54c6134ff7
32-bit integer manipulation macros (little edian): GET_UINT32_LE and PUT_UINT32_LE appear in several files in library/. Removes duplicate code and save vertical space the macro has been moved to common.h. Improves maintainability. Also provided brief comment in common.h for BYTES_TO_U32_LE. comment/documentation will probably need to be edited further for all recent additions to library/common.h Signed-off-by: Joe Subbiani <joe.subbiani@arm.com>
135 lines
4.6 KiB
C
135 lines
4.6 KiB
C
/**
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* \file common.h
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*
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* \brief Utility macros for internal use in the library
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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 MBEDTLS_LIBRARY_COMMON_H
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#define MBEDTLS_LIBRARY_COMMON_H
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#include "mbedtls/build_info.h"
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/** Helper to define a function as static except when building invasive tests.
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*
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* If a function is only used inside its own source file and should be
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* declared `static` to allow the compiler to optimize for code size,
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* but that function has unit tests, define it with
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* ```
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* MBEDTLS_STATIC_TESTABLE int mbedtls_foo(...) { ... }
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* ```
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* and declare it in a header in the `library/` directory with
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* ```
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* #if defined(MBEDTLS_TEST_HOOKS)
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* int mbedtls_foo(...);
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* #endif
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* ```
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*/
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#if defined(MBEDTLS_TEST_HOOKS)
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#define MBEDTLS_STATIC_TESTABLE
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#else
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#define MBEDTLS_STATIC_TESTABLE static
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#endif
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#if defined(MBEDTLS_TEST_HOOKS)
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extern void (*mbedtls_test_hook_test_fail)( const char * test, int line, const char * file );
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#define MBEDTLS_TEST_HOOK_TEST_ASSERT( TEST ) \
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do { \
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if( ( ! ( TEST ) ) && ( ( *mbedtls_test_hook_test_fail ) != NULL ) ) \
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{ \
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( *mbedtls_test_hook_test_fail )( #TEST, __LINE__, __FILE__ ); \
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} \
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} while( 0 )
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#else
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#define MBEDTLS_TEST_HOOK_TEST_ASSERT( TEST )
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#endif /* defined(MBEDTLS_TEST_HOOKS) */
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/** Allow library to access its structs' private members.
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*
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* Although structs defined in header files are publicly available,
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* their members are private and should not be accessed by the user.
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*/
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#define MBEDTLS_ALLOW_PRIVATE_ACCESS
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/** Byte Reading Macros
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*
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* To tidy up code and save horizontal and vertical space, use byte
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* reading macros to cast
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*/
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#define BYTE_0( x ) ( (uint8_t) ( ( x ) & 0xff ) )
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#define BYTE_1( x ) ( (uint8_t) ( ( ( x ) >> 8 ) & 0xff ) )
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#define BYTE_2( x ) ( (uint8_t) ( ( ( x ) >> 16 ) & 0xff ) )
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#define BYTE_3( x ) ( (uint8_t) ( ( ( x ) >> 24 ) & 0xff ) )
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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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/*
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* 32-bit integer manipulation macros (little endian)
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*/
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#ifndef GET_UINT32_LE
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#define GET_UINT32_LE(n,b,i) \
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{ \
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(n) = ( (uint32_t) (b)[(i) ] ) \
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| ( (uint32_t) (b)[(i) + 1] << 8 ) \
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| ( (uint32_t) (b)[(i) + 2] << 16 ) \
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| ( (uint32_t) (b)[(i) + 3] << 24 ); \
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}
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#endif
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#ifndef PUT_UINT32_LE
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#define PUT_UINT32_LE(n,b,i) \
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{ \
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(b)[(i) ] = (unsigned char) ( ( (n) ) & 0xFF ); \
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(b)[(i) + 1] = (unsigned char) ( ( (n) >> 8 ) & 0xFF ); \
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(b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF ); \
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(b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF ); \
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}
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#endif
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/**
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* 32-bit integer conversion from bytes (little endian)
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*/
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#define BYTES_TO_U32_LE( data, offset ) \
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( (uint32_t) (data)[offset] \
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| (uint32_t) ( (uint32_t) (data)[( offset ) + 1] << 8 ) \
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| (uint32_t) ( (uint32_t) (data)[( offset ) + 2] << 16 ) \
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| (uint32_t) ( (uint32_t) (data)[( offset ) + 3] << 24 ) \
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)
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#endif /* MBEDTLS_LIBRARY_COMMON_H */
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