tm_getline.c

uT Kernel os source code for AT91

/*
 *----------------------------------------------------------------------
 *    micro T-Kernel
 *
 *    Copyright (C) 2006-2007 by Ken Sakamura. All rights reserved.
 *    micro T-Kernel is distributed under the micro T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2007/03/26.
 *
 *----------------------------------------------------------------------
 */

#include <typedef.h>
#include <stddef.h>
#include <tk/syslib.h>

IMPORT void sio_send_frame( const UB* buf, INT size );
IMPORT void sio_recv_frame( UB* buf, INT size );

/*
 * special key is not supported
 */
EXPORT INT tm_getline( UB *buff )
{
	UB* p = buff;
	int len = 0;
	static const char LF = 0x0a;
	INT imask;

	DI(imask);

	for (;;) {
		sio_recv_frame(p, 1);
		sio_send_frame(p, 1); /* echo back */
		if (*p == 0x0d) {
			sio_send_frame((const VP)&LF, 1);
			*p = 0x00;
			return len;
		} else if (*p == 0x03) {
			*p = 0x00;
			return -1;
		}
		p++;
		len++;
	}

	EI(imask);

	return len;
}