From c2c34f78dd2b63d27bcbd6f21503bf052cad0655 Mon Sep 17 00:00:00 2001
From: Warren Dukes <warren.dukes@gmail.com>
Date: Sat, 5 Jun 2004 01:14:37 +0000
Subject: new command, plchanges, and also add Num: to songinfo of playlistinfo

git-svn-id: https://svn.musicpd.org/mpd/trunk@1339 09075e82-0dd4-0310-85a5-a0d7c8717e4f
---
 TODO               | 17 ++++------
 src/command.c      | 80 +++++++++++++++++++++++++++-------------------
 src/command.h      |  2 +-
 src/conf.c         |  2 +-
 src/directory.c    |  2 +-
 src/playlist.c     | 93 +++++++++++++++++++++++++++++++++++++++++++-----------
 src/playlist.h     |  5 ++-
 src/sig_handlers.c |  2 +-
 8 files changed, 137 insertions(+), 66 deletions(-)

diff --git a/TODO b/TODO
index 07afd3782..a691790ca 100644
--- a/TODO
+++ b/TODO
@@ -1,20 +1,15 @@
-1) add song# to metadata when printing songs
+1) Parse icymetadata
 
-2) add updated songs command, to output list of updated songs:
-	updatesongs <since-playlist-version>
+2) Put a new metadata entry for icyName for Song's
 
-3) Parse icymetadata
-
-4) Put a new metadata entry for icyName for Song's
-
-5) Add a list_OK options for command_lists, to get a list_OK after each
+3) Add a list_OK options for command_lists, to get a list_OK after each
 	command
 
-6) put some sort of error reporting for streaming/inputStream!
+4) put some sort of error reporting for streaming/inputStream!
 
-7) Fix charset errors so they don't goto stderr/out
+5) Fix charset errors so they don't goto stderr/out
 
-8) Add a timeout for streams (how long? 1 minutes?)
+6) Add a timeout for streams (how long? 1 minutes?)
 
 
 Post-1.0
diff --git a/src/command.c b/src/command.c
index 1252886d8..d87b7786c 100644
--- a/src/command.c
+++ b/src/command.c
@@ -37,43 +37,44 @@
 #include <string.h>
 #include <unistd.h>
 
-#define COMMAND_PLAY            "play"
-#define COMMAND_STOP            "stop"
-#define COMMAND_PAUSE           "pause"
-#define COMMAND_STATUS          "status"
-#define COMMAND_KILL            "kill"
-#define COMMAND_CLOSE           "close"
-#define COMMAND_ADD             "add"
-#define COMMAND_DELETE          "delete"
-#define COMMAND_PLAYLIST        "playlist"
-#define COMMAND_SHUFFLE         "shuffle"
-#define COMMAND_CLEAR           "clear"
-#define COMMAND_SAVE            "save"
-#define COMMAND_LOAD            "load"
-#define COMMAND_LSINFO          "lsinfo"
-#define COMMAND_RM              "rm"
-#define COMMAND_PLAYLISTINFO    "playlistinfo"
-#define COMMAND_FIND            "find"
-#define COMMAND_SEARCH          "search"
-#define COMMAND_UPDATE          "update"
-#define COMMAND_NEXT            "next"
-#define COMMAND_PREVIOUS        "previous"
-#define COMMAND_LISTALL         "listall"
-#define COMMAND_VOLUME          "volume"
-#define COMMAND_REPEAT          "repeat"
-#define COMMAND_RANDOM          "random"
-#define COMMAND_STATS           "stats"
-#define COMMAND_CLEAR_ERROR     "clearerror"
-#define COMMAND_LIST            "list"
-#define COMMAND_MOVE            "move"
-#define COMMAND_SWAP            "swap"
-#define COMMAND_SEEK            "seek"
+#define COMMAND_PLAY           	"play"
+#define COMMAND_STOP           	"stop"
+#define COMMAND_PAUSE          	"pause"
+#define COMMAND_STATUS         	"status"
+#define COMMAND_KILL           	"kill"
+#define COMMAND_CLOSE          	"close"
+#define COMMAND_ADD            	"add"
+#define COMMAND_DELETE         	"delete"
+#define COMMAND_PLAYLIST       	"playlist"
+#define COMMAND_SHUFFLE        	"shuffle"
+#define COMMAND_CLEAR          	"clear"
+#define COMMAND_SAVE           	"save"
+#define COMMAND_LOAD           	"load"
+#define COMMAND_LSINFO         	"lsinfo"
+#define COMMAND_RM             	"rm"
+#define COMMAND_PLAYLISTINFO   	"playlistinfo"
+#define COMMAND_FIND           	"find"
+#define COMMAND_SEARCH         	"search"
+#define COMMAND_UPDATE         	"update"
+#define COMMAND_NEXT           	"next"
+#define COMMAND_PREVIOUS       	"previous"
+#define COMMAND_LISTALL        	"listall"
+#define COMMAND_VOLUME         	"volume"
+#define COMMAND_REPEAT         	"repeat"
+#define COMMAND_RANDOM         	"random"
+#define COMMAND_STATS          	"stats"
+#define COMMAND_CLEAR_ERROR    	"clearerror"
+#define COMMAND_LIST           	"list"
+#define COMMAND_MOVE           	"move"
+#define COMMAND_SWAP           	"swap"
+#define COMMAND_SEEK           	"seek"
 #define COMMAND_LISTALLINFO	"listallinfo"
 #define COMMAND_PING		"ping"
 #define COMMAND_SETVOL		"setvol"
 #define COMMAND_PASSWORD	"password"
 #define COMMAND_CROSSFADE	"crossfade"
-#define COMMAND_URL_HANDLERS    "urlhandlers" 
+#define COMMAND_URL_HANDLERS   	"urlhandlers" 
+#define COMMAND_PLCHANGES	"plchanges" 
 
