Make opaque::Encoder append-only and make it infallible
This commit is contained in:
John Kåre Alsaker
parent
971f7d34d4
commit
14d3c6e8f4
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@ -52,7 +52,8 @@ impl Fingerprint {
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pub fn encode_opaque(&self, encoder: &mut Encoder) -> EncodeResult {
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let bytes: [u8; 16] = unsafe { mem::transmute([self.0.to_le(), self.1.to_le()]) };
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encoder.emit_raw_bytes(&bytes)
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encoder.emit_raw_bytes(&bytes);
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Ok(())
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}
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pub fn decode_opaque<'a>(decoder: &mut Decoder<'a>) -> Result<Fingerprint, String> {
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@ -92,7 +93,7 @@ impl serialize::UseSpecializedEncodable for Fingerprint { }
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impl serialize::UseSpecializedDecodable for Fingerprint { }
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impl<'a> serialize::SpecializedEncoder<Fingerprint> for serialize::opaque::Encoder<'a> {
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impl serialize::SpecializedEncoder<Fingerprint> for serialize::opaque::Encoder {
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fn specialized_encode(&mut self, f: &Fingerprint) -> Result<(), Self::Error> {
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f.encode_opaque(self)
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}
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@ -54,7 +54,7 @@ pub trait TyEncoder: Encoder {
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fn position(&self) -> usize;
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}
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impl<'buf> TyEncoder for opaque::Encoder<'buf> {
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impl TyEncoder for opaque::Encoder {
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#[inline]
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fn position(&self) -> usize {
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self.position()
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@ -979,7 +979,7 @@ impl<'enc, 'a, 'tcx, E> SpecializedEncoder<NodeId> for CacheEncoder<'enc, 'a, 't
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}
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impl<'enc, 'a, 'tcx> SpecializedEncoder<Fingerprint>
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for CacheEncoder<'enc, 'a, 'tcx, opaque::Encoder<'enc>>
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for CacheEncoder<'enc, 'a, 'tcx, opaque::Encoder>
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{
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fn specialized_encode(&mut self, f: &Fingerprint) -> Result<(), Self::Error> {
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f.encode_opaque(&mut self.encoder)
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@ -1057,7 +1057,7 @@ impl IntEncodedWithFixedSize {
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impl UseSpecializedEncodable for IntEncodedWithFixedSize {}
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impl UseSpecializedDecodable for IntEncodedWithFixedSize {}
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impl<'enc> SpecializedEncoder<IntEncodedWithFixedSize> for opaque::Encoder<'enc> {
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impl SpecializedEncoder<IntEncodedWithFixedSize> for opaque::Encoder {
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fn specialized_encode(&mut self, x: &IntEncodedWithFixedSize) -> Result<(), Self::Error> {
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let start_pos = self.position();
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for i in 0 .. IntEncodedWithFixedSize::ENCODED_SIZE {
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@ -230,8 +230,7 @@ impl WasmEncoder {
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}
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fn u32(&mut self, val: u32) {
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let at = self.data.len();
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leb128::write_u32_leb128(&mut self.data, at, val);
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leb128::write_u32_leb128(&mut self.data, val);
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}
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fn byte(&mut self, val: u8) {
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@ -25,6 +25,7 @@ use std::fs;
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use std::env;
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use rustc::session::config::nightly_options;
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use rustc_serialize::opaque::Encoder;
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/// The first few bytes of files generated by incremental compilation
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const FILE_MAGIC: &'static [u8] = b"RSIC";
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@ -37,17 +38,15 @@ const HEADER_FORMAT_VERSION: u16 = 0;
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/// the git commit hash.
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const RUSTC_VERSION: Option<&'static str> = option_env!("CFG_VERSION");
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pub fn write_file_header<W: io::Write>(stream: &mut W) -> io::Result<()> {
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stream.write_all(FILE_MAGIC)?;
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stream.write_all(&[(HEADER_FORMAT_VERSION >> 0) as u8,
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(HEADER_FORMAT_VERSION >> 8) as u8])?;
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pub fn write_file_header(stream: &mut Encoder) {
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stream.emit_raw_bytes(FILE_MAGIC);
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stream.emit_raw_bytes(&[(HEADER_FORMAT_VERSION >> 0) as u8,
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(HEADER_FORMAT_VERSION >> 8) as u8]);
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let rustc_version = rustc_version();
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assert_eq!(rustc_version.len(), (rustc_version.len() as u8) as usize);
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stream.write_all(&[rustc_version.len() as u8])?;
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stream.write_all(rustc_version.as_bytes())?;
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Ok(())
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stream.emit_raw_bytes(&[rustc_version.len() as u8]);
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stream.emit_raw_bytes(rustc_version.as_bytes());
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}
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/// Reads the contents of a file with a file header as defined in this module.
