47 lines
1,018 B
C
47 lines
1,018 B
C
|
|
/* Long to ASCII conversion routine - used by print, and those programs
|
|
* which want to do low level formatted output without hauling in a great
|
|
* deal of extraneous code. This will convert a long value to an ascii
|
|
* string in any radix from 2 - 16.
|
|
* RETURNS - the number of characters in the converted buffer.
|
|
*/
|
|
|
|
static char digits[] = {
|
|
'0', '1', '2', '3', '4',
|
|
'5', '6', '7', '8', '9',
|
|
'a', 'b', 'c', 'd', 'e', 'f'
|
|
};
|
|
|
|
#define BITS_IN_LONG (8*sizeof(long))
|
|
|
|
int zltoa(long aval, register char *buf, int base)
|
|
{
|
|
/*
|
|
* if unsigned long wont work on your host, you will probably have
|
|
* to use signed long and accept this as not working for negative
|
|
* numbers.
|
|
*/
|
|
register unsigned long val;
|
|
register char *p;
|
|
char tbuf[BITS_IN_LONG];
|
|
int size = 0;
|
|
|
|
p = tbuf;
|
|
*p++ = '\0';
|
|
if (aval < 0 && base == 10)
|
|
{
|
|
*buf++ = '-';
|
|
val = -aval;
|
|
size++;
|
|
}
|
|
else
|
|
val = aval;
|
|
do {
|
|
*p++ = digits[val % base];
|
|
}
|
|
while (val /= base);
|
|
while ((*buf++ = *--p) != 0)
|
|
++size;
|
|
return(size);
|
|
}
|