 #define COMMAND_STATUS_VOLUME           "volume"
 #define COMMAND_STATUS_STATE            "state"
@@ -322,6 +323,20 @@ int handleRm(FILE * fp, unsigned int * permission, int argArrayLength,
         return deletePlaylist(fp,argArray[1]);
 }
 
+int handlePlaylistChanges(FILE * fp, unsigned int * permission, 
+		int argArrayLength, char ** argArray) 
+{
+        unsigned long version;
+        char * test;
+
+        version = strtoul(argArray[1], &test, 10);
+        if(*test!='\0') {
+                commandError(fp, ACK_ERROR_ARG, "need a positive integer");
+                return -1;
+        }
+        return playlistChanges(fp, version);
+}
+
 int handlePlaylistInfo(FILE * fp, unsigned int * permission, 
 		int argArrayLength, char ** argArray) 
 {
@@ -641,6 +656,7 @@ void initCommands() {
         addCommand(COMMAND_PASSWORD    ,0,                  1, 1,handlePassword,NULL);
         addCommand(COMMAND_CROSSFADE   ,PERMISSION_CONTROL, 1, 1,handleCrossfade,NULL);
         addCommand(COMMAND_URL_HANDLERS,PERMISSION_READ,    0, 0,handleUrlHandlers,NULL);
+        addCommand(COMMAND_PLCHANGES   ,PERMISSION_READ,    1, 1,handlePlaylistChanges,NULL);
 
         sortList(commandList);
 }
diff --git a/src/command.h b/src/command.h
index 85a3683a4..59f6e433f 100644
--- a/src/command.h
+++ b/src/command.h
@@ -54,7 +54,7 @@ void finishCommands();
 			current_command = NULL; \
 		} \
 		else { \
-			myfprintf(fp, "ACK [%i@%i] " format "\n", \
+			myfprintf(stderr, "ACK [%i@%i] " format "\n", \
 					(int)error, command_listNum, \
 					##__VA_ARGS__); \
 		} \
diff --git a/src/conf.c b/src/conf.c
index c9050b8b0..ff38030a5 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -69,7 +69,7 @@
 #endif
 #endif
 
-char * conf_params[CONF_NUMBER_OF_PARAMS];
+static char * conf_params[CONF_NUMBER_OF_PARAMS];
 
 void initConf() {
 	int i;
diff --git a/src/directory.c b/src/directory.c
index 653cdb15f..959ade487 100644
--- a/src/directory.c
+++ b/src/directory.c
@@ -159,7 +159,7 @@ void readDirectoryDBIfUpdateIsFinished() {
 	if(directory_reReadDB && 0==directory_updatePid) {
 		DEBUG("readDirectoryDB since update finished successfully\n");
 		readDirectoryDB();
-		incrPlaylistVersion();
+		playlistVersionChange();
 		directory_reReadDB = 0;
 	}
 }
diff --git a/src/playlist.c b/src/playlist.c
index c7da3fa38..dd261cfd2 100644
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -36,8 +36,6 @@
 #include <unistd.h>
 #include <time.h>
 
