--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/sgmllib.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,553 @@
+"""A parser for SGML, using the derived class as a static DTD."""
+
+# XXX This only supports those SGML features used by HTML.
+
+# XXX There should be a way to distinguish between PCDATA (parsed
+# character data -- the normal case), RCDATA (replaceable character
+# data -- only char and entity references and end tags are special)
+# and CDATA (character data -- only end tags are special). RCDATA is
+# not supported at all.
+
+
+from warnings import warnpy3k
+warnpy3k("the sgmllib module has been removed in Python 3.0",
+ stacklevel=2)
+del warnpy3k
+
+import markupbase
+import re
+
+__all__ = ["SGMLParser", "SGMLParseError"]
+
+# Regular expressions used for parsing
+
+interesting = re.compile('[&<]')
+incomplete = re.compile('&([a-zA-Z][a-zA-Z0-9]*|#[0-9]*)?|'
+ '<([a-zA-Z][^<>]*|'
+ '/([a-zA-Z][^<>]*)?|'
+ '![^<>]*)?')
+
+entityref = re.compile('&([a-zA-Z][-.a-zA-Z0-9]*)[^a-zA-Z0-9]')
+charref = re.compile('&#([0-9]+)[^0-9]')
+
+starttagopen = re.compile('<[>a-zA-Z]')
+shorttagopen = re.compile('<[a-zA-Z][-.a-zA-Z0-9]*/')
+shorttag = re.compile('<([a-zA-Z][-.a-zA-Z0-9]*)/([^/]*)/')
+piclose = re.compile('>')
+endbracket = re.compile('[<>]')
+tagfind = re.compile('[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./,:;+*%?!&$\(\)_#=~\'"@]*))?')
+
+
+class SGMLParseError(RuntimeError):
+ """Exception raised for all parse errors."""
+ pass
+
+
+# SGML parser base class -- find tags and call handler functions.
+# Usage: p = SGMLParser(); p.feed(data); ...; p.close().
+# The dtd is defined by deriving a class which defines methods
+# with special names to handle tags: start_foo and end_foo to handle
+# <foo> and </foo>, respectively, or do_foo to handle <foo> by itself.
+# (Tags are converted to lower case for this purpose.) The data
+# between tags is passed to the parser by calling self.handle_data()
+# with some data as argument (the data may be split up in arbitrary
+# chunks). Entity references are passed by calling
+# self.handle_entityref() with the entity reference as argument.
+
+class SGMLParser(markupbase.ParserBase):
+ # Definition of entities -- derived classes may override
+ entity_or_charref = re.compile('&(?:'
+ '([a-zA-Z][-.a-zA-Z0-9]*)|#([0-9]+)'
+ ')(;?)')
+
+ def __init__(self, verbose=0):
+ """Initialize and reset this instance."""
+ self.verbose = verbose
+ self.reset()
+
+ def reset(self):
+ """Reset this instance. Loses all unprocessed data."""
+ self.__starttag_text = None
+ self.rawdata = ''
+ self.stack = []
+ self.lasttag = '???'
+ self.nomoretags = 0
+ self.literal = 0
+ markupbase.ParserBase.reset(self)
+
+ def setnomoretags(self):
+ """Enter literal mode (CDATA) till EOF.
+
+ Intended for derived classes only.
+ """
+ self.nomoretags = self.literal = 1
+
+ def setliteral(self, *args):
+ """Enter literal mode (CDATA).
+
+ Intended for derived classes only.
+ """
+ self.literal = 1
+
+ def feed(self, data):
+ """Feed some data to the parser.
+
+ Call this as often as you want, with as little or as much text
+ as you want (may include '\n'). (This just saves the text,
+ all the processing is done by goahead().)
+ """
+
+ self.rawdata = self.rawdata + data
+ self.goahead(0)
+
+ def close(self):
+ """Handle the remaining data."""
+ self.goahead(1)
+
+ def error(self, message):
+ raise SGMLParseError(message)
+
+ # Internal -- handle data as far as reasonable. May leave state
+ # and data to be processed by a subsequent call. If 'end' is
+ # true, force handling all data as if followed by EOF marker.
