+
+// Find the #Index element (numbered from 0) in a comma-delimited string
+// of elements.
+// Returns the found element, or NULL if Index is out of range or InString
+// is NULL. Note that the calling function is responsible for freeing the
+// memory associated with the returned string pointer.
+CHAR16 *FindCommaDelimited(IN CHAR16 *InString, IN UINTN Index) {
+ UINTN StartPos = 0, CurPos = 0;
+ BOOLEAN Found = FALSE;
+ CHAR16 *FoundString = NULL;
+
+ if (InString != NULL) {
+ // After while() loop, StartPos marks start of item #Index
+ while ((Index > 0) && (CurPos < StrLen(InString))) {
+ if (InString[CurPos] == L',') {
+ Index--;
+ StartPos = CurPos + 1;
+ } // if
+ CurPos++;
+ } // while
+ // After while() loop, CurPos is one past the end of the element
+ while ((CurPos < StrLen(InString)) && (!Found)) {
+ if (InString[CurPos] == L',')
+ Found = TRUE;
+ else
+ CurPos++;
+ } // while
+ if (Index == 0)
+ FoundString = StrDuplicate(&InString[StartPos]);
+ if (FoundString != NULL)
+ FoundString[CurPos - StartPos] = 0;
+ } // if
+ return (FoundString);
+} // CHAR16 *FindCommaDelimited()
+
+// Returns TRUE if SmallString is an element in the comma-delimited List,
+// FALSE otherwise. Performs comparison case-insensitively (except on
+// buggy EFIs with case-sensitive StriCmp() functions).
+BOOLEAN IsIn(IN CHAR16 *SmallString, IN CHAR16 *List) {
+ UINTN i = 0;
+ BOOLEAN Found = FALSE;
+ CHAR16 *OneElement;
+
+ if (SmallString && List) {
+ while (!Found && (OneElement = FindCommaDelimited(List, i++))) {
+ if (StriCmp(OneElement, SmallString) == 0)
+ Found = TRUE;
+ } // while
+ } // if
+ return Found;
+} // BOOLEAN IsIn()
+
+// Implement FreePool the way it should have been done to begin with, so that
+// it doesn't throw an ASSERT message if fed a NULL pointer....
+VOID MyFreePool(IN OUT VOID *Pointer) {
+ if (Pointer != NULL)
+ FreePool(Pointer);
+}
+
+static EFI_GUID AppleRemovableMediaGuid = APPLE_REMOVABLE_MEDIA_PROTOCOL_GUID;
+
+// Eject all removable media.
+// Returns TRUE if any media were ejected, FALSE otherwise.
+BOOLEAN EjectMedia(VOID) {
+ EFI_STATUS Status;
+ UINTN HandleIndex, HandleCount = 0, Ejected = 0;
+ EFI_HANDLE *Handles, Handle;
+ APPLE_REMOVABLE_MEDIA_PROTOCOL *Ejectable;
+
+ Status = LibLocateHandle(ByProtocol, &AppleRemovableMediaGuid, NULL, &HandleCount, &Handles);
+ if (EFI_ERROR(Status) || HandleCount == 0)
+ return (FALSE); // probably not an Apple system
+
+ for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
+ Handle = Handles[HandleIndex];
+ Status = refit_call3_wrapper(BS->HandleProtocol, Handle, &AppleRemovableMediaGuid, (VOID **) &Ejectable);
+ if (EFI_ERROR(Status))
+ continue;
+ Status = refit_call1_wrapper(Ejectable->Eject, Ejectable);
+ if (!EFI_ERROR(Status))
+ Ejected++;
+ }
+ MyFreePool(Handles);
+ return (Ejected > 0);
+} // VOID EjectMedia()
+
+
+// Return the GUID as a string, suitable for display to the user. Note that the calling
+// function is responsible for freeing the allocated memory.
+CHAR16 * GuidAsString(EFI_GUID *GuidData) {
+ CHAR16 *TheString;
+
+ TheString = AllocateZeroPool(42 * sizeof(CHAR16));
+ if (TheString != 0) {
+ SPrint (TheString, 82, L"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+ (UINTN)GuidData->Data1, (UINTN)GuidData->Data2, (UINTN)GuidData->Data3,
+ (UINTN)GuidData->Data4[0], (UINTN)GuidData->Data4[1], (UINTN)GuidData->Data4[2],
+ (UINTN)GuidData->Data4[3], (UINTN)GuidData->Data4[4], (UINTN)GuidData->Data4[5],
+ (UINTN)GuidData->Data4[6], (UINTN)GuidData->Data4[7]);
+ }
+ return TheString;
+} // GuidAsString(EFI_GUID *GuidData)