/********************************************************************
    created:    2016-5-25
    desc:       10进制与x进制的相互转换
    author:        陈刚
    purpose:    如有问题与我联系 QQ: 17448470
*********************************************************************/

#pragma once
#include "stdafx.h"
#include "string_util.h"


//10进制和x进制的换算
class CBaseDigitalConv
{
public:
    CBaseDigitalConv(){}
    virtual ~CBaseDigitalConv(){}
    
public:
    //10进制转化成的x进制长度，不足nMinLen长度的话高位补0，否则不改变什么
    string to_x(const string& src10, int nMinLen)
    {
        string dst;
        uint64_t src = stringToint64(src10);
        while(src != 0){
            int nMod = src % m_nDigital;
            char szTmp[2];
            szTmp[0] = m_charSet[nMod];
            szTmp[1] = 0;
            dst.append(szTmp);
            
            src = src / m_nDigital;
        }
        
        reverse(dst.begin(), dst.end());
        string str = convMinLen(dst, nMinLen);
        return str;
    }

    //x进制转为10进制
    string to_10(const string& srcx, int nMinLen)
    {
        uint64_t dst = 0L;
        for(int i=0; i<srcx.length(); i++)
        {
            char c = srcx[i];
            for(int j=0; j<strlen(m_charSet); j++)
            {
                if(c == m_charSet[j])
                {
                    dst = (dst * m_nDigital) + j;
                    break;
                }
            }
        }
        
        string str = convMinLen(int64Tostring(dst), nMinLen);
        return str;
    }
    
protected:
    static string convMinLen(const string& src, int nMinLen)
    {
        int nAddLen = nMinLen - src.length();
        string strTmp;
        for(int i=0; i<nAddLen; i++)
        {
            strTmp += "0";
        }
        return strTmp + src;
    }

    //初始化，设置字符集
    void init(const char* charSet)
    {
        strcpy(m_charSet, charSet);
        m_nDigital = strlen(m_charSet);
    }

private:
    char    m_charSet[128];
    int        m_nDigital;
};



//10进制和62进制的换算，如 0120160524121052485  --》 00008sKrPTsBmv
class CDigitalConv62    : public CBaseDigitalConv
{
public:
    CDigitalConv62()
    {
        init("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
    }
    virtual ~CDigitalConv62(){}
};


//10进制和90进制的换算，如 0120160524121052485  --》 R;NKOY[U.
class CDigitalConv90    : public CBaseDigitalConv
{
public:
    CDigitalConv90()
    {
        init("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz~!@#$%^&*()_+-=[]{}|;:,./<>?");
    }
    virtual ~CDigitalConv90(){}
};

/*
测试例子：
    //0120160524121052485  --》 00008sKrPTsBmv
    CDigitalConv62 d62;
    string str10 = d62.to_10("00008sKrPTsBmv", 0);
    str10 = d62.to_10("00008sKrPTsBmv", 19);
    string str62 = d62.to_x("0120160524121052485", 0);
    str62 = d62.to_x("0120160524121052485", 14);

    //0120160524121052485  --》 R;NKOY[U.
    CDigitalConv90 d90;
    str10 = d90.to_10("R;NKOY[U.", 0);
    string str90 = d90.to_x("0120160524121052485", 0);
*/