raw_cio.c

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	@(#)raw_cio.c 
 *
 *	The console I/O (on the side of use)
 *
 *	libg : use at "printf" and "gets" ,etc.
 *	The equivalent function is existent also in monitor.
 */

#include <basic.h>
#include <sys/consio.h>


IMPORT	W	__MyConsPort;
IMPORT	W	__GetMyPort( void );

#define	MyPort	((__MyConsPort <= 0) ? __GetMyPort() : __MyConsPort)

#define TSD_GST_LEN_256	256
#define TSD_PST_RTN_M1	(-1)
#define TSD_PCH_RTN_M1	(-1)
#define TSD_GCH_RTN_M1	(-1)

/*----------------------------------------------------------------------
        Character-string output to the console
----------------------------------------------------------------------*/
W     _PutString(const B *buf)
{
	W	len;

	for ( len = 0; buf[len] != '\0'; ++len ){
		;
	}
	len = console_out(MyPort, (B*)buf, (UW)len);
	return (len <= 0) ? TSD_PST_RTN_M1 : len;
}
/*----------------------------------------------------------------------
	Single-character-string output to the console
----------------------------------------------------------------------*/
W     _PutChar(W c)
{
	UB	cc = (UB)c;

	return	(console_out(MyPort, (B*)&cc, 1) <= 0) ? TSD_PCH_RTN_M1 : 1;
}
/*----------------------------------------------------------------------
        Single-line input from the console
----------------------------------------------------------------------*/
W     _GetString(B *buf)
{
	W	len;

	len = console_in(MyPort, buf, TSD_GST_LEN_256);
	if ((len > 0 )&&( buf[len - 1] == '\n')) {
		buf[--len] = 0;
	}
	return len;
}
/*----------------------------------------------------------------------
        Single-character-string input from the console
----------------------------------------------------------------------*/
W     _GetChar( void )
{
	UB	c;
	return	(console_in(MyPort, (B*)&c, 1) <= 0) ? TSD_GCH_RTN_M1 : c;
}