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
getchar(void)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
putchar(int c)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
ischar(void)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