-#define BITS_FOR_VERSION	31
-
 #define PLAYLIST_COMMENT	'#'
 
 #define PLAYLIST_STATE_STOP		0
@@ -62,13 +60,15 @@
 
 typedef struct _Playlist {
 	Song ** songs;
+	/* holds version a song was modified on */
+	mpd_uint32 * songMod;
 	int * order;
 	int length;
 	int current;
 	int queued;
 	int repeat;
 	int random;
-	unsigned long version;
+	mpd_uint32 version;
 } Playlist;
 
 static Playlist playlist;
@@ -87,10 +87,28 @@ static void swapOrder(int a, int b);
 static int playPlaylistOrderNumber(FILE * fp, int orderNum);
 static void randomizeOrder(int start, int end);
 
-void incrPlaylistVersion() {
-	static unsigned long max = ((unsigned long)1<<BITS_FOR_VERSION)-1;
+static void incrPlaylistVersion() {
+	static unsigned long max = ((mpd_uint32)1<<31)-1;
 	playlist.version++;
-	if(playlist.version>=max) playlist.version = 0;
+	if(playlist.version>=max) {
+		int i;
+
+		for(i=0; i<playlist.length; i++) {
+			playlist.songMod[i] = 0;
+		}
+
+		playlist.version = 1;
+	}
+}
+
+void playlistVersionChange() {
+	int i = 0;
+
+	for(i=0; i<playlist.length; i++) {
+		playlist.songMod[i] = playlist.version;
+	}
+
+	incrPlaylistVersion();
 }
 
 static void incrPlaylistCurrent() {
@@ -108,7 +126,7 @@ void initPlaylist() {
 
 	playlist.length = 0;
 	playlist.repeat = 0;
-	playlist.version = 0;
+	playlist.version = 1;
 	playlist.random = 0;
 	playlist.queued = -1;
         playlist.current = -1;
@@ -136,7 +154,8 @@ void initPlaylist() {
 	}
 
 	playlist.songs = malloc(sizeof(Song *)*playlist_max_length);
-	playlist.order = malloc(sizeof(Song *)*playlist_max_length);
+	playlist.songMod = malloc(sizeof(mpd_uint32)*playlist_max_length);
+	playlist.order = malloc(sizeof(int)*playlist_max_length);
 
 	memset(playlist.songs,0,sizeof(char *)*playlist_max_length);
 
@@ -155,8 +174,13 @@ void finishPlaylist() {
 			freeJustSong(playlist.songs[i]);
 		}
         }
+
+	playlist.length = 0;
+
 	free(playlist.songs);
 	playlist.songs = NULL;
+	free(playlist.songMod);
+	playlist.songMod = NULL;
 	free(playlist.order);
 	playlist.order = NULL;
 }
@@ -364,8 +388,32 @@ void readPlaylistState() {
 	}
 }
 
-int playlistInfo(FILE * fp,int song) {
+void printPlaylistSongInfo(FILE * fp, int song) {
 	MpdTag * tag;
+	
+	myfprintf(fp, "file: %s\n", (playlist.songs[song])->utf8url);
+	if((tag = (playlist.songs[song])->tag)) {
+		printMpdTag(fp, tag);
+	}
+	myfprintf(fp, "Num: %i\n", song);
+}
+
+int playlistChanges(FILE * fp, mpd_uint32 version) {
+	int i;
+	
+	for(i=0; i<playlist.length; i++) {
+		if(version > playlist.version ||
+				playlist.songMod[i] >= version ||
+				playlist.songMod[i] == 0)
+		{
+			printPlaylistSongInfo(fp, i);
+		}
+	}
+
+	return 0;
+}
+
+int playlistInfo(FILE * fp, int song) {
 	int i;
 	int begin = 0;
 	int end = playlist.length;
@@ -380,12 +428,7 @@ int playlistInfo(FILE * fp,int song) {
 		return -1;
 	}
 
