mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-18 16:53:38 +00:00
103 lines
3 KiB
Python
103 lines
3 KiB
Python
# -*- coding: utf-8 -*-
|
|
# vi:tabstop=4:expandtab:sw=4
|
|
"""Transliterate Unicode text into plain 7-bit ASCII.
|
|
|
|
Example usage:
|
|
>>> from unidecode import unidecode
|
|
>>> unidecode(u"\u5317\u4EB0")
|
|
"Bei Jing "
|
|
|
|
The transliteration uses a straightforward map, and doesn't have alternatives
|
|
for the same character based on language, position, or anything else.
|
|
|
|
In Python 3, a standard string object will be returned. If you need bytes, use:
|
|
>>> unidecode("Κνωσός").encode("ascii")
|
|
b'Knosos'
|
|
"""
|
|
import warnings
|
|
from sys import version_info
|
|
|
|
Cache = {}
|
|
|
|
|
|
def _warn_if_not_unicode(string):
|
|
if version_info[0] < 3 and not isinstance(string, unicode):
|
|
warnings.warn( "Argument %r is not an unicode object. "
|
|
"Passing an encoded string will likely have "
|
|
"unexpected results." % (type(string),),
|
|
RuntimeWarning, 2)
|
|
|
|
|
|
def unidecode_expect_ascii(string):
|
|
"""Transliterate an Unicode object into an ASCII string
|
|
|
|
>>> unidecode(u"\u5317\u4EB0")
|
|
"Bei Jing "
|
|
|
|
This function first tries to convert the string using ASCII codec.
|
|
If it fails (because of non-ASCII characters), it falls back to
|
|
transliteration using the character tables.
|
|
|
|
This is approx. five times faster if the string only contains ASCII
|
|
characters, but slightly slower than using unidecode directly if non-ASCII
|
|
chars are present.
|
|
"""
|
|
|
|
_warn_if_not_unicode(string)
|
|
try:
|
|
bytestring = string.encode('ASCII')
|
|
except UnicodeEncodeError:
|
|
return _unidecode(string)
|
|
if version_info[0] >= 3:
|
|
return string
|
|
else:
|
|
return bytestring
|
|
|
|
def unidecode_expect_nonascii(string):
|
|
"""Transliterate an Unicode object into an ASCII string
|
|
|
|
>>> unidecode(u"\u5317\u4EB0")
|
|
"Bei Jing "
|
|
"""
|
|
|
|
_warn_if_not_unicode(string)
|
|
return _unidecode(string)
|
|
|
|
unidecode = unidecode_expect_ascii
|
|
|
|
def _unidecode(string):
|
|
retval = []
|
|
|
|
for char in string:
|
|
codepoint = ord(char)
|
|
|
|
if codepoint < 0x80: # Basic ASCII
|
|
retval.append(str(char))
|
|
continue
|
|
|
|
if codepoint > 0xeffff:
|
|
continue # Characters in Private Use Area and above are ignored
|
|
|
|
if 0xd800 <= codepoint <= 0xdfff:
|
|
warnings.warn( "Surrogate character %r will be ignored. "
|
|
"You might be using a narrow Python build." % (char,),
|
|
RuntimeWarning, 2)
|
|
|
|
section = codepoint >> 8 # Chop off the last two hex digits
|
|
position = codepoint % 256 # Last two hex digits
|
|
|
|
try:
|
|
table = Cache[section]
|
|
except KeyError:
|
|
try:
|
|
mod = __import__('unidecode.x%03x'%(section), globals(), locals(), ['data'])
|
|
except ImportError:
|
|
Cache[section] = None
|
|
continue # No match: ignore this character and carry on.
|
|
|
|
Cache[section] = table = mod.data
|
|
|
|
if table and len(table) > position:
|
|
retval.append( table[position] )
|
|
|
|
return ''.join(retval)
|