forked from AbleOS/ableos
51 lines
679 B
Plaintext
51 lines
679 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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} |