text: // Copyright (c) 2020 The XBit Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <test/fuzz/fuzz.h>
  #include <util/asmap.h>
  
  #include <cstdint>
  #include <optional>
  #include <vector>
  
  #include <assert.h>
  
  void test_one_input(const std::vector<uint8_t>& buffer)
  {
      // Encoding: [asmap using 1 bit / byte] 0xFF [addr using 1 bit / byte]
      std::optional<size_t> sep_pos_opt;
      for (size_t pos = 0; pos < buffer.size(); ++pos) {
          uint8_t x = buffer[pos];
          if ((x & 0xFE) == 0) continue;
          if (x == 0xFF) {
              if (sep_pos_opt) return;
              sep_pos_opt = pos;
          } else {
              return;
          }
      }
      if (!sep_pos_opt) return; // Needs exactly 1 separator
      const size_t sep_pos{sep_pos_opt.value()};
      if (buffer.size() - sep_pos - 1 > 128) return; // At most 128 bits in IP address
  
      // Checks on asmap
      std::vector<bool> asmap(buffer.begin(), buffer.begin() + sep_pos);
      if (SanityCheckASMap(asmap, buffer.size() - 1 - sep_pos)) {
          // Verify that for valid asmaps, no prefix (except up to 7 zero padding bits) is valid.
          std::vector<bool> asmap_prefix = asmap;
          while (!asmap_prefix.empty() && asmap_prefix.size() + 7 > asmap.size() && asmap_prefix.back() == false) {
              asmap_prefix.pop_back();
          }
          while (!asmap_prefix.empty()) {
              asmap_prefix.pop_back();
              assert(!SanityCheckASMap(asmap_prefix, buffer.size() - 1 - sep_pos));
          }
          // No address input should trigger assertions in interpreter
          std::vector<bool> addr(buffer.begin() + sep_pos + 1, buffer.end());
          (void)Interpret(asmap, addr);
      }
  }
  