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@ -16,7 +16,6 @@ use rustc_data_structures::fx::FxHashMap;
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use rustc_data_structures::sync::join;
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use rustc_serialize::Encodable as RustcEncodable;
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use rustc_serialize::opaque::Encoder;
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use std::io::{self, Cursor};
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use std::fs;
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use std::path::PathBuf;
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@ -98,7 +97,7 @@ pub fn save_work_product_index(sess: &Session,
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}
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fn save_in<F>(sess: &Session, path_buf: PathBuf, encode: F)
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where F: FnOnce(&mut Encoder) -> io::Result<()>
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where F: FnOnce(&mut Encoder)
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{
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debug!("save: storing data in {}", path_buf.display());
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@ -121,20 +120,12 @@ fn save_in<F>(sess: &Session, path_buf: PathBuf, encode: F)
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}
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// generate the data in a memory buffer
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let mut wr = Cursor::new(Vec::new());
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file_format::write_file_header(&mut wr).unwrap();
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match encode(&mut Encoder::new(&mut wr)) {
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Ok(()) => {}
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Err(err) => {
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sess.err(&format!("could not encode dep-graph to `{}`: {}",
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path_buf.display(),
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err));
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return;
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}
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}
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let mut encoder = Encoder::new(Vec::new());
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file_format::write_file_header(&mut encoder);
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encode(&mut encoder);
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// write the data out
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let data = wr.into_inner();
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let data = encoder.into_inner();
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match fs::write(&path_buf, data) {
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Ok(_) => {
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debug!("save: data written to disk successfully");
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@ -149,10 +140,9 @@ fn save_in<F>(sess: &Session, path_buf: PathBuf, encode: F)
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}
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fn encode_dep_graph(tcx: TyCtxt,
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encoder: &mut Encoder)
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-> io::Result<()> {
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encoder: &mut Encoder) {
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// First encode the commandline arguments hash
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tcx.sess.opts.dep_tracking_hash().encode(encoder)?;
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tcx.sess.opts.dep_tracking_hash().encode(encoder).unwrap();
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// Encode the graph data.
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let serialized_graph = time(tcx.sess, "getting serialized graph", || {
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@ -234,14 +224,12 @@ fn encode_dep_graph(tcx: TyCtxt,
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}
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time(tcx.sess, "encoding serialized graph", || {
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serialized_graph.encode(encoder)
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})?;
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Ok(())
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serialized_graph.encode(encoder).unwrap();
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});
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}
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fn encode_work_product_index(work_products: &FxHashMap<WorkProductId, WorkProduct>,
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encoder: &mut Encoder) -> io::Result<()> {
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encoder: &mut Encoder) {
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let serialized_products: Vec<_> = work_products
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.iter()
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.map(|(id, work_product)| {
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@ -252,13 +240,12 @@ fn encode_work_product_index(work_products: &FxHashMap<WorkProductId, WorkProduc
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})
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.collect();
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serialized_products.encode(encoder)
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serialized_products.encode(encoder).unwrap();
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}
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fn encode_query_cache(tcx: TyCtxt,
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encoder: &mut Encoder)
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-> io::Result<()> {
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encoder: &mut Encoder) {
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time(tcx.sess, "serialize query result cache", || {
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tcx.serialize_query_result_cache(encoder)
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tcx.serialize_query_result_cache(encoder).unwrap();
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})
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}
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@ -35,8 +35,6 @@ use rustc_data_structures::stable_hasher::StableHasher;
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use rustc_serialize::{Encodable, Encoder, SpecializedEncoder, opaque};
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use std::hash::Hash;
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use std::io::prelude::*;
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use std::io::Cursor;
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use std::path::Path;
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use rustc_data_structures::sync::Lrc;
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use std::u32;
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@ -52,7 +50,7 @@ use rustc::hir::intravisit::{Visitor, NestedVisitorMap};
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use rustc::hir::intravisit;
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pub struct EncodeContext<'a, 'tcx: 'a> {
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opaque: opaque::Encoder<'a>,
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opaque: opaque::Encoder,
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pub tcx: TyCtxt<'a, 'tcx, 'tcx>,
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link_meta: &'a LinkMeta,
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@ -76,7 +74,7 @@ macro_rules! encoder_methods {
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}
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impl<'a, 'tcx> Encoder for EncodeContext<'a, 'tcx> {
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type Error = <opaque::Encoder<'a> as Encoder>::Error;
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type Error = <opaque::Encoder as Encoder>::Error;
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fn emit_nil(&mut self) -> Result<(), Self::Error> {
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Ok(())
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@ -480,7 +478,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
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// Index the items
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i = self.position();
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let index = items.write_index(&mut self.opaque.cursor);
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let index = items.write_index(&mut self.opaque);
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let index_bytes = self.position() - i;
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let attrs = tcx.hir.krate_attrs();
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@ -537,7 +535,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
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if self.tcx.sess.meta_stats() {
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let mut zero_bytes = 0;
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for e in self.opaque.cursor.get_ref() {
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for e in self.opaque.data.iter() {
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if *e == 0 {
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zero_bytes += 1;
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}
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@ -1797,15 +1795,15 @@ pub fn encode_metadata<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
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link_meta: &LinkMeta)
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-> EncodedMetadata
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{
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let mut cursor = Cursor::new(vec![]);
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cursor.write_all(METADATA_HEADER).unwrap();
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let mut encoder = opaque::Encoder::new(vec![]);
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encoder.emit_raw_bytes(METADATA_HEADER);
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// Will be filled with the root position after encoding everything.
