UTF-8 URL地址解码 (ANSI & UNICODE CODE)

这东西是我前些日子在写YDownloadHLoli的时候
为了在使用URLDownloadToFile时 可以转换字符串以获取文件名而写的一个函数
已经通过了Hloli上的各种URL地址测试~
每次都是可以准确转换地~
网上找到的一些代码要不然就是转换不了中文要不然就用了string类
而本人不知道是为什么 异常讨厌string这东西……
So ,自己动手 丰衣足食~
多说无益，代码如下

//////////////////////////////////////////////////////////////////////////
// UTF-8 URL 地址解析 ANSI & UNICODE 代码
//作者:wye-MIA kid C!
//作者主页:http://wye-ANGer.blogspot.com
//转载请注明出处

#include <windows.h>
#include <stdio.h>

#define IsHexNum(c) ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'))

int HexToDec(const char* hex)
{
    char buff[12];
     sprintf(buff,"%s",hex);
    int ret = 0;
    int len = strlen(buff);
    for(int i=0;i<len;i++)
     {
        char tmp[2];
         tmp[0] = tolower(buff[i]);
         tmp[1] = '\0';
        int tmp_i;

        if ('a' <= tmp[0] && tmp[0] <= 'g')
             tmp_i = 10 - 'a' + tmp[0];
        else tmp_i = tmp[0] - '0';

        int rs = 1;
        for(int j=i;j<(len-1);j++)
         {
             rs *= 16;
         }
         ret += (rs * tmp_i);
     }
    return ret;
}

CHAR *URLDecodeA(CHAR *URL_IN)
{
    int len = strlen(URL_IN),pos=0;
    char* URLA = new char[len + 1];
     strcpy(URLA,URL_IN);
    char* ret =new char[len + 1];
    for(int i=0;i<len;i++)
     {
        if(URLA[i] == '%' && IsHexNum(URLA[i+1]) && IsHexNum(URLA[i+2]))
         {
            char tmp[2];
            char hex[3];
             hex[0] = URLA[++i];
             hex[1] = URLA[++i];
             hex[2] = '\0';      
            int hex_i = atoi(hex);
             sprintf(tmp,"%c",HexToDec(hex));
             strcat(ret,tmp);
         }
        else
         {
             ret[pos] = URLA[i];
             ret[pos+1] = '\0';
         }
         pos++;
     }
     delete[] URLA;
     ret[pos+1]='\0';
    return ret;
}

WCHAR *URLDecodeW(WCHAR *URLW)
{
    int len = wcslen(URLW),pos=0;
    char* URLA = new char[len + 1];
     WideCharToMultiByte(CP_ACP,0,URLW,len+1,URLA,len+1,NULL,NULL);
    char* ret =new char[len + 1];
    for(int i=0;i<len;i++)
     {
        if(URLA[i] == '%' && IsHexNum(URLA[i+1]) && IsHexNum(URLA[i+2]))
         {
            char tmp[2];
            char hex[3];
             hex[0] = URLA[++i];
             hex[1] = URLA[++i];
             hex[2] = '\0';      
            int hex_i = atoi(hex);
             sprintf(tmp,"%c",HexToDec(hex));
             strcat(ret,tmp);
         }
        else
         {
             ret[pos] = URLA[i];
             ret[pos+1] = '\0';
         }
         pos++;
     }
     delete[] URLA;
     ret[pos+1]='\0';

     WCHAR *result = L"";
     MultiByteToWideChar(CP_ACP,0,ret,pos+1,result,pos+1);
    return result;
}