1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
#include <stdio.h>
#include <stdarg.h>
BYTE printf(char *fmt, ...)
{
va_list ap;
BYTE nb = 0;
va_start(ap, fmt);
for(; *fmt; fmt++)
if(*fmt == '%') {
switch(*++fmt) {
case 'c':
/* char */
putchar(va_arg(ap, char));
break;
case 'd':
/* decimal int */
printn(va_arg(ap, BYTE), 10, SIGNED);
break;
case 'u':
/* unsigned int */
printn(va_arg(ap, BYTE), 10, UNSIGNED);
break;
case 'o':
/* octal int */
printn(va_arg(ap, BYTE), 8, UNSIGNED);
break;
case 'x':
/* hexadecimal int */
printn(va_arg(ap, BYTE), 16, UNSIGNED);
break;
case 's':
/* string */
print(va_arg(ap, char *));
break;
case 'l':
/* long */
switch(*++fmt) {
case 'd':
/* decimal long */
println(va_arg(ap, WORD), 10, SIGNED);
break;
case 'u':
/* unsigned long */
println(va_arg(ap, WORD), 10, UNSIGNED);
break;
case 'o':
/* octal long */
println(va_arg(ap, WORD), 8, UNSIGNED);
break;
case 'x':
/* hexadecimal long */
println(va_arg(ap, WORD), 16, UNSIGNED);
break;
}
break;
case '%':
/* % */
putchar(*fmt);
break;
default:
return -1;
}
nb++;
} else
putchar(*fmt);
va_end(ap);
return nb;
}
|
