keyboard.c

来自「package of develop dns」· C语言 代码 · 共 90 行

/*
 * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 2000, 2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: keyboard.c,v 1.4.206.1 2004/03/06 08:15:08 marka Exp $ */

#include <config.h>

#include <sys/types.h>

#include <windows.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

#include <io.h>

#include <isc/keyboard.h>
#include <isc/util.h>

isc_result_t
isc_keyboard_open(isc_keyboard_t *keyboard) {
	int fd;

	REQUIRE(keyboard != NULL);

	fd = _fileno(stdin);
	if (fd < 0)
		return (ISC_R_IOERROR);

	keyboard->fd = fd;

	keyboard->result = ISC_R_SUCCESS;

	return (ISC_R_SUCCESS);
}

isc_result_t
isc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) {
	REQUIRE(keyboard != NULL);

	if (sleeptime > 0 && keyboard->result != ISC_R_CANCELED)
		(void)Sleep(sleeptime*1000);

	keyboard->fd = -1;

	return (ISC_R_SUCCESS);
}

isc_result_t
isc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) {
	ssize_t cc;
	unsigned char c;

	REQUIRE(keyboard != NULL);
	REQUIRE(cp != NULL);

	cc = read(keyboard->fd, &c, 1);
	if (cc < 0) {
		keyboard->result = ISC_R_IOERROR;
		return (keyboard->result);
	}

	*cp = c;

	return (ISC_R_SUCCESS);
}

isc_boolean_t
isc_keyboard_canceled(isc_keyboard_t *keyboard) {
	return (ISC_TF(keyboard->result == ISC_R_CANCELED));
}