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/*
* Copyright (c) 2015, EURECOM (www.eurecom.fr)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those
* of the authors and should not be interpreted as representing official policies,
* either expressed or implied, of the FreeBSD Project.
*/
#ifndef ASN1_CONVERSIONS_H_
#define ASN1_CONVERSIONS_H_
#include "BIT_STRING.h"
#include "assertions.h"
//-----------------------begin func -------------------
/*! \fn uint8_t BIT_STRING_to_uint8(BIT_STRING_t *)
*\brief This function extract at most a 8 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
*\param[in] pointer to the BIT_STRING_t object.
*\return the extracted value.
*/
static inline uint8_t BIT_STRING_to_uint8(BIT_STRING_t *asn) {
DevCheck ((asn->size == 1), asn->size, 0, 0);
return asn->buf[0] >> asn->bits_unused;
}
/*! \fn uint16_t BIT_STRING_to_uint16(BIT_STRING_t *)
*\brief This function extract at most a 16 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
*\param[in] pointer to the BIT_STRING_t object.
*\return the extracted value.
*/
static inline uint16_t BIT_STRING_to_uint16(BIT_STRING_t *asn) {
uint16_t result = 0;
int index = 0;
DevCheck ((asn->size > 0) && (asn->size <= 2), asn->size, 0, 0);
switch (asn->size) {
case 2:
result |= asn->buf[index++] << (8 - asn->bits_unused);
case 1:
result |= asn->buf[index] >> asn->bits_unused;
break;
default:
break;
}
return result;
}
/*! \fn uint32_t BIT_STRING_to_uint32(BIT_STRING_t *)
*\brief This function extract at most a 32 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
*\param[in] pointer to the BIT_STRING_t object.
*\return the extracted value.
*/
static inline uint32_t BIT_STRING_to_uint32(BIT_STRING_t *asn) {
uint32_t result = 0;
int index;
int shift;
DevCheck ((asn->size > 0) && (asn->size <= 4), asn->size, 0, 0);
shift = ((asn->size - 1) * 8) - asn->bits_unused;
for (index = 0; index < (asn->size - 1); index++) {
result |= asn->buf[index] << shift;
shift -= 8;
}
result |= asn->buf[index] >> asn->bits_unused;
return result;
}
/*! \fn uint64_t BIT_STRING_to_uint64(BIT_STRING_t *)
*\brief This function extract at most a 64 bits value from a BIT_STRING_t object, the exact bits number depend on the BIT_STRING_t contents.
*\param[in] pointer to the BIT_STRING_t object.
*\return the extracted value.
*/
static inline uint64_t BIT_STRING_to_uint64(BIT_STRING_t *asn) {
uint64_t result = 0;
int index;
int shift;
DevCheck ((asn->size > 0) && (asn->size <= 8), asn->size, 0, 0);
shift = ((asn->size - 1) * 8) - asn->bits_unused;
for (index = 0; index < (asn->size - 1); index++) {
result |= asn->buf[index] << shift;
shift -= 8;
}
result |= asn->buf[index] >> asn->bits_unused;
return result;
}
#endif