/*---------------------------------------------------------*\
| StringUtils.cpp                                           |
|                                                           |
|   String utility functions                                |
|                                                           |
|   This file is part of the OpenRGB project                |
|   SPDX-License-Identifier: GPL-2.0-only                   |
\*---------------------------------------------------------*/

#include <codecvt>
#include <locale>
#include <string>
#include "StringUtils.h"

const char *StringUtils::wchar_to_char(const wchar_t *pwchar)
{
    if (pwchar == nullptr) {
        return "";
    }
    // get the number of characters in the string.
    int currentCharIndex = 0;
    char currentChar = (char) pwchar[currentCharIndex];

    while (currentChar != '\0') {
        currentCharIndex++;
        currentChar = (char) pwchar[currentCharIndex];
    }

    const int charCount = currentCharIndex + 1;

    // allocate a new block of memory size char (1 byte) instead of wide char (2 bytes)
    char *filePathC = (char *) malloc(sizeof(char) * charCount);

    for (int i = 0; i < charCount; i++) {
        // convert to char (1 byte)
        char character = (char) pwchar[i];

        *filePathC = character;

        filePathC += sizeof(char);
    }
    filePathC += '\0';

    filePathC -= (sizeof(char) * charCount);

    return filePathC;
}

std::string StringUtils::wstring_to_string(const std::wstring wstring)
{
    std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> converter;

    return (converter.to_bytes(wstring));
}

std::string StringUtils::u16string_to_string(const std::u16string wstring)
{
    std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> converter;

    return (converter.to_bytes(wstring));
}

const std::string StringUtils::remove_null_terminating_chars(std::string input)
{
    while (!input.empty() && input.back() == 0) {
        input.pop_back();
    }

    return input;
}