diff -r 000000000000 -r de9c2efb9d02 ThirdParty/CharDet/chardet/universaldetector.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ThirdParty/CharDet/chardet/universaldetector.py Mon Dec 28 16:03:33 2009 +0000
@@ -0,0 +1,154 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+# Mark Pilgrim - port to Python
+# Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301 USA
+######################### END LICENSE BLOCK #########################
+
+import constants, sys
+from latin1prober import Latin1Prober # windows-1252
+from mbcsgroupprober import MBCSGroupProber # multi-byte character sets
+from sbcsgroupprober import SBCSGroupProber # single-byte character sets
+from escprober import EscCharSetProber # ISO-2122, etc.
+import re
+
+MINIMUM_THRESHOLD = 0.20
+ePureAscii = 0
+eEscAscii = 1
+eHighbyte = 2
+
+class UniversalDetector:
+ def __init__(self):
+ self._highBitDetector = re.compile(r'[\x80-\xFF]')
+ self._escDetector = re.compile(r'(\033|~{)')
+ self._mEscCharSetProber = None
+ self._mCharSetProbers = []
+ self.reset()
+
+ def reset(self):
+ self.result = {'encoding': None, 'confidence': 0.0}
+ self.done = constants.False
+ self._mStart = constants.True
+ self._mGotData = constants.False
+ self._mInputState = ePureAscii
+ self._mLastChar = ''
+ if self._mEscCharSetProber:
+ self._mEscCharSetProber.reset()
+ for prober in self._mCharSetProbers:
+ prober.reset()
+
+ def feed(self, aBuf):
+ if self.done: return
+
+ aLen = len(aBuf)
+ if not aLen: return
+
+ if not self._mGotData:
+ # If the data starts with BOM, we know it is UTF
+ if aBuf[:3] == '\xEF\xBB\xBF':
+ # EF BB BF UTF-8 with BOM
+ self.result = {'encoding': "UTF-8", 'confidence': 1.0}
+ elif aBuf[:4] == '\xFF\xFE\x00\x00':
+ # FF FE 00 00 UTF-32, little-endian BOM
+ self.result = {'encoding': "UTF-32LE", 'confidence': 1.0}
+ elif aBuf[:4] == '\x00\x00\xFE\xFF':
+ # 00 00 FE FF UTF-32, big-endian BOM
+ self.result = {'encoding': "UTF-32BE", 'confidence': 1.0}
+ elif aBuf[:4] == '\xFE\xFF\x00\x00':
+ # FE FF 00 00 UCS-4, unusual octet order BOM (3412)
+ self.result = {'encoding': "X-ISO-10646-UCS-4-3412", 'confidence': 1.0}
+ elif aBuf[:4] == '\x00\x00\xFF\xFE':
+ # 00 00 FF FE UCS-4, unusual octet order BOM (2143)
+ self.result = {'encoding': "X-ISO-10646-UCS-4-2143", 'confidence': 1.0}
+ elif aBuf[:2] == '\xFF\xFE':
+ # FF FE UTF-16, little endian BOM
+ self.result = {'encoding': "UTF-16LE", 'confidence': 1.0}
+ elif aBuf[:2] == '\xFE\xFF':
+ # FE FF UTF-16, big endian BOM
+ self.result = {'encoding': "UTF-16BE", 'confidence': 1.0}
+
+ self._mGotData = constants.True
+ if self.result['encoding'] and (self.result['confidence'] > 0.0):
+ self.done = constants.True
+ return
+
+ if self._mInputState == ePureAscii:
+ if self._highBitDetector.search(aBuf):
+ self._mInputState = eHighbyte
+ elif (self._mInputState == ePureAscii) and self._escDetector.search(self._mLastChar + aBuf):
+ self._mInputState = eEscAscii
+
+ self._mLastChar = aBuf[-1]
+
+ if self._mInputState == eEscAscii:
+ if not self._mEscCharSetProber:
+ self._mEscCharSetProber = EscCharSetProber()
+ if self._mEscCharSetProber.feed(aBuf) == constants.eFoundIt:
+ self.result = {'encoding': self._mEscCharSetProber.get_charset_name(),
+ 'confidence': self._mEscCharSetProber.get_confidence()}
+ self.done = constants.True
+ elif self._mInputState == eHighbyte:
+ if not self._mCharSetProbers:
+ self._mCharSetProbers = [MBCSGroupProber(), SBCSGroupProber(), Latin1Prober()]
+ for prober in self._mCharSetProbers:
+ if prober.feed(aBuf) == constants.eFoundIt:
+ self.result = {'encoding': prober.get_charset_name(),
+ 'confidence': prober.get_confidence()}
+ self.done = constants.True
+ break
+
+ def close(self):
+ if self.done: return
+ if not self._mGotData:
+ if constants._debug:
+ sys.stderr.write('no data received!\n')
+ return
+ self.done = constants.True
+
+ if self._mInputState == ePureAscii:
+ self.result = {'encoding': 'ascii', 'confidence': 1.0}
+ return self.result
+
+ if self._mInputState == eHighbyte:
+ proberConfidence = None
+ maxProberConfidence = 0.0
+ maxProber = None
+ for prober in self._mCharSetProbers:
+ if not prober: continue
+ proberConfidence = prober.get_confidence()
+ if proberConfidence > maxProberConfidence:
+ maxProberConfidence = proberConfidence
+ maxProber = prober
+ if maxProber and (maxProberConfidence > MINIMUM_THRESHOLD):
+ self.result = {'encoding': maxProber.get_charset_name(),
+ 'confidence': maxProber.get_confidence()}
+ return self.result
+
+ if constants._debug:
+ sys.stderr.write('no probers hit minimum threshhold\n')
+ for prober in self._mCharSetProbers[0].mProbers:
+ if not prober: continue
+ sys.stderr.write('%s confidence = %s\n' % \
+ (prober.get_charset_name(), \
+ prober.get_confidence()))
