Function string_token

system/lib/llvm-libc/src/string/string_utils.h:184–213

// terminating character is reached, returns a nullptr.
template <bool SkipDelim = true>
LIBC_INLINE char *string_token(char *__restrict src,
                               const char *__restrict delimiter_string,
                               char **__restrict saveptr) {
  // Return nullptr immediately if both src AND saveptr are nullptr
  if (LIBC_UNLIKELY(src == nullptr && ((src = *saveptr) == nullptr)))
    return nullptr;

  static_assert(CHAR_BIT == 8, "bitset of 256 assumes char is 8 bits");
  cpp::bitset<256> delimiter_set;
  for (; *delimiter_string != '\0'; ++delimiter_string)
    delimiter_set.set(static_cast<size_t>(*delimiter_string));

  if constexpr (SkipDelim)
    for (; *src != '\0' && delimiter_set.test(static_cast<size_t>(*src)); ++src)
      ;
  if (*src == '\0') {
    *saveptr = src;
    return nullptr;
  }
  char *token = src;
  for (; *src != '\0'; ++src) {
    if (delimiter_set.test(static_cast<size_t>(*src))) {
      *src = '\0';
      ++src;
      break;
    }
  }
  *saveptr = src;
  return token;
}

LIBC_INLINE size_t strlcpy(char *__restrict dst, const char *__restrict src,
                           size_t size) {