ObjDeclAST.py revision 9366:bf8eb26c7b7e 
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
2# Copyright (c) 2009 The Hewlett-Packard Development Company
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;
9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
11# documentation and/or other materials provided with the distribution;
12# neither the name of the copyright holders nor the names of its
13# contributors may be used to endorse or promote products derived from
14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28from slicc.ast.DeclAST import DeclAST
29from slicc.symbols import Var
30
31class ObjDeclAST(DeclAST):
32    def __init__(self, slicc, type_ast, ident, pairs):
33        super(ObjDeclAST, self).__init__(slicc, pairs)
34
35        self.type_ast = type_ast
36        self.ident = ident
37
38    def __repr__(self):
39        return "[ObjDecl: %r]" % self.ident
40
41    def generate(self):
42        machineComponentSym = False
43
44        if "network" in self and "virtual_network" not in self:
45            self.error("Network queues require a 'virtual_network' attribute")
46
47        type = self.type_ast.type
48        if type.isBuffer and "ordered" not in self:
49            self.error("Buffer object decls require an 'ordered' attribute")
50
51        if "ordered" in self:
52            value = self["ordered"]
53
54            if value not in ("true", "false"):
55                self.error("The 'ordered' attribute is '%s' " + \
56                           "must be 'true' or 'false'.", value)
57
58        if "random" in self:
59            value = self["random"]
60            if value not in ("true", "false"):
61                self.error("The 'random' attribute is '%s' " + \
62                           "must be 'true' or 'false'.", value)
63
64        machine = self.symtab.state_machine
65
66        # FIXME : should all use accessors here to avoid public member
67        # variables
68        if self.ident == "version":
69            c_code = "m_version"
70        elif self.ident == "machineID":
71            c_code = "m_machineID"
72        elif machine:
73            c_code = "(*m_%s_%s_ptr)" % (machine.ident, self.ident)
74        else:
75            c_code = "(*m_%s_ptr)" % (self.ident)
76
77        v = Var(self.symtab, self.ident, self.location, type, c_code,
78                self.pairs, machine)
79
80        if machine:
81            machine.addObject(v)
82
83        self.symtab.newSymbol(v)
84
85        # used to cheat-- that is, access components in other machines
86        if machineComponentSym:
87            self.symtab.newMachComponentSym(v)
88