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Shorten symbols by truncating the hash. #11247

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Merged
merged 1 commit into from
Jan 1, 2014
Merged

Shorten symbols by truncating the hash. #11247

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7 changes: 5 additions & 2 deletions src/librustc/back/link.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ use std::run;
use std::str;
use std::io;
use std::io::fs;
use extra::hex::ToHex;
use extra::tempfile::TempDir;
use syntax::abi;
use syntax::ast;
Expand Down Expand Up @@ -494,8 +495,10 @@ pub fn build_link_meta(sess: Session,
}
}

pub fn truncated_hash_result(symbol_hasher: &mut Sha256) -> ~str {
symbol_hasher.result_str()
fn truncated_hash_result(symbol_hasher: &mut Sha256) -> ~str {
let output = symbol_hasher.result_bytes();
// 64 bits should be enough to avoid collisions.
output.slice_to(8).to_hex()
}


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