fn strspn(dst: [*:0]const c_char, values: [*:0]const c_char) callconv(.c) usize
fn strspn(dst: [*:0]const c_char, values: [*:0]const c_char) callconv(.c) usize { const dst_slice = std.mem.span(@as([*:0]const u8, @ptrCast(dst))); return std.mem.findNone(u8, dst_slice, std.mem.span(@as([*:0]const u8, @ptrCast(values)))) orelse dst_slice.len; }