mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
84 lines
3.3 KiB
C
84 lines
3.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/nexgen32e/uart.internal.h"
|
|
#include "libc/runtime/pc.internal.h"
|
|
#include "libc/runtime/runtime.h"
|
|
|
|
#ifdef __x86_64__
|
|
|
|
#define PUTC(C) \
|
|
do { \
|
|
while (!(inb(0x3F8 + UART_LSR) & UART_TTYTXR)) { \
|
|
__builtin_ia32_pause(); \
|
|
} \
|
|
outb(0x3F8, C); \
|
|
} while (0)
|
|
|
|
/**
|
|
* Prints string to serial port.
|
|
*
|
|
* This only supports %d and %s. It'll will work even if .rodata hasn't
|
|
* been loaded into memory yet.
|
|
*/
|
|
textreal void(MetalPrintf)(const char *fmt, ...) {
|
|
int i;
|
|
char c;
|
|
unsigned u;
|
|
va_list va;
|
|
const char *s;
|
|
unsigned long d;
|
|
va_start(va, fmt);
|
|
for (;;) {
|
|
switch ((c = *fmt++)) {
|
|
case '\0':
|
|
va_end(va);
|
|
return;
|
|
case '%':
|
|
switch ((c = *fmt++)) {
|
|
case 's':
|
|
for (s = va_arg(va, const char *); s && *s; ++s) {
|
|
PUTC(*s);
|
|
}
|
|
break;
|
|
case 'd':
|
|
d = va_arg(va, unsigned long);
|
|
for (i = 16; i--;) {
|
|
u = (d >> (i * 4)) & 0xf;
|
|
if (u < 10) {
|
|
c = '0' + u;
|
|
} else {
|
|
u -= 10;
|
|
c = 'a' + u;
|
|
}
|
|
PUTC(c);
|
|
}
|
|
break;
|
|
default:
|
|
PUTC(c);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
PUTC(c);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* __x86_64__ */
|