expected temp > 0, got %d\n", temp );

/* increased index */
     len = sizeof(drive);