mirror of
https://github.com/Mbed-TLS/mbedtls.git
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257 lines
11 KiB
C
257 lines
11 KiB
C
/**
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* \file macros.h
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*
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* \brief This file contains generic macros for the purpose of testing.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* 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, WITHOUT
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* 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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#ifndef TEST_MACROS_H
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#define TEST_MACROS_H
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#include "mbedtls/build_info.h"
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#include <stdlib.h>
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#include "mbedtls/platform.h"
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#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
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#include "mbedtls/memory_buffer_alloc.h"
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#endif
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/**
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* \brief This macro tests the expression passed to it as a test step or
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* individual test in a test case.
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*
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* It allows a library function to return a value and return an error
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* code that can be tested.
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*
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* Failing the test means:
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* - Mark this test case as failed.
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* - Print a message identifying the failure.
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* - Jump to the \c exit label.
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*
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* This macro expands to an instruction, not an expression.
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* It may jump to the \c exit label.
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*
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* \param TEST The test expression to be tested.
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*/
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#define TEST_ASSERT(TEST) \
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do { \
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if (!(TEST)) \
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{ \
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mbedtls_test_fail( #TEST, __LINE__, __FILE__); \
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goto exit; \
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} \
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} while (0)
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/** Evaluate two integer expressions and fail the test case if they have
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* different values.
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*
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* The two expressions should have the same signedness, otherwise the
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* comparison is not meaningful if the signed value is negative.
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*
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* \param expr1 An integral-typed expression to evaluate.
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* \param expr2 Another integral-typed expression to evaluate.
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*/
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#define TEST_EQUAL(expr1, expr2) \
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do { \
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if (!mbedtls_test_equal( #expr1 " == " #expr2, __LINE__, __FILE__, \
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expr1, expr2)) \
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goto exit; \
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} while (0)
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/** Evaluate two unsigned integer expressions and fail the test case
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* if they are not in increasing order (left <= right).
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*
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* \param expr1 An integral-typed expression to evaluate.
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* \param expr2 Another integral-typed expression to evaluate.
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*/
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#define TEST_LE_U(expr1, expr2) \
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do { \
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if (!mbedtls_test_le_u( #expr1 " <= " #expr2, __LINE__, __FILE__, \
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expr1, expr2)) \
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goto exit; \
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} while (0)
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/** Evaluate two signed integer expressions and fail the test case
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* if they are not in increasing order (left <= right).
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*
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* \param expr1 An integral-typed expression to evaluate.
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* \param expr2 Another integral-typed expression to evaluate.
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*/
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#define TEST_LE_S(expr1, expr2) \
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do { \
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if (!mbedtls_test_le_s( #expr1 " <= " #expr2, __LINE__, __FILE__, \
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expr1, expr2)) \
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goto exit; \
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} while (0)
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/** Allocate memory dynamically and fail the test case if this fails.
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* The allocated memory will be filled with zeros.
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*
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* You must set \p pointer to \c NULL before calling this macro and
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* put `mbedtls_free( pointer )` in the test's cleanup code.
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*
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* If \p length is zero, the resulting \p pointer will be \c NULL.
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* This is usually what we want in tests since API functions are
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* supposed to accept null pointers when a buffer size is zero.
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*
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* This macro expands to an instruction, not an expression.
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* It may jump to the \c exit label.
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*
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* \param pointer An lvalue where the address of the allocated buffer
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* will be stored.
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* This expression may be evaluated multiple times.
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* \param length Number of elements to allocate.
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* This expression may be evaluated multiple times.
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*
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*/
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#define ASSERT_ALLOC(pointer, length) \
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do \
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{ \
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TEST_ASSERT((pointer) == NULL); \
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if ((length) != 0) \
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{ \
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(pointer) = mbedtls_calloc(sizeof(*(pointer)), \
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(length)); \
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TEST_ASSERT((pointer) != NULL); \
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} \
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} \
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while (0)
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/** Allocate memory dynamically. If the allocation fails, skip the test case.
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*
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* This macro behaves like #ASSERT_ALLOC, except that if the allocation
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* fails, it marks the test as skipped rather than failed.
