/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 * 
 *  Configure Scripting Language
 *
 *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *      * Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *      * 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.
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 *  promote products derived from this software without specific prior
 *  written permission.
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 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 */

#pragma once

#include "libmemcached/csl/common.h"
#include "libmemcached/csl/parser.h"

class Context
{
public:
  Context(const char *option_string, size_t option_string_length, memcached_st *memc_,
          memcached_return_t &rc_arg) :
    previous_token(END),
    scanner(NULL),
    buf(option_string),
    begin(NULL),
    pos(0),
    length(option_string_length),
    memc(memc_),
    rc(rc_arg),
    _is_server(false),
    _end(false),
    _has_hash(false)
  {
    _hostname[0]= 0;
    init_scanner();
    rc= MEMCACHED_SUCCESS;

    memc->state.is_parsing= true;
    memcached_string_create(memc,
                            &_string_buffer,
                            1024);
  }

  bool end()
  {
    return _end;
  }

  void start();

  void set_end()
  {
    rc= MEMCACHED_SUCCESS;
    _end= true;
  }

  bool set_hash(memcached_hash_t hash);

  void set_server()
  {
    _is_server= true;
  }

  void unset_server()
  {
    _is_server= false;
  }

  bool is_server() const
  {
    return _is_server;
  }

  void hostname(const char*, size_t, server_t&);

  bool string_buffer(const char*, size_t, memcached_string_t&);

  const char *hostname() const
  {
    return _hostname;
  }

  void abort(const char *, yytokentype, const char *);
  void error(const char *, yytokentype, const char* );

  ~Context()
  {
    memcached_string_free(&_string_buffer);
    destroy_scanner();
    memc->state.is_parsing= false;
  }

  yytokentype previous_token;
  void *scanner;
  const char *buf;
  const char *begin;
  size_t pos;
  size_t length;
  memcached_st *memc;
  memcached_return_t &rc;

protected:
  void init_scanner();   
  void destroy_scanner();

private:
  bool _is_server;
  bool _end;
  char _hostname[NI_MAXHOST];
  bool _has_hash;
  memcached_string_st _string_buffer;
};