Akihiro Sagawa : winmm: Fix SEEK_END direction of mmio files without buffering.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 2d3f3204633388e0bba5ace02ebd370a9be1692d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=2d3f3204633388e0bba5ace02ebd370a9be1692d

Author: Akihiro Sagawa <sagawa.aki at gmail.com>
Date:   Tue Nov 13 00:26:45 2012 +0900

winmm: Fix SEEK_END direction of mmio files without buffering.

---

 dlls/winmm/mmio.c       |    5 ++++-
 dlls/winmm/tests/mmio.c |    2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/dlls/winmm/mmio.c b/dlls/winmm/mmio.c
index 7f35480..b6f60d1 100644
--- a/dlls/winmm/mmio.c
+++ b/dlls/winmm/mmio.c
@@ -127,7 +127,10 @@ static LRESULT CALLBACK mmioDosIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
 	 * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 	 * Returns: new file position, -1 on error
 	 */
-	ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
+	if (lParam2 == SEEK_END)
+	    ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], -(LONG)lParam1, (LONG)lParam2);
+	else
+	    ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
 	if (ret != -1)
 	    lpmmioinfo->lDiskOffset = ret;
 	return ret;
diff --git a/dlls/winmm/tests/mmio.c b/dlls/winmm/tests/mmio.c
index 64f0149..a4e7a2d 100644
--- a/dlls/winmm/tests/mmio.c
+++ b/dlls/winmm/tests/mmio.c
@@ -750,7 +750,7 @@ static void test_mmioSeek(void)
 
         /* seek backward from the end */
         pos = mmioSeek(hmmio, offset, SEEK_END);
-        todo_wine ok(pos == size-offset, "expected %d, got %d\n", size-offset, pos);
+        ok(pos == size-offset, "expected %d, got %d\n", size-offset, pos);
 
         mmioClose(hmmio, 0);
     }