118 lines
2.8 KiB
C
118 lines
2.8 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "tagTracker.h"
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#include "tag.h"
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#include "utils.h"
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#include "client.h"
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#include "directory.h"
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struct visited {
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struct visited *next;
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/**
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* this is the original pointer passed to visitInTagTracker(),
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* i.e. the caller must not invalidate it until he calls
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* resetVisitedFlagsInTagTracker().
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*/
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const char *value;
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} mpd_packed;
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static struct visited *visited_heads[TAG_NUM_OF_ITEM_TYPES];
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static unsigned num_visited[TAG_NUM_OF_ITEM_TYPES];
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static int visit_tag_items(Song *song, void *data)
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{
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enum tag_type type = (enum tag_type)(size_t)data;
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unsigned i;
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if (song->tag == NULL)
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return 0;
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for (i = 0; i < (unsigned)song->tag->numOfItems; ++i) {
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const struct tag_item *item = song->tag->items[i];
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if (item->type == type)
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visitInTagTracker(type, item->value);
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}
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return 0;
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}
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int getNumberOfTagItems(int type)
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{
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int ret;
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resetVisitedFlagsInTagTracker(type);
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traverseAllIn(NULL, visit_tag_items, NULL, (void*)(size_t)type);
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ret = (int)num_visited[type];
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resetVisitedFlagsInTagTracker(type);
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return ret;
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}
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void resetVisitedFlagsInTagTracker(int type)
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{
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while (visited_heads[type] != NULL) {
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struct visited *v = visited_heads[type];
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visited_heads[type] = v->next;
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free(v);
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}
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num_visited[type] = 0;
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}
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static struct visited *
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find_visit(int type, const char *p)
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{
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struct visited *v;
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for (v = visited_heads[type]; v != NULL; v = v->next)
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if (strcmp(v->value, p) == 0)
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return v;
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return NULL;
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}
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void visitInTagTracker(int type, const char *str)
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{
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struct visited *v = find_visit(type, str);
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size_t length;
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if (v != NULL)
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return;
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length = strlen(str);
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v = xmalloc(sizeof(*v));
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v->value = str;
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v->next = visited_heads[type];
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visited_heads[type] = v;
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++num_visited[type];
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}
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void printVisitedInTagTracker(struct client *client, int type)
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{
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struct visited *v;
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for (v = visited_heads[type]; v != NULL; v = v->next)
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client_printf(client, "%s: %s\n",
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mpdTagItemKeys[type],
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v->value);
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}
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