-	for(i=begin;i<end;i++) {
-		myfprintf(fp,"file: %s\n",(playlist.songs[i])->utf8url);
-		if((tag = (playlist.songs[i])->tag)) {
-			printMpdTag(fp,tag);
-		}
-	} 
+	for(i=begin; i<end; i++) printPlaylistSongInfo(fp, i);
 
 	return 0;
 }
@@ -396,6 +439,8 @@ void swapSongs(int song1, int song2) {
 	temp = playlist.songs[song1];
 	playlist.songs[song1] = playlist.songs[song2];
 	playlist.songs[song2] = temp;
+	playlist.songMod[song1] = playlist.version;
+	playlist.songMod[song2] = playlist.version;
 }
 
 void queueNextSongInPlaylist() {
@@ -512,6 +557,7 @@ int addSongToPlaylist(FILE * fp, Song * song) {
 	}
 
 	playlist.songs[playlist.length] = song;
+	playlist.songMod[playlist.length] = playlist.version;
 	playlist.order[playlist.length] = playlist.length;
 	playlist.length++;
 
@@ -613,6 +659,7 @@ int deleteFromPlaylist(FILE * fp, int song) {
 	/* delete song from songs array */
 	for(i=song;i<playlist.length-1;i++) {
 		playlist.songs[i] = playlist.songs[i+1];
+		playlist.songMod[i] = playlist.version;
 	}
 	/* now find it in the order array */
 	for(i=0;i<playlist.length-1;i++) {
@@ -746,12 +793,14 @@ int playPlaylist(FILE * fp, int song, int stopOnError) {
 void syncCurrentPlayerDecodeMetadata() {
         Song * songPlayer = playerCurrentDecodeSong();
         Song * song;
+	int songNum;
 
         if(!songPlayer) return;
 
 	if(playlist_state!=PLAYLIST_STATE_PLAY) return;
 
-        song = playlist.songs[playlist.order[playlist.current]];
+	songNum = playlist.order[playlist.current];
+        song = playlist.songs[songNum];
 
         if(song->type == SONG_TYPE_URL &&
                         0 == strcmp(song->utf8url, songPlayer->utf8url) &&
@@ -759,6 +808,7 @@ void syncCurrentPlayerDecodeMetadata() {
         {
                 if(song->tag) freeMpdTag(song->tag);
                 song->tag = mpdTagDup(songPlayer->tag);
+		playlist.songMod[songNum] = playlist.version;
                 incrPlaylistVersion();
         }
 }
@@ -891,11 +941,18 @@ int moveSongInPlaylist(FILE * fp, int from, int to) {
 
 	tmpSong = playlist.songs[from];
 	/* move songs to one less in from->to */
-	for(i=from;i<to;i++) playlist.songs[i] = playlist.songs[i+1];
+	for(i=from;i<to;i++) {
+		playlist.songs[i] = playlist.songs[i+1];
+		playlist.songMod[i] = playlist.version;
+	}
 	/* move songs to one more in to->from */
-	for(i=from;i>to;i--) playlist.songs[i] = playlist.songs[i-1];
+	for(i=from;i>to;i--) {
+		playlist.songs[i] = playlist.songs[i-1];
+		playlist.songMod[i] = playlist.version;
+	}
 	/* put song at _to_ */
 	playlist.songs[to] = tmpSong;
+	playlist.songMod[to] = playlist.version;
 	/* now deal with order */
 	if(playlist.random) {
 		for(i=0;i<playlist.length;i++) {
diff --git a/src/playlist.h b/src/playlist.h
index a9eee9a17..0281b6bfe 100644
--- a/src/playlist.h
+++ b/src/playlist.h
@@ -22,6 +22,7 @@
 #include "../config.h"
 
 #include "song.h"
+#include "mpd_types.h"
 
 #include <stdio.h>
 #include <sys/param.h>
@@ -93,7 +94,9 @@ void playPlaylistIfPlayerStopped();
 
 int seekSongInPlaylist(FILE * fp, int song, float time);
 
-void incrPlaylistVersion();
+void playlistVersionChange();
+
+int playlistChanges(FILE * fp, mpd_uint32 version);
 
 #endif
 /* vim:set shiftwidth=4 tabstop=8 expandtab: */
diff --git a/src/sig_handlers.c b/src/sig_handlers.c
index 33d3065ea..84243bf45 100644
--- a/src/sig_handlers.c
+++ b/src/sig_handlers.c
@@ -44,7 +44,7 @@ int handlePendingSignals() {
 		signal_clear(SIGHUP);
 		if(!isUpdatingDB()) {
                         readDirectoryDB();
-		        incrPlaylistVersion();
+		        playlistVersionChange();
                 }
                 if(myfprintfCloseAndOpenLogFile()<0) return COMMAND_RETURN_KILL;
                 playerCycleLogFiles();
-- 
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