playlist.h

Yet another mp3 player, but this time using SVGALib under Linux. The idea was to use a 320x240 disp

/* 
  playlist.h  Playlist management class

  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  This program 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
  General Public License for more details, www.gnu.org.

  Copyright (C) 2000  Simon Harrison (email smh@[e-mail])
*/


#ifndef PLAYLIST_DOT_H
#define PLAYLIST_DOT_H

#include <stdio.h>
#include <string.h>

class CListItem {
   char* text;
   int len;
   CListItem* next;
   CListItem();
   public :
   CListItem(char* value);
   ~CListItem() { if (len) delete text; }
   SetNext( CListItem* n ) { next = n; }
   char* GetText () { return len?text:""; }
   CListItem* GetNext() { return next; }
};


class CPlayList {
   CListItem* plist;
   CListItem* ptemp;
   CListItem* ptempprev;
   int Entries;
   bool changed;   // indicate whether the playlist has changed.
   public:
   CPlayList() : plist(NULL),Entries(0),changed(true) { ;}
   ~CPlayList() { while (ChopHead()) { ;} }
   bool NeedsRedraw() {   // find out if the list has changed.
      bool r = changed; 
      changed=false;
      return r; 
   }
   Add( char* text );
   char* GetHead() { return plist?plist->GetText():NULL; }
   int ChopHead();
   DebugWriteOut();
   SetPtrAtIndex( int n ) {  // starting point for quick retrieve
      int t=n;
      ptemp = plist;
      while (t-- && ptemp)
        ptemp = ptemp->GetNext();
   }
   char* GetNext() {  // get next value.
      if (ptemp) {
        CListItem* t;
        t = ptemp;
        ptemp = ptemp->GetNext();
        return t->GetText();
      } else {
        return NULL;
      }
   }
   DeleteAtIndex( int i );   // zero based index.
   int GetEntries() { return Entries; }
   int ReadFromFile( char* fname );
   int WriteToFile( char* fname );
   void Clean();
};


#endif