C++代码转成C#问题！！！

[mzwww]

帮忙转换成C#，谢谢！！
void CClientRegicode::EncodeBase64MSG(char *Src,int Src_len,char *base64code)
{
int len,i,work_Len;
unsigned char* psrc ;
unsigned char Beign;
unsigned char rest ;
const char szBase64TableOld2[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; //$ 标准
const char szBase64TableOld [] = {'P','Q','R','S','T','U','a','b','c','d','e','f','g','h','A','B','C','D','E','K','L','M','y','z',
'0','1','N','O','V','W','X','Y','Z','i','j','k','q','r','s','5','6','7','8','9','t','u','v','w',
'x','2','3','4','+','/','F','G','H','I','J','l','m','n','o','p'}; //- * 变化
char szBase64Table [] = {'P','Q','R','S','T','U','a','b','c','d','e','f','g','h','A','B','C','D','E','K','L','M','y','z',
'0','1','N','O','V','W','X','Y','Z','i','j','k','q','r','s','5','6','7','8','9','t','u','v','w',
'x','2','3','4','+','/','F','G','H','I','J','l','m','n','o','p'}; //- * 变化
work_Len = Src_len;

if (Src[4]=='-'||Src[4]=='*'||Src[4]=='$')
{
psrc = (unsigned char*)&Src[5]; work_Len=work_Len-5;
*base64code=Src[0];base64code++;
*base64code=Src[1];base64code++;
*base64code=Src[2];base64code++;
*base64code=Src[3];base64code++;
*base64code=Src[4];base64code++;
i=atoi(Src) % 63;
if (i!=0)
{
if (Src[4]=='$')
{
memcpy(szBase64Table ,&szBase64TableOld2[i],64-i);
memcpy(&szBase64Table[64-i],szBase64TableOld2 ,i);
}
else
{
memcpy(szBase64Table ,&szBase64TableOld[i],64-i);
memcpy(&szBase64Table[64-i],szBase64TableOld ,i);
}
}
if (Src[4]=='*')
{
char buf[3];buf[2]=0;
len =1;*psrc++;
for (i = 1; i < work_Len ; i=i+2)
{
memcpy(buf,&Src[5+i],2);
*psrc=(unsigned char) (strtoul(buf,NULL,16));
*psrc++;
len++;
}
psrc = (unsigned char*)&Src[5];
work_Len=len;
}
}
else
psrc = (unsigned char*)Src;

rest=0;
Beign=0;
len = 0;
for (i = 0; i < work_Len ; i ++)
{
do
{
*base64code=szBase64Table[ ( Beign<<(6-rest) | *psrc>>(2+rest))&0x3f];
base64code++;
len++;
Beign=*psrc;
rest+=2;
if (rest==8)
{
rest=0;

}
} while (rest>=6);
psrc++;
}
if (rest!=0)
{
*base64code=szBase64Table[ ( Beign<<(6-rest) )&0x3f];
base64code++;
len++;
}
if (((len/4)*4)!=len)
for (i=0;i<((len/4)+1)*4-len;i++)
{
*base64code='=';
base64code++;
}
*base64code = '\0';
}

[xian_wwq]

如果不是强制性要求 个人感觉不需要转代码 把函数放到c dll中，对外提供extern c 的接口 c#通过PInvoke调用就好了

[mzwww]

没人理？？？？？

[mzwww]

大神呢？？？？

[mzwww]

就提供一段这样的代码给我，重新放到自己 的程序里，所以需要重写成C#。

[mzwww]

请老师们帮忙！

[mzwww]

帮忙顶上去!

[xuzuning]

你应该贴出解码程序作为参考

[ilikeff8]

如果图省事就用unsafe，大体是

        unsafe void EncodeBase64MSG(char* Src, int Src_len, char* base64code)
        {
            int len, i, work_Len;
            byte* psrc;
            byte Beign;
            byte rest;
            char[] szBase64TableOld2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".ToArray(); //$  标准
            char[] szBase64TableOld = {'P','Q','R','S','T','U','a','b','c','d','e','f','g','h','A','B','C','D','E','K','L','M','y','z',
                '0','1','N','O','V','W','X','Y','Z','i','j','k','q','r','s','5','6','7','8','9','t','u','v','w',
                'x','2','3','4','+','/','F','G','H','I','J','l','m','n','o','p'}; //- * 变化
            char[] szBase64Table = {'P','Q','R','S','T','U','a','b','c','d','e','f','g','h','A','B','C','D','E','K','L','M','y','z',
                '0','1','N','O','V','W','X','Y','Z','i','j','k','q','r','s','5','6','7','8','9','t','u','v','w',
                'x','2','3','4','+','/','F','G','H','I','J','l','m','n','o','p'}; //- * 变化	
            work_Len = Src_len;

            if (Src[4] == '-' || Src[4] == '*' || Src[4] == '$')
            {
                psrc = (byte*)&Src[5]; work_Len = work_Len - 5;
                *base64code = Src[0]; base64code++;
                *base64code = Src[1]; base64code++;
                *base64code = Src[2]; base64code++;
                *base64code = Src[3]; base64code++;
                *base64code = Src[4]; base64code++;
                i = Convert.ToInt32(Src[0]) % 63;
                if (i != 0)
                {
                    if (Src[4] == '$')
                    {
                        Buffer.BlockCopy(szBase64TableOld2, i, szBase64Table, 0, 64 - i);
                        Buffer.BlockCopy(szBase64TableOld2, 0, szBase64Table, 64 - i, i);
                    }
                    else
                    {
                        Buffer.BlockCopy(szBase64TableOld, i, szBase64Table, 0, 64 - i);
                        Buffer.BlockCopy(szBase64TableOld, 0, szBase64Table, 64 - i, i);
                    }
                }
                if (Src[4] == '*')
                {
                    char[] buf = new char[3]; buf[2] = '\0';
                    len = 1; psrc++;
                    for (i = 1; i < work_Len; i = i + 2)
                    {
                        buf[0] = Src[5 + i];
                        buf[1] = Src[5 + i + 1];

                        *psrc = Convert.ToByte(buf[0].ToString() + buf[1].ToString(), 16);

                        psrc++;
                        len++;
                    }
                    psrc = (byte*)&Src[5];
                    work_Len = len;
                }
            }
            else
                psrc = (byte*)Src;

            rest = 0;
            Beign = 0;
            len = 0;
            for (i = 0; i < work_Len; i++)
            {
                do
                {
                    *base64code = szBase64Table[(Beign << (6 - rest) | *psrc >> (2 + rest)) & 0x3f];
                    base64code++;
                    len++;
                    Beign = *psrc;
                    rest += 2;
                    if (rest == 8)
                    {
                        rest = 0;

                    }
                } while (rest >= 6);
                psrc++;
            }
            if (rest != 0)
            {
                *base64code = szBase64Table[(Beign << (6 - rest)) & 0x3f];
                base64code++;
                len++;
            }
            if (((len / 4) * 4) != len)
                for (i = 0; i < ((len / 4) + 1) * 4 - len; i++)
                {
                    *base64code = '=';
                    base64code++;
                }
            *base64code = '\0';
        }

[mzwww]

能不用unsafe和指针吗？谢谢！

[mzwww]

能不用unsafe和指针吗？谢谢！