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 Func, Type
30
31class FuncDeclAST(DeclAST):
32 def __init__(self, slicc, return_type, ident, formals, pairs, statements):
33 super(FuncDeclAST, self).__init__(slicc, pairs)
34
35 self.return_type = return_type
36 self.ident = ident
37 self.formals = formals
38 self.statements = statements
39
40 def __repr__(self):
41 return "[FuncDecl: %s]" % self.ident
42
43 def files(self, parent=None):
44 return set()
45
46 def generate(self, parent = None):
47 types = []
48 proto_params = []
49 body_params = []
50 default_count = 0
51 void_type = self.symtab.find("void", Type)
52
53 # Generate definition code
54 self.symtab.pushFrame()
55
56 # Lookup return type
57 return_type = self.return_type.type
58
59 # Generate function header
60 for formal in self.formals:
61 # Lookup parameter types
62 try:
63 type, proto, body, default = formal.generate()
64 types.append(type)
65 proto_params.append(proto)
66 body_params.append(body)
67 if default:
68 default_count += 1
69
70 except AttributeError:
71 types.append(formal.type)
72 proto_params.append(None)
73 body_params.append(None)
74
75 body = self.slicc.codeFormatter()
76 if self.statements is None:
77 self["external"] = "yes"
78 else:
79 rtype = self.statements.generate(body, return_type)
80
81 self.symtab.popFrame()
82
83 func_name_args = self.ident
84
85 if parent is None:
86 for arg in self.formals:
87 from slicc.ast import FormalParamAST
88 if isinstance(arg, FormalParamAST):
89 arg_name = arg.type_ast.ident
90 else:
91 arg_name = arg
92 func_name_args += "_" + str(arg_name)
93
94 machine = self.state_machine
95 func = Func(self.symtab, func_name_args, self.ident, self.location,
96 return_type, types, proto_params,
97 body_params, str(body), self.pairs, default_count)
98
99 if parent is not None:
100 if not parent.addFunc(func):
101 self.error("Duplicate method: %s:%s()" % (parent, self.ident))
102 func.class_name = parent.c_ident
103
104 elif machine is not None:
105 machine.addFunc(func)
106 func.isInternalMachineFunc = True
107 func.class_name = "%s_Controller" % machine
108 else:
109 self.symtab.newSymbol(func)