296 lines
12 KiB
C
296 lines
12 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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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#include <stdlib.h>
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#define mbedtls_fprintf fprintf
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#define mbedtls_snprintf snprintf
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#define mbedtls_exit exit
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#define mbedtls_time time
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#define mbedtls_time_t time_t
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#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
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#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
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#endif
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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 expressions and fail the test case if they have different
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* values.
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*
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* \param expr1 An expression to evaluate.
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* \param expr2 The expected value of \p expr1. This can be any
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* expression, but it is typically a constant.
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*/
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#define TEST_EQUAL( expr1, expr2 ) \
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TEST_ASSERT( ( expr1 ) == ( expr2 ) )
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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_ASSERT( ( 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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/** Allocate memory dynamically and fail the test case if this fails.
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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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#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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/*
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* 32-bit integer manipulation macros (big endian)
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*/
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#ifndef GET_UINT32_BE
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#define GET_UINT32_BE(n,b,i) \
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{ \
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(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
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| ( (uint32_t) (b)[(i) + 1] << 16 ) \
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| ( (uint32_t) (b)[(i) + 2] << 8 ) \
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| ( (uint32_t) (b)[(i) + 3] ); \
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}
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#endif
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#ifndef PUT_UINT32_BE
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#define PUT_UINT32_BE(n,b,i) \
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{ \
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(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
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(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
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(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
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(b)[(i) + 3] = (unsigned char) ( (n) ); \
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}
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#endif
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#endif /* TEST_MACROS_H */
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