249 lines
9.2 KiB
Python
Executable File
249 lines
9.2 KiB
Python
Executable File
#!/usr/bin/env python
|
|
#
|
|
# Copyright 2008 Google Inc. All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""Generate Google Mock classes from base classes.
|
|
|
|
This program will read in a C++ source file and output the Google Mock
|
|
classes for the specified classes. If no class is specified, all
|
|
classes in the source file are emitted.
|
|
|
|
Usage:
|
|
gmock_class.py header-file.h [ClassName]...
|
|
|
|
Output is sent to stdout.
|
|
"""
|
|
|
|
import os
|
|
import re
|
|
import sys
|
|
|
|
from cpp import ast
|
|
from cpp import utils
|
|
|
|
# Preserve compatibility with Python 2.3.
|
|
try:
|
|
_dummy = set
|
|
except NameError:
|
|
import sets
|
|
|
|
set = sets.Set
|
|
|
|
_VERSION = (1, 0, 1) # The version of this script.
|
|
# How many spaces to indent. Can set me with the INDENT environment variable.
|
|
_INDENT = 2
|
|
|
|
|
|
def _RenderType(ast_type):
|
|
"""Renders the potentially recursively templated type into a string.
|
|
|
|
Args:
|
|
ast_type: The AST of the type.
|
|
|
|
Returns:
|
|
Rendered string and a boolean to indicate whether we have multiple args
|
|
(which is not handled correctly).
|
|
"""
|
|
has_multiarg_error = False
|
|
# Add modifiers like 'const'.
|
|
modifiers = ''
|
|
if ast_type.modifiers:
|
|
modifiers = ' '.join(ast_type.modifiers) + ' '
|
|
return_type = modifiers + ast_type.name
|
|
if ast_type.templated_types:
|
|
# Collect template args.
|
|
template_args = []
|
|
for arg in ast_type.templated_types:
|
|
rendered_arg, e = _RenderType(arg)
|
|
if e: has_multiarg_error = True
|
|
template_args.append(rendered_arg)
|
|
return_type += '<' + ', '.join(template_args) + '>'
|
|
# We are actually not handling multi-template-args correctly. So mark it.
|
|
if len(template_args) > 1:
|
|
has_multiarg_error = True
|
|
if ast_type.pointer:
|
|
return_type += '*'
|
|
if ast_type.reference:
|
|
return_type += '&'
|
|
return return_type, has_multiarg_error
|
|
|
|
|
|
def _GetNumParameters(parameters, source):
|
|
num_parameters = len(parameters)
|
|
if num_parameters == 1:
|
|
first_param = parameters[0]
|
|
if source[first_param.start:first_param.end].strip() == 'void':
|
|
# We must treat T(void) as a function with no parameters.
|
|
return 0
|
|
return num_parameters
|
|
|
|
|
|
def _GenerateMethods(output_lines, source, class_node):
|
|
function_type = (ast.FUNCTION_VIRTUAL | ast.FUNCTION_PURE_VIRTUAL |
|
|
ast.FUNCTION_OVERRIDE)
|
|
ctor_or_dtor = ast.FUNCTION_CTOR | ast.FUNCTION_DTOR
|
|
indent = ' ' * _INDENT
|
|
|
|
for node in class_node.body:
|
|
# We only care about virtual functions.
|
|
if (isinstance(node, ast.Function) and
|
|
node.modifiers & function_type and
|
|
not node.modifiers & ctor_or_dtor):
|
|
# Pick out all the elements we need from the original function.
|
|
const = ''
|
|
if node.modifiers & ast.FUNCTION_CONST:
|
|
const = 'CONST_'
|
|
num_parameters = _GetNumParameters(node.parameters, source)
|
|
return_type = 'void'
|
|
if node.return_type:
|
|
return_type, has_multiarg_error = _RenderType(node.return_type)
|
|
if has_multiarg_error:
|
|
for line in [
|
|
'// The following line won\'t really compile, as the return',
|
|
'// type has multiple template arguments. To fix it, use a',
|
|
'// typedef for the return type.']:
|
|
output_lines.append(indent + line)
|
|
tmpl = ''
|
|
if class_node.templated_types:
|
|
tmpl = '_T'
|
|
mock_method_macro = 'MOCK_%sMETHOD%d%s' % (const, num_parameters, tmpl)
|
|
|
|
args = ''
|
|
if node.parameters:
|
|
# Get the full text of the parameters from the start
|
|
# of the first parameter to the end of the last parameter.
|
|
start = node.parameters[0].start
|
|
end = node.parameters[-1].end
|
|
# Remove // comments.
|
|
args_strings = re.sub(r'//.*', '', source[start:end])
|
|
# Remove /* comments */.
|
|
args_strings = re.sub(r'/\*.*\*/', '', args_strings)