+ def goahead(self, end):
+ rawdata = self.rawdata
+ i = 0
+ n = len(rawdata)
+ while i < n:
+ if self.nomoretags:
+ self.handle_data(rawdata[i:n])
+ i = n
+ break
+ match = interesting.search(rawdata, i)
+ if match: j = match.start()
+ else: j = n
+ if i < j:
+ self.handle_data(rawdata[i:j])
+ i = j
+ if i == n: break
+ if rawdata[i] == '<':
+ if starttagopen.match(rawdata, i):
+ if self.literal:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ k = self.parse_starttag(i)
+ if k < 0: break
+ i = k
+ continue
+ if rawdata.startswith("</", i):
+ k = self.parse_endtag(i)
+ if k < 0: break
+ i = k
+ self.literal = 0
+ continue
+ if self.literal:
+ if n > (i + 1):
+ self.handle_data("<")
+ i = i+1
+ else:
+ # incomplete
+ break
+ continue
+ if rawdata.startswith("<!--", i):
+ # Strictly speaking, a comment is --.*--
+ # within a declaration tag <!...>.
+ # This should be removed,
+ # and comments handled only in parse_declaration.
+ k = self.parse_comment(i)
+ if k < 0: break
+ i = k
+ continue
+ if rawdata.startswith("<?", i):
+ k = self.parse_pi(i)
+ if k < 0: break
+ i = i+k
+ continue
+ if rawdata.startswith("<!", i):
+ # This is some sort of declaration; in "HTML as
+ # deployed," this should only be the document type
+ # declaration ("<!DOCTYPE html...>").
+ k = self.parse_declaration(i)
+ if k < 0: break
+ i = k
+ continue
+ elif rawdata[i] == '&':
+ if self.literal:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ match = charref.match(rawdata, i)
+ if match:
+ name = match.group(1)
+ self.handle_charref(name)
+ i = match.end(0)
+ if rawdata[i-1] != ';': i = i-1
+ continue
+ match = entityref.match(rawdata, i)
+ if match:
+ name = match.group(1)
+ self.handle_entityref(name)
+ i = match.end(0)
+ if rawdata[i-1] != ';': i = i-1
+ continue
+ else:
+ self.error('neither < nor & ??')
+ # We get here only if incomplete matches but
+ # nothing else
+ match = incomplete.match(rawdata, i)
+ if not match:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ j = match.end(0)
+ if j == n:
+ break # Really incomplete
+ self.handle_data(rawdata[i:j])
+ i = j
+ # end while
+ if end and i < n:
+ self.handle_data(rawdata[i:n])
+ i = n
+ self.rawdata = rawdata[i:]
+ # XXX if end: check for empty stack
+
+ # Extensions for the DOCTYPE scanner:
+ _decl_otherchars = '='
+
+ # Internal -- parse processing instr, return length or -1 if not terminated
+ def parse_pi(self, i):
+ rawdata = self.rawdata
+ if rawdata[i:i+2] != '<?':
+ self.error('unexpected call to parse_pi()')
+ match = piclose.search(rawdata, i+2)
+ if not match:
+ return -1
+ j = match.start(0)
+ self.handle_pi(rawdata[i+2: j])
+ j = match.end(0)
+ return j-i
+
+ def get_starttag_text(self):
+ return self.__starttag_text
+
+ # Internal -- handle starttag, return length or -1 if not terminated
+ def parse_starttag(self, i):
+ self.__starttag_text = None
+ start_pos = i
+ rawdata = self.rawdata
+ if shorttagopen.match(rawdata, i):
+ # SGML shorthand: <tag/data/ == <tag>data</tag>
+ # XXX Can data contain &... (entity or char refs)?
+ # XXX Can data contain < or > (tag characters)?
+ # XXX Can there be whitespace before the first /?
+ match = shorttag.match(rawdata, i)
+ if not match:
+ return -1
+ tag, data = match.group(1, 2)
+ self.__starttag_text = '<%s/' % tag
+ tag = tag.lower()
+ k = match.end(0)
+ self.finish_shorttag(tag, data)
+ self.__starttag_text = rawdata[start_pos:match.end(1) + 1]
+ return k
+ # XXX The following should skip matching quotes (' or ")
+ # As a shortcut way to exit, this isn't so bad, but shouldn't
+ # be used to locate the actual end of the start tag since the
+ # < or > characters may be embedded in an attribute value.
