2011-07-06 03:30:04 +02:00
|
|
|
# Copyright (c) 2006-2011 Nathan Binkert <nate@binkert.org>
|
2009-08-16 22:40:01 +02:00
|
|
|
# All rights reserved.
|
|
|
|
#
|
|
|
|
# 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;
|
|
|
|
# neither the name of the copyright holders nor the names of its
|
|
|
|
# contributors may be used to endorse or promote products derived from
|
|
|
|
# this software without specific prior written permission.
|
|
|
|
#
|
|
|
|
# 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.
|
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
import os
|
2009-08-16 22:40:01 +02:00
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
import ply.lex
|
|
|
|
import ply.yacc
|
2009-08-16 22:40:01 +02:00
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
class ParseError(Exception):
|
2009-08-16 22:40:01 +02:00
|
|
|
def __init__(self, message, token=None):
|
2011-07-06 03:30:04 +02:00
|
|
|
Exception.__init__(self, message)
|
2009-08-16 22:40:01 +02:00
|
|
|
self.token = token
|
|
|
|
|
|
|
|
class Grammar(object):
|
2011-07-06 03:30:04 +02:00
|
|
|
def setupLexerFactory(self, **kwargs):
|
|
|
|
if 'module' in kwargs:
|
|
|
|
raise AttributeError, "module is an illegal attribute"
|
|
|
|
self.lex_kwargs = kwargs
|
2009-08-16 22:40:01 +02:00
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
def setupParserFactory(self, **kwargs):
|
|
|
|
if 'module' in kwargs:
|
|
|
|
raise AttributeError, "module is an illegal attribute"
|
2009-08-16 22:40:01 +02:00
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
if 'output' in kwargs:
|
2009-08-16 22:40:01 +02:00
|
|
|
dir,tab = os.path.split(output)
|
|
|
|
if not tab.endswith('.py'):
|
2011-07-06 03:30:04 +02:00
|
|
|
raise AttributeError, \
|
|
|
|
'The output file must end with .py'
|
|
|
|
kwargs['outputdir'] = dir
|
|
|
|
kwargs['tabmodule'] = tab[:-3]
|
2009-08-16 22:40:01 +02:00
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
self.yacc_kwargs = kwargs
|
|
|
|
|
|
|
|
def __getattr__(self, attr):
|
|
|
|
if attr == 'lexers':
|
|
|
|
self.lexers = []
|
|
|
|
return self.lexers
|
|
|
|
|
|
|
|
if attr == 'lex_kwargs':
|
|
|
|
self.setupLexerFactory()
|
|
|
|
return self.lex_kwargs
|
|
|
|
|
|
|
|
if attr == 'yacc_kwargs':
|
|
|
|
self.setupParserFactory()
|
|
|
|
return self.yacc_kwargs
|
|
|
|
|
|
|
|
if attr == 'lex':
|
|
|
|
self.lex = ply.lex.lex(module=self, **self.lex_kwargs)
|
|
|
|
return self.lex
|
|
|
|
|
|
|
|
if attr == 'yacc':
|
|
|
|
self.yacc = ply.yacc.yacc(module=self, **self.yacc_kwargs)
|
|
|
|
return self.yacc
|
|
|
|
|
|
|
|
if attr == 'current_lexer':
|
|
|
|
if not self.lexers:
|
|
|
|
return None
|
|
|
|
return self.lexers[-1][0]
|
|
|
|
|
|
|
|
if attr == 'current_source':
|
|
|
|
if not self.lexers:
|
|
|
|
return '<none>'
|
|
|
|
return self.lexers[-1][1]
|
|
|
|
|
|
|
|
if attr == 'current_line':
|
|
|
|
if not self.lexers:
|
|
|
|
return -1
|
|
|
|
return self.current_lexer.lineno
|
|
|
|
|
|
|
|
raise AttributeError, \
|
|
|
|
"'%s' object has no attribute '%s'" % (type(self), attr)
|
|
|
|
|
|
|
|
def parse_string(self, data, source='<string>', debug=None, tracking=0):
|
|
|
|
if not isinstance(data, basestring):
|
|
|
|
raise AttributeError, \
|
|
|
|
"argument must be a string, was '%s'" % type(f)
|
|
|
|
|
|
|
|
import new
|
|
|
|
lexer = self.lex.clone()
|
|
|
|
lexer.input(data)
|
|
|
|
self.lexers.append((lexer, source))
|
|
|
|
dict = {
|
|
|
|
'productions' : self.yacc.productions,
|
|
|
|
'action' : self.yacc.action,
|
|
|
|
'goto' : self.yacc.goto,
|
|
|
|
'errorfunc' : self.yacc.errorfunc,
|
|
|
|
}
|
|
|
|
parser = new.instance(ply.yacc.LRParser, dict)
|
|
|
|
result = parser.parse(lexer=lexer, debug=debug, tracking=tracking)
|
|
|
|
self.lexers.pop()
|
|
|
|
return result
|
|
|
|
|
|
|
|
def parse_file(self, f, **kwargs):
|
|
|
|
if isinstance(f, basestring):
|
|
|
|
source = f
|
|
|
|
f = file(f, 'r')
|
|
|
|
elif isinstance(f, file):
|
|
|
|
source = f.name
|
|
|
|
else:
|
|
|
|
raise AttributeError, \
|
|
|
|
"argument must be either a string or file, was '%s'" % type(f)
|
|
|
|
|
|
|
|
return self.parse_string(f.read(), source, **kwargs)
|
2009-08-16 22:40:01 +02:00
|
|
|
|
|
|
|
def p_error(self, t):
|
|
|
|
if t:
|
2011-07-06 03:30:04 +02:00
|
|
|
msg = "Syntax error at %s:%d:%d\n>>%s<<" % \
|
|
|
|
(self.current_source, t.lineno, t.lexpos + 1, t.value)
|
2009-08-16 22:40:01 +02:00
|
|
|
else:
|
2011-07-06 03:30:04 +02:00
|
|
|
msg = "Syntax error at end of %s" % (self.current_source, )
|
2009-08-16 22:40:01 +02:00
|
|
|
raise ParseError(msg, t)
|
|
|
|
|
2011-07-06 03:30:04 +02:00
|
|
|
def t_error(self, t):
|
|
|
|
msg = "Illegal character %s @ %d:%d" % \
|
|
|
|
(`t.value[0]`, t.lineno, t.lexpos)
|
|
|
|
raise ParseError(msg, t)
|