text: #ifndef TARANTOOL_BOX_REQUEST_H_INCLUDED
  #define TARANTOOL_BOX_REQUEST_H_INCLUDED
  /*
   * Copyright 2010-2015, Tarantool AUTHORS, please see AUTHORS file.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * 1. Redistributions of source code must retain the above
   *    copyright notice, this list of conditions and the
   *    following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above
   *    copyright notice, this list of conditions and the following
   *    disclaimer in the documentation and/or other materials
   *    provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   * <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
   * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  #include <stdbool.h>
  #include <stdint.h>
  
  #if defined(__cplusplus)
  extern "C" {
  #endif /* defined(__cplusplus) */
  
  struct txn;
  struct port;
  struct tuple;
  
  /** box statistics */
  extern struct rmean *rmean_box;
  
  struct request
  {
  	/*
  	 * Either log row, or network header, or NULL, depending
  	 * on where this packet originated from: the write ahead
  	 * log/snapshot, client request, or a Lua request.
  	 */
  	struct xrow_header *header;
  	/**
  	 * Request type - IPROTO type code
  	 */
  	uint32_t type;
  	uint32_t space_id;
  	uint32_t index_id;
  	uint32_t offset;
  	uint32_t limit;
  	uint32_t iterator;
  	/** Search key or proc name. */
  	const char *key;
  	const char *key_end;
  	/** Insert/replace/upsert tuple or proc argument or update operations. */
  	const char *tuple;
  	const char *tuple_end;
  	/** Upsert operations. */
  	const char *ops;
  	const char *ops_end;
  	/** Base field offset for UPDATE/UPSERT, e.g. 0 for C and 1 for Lua. */
  	int index_base;
  };
  
  #if defined(__cplusplus)
  } /* extern "C" */
  
  /** The snapshot row metadata repeats the structure of REPLACE request. */
  struct request_replace_body {
  	uint8_t m_body;
  	uint8_t k_space_id;
  	uint8_t m_space_id;
  	uint32_t v_space_id;
  	uint8_t k_tuple;
  } __attribute__((packed));
  
  void
  request_create(struct request *request, uint32_t code);
  
  void
  request_decode(struct request *request, const char *data, uint32_t len);
  
  int
  request_encode(struct request *request, struct iovec *iov);
  
  /**
   * Convert secondary key of request to primary key by given tuple.
   * Also flush iproto header of request to be recontructed in future.
   * @param request - request to fix
   * @param space - space corresponding to request
   * @param found_tuple - tuple found by secondary key
   */
  void
  request_rebind_to_primary_key(struct request *request, struct space *space,
  			      struct tuple *found_tuple);
  
  #endif /* defined(__cplusplus) */
  
  #endif /* TARANTOOL_BOX_REQUEST_H_INCLUDED */
  