[3/3] msi: Avoid lstrcmpW in string lookup.

[Hans Leidekker]

---
 dlls/msi/string.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/dlls/msi/string.c b/dlls/msi/string.c
index 5802912..a7e83bf 100644
--- a/dlls/msi/string.c
+++ b/dlls/msi/string.c
@@ -376,6 +376,14 @@ static UINT msi_id2stringA( const string_table *st, UINT id, LPSTR buffer, UINT
     return ERROR_SUCCESS;
 }
 
+static inline int compare_strings( const WCHAR *str1, UINT len1, const WCHAR *str2, UINT len2 )
+{
+    if (str1 == str2) return 0;
+    if (str1 == NULL || str2 == NULL) return 1;
+    if (len1 != len2) return 1;
+    return memcmp( str1, str2, len1 * sizeof(WCHAR) );
+}
+
 /*
  *  msi_string2idW
  *
@@ -390,7 +398,7 @@ UINT msi_string2idW( const string_table *st, LPCWSTR str, UINT *id )
 
     for (n = st->hash[hash]; n != -1; n = st->strings[n].hash_next )
     {
-        if ((str == se[n].str) || (len == se[n].len && !lstrcmpW(str, se[n].str)))
+        if (!compare_strings( str, len, se[n].str, se[n].len ))
         {
             *id = n;
             return ERROR_SUCCESS;
-- 
1.6.3.3