python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/gettext.py

@@ -0,0 +1,637 @@
+"""Internationalization and localization support.
+
+This module provides internationalization (I18N) and localization (L10N)
+support for your Python programs by providing an interface to the GNU gettext
+message catalog library.
+
+I18N refers to the operation by which a program is made aware of multiple
+languages.  L10N refers to the adaptation of your program, once
+internationalized, to the local language and cultural habits.
+
+"""
+
+# This module represents the integration of work, contributions, feedback, and
+# suggestions from the following people:
+#
+# Martin von Loewis, who wrote the initial implementation of the underlying
+# C-based libintlmodule (later renamed _gettext), along with a skeletal
+# gettext.py implementation.
+#
+# Peter Funk, who wrote fintl.py, a fairly complete wrapper around intlmodule,
+# which also included a pure-Python implementation to read .mo files if
+# intlmodule wasn't available.
+#
+# James Henstridge, who also wrote a gettext.py module, which has some
+# interesting, but currently unsupported experimental features: the notion of
+# a Catalog class and instances, and the ability to add to a catalog file via
+# a Python API.
+#
+# Barry Warsaw integrated these modules, wrote the .install() API and code,
+# and conformed all C and Python code to Python's coding standards.
+#
+# Francois Pinard and Marc-Andre Lemburg also contributed valuably to this
+# module.
+#
+# J. David Ibanez implemented plural forms. Bruno Haible fixed some bugs.
+#
+# TODO:
+# - Lazy loading of .mo files.  Currently the entire catalog is loaded into
+#   memory, but that's probably bad for large translated programs.  Instead,
+#   the lexical sort of original strings in GNU .mo files should be exploited
+#   to do binary searches and lazy initializations.  Or you might want to use
+#   the undocumented double-hash algorithm for .mo files with hash tables, but
+#   you'll need to study the GNU gettext code to do this.
+#
+# - Support Solaris .mo file formats.  Unfortunately, we've been unable to
+#   find this format documented anywhere.
+
+
+import locale, copy, io, os, re, struct, sys
+from errno import ENOENT
+
+
+__all__ = ['NullTranslations', 'GNUTranslations', 'Catalog',
+           'find', 'translation', 'install', 'textdomain', 'bindtextdomain',
+           'bind_textdomain_codeset',
+           'dgettext', 'dngettext', 'gettext', 'lgettext', 'ldgettext',
+           'ldngettext', 'lngettext', 'ngettext',
+           ]
+
+_default_localedir = os.path.join(sys.base_prefix, 'share', 'locale')
+
+# Expression parsing for plural form selection.
+#
+# The gettext library supports a small subset of C syntax.  The only
+# incompatible difference is that integer literals starting with zero are
+# decimal.
+#
+# https://www.gnu.org/software/gettext/manual/gettext.html#Plural-forms
+# http://git.savannah.gnu.org/cgit/gettext.git/tree/gettext-runtime/intl/plural.y
+
+_token_pattern = re.compile(r"""
+        (?P<WHITESPACES>[ \t]+)                    | # spaces and horizontal tabs
+        (?P<NUMBER>[0-9]+\b)                       | # decimal integer
+        (?P<NAME>n\b)                              | # only n is allowed
+        (?P<PARENTHESIS>[()])                      |
+        (?P<OPERATOR>[-*/%+?:]|[><!]=?|==|&&|\|\|) | # !, *, /, %, +, -, <, >,
+                                                     # <=, >=, ==, !=, &&, ||,
+                                                     # ? :
+                                                     # unary and bitwise ops
+                                                     # not allowed
+        (?P<INVALID>\w+|.)                           # invalid token
+    """, re.VERBOSE|re.DOTALL)
+
+def _tokenize(plural):
+    for mo in re.finditer(_token_pattern, plural):
+        kind = mo.lastgroup
+        if kind == 'WHITESPACES':
+            continue
+        value = mo.group(kind)
+        if kind == 'INVALID':
+            raise ValueError('invalid token in plural form: %s' % value)
+        yield value
+    yield ''
+
+def _error(value):
+    if value:
+        return ValueError('unexpected token in plural form: %s' % value)
