3b1c9172f6
Use the same format as Display, b3: followed by the base64 representation. This makes the debug implementation of everything containing a b3 digest much nicer to read. Change-Id: I3ca3154d0b6fb07781c8f9c83ece3ff1a6957902 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11181 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
86 lines
2 KiB
Rust
86 lines
2 KiB
Rust
use bytes::Bytes;
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use data_encoding::BASE64;
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use thiserror::Error;
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#[derive(PartialEq, Eq, Hash)]
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pub struct B3Digest(Bytes);
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// TODO: allow converting these errors to crate::Error
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#[derive(Error, Debug)]
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pub enum Error {
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#[error("invalid digest length: {0}")]
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InvalidDigestLen(usize),
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}
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pub const B3_LEN: usize = 32;
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impl B3Digest {
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pub fn as_slice(&self) -> &[u8] {
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&self.0[..]
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}
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}
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impl From<B3Digest> for bytes::Bytes {
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fn from(val: B3Digest) -> Self {
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val.0
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}
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}
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impl From<digest::Output<blake3::Hasher>> for B3Digest {
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fn from(value: digest::Output<blake3::Hasher>) -> Self {
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let v = Into::<[u8; B3_LEN]>::into(value);
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Self(Bytes::copy_from_slice(&v))
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}
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}
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impl TryFrom<Vec<u8>> for B3Digest {
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type Error = Error;
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// constructs a [B3Digest] from a [Vec<u8>].
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// Returns an error if the digest has the wrong length.
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fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
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if value.len() != B3_LEN {
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Err(Error::InvalidDigestLen(value.len()))
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} else {
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Ok(Self(value.into()))
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}
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}
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}
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impl TryFrom<bytes::Bytes> for B3Digest {
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type Error = Error;
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// constructs a [B3Digest] from a [bytes::Bytes].
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// Returns an error if the digest has the wrong length.
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fn try_from(value: bytes::Bytes) -> Result<Self, Self::Error> {
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if value.len() != B3_LEN {
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Err(Error::InvalidDigestLen(value.len()))
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} else {
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Ok(Self(value))
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}
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}
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}
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impl From<&[u8; B3_LEN]> for B3Digest {
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fn from(value: &[u8; B3_LEN]) -> Self {
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Self(value.to_vec().into())
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}
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}
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impl Clone for B3Digest {
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fn clone(&self) -> Self {
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Self(self.0.to_owned())
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}
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}
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impl std::fmt::Display for B3Digest {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "b3:{}", BASE64.encode(&self.0))
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}
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}
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impl std::fmt::Debug for B3Digest {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "b3:{}", BASE64.encode(&self.0))
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}
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}
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