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'''
====================================================================
Copyright (c) 2005-2010 Barry A Scott. All rights reserved.
This software is licensed as described in the file LICENSE.txt,
which you should have received as part of this distribution.
====================================================================
wb_read_file.py
'''
import locale
import codecs
import wb_platform_specific
def readFileContentsAsUnicode( filename ):
f = wb_platform_specific.uOpen( filename, 'r' )
contents = f.read()
f.close()
return contentsAsUnicode( contents )
def contentsAsUnicode( contents ):
encoding = encodingFromContents( contents )
try:
return contents.decode( encoding )
except UnicodeDecodeError:
try:
# use the choosen encoding and replace chars in error
return contents.decode( encoding, 'replace' )
except UnicodeDecodeError:
# fall back to latin-1
return contents.decode( 'iso8859-1', 'replace' )
def encodingFromContents( contents ):
if( len(contents) > len(codecs.BOM_UTF8)
and contents[0:len(codecs.BOM_UTF8)] == codecs.BOM_UTF8 ):
encoding = 'utf-8'
elif( len(contents) > len(codecs.BOM_UTF16_LE)
and contents[0:len(codecs.BOM_UTF16_LE)] in [codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE]):
encoding = 'utf-16'
elif( len(contents) > len(codecs.BOM_UTF32_LE)
and contents[0:len(codecs.BOM_UTF32_LE)] in [codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE]):
encoding = 'utf-32'
else:
encoding = locale.getdefaultlocale()[1]
# Mac says mac-roman when utf-8 is what is required
if encoding == 'mac-roman':
encoding = 'utf-8'
if encoding is None:
encoding = 'iso8859-1'
return encoding
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