+ match = endbracket.search(rawdata, i+1)
+ if not match:
+ return -1
+ j = match.start(0)
+ # Now parse the data between i+1 and j into a tag and attrs
+ attrs = []
+ if rawdata[i:i+2] == '<>':
+ # SGML shorthand: <> == <last open tag seen>
+ k = j
+ tag = self.lasttag
+ else:
+ match = tagfind.match(rawdata, i+1)
+ if not match:
+ self.error('unexpected call to parse_starttag')
+ k = match.end(0)
+ tag = rawdata[i+1:k].lower()
+ self.lasttag = tag
+ while k < j:
+ match = attrfind.match(rawdata, k)
+ if not match: break
+ attrname, rest, attrvalue = match.group(1, 2, 3)
+ if not rest:
+ attrvalue = attrname
+ else:
+ if (attrvalue[:1] == "'" == attrvalue[-1:] or
+ attrvalue[:1] == '"' == attrvalue[-1:]):
+ # strip quotes
+ attrvalue = attrvalue[1:-1]
+ attrvalue = self.entity_or_charref.sub(
+ self._convert_ref, attrvalue)
+ attrs.append((attrname.lower(), attrvalue))
+ k = match.end(0)
+ if rawdata[j] == '>':
+ j = j+1
+ self.__starttag_text = rawdata[start_pos:j]
+ self.finish_starttag(tag, attrs)
+ return j
+
+ # Internal -- convert entity or character reference
+ def _convert_ref(self, match):
+ if match.group(2):
+ return self.convert_charref(match.group(2)) or \
+ '&#%s%s' % match.groups()[1:]
+ elif match.group(3):
+ return self.convert_entityref(match.group(1)) or \
+ '&%s;' % match.group(1)
+ else:
+ return '&%s' % match.group(1)
+
+ # Internal -- parse endtag
+ def parse_endtag(self, i):
+ rawdata = self.rawdata
+ match = endbracket.search(rawdata, i+1)
+ if not match:
+ return -1
+ j = match.start(0)
+ tag = rawdata[i+2:j].strip().lower()
+ if rawdata[j] == '>':
+ j = j+1
+ self.finish_endtag(tag)
+ return j
+
+ # Internal -- finish parsing of <tag/data/ (same as <tag>data</tag>)
+ def finish_shorttag(self, tag, data):
+ self.finish_starttag(tag, [])
+ self.handle_data(data)
+ self.finish_endtag(tag)
+
+ # Internal -- finish processing of start tag
+ # Return -1 for unknown tag, 0 for open-only tag, 1 for balanced tag
+ def finish_starttag(self, tag, attrs):
+ try:
+ method = getattr(self, 'start_' + tag)
+ except AttributeError:
+ try:
+ method = getattr(self, 'do_' + tag)
+ except AttributeError:
+ self.unknown_starttag(tag, attrs)
+ return -1
+ else:
+ self.handle_starttag(tag, method, attrs)
+ return 0
+ else:
+ self.stack.append(tag)
+ self.handle_starttag(tag, method, attrs)
+ return 1
+
+ # Internal -- finish processing of end tag
+ def finish_endtag(self, tag):
+ if not tag:
+ found = len(self.stack) - 1
+ if found < 0:
+ self.unknown_endtag(tag)
+ return
+ else:
+ if tag not in self.stack:
+ try:
+ method = getattr(self, 'end_' + tag)
+ except AttributeError:
+ self.unknown_endtag(tag)
+ else:
+ self.report_unbalanced(tag)
+ return
+ found = len(self.stack)
+ for i in range(found):
+ if self.stack[i] == tag: found = i
+ while len(self.stack) > found:
+ tag = self.stack[-1]
+ try:
+ method = getattr(self, 'end_' + tag)
+ except AttributeError:
+ method = None
+ if method:
+ self.handle_endtag(tag, method)
+ else:
+ self.unknown_endtag(tag)
+ del self.stack[-1]
+
+ # Overridable -- handle start tag
+ def handle_starttag(self, tag, method, attrs):
+ method(attrs)
+
+ # Overridable -- handle end tag
+ def handle_endtag(self, tag, method):
+ method()
+
+ # Example -- report an unbalanced </...> tag.
