#include "prx/libc/include/general/VabiMacros.hpp"
#include <cerrno>
#include <cstddef>
#include <cstdint>
#include <cstring>

extern "C" {

int __mb_cur_max_nid_postfix = 1;

int APS5_VABI ___mb_cur_max_nid_postfix() {
    return 1;
}

int APS5_VABI mbsinit_nid_postfix(const void*) {
    return 1;
}

std::size_t APS5_VABI mbrtowc_nid_postfix(std::uint16_t* destination, const char* source, std::size_t count, void*) {
    if (!source) return 0;
    if (!count) return static_cast<std::size_t>(-2);
    const auto value = static_cast<unsigned char>(*source);
    if (destination) *destination = value;
    return value != 0;
}

std::size_t APS5_VABI mbrlen_nid_postfix(const char* source, std::size_t count, void* state) {
    return mbrtowc_nid_postfix(nullptr, source, count, state);
}

int APS5_VABI mbtowc_nid_postfix(std::uint16_t* destination, const char* source, std::size_t count) {
    const auto result = mbrtowc_nid_postfix(destination, source, count, nullptr);
    if (result == static_cast<std::size_t>(-2)) {
        errno = 86;
        return -1;
    }
    return static_cast<int>(result);
}

std::size_t APS5_VABI wcrtomb_nid_postfix(char* destination, std::uint16_t value, void*) {
    if (!destination) return 1;
    if (value > 255) {
        errno = 86;
        return static_cast<std::size_t>(-1);
    }
    *destination = static_cast<char>(value);
    return 1;
}

std::size_t APS5_VABI mbsrtowcs_nid_postfix(std::uint16_t* destination, const char** source, std::size_t capacity, void*) {
    if (!destination) return std::strlen(*source);
    std::size_t converted = 0;
    while (converted < capacity) {
        const auto value = static_cast<unsigned char>((*source)[converted]);
        destination[converted] = value;
        if (value == 0) {
            *source = nullptr;
            return converted;
        }
        ++converted;
    }
    *source += converted;
    return converted;
}

}