compat.py - mozsearch

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# -*- coding: utf-8 -*-

# Copyright JS Foundation and other contributors, https://js.foundation/

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# modification, are permitted provided that the following conditions are met:

#   * Redistributions of source code must retain the above copyright

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#   * Redistributions in binary form must reproduce the above copyright

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#     documentation and/or other materials provided with the distribution.

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

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# ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY

# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

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from __future__ import absolute_import, unicode_literals

import sys

PY3 = sys.version_info >= (3, 0)

if PY3:

    # Python 3:

    basestring = str

    long = int

    xrange = range

    unicode = str

    uchr = chr

    def uord(ch):

        return ord(ch[0])

else:

    basestring = basestring

    long = long

    xrange = xrange

    unicode = unicode

    try:

        # Python 2 UCS4:

        unichr(0x10000)

        uchr = unichr

        def uord(ch):

            return ord(ch[0])

    except ValueError:

        # Python 2 UCS2:

        def uchr(code):

            # UTF-16 Encoding

            if code <= 0xFFFF:

                return unichr(code)

            cu1 = ((code - 0x10000) >> 10) + 0xD800

            cu2 = ((code - 0x10000) & 1023) + 0xDC00

            return unichr(cu1) + unichr(cu2)

        def uord(ch):

            cp = ord(ch[0])

            if cp >= 0xD800 and cp <= 0xDBFF:

                second = ord(ch[1])

                if second >= 0xDC00 and second <= 0xDFFF:

                    first = cp

                    cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000

            return cp