wdg-base32 0.2.1

The Base32 Data Encoding
Documentation 
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impl B32Encode<String,String> for B32<String>{
    fn encode(data:String)->String{
        let mut len_data:usize=data.len();
        let mut ptr_data:*const u8=data.as_ptr();
        let size:usize=len_data/5*8+if len_data%5==0 {0}else{8};
        let mut string:String=String::with_capacity(size);
        unsafe{
            let mut vector=&mut string.as_mut_vec();
            vector.resize(size,0);
            let mut pointer=vector.as_mut_ptr();
            let ptr_alphabet=ALPHABET32.as_ptr();
            let mut d:u64;
            while len_data>8{
                d=(*(ptr_data as *const u64)).to_be();
                *pointer.offset(0)=*ptr_alphabet.offset((((d>>59))&0b11111) as isize);
                *pointer.offset(1)=*ptr_alphabet.offset((((d>>54))&0b11111) as isize);
                *pointer.offset(2)=*ptr_alphabet.offset((((d>>49))&0b11111) as isize);
                *pointer.offset(3)=*ptr_alphabet.offset((((d>>44))&0b11111) as isize);
                *pointer.offset(4)=*ptr_alphabet.offset((((d>>39))&0b11111) as isize);
                *pointer.offset(5)=*ptr_alphabet.offset((((d>>34))&0b11111) as isize);
                *pointer.offset(6)=*ptr_alphabet.offset((((d>>29))&0b11111) as isize);
                *pointer.offset(7)=*ptr_alphabet.offset((((d>>24))&0b11111) as isize);
                pointer=pointer.offset(8);
                ptr_data=ptr_data.offset(5);
                len_data-=5;
            }
            while len_data>4{
                *pointer.offset(0)=*ptr_alphabet.offset(((*ptr_data.offset(0)&0b11111000)>>3) as isize);
                *pointer.offset(1)=*ptr_alphabet.offset((((*ptr_data.offset(0)&0b00000111)<<2)|((*ptr_data.offset(1)&0b11000000)>>6)) as isize);
                *pointer.offset(2)=*ptr_alphabet.offset(((*ptr_data.offset(1)&0b00111110)>>1) as isize);
                *pointer.offset(3)=*ptr_alphabet.offset((((*ptr_data.offset(1)&0b00000001)<<4)|((*ptr_data.offset(2)&0b11110000)>>4)) as isize);
                *pointer.offset(4)=*ptr_alphabet.offset((((*ptr_data.offset(2)&0b00001111)<<1)|((*ptr_data.offset(3)&0b10000000)>>7)) as isize);
                *pointer.offset(5)=*ptr_alphabet.offset(((*ptr_data.offset(3)&0b01111100)>>2) as isize);
                *pointer.offset(6)=*ptr_alphabet.offset((((*ptr_data.offset(3)&0b00000011)<<3)|((*ptr_data.offset(4)&0b11100000)>>5)) as isize);
                *pointer.offset(7)=*ptr_alphabet.offset(((*ptr_data.offset(4)&0b00011111)>>0) as isize);
                pointer=pointer.offset(8);
                ptr_data=ptr_data.offset(5);
                len_data-=5;
            }
            if len_data==4{
                *pointer.offset(0)=*ptr_alphabet.offset(((*ptr_data.offset(0)&0b11111000)>>3) as isize);
                *pointer.offset(1)=*ptr_alphabet.offset((((*ptr_data.offset(0)&0b00000111)<<2)|((*ptr_data.offset(1)&0b11000000)>>6)) as isize);
                *pointer.offset(2)=*ptr_alphabet.offset(((*ptr_data.offset(1)&0b00111110)>>1) as isize);
                *pointer.offset(3)=*ptr_alphabet.offset((((*ptr_data.offset(1)&0b00000001)<<4)|((*ptr_data.offset(2)&0b11110000)>>4)) as isize);
                *pointer.offset(4)=*ptr_alphabet.offset((((*ptr_data.offset(2)&0b00001111)<<1)|((*ptr_data.offset(3)&0b10000000)>>7)) as isize);
                *pointer.offset(5)=*ptr_alphabet.offset(((*ptr_data.offset(3)&0b01111100)>>2) as isize);
                *pointer.offset(6)=*ptr_alphabet.offset(((*ptr_data.offset(3)&0b00000011)<<3) as isize);
                *pointer.offset(7)=61;
            }else{
                if len_data==3{
                    *pointer.offset(0)=*ptr_alphabet.offset(((*ptr_data.offset(0)&0b11111000)>>3) as isize);
                    *pointer.offset(1)=*ptr_alphabet.offset((((*ptr_data.offset(0)&0b00000111)<<2)|((*ptr_data.offset(1)&0b11000000)>>6)) as isize);
                    *pointer.offset(2)=*ptr_alphabet.offset(((*ptr_data.offset(1)&0b00111110)>>1) as isize);
                    *pointer.offset(3)=*ptr_alphabet.offset((((*ptr_data.offset(1)&0b00000001)<<4)|((*ptr_data.offset(2)&0b11110000)>>4)) as isize);
                    *pointer.offset(4)=*ptr_alphabet.offset(((*ptr_data.offset(2)&0b00001111)<<1) as isize);
                    *pointer.offset(5)=61;
                    *pointer.offset(6)=61;
                    *pointer.offset(7)=61;
                }else{
                    if len_data==2{
                        *pointer.offset(0)=*ptr_alphabet.offset(((*ptr_data.offset(0)&0b11111000)>>3) as isize);
                        *pointer.offset(1)=*ptr_alphabet.offset((((*ptr_data.offset(0)&0b00000111)<<2)|((*ptr_data.offset(1)&0b11000000)>>6)) as isize);
                        *pointer.offset(2)=*ptr_alphabet.offset(((*ptr_data.offset(1)&0b00111110)>>1) as isize);
                        *pointer.offset(3)=*ptr_alphabet.offset(((*ptr_data.offset(1)&0b00000001)<<4) as isize);
                        *pointer.offset(4)=61;
                        *pointer.offset(5)=61;
                        *pointer.offset(6)=61;
                        *pointer.offset(7)=61;
                    }else{
                        if len_data==1{
                            *pointer.offset(0)=*ptr_alphabet.offset(((*ptr_data.offset(0)&0b11111000)>>3) as isize);
                            *pointer.offset(1)=*ptr_alphabet.offset(((*ptr_data.offset(0)&0b00000111)<<2) as isize);
                            *pointer.offset(2)=61;
                            *pointer.offset(3)=61;
                            *pointer.offset(4)=61;
                            *pointer.offset(5)=61;
                            *pointer.offset(6)=61;
                            *pointer.offset(7)=61;
                        }
                    }
                }
            }
        }
        return string;
    }
}