# Copyright (C) 2014 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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upper_bound_int_pow2 = 31
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upper_bound_int_pow2_neg = 32
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upper_bound_long_pow2 = 63
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upper_bound_long_pow2_neg = 64
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upper_bound_constant = 100
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all_tests = [
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({'@INT@': 'int', '@SUFFIX@':''},
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[('CheckDiv', 'idiv_by_pow2_', [2**i for i in range(upper_bound_int_pow2)]),
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('CheckDiv', 'idiv_by_pow2_neg_', [-2**i for i in range(upper_bound_int_pow2_neg)]),
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('CheckDiv', 'idiv_by_constant_', [i for i in range(1, upper_bound_constant)]),
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('CheckDiv', 'idiv_by_constant_neg_', [-i for i in range(1, upper_bound_constant)]),
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('CheckRem', 'irem_by_pow2_', [2**i for i in range(upper_bound_int_pow2)]),
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('CheckRem', 'irem_by_pow2_neg_', [-2**i for i in range(upper_bound_int_pow2_neg)]),
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('CheckRem', 'irem_by_constant_', [i for i in range(1, upper_bound_constant)]),
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('CheckRem', 'irem_by_constant_neg_', [-i for i in range(1, upper_bound_constant)])]),
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({'@INT@': 'long', '@SUFFIX@': 'l'},
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[('CheckDiv', 'ldiv_by_pow2_', [2**i for i in range(upper_bound_long_pow2)]),
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('CheckDiv', 'ldiv_by_pow2_neg_', [-2**i for i in range(upper_bound_long_pow2_neg)]),
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('CheckDiv', 'ldiv_by_constant_', [i for i in range(1, upper_bound_constant)]),
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('CheckDiv', 'ldiv_by_constant_neg_', [-i for i in range(1, upper_bound_constant)]),
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('CheckRem', 'lrem_by_pow2_', [2**i for i in range(upper_bound_long_pow2)]),
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('CheckRem', 'lrem_by_pow2_neg_', [-2**i for i in range(upper_bound_long_pow2_neg)]),
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('CheckRem', 'lrem_by_constant_', [i for i in range(1, upper_bound_constant)]),
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('CheckRem', 'lrem_by_constant_neg_', [-i for i in range(1, upper_bound_constant)])])
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]
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def subst_vars(variables, text):
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'''Substitute variables in text.'''
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for key, value in variables.iteritems():
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text = text.replace(str(key), str(value))
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return text
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# Generate all the function bodies (in decls) and all the function calls (in calls).
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decls, calls = '', {}
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for default_vars, tests in all_tests:
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local_vars = default_vars.copy()
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int_type = local_vars['@INT@']
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for checker, name, values in tests:
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local_vars['@CHECKER@'] = checker
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for i, value in enumerate(values):
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local_vars['@NAME@'] = name + str(i)
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local_vars['@VALUE@'] = value
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local_vars['@OP@'] = '/' if 'div' in name else '%'
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# Function body.
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decls += subst_vars(local_vars, '''
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public static @INT@ @NAME@(@INT@ x) {return x @OP@ @VALUE@@SUFFIX@;}''')
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# Function call and test.
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calls[int_type] = calls.get(int_type, '') + subst_vars(local_vars, '''
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@INT@@CHECKER@("@NAME@", @NAME@(x), x, @VALUE@@SUFFIX@);''')
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# Generate the checkers.
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checkers = ''
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local_vars = {}
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for int_type in ('int', 'long'):
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local_vars['@INT@'] = int_type
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for op, op_name in (('/', 'Div'), ('%', 'Rem')):
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local_vars['@OP@'] = op
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local_vars['@OP_NAME@'] = op_name
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checkers += subst_vars(local_vars, '''
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public static void @INT@Check@OP_NAME@(String desc, @INT@ result, @INT@ dividend, @INT@ divisor) {
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@INT@ correct_result = dividend @OP@ divisor;
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if (result != correct_result) {
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reportError(desc + "(" + dividend + ") == " + result +
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" should be " + correct_result);
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}
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}''')
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code = \
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'''/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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public class Main {
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public static int num_errors = 0;
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public static void reportError(String message) {
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if (num_errors == 10) {
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System.out.println("Omitting other error messages...");
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} else if (num_errors < 10) {
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System.out.println(message);
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}
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num_errors += 1;
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}
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%s
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%s
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public static void intCheckAll(int x) {%s
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}
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public static void longCheckAll(long x) {%s
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}
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public static void main(String[] args) {
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int i;
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long l;
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System.out.println("Begin");
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System.out.println("Int: checking some equally spaced dividends...");
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for (i = -1000; i < 1000; i += 300) {
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intCheckAll(i);
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intCheckAll(-i);
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}
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System.out.println("Int: checking small dividends...");
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for (i = 1; i < 100; i += 1) {
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intCheckAll(i);
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intCheckAll(-i);
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}
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System.out.println("Int: checking big dividends...");
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for (i = 0; i < 100; i += 1) {
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intCheckAll(Integer.MAX_VALUE - i);
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intCheckAll(Integer.MIN_VALUE + i);
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}
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System.out.println("Long: checking some equally spaced dividends...");
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for (l = 0l; l < 1000000000000l; l += 300000000000l) {
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longCheckAll(l);
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longCheckAll(-l);
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}
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System.out.println("Long: checking small dividends...");
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for (l = 1l; l < 100l; l += 1l) {
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longCheckAll(l);
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longCheckAll(-l);
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}
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System.out.println("Long: checking big dividends...");
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for (l = 0l; l < 100l; l += 1l) {
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longCheckAll(Long.MAX_VALUE - l);
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longCheckAll(Long.MIN_VALUE + l);
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}
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System.out.println("End");
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}
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}
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''' % (checkers, decls, calls['int'], calls['long'])
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with open('src/Main.java', 'w') as f:
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f.write(code)
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