text: /****************************************************************************
  **
  ** Copyright (C) 2015 Intel Corporation
  **
  ** Permission is hereby granted, free of charge, to any person obtaining a copy
  ** of this software and associated documentation files (the "Software"), to deal
  ** in the Software without restriction, including without limitation the rights
  ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  ** copies of the Software, and to permit persons to whom the Software is
  ** furnished to do so, subject to the following conditions:
  **
  ** The above copyright notice and this permission notice shall be included in
  ** all copies or substantial portions of the Software.
  **
  ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  ** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  ** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  ** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  ** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  ** THE SOFTWARE.
  **
  ****************************************************************************/
  
  #define _BSD_SOURCE 1
  #include "cbor.h"
  #include "cborconstants_p.h"
  #include "compilersupport_p.h"
  #include <stdlib.h>
  
  static inline uint16_t get16(const uint8_t *ptr)
  {
      uint16_t result;
      memcpy(&result, ptr, sizeof(result));
      return cbor_ntohs(result);
  }
  
  static inline uint32_t get32(const uint8_t *ptr)
  {
      uint32_t result;
      memcpy(&result, ptr, sizeof(result));
      return cbor_ntohl(result);
  }
  
  static inline uint64_t get64(const uint8_t *ptr)
  {
      uint64_t result;
      memcpy(&result, ptr, sizeof(result));
      return cbor_ntohll(result);
  }
  
  static CborError extract_number(const uint8_t **ptr, const uint8_t *end, uint64_t *len)
  {
      uint8_t additional_information = **ptr & SmallValueMask;
      ++*ptr;
      if (additional_information < Value8Bit) {
          *len = additional_information;
          return CborNoError;
      }
      if (unlikely(additional_information > Value64Bit))
          return CborErrorIllegalNumber;
  
      size_t bytesNeeded = 1 << (additional_information - Value8Bit);
      if (unlikely(bytesNeeded > (size_t)(end - *ptr))) {
          return CborErrorUnexpectedEOF;
      } else if (bytesNeeded == 1) {
          *len = (uint8_t)(*ptr)[0];
      } else if (bytesNeeded == 2) {
          *len = get16(*ptr);
      } else if (bytesNeeded == 4) {
          *len = get32(*ptr);
      } else {
          *len = get64(*ptr);
      }
      *ptr += bytesNeeded;
      return CborNoError;
  }
  