blob: 319f6fd4cf4ee99a267108674fd1153b9eb9b6fb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
#include <algorithm>
#include <bit>
#include <cstddef>
#include <iterator>
#include <span>
namespace kstd::libc
{
extern "C"
{
auto strlen(char const * string) -> std::size_t
{
return std::distance(string, std::ranges::find(string, nullptr, '\0'));
}
auto memcmp(void const * lhs, void const * rhs, std::size_t size) -> std::size_t
{
auto left_span = std::span{static_cast<std::byte const *>(lhs), size};
auto right_span = std::span{static_cast<std::byte const *>(rhs), size};
auto mismatched = std::ranges::mismatch(left_span, right_span);
if (mismatched.in1 == left_span.end())
{
return 0;
}
return std::bit_cast<char>(*mismatched.in1) - std::bit_cast<char>(*mismatched.in2);
}
}
} // namespace kstd::libc
|
