1const std = @import("std");
 2const common = @import("./common.zig");
 3const builtin = @import("builtin");
 4
 5comptime {
 6    if (builtin.object_format != .c) {
 7        @export(&memset, .{ .name = "memset", .linkage = common.linkage, .visibility = common.visibility });
 8        @export(&__memset, .{ .name = "__memset", .linkage = common.linkage, .visibility = common.visibility });
 9    }
10}
11
12pub fn memset(dest: ?[*]u8, c: u8, len: usize) callconv(.c) ?[*]u8 {
13    @setRuntimeSafety(false);
14
15    if (len != 0) {
16        var d = dest.?;
17        var n = len;
18        while (true) {
19            d[0] = c;
20            n -= 1;
21            if (n == 0) break;
22            d += 1;
23        }
24    }
25
26    return dest;
27}
28
29pub fn __memset(dest: ?[*]u8, c: u8, n: usize, dest_n: usize) callconv(.c) ?[*]u8 {
30    if (dest_n < n)
31        @panic("buffer overflow");
32    return memset(dest, c, n);
33}