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cursor.write_all(&[0, 0, 0, 0]).unwrap();
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encoder.emit_raw_bytes(&[0, 0, 0, 0]);
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let root = {
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let (root, mut result) = {
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let mut ecx = EncodeContext {
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opaque: opaque::Encoder::new(&mut cursor),
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opaque: encoder,
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tcx,
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link_meta,
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lazy_state: LazyState::NoNode,
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@ -1821,9 +1819,9 @@ pub fn encode_metadata<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
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// Encode all the entries and extra information in the crate,
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// culminating in the `CrateRoot` which points to all of it.
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ecx.encode_crate_root()
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let root = ecx.encode_crate_root();
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(root, ecx.opaque.into_inner())
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};
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let mut result = cursor.into_inner();
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// Encode the root position.
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let header = METADATA_HEADER.len();
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@ -11,7 +11,7 @@
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use schema::*;
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use rustc::hir::def_id::{DefId, DefIndex, DefIndexAddressSpace};
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use std::io::{Cursor, Write};
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use rustc_serialize::opaque::Encoder;
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use std::slice;
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use std::u32;
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@ -54,15 +54,15 @@ impl Index {
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self.positions[space_index][array_index] = position.to_le();
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}
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pub fn write_index(&self, buf: &mut Cursor<Vec<u8>>) -> LazySeq<Index> {
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pub fn write_index(&self, buf: &mut Encoder) -> LazySeq<Index> {
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let pos = buf.position();
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// First we write the length of the lower range ...
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buf.write_all(words_to_bytes(&[(self.positions[0].len() as u32).to_le()])).unwrap();
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buf.emit_raw_bytes(words_to_bytes(&[(self.positions[0].len() as u32).to_le()]));
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// ... then the values in the lower range ...
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buf.write_all(words_to_bytes(&self.positions[0][..])).unwrap();
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buf.emit_raw_bytes(words_to_bytes(&self.positions[0][..]));
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// ... then the values in the higher range.
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buf.write_all(words_to_bytes(&self.positions[1][..])).unwrap();
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buf.emit_raw_bytes(words_to_bytes(&self.positions[1][..]));
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LazySeq::with_position_and_length(pos as usize,
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self.positions[0].len() + self.positions[1].len() + 1)
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}
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@ -9,12 +9,8 @@
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// except according to those terms.
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#[inline]
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pub fn write_to_vec(vec: &mut Vec<u8>, position: usize, byte: u8) {
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if position == vec.len() {
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vec.push(byte);
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} else {
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vec[position] = byte;
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}
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pub fn write_to_vec(vec: &mut Vec<u8>, byte: u8) {
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vec.push(byte);
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}
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#[cfg(target_pointer_width = "32")]
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@ -33,8 +29,7 @@ macro_rules! leb128_size {
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macro_rules! impl_write_unsigned_leb128 {
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($fn_name:ident, $int_ty:ident) => (
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#[inline]
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pub fn $fn_name(out: &mut Vec<u8>, start_position: usize, mut value: $int_ty) -> usize {
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let mut position = start_position;
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pub fn $fn_name(out: &mut Vec<u8>, mut value: $int_ty) {
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for _ in 0 .. leb128_size!($int_ty) {
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let mut byte = (value & 0x7F) as u8;
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value >>= 7;
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@ -42,15 +37,12 @@ macro_rules! impl_write_unsigned_leb128 {
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byte |= 0x80;
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}
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write_to_vec(out, position, byte);
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position += 1;
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write_to_vec(out, byte);
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if value == 0 {
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break;
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}
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}
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position - start_position
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}
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)
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}
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@ -105,11 +97,9 @@ impl_read_unsigned_leb128!(read_usize_leb128, usize);
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/// The callback `write` is called once for each position
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/// that is to be written to with the byte to be encoded
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/// at that position.
