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/**
* \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 <stdlib.h>
#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_ASSERT( ( 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 ) )
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i) \
{ \
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
| ( (uint32_t) (b)[(i) + 1] << 16 ) \
| ( (uint32_t) (b)[(i) + 2] << 8 ) \
| ( (uint32_t) (b)[(i) + 3] ); \
}
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i) \
{ \
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 3] = (unsigned char) ( (n) ); \
}
#endif
#endif /* TEST_MACROS_H */
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