Core/Momiji.Util.h

   1 /*
   2 [momiji music component library]
   3 ---------------------------------------------------------------------
   4 Momiji.Sequencer.Midi.Smf.h
   5         stream component of standard midi file.
   6 ---------------------------------------------------------------------
   7 Copyright (C) 2011 tyiki badwell {miria@users.sourceforge.jp}.
   8
   9 This program is free software: you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation, either version 3 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program.  If not, see <http://www.gnu.org/licenses/gpl-3.0.html>.
  21 ---------------------------------------------------------------------
  22 */
  23 #pragma once
  24
  25 #using <mscorlib.dll>
  26
  27 using namespace System::Runtime;
  28
  29 namespace Momiji{
  30         /**
  31         <remarks>
  32         ユーティリティクラス（未整理ロジック）
  33         </remarks>
  34         */
  35         value class Util
  36         {
  37         public:
  38                 /**
  39                 <summary>
  40                 ntohs
  41                 </summary>
  42                 <param name="data">ビッグエンディアンの２バイトデータ</param>
  43                 <returns>システムがリトルエンディアンであれば、変換して返す。</returns>
  44                 */
  45                 static System::UInt16 ToHostOrder(System::UInt16 data)
  46                 {
  47                         if (System::BitConverter::IsLittleEndian)
  48                         {
  49                                 return safe_cast<System::UInt16>(
  50                                         ((data >> 8) & 0x00FF) |
  51                                         ((data << 8) & 0xFF00)
  52                                         );
  53                         }
  54                         return data;
  55                 };
  56
  57                 /**
  58                 <summary>
  59                 ntohl
  60                 </summary>
  61                 <param name="data">ビッグエンディアンの４バイトデータ</param>
  62                 <returns>システムがリトルエンディアンであれば、変換して返す。</returns>
  63                 */
  64                 static System::UInt32 ToHostOrder(System::UInt32 data)
  65                 {
  66                         if (System::BitConverter::IsLittleEndian)
  67                         {
  68                                 return (
  69                                         ((data >> 24) & 0x000000FFL) |
  70                                         ((data >> 8 ) & 0x0000FF00L) |
  71                                         ((data << 8 ) & 0x00FF0000L) |
  72                                         ((data << 24) & 0xFF000000L)
  73                                         );
  74                         }
  75                         return data;
  76                 };
  77         };
  78
  79 }