From b3971cab8767d0cfc68ddeabc25a7f8b34a2f44c Mon Sep 17 00:00:00 2001 From: David Kerkeslager Date: Sat, 13 Jun 2015 16:55:48 -0400 Subject: [PATCH 1/1] Basic empty program returning 0 --- .gitignore | 5 + LICENSE | 661 +++++++++++++++++++++ README.md | 1 + integration_tests/0001_integer_literal.stt | 1 + integration_tests/0001_integer_literal.txt | 0 stutter.py | 253 ++++++++ stutter_integration_tests.py | 68 +++ stutter_test.py | 250 ++++++++ 8 files changed, 1239 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 integration_tests/0001_integer_literal.stt create mode 100644 integration_tests/0001_integer_literal.txt create mode 100644 stutter.py create mode 100644 stutter_integration_tests.py create mode 100644 stutter_test.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..6b7f3f3 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +a.out.c +__pycache__ +.env +*.pyc +*.swp diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..dba13ed --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..80027e3 --- /dev/null +++ b/README.md @@ -0,0 +1 @@ +# stutter diff --git a/integration_tests/0001_integer_literal.stt b/integration_tests/0001_integer_literal.stt new file mode 100644 index 0000000..573541a --- /dev/null +++ b/integration_tests/0001_integer_literal.stt @@ -0,0 +1 @@ +0 diff --git a/integration_tests/0001_integer_literal.txt b/integration_tests/0001_integer_literal.txt new file mode 100644 index 0000000..e69de29 diff --git a/stutter.py b/stutter.py new file mode 100644 index 0000000..3f1409d --- /dev/null +++ b/stutter.py @@ -0,0 +1,253 @@ +#!/usr/bin/env python + +''' +To run this file: + + python stutter.py stutter_code.stt > c_code.c +''' + +import re +import string + +# Utility functions + +def is_integer(s_expression): + return isinstance(s_expression, int) \ + and not s_expression is True \ + and not s_expression is False + +# String to s-expressions + +TOKEN = re.compile(r'\s*({})'.format('|'.join('(?P<{}>{})'.format(*token) for token in [ + ('open_parenthese', r'\('), + ('close_parenthese', r'\)'), + ('integer_literal', r'\d+'), + ('unexpected_character', r'.'), +]))) + +def parse_all(source): + stack = [] + items = [] + + for token in TOKEN.finditer(source): + if token.group('open_parenthese'): + stack.append(items) + items = [] + + elif token.group('close_parenthese'): + if len(stack) == 0: + raise Exception('Parenthese closed but not opened') + + stack[-1].append(tuple(items)) + items = stack.pop() + + elif token.group('integer_literal'): + items.append(int(token.group('integer_literal'))) + + elif token.group('unexpected_character'): + raise Exception('Unexpected character {}'.format( + token.group('unexpected_character'), + )) + + else: + raise Exception() + + + if len(stack) > 0: + raise Exception('Parenthese opened but not closed') + + return items + +# C AST Objects + +class CType(object): + def __init__(self, name): + self.name = name + +class CPointerType(CType): + def __init__(self, pointer_to): + self.pointer_to = pointer_to + +class CArgumentDeclaration(object): + def __init__(self, type, name): + assert isinstance(type, CType) + self.type = type + self.name = name + +class CExpression(object): + pass + +class CIntegerLiteralExpression(CExpression): + def __init__(self, integer): + assert isinstance(integer, int) + + # Booleans in Python are integers but we don't want them + assert not integer is True + assert not integer is False + + self.integer = integer + +class CFunctionCallExpression(CExpression): + def __init__(self, name, arguments): + assert all(isinstance(argument, CExpression) for argument in arguments) + self.name = name + self.arguments = arguments + +class CStatement(object): + pass + +class CExpressionStatement(CStatement): + def __init__(self, expression): + self.expression = expression + +class CReturnStatement(CStatement): + def __init__(self, expression): + self.expression = expression + +class CFunctionDeclaration(object): + def __init__(self, return_type, name, argument_declaration_list, body): + assert isinstance(return_type, CType) + assert isinstance(argument_declaration_list, list) + assert all(isinstance(ad, CArgumentDeclaration) for ad in argument_declaration_list) + assert isinstance(body, list) + assert all(isinstance(s, CStatement) for s in body) + + self.return_type = return_type + self.name = name + self.argument_declaration_list = argument_declaration_list + self.body = body + +# BEGIN S-expression to C AST layer + +def evaluate_to_c(s_expression): + if is_integer(s_expression): + return CIntegerLiteralExpression(s_expression) + + raise Exception('Unable to evaluate expression {} to C'.format(s_expression)) + +def evaluate_all_to_c(s_expressions): + c_expressions = list(map(evaluate_to_c, s_expressions)) + body = list(map(CExpressionStatement, c_expressions[:-1])) + [CReturnStatement(c_expressions[-1])] + + return CFunctionDeclaration( + CType('int'), + 'main', + [ + CArgumentDeclaration(CType('int'), 'argc'), + CArgumentDeclaration(CPointerType(CPointerType(CType('char'))), 'argv'), + ], + body, + ) + +# BEGIN C AST to C source layer + +TAB_WIDTH = 2 + +def indent(string): + assert isinstance(string, str) + + def indent_line(line): + line = line.rstrip() + + if line == '': + return line + + return ' ' * TAB_WIDTH + line + + return '\n'.join(indent_line(line) for line in string.splitlines()) + +def generate_pointer_type(pointer_type): + assert isinstance(pointer_type, CPointerType) + return '{}*'.format(generate_type(pointer_type.pointer_to)) + +def generate_type( + type, + generate_pointer_type = generate_pointer_type): + assert isinstance(type, CType) + + if isinstance(type, CPointerType): + return generate_pointer_type(type) + + return type.name + +def generate_argument_declaration(argument_declaration): + assert isinstance(argument_declaration, CArgumentDeclaration) + return '{} {}'.format(generate_type(argument_declaration.type), argument_declaration.name) + +def generate_argument_declaration_list(argument_declarations): + return ', '.join(generate_argument_declaration(ad) for ad in argument_declarations) + +def generate_integer_literal_expression(expression): + assert isinstance(expression, CIntegerLiteralExpression) + return str(expression.integer) + +def generate_function_call_expression(expression): + assert isinstance(expression, CFunctionCallExpression) + return '{}({})'.format( + expression.name, + ', '.join(generate_expression(e) for e in expression.arguments), + ) + +def generate_expression( + expression, + generate_integer_literal_expression = generate_integer_literal_expression, + generate_function_call_expression = generate_function_call_expression, + ): + + if isinstance(expression, CIntegerLiteralExpression): + return generate_integer_literal_expression(expression) + + if isinstance(expression, CFunctionCallExpression): + return generate_function_call_expression(expression) + + raise Exception('Expression type {} not implemented'.format(type(expression))) + +def generate_expression_statement(statement): + return '{};'.format(generate_expression(statement.expression)) + +def generate_return_statement(statement): + return 'return {};'.format(generate_expression(statement.expression)) + +def generate_statement( + statement, + generate_expression_statement = generate_expression_statement, + generate_return_statement = generate_return_statement): + + if isinstance(statement, CExpressionStatement): + return generate_expression_statement(statement) + + if isinstance(statement, CReturnStatement): + return