#include "u.h"#include "lib.h"#include "mem.h"#include "dat.h"#include "fns.h"#include "io.h" static IOQ consiq;static IOQ consoq; static void (*consputs)(IOQ*, char*, int) = cgaputs; voidconsinit(void){	char *p;	int baud, port; 	qinit(&consiq); 	if((p = getconf("console")) == 0 || strcmp(p, "cga") == 0){		consputs = cgaputs;		cgainit();		kbdinit();		return;	} 	qinit(&consoq);	consputs = uartputs; 	port = strtoul(p, 0, 0);	baud = 0;	if(p = getconf("baud"))		baud = strtoul(p, 0, 0);	if(baud == 0)		baud = 9600;	uartspecial(port, kbdchar, conschar, baud);} voidkbdchar(int c){	c &= 0x7F;	if(c == 0x10)		panic("^p");	consiq.putc(&consiq, c);} intconschar(void){	return consoq.getc(&consoq);} static intgetline(char *buf, int size, int dotimeout){	int c, i=0;	ulong start;	char echo; 	for (;;) {		start = m->ticks;		do{			if(dotimeout && ((m->ticks - start) > 5*HZ))				return -2;			c = consiq.getc(&consiq);		}while(c == -1);		if(c == '\r')			c = '\n'; 		/* turn carriage return into newline */		if(c == '\177')			c = '\010';		/* turn delete into backspace */		if(c == '\025')			echo = '\n';		/* echo ^U as a newline */		else			echo = c;		(*consputs)(&consoq, &echo, 1); 		if(c == '\010'){			if(i > 0)				i--; /* bs deletes last character */			continue;		}		/* a newline ends a line */		if (c == '\n')			break;		/* ^U wipes out the line */		if (c =='\025')			return -1;		if(i == size)			return size;		buf[i++] = c;	}	buf[i] = 0;	return i;} intgetstr(char *prompt, char *buf, int size, char *def, int timeout){	int len, isdefault; 	buf[0] = 0;	isdefault = (def && *def);	for (;;) {		if(isdefault)			print("%s[default==%s]: ", prompt, def);		else			print("%s: ", prompt);		len = getline(buf, size, timeout);		switch(len){		case -1:			/* ^U typed */			continue;		case -2:			/* timeout, use default */			(*consputs)(&consoq, "\n", 1);			len = 0;			break;		default:			break;		}		if(len >= size){			print("line too long\n");			continue;		}		break;	}	if(len == 0 && isdefault)		strcpy(buf, def);	return 0;} intsprint(char *s, char *fmt, ...){	return donprint(s, s+PRINTSIZE, fmt, (&fmt+1)) - s;} intprint(char *fmt, ...){	char buf[PRINTSIZE];	int n; 	if(consputs == 0)		return 0;	n = donprint(buf, buf+sizeof(buf), fmt, (&fmt+1)) - buf;	(*consputs)(&consoq, buf, n);	return n;} voidpanic(char *fmt, ...){	char buf[PRINTSIZE];	int n; 	if(consputs){		(*consputs)(&consoq, "panic: ", 7);		n = donprint(buf, buf+sizeof(buf), fmt, (&fmt+1)) - buf;		(*consputs)(&consoq, buf, n);		(*consputs)(&consoq, "\n", 1);	}	spllo();	i8042reset();	for(;;)		idle();}