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pub fn write_signed_leb128_to<W>(mut value: i128, mut write: W) -> usize
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where W: FnMut(usize, u8)
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pub fn write_signed_leb128_to<W>(mut value: i128, mut write: W)
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where W: FnMut(u8)
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{
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let mut position = 0;
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loop {
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let mut byte = (value as u8) & 0x7f;
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value >>= 7;
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@ -120,18 +110,16 @@ pub fn write_signed_leb128_to<W>(mut value: i128, mut write: W) -> usize
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byte |= 0x80; // Mark this byte to show that more bytes will follow.
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}
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write(position, byte);
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position += 1;
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write(byte);
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if !more {
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break;
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}
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}
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position
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}
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pub fn write_signed_leb128(out: &mut Vec<u8>, start_position: usize, value: i128) -> usize {
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write_signed_leb128_to(value, |i, v| write_to_vec(out, start_position+i, v))
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pub fn write_signed_leb128(out: &mut Vec<u8>, value: i128) {
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write_signed_leb128_to(value, |v| write_to_vec(out, v))
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}
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#[inline]
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@ -167,9 +155,7 @@ macro_rules! impl_test_unsigned_leb128 {
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let mut stream = Vec::new();
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for x in 0..62 {
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let pos = stream.len();
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let bytes_written = $write_fn_name(&mut stream, pos, (3u64 << x) as $int_ty);
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assert_eq!(stream.len(), pos + bytes_written);
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$write_fn_name(&mut stream, (3u64 << x) as $int_ty);
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}
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let mut position = 0;
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@ -195,9 +181,7 @@ fn test_signed_leb128() {
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let values: Vec<_> = (-500..500).map(|i| i * 0x12345789ABCDEF).collect();
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let mut stream = Vec::new();
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for &x in &values {
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let pos = stream.len();
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let bytes_written = write_signed_leb128(&mut stream, pos, x);
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assert_eq!(stream.len(), pos + bytes_written);
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write_signed_leb128(&mut stream, x);
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}
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let mut pos = 0;
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for &x in &values {
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@ -23,6 +23,7 @@ Core encoding and decoding interfaces.
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#![feature(box_syntax)]
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#![feature(core_intrinsics)]
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#![feature(specialization)]
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#![feature(never_type)]
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#![cfg_attr(test, feature(test))]
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pub use self::serialize::{Decoder, Encoder, Decodable, Encodable};
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@ -10,50 +10,48 @@
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use leb128::{self, read_signed_leb128, write_signed_leb128};
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use std::borrow::Cow;
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use std::io::{self, Write};
