song: moved code to song_print.c, song_save.c

Move everything which dumps song information (via tag_print.c) to a
separate source file.  song_print.c gets code which writes song data
to the client; song_save.c is responsible for serializing songs from
the tag cache.

1 files changed, 160 insertions, 0 deletions

diff --git a/src/song_save.c b/src/song_save.c
new file mode 100644
index 000000000..a7b398041
--- /dev/null
+++ b/src/song_save.c
@@ -0,0 +1,160 @@
+/* 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 "song_save.h"
+#include "song_print.h"
+#include "directory.h"
+#include "path.h"
+#include "utils.h"
+#include "tag.h"
+#include "log.h"
+
+#define SONG_KEY	"key: "
+#define SONG_MTIME	"mtime: "
+
+void writeSongInfoFromList(FILE * fp, SongList * list)
+{
+	ListNode *tempNode = list->firstNode;
+
+	fprintf(fp, "%s\n", SONG_BEGIN);
+
+	while (tempNode != NULL) {
+		fprintf(fp, "%s%s\n", SONG_KEY, tempNode->key);
+		fflush(fp);
+		printSongInfo(fileno(fp), (Song *) tempNode->data);
+		fprintf(fp, "%s%li\n", SONG_MTIME,
+			  (long)((Song *) tempNode->data)->mtime);
+		tempNode = tempNode->nextNode;
+	}
+
+	fprintf(fp, "%s\n", SONG_END);
+}
+
+static void insertSongIntoList(SongList * list, ListNode ** nextSongNode,
+			       char *key, Song * song)
+{
+	ListNode *nodeTemp;
+	int cmpRet = 0;
+
+	while (*nextSongNode
+	       && (cmpRet = strcmp(key, (*nextSongNode)->key)) > 0) {
+		nodeTemp = (*nextSongNode)->nextNode;
+		deleteNodeFromList(list, *nextSongNode);
+		*nextSongNode = nodeTemp;
+	}
+
+	if (!(*nextSongNode)) {
+		insertInList(list, song->url, (void *)song);
+	} else if (cmpRet == 0) {
+		Song *tempSong = (Song *) ((*nextSongNode)->data);
+		if (tempSong->mtime != song->mtime) {
+			tag_free(tempSong->tag);
+			tag_end_add(song->tag);
+			tempSong->tag = song->tag;
+			tempSong->mtime = song->mtime;
+			song->tag = NULL;
+		}
+		freeJustSong(song);
+		*nextSongNode = (*nextSongNode)->nextNode;
+	} else {
+		insertInListBeforeNode(list, *nextSongNode, -1, song->url,
+				       (void *)song);
+	}
+}
+
+static int matchesAnMpdTagItemKey(char *buffer, int *itemType)
+{
+	int i;
+
+	for (i = 0; i < TAG_NUM_OF_ITEM_TYPES; i++) {
+		if (0 == strncmp(mpdTagItemKeys[i], buffer,
+				 strlen(mpdTagItemKeys[i]))) {
+			*itemType = i;
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+void readSongInfoIntoList(FILE * fp, SongList * list, Directory * parentDir)
+{
+	char buffer[MPD_PATH_MAX + 1024];
+	int bufferSize = MPD_PATH_MAX + 1024;
+	Song *song = NULL;
+	ListNode *nextSongNode = list->firstNode;
+	ListNode *nodeTemp;
+	int itemType;
+
+	while (myFgets(buffer, bufferSize, fp) && 0 != strcmp(SONG_END, buffer)) {
+		if (0 == strncmp(SONG_KEY, buffer, strlen(SONG_KEY))) {
+			if (song) {
+				insertSongIntoList(list, &nextSongNode,
+						   song->url, song);
+				if (song->tag != NULL)
+					tag_end_add(song->tag);
+			}
+
+			song = newNullSong();
+			song->url = xstrdup(buffer + strlen(SONG_KEY));
+			song->type = SONG_TYPE_FILE;
+			song->parentDir = parentDir;
+		} else if (*buffer == 0) {
+			/* ignore empty lines (starting with '\0') */
+		} else if (song == NULL) {
+			FATAL("Problems reading song info\n");
+		} else if (0 == strncmp(SONG_FILE, buffer, strlen(SONG_FILE))) {
+			/* we don't need this info anymore
+			   song->url = xstrdup(&(buffer[strlen(SONG_FILE)]));
+			 */
+		} else if (matchesAnMpdTagItemKey(buffer, &itemType)) {
+			if (!song->tag) {
+				song->tag = tag_new();
+				tag_begin_add(song->tag);
+			}
+
+			tag_add_item(song->tag, itemType,
+				     &(buffer
+				       [strlen(mpdTagItemKeys[itemType]) +
+					2]));
+		} else if (0 == strncmp(SONG_TIME, buffer, strlen(SONG_TIME))) {
+			if (!song->tag) {
+				song->tag = tag_new();
+				tag_begin_add(song->tag);
+			}
+
+			song->tag->time = atoi(&(buffer[strlen(SONG_TIME)]));
+		} else if (0 == strncmp(SONG_MTIME, buffer, strlen(SONG_MTIME))) {
+			song->mtime = atoi(&(buffer[strlen(SONG_MTIME)]));
+		}
+		else
+			FATAL("songinfo: unknown line in db: %s\n", buffer);
+	}
+
+	if (song) {
+		insertSongIntoList(list, &nextSongNode, song->url, song);
+		if (song->tag != NULL)
+			tag_end_add(song->tag);
+	}
+
+	while (nextSongNode) {
+		nodeTemp = nextSongNode->nextNode;
+		deleteNodeFromList(list, nextSongNode);
+		nextSongNode = nodeTemp;
+	}
+}