173 lines
2.6 KiB
C
173 lines
2.6 KiB
C
|
/*
|
||
|
* Copyright (C) Paul Mackerras 1997.
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or
|
||
|
* modify it under the terms of the GNU General Public License
|
||
|
* as published by the Free Software Foundation; either version
|
||
|
* 2 of the License, or (at your option) any later version.
|
||
|
*/
|
||
|
#include <stdarg.h>
|
||
|
#include "of1275.h"
|
||
|
|
||
|
extern int strlen(const char *s);
|
||
|
extern void boot(int a1, int a2, void *prom);
|
||
|
|
||
|
phandle stdin;
|
||
|
phandle stdout;
|
||
|
phandle stderr;
|
||
|
|
||
|
void printk(char *fmt, ...);
|
||
|
|
||
|
void
|
||
|
start(int a1, int a2, void *promptr)
|
||
|
{
|
||
|
ofinit(promptr);
|
||
|
if (ofstdio(&stdin, &stdout, &stderr))
|
||
|
exit();
|
||
|
|
||
|
boot(a1, a2, promptr);
|
||
|
for (;;)
|
||
|
exit();
|
||
|
}
|
||
|
|
||
|
int writestring(void *f, char *ptr, int nb)
|
||
|
{
|
||
|
int w = 0, i;
|
||
|
char *ret = "\r";
|
||
|
|
||
|
for (i = 0; i < nb; ++i) {
|
||
|
if (ptr[i] == '\n') {
|
||
|
if (i > w) {
|
||
|
write(f, ptr + w, i - w);
|
||
|
w = i;
|
||
|
}
|
||
|
write(f, ret, 1);
|
||
|
}
|
||
|
}
|
||
|
if (w < nb)
|
||
|
write(f, ptr + w, nb - w);
|
||
|
return nb;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
putc(int c, void *f)
|
||
|
{
|
||
|
char ch = c;
|
||
|
|
||
|
return writestring(f, &ch, 1) == 1? c: -1;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
putchar(int c)
|
||
|
{
|
||
|
return putc(c, stdout);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
fputs(char *str, void *f)
|
||
|
{
|
||
|
int n = strlen(str);
|
||
|
|
||
|
return writestring(f, str, n) == n? 0: -1;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
readchar(void)
|
||
|
{
|
||
|
char ch;
|
||
|
|
||
|
for (;;) {
|
||
|
switch (read(stdin, &ch, 1)) {
|
||
|
case 1:
|
||
|
return ch;
|
||
|
case -1:
|
||
|
printk("read(stdin) returned -1\n");
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static char line[256];
|
||
|
static char *lineptr;
|
||
|
static int lineleft;
|
||
|
|
||
|
int
|
||
|
getchar(void)
|
||
|
{
|
||
|
int c;
|
||
|
|
||
|
if (lineleft == 0) {
|
||
|
lineptr = line;
|
||
|
for (;;) {
|
||
|
c = readchar();
|
||
|
if (c == -1 || c == 4)
|
||
|
break;
|
||
|
if (c == '\r' || c == '\n') {
|
||
|
*lineptr++ = '\n';
|
||
|
putchar('\n');
|
||
|
break;
|
||
|
}
|
||
|
switch (c) {
|
||
|
case 0177:
|
||
|
case '\b':
|
||
|
if (lineptr > line) {
|
||
|
putchar('\b');
|
||
|
putchar(' ');
|
||
|
putchar('\b');
|
||
|
--lineptr;
|
||
|
}
|
||
|
break;
|
||
|
case 'U' & 0x1F:
|
||
|
while (lineptr > line) {
|
||
|
putchar('\b');
|
||
|
putchar(' ');
|
||
|
putchar('\b');
|
||
|
--lineptr;
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
if (lineptr >= &line[sizeof(line) - 1])
|
||
|
putchar('\a');
|
||
|
else {
|
||
|
putchar(c);
|
||
|
*lineptr++ = c;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
lineleft = lineptr - line;
|
||
|
lineptr = line;
|
||
|
}
|
||
|
if (lineleft == 0)
|
||
|
return -1;
|
||
|
--lineleft;
|
||
|
return *lineptr++;
|
||
|
}
|
||
|
|
||
|
extern int vsprintf(char *buf, const char *fmt, va_list args);
|
||
|
static char sprint_buf[1024];
|
||
|
|
||
|
void
|
||
|
printk(char *fmt, ...)
|
||
|
{
|
||
|
va_list args;
|
||
|
int n;
|
||
|
|
||
|
va_start(args, fmt);
|
||
|
n = vsprintf(sprint_buf, fmt, args);
|
||
|
va_end(args);
|
||
|
writestring(stdout, sprint_buf, n);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
printf(char *fmt, ...)
|
||
|
{
|
||
|
va_list args;
|
||
|
int n;
|
||
|
|
||
|
va_start(args, fmt);
|
||
|
n = vsprintf(sprint_buf, fmt, args);
|
||
|
va_end(args);
|
||
|
writestring(stdout, sprint_buf, n);
|
||
|
return n;
|
||
|
}
|