forked from AbleOS/ableos
52 lines
867 B
Plaintext
52 lines
867 B
Plaintext
length := fn(ptr: ^u8): int {
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len := 0;
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loop if *ptr == 0 break else {
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len += 1;
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ptr += 1;
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}
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return len;
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}
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display_int := fn(num: int, p: ^u8): ^u8 {
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i := 0;
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if num == 0 {
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set(p, 48);
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return p;
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}
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loop {
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if num == 0 break;
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set(p + i, num % 10 + 48);
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num /= 10;
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i += 1;
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}
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reverse(p);
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//null terminate
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set(p + i, 0);
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return p;
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}
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reverse := fn(s: ^u8): void {
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//reverse a string, don't remove digits
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len := 0;
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loop {
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if *(s + len) == 0 break;
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len += 1;
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}
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i := 0;
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j := len - 1;
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loop {
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if i >= j break;
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temp := *(s + i);
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*(s + i) = *(s + j);
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*(s + j) = temp;
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i += 1;
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j -= 1;
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}
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return;
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}
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set := fn(change: ^u8, new: int): void {
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*(change) = new;
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return;
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}
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