/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: GBK.hpp
    Date: 2021-11-1
    Author: Reece
***/
#pragma once

namespace Aurora::Locale::Encoding::GBK
{
    static auline int GetLenGBKCodePoint(const AuUInt8 *in, AuUInt32 len)
    {
        if (len == 0)
        {
            return 0;
        }

        if (in[0] >= 0x80)
        {
            if (len < 2)
            {
                return 0;
            }

            return 2;
        }

        return 1;
    }
    
    static inline int CountGbk(const void *base, AuUInt32 length, bool bytes = false)
    {
        AuUInt32 i {}, cps {};
        
        for (; i < length; )
        {
            auto next = GetLenGBKCodePoint((const AuUInt8*)base + i, length - i);
            if (next == 0)
            {
                return bytes ? i : cps;
            }
            
            i += next;
            cps++;
        }
        
        return bytes ? i : cps;
    }
}