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Remove hokey-hashes from metadata indexes.

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This commit is contained in:
Graydon Hoare 2012-09-19 13:13:24 -07:00
parent c6ed447221
commit bac89eae48
3 changed files with 10 additions and 18 deletions
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11
src/rustc/metadata/common.rs
View File

@ -123,16 +123,5 @@ enum astencode_tag { // Reserves 0x50 -- 0x6f
tag_table_adjustments = 0x62
}
// djb's cdb hashes.
fn hash_node_id(&&node_id: int) -> uint {
return 177573u ^ (node_id as uint);
}
fn hash_path(&&s: ~str) -> uint {
let mut h = 5381u;
for str::each(s) |ch| { h = (h << 5u) + h ^ (ch as uint); }
return h;
}
type link_meta = {name: ~str, vers: ~str, extras_hash: ~str};

4
src/rustc/metadata/decoder.rs
View File

@ -16,7 +16,7 @@ use util::ppaux::ty_to_str;
use syntax::diagnostic::span_handler;
use common::*;
use syntax::parse::token::ident_interner;
use hash::{Hash, HashUtil};
export class_dtor;
export get_class_fields;
@ -88,7 +88,7 @@ fn maybe_find_item(item_id: int, items: ebml::Doc) -> Option<ebml::Doc> {
}
lookup_hash(items,
|a| eq_item(a, item_id),
hash_node_id(item_id))
item_id.hash() as uint)
}
fn find_item(item_id: int, items: ebml::Doc) -> ebml::Doc {

13
src/rustc/metadata/encoder.rs
View File

@ -20,6 +20,9 @@ use str::to_bytes;
use syntax::ast;
use syntax::diagnostic::span_handler;
use hash::{Hash, HashUtil};
use to_bytes::IterBytes;
export encode_parms;
export encode_metadata;
export encoded_ty;
@ -679,7 +682,7 @@ fn encode_info_for_item(ecx: @encode_ctxt, ebml_w: ebml::Writer, item: @item,
}
}
/* Each class has its own index -- encode it */
let bkts = create_index(idx, hash_node_id);
let bkts = create_index(idx);
encode_index(ebml_w, bkts, write_int);
ebml_w.end_tag();
@ -865,13 +868,13 @@ fn encode_info_for_items(ecx: @encode_ctxt, ebml_w: ebml::Writer,
// Path and definition ID indexing
fn create_index<T: Copy>(index: ~[entry<T>], hash_fn: fn@(T) -> uint) ->
fn create_index<T: Copy Hash IterBytes>(index: ~[entry<T>]) ->
~[@~[entry<T>]] {
let mut buckets: ~[@mut ~[entry<T>]] = ~[];
for uint::range(0u, 256u) |_i| { vec::push(buckets, @mut ~[]); };
for index.each |elt| {
let h = hash_fn(elt.val);
vec::push(*buckets[h % 256u], elt);
let h = elt.val.hash() as uint;
vec::push(*buckets[h % 256], elt);
}
let mut buckets_frozen = ~[];
@ -1135,7 +1138,7 @@ fn encode_metadata(parms: encode_parms, crate: @crate) -> ~[u8] {
ecx.stats.item_bytes = wr.pos - i;
i = wr.pos;
let items_buckets = create_index(items_index, hash_node_id);
let items_buckets = create_index(items_index);
encode_index(ebml_w, items_buckets, write_int);
ecx.stats.index_bytes = wr.pos - i;
ebml_w.end_tag();