+    else:
+        return ValueError('unexpected end of plural form')
+
+_binary_ops = (
+    ('||',),
+    ('&&',),
+    ('==', '!='),
+    ('<', '>', '<=', '>='),
+    ('+', '-'),
+    ('*', '/', '%'),
+)
+_binary_ops = {op: i for i, ops in enumerate(_binary_ops, 1) for op in ops}
+_c2py_ops = {'||': 'or', '&&': 'and', '/': '//'}
+
+def _parse(tokens, priority=-1):
+    result = ''
+    nexttok = next(tokens)
+    while nexttok == '!':
+        result += 'not '
+        nexttok = next(tokens)
+
+    if nexttok == '(':
+        sub, nexttok = _parse(tokens)
+        result = '%s(%s)' % (result, sub)
+        if nexttok != ')':
+            raise ValueError('unbalanced parenthesis in plural form')
+    elif nexttok == 'n':
+        result = '%s%s' % (result, nexttok)
+    else:
+        try:
+            value = int(nexttok, 10)
+        except ValueError:
+            raise _error(nexttok) from None
+        result = '%s%d' % (result, value)
+    nexttok = next(tokens)
+
+    j = 100
+    while nexttok in _binary_ops:
+        i = _binary_ops[nexttok]
+        if i < priority:
+            break
+        # Break chained comparisons
+        if i in (3, 4) and j in (3, 4):  # '==', '!=', '<', '>', '<=', '>='
+            result = '(%s)' % result
+        # Replace some C operators by their Python equivalents
+        op = _c2py_ops.get(nexttok, nexttok)
+        right, nexttok = _parse(tokens, i + 1)
+        result = '%s %s %s' % (result, op, right)
+        j = i
+    if j == priority == 4:  # '<', '>', '<=', '>='
+        result = '(%s)' % result
+
+    if nexttok == '?' and priority <= 0:
+        if_true, nexttok = _parse(tokens, 0)
+        if nexttok != ':':
+            raise _error(nexttok)
+        if_false, nexttok = _parse(tokens)
+        result = '%s if %s else %s' % (if_true, result, if_false)
+        if priority == 0:
+            result = '(%s)' % result
+
+    return result, nexttok
+
+def _as_int(n):
+    try:
+        i = round(n)
+    except TypeError:
+        raise TypeError('Plural value must be an integer, got %s' %
+                        (n.__class__.__name__,)) from None
+    return n
+
+def c2py(plural):
+    """Gets a C expression as used in PO files for plural forms and returns a
+    Python function that implements an equivalent expression.
+    """
+
+    if len(plural) > 1000:
+        raise ValueError('plural form expression is too long')
+    try:
+        result, nexttok = _parse(_tokenize(plural))
+        if nexttok:
+            raise _error(nexttok)
+
+        depth = 0
+        for c in result:
+            if c == '(':
+                depth += 1
+                if depth > 20:
+                    # Python compiler limit is about 90.
+                    # The most complex example has 2.
+                    raise ValueError('plural form expression is too complex')
+            elif c == ')':
+                depth -= 1
+
+        ns = {'_as_int': _as_int}
+        exec('''if True:
+            def func(n):
+                if not isinstance(n, int):
+                    n = _as_int(n)
+                return int(%s)
+            ''' % result, ns)
+        return ns['func']
+    except RecursionError:
+        # Recursion error can be raised in _parse() or exec().
+        raise ValueError('plural form expression is too complex')
+
+
+def _expand_lang(loc):
+    loc = locale.normalize(loc)
+    COMPONENT_CODESET   = 1 << 0
+    COMPONENT_TERRITORY = 1 << 1
+    COMPONENT_MODIFIER  = 1 << 2
+    # split up the locale into its base components
+    mask = 0
+    pos = loc.find('@')
+    if pos >= 0:
+        modifier = loc[pos:]
+        loc = loc[:pos]
+        mask |= COMPONENT_MODIFIER
+    else:
+        modifier = ''
+    pos = loc.find('.')
+    if pos >= 0:
+        codeset = loc[pos:]
+        loc = loc[:pos]
+        mask |= COMPONENT_CODESET
+    else:
+        codeset = ''
+    pos = loc.find('_')
+    if pos >= 0:
+        territory = loc[pos:]
+        loc = loc[:pos]
+        mask |= COMPONENT_TERRITORY
+    else:
+        territory = ''
+    language = loc
+    ret = []
+    for i in range(mask+1):
+        if not (i & ~mask):  # if all components for this combo exist ...
