1const std = @import("std");
 2const common = @import("./common.zig");
 3
 4comptime {
 5    @export(&bcmp, .{ .name = "bcmp", .linkage = common.linkage, .visibility = common.visibility });
 6}
 7
 8pub fn bcmp(vl: [*]allowzero const u8, vr: [*]allowzero const u8, n: usize) callconv(.c) c_int {
 9    @setRuntimeSafety(false);
10
11    var index: usize = 0;
12    while (index != n) : (index += 1) {
13        if (vl[index] != vr[index]) {
14            return 1;
15        }
16    }
17
18    return 0;
19}
20
21test "bcmp" {
22    const base_arr = &[_]u8{ 1, 1, 1 };
23    const arr1 = &[_]u8{ 1, 1, 1 };
24    const arr2 = &[_]u8{ 1, 0, 1 };
25    const arr3 = &[_]u8{ 1, 2, 1 };
26
27    try std.testing.expect(bcmp(base_arr[0..], arr1[0..], base_arr.len) == 0);
28    try std.testing.expect(bcmp(base_arr[0..], arr2[0..], base_arr.len) != 0);
29    try std.testing.expect(bcmp(base_arr[0..], arr3[0..], base_arr.len) != 0);
30}