Line data    Source code

       1             : /*
       2             :  *
       3             :  *    Copyright (c) 2020 Project CHIP Authors
       4             :  *
       5             :  *    Licensed under the Apache License, Version 2.0 (the "License");
       6             :  *    you may not use this file except in compliance with the License.
       7             :  *    You may obtain a copy of the License at
       8             :  *
       9             :  *        http://www.apache.org/licenses/LICENSE-2.0
      10             :  *
      11             :  *    Unless required by applicable law or agreed to in writing, software
      12             :  *    distributed under the License is distributed on an "AS IS" BASIS,
      13             :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      14             :  *    See the License for the specific language governing permissions and
      15             :  *    limitations under the License.
      16             :  */
      17             : 
      18             : #pragma once
      19             : 
      20             : #include <cstddef>
      21             : #include <cstdint>
      22             : 
      23             : namespace mdns {
      24             : namespace Minimal {
      25             : 
      26             : /// Simple range of bytes with a start and an end
      27             : class BytesRange
      28             : {
      29             : public:
      30        6479 :     BytesRange() {}
      31        4743 :     BytesRange(const uint8_t * start, const uint8_t * end) : mStart(start), mEnd(end)
      32             :     {
      33             :         // negative ranges are not allowed
      34        4743 :         if (mStart > mEnd)
      35             :         {
      36           0 :             mEnd = mStart;
      37             :         }
      38        4743 :     }
      39             : 
      40       16626 :     const uint8_t * Start() const { return mStart; }
      41          90 :     const uint8_t * End() const { return mEnd; }
      42             : 
      43      136129 :     bool Contains(const uint8_t * p) const { return ((p >= mStart) && (p < mEnd)); }
      44             : 
      45        6012 :     size_t Size() const { return static_cast<size_t>(mEnd - mStart); }
      46             : 
      47         157 :     inline static BytesRange BufferWithSize(const void * buff, size_t len)
      48             :     {
      49         157 :         return BytesRange(static_cast<const uint8_t *>(buff), static_cast<const uint8_t *>(buff) + len);
      50             :     }
      51             : 
      52             : private:
      53             :     const uint8_t * mStart = nullptr;
      54             :     const uint8_t * mEnd   = nullptr;
      55             : };
      56             : 
      57             : } // namespace Minimal
      58             : 
      59             : } // namespace mdns