Primer commit del proyecto RSS

venv/lib/python3.12/site-packages/feedparser/sgml.py

@@ -0,0 +1,98 @@
+# Copyright 2010-2023 Kurt McKee <contactme@kurtmckee.org>
+# Copyright 2002-2008 Mark Pilgrim
+# All rights reserved.
+#
+# This file is a part of feedparser.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice,
+#   this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+import re
+
+import sgmllib
+
+__all__ = [
+    'sgmllib',
+    'charref',
+    'tagfind',
+    'attrfind',
+    'entityref',
+    'incomplete',
+    'interesting',
+    'shorttag',
+    'shorttagopen',
+    'starttagopen',
+    'endbracket',
+]
+
+# sgmllib defines a number of module-level regular expressions that are
+# insufficient for the XML parsing feedparser needs. Rather than modify
+# the variables directly in sgmllib, they're defined here using the same
+# names, and the compiled code objects of several sgmllib.SGMLParser
+# methods are copied into _BaseHTMLProcessor so that they execute in
+# feedparser's scope instead of sgmllib's scope.
+charref = re.compile(r'&#(\d+|[xX][0-9a-fA-F]+);')
+tagfind = re.compile(r'[a-zA-Z][-_.:a-zA-Z0-9]*')
+attrfind = re.compile(
+    r"""\s*([a-zA-Z_][-:.a-zA-Z_0-9]*)[$]?(\s*=\s*"""
+    r"""('[^']*'|"[^"]*"|[][\-a-zA-Z0-9./,:;+*%?!&$()_#=~'"@]*))?"""
+)
+
+# Unfortunately, these must be copied over to prevent NameError exceptions
+entityref = sgmllib.entityref
+incomplete = sgmllib.incomplete
+interesting = sgmllib.interesting
+shorttag = sgmllib.shorttag
+shorttagopen = sgmllib.shorttagopen
+starttagopen = sgmllib.starttagopen
+
+
+class _EndBracketRegEx:
+    def __init__(self):
+        # Overriding the built-in sgmllib.endbracket regex allows the
+        # parser to find angle brackets embedded in element attributes.
+        self.endbracket = re.compile(
+            r'('
+            r"""[^'"<>]"""
+            r"""|"[^"]*"(?=>|/|\s|\w+=)"""
+            r"""|'[^']*'(?=>|/|\s|\w+=))*(?=[<>])"""
+            r"""|.*?(?=[<>]"""
+            r')'
+        )
+
+    def search(self, target, index=0):
+        match = self.endbracket.match(target, index)
+        if match is not None:
+            # Returning a new object in the calling thread's context
+            # resolves a thread-safety.
+            return EndBracketMatch(match)
+        return None
+
+
+class EndBracketMatch:
+    def __init__(self, match):
+        self.match = match
+
+    def start(self, n):
+        return self.match.end(n)
+
+
+endbracket = _EndBracketRegEx()