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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* 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
*/
#include "tagTracker.h"
#include "tag.h"
#include "utils.h"
#include "myfprintf.h"
#include "os_compat.h"
#include "directory.h"
struct visited {
struct visited *next;
/**
* this is the original pointer passed to visitInTagTracker(),
* i.e. the caller must not invalidate it until he calls
* resetVisitedFlagsInTagTracker().
*/
const char *value;
} mpd_packed;
static struct visited *visited_heads[TAG_NUM_OF_ITEM_TYPES];
static unsigned num_visited[TAG_NUM_OF_ITEM_TYPES];
static int visit_tag_items(Song *song, void *data)
{
enum tag_type type = (enum tag_type)(size_t)data;
unsigned i;
if (song->tag == NULL)
return 0;
for (i = 0; i < (unsigned)song->tag->numOfItems; ++i) {
const struct tag_item *item = song->tag->items[i];
if (item->type == type)
visitInTagTracker(type, item->value);
}
return 0;
}
int getNumberOfTagItems(int type)
{
int ret;
resetVisitedFlagsInTagTracker(type);
traverseAllIn(NULL, visit_tag_items, NULL, (void*)(size_t)type);
ret = (int)num_visited[type];
resetVisitedFlagsInTagTracker(type);
return ret;
}
void resetVisitedFlagsInTagTracker(int type)
{
while (visited_heads[type] != NULL) {
struct visited *v = visited_heads[type];
visited_heads[type] = v->next;
free(v);
}
num_visited[type] = 0;
}
static struct visited *
find_visit(int type, const char *p)
{
struct visited *v;
for (v = visited_heads[type]; v != NULL; v = v->next)
if (strcmp(v->value, p) == 0)
return v;
return NULL;
}
void visitInTagTracker(int type, const char *str)
{
struct visited *v = find_visit(type, str);
size_t length;
if (v != NULL)
return;
length = strlen(str);
v = xmalloc(sizeof(*v));
v->value = str;
v->next = visited_heads[type];
visited_heads[type] = v;
++num_visited[type];
}
void printVisitedInTagTracker(int fd, int type)
{
struct visited *v;
for (v = visited_heads[type]; v != NULL; v = v->next)
fdprintf(fd,
"%s: %s\n",
mpdTagItemKeys[type],
v->value);
}
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