utils.h

来自「FreeAMP(MP3播放)程序源代码-用来研究MP3解码」· C头文件 代码 · 共 103 行

// -*- C++ -*-
// $Id: utils.h,v 1.2 2001/01/16 21:08:01 robert Exp $

// id3lib: a C++ library for creating and manipulating id3v1/v2 tags
// Copyright 1999, 2000  Scott Thomas Haug

// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
// License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

// The id3lib authors encourage improvements and optimisations to be sent to
// the id3lib coordinator.  Please see the README file for details on where to
// send such submissions.  See the AUTHORS file for a list of people who have
// contributed to id3lib.  See the ChangeLog file for a list of changes to
// id3lib.  These files are distributed with id3lib at
// http://download.sourceforge.net/id3lib/

#ifndef _ID3LIB_UTILS_H_
#define _ID3LIB_UTILS_H_

#if defined HAVE_CONFIG_H
#include <config.h>
#endif

#include <fstream.h>
#include "globals.h"
#include "strings.h"

namespace dami
{
#ifdef  MAXPATHLEN
#  define ID3_PATH_LENGTH   (MAXPATHLEN + 1)
#elif   defined (PATH_MAX)
#  define ID3_PATH_LENGTH   (PATH_MAX + 1)
#else   /* !MAXPATHLEN */
#  define ID3_PATH_LENGTH   (2048 + 1)
#endif  /* !MAXPATHLEN && !PATH_MAX */

#ifndef min
  template <class T>
  const T& min(const T& a, const T& b)
  {
    return (a < b) ? a : b;
  }
#endif

#ifndef max
  template<class T>
  const T& max(const T& a, const T& b)
  {
    return (b < a) ? a : b;
  }
#endif

#ifndef mid
  template<class T>
  const T& mid(const T& lo, const T& mid, const T& hi)
  {
    return max(lo, min(mid, hi));
  }
#endif

#ifndef abs
  template<class T>
  T abs(const T& a)
  {
    return (a < T(0)) ? -a : a;
  }
#endif

  size_t renderNumber(uchar *buffer, uint32 val, size_t size = sizeof(uint32));
  String renderNumber(uint32 val, size_t size = sizeof(uint32));

  String toString(uint32 val);
  WString toWString(const unicode_t[], size_t);
  
  size_t ucslen(const unicode_t *unicode);
  String convert(String data, ID3_TextEnc, ID3_TextEnc);

  // file utils
  size_t getFileSize(fstream&);
  size_t getFileSize(ifstream&);
  size_t getFileSize(ofstream&);
  ID3_Err createFile(String, fstream&);
  ID3_Err openWritableFile(String, fstream&);
  ID3_Err openWritableFile(String, ofstream&);
  ID3_Err openReadableFile(String, fstream&);
  ID3_Err openReadableFile(String, ifstream&);

};
  
#endif /* _ID3LIB_UTILS_H_ */