You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.7 KiB
60 lines
1.7 KiB
#include <windows.h>
|
|
|
|
/* helper routine that does the main job. */
|
|
|
|
static void xtoa (
|
|
unsigned long val,
|
|
char *buf,
|
|
unsigned radix,
|
|
int is_neg
|
|
)
|
|
{
|
|
char *p; /* pointer to traverse string */
|
|
char *firstdig; /* pointer to first digit */
|
|
char temp; /* temp char */
|
|
unsigned digval; /* value of digit */
|
|
|
|
p = buf;
|
|
|
|
if (is_neg) {
|
|
/* negative, so output '-' and negate */
|
|
*p++ = '-';
|
|
val = (unsigned long)(-(long)val);
|
|
}
|
|
|
|
firstdig = p; /* save pointer to first digit */
|
|
|
|
do {
|
|
digval = (unsigned) (val % radix);
|
|
val /= radix; /* get next digit */
|
|
|
|
/* convert to ascii and store */
|
|
if (digval > 9)
|
|
*p++ = (char) (digval - 10 + 'a'); /* a letter */
|
|
else
|
|
*p++ = (char) (digval + '0'); /* a digit */
|
|
} while (val > 0);
|
|
|
|
/* We now have the digit of the number in the buffer, but in reverse
|
|
order. Thus we reverse them now. */
|
|
|
|
*p-- = '\0'; /* terminate string; p points to last digit */
|
|
|
|
do {
|
|
temp = *p;
|
|
*p = *firstdig;
|
|
*firstdig = temp; /* swap *p and *firstdig */
|
|
--p;
|
|
++firstdig; /* advance to next two digits */
|
|
} while (firstdig < p); /* repeat until halfway */
|
|
}
|
|
|
|
/* Actual functions just call conversion helper with neg flag set correctly,
|
|
and return pointer to buffer. */
|
|
|
|
PSTR ULtoA( unsigned long val, char *buf, int radix )
|
|
{
|
|
xtoa(val, buf, radix, 0);
|
|
return buf;
|
|
}
|
|
|