+            val = language
+            if i & COMPONENT_TERRITORY: val += territory
+            if i & COMPONENT_CODESET:   val += codeset
+            if i & COMPONENT_MODIFIER:  val += modifier
+            ret.append(val)
+    ret.reverse()
+    return ret
+
+
+
+class NullTranslations:
+    def __init__(self, fp=None):
+        self._info = {}
+        self._charset = None
+        self._output_charset = None
+        self._fallback = None
+        if fp is not None:
+            self._parse(fp)
+
+    def _parse(self, fp):
+        pass
+
+    def add_fallback(self, fallback):
+        if self._fallback:
+            self._fallback.add_fallback(fallback)
+        else:
+            self._fallback = fallback
+
+    def gettext(self, message):
+        if self._fallback:
+            return self._fallback.gettext(message)
+        return message
+
+    def lgettext(self, message):
+        if self._fallback:
+            return self._fallback.lgettext(message)
+        if self._output_charset:
+            return message.encode(self._output_charset)
+        return message.encode(locale.getpreferredencoding())
+
+    def ngettext(self, msgid1, msgid2, n):
+        if self._fallback:
+            return self._fallback.ngettext(msgid1, msgid2, n)
+        if n == 1:
+            return msgid1
+        else:
+            return msgid2
+
+    def lngettext(self, msgid1, msgid2, n):
+        if self._fallback:
+            return self._fallback.lngettext(msgid1, msgid2, n)
+        if n == 1:
+            tmsg = msgid1
+        else:
+            tmsg = msgid2
+        if self._output_charset:
+            return tmsg.encode(self._output_charset)
+        return tmsg.encode(locale.getpreferredencoding())
+
+    def info(self):
+        return self._info
+
+    def charset(self):
+        return self._charset
+
+    def output_charset(self):
+        return self._output_charset
+
+    def set_output_charset(self, charset):
+        self._output_charset = charset
+
+    def install(self, names=None):
+        import builtins
+        builtins.__dict__['_'] = self.gettext
+        if hasattr(names, "__contains__"):
+            if "gettext" in names:
+                builtins.__dict__['gettext'] = builtins.__dict__['_']
+            if "ngettext" in names:
+                builtins.__dict__['ngettext'] = self.ngettext
+            if "lgettext" in names:
+                builtins.__dict__['lgettext'] = self.lgettext
+            if "lngettext" in names:
+                builtins.__dict__['lngettext'] = self.lngettext
+
+
+class GNUTranslations(NullTranslations):
+    # Magic number of .mo files
+    LE_MAGIC = 0x950412de
+    BE_MAGIC = 0xde120495
+
+    # Acceptable .mo versions
+    VERSIONS = (0, 1)
+
+    def _get_versions(self, version):
+        """Returns a tuple of major version, minor version"""
+        return (version >> 16, version & 0xffff)
+
+    def _parse(self, fp):
+        """Override this method to support alternative .mo formats."""
+        unpack = struct.unpack
+        filename = getattr(fp, 'name', '')
+        # Parse the .mo file header, which consists of 5 little endian 32
+        # bit words.
+        self._catalog = catalog = {}
+        self.plural = lambda n: int(n != 1) # germanic plural by default
+        buf = fp.read()
+        buflen = len(buf)
+        # Are we big endian or little endian?
+        magic = unpack('<I', buf[:4])[0]
+        if magic == self.LE_MAGIC:
+            version, msgcount, masteridx, transidx = unpack('<4I', buf[4:20])
+            ii = '<II'
+        elif magic == self.BE_MAGIC:
+            version, msgcount, masteridx, transidx = unpack('>4I', buf[4:20])
+            ii = '>II'
+        else:
+            raise OSError(0, 'Bad magic number', filename)
+
+        major_version, minor_version = self._get_versions(version)
+
+        if major_version not in self.VERSIONS:
+            raise OSError(0, 'Bad version number ' + str(major_version), filename)
+
+        # Now put all messages from the .mo file buffer into the catalog
+        # dictionary.
