.. _program_listing_file_common.cc:

Program Listing for File common.cc
==================================

|exhale_lsh| :ref:`Return to documentation for file <file_common.cc>` (``common.cc``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // SPDX-License-Identifier: LGPL-3.0-or-later
   /* common.cc - Common templates and type definitions */
   
   #include <cstddef>
   #include <cstdint>
   #include <algorithm>
   
   #include <libnokogiri/common.hh>
   
   namespace libnokogiri::internal {
       [[nodiscard]]
       capture_compression_t detect_captrue_compression(fd_t& file) {
           constexpr static std::array<uint8_t, 2> gzip_header{0x1FU, 0x8BU};
           std::array<uint8_t, 2> read_bytes{};
           const auto res{file.read<2>(read_bytes)};
           [[maybe_unused]]
           const auto _ = file.head();
   
           if (!res) {
               return capture_compression_t::Unknown;
           }
   
           const auto is_gzip = std::equal(
               gzip_header.begin(), gzip_header.end(),
               read_bytes.begin(), read_bytes.end()
           );
   
           return is_gzip ? capture_compression_t::Compressed : capture_compression_t::Uncompressed;
       }
   }