mirror of https://gitee.com/openkylin/qemu.git
140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "libc.h"
|
|
|
|
static void print_char(char c)
|
|
{
|
|
outb(0xe9, c);
|
|
}
|
|
|
|
static void print_str(char *s)
|
|
{
|
|
while (*s) {
|
|
print_char(*s++);
|
|
}
|
|
}
|
|
|
|
static void print_num(uint64_t value, int base)
|
|
{
|
|
char digits[] = "0123456789abcdef";
|
|
char buf[32] = { 0 };
|
|
int i = sizeof(buf) - 2;
|
|
|
|
do {
|
|
buf[i--] = digits[value % base];
|
|
value /= base;
|
|
} while (value);
|
|
|
|
print_str(&buf[i + 1]);
|
|
}
|
|
|
|
void printf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
uint64_t val;
|
|
char *str;
|
|
int base;
|
|
int has_long;
|
|
int alt_form;
|
|
|
|
va_start(ap, fmt);
|
|
|
|
for (; *fmt; fmt++) {
|
|
if (*fmt != '%') {
|
|
print_char(*fmt);
|
|
continue;
|
|
}
|
|
fmt++;
|
|
|
|
if (*fmt == '#') {
|
|
fmt++;
|
|
alt_form = 1;
|
|
} else {
|
|
alt_form = 0;
|
|
}
|
|
|
|
if (*fmt == 'l') {
|
|
fmt++;
|
|
if (*fmt == 'l') {
|
|
fmt++;
|
|
has_long = 2;
|
|
} else {
|
|
has_long = 1;
|
|
}
|
|
} else {
|
|
has_long = 0;
|
|
}
|
|
|
|
switch (*fmt) {
|
|
case 'x':
|
|
case 'p':
|
|
base = 16;
|
|
goto convert_number;
|
|
case 'd':
|
|
case 'i':
|
|
case 'u':
|
|
base = 10;
|
|
goto convert_number;
|
|
case 'o':
|
|
base = 8;
|
|
goto convert_number;
|
|
|
|
convert_number:
|
|
switch (has_long) {
|
|
case 0:
|
|
val = va_arg(ap, unsigned int);
|
|
break;
|
|
case 1:
|
|
val = va_arg(ap, unsigned long);
|
|
break;
|
|
case 2:
|
|
val = va_arg(ap, unsigned long long);
|
|
break;
|
|
}
|
|
|
|
if (alt_form && base == 16) {
|
|
print_str("0x");
|
|
}
|
|
|
|
print_num(val, base);
|
|
break;
|
|
|
|
case 's':
|
|
str = va_arg(ap, char*);
|
|
print_str(str);
|
|
break;
|
|
case '%':
|
|
print_char(*fmt);
|
|
break;
|
|
default:
|
|
print_char('%');
|
|
print_char(*fmt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
va_end(ap);
|
|
}
|
|
|
|
|