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  • Committer: Aaron Bentley
  • Date: 2006-04-15 00:17:38 UTC
  • mto: This revision was merged to the branch mainline in revision 1673.
  • Revision ID: aaron.bentley@utoronto.ca-20060415001738-09feeab6b5ee61d1
Add text_file function

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bzrlib/textfile.py
 
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from itertools import chain 
 
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from bzrlib.errors import BinaryFile
 
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from bzrlib.iterablefile import IterableFile
 
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from bzrlib.osutils import file_iterator
 
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def text_file(input):
 
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    """Produce a file iterator that is guaranteed to be text, without seeking.
 
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    BinaryFile is raised if the file contains a NUL in the first 1024 bytes.
 
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    """
 
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    first_chunk = input.read(1024)
 
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    if '\x00' in first_chunk:
 
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        raise BinaryFile()
 
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    return IterableFile(chain((first_chunk,), file_iterator(input)))