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*/
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#define ASSERT_ALLOC_WEAK(pointer, length) \
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do \
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{ \
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TEST_ASSERT((pointer) == NULL); \
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if ((length) != 0) \
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{ \
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(pointer) = mbedtls_calloc(sizeof(*(pointer)), \
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(length)); \
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TEST_ASSUME((pointer) != NULL); \
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} \
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} \
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while (0)
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/** Compare two buffers and fail the test case if they differ.
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*
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* This macro expands to an instruction, not an expression.
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* It may jump to the \c exit label.
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*
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* \param p1 Pointer to the start of the first buffer.
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* \param size1 Size of the first buffer in bytes.
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* This expression may be evaluated multiple times.
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* \param p2 Pointer to the start of the second buffer.
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* \param size2 Size of the second buffer in bytes.
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* This expression may be evaluated multiple times.
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*/
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#define ASSERT_COMPARE(p1, size1, p2, size2) \
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do \
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{ \
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TEST_EQUAL((size1), (size2)); \
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if ((size1) != 0) \
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TEST_ASSERT(memcmp((p1), (p2), (size1)) == 0); \
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} \
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while (0)
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/**
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* \brief This macro tests the expression passed to it and skips the
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* running test if it doesn't evaluate to 'true'.
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*
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* \param TEST The test expression to be tested.
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*/
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#define TEST_ASSUME(TEST) \
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do { \
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if (!(TEST)) \
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{ \
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mbedtls_test_skip( #TEST, __LINE__, __FILE__); \
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goto exit; \
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} \
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} while (0)
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#define TEST_HELPER_ASSERT(a) if (!(a)) \
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{ \
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mbedtls_fprintf(stderr, "Assertion Failed at %s:%d - %s\n", \
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__FILE__, __LINE__, #a); \
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mbedtls_exit(1); \
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}
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/** \def ARRAY_LENGTH
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* Return the number of elements of a static or stack array.
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*
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* \param array A value of array (not pointer) type.
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*
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* \return The number of elements of the array.
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*/
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/* A correct implementation of ARRAY_LENGTH, but which silently gives
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* a nonsensical result if called with a pointer rather than an array. */
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#define ARRAY_LENGTH_UNSAFE(array) \
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(sizeof(array) / sizeof(*(array)))
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#if defined(__GNUC__)
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/* Test if arg and &(arg)[0] have the same type. This is true if arg is
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* an array but not if it's a pointer. */
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#define IS_ARRAY_NOT_POINTER(arg) \
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(!__builtin_types_compatible_p(__typeof__(arg), \
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__typeof__(&(arg)[0])))
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/* A compile-time constant with the value 0. If `const_expr` is not a
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* compile-time constant with a nonzero value, cause a compile-time error. */
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#define STATIC_ASSERT_EXPR(const_expr) \
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(0 && sizeof(struct { unsigned int STATIC_ASSERT : 1 - 2 * !(const_expr); }))
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/* Return the scalar value `value` (possibly promoted). This is a compile-time
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* constant if `value` is. `condition` must be a compile-time constant.
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* If `condition` is false, arrange to cause a compile-time error. */
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#define STATIC_ASSERT_THEN_RETURN(condition, value) \
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(STATIC_ASSERT_EXPR(condition) ? 0 : (value))
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#define ARRAY_LENGTH(array) \
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(STATIC_ASSERT_THEN_RETURN(IS_ARRAY_NOT_POINTER(array), \
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ARRAY_LENGTH_UNSAFE(array)))
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#else
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/* If we aren't sure the compiler supports our non-standard tricks,
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* fall back to the unsafe implementation. */
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#define ARRAY_LENGTH(array) ARRAY_LENGTH_UNSAFE(array)
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#endif
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/** Return the smaller of two values.
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*
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* \param x An integer-valued expression without side effects.
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* \param y An integer-valued expression without side effects.
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*
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* \return The smaller of \p x and \p y.
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*/
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#define MIN(x, y) ((x) < (y) ? (x) : (y))
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/** Return the larger of two values.
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*
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* \param x An integer-valued expression without side effects.
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* \param y An integer-valued expression without side effects.
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*
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* \return The larger of \p x and \p y.
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*/
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#define MAX(x, y) ((x) > (y) ? (x) : (y))
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#endif /* TEST_MACROS_H */
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