+ def report_unbalanced(self, tag):
+ if self.verbose:
+ print '*** Unbalanced </' + tag + '>'
+ print '*** Stack:', self.stack
+
+ def convert_charref(self, name):
+ """Convert character reference, may be overridden."""
+ try:
+ n = int(name)
+ except ValueError:
+ return
+ if not 0 <= n <= 255:
+ return
+ return self.convert_codepoint(n)
+
+ def convert_codepoint(self, codepoint):
+ return chr(codepoint)
+
+ def handle_charref(self, name):
+ """Handle character reference, no need to override."""
+ replacement = self.convert_charref(name)
+ if replacement is None:
+ self.unknown_charref(name)
+ else:
+ self.handle_data(replacement)
+
+ # Definition of entities -- derived classes may override
+ entitydefs = \
+ {'lt': '<', 'gt': '>', 'amp': '&', 'quot': '"', 'apos': '\''}
+
+ def convert_entityref(self, name):
+ """Convert entity references.
+
+ As an alternative to overriding this method; one can tailor the
+ results by setting up the self.entitydefs mapping appropriately.
+ """
+ table = self.entitydefs
+ if name in table:
+ return table[name]
+ else:
+ return
+
+ def handle_entityref(self, name):
+ """Handle entity references, no need to override."""
+ replacement = self.convert_entityref(name)
+ if replacement is None:
+ self.unknown_entityref(name)
+ else:
+ self.handle_data(replacement)
+
+ # Example -- handle data, should be overridden
+ def handle_data(self, data):
+ pass
+
+ # Example -- handle comment, could be overridden
+ def handle_comment(self, data):
+ pass
+
+ # Example -- handle declaration, could be overridden
+ def handle_decl(self, decl):
+ pass
+
+ # Example -- handle processing instruction, could be overridden
+ def handle_pi(self, data):
+ pass
+
+ # To be overridden -- handlers for unknown objects
+ def unknown_starttag(self, tag, attrs): pass
+ def unknown_endtag(self, tag): pass
+ def unknown_charref(self, ref): pass
+ def unknown_entityref(self, ref): pass
+
+
+class TestSGMLParser(SGMLParser):
+
+ def __init__(self, verbose=0):
+ self.testdata = ""
+ SGMLParser.__init__(self, verbose)
+
+ def handle_data(self, data):
+ self.testdata = self.testdata + data
+ if len(repr(self.testdata)) >= 70:
+ self.flush()
+
+ def flush(self):
+ data = self.testdata
+ if data:
+ self.testdata = ""
+ print 'data:', repr(data)
+
+ def handle_comment(self, data):
+ self.flush()
+ r = repr(data)
+ if len(r) > 68:
+ r = r[:32] + '...' + r[-32:]
+ print 'comment:', r
+
+ def unknown_starttag(self, tag, attrs):
+ self.flush()
+ if not attrs:
+ print 'start tag: <' + tag + '>'
+ else:
+ print 'start tag: <' + tag,
+ for name, value in attrs:
+ print name + '=' + '"' + value + '"',
+ print '>'
+
+ def unknown_endtag(self, tag):
+ self.flush()
+ print 'end tag: </' + tag + '>'
+
+ def unknown_entityref(self, ref):
+ self.flush()
+ print '*** unknown entity ref: &' + ref + ';'
+
+ def unknown_charref(self, ref):
+ self.flush()
+ print '*** unknown char ref: &#' + ref + ';'
+
+ def unknown_decl(self, data):
+ self.flush()
+ print '*** unknown decl: [' + data + ']'
+
+ def close(self):
+ SGMLParser.close(self)
+ self.flush()
+
+
+def test(args = None):
+ import sys
+
+ if args is None:
+ args = sys.argv[1:]
+
+ if args and args[0] == '-s':
+ args = args[1:]
+ klass = SGMLParser
+ else:
+ klass = TestSGMLParser
+
+ if args:
+ file = args[0]
+ else:
+ file = 'test.html'
+
+ if file == '-':
+ f = sys.stdin
+ else:
+ try:
+ f = open(file, 'r')
+ except IOError, msg:
+ print file, ":", msg
+ sys.exit(1)
+
+ data = f.read()
+ if f is not sys.stdin:
+ f.close()
+
+ x = klass()
+ for c in data:
+ x.feed(c)
+ x.close()
+
+
+if __name__ == '__main__':
+ test()