1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
172 lines
2.6 KiB
C
172 lines
2.6 KiB
C
/*
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* Copyright (C) Paul Mackerras 1997.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stdarg.h>
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#include "of1275.h"
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extern int strlen(const char *s);
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extern void boot(int a1, int a2, void *prom);
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phandle stdin;
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phandle stdout;
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phandle stderr;
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void printk(char *fmt, ...);
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void
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start(int a1, int a2, void *promptr)
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{
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ofinit(promptr);
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if (ofstdio(&stdin, &stdout, &stderr))
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exit();
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boot(a1, a2, promptr);
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for (;;)
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exit();
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}
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int writestring(void *f, char *ptr, int nb)
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{
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int w = 0, i;
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char *ret = "\r";
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for (i = 0; i < nb; ++i) {
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if (ptr[i] == '\n') {
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if (i > w) {
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write(f, ptr + w, i - w);
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w = i;
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}
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write(f, ret, 1);
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}
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}
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if (w < nb)
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write(f, ptr + w, nb - w);
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return nb;
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}
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int
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putc(int c, void *f)
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{
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char ch = c;
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return writestring(f, &ch, 1) == 1? c: -1;
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}
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int
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putchar(int c)
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{
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return putc(c, stdout);
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}
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int
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fputs(char *str, void *f)
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{
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int n = strlen(str);
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return writestring(f, str, n) == n? 0: -1;
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}
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int
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readchar(void)
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{
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char ch;
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for (;;) {
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switch (read(stdin, &ch, 1)) {
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case 1:
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return ch;
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case -1:
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printk("read(stdin) returned -1\n");
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return -1;
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}
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}
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}
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static char line[256];
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static char *lineptr;
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static int lineleft;
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int
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getchar(void)
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{
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int c;
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if (lineleft == 0) {
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lineptr = line;
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for (;;) {
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c = readchar();
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if (c == -1 || c == 4)
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break;
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if (c == '\r' || c == '\n') {
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*lineptr++ = '\n';
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putchar('\n');
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break;
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}
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switch (c) {
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case 0177:
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case '\b':
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if (lineptr > line) {
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putchar('\b');
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putchar(' ');
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putchar('\b');
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--lineptr;
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}
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break;
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case 'U' & 0x1F:
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while (lineptr > line) {
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putchar('\b');
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putchar(' ');
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putchar('\b');
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--lineptr;
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}
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break;
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default:
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if (lineptr >= &line[sizeof(line) - 1])
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putchar('\a');
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else {
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putchar(c);
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*lineptr++ = c;
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}
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}
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}
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lineleft = lineptr - line;
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lineptr = line;
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}
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if (lineleft == 0)
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return -1;
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--lineleft;
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return *lineptr++;
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}
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extern int vsprintf(char *buf, const char *fmt, va_list args);
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static char sprint_buf[1024];
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void
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printk(char *fmt, ...)
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{
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va_list args;
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int n;
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va_start(args, fmt);
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n = vsprintf(sprint_buf, fmt, args);
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va_end(args);
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writestring(stdout, sprint_buf, n);
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}
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int
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printf(char *fmt, ...)
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{
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va_list args;
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int n;
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va_start(args, fmt);
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n = vsprintf(sprint_buf, fmt, args);
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va_end(args);
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writestring(stdout, sprint_buf, n);
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return n;
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}
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