/*
 * libfud
 * Copyright 2024 Dominick Allen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef FUD_C_STRING_HPP
#define FUD_C_STRING_HPP

#include <climits>
#include <cstddef>
#include <sys/types.h>


namespace fud {

constexpr ssize_t cStringLength(const char* str, size_t maxLength)
{
    if (str == nullptr || maxLength > (SSIZE_MAX - 1)) {
        return -1;
    }

    ssize_t size = 0;

    while (str[size] != 0 && static_cast<size_t>(size) < maxLength) {
        size++;
    }

    if (str[size] != 0 && static_cast<size_t>(size) == maxLength) {
        return static_cast<ssize_t>(maxLength) + 1;
    }

    return size;
}

constexpr ssize_t cStringLength(const char* str)
{
    constexpr auto maxLength = SSIZE_MAX - 1;
    return cStringLength(str, maxLength);
}

} // namespace fud

#endif