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              : #include <lib/support/Span.h>
      24              : 
      25              : namespace mdns {
      26              : namespace Minimal {
      27              : 
      28              : /// Simple range of bytes with a start and an end
      29              : class BytesRange
      30              : {
      31              : public:
      32        14994 :     BytesRange() = default;
      33         7213 :     BytesRange(const uint8_t * start, const uint8_t * end) : mStart(start), mEnd(end)
      34              :     {
      35              :         // negative ranges are not allowed
      36         7213 :         if (mStart > mEnd)
      37              :         {
      38            0 :             mEnd = mStart;
      39              :         }
      40         7213 :     }
      41              : 
      42        28639 :     constexpr const uint8_t * Start() const { return mStart; }
      43           55 :     constexpr const uint8_t * End() const { return mEnd; }
      44              : 
      45       122525 :     bool Contains(const uint8_t * p) const { return ((p >= mStart) && (p < mEnd)); }
      46              : 
      47        11016 :     constexpr size_t Size() const { return static_cast<size_t>(mEnd - mStart); }
      48              : 
      49          109 :     inline static BytesRange BufferWithSize(const void * buff, size_t len)
      50              :     {
      51          109 :         return BytesRange(static_cast<const uint8_t *>(buff), static_cast<const uint8_t *>(buff) + len);
      52              :     }
      53              : 
      54            0 :     chip::ByteSpan AsByteSpan() const { return { mStart, Size() }; }
      55              : 
      56              : private:
      57              :     const uint8_t * mStart = nullptr;
      58              :     const uint8_t * mEnd   = nullptr;
      59              : };
      60              : 
      61              : } // namespace Minimal
      62              : 
      63              : } // namespace mdns