Piotr Caban : shlwapi: Fix PathIsContentTypeA implementation.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 28f7e4615d9a02b6f556434e51568aab68edc35e
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=28f7e4615d9a02b6f556434e51568aab68edc35e

Author: Piotr Caban <piotr at codeweavers.com>
Date:   Thu Apr  4 16:01:03 2019 +0200

shlwapi: Fix PathIsContentTypeA implementation.

Signed-off-by: Piotr Caban <piotr at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/shlwapi/path.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/dlls/shlwapi/path.c b/dlls/shlwapi/path.c
index ad78c5d..1c4af7e 100644
--- a/dlls/shlwapi/path.c
+++ b/dlls/shlwapi/path.c
@@ -2027,22 +2027,18 @@ BOOL WINAPI PathIsSameRootW(LPCWSTR lpszPath1, LPCWSTR lpszPath2)
  *  a content type is registered, it is compared (case insensitively) to
  *  lpszContentType. Only if this matches does the function succeed.
  */
-BOOL WINAPI PathIsContentTypeA(LPCSTR lpszPath, LPCSTR lpszContentType)
+BOOL WINAPI PathIsContentTypeA(LPCSTR path, LPCSTR content_type)
 {
-  LPCSTR szExt;
-  DWORD dwDummy;
-  char szBuff[MAX_PATH];
+    char buf[MAX_PATH];
+    DWORD size = sizeof(buf);
+    LPCSTR ext;
 
-  TRACE("(%s,%s)\n", debugstr_a(lpszPath), debugstr_a(lpszContentType));
+    TRACE("(%s,%s)\n", debugstr_a(path), debugstr_a(content_type));
 
-  if (lpszPath && (szExt = PathFindExtensionA(lpszPath)) && *szExt &&
-      !SHGetValueA(HKEY_CLASSES_ROOT, szExt, "Content Type",
-                   REG_NONE, szBuff, &dwDummy) &&
-      !strcasecmp(lpszContentType, szBuff))
-  {
-    return TRUE;
-  }
-  return FALSE;
+    if(!path) return FALSE;
+    if(!(ext = PathFindExtensionA(path)) || !*ext) return FALSE;
+    if(SHGetValueA(HKEY_CLASSES_ROOT, ext, "Content Type", NULL, buf, &size)) return FALSE;
+    return !lstrcmpiA(content_type, buf);
 }
 
 /*************************************************************************