#include "Common.h"

///////////////////// convert strings

std::string ConvertWideToANSI(const std::wstring& wstr)
{
    int count = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.length(), NULL, 0, NULL, NULL);
    std::string str(count, 0);
    WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), -1, &str[0], count, NULL, NULL);
    return str;
}

std::wstring ConvertAnsiToWide(const std::string& str)
{
    int count = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.length(), NULL, 0);
    std::wstring wstr(count, 0);
    MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.length(), &wstr[0], count);
    return wstr;
}

std::string ConvertWideToUtf8(const std::wstring& wstr)
{
    int count = WideCharToMultiByte(CP_UTF8, 0, wstr.c_str(), wstr.length(), NULL, 0, NULL, NULL);
    std::string str(count, 0);
    WideCharToMultiByte(CP_UTF8, 0, wstr.c_str(), -1, &str[0], count, NULL, NULL);
    return str;
}

std::wstring ConvertUtf8ToWide(const std::string& str)
{
    int count = MultiByteToWideChar(CP_UTF8, 0, str.c_str(), str.length(), NULL, 0);
    std::wstring wstr(count, 0);
    MultiByteToWideChar(CP_UTF8, 0, str.c_str(), str.length(), &wstr[0], count);
    return wstr;
}

//////////////////// Misc

std::string GetWinErrorMessage(int id)
{
    std::string ret(2048, 0);

    FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL, id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPSTR)ret.c_str(), ret.capacity(), NULL);

    return ret;
}

bool FileExists(LPCWSTR szPath)
{
    DWORD dwAttrib = GetFileAttributes(szPath);

    return (dwAttrib != INVALID_FILE_ATTRIBUTES &&
        !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
}