[PATCH v3 4/4] winmm: Search the default path when opening an existing file in create_file_OF().

[Zebediah Figura]

Based on a patch by Alistair Leslie-Hughes.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49650
Signed-off-by: Zebediah Figura 
---
 dlls/winmm/mmio.c       | 24 ++++++++++++++++++++++--
 dlls/winmm/tests/mmio.c |  2 +-
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/dlls/winmm/mmio.c b/dlls/winmm/mmio.c
index cb3175c5cd7..da536357416 100644
--- a/dlls/winmm/mmio.c
+++ b/dlls/winmm/mmio.c
@@ -51,7 +51,9 @@ static WINE_MMIO *MMIOList;
 /* From kernel32 */
 static HANDLE create_file_OF( LPCSTR path, INT mode )
 {
-    DWORD access, sharing, creation;
+    DWORD access, sharing, creation, len;
+    char *full_path;
+    HANDLE ret;

if (mode & OF_CREATE)
     {
@@ -79,7 +81,25 @@ static HANDLE create_file_OF( LPCSTR path, INT mode )
     case OF_SHARE_COMPAT:
     default:                  sharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
     }
-    return CreateFileA( path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
+
+    if (mode & OF_CREATE)
+        return CreateFileA( path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
+
+    if (!(len = SearchPathA( NULL, path, NULL, 0, NULL, NULL )))
+        return INVALID_HANDLE_VALUE;
+    if (!(full_path = malloc(len + 1)))
+    {
+        SetLastError( ERROR_OUTOFMEMORY );
+        return INVALID_HANDLE_VALUE;
+    }
+    if (!SearchPathA( NULL, path, NULL, len + 1, full_path, NULL ))
+    {
+        free(full_path);
+        return INVALID_HANDLE_VALUE;
+    }
+    ret = CreateFileA( full_path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
+    free(full_path);
+    return ret;
 }

/**************************************************************************
diff --git a/dlls/winmm/tests/mmio.c b/dlls/winmm/tests/mmio.c
index c9ceda24f3f..a232070064c 100644
--- a/dlls/winmm/tests/mmio.c
+++ b/dlls/winmm/tests/mmio.c
@@ -551,7 +551,7 @@ static void test_mmioOpen_create(void)

wcscpy(buffer, L"test_mmio_path");
     hmmio = mmioOpenW(buffer, &info, MMIO_WRITE);
-    todo_wine ok(!!hmmio, "failed to open file, error %#x\n", info.wErrorRet);
+    ok(!!hmmio, "failed to open file, error %#x\n", info.wErrorRet);
     mmioClose(hmmio, 0);

wcscpy(buffer, L"test_mmio_path");