wdg-base32 0.3.5

The Base32 Data Encoding
Documentation 
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impl B32Encode<String,String> for B32<String>{
    fn encode(data:String)->String{
        return b32_encode(data.as_ptr(),data.len(),ALPHABET32_ENCODE.as_ptr());
    }
}

impl B32Encode<&'static str,String> for B32<String>{
    fn encode(data:&'static str)->String{
        return b32_encode(data.as_ptr(),data.len(),ALPHABET32_ENCODE.as_ptr());
    }
}

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 pointer=vector.as_mut_ptr();
            b32_decode(ptr_data,len_data,ptr_alphabet,pointer,np);
        }
        return Ok(string);
    }
    unsafe fn unsafe_decode(data:String)->String{
        let ptr_data:*const u8=data.as_ptr();
        let len_data:usize=data.len();
        let ptr_alphabet:*const u8=ALPHABET32_DECODE.as_ptr();
        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 pointer=vector.as_mut_ptr();
            b32_decode(ptr_data,len_data,ptr_alphabet,pointer,np);
        }
        return string;
    }
}