diff options
Diffstat (limited to 'kmid/songlist.cpp')
| -rw-r--r-- | kmid/songlist.cpp | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/kmid/songlist.cpp b/kmid/songlist.cpp new file mode 100644 index 00000000..8d98600c --- /dev/null +++ b/kmid/songlist.cpp @@ -0,0 +1,247 @@ +/************************************************************************** + + songlist.cc - class SongList, which holds a list of songs (collection) + Copyright (C) 1997,98 Antonio Larrosa Jimenez + + 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. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + + Send comments and bug fixes to larrosa@kde.org + or to Antonio Larrosa, Rio Arnoya, 10 5B, 29006 Malaga, Spain + +***************************************************************************/ +#include "songlist.h" +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +SongList::SongList(void) +{ + list=NULL; + last=NULL; + active=NULL; + ntotal=0; +} + +SongList::SongList(SongList &src) +{ + list=last=active=NULL; + ntotal=0; + src.iteratorStart(); + while (!src.iteratorAtEnd()) + { + AddSong(src.getIteratorName()); + src.iteratorNext(); + } + if (src.active!=NULL) active=getSongid(src.active->id); +} + +SongList::~SongList() +{ + clean(); + Song *ptr=list; + active=last=NULL; + ntotal=0; + + while (ptr!=NULL) + { + list=ptr->next; + delete ptr->name; + delete ptr; + ptr=list; + } + +} + +SongList::Song *SongList::getSongid(int id) +{ + Song *ptr=list; + while ((ptr!=NULL)&&(ptr->id!=id)) + ptr=ptr->next; + + return ptr; +} + +int SongList::AddSong(const char *song) +{ + if (!song) return 0; + + if (last==NULL) + { + last=new Song; + list=last; + } + else + { + last->next=new Song; + last=last->next; + } + last->name=new char[strlen(song)+1]; + strcpy(last->name,song); + last->id= ++ntotal; + last->next=NULL; + if (active==NULL) active=last; + return last->id; +} + +void SongList::DelSong(int id) +{ + Song *ptr; + + if (list==NULL) return; + if (id==1) + { + if (last->id==1) + { + list=last=active=NULL; + ntotal=0; + } + else + { + ptr=list; + if (active->id==1) active=list->next; + list=list->next; + delete ptr->name; + delete ptr; + ntotal--; + + regenerateid(list,1); + } + return; + } + Song *ptr_prev=getSongid(id-1); + ptr=ptr_prev->next; + if (last->id==id) last=ptr_prev; + if (active->id==id) + if (active->next!=NULL) active=active->next; + else active=ptr_prev; + + ntotal--; + ptr_prev->next=ptr->next; + delete ptr->name; + delete ptr; + regenerateid(ptr_prev->next,id); + +} + +void SongList::regenerateid(Song *song,int id) +{ + Song *tmp=song; + int i=id; + while (tmp!=NULL) + { + tmp->id=i++; + tmp=tmp->next; + } + ntotal=i-1; +} + +void SongList::setActiveSong(int id) +{ + Song *tmp=getSongid(id); + if (tmp!=NULL) active=tmp; +} + +char *SongList::getName(int id) +{ + Song *tmp=getSongid(id); + if (tmp!=NULL) return tmp->name; + return NULL; +} + +/* +void SongList::saveList(FILE *fh) +{ + Song *ptr=list; + while (ptr!=NULL) + { + fputs(fh,ptr->name); + ptr=ptr->next; + } +} +*/ + +void SongList::iteratorStart(void) +{ + it=list; +} + +void SongList::iteratorNext(void) +{ + if (it!=NULL) it=it->next; +} + +int SongList::getIteratorID(void) +{ + if (it==NULL) return -1; + return it->id; +} + +char *SongList::getIteratorName(void) +{ + if (it==NULL) return NULL; + return it->name; +} + + +void SongList::clean(void) +{ + Song *tmp=list; + active=last=NULL; + ntotal=0; + + while (tmp!=NULL) + { + list=tmp->next; + delete [] tmp->name; + delete tmp; + tmp=list; + } +} + +void SongList::copy(SongList &src) +{ + clean(); + src.iteratorStart(); + while (!src.iteratorAtEnd()) + { + AddSong(src.getIteratorName()); + src.iteratorNext(); + } + if (src.active!=NULL) active=getSongid(src.active->id); +} + +int SongList::next(void) +{ + if (list==NULL) {active=NULL;return 0;}; + if (active!=NULL) active=active->next; + if (active==NULL) + { + Song *tmp=list; + while (tmp->next!=NULL) tmp=tmp->next; + active=tmp; + return 0; + } + return 1; +} + + +void SongList::previous(void) +{ + if (list==NULL) {active=NULL;return;}; + Song *tmp=list; + while ((tmp->next!=NULL)&&(tmp->next->id!=active->id)) tmp=tmp->next; + if (tmp->next==NULL) {active=list;return;}; + active=tmp; +} |