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#include "u.h"
#include "lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
static Queue* consiq;
static Queue* consoq;
void
bothputs(char *s, int n)
{
uartputs(s, n);
screenputs(s, n);
}
static void (*consputs)(char*, int) = bothputs; /* or screenputs */
void
consinit(void)
{
char *p;
int baud, port;
static int cgadone;
p = getconf("console");
if(0)
if(p == 0 || strcmp(p, "lcd") == 0 || strcmp(p, "screen") == 0){
consiq = qopen(4*1024, 0, 0, 0);
consoq = qopen(8*1024, 0, 0, 0);
consputs = screenputs;
return;
}
if(p!=0 && strstr(p, "lcd") == 0)
consputs = bothputs;
else
consputs = uartputs;
//consputs = screenputs;
port = 0;
if(p)
port = strtoul(p, 0, 0);
baud = 0;
if(p = getconf("baud"))
baud = strtoul(p, 0, 0);
if(baud == 0)
baud = 9600;
uartspecial(port, baud, &consiq, &consoq, kbdchar);
}
void
kbdchar(Queue *q, int c)
{
c &= 0x7F;
if(c == 0x10)
panic("^p");
qbputc(q, c);
}
static int
getline(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 = qbgetc(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)(&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;
}
int
getstr(char *prompt, char *buf, int size, char *def)
{
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, isdefault);
switch(len){
case -1:
/* ^U typed */
continue;
case -2:
/* timeout, use default */
(*consputs)("\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;
}
int
sprint(char *s, char *fmt, ...)
{
return donprint(s, s+PRINTSIZE, fmt, (&fmt+1)) - s;
}
int
print(char *fmt, ...)
{
char buf[PRINTSIZE];
int n;
if(consputs == 0)
return 0;
n = donprint(buf, buf+sizeof(buf), fmt, (&fmt+1)) - buf;
(*consputs)(buf, n);
return n;
}
void
panic(char *fmt, ...)
{
char buf[PRINTSIZE];
int n;
if(consputs){
(*consputs)("panic: ", 7);
n = donprint(buf, buf+sizeof(buf), fmt, (&fmt+1)) - buf;
(*consputs)(buf, n);
(*consputs)("\n", 1);
}
spllo();
for(;;)
idle();
}
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