15     let src_len = src.len() as LenType;  in encode_block()  localVariable
17     let len = encoded_len(src_len).unwrap();  in encode_block()
25         let out_len = ffi::EVP_EncodeBlock(out.as_mut_ptr(), src.as_ptr(), src_len);  in encode_block()
46     let src_len = src.len() as LenType;  in decode_block()  localVariable
48     let len = decoded_len(src_len).unwrap();  in decode_block()
60             src_len,  in decode_block()
75 fn encoded_len(src_len: LenType) -> Option<LenType> {  in encoded_len()
76     let mut len = (src_len / 3).checked_mul(4)?;  in encoded_len()
78     if src_len % 3 != 0 {  in encoded_len()
87 fn decoded_len(src_len: LenType) -> Option<LenType> {  in decoded_len()
88     let mut len = (src_len / 4).checked_mul(3)?;  in decoded_len()
90     if src_len % 4 != 0 {  in decoded_len()