+        for i in range(0, msgcount):
+            mlen, moff = unpack(ii, buf[masteridx:masteridx+8])
+            mend = moff + mlen
+            tlen, toff = unpack(ii, buf[transidx:transidx+8])
+            tend = toff + tlen
+            if mend < buflen and tend < buflen:
+                msg = buf[moff:mend]
+                tmsg = buf[toff:tend]
+            else:
+                raise OSError(0, 'File is corrupt', filename)
+            # See if we're looking at GNU .mo conventions for metadata
+            if mlen == 0:
+                # Catalog description
+                lastk = None
+                for b_item in tmsg.split(b'\n'):
+                    item = b_item.decode().strip()
+                    if not item:
+                        continue
+                    k = v = None
+                    if ':' in item:
+                        k, v = item.split(':', 1)
+                        k = k.strip().lower()
+                        v = v.strip()
+                        self._info[k] = v
+                        lastk = k
+                    elif lastk:
+                        self._info[lastk] += '\n' + item
+                    if k == 'content-type':
+                        self._charset = v.split('charset=')[1]
+                    elif k == 'plural-forms':
+                        v = v.split(';')
+                        plural = v[1].split('plural=')[1]
+                        self.plural = c2py(plural)
+            # Note: we unconditionally convert both msgids and msgstrs to
+            # Unicode using the character encoding specified in the charset
+            # parameter of the Content-Type header.  The gettext documentation
+            # strongly encourages msgids to be us-ascii, but some applications
+            # require alternative encodings (e.g. Zope's ZCML and ZPT).  For
+            # traditional gettext applications, the msgid conversion will
+            # cause no problems since us-ascii should always be a subset of
+            # the charset encoding.  We may want to fall back to 8-bit msgids
+            # if the Unicode conversion fails.
+            charset = self._charset or 'ascii'
+            if b'\x00' in msg:
+                # Plural forms
+                msgid1, msgid2 = msg.split(b'\x00')
+                tmsg = tmsg.split(b'\x00')
+                msgid1 = str(msgid1, charset)
+                for i, x in enumerate(tmsg):
+                    catalog[(msgid1, i)] = str(x, charset)
+            else:
+                catalog[str(msg, charset)] = str(tmsg, charset)
+            # advance to next entry in the seek tables
+            masteridx += 8
+            transidx += 8
+
+    def lgettext(self, message):
+        missing = object()
+        tmsg = self._catalog.get(message, missing)
+        if tmsg is missing:
+            if self._fallback:
+                return self._fallback.lgettext(message)
+            tmsg = message
+        if self._output_charset:
+            return tmsg.encode(self._output_charset)
+        return tmsg.encode(locale.getpreferredencoding())
+
+    def lngettext(self, msgid1, msgid2, n):
+        try:
+            tmsg = self._catalog[(msgid1, self.plural(n))]
+        except KeyError:
+            if self._fallback:
+                return self._fallback.lngettext(msgid1, msgid2, n)
+            if n == 1:
+                tmsg = msgid1
+            else:
+                tmsg = msgid2
+        if self._output_charset:
+            return tmsg.encode(self._output_charset)
+        return tmsg.encode(locale.getpreferredencoding())
+
+    def gettext(self, message):
+        missing = object()
+        tmsg = self._catalog.get(message, missing)
+        if tmsg is missing:
+            if self._fallback:
+                return self._fallback.gettext(message)
+            return message
+        return tmsg
+
+    def ngettext(self, msgid1, msgid2, n):
+        try:
+            tmsg = self._catalog[(msgid1, self.plural(n))]
+        except KeyError:
+            if self._fallback:
+                return self._fallback.ngettext(msgid1, msgid2, n)
+            if n == 1:
+                tmsg = msgid1
+            else:
+                tmsg = msgid2
+        return tmsg
+
+
+# Locate a .mo file using the gettext strategy
+def find(domain, localedir=None, languages=None, all=False):
+    # Get some reasonable defaults for arguments that were not supplied
+    if localedir is None:
+        localedir = _default_localedir
+    if languages is None:
+        languages = []
+        for envar in ('LANGUAGE', 'LC_ALL', 'LC_MESSAGES', 'LANG'):
+            val = os.environ.get(envar)
+            if val:
+                languages = val.split(':')
+                break
+        if 'C' not in languages:
+            languages.append('C')
+    # now normalize and expand the languages
+    nelangs = []
+    for lang in languages:
+        for nelang in _expand_lang(lang):
+            if nelang not in nelangs:
+                nelangs.append(nelang)
+    # select a language
+    if all:
+        result = []
+    else:
+        result = None
+    for lang in nelangs:
+        if lang == 'C':
+            break
+        mofile = os.path.join(localedir, lang, 'LC_MESSAGES', '%s.mo' % domain)
+        if os.path.exists(mofile):
+            if all:
+                result.append(mofile)
+            else:
+                return mofile
+    return result
+
+
+
+# a mapping between absolute .mo file path and Translation object
+_translations = {}
+
+def translation(domain, localedir=None, languages=None,
+                class_=None, fallback=False, codeset=None):
+    if class_ is None:
+        class_ = GNUTranslations
+    mofiles = find(domain, localedir, languages, all=True)
+    if not mofiles:
+        if fallback:
+            return NullTranslations()
+        raise OSError(ENOENT, 'No translation file found for domain', domain)
+    # Avoid opening, reading, and parsing the .mo file after it's been done
+    # once.
