Func.py revision 11062 
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                 param_strings, body, pairs):
34        super(Func, self).__init__(table, ident, location, pairs)
35        self.return_type = return_type
36        self.param_types = param_types
37        self.param_strings = param_strings
38        self.body = body
39        self.isInternalMachineFunc = False
40        self.c_ident = ident
41        self.c_name = name
42        self.class_name = ""
43
44    def __repr__(self):
45        return ""
46
47    @property
48    def prototype(self):
49        if "external" in self:
50            return ""
51
52        return_type = self.return_type.c_ident
53        void_type = self.symtab.find("void", Type)
54        if "return_by_ref" in self and self.return_type != void_type:
55            return_type += "&"
56        elif "return_by_pointer" in self and self.return_type != void_type:
57            return_type += "*"
58
59        return "%s %s(%s);" % (return_type, self.c_name,
60                               ", ".join(self.param_strings))
61
62    def writeCodeFiles(self, path, includes):
63        return
64
65    def checkArguments(self, args):
66        if len(args) != len(self.param_types):
67            self.error("Wrong number of arguments passed to function : '%s'" +\
68                       " Expected %d, got %d", self.c_ident,
69                       len(self.param_types), len(args))
70
71        cvec = []
72        type_vec = []
73        for expr,expected_type in zip(args, self.param_types):
74            # Check the types of the parameter
75            actual_type,param_code = expr.inline(True)
76            if str(actual_type) != 'OOD' and \
77               str(actual_type) != str(expected_type) and \
78               str(actual_type["interface"]) != str(expected_type):
79                expr.error("Type mismatch: expected: %s actual: %s" % \
80                           (expected_type, actual_type))
81            cvec.append(param_code)
82            type_vec.append(expected_type)
83
84        return cvec, type_vec
85
86    def generateCode(self):
87        '''This write a function of object Chip'''
88        if "external" in self:
89            return ""
90
91        code = self.symtab.codeFormatter()
92
93        # Generate function header
94        void_type = self.symtab.find("void", Type)
95        return_type = self.return_type.c_ident
96        if "return_by_ref" in self and self.return_type != void_type:
97            return_type += "&"
98        if "return_by_pointer" in self and self.return_type != void_type:
99            return_type += "*"
100
101        params = ', '.join(self.param_strings)
102
103        code('''
104$return_type
105${{self.class_name}}::${{self.c_name}}($params)
106{
107${{self.body}}
108}
109''')
110        return str(code)
111
112__all__ = [ "Func" ]
113