|
|
# Remove default arguments.
|
|
args_strings = re.sub(r'=.*,', ',', args_strings)
|
|
args_strings = re.sub(r'=.*', '', args_strings)
|
|
# Condense multiple spaces and eliminate newlines putting the
|
|
# parameters together on a single line. Ensure there is a
|
|
# space in an argument which is split by a newline without
|
|
# intervening whitespace, e.g.: int\nBar
|
|
args = re.sub(' +', ' ', args_strings.replace('\n', ' '))
|
|
|
|
# Create the mock method definition.
|
|
output_lines.extend(['%s%s(%s,' % (indent, mock_method_macro, node.name),
|
|
'%s%s(%s));' % (indent * 3, return_type, args)])
|
|
|
|
|
|
def _GenerateMocks(filename, source, ast_list, desired_class_names):
|
|
processed_class_names = set()
|
|
lines = []
|
|
for node in ast_list:
|
|
if (isinstance(node, ast.Class) and node.body and
|
|
# desired_class_names being None means that all classes are selected.
|
|
(not desired_class_names or node.name in desired_class_names)):
|
|
class_name = node.name
|
|
parent_name = class_name
|
|
processed_class_names.add(class_name)
|
|
class_node = node
|
|
# Add namespace before the class.
|
|
if class_node.namespace:
|
|
lines.extend(['namespace %s {' % n for n in class_node.namespace]) # }
|
|
lines.append('')
|
|
|
|
# Add template args for templated classes.
|
|
if class_node.templated_types:
|
|
# TODO(paulchang): The AST doesn't preserve template argument order,
|
|
# so we have to make up names here.
|
|
# TODO(paulchang): Handle non-type template arguments (e.g.
|
|
# template<typename T, int N>).
|
|
template_arg_count = len(class_node.templated_types.keys())
|
|
template_args = ['T%d' % n for n in range(template_arg_count)]
|
|
template_decls = ['typename ' + arg for arg in template_args]
|
|
lines.append('template <' + ', '.join(template_decls) + '>')
|
|
parent_name += '<' + ', '.join(template_args) + '>'
|
|
|
|
# Add the class prolog.
|
|
lines.append('class Mock%s : public %s {' # }
|
|
% (class_name, parent_name))
|
|
lines.append('%spublic:' % (' ' * (_INDENT // 2)))
|
|
|
|
# Add all the methods.
|
|
_GenerateMethods(lines, source, class_node)
|
|
|
|
# Close the class.
|
|
if lines:
|
|
# If there are no virtual methods, no need for a public label.
|
|
if len(lines) == 2:
|
|
del lines[-1]
|
|
|
|
# Only close the class if there really is a class.
|
|
lines.append('};')
|
|
lines.append('') # Add an extra newline.
|
|
|
|
# Close the namespace.
|
|
if class_node.namespace:
|
|
for i in range(len(class_node.namespace) - 1, -1, -1):
|
|
lines.append('} // namespace %s' % class_node.namespace[i])
|
|
lines.append('') # Add an extra newline.
|
|
|
|
if desired_class_names:
|
|
missing_class_name_list = list(desired_class_names - processed_class_names)
|
|
if missing_class_name_list:
|
|
missing_class_name_list.sort()
|
|
sys.stderr.write('Class(es) not found in %s: %s\n' %
|
|
(filename, ', '.join(missing_class_name_list)))
|
|
elif not processed_class_names:
|
|
sys.stderr.write('No class found in %s\n' % filename)
|
|
|
|
return lines
|
|
|
|
|
|
def main(argv=sys.argv):
|
|
if len(argv) < 2:
|
|
sys.stderr.write('Google Mock Class Generator v%s\n\n' %
|
|
'.'.join(map(str, _VERSION)))
|
|
sys.stderr.write(__doc__)
|
|
return 1
|
|
|
|
global _INDENT
|
|
try:
|
|
_INDENT = int(os.environ['INDENT'])
|
|
except KeyError:
|
|
pass
|
|
except:
|
|
sys.stderr.write('Unable to use indent of %s\n' % os.environ.get('INDENT'))
|
|
|
|
filename = argv[1]
|
|
desired_class_names = None # None means all classes in the source file.
|
|
if len(argv) >= 3:
|
|
desired_class_names = set(argv[2:])
|
|
source = utils.ReadFile(filename)
|
|
if source is None:
|
|
return 1
|
|
|
|
builder = ast.BuilderFromSource(source, filename)
|
|
try:
|
|
entire_ast = filter(None, builder.Generate())
|
|
except KeyboardInterrupt:
|
|
return
|
|
except:
|
|
# An error message was already printed since we couldn't parse.
|
|
sys.exit(1)
|
|
else:
|
|
lines = _GenerateMocks(filename, source, entire_ast, desired_class_names)
|
|
sys.stdout.write('\n'.join(lines))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main(sys.argv)
|