1 /* $NetBSD: console.c,v 1.2 2018/09/15 16:44:15 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "efiboot.h" 30 31 static EFI_INPUT_KEY key_cur; 32 static int key_pending; 33 34 int 35 getchar(void) 36 { 37 EFI_STATUS status; 38 EFI_INPUT_KEY key; 39 40 if (key_pending) { 41 key = key_cur; 42 key_pending = 0; 43 } else { 44 status = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key); 45 while (status == EFI_NOT_READY) { 46 if (ST->ConIn->WaitForKey != NULL) 47 WaitForSingleEvent(ST->ConIn->WaitForKey, 0); 48 status = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key); 49 } 50 } 51 52 return key.UnicodeChar; 53 } 54 55 void 56 putchar(int c) 57 { 58 CHAR16 buf[2] = { c, '\0' }; 59 if (c == '\n') 60 putchar('\r'); 61 uefi_call_wrapper(ST->ConOut->OutputString, 2, ST->ConOut, buf); 62 } 63 64 int 65 ischar(void) 66 { 67 EFI_INPUT_KEY key; 68 EFI_STATUS status; 69 70 if (ST->ConIn->WaitForKey == NULL) { 71 if (key_pending) 72 return 1; 73 status = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key); 74 if (status == EFI_SUCCESS) { 75 key_cur = key; 76 key_pending = 1; 77 } 78 return key_pending; 79 } else { 80 status = uefi_call_wrapper(BS->CheckEvent, 1, ST->ConIn->WaitForKey); 81 return status == EFI_SUCCESS; 82 } 83 } 84