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use serialize;
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// -----------------------------------------------------------------------------
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// Encoder
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// -----------------------------------------------------------------------------
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|
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pub type EncodeResult = io::Result<()>;
|
||||
pub type EncodeResult = Result<(), !>;
|
||||
|
||||
pub struct Encoder<'a> {
|
||||
pub cursor: &'a mut io::Cursor<Vec<u8>>,
|
||||
pub struct Encoder {
|
||||
pub data: Vec<u8>,
|
||||
}
|
||||
|
||||
impl<'a> Encoder<'a> {
|
||||
pub fn new(cursor: &'a mut io::Cursor<Vec<u8>>) -> Encoder<'a> {
|
||||
Encoder { cursor: cursor }
|
||||
impl Encoder {
|
||||
pub fn new(data: Vec<u8>) -> Encoder {
|
||||
Encoder { data }
|
||||
}
|
||||
|
||||
pub fn emit_raw_bytes(&mut self, s: &[u8]) -> EncodeResult {
|
||||
self.cursor.write_all(s)
|
||||
pub fn into_inner(self) -> Vec<u8> {
|
||||
self.data
|
||||
}
|
||||
|
||||
pub fn emit_raw_bytes(&mut self, s: &[u8]) {
|
||||
self.data.extend_from_slice(s);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
macro_rules! write_uleb128 {
|
||||
($enc:expr, $value:expr, $fun:ident) => {{
|
||||
let pos = $enc.cursor.position() as usize;
|
||||
let bytes_written = leb128::$fun($enc.cursor.get_mut(), pos, $value);
|
||||
$enc.cursor.set_position((pos + bytes_written) as u64);
|
||||
leb128::$fun(&mut $enc.data, $value);
|
||||
Ok(())
|
||||
}}
|
||||
}
|
||||
|
||||
macro_rules! write_sleb128 {
|
||||
($enc:expr, $value:expr) => {{
|
||||
let pos = $enc.cursor.position() as usize;
|
||||
let bytes_written = write_signed_leb128($enc.cursor.get_mut(), pos, $value as i128);
|
||||
$enc.cursor.set_position((pos + bytes_written) as u64);
|
||||
write_signed_leb128(&mut $enc.data, $value as i128);
|
||||
Ok(())
|
||||
}}
|
||||
}
|
||||
|
||||
impl<'a> serialize::Encoder for Encoder<'a> {
|
||||
type Error = io::Error;
|
||||
impl serialize::Encoder for Encoder {
|
||||
type Error = !;
|
||||
|
||||
#[inline]
|
||||
fn emit_nil(&mut self) -> EncodeResult {
|
||||
|
|
@ -87,9 +85,7 @@ impl<'a> serialize::Encoder for Encoder<'a> {
|
|||
|
||||
#[inline]
|
||||
fn emit_u8(&mut self, v: u8) -> EncodeResult {
|
||||
let pos = self.cursor.position() as usize;
|
||||
leb128::write_to_vec(self.cursor.get_mut(), pos, v);
|
||||
self.cursor.set_position((pos + 1) as u64);
|
||||
self.data.push(v);
|
||||
Ok(())
|
||||
}
|
||||
|
||||
|
|
@ -153,15 +149,15 @@ impl<'a> serialize::Encoder for Encoder<'a> {
|
|||
#[inline]
|
||||
fn emit_str(&mut self, v: &str) -> EncodeResult {
|
||||
self.emit_usize(v.len())?;
|
||||
let _ = self.cursor.write_all(v.as_bytes());
|
||||
self.emit_raw_bytes(v.as_bytes());
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a> Encoder<'a> {
|
||||
impl Encoder {
|
||||
#[inline]
|
||||
pub fn position(&self) -> usize {
|
||||
self.cursor.position() as usize
|
||||
self.data.len()
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -339,7 +335,6 @@ impl<'a> serialize::Decoder for Decoder<'a> {
|
|||
#[cfg(test)]
|
||||
mod tests {
|
||||
use serialize::{Encodable, Decodable};
|
||||
use std::io::Cursor;
|
||||
use std::fmt::Debug;
|
||||
use super::{Encoder, Decoder};
|
||||
|
||||
|
|
@ -368,14 +363,13 @@ mod tests {
|
|||
|
||||
|
||||
fn check_round_trip<T: Encodable + Decodable + PartialEq + Debug>(values: Vec<T>) {
|
||||
let mut cursor = Cursor::new(Vec::new());
|
||||
let mut encoder = Encoder::new(Vec::new());
|
||||
|
||||
for value in &values {
|
||||
let mut encoder = Encoder::new(&mut cursor);
|
||||
Encodable::encode(&value, &mut encoder).unwrap();
|
||||
}
|
||||
|
||||
let data = cursor.into_inner();
|
||||
let data = encoder.into_inner();
|
||||
let mut decoder = Decoder::new(&data[..], 0);
|
||||
|
||||
for value in values {
|
||||
|
|
|
|||
|
|
@ -41,17 +41,16 @@ enum WireProtocol {
|
|||
fn encode_json<T: Encodable>(val: &T, wr: &mut Cursor<Vec<u8>>) {
|
||||
write!(wr, "{}", json::as_json(val));
|
||||
}
|
||||
fn encode_opaque<T: Encodable>(val: &T, wr: &mut Cursor<Vec<u8>>) {
|
||||
fn encode_opaque<T: Encodable>(val: &T, wr: Vec<u8>) {
|
||||
let mut encoder = opaque::Encoder::new(wr);
|
||||
val.encode(&mut encoder);
|
||||
}
|
||||
|
||||
pub fn main() {
|
||||
let target = Foo{baz: false,};
|
||||
let mut wr = Cursor::new(Vec::new());
|
||||
let proto = WireProtocol::JSON;
|
||||
match proto {
|
||||
WireProtocol::JSON => encode_json(&target, &mut wr),
|
||||
WireProtocol::Opaque => encode_opaque(&target, &mut wr)
|
||||
WireProtocol::JSON => encode_json(&target, &mut Cursor::new(Vec::new())),
|
||||
WireProtocol::Opaque => encode_opaque(&target, Vec::new())
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue