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