text: /*-
   * Public Domain 2014-present MongoDB, Inc.
   * Public Domain 2008-2014 WiredTiger, Inc.
   *
   * This is free and unencumbered software released into the public domain.
   *
   * Anyone is free to copy, modify, publish, use, compile, sell, or
   * distribute this software, either in source code form or as a compiled
   * binary, for any purpose, commercial or non-commercial, and by any
   * means.
   *
   * In jurisdictions that recognize copyright laws, the author or authors
   * of this software dedicate any and all copyright interest in the
   * software to the public domain. We make this dedication for the benefit
   * of the public at large and to the detriment of our heirs and
   * successors. We intend this dedication to be an overt act of
   * relinquishment in perpetuity of all present and future rights to this
   * software under copyright law.
   *
   * 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 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.
   */
  #include "fuzz_util.h"
  
  int LLVMFuzzerTestOneInput(const uint8_t *, size_t);
  
  /*
   * LLVMFuzzerTestOneInput --
   *    A fuzzing target for modifies.
   */
  int
  LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  {
      WT_CURSOR *cursor;
      WT_DECL_ITEM(packed_modify);
      WT_ITEM buf;
      WT_MODIFY modify;
      WT_SESSION_IMPL *session_impl;
  
      /* We can't do anything sensible with small inputs. */
      if (size < 10)
          return (0);
  
      WT_CLEAR(cursor);
      WT_CLEAR(buf);
      WT_CLEAR(modify);
  
      fuzzutil_setup();
      session_impl = (WT_SESSION_IMPL *)fuzz_state.session;
  
      /* Choose some portion of the buffer for the underlying value. */
      buf.data = &data[0];
      buf.size = data[0] % size;
  
      /* The modify data takes the rest. */
      modify.data.data = &data[buf.size];
      modify.data.size = modify.size = size - buf.size;
      modify.offset = data[buf.size] % size;
  
      /* We're doing this in order to get a cursor since we need one to call the modify helper. */
      testutil_check(
        fuzz_state.session->open_cursor(fuzz_state.session, "metadata:", NULL, NULL, &cursor));
      testutil_check(__wt_modify_pack(cursor, &modify, 1, &packed_modify));
      testutil_check(__wt_modify_apply_item(session_impl, "u", &buf, packed_modify->data));
  
      testutil_check(cursor->close(cursor));
      __wt_scr_free(session_impl, &packed_modify);
      __wt_buf_free(session_impl, &buf);
      return (0);
  }
  