[PATCH v4] gdi32: Create the registry keys recursively, if needed.

[Gabriel Ivăncescu]

Fixes a regression introduced by 1cdc74b2d62d1c94005c46f9c8f4b566aa8bdcbd
when creating new prefixes, as NtCreateKey does not recursively create keys.

Signed-off-by: Gabriel Ivăncescu <gabrielopcode(a)gmail.com>
---
 dlls/gdi32/font.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/dlls/gdi32/font.c b/dlls/gdi32/font.c
index 98c70a6..9b3d3e2 100644
--- a/dlls/gdi32/font.c
+++ b/dlls/gdi32/font.c
@@ -29,6 +29,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
+#include "ntstatus.h"
+#define WIN32_NO_STATUS
 #include "winerror.h"
 #include "windef.h"
 #include "winbase.h"
@@ -569,11 +571,13 @@ static HKEY reg_open_key( HKEY root, const WCHAR *name, ULONG name_len )
     return ret;
 }
 
+/* wrapper for NtCreateKey that creates the key recursively if necessary */
 static HKEY reg_create_key( HKEY root, const WCHAR *name, ULONG name_len,
                             DWORD options, DWORD *disposition )
 {
     UNICODE_STRING nameW = { name_len, name_len, (WCHAR *)name };
     OBJECT_ATTRIBUTES attr;
+    NTSTATUS status;
     HANDLE ret;
 
     attr.Length = sizeof(attr);
@@ -583,7 +587,32 @@ static HKEY reg_create_key( HKEY root, const WCHAR *name, ULONG name_len,
     attr.SecurityDescriptor = NULL;
     attr.SecurityQualityOfService = NULL;
 
-    if (NtCreateKey( &ret, MAXIMUM_ALLOWED, &attr, 0, NULL, options, disposition )) return 0;
+    status = NtCreateKey( &ret, MAXIMUM_ALLOWED, &attr, 0, NULL, options, disposition );
+    if (status == STATUS_OBJECT_NAME_NOT_FOUND)
+    {
+        static const WCHAR registry_rootW[] = { '\\','R','e','g','i','s','t','r','y','\\' };
+        DWORD pos = 0, i = 0, len = name_len / sizeof(WCHAR);
+
+        /* don't try to create registry root */
+        if (!root && len > 10 && !memcmp( name, registry_rootW, 10 )) i += 10;
+
+        while (i < len && name[i] != '\\') i++;
+        if (i == len) return 0;
+        for (;;)
+        {
+            nameW.Buffer = (WCHAR *)name + pos;
+            nameW.Length = (i - pos) * sizeof(WCHAR);
+            status = NtCreateKey( &ret, MAXIMUM_ALLOWED, &attr, 0, NULL, options, disposition );
+
+            if (attr.RootDirectory != root) NtClose( attr.RootDirectory );
+            if (!NT_SUCCESS(status)) return 0;
+            if (i == len) break;
+            attr.RootDirectory = ret;
+            while (i < len && name[i] == '\\') i++;
+            pos = i;
+            while (i < len && name[i] != '\\') i++;
+        }
+    }
     return ret;
 }
 
-- 
2.31.1