generate_return_statement(statement) + + raise Exception('Handling for statements of type {} not implemented'.format(type(statement.type))) + +def generate_statement_list(statements): + assert all(isinstance(s, CStatement) for s in statements) + return '\n'.join(generate_statement(s) for s in statements) + +FUNCTION_DEFINITION_TEMPLATE = string.Template( +''' +$return_type $name($argument_declaration_list) +{ +$body +} +'''.strip()) + +def generate_function_declaration(function_declaration): + assert isinstance(function_declaration, CFunctionDeclaration) + return FUNCTION_DEFINITION_TEMPLATE.substitute( + return_type = generate_type(function_declaration.return_type), + name = function_declaration.name, + argument_declaration_list = generate_argument_declaration_list(function_declaration.argument_declaration_list), + body = indent(generate_statement_list(function_declaration.body)), + ) + +if __name__ == '__main__': + import sys + source_file_name = sys.argv[1] + + with open(source_file_name, 'r') as source_file: + source = source_file.read() + + result = generate_function_declaration(evaluate_all_to_c(parse_all(source))) + print(result) diff --git a/stutter_integration_tests.py b/stutter_integration_tests.py new file mode 100644 index 0000000..777edeb --- /dev/null +++ b/stutter_integration_tests.py @@ -0,0 +1,68 @@ +import os +import os.path +import subprocess +import unittest + +CC = 'gcc-4.9' + +FILE_PATH = os.path.dirname(os.path.realpath(__file__)) +INTEGRATION_TEST_DIRECTORY_PATH = os.path.join(FILE_PATH, 'integration_tests') +os.chdir(FILE_PATH) + +integration_test_file_names = [ + fn + for fn in os.listdir(INTEGRATION_TEST_DIRECTORY_PATH) \ + if fn.endswith('.stt') +] + +C_SOURCE_FILE_PATH = os.path.join(FILE_PATH, 'a.c') +BINARY_PATH = os.path.join(FILE_PATH, 'a.out') + +def generate_test(input_file_name): + input_file_path = os.path.join(INTEGRATION_TEST_DIRECTORY_PATH, input_file_name) + expected_output_file_path = input_file_path[:-4] + '.txt' + + def test(self): + c_source = subprocess.check_output(['python','stutter.py',input_file_path]) + + self.assertIsNotNone(c_source) + self.assertNotEqual(0, len(c_source)) + + with open(C_SOURCE_FILE_PATH,'wb') as c_source_file: + c_source_file.write(c_source) + + cc_result = subprocess.call([CC, C_SOURCE_FILE_PATH]) + + self.assertEqual(0, cc_result) + + with open(expected_output_file_path, 'rb') as expected_output_file: + expected_output = expected_output_file.read() + + actual_output = subprocess.check_output(BINARY_PATH) + + self.assertEqual(expected_output, actual_output) + + return test + +class IntegrationTests(unittest.TestCase): + def tearDown(self): + try: + os.remove(C_SOURCE_FILE_PATH) + + except OSError as e: + if e.errno != errno.ENOENT: + raise + + try: + os.remove(BINARY_PATH) + + except OSError as e: + if e.errno != errno.ENOENT: + raise + +for integration_test_file_name in integration_test_file_names: + test = generate_test(integration_test_file_name) + test_name = 'test_{}'.format(integration_test_file_name[:-4]) + setattr(IntegrationTests, test_name, test) + +unittest.main() diff --git a/stutter_test.py b/stutter_test.py new file mode 100644 index 0000000..7a0cefe --- /dev/null +++ b/stutter_test.py @@ -0,0 +1,250 @@ +#!