def feed()

in lambda/source/bastion/requests/packages/chardet/universaldetector.py [0:0]

• 55 lines of code
• 24 McCabe index (conditional complexity)

    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] == codecs.BOM_UTF8:
                # EF BB BF  UTF-8 with BOM
                self.result = {'encoding': "UTF-8-SIG", 'confidence': 1.0}
            elif aBuf[:4] == codecs.BOM_UTF32_LE:
                # FF FE 00 00  UTF-32, little-endian BOM
                self.result = {'encoding': "UTF-32LE", 'confidence': 1.0}
            elif aBuf[:4] == codecs.BOM_UTF32_BE:
                # 00 00 FE FF  UTF-32, big-endian BOM
                self.result = {'encoding': "UTF-32BE", 'confidence': 1.0}
            elif aBuf[:4] == b'\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] == b'\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] == codecs.BOM_LE:
                # FF FE  UTF-16, little endian BOM
                self.result = {'encoding': "UTF-16LE", 'confidence': 1.0}
            elif aBuf[:2] == codecs.BOM_BE:
                # FE FF  UTF-16, big endian BOM
                self.result = {'encoding': "UTF-16BE", 'confidence': 1.0}

        self._mGotData = True
        if self.result['encoding'] and (self.result['confidence'] > 0.0):
            self.done = 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 = 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 = True
                    break