43 lines
878 B
C
43 lines
878 B
C
/*
|
|
* (c) 2005 Nico Schottelius (nico-linux at schottelius.org)
|
|
* cinit.c
|
|
* part of cLinux/cinit
|
|
*/
|
|
|
|
/* this code is stolen from gpm */
|
|
|
|
/* what's the english name for potenz ? */
|
|
int x_high_y(int base, int pot_y)
|
|
{
|
|
int val = 1;
|
|
|
|
if(pot_y == 0) val = 1;
|
|
else if(pot_y < 0) val = 0; /* ugly hack ;) */
|
|
else while(pot_y > 0) {
|
|
val = val * base;
|
|
pot_y--;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/* return characters needed to display int */
|
|
int cnt_digits(int number)
|
|
{
|
|
/* 0-9 = 1 10^0 <-> (10^1)-1
|
|
* 10 - 99 = 2 10^1 <-> (10^2)-1
|
|
* 100 - 999 = 3 10^2 <-> (10^3)-1
|
|
* 1000 - 9999 = 4 ... */
|
|
|
|
int ret = 0, num = 0;
|
|
|
|
/* non negative, please */
|
|
if(number < 0) number *= -1;
|
|
else if(number == 0) ret = 1;
|
|
else while(number > num) {
|
|
ret++;
|
|
num = (x_high_y(10,ret) - 1);
|
|
}
|
|
|
|
return(ret);
|
|
}
|