result.h

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/**********************************************************//**
 **
 ** @file result/hdr/result.h
 **
 ** Copyright (C) 2012  Xpace, LLC.  All rights reserved.
 **
 ** www.xpace.net
 **
 **************************************************************/

#ifndef XPACE_RESULT_H
#define XPACE_RESULT_H

#include <vector>

#include "base/types.h"

#include "result/result_c.h"

namespace Xpace
{
  class XPACE_EXPORT TableResult
  {
  public:
    TableResult
      ();

    TableResult
      (const std::vector<String>& colConfigs);

    #if defined(XPACE_TABLE_H)
    TableResult
       (Table* table, 
        const String& query);
    #endif

    byte* alloc
      (size_t len);

    template <typename T>
    void set
      (const T& t);

    void newDoc
      ();

    Xpace_Table_Result get
      ();

  private:
    enum { PAGE_INC = 256 };
    enum { PAGE_SIZE = 65536 };

    Xpace_Result_Page* new_page
      ();

    Xpace_Table_Result result;
  };

  // ==========================================================
  // ==========================================================
  // ==========================================================

  inline
  byte* TableResult::alloc
    (size_t len)
  {
    Xpace_Result_Page* page(&result.pages[result.pageCount - 1]);
    if (page->end + len > PAGE_SIZE)
      page = new_page();
    byte* ret(&page->buf[page->end]);
    page->end += narrow_to<uint>(len);
    return ret;
  }

  template <typename T>
  inline
  void TableResult::set
    (const T& t)
  {
    *reinterpret_cast<T*>(alloc(sizeof(T))) = t;
  }

  inline
  void TableResult::newDoc
    ()
  {
    ++result.docCount;
  }

  inline
  Xpace_Table_Result TableResult::get
    ()
  {
    return result;
  }
}

#endif