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fixed rlp decoder error names

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This commit is contained in:
debris 2015-11-30 11:33:08 +01:00
parent 6ee5e1684b
commit bd6289756b
1 changed files with 16 additions and 16 deletions
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32
src/rlp.rs
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@ -83,10 +83,10 @@ impl ItemInfo {
#[derive(Debug, PartialEq, Eq)] #[derive(Debug, PartialEq, Eq)]
pub enum DecoderError { pub enum DecoderError {
FromBytesError(FromBytesError), FromBytesError(FromBytesError),
UntrustedRlpIsTooShort, RlpIsTooShort,
UntrustedRlpExpectedToBeList, RlpExpectedToBeList,
UntrustedRlpExpectedToBeValue, RlpExpectedToBeData,
BadUntrustedRlp, BadRlp,
} }
impl StdError for DecoderError { impl StdError for DecoderError {
fn description(&self) -> &str { fn description(&self) -> &str {
@ -230,7 +230,7 @@ impl<'a> UntrustedRlp<'a> {
/// ``` /// ```
pub fn at(&self, index: usize) -> Result<UntrustedRlp<'a>, DecoderError> { pub fn at(&self, index: usize) -> Result<UntrustedRlp<'a>, DecoderError> {
if !self.is_list() { if !self.is_list() {
return Err(DecoderError::UntrustedRlpExpectedToBeList); return Err(DecoderError::RlpExpectedToBeList);
} }
// move to cached position if it's index is less or equal to // move to cached position if it's index is less or equal to
@ -325,7 +325,7 @@ impl<'a> UntrustedRlp<'a> {
/// TODO: move this to decode_untrustedr? /// TODO: move this to decode_untrustedr?
fn item_info(bytes: &[u8]) -> Result<ItemInfo, DecoderError> { fn item_info(bytes: &[u8]) -> Result<ItemInfo, DecoderError> {
let item = match bytes.first().map(|&x| x) { let item = match bytes.first().map(|&x| x) {
None => return Err(DecoderError::UntrustedRlpIsTooShort), None => return Err(DecoderError::RlpIsTooShort),
Some(0...0x7f) => ItemInfo::new(0, 1), Some(0...0x7f) => ItemInfo::new(0, 1),
Some(l @ 0x80...0xb7) => ItemInfo::new(1, l as usize - 0x80), Some(l @ 0x80...0xb7) => ItemInfo::new(1, l as usize - 0x80),
Some(l @ 0xb8...0xbf) => { Some(l @ 0xb8...0xbf) => {
@ -341,12 +341,12 @@ impl<'a> UntrustedRlp<'a> {
let value_len = try!(usize::from_bytes(&bytes[1..prefix_len])); let value_len = try!(usize::from_bytes(&bytes[1..prefix_len]));
ItemInfo::new(prefix_len, value_len) ItemInfo::new(prefix_len, value_len)
} }
_ => return Err(DecoderError::BadUntrustedRlp), _ => return Err(DecoderError::BadRlp),
}; };
match item.prefix_len + item.value_len <= bytes.len() { match item.prefix_len + item.value_len <= bytes.len() {
true => Ok(item), true => Ok(item),
false => Err(DecoderError::UntrustedRlpIsTooShort), false => Err(DecoderError::RlpIsTooShort),
} }
} }
@ -354,7 +354,7 @@ impl<'a> UntrustedRlp<'a> {
fn consume(bytes: &'a [u8], len: usize) -> Result<&'a [u8], DecoderError> { fn consume(bytes: &'a [u8], len: usize) -> Result<&'a [u8], DecoderError> {
match bytes.len() >= len { match bytes.len() >= len {
true => Ok(&bytes[len..]), true => Ok(&bytes[len..]),
false => Err(DecoderError::UntrustedRlpIsTooShort), false => Err(DecoderError::RlpIsTooShort),
} }
} }
} }
@ -448,7 +448,7 @@ impl<T> Decodable for T where T: FromBytes {
true => BasicDecoder::read_value(rlp.bytes, | bytes | { true => BasicDecoder::read_value(rlp.bytes, | bytes | {
Ok(try!(T::from_bytes(bytes))) Ok(try!(T::from_bytes(bytes)))
}), }),
false => Err(DecoderError::UntrustedRlpExpectedToBeValue), false => Err(DecoderError::RlpExpectedToBeData),
} }
} }
} }
@ -457,7 +457,7 @@ impl<T> Decodable for Vec<T> where T: Decodable {
fn decode_untrusted(rlp: &UntrustedRlp) -> Result<Self, DecoderError> { fn decode_untrusted(rlp: &UntrustedRlp) -> Result<Self, DecoderError> {
match rlp.is_list() { match rlp.is_list() {
true => rlp.iter().map(|rlp| T::decode_untrusted(&rlp)).collect(), true => rlp.iter().map(|rlp| T::decode_untrusted(&rlp)).collect(),
false => Err(DecoderError::UntrustedRlpExpectedToBeList), false => Err(DecoderError::RlpExpectedToBeList),
} }
} }
} }
@ -470,7 +470,7 @@ impl Decodable for Vec<u8> {
res.extend(bytes); res.extend(bytes);
Ok(res) Ok(res)
}), }),
false => Err(DecoderError::UntrustedRlpExpectedToBeValue), false => Err(DecoderError::RlpExpectedToBeData),
} }
} }
} }
@ -485,7 +485,7 @@ impl Decoder for BasicDecoder {
fn read_value<T, F>(bytes: &[u8], f: F) -> Result<T, DecoderError> where F: FnOnce(&[u8]) -> Result<T, DecoderError> { fn read_value<T, F>(bytes: &[u8], f: F) -> Result<T, DecoderError> where F: FnOnce(&[u8]) -> Result<T, DecoderError> {
match bytes.first().map(|&x| x) { match bytes.first().map(|&x| x) {
// rlp is too short // rlp is too short
None => Err(DecoderError::UntrustedRlpIsTooShort), None => Err(DecoderError::RlpIsTooShort),
// single byt value // single byt value
Some(l @ 0...0x7f) => Ok(try!(f(&[l]))), Some(l @ 0...0x7f) => Ok(try!(f(&[l]))),
// 0-55 bytes // 0-55 bytes
@ -497,7 +497,7 @@ impl Decoder for BasicDecoder {
let len = try!(usize::from_bytes(&bytes[1..begin_of_value])); let len = try!(usize::from_bytes(&bytes[1..begin_of_value]));
Ok(try!(f(&bytes[begin_of_value..begin_of_value + len]))) Ok(try!(f(&bytes[begin_of_value..begin_of_value + len])))
} }
_ => Err(DecoderError::BadUntrustedRlp), _ => Err(DecoderError::BadRlp),
} }
} }
} }
@ -860,10 +860,10 @@ mod tests {
assert!(rlp.is_list()); assert!(rlp.is_list());
let cat_err = rlp.at(0).unwrap_err(); let cat_err = rlp.at(0).unwrap_err();
assert_eq!(cat_err, rlp::DecoderError::UntrustedRlpIsTooShort); assert_eq!(cat_err, rlp::DecoderError::RlpIsTooShort);
let dog_err = rlp.at(1).unwrap_err(); let dog_err = rlp.at(1).unwrap_err();
assert_eq!(dog_err, rlp::DecoderError::UntrustedRlpIsTooShort); assert_eq!(dog_err, rlp::DecoderError::RlpIsTooShort);
} }
} }