84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/* $NetBSD: console.c,v 1.2 2018/09/15 16:44:15 jmcneill Exp $ */
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/*-
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* Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "efiboot.h"
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static EFI_INPUT_KEY key_cur;
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static int key_pending;
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int
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getchar(void)
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{
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EFI_STATUS status;
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EFI_INPUT_KEY key;
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if (key_pending) {
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key = key_cur;
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key_pending = 0;
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} else {
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status = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key);
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while (status == EFI_NOT_READY) {
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if (ST->ConIn->WaitForKey != NULL)
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WaitForSingleEvent(ST->ConIn->WaitForKey, 0);
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status = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key);
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}
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}
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return key.UnicodeChar;
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}
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void
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putchar(int c)
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{
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CHAR16 buf[2] = { c, '\0' };
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if (c == '\n')
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putchar('\r');
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uefi_call_wrapper(ST->ConOut->OutputString, 2, ST->ConOut, buf);
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}
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int
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ischar(void)
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{
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EFI_INPUT_KEY key;
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EFI_STATUS status;
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if (ST->ConIn->WaitForKey == NULL) {
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if (key_pending)
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return 1;
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status = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key);
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if (status == EFI_SUCCESS) {
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key_cur = key;
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key_pending = 1;
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}
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return key_pending;
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} else {
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status = uefi_call_wrapper(BS->CheckEvent, 1, ST->ConIn->WaitForKey);
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return status == EFI_SUCCESS;
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}
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}
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