// Copyright (c) Facebook, Inc. and its affiliates
// SPDX-License-Identifier: MIT OR Apache-2.0

package com.novi.serde;

public final class Slice {
    public final int start;
    public final int end;

    public Slice(int start, int end) {
        this.start = start;
        this.end = end;
    }

    // Lexicographic comparison between the (unsigned!) bytes referenced by `slice1` and `slice2`
    // into `content`.
    public static int compare_bytes(byte[] content, Slice slice1, Slice slice2) {
        int start1 = slice1.start;
        int end1 = slice1.end;
        int start2 = slice2.start;
        int end2 = slice2.end;
        for (int i = 0; i < end1 - start1; i++) {
            int byte1 = content[start1 + i] & 0xFF;
            if (start2 + i >= end2) {
                return 1;
            }
            int byte2 = content[start2 + i] & 0xFF;
            if (byte1 > byte2) {
                return 1;
            }
            if (byte1 < byte2) {
                return -1;
            }
        }
        if (end2 - start2 > end1 - start1) {
            return -1;
        }
        return 0;
    }
}