VC Implementation URL Codec

    BOOL Decodeurl (char *src, char *url, int maxlen) {if (NULL = = URL | |          NULL = = SRC) {return false;          } if (MaxLen = = 0) {return false;  } char *p = SRC;    Used to loop int i = 0;          I used to control the URL array/* Temporarily save URL encoded data such as:%1A%2B%3C */char t = ' + ';                  while (*p! = ' \ ' && maxlen--) {if (*p = = 0x25)//0x25 = '% ' {                  /* The following are the usual uppercase letters, lowercase letters, numbers in hexadecimal numbers * * * if (p[1] >= ' A ' && p[1] <= ' Z ')//capital letters  {t = p[1]-' A ' + 10;                  A = 10, same as} else if (p[1] >= ' A ' && p[1] <= ' z ')//lowercase Letter                  {t = p[1]-' a ' + 10; } else if (p[1] >= ' 0 ' && p[1] <= ' 9 ')//number {T = P[1]-' 0 ';  } t *= 16;                      Put the number on 10 bit up if (p[2] >= ' A ' && p[2] <= ' Z ')//capital Letter {                  T + = p[2]-' A ' + 10; } else if (p[2] >= ' A ' && p[2] <= ' z ')//lowercase letter {T + =                  P[2]-' a ' + 10; } else if (p[2] >= ' 0 ' && p[2] <= ' 9 ')//number {T + = p[                  2]-' 0 ';                        }//To this composite a hexadecimal number url[i] = t;              p + = 3, i++; } else {//does not have URL-encoded data//' + ' special handling. It's equivalent to a space I                  F (*p! = ' + ') {url[i] = *p;                  } else {url[i] = 0x20;                  } i++;    p++;          }} Url[i] = ' + ';      Terminator return true;   }

VC Implementation URL Codec