wdg-base32 0.3.3

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_ENCODE.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;
    }
}

impl B32Decode<String,String> for B32<String>{
    fn validation(data:String)->B32DecodeError{return b32_validation(data.as_ptr(),data.len(),ALPHABET32_DECODE.as_ptr(),6,0b1011011,8);}
    fn decode(data:String)->Result<String,B32DecodeError>{
        let ptr_data:*const u8=data.as_ptr();
        let len_data:usize=data.len();
        let ptr_alphabet:*const u8=ALPHABET32_DECODE.as_ptr();
        let error=b32_validation(ptr_data,len_data,ptr_alphabet,6,0b1011011,8);
        if error!=B32DecodeError::Null {return Err(error)};
        // return Ok(b32_decode(ptr_data,len_data,ptr_alphabet));

        let np=unsafe{
            if len_data>6 {
                if *ptr_data.offset((len_data-6) as isize)==61 {6}else{
                    if *ptr_data.offset((len_data-4) as isize)==61 {4}else{
                        if *ptr_data.offset((len_data-3) as isize)==61 {3}else{
                            if *ptr_data.offset((len_data-1) as isize)==61 {1}else{0}
                        }
                    }
                }
            }else{0}
        };
        let size=(len_data-np)*5/8;
        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();
            b32_decode2(ptr_data,len_data,ptr_alphabet,pointer,np);
        }
        return Ok(string);
    }
    unsafe fn unsafe_decode(data:String)->String{return b32_decode(data.as_ptr(),data.len(),ALPHABET32_DECODE.as_ptr());}
}