gearman/libgearman/result.hpp

/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 * 
 *  Gearmand client and server library.
 *
 *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
 *  All rights reserved.
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#pragma once

#include "libgearman/assert.hpp"
#include <cstring>

struct gearman_result_st
{
  bool _is_null;
  enum gearman_result_t type;

  struct Value {
    bool boolean;
    int64_t integer;
    gearman_vector_st string;

    Value() :
      boolean(false),
      integer(0)
    { }

    Value(size_t initial_size) :
      boolean(false),
      integer(0),
      string(initial_size)
    { }

  } value;

  gearman_result_st();

  explicit gearman_result_st(size_t initial_size);

  bool is_null() const
  {
    return _is_null;
  }

  void clear()
  {
    if (type == GEARMAN_RESULT_BINARY)
    {
      value.string.clear();
    }
    else if (type == GEARMAN_RESULT_INTEGER)
    {
      value.integer= 0;
    }

    type= GEARMAN_RESULT_BOOLEAN;
    value.boolean= false;
    _is_null= true;
  }

  gearman_vector_st *mutable_string()
  {
    value.integer= 0;
    value.boolean= false;
    type= GEARMAN_RESULT_BINARY;

    return &value.string;
  }

  const gearman_vector_st *string() const
  {
    if (type == GEARMAN_RESULT_BINARY)
    {
      return &value.string;
    }

    return NULL;
  }

  int64_t integer()
  {
    if (type == GEARMAN_RESULT_INTEGER)
    {
      return value.integer;
    }

    return 0;
  }

  ~gearman_result_st()
  {
    gearman_string_free(&value.string);
  }

private:
  gearman_result_st( const gearman_result_st& );
  const gearman_result_st& operator=( const gearman_result_st& );
};