core/menu.c


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/*
 * Copyright (c) 2026, Apollo Telephone Laboratories.
 * Provided under the BSD-3 clause.
 */

#include <sboot/sboot.h>
#include <sboot/fwi.h>
#include <sboot/config.h>

#define MENU_CLEAR() \
    Print(L"\r\t\t\t\t\t\t\r")
#define MENU_WRITE(ENTRY) \
    Print(L"<-- %s -->", (ENTRY)->Name);

VOID
SBootMenu(OUT BOOT_ENTRY *Entry)
{
    EFI_INPUT_KEY Key;
    UINTN CurrentEntryIndex;
    BOOT_ENTRY *CurrentEntry;
    EFI_STATUS Status;
    BOOLEAN Run = TRUE;

    Print(L" ===== USE LEFT/RIGHT ARROW KEYS TO SELECT ====\n\n");
    CurrentEntryIndex = 0;
    CurrentEntry = &ConfigBootEntries[CurrentEntryIndex];
    MENU_WRITE(CurrentEntry);

    while (Run) {
        Status = uefi_call_wrapper(gST->ConIn->ReadKeyStroke, 2, gST->ConIn, &Key);
        if (EFI_ERROR(Status)) {
            continue;
        }

        switch (Key.ScanCode) {
        case 0x0:
            Run = FALSE;
            continue;
        case SCAN_RIGHT:
            if (CurrentEntryIndex < NELEM(ConfigBootEntries) - 2) {
                ++CurrentEntryIndex;
                CurrentEntry = &ConfigBootEntries[CurrentEntryIndex];
                MENU_CLEAR();
                MENU_WRITE(CurrentEntry);
            }
            break;
        case SCAN_LEFT:
            if (CurrentEntryIndex == 0)
                continue;

            --CurrentEntryIndex;
            CurrentEntry = &ConfigBootEntries[CurrentEntryIndex];
            MENU_CLEAR();
            MENU_WRITE(CurrentEntry);
            break;
        }
    }

    Print(L"\nBooting %s (%s)\n", CurrentEntry->Name, CurrentEntry->BootPath);
    *Entry = *CurrentEntry;
}