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Viewing changes to bzrlib/osutils.py

  • Committer: Martin Pool
  • Date: 2005-05-02 04:41:03 UTC
  • Revision ID: mbp@sourcefrog.net-20050502044102-ecf43538a15f1989
- Compute SHA-1 of files in chunks

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bzrlib/osutils.py
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def sha_file(f):
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    import sha
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    ## TODO: Maybe read in chunks to handle big files
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    if hasattr(f, 'tell'):
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        assert f.tell() == 0
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    s = sha.new()
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    s.update(f.read())
 
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    BUFSIZE = 128<<10
 
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    while True:
 
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        b = f.read(BUFSIZE)
 
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        if not b:
 
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            break
 
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        s.update(b)
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    return s.hexdigest()
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def compare_files(a, b):
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    """Returns true if equal in contents"""
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    # TODO: don't read the whole thing in one go.
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    BUFSIZE = 4096
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    while True:
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        ai = a.read(BUFSIZE)