+    result = None
+    for mofile in mofiles:
+        key = (class_, os.path.abspath(mofile))
+        t = _translations.get(key)
+        if t is None:
+            with open(mofile, 'rb') as fp:
+                t = _translations.setdefault(key, class_(fp))
+        # Copy the translation object to allow setting fallbacks and
+        # output charset. All other instance data is shared with the
+        # cached object.
+        t = copy.copy(t)
+        if codeset:
+            t.set_output_charset(codeset)
+        if result is None:
+            result = t
+        else:
+            result.add_fallback(t)
+    return result
+
+
+def install(domain, localedir=None, codeset=None, names=None):
+    t = translation(domain, localedir, fallback=True, codeset=codeset)
+    t.install(names)
+
+
+
+# a mapping b/w domains and locale directories
+_localedirs = {}
+# a mapping b/w domains and codesets
+_localecodesets = {}
+# current global domain, `messages' used for compatibility w/ GNU gettext
+_current_domain = 'messages'
+
+
+def textdomain(domain=None):
+    global _current_domain
+    if domain is not None:
+        _current_domain = domain
+    return _current_domain
+
+
+def bindtextdomain(domain, localedir=None):
+    global _localedirs
+    if localedir is not None:
+        _localedirs[domain] = localedir
+    return _localedirs.get(domain, _default_localedir)
+
+
+def bind_textdomain_codeset(domain, codeset=None):
+    global _localecodesets
+    if codeset is not None:
+        _localecodesets[domain] = codeset
+    return _localecodesets.get(domain)
+
+
+def dgettext(domain, message):
+    try:
+        t = translation(domain, _localedirs.get(domain, None),
+                        codeset=_localecodesets.get(domain))
+    except OSError:
+        return message
+    return t.gettext(message)
+
+def ldgettext(domain, message):
+    codeset = _localecodesets.get(domain)
+    try:
+        t = translation(domain, _localedirs.get(domain, None), codeset=codeset)
+    except OSError:
+        return message.encode(codeset or locale.getpreferredencoding())
+    return t.lgettext(message)
+
+def dngettext(domain, msgid1, msgid2, n):
+    try:
+        t = translation(domain, _localedirs.get(domain, None),
+                        codeset=_localecodesets.get(domain))
+    except OSError:
+        if n == 1:
+            return msgid1
+        else:
+            return msgid2
+    return t.ngettext(msgid1, msgid2, n)
+
+def ldngettext(domain, msgid1, msgid2, n):
+    codeset = _localecodesets.get(domain)
+    try:
+        t = translation(domain, _localedirs.get(domain, None), codeset=codeset)
+    except OSError:
+        if n == 1:
+            tmsg = msgid1
+        else:
+            tmsg = msgid2
+        return tmsg.encode(codeset or locale.getpreferredencoding())
+    return t.lngettext(msgid1, msgid2, n)
+
+def gettext(message):
+    return dgettext(_current_domain, message)
+
+def lgettext(message):
+    return ldgettext(_current_domain, message)
+
+def ngettext(msgid1, msgid2, n):
+    return dngettext(_current_domain, msgid1, msgid2, n)
+
+def lngettext(msgid1, msgid2, n):
+    return ldngettext(_current_domain, msgid1, msgid2, n)
+
+# dcgettext() has been deemed unnecessary and is not implemented.
+
+# James Henstridge's Catalog constructor from GNOME gettext.  Documented usage
+# was:
+#
+#    import gettext
+#    cat = gettext.Catalog(PACKAGE, localedir=LOCALEDIR)
+#    _ = cat.gettext
+#    print _('Hello World')
+
+# The resulting catalog object currently don't support access through a
+# dictionary API, which was supported (but apparently unused) in GNOME
+# gettext.
+
+Catalog = translation