/usr/bin/env python + +import stutter +import unittest + +class IsIntegerTests(unittest.TestCase): + def test_returns_true_for_integers(self): + for i in range(10): + self.assertTrue(stutter.is_integer(i)) + + def test_returns_false_for_booleans(self): + self.assertFalse(stutter.is_integer(True)) + self.assertFalse(stutter.is_integer(False)) + + def test_returns_false_for_other_types(self): + for o in [object(), '', 0.1, [], (), {}, set()]: + self.assertFalse(stutter.is_integer(o)) + +class ParseAllTests(unittest.TestCase): + def test_parses_integers(self): + expected = [0] + actual = stutter.parse_all('0') + + self.assertEqual(expected, actual) + + def test_parses_empty_s_expressions(self): + expected = [()] + actual = stutter.parse_all('()') + + self.assertEqual(expected, actual) + + def test_parses_s_expressions(self): + expected = [(0, 1, 2)] + actual = stutter.parse_all('(0 1 2)') + + self.assertEqual(expected, actual) + + def test_parses_nested_s_expressions(self): + expected = [(0, (1, (2,)))] + actual = stutter.parse_all('(0 (1 (2)))') + + self.assertEqual(expected, actual) + + def test_parses_multiple_expressions(self): + expected = [0, ()] + actual = stutter.parse_all('0 ()') + + self.assertEqual(expected, actual) + + def test_raises_exception_for_unclosed_parenthese(self): + self.assertRaises(Exception, stutter.parse_all, '(') + + def test_raises_exception_for_unopened_parenthese(self): + self.assertRaises(Exception, stutter.parse_all, ')') + +class EvaluateToCTests(unittest.TestCase): + def test_evaluates_integers(self): + for i in range(5): + result = stutter.evaluate_to_c(i) + self.assertIsInstance(result, stutter.CIntegerLiteralExpression) + self.assertEqual(result.integer, i) + +class EvaluateAllToCTests(unittest.TestCase): + def test_returns_main(self): + result = stutter.evaluate_all_to_c([0]) + + self.assertIsInstance(result, stutter.CFunctionDeclaration) + self.assertEqual(result.name, 'main') + + def test_main_contains_expression_statements_followed_by_return_statement(self): + result = stutter.evaluate_all_to_c([0,0,0]) + + self.assertIsInstance(result.body[0],stutter.CExpressionStatement) + self.assertIsInstance(result.body[1],stutter.CExpressionStatement) + self.assertIsInstance(result.body[2],stutter.CReturnStatement) + +class IndentTests(unittest.TestCase): + def test_indents_single_line(self): + expected = ' Hello, world' + actual = stutter.indent('Hello, world') + self.assertEqual(expected, actual) + + def test_indents_multiple_lines(self): + expected = ' Hello, world\n Goodbye, cruel world' + actual = stutter.indent('Hello, world\nGoodbye, cruel world') + self.assertEqual(expected, actual) + + def test_leaves_empty_lines_empty(self): + expected = ' Hello, world\n\n Goodbye, cruel world' + actual = stutter.indent('Hello, world\n \nGoodbye, cruel world') + self.assertEqual(expected, actual) + + def test_indents_already_indented_lines(self): + expected = ' Hello, world\n\n Goodbye, cruel world' + actual = stutter.indent(' Hello, world\n \n Goodbye, cruel world') + self.assertEqual(expected, actual) + +class GeneratePointerTypeTests(unittest.TestCase): + def test_basic(self): + expected = 'int*' + actual = stutter.generate_pointer_type(stutter.CPointerType(stutter.CType('int'))) + self.assertEqual(expected, actual) + +class GenerateTypeTests(unittest.TestCase): + def test_basic(self): + expected = 'int' + actual = stutter.generate_type(stutter.CType('int')) + self.assertEqual(expected, actual) + + def test_generates_pointer_types(self): + expected = object() + actual = stutter.generate_type( + stutter.CPointerType(stutter.CType('int')), + generate_pointer_type = lambda x : expected) + + self.assertIs(expected, actual) + +class GenerateArgumentDeclarationTests(unittest.TestCase): + def test_basic(self): + expected = 'int argc' + actual = stutter.generate_argument_declaration( + stutter.CArgumentDeclaration(stutter.CType('int'), 'argc')) + self.assertEqual(expected, actual) + +class GenerateArgumentDeclarationListTests(unittest.TestCase): + def test_basic(self): + argument_declarations = [ + stutter.CArgumentDeclaration(stutter.CType('int'),'argc'), + stutter.CArgumentDeclaration(stutter.CPointerType(stutter.CPointerType(stutter.CType('char'))), 