Func.py revision 11030:17240f381d6a 
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.symbols.Symbol import Symbol
29from slicc.symbols.Type import Type
30
31class Func(Symbol):
32    def __init__(self, table, ident, name, location, return_type, param_types,
33                 proto_param_strings, body_param_strings, body,
34                 pairs, default_count = 0):
35        super(Func, self).__init__(table, ident, location, pairs)
36        self.return_type = return_type
37        self.param_types = param_types
38        self.proto_param_strings = proto_param_strings
39        self.body_param_strings = body_param_strings
40        self.body = body
41        self.isInternalMachineFunc = False
42        self.c_ident = ident
43        self.c_name = name
44        self.class_name = ""
45        self.default_count = default_count
46
47    def __repr__(self):
48        return ""
49
50    @property
51    def prototype(self):
52        if "external" in self:
53            return ""
54
55        return_type = self.return_type.c_ident
56        void_type = self.symtab.find("void", Type)
57        if "return_by_ref" in self and self.return_type != void_type:
58            return_type += "&"
59        elif "return_by_pointer" in self and self.return_type != void_type:
60            return_type += "*"
61
62        return "%s %s(%s);" % (return_type, self.c_name,
63                               ", ".join(self.proto_param_strings))
64
65    def writeCodeFiles(self, path, includes):
66        return
67
68    def checkArguments(self, args):
69        if len(args) + self.default_count < len(self.param_types) or \
70           len(args) > len(self.param_types):
71            self.error("Wrong number of arguments passed to function: '%s'" + \
72                       " Expected at least: %d, got: %d", self.c_ident,
73                       len(self.param_types) - self.default_count, len(args))
74
75        cvec = []
76        type_vec = []
77        for expr,expected_type in zip(args, self.param_types):
78            # Check the types of the parameter
79            actual_type,param_code = expr.inline(True)
80            if str(actual_type) != 'OOD' and \
81               str(actual_type) != str(expected_type) and \
82               str(actual_type["interface"]) != str(expected_type):
83                expr.error("Type mismatch: expected: %s actual: %s" % \
84                           (expected_type, actual_type))
85            cvec.append(param_code)
86            type_vec.append(expected_type)
87
88        return cvec, type_vec
89
90    def generateCode(self):
91        '''This write a function of object Chip'''
92        if "external" in self:
93            return ""
94
95        code = self.symtab.codeFormatter()
96
97        # Generate function header
98        return_type = self.return_type.c_ident
99        void_type = self.symtab.find("void", Type)
100        if "return_by_ref" in self and self.return_type != void_type:
101            return_type += "&"
102        if "return_by_pointer" in self and self.return_type != void_type:
103            return_type += "*"
104
105        params = ', '.join(self.body_param_strings)
106
107        code('''
108$return_type
109${{self.class_name}}::${{self.c_name}}($params)
110{
111${{self.body}}
112}
113''')
114        return str(code)
115
116__all__ = [ "Func" ]
117