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aspid_parse.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2012 Informática MEG <[email protected]>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
from ply import *
import aspid_lex
tokens = aspid_lex.tokens
def p_program(p):
'''program : program command
| command'''
if len(p) == 2 and p[1]:
p[0] = { }
line,stat = p[1]
p[0][line] = stat
elif len(p) ==3:
p[0] = p[1]
if not p[0]: p[0] = { }
if p[2]:
line,stat = p[2]
p[0][line] = stat
def p_program_error(p):
'''program : error'''
p[0] = None
p.parser.error = 1
#### Format of all ASPID statements.
def p_command_1(p):
'''command : GROUP'''
group = p[1][1:-1]
p[0] = (p.lineno(1),('GROUP',group))
def p_command_2(p):
'''command : GROUP DOT COUNT index_stmt'''
group = p[1][1:-1]
p[0] = (p.lineno(1),('GROUP',(group,('COUNT',p[4]))))
def p_command_3(p):
'''command : GROUP DOT EXCLUDE GROUP'''
group = p[1][1:-1]
p[0] = (p.lineno(1),('GROUP',(group,('EXCLUDE',p[4]))))
def p_command_4(p):
'''command : NOT LPAREN GROUP RPAREN'''
group = p[3][1:-1]
p[0] = (p.lineno(1),('NOT',('GROUP',group) ) )
def p_command_5(p):
'''command : OR LPAREN GROUP RPAREN'''
group = p[3][1:-1]
p[0] = (p.lineno(1),('OR',('GROUP',group) ) )
def p_command_6(p):
'''command : REGEXP LPAREN STRING RPAREN'''
regexp = p[3][1:-1]
p[0] = (p.lineno(1),('REGEXP',regexp))
def p_command_nl(p):
'''command : NEWLINE'''
p[0] = None
def p_index_stmt(p):
'''index_stmt : INDEX_1
| INDEX_2
| LPAREN ONEORMORE RPAREN
| LPAREN ZEROORONE RPAREN
| LPAREN ZEROORMORE RPAREN'''
if len(p) == 2:
p[0] = p[1][1:-1]
if len(p) == 4:
p[0] = p[2]
#### Catastrophic error handler
def p_error(p):
if not p:
return "SYNTAX ERROR AT EOF"
else:
msj = "AN ERROR HAS OCURRED IN LINE <%s> IN THE VALUE <%s>" % (p.lexpos, p.value)
return msj
aspid_parser = yacc.yacc()
def parse(data,debug=0):
aspid_parser.error = 0
p = aspid_parser.parse(data,debug=debug)
if aspid_parser.error:
return aspid_parser.error
return p