Changeset 75042 in vbox for trunk/src/VBox/Runtime/r0drv

Timestamp:

Oct 24, 2018 2:02:37 PM (6 years ago)

Author:

vboxsync

Message:

IPRT/r0drv/darwin: Implemented RTFileSeek. bugref:9232

File:

• trunk/src/VBox/Runtime/r0drv/darwin/fileio-r0drv-darwin.cpp (modified) (1 diff)

trunk/src/VBox/Runtime/r0drv/darwin/fileio-r0drv-darwin.cpp

@@ -266 +266 @@
 }
 
+
+RTDECL(int) RTFileSeek(RTFILE hFile, int64_t offSeek, unsigned uMethod, uint64_t *poffActual)
+{
+    RTFILEINT *pThis = hFile;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertReturn(pThis->u32Magic == RTFILE_MAGIC, VERR_INVALID_HANDLE);
+
+    uint64_t offNew;
+    switch (uMethod)
+    {
+        case RTFILE_SEEK_BEGIN:
+            AssertReturn(offSeek >= 0, VERR_NEGATIVE_SEEK);
+            offNew = offSeek;
+            break;
+
+        case RTFILE_SEEK_CURRENT:
+            offNew = pThis->offFile + offSeek;
+            break;
+
+        case RTFILE_SEEK_END:
+        {
+            uint64_t cbFile = 0;
+            int rc = RTFileGetSize(hFile, &cbFile);
+            if (RT_SUCCESS(rc))
+                offNew = cbFile + offSeek;
+            else
+                return rc;
+            break;
+        }
+
+        default:
+            return VERR_INVALID_PARAMETER;
+    }
+
+    if ((RTFOFF)offNew > 0)
+    {
+        pThis->offFile = offNew;
+        if (poffActual)
+            *poffActual = offNew;
+        return VINF_SUCCESS;
+    }
+    return VERR_NEGATIVE_SEEK;
+}
+