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* Refactoring: move sink/source buffering into separate classes.

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* Buffer the HashSink.  This speeds up hashing a bit because it
  prevents lots of calls to the hash update functions (e.g. nix-hash
  went from 9.3s to 8.7s of user time on the closure of my
  /var/run/current-system).
This commit is contained in:
Eelco Dolstra 2011-12-15 16:19:53 +00:00
parent a67b8ae224
commit 5a1b9ed0aa
8 changed files with 125 additions and 90 deletions
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5
src/libutil/hash.hh
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@ -91,7 +91,7 @@ string printHashType(HashType ht);
union Ctx;
class HashSink : public Sink
class HashSink : public BufferedSink
{
private:
HashType ht;
@ -102,8 +102,9 @@ public:
HashSink(HashType ht);
HashSink(const HashSink & h);
~HashSink();
virtual void operator () (const unsigned char * data, unsigned int len);
void write(const unsigned char * data, size_t len);
HashResult finish();
HashResult currentHash();
};