'argv'), + ] + expected = 'int argc, char** argv' + actual = stutter.generate_argument_declaration_list(argument_declarations) + self.assertEqual(expected, actual) + +class GenerateIntegerLiteralExpressionTests(unittest.TestCase): + def test_basic(self): + expected = '0' + actual = stutter.generate_integer_literal_expression( + stutter.CIntegerLiteralExpression(0), + ) + self.assertEqual(expected, actual) + +class GenerateFunctionCallExpressionTests(unittest.TestCase): + def test_no_arguments(self): + expected = 'name()' + actual = stutter.generate_function_call_expression( + stutter.CFunctionCallExpression('name', []), + ) + self.assertEqual(expected, actual) + + def test_one_argument(self): + expected = 'name(0)' + actual = stutter.generate_function_call_expression( + stutter.CFunctionCallExpression( + 'name', + [ + stutter.CIntegerLiteralExpression(0), + ], + ), + ) + self.assertEqual(expected, actual) + + def test_many_arguments(self): + expected = 'name(0, 1)' + actual = stutter.generate_function_call_expression( + stutter.CFunctionCallExpression( + 'name', + [ + stutter.CIntegerLiteralExpression(0), + stutter.CIntegerLiteralExpression(1), + ], + ), + ) + self.assertEqual(expected, actual) + +class GenerateExpressionTests(unittest.TestCase): + def test_generates_integer_literal_expressions(self): + expected = object() + actual = stutter.generate_expression( + stutter.CIntegerLiteralExpression(0), + generate_integer_literal_expression = lambda x : expected) + + self.assertIs(expected, actual) + + def test_generates_function_call_expression(self): + expected = object() + actual = stutter.generate_expression( + stutter.CFunctionCallExpression('name',[]), + generate_function_call_expression = lambda x : expected) + + self.assertIs(expected, actual) + +class GenerateStatement(unittest.TestCase): + def test_generates_expression_statement(self): + return_statement = stutter.CExpressionStatement('0') + + expected = object() + actual = stutter.generate_statement( + return_statement, + generate_expression_statement = lambda _ : expected) + + self.assertIs(expected, actual) + + def test_generates_return_statement(self): + return_statement = stutter.CReturnStatement(stutter.CIntegerLiteralExpression(0)) + + expected = object() + actual = stutter.generate_statement( + return_statement, + generate_return_statement = lambda _ : expected) + + self.assertIs(expected, actual) + +class GenerateExpressionStatementTests(unittest.TestCase): + def test_generates_return_statement(self): + expression_statement = stutter.CExpressionStatement(stutter.CIntegerLiteralExpression(0)) + + expected = '0;' + actual = stutter.generate_expression_statement(expression_statement) + + self.assertEqual(expected, actual) + +class GenerateReturnStatementTests(unittest.TestCase): + def test_generates_return_statement(self): + return_statement = stutter.CReturnStatement(stutter.CIntegerLiteralExpression(0)) + + expected = 'return 0;' + actual = stutter.generate_return_statement(return_statement) + + self.assertEqual(expected, actual) + +class GenerateFunctionDeclarationTests(unittest.TestCase): + def test_basic(self): + return_type = stutter.CType('int') + argument_declarations = [ + stutter.CArgumentDeclaration(stutter.CType('int'),'argc'), + stutter.CArgumentDeclaration(stutter.CPointerType(stutter.CPointerType(stutter.CType('char'))), 'argv'), + ] + + function_declaration = stutter.CFunctionDeclaration( + return_type, + 'main', + argument_declarations, + [stutter.CReturnStatement(stutter.CIntegerLiteralExpression(0))]) + + expected = 'int main(int argc, char** argv)\n{\n return 0;\n}' + actual = stutter.generate_function_declaration(function_declaration) + self.assertEqual(expected, actual) + +unittest.main() -- 2.20.1