- Merge from trunk

[reactos.git] / dll / win32 / msi / cond.tab.c

diff --git a/dll/win32/msi/cond.tab.c b/dll/win32/msi/cond.tab.c
index 2b10d20..e68723d 100644 (file)
--- a/dll/win32/msi/cond.tab.c
+++ b/dll/win32/msi/cond.tab.c
@@ -2329,11 +2329,21 @@ static INT compare_substring( LPCWSTR a, INT operator, LPCWSTR b )
     case COND_LHS:
        return 0 == strncmpW( a, b, lstrlenW( b ) );
     case COND_RHS:
-       return 0 == lstrcmpW( a + (lstrlenW( a ) - lstrlenW( b )), b );
+    {
+        int l = lstrlenW( a );
+        int r = lstrlenW( b );
+        if (r > l) return 0;
+        return 0 == lstrcmpW( a + (l - r), b );
+    }
     case COND_ILHS:
        return 0 == strncmpiW( a, b, lstrlenW( b ) );
     case COND_IRHS:
-        return 0 == lstrcmpiW( a + (lstrlenW( a ) - lstrlenW( b )), b );
+    {
+        int l = lstrlenW( a );
+        int r = lstrlenW( b );
+        if (r > l) return 0;
+        return 0 == lstrcmpiW( a + (l - r), b );
+    }
     default:
        ERR("invalid substring operator\n");
         return 0;