commit 3af9396383944c20699d5340bd000f7a5dafb387
from: Omar Polo <op@omarpolo.com>
date: Wed Mar 02 17:54:37 2022 UTC

keep the current song if load input was generated by show -p

`amused show -p' generates a listing in the form of

	  song
	> current song
	  song
	  ...

This adds an heuristic to `amused load' so that the current song can be
set if it's prefixed by "> ".  It's particularly useful when
re-importing the state from a previous run.

commit - 0f5568cbed68c3c871f2ee9b4bbbe63490cc68b5
commit + 3af9396383944c20699d5340bd000f7a5dafb387
blob - a5e417e252642512a12362c2b31c0b987a39e376
blob + 0fd2a5a1bab5c40838c3c37d0b1c2d17b95121b7
--- amused.h
+++ amused.h
@@ -49,7 +49,7 @@ enum imsg_type {
 
 	IMSG_CTL_BEGIN,
 	IMSG_CTL_ADD,		/* path to a file */
-	IMSG_CTL_COMMIT,
+	IMSG_CTL_COMMIT,	/* offset of the track to jump to */
 
 	IMSG_CTL_MONITOR,
 
blob - 05357b0c0efba4aa25477ee8ff32265c2202307a
blob + db7f92c72422e526c6c67aaac8aac5992c4b2692
--- control.c
+++ control.c
@@ -247,7 +247,7 @@ control_dispatch_imsg(int fd, short event, void *bula)
 	struct ctl_conn		*c;
 	struct imsg		 imsg;
 	struct player_repeat	 rp;
-	ssize_t		 	 n;
+	ssize_t		 	 n, off;
 
 	if ((c = control_connbyfd(fd)) == NULL) {
 		log_warnx("%s: fd %d: not found", __func__, fd);
@@ -388,7 +388,12 @@ control_dispatch_imsg(int fd, short event, void *bula)
 				main_senderr(&c->iev, "locked");
 				break;
 			}
-			playlist_swap(&control_state.play);
+			if (IMSG_DATA_SIZE(imsg) != sizeof(off)) {
+				main_senderr(&c->iev, "wrong size");
+				break;
+			}
+			memcpy(&off, imsg.data, sizeof(off));
+			playlist_swap(&control_state.play, off);
 			memset(&control_state.play, 0,
 			    sizeof(control_state.play));
 			control_state.tx = -1;
blob - fb5b2c107489b81822f5ec0d319d0de966cbf8ca
blob + d59f7739bf42943ea1e737d7260b70a88477c0ab
--- ctl.c
+++ ctl.c
@@ -269,9 +269,8 @@ show_load(struct parse_result *res, struct imsg *imsg,
 	const char	*file;
 	char		*line = NULL;
 	char		 path[PATH_MAX];
-	size_t		 linesize = 0;
-	ssize_t		 linelen;
-	int		 any = 0;
+	size_t		 linesize = 0, i = 0;
+	ssize_t		 linelen, curr = -1;
 
 	if (imsg->hdr.type == IMSG_CTL_ERR) {
 		print_error_message("load failed", imsg);
@@ -301,8 +300,10 @@ show_load(struct parse_result *res, struct imsg *imsg,
 			continue;
 		line[linelen-1] = '\0';
 		file = line;
-		if (file[0] == '>' && file[1] == ' ')
+		if (file[0] == '>' && file[1] == ' ') {
 			file += 2;
+			curr = i;
+		}
 		if (file[0] == ' ' && file[1] == ' ')
 			file += 2;
 
@@ -312,7 +313,7 @@ show_load(struct parse_result *res, struct imsg *imsg,
 			continue;
 		}
 
-		any++;
+		i++;
 		imsg_compose(ibuf, IMSG_CTL_ADD, 0, 0, -1,
 		    path, sizeof(path));
 	}
@@ -322,13 +323,13 @@ show_load(struct parse_result *res, struct imsg *imsg,
 		fatal("getline");
 	fclose(f);
 
-	if (!any) {
+	if (i == 0) {
 		*ret = 1;
 		return 1;
 	}
 
 	imsg_compose(ibuf, IMSG_CTL_COMMIT, 0, 0, -1,
-	    NULL, 0);
+	    &curr, sizeof(curr));
 	imsg_flush(ibuf);
 	return 0;
 }
blob - 18d33d2a8c1d5c9f2be9475556fc3ba7578ceba0
blob + b17c51b79025f1f1bce141b64da8b26b5993a123
--- playlist.c
+++ playlist.c
@@ -45,11 +45,14 @@ setsong(ssize_t i)
 }
 
 void
-playlist_swap(struct playlist *p)
+playlist_swap(struct playlist *p, ssize_t off)
 {
 	ssize_t i = -1;
 
-	if (current_song != NULL) {
+	if (off > p->len)
+		off = -1;
+
+	if (current_song != NULL && off < 0) {
 		/* try to adjust play_off to match the same song */
 		for (i = 0; i < p->len; ++i) {
 			if (!strcmp(current_song, p->songs[i]))
@@ -73,6 +76,8 @@ playlist_swap(struct playlist *p)
 
 	if (i != -1)
 		play_off = i;
+	else if (off >= 0)
+		play_off = off;
 
 	playlist.len = p->len;
 	playlist.cap = p->cap;
blob - 996655b0ce47c796db811762bde003c0671313c1
blob + 63b7b13c147f39aef28532cf6b5851e6ff795ce1
--- playlist.h
+++ playlist.h
@@ -37,7 +37,7 @@ extern int		 repeat_all;
 extern ssize_t		 play_off;
 extern const char	*current_song;
 
-void			 playlist_swap(struct playlist *);
+void			 playlist_swap(struct playlist *, ssize_t);
 void			 playlist_push(struct playlist *, const char *);
 void			 playlist_enqueue(const char *);
 const char		*playlist_advance(void);