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