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authorMax Kellermann <max@duempel.org>2013-01-03 21:21:01 +0100
committerMax Kellermann <max@duempel.org>2013-01-03 21:58:20 +0100
commit9761abf3b5726cf3870ce4cb36e47c86ac8cee86 (patch)
tree398599ed70f3cc68e5f9f4f52573015b756290b2 /src/cue
parent599a56217054c139108076725d570a58782f9ce6 (diff)
downloadmpd-9761abf3b5726cf3870ce4cb36e47c86ac8cee86.tar.gz
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cue_parser: fix CUE files with only one track
Track whether _finish() has been called, and deliver all partial results then. Fixes Mantis ticket 0003621.
Diffstat (limited to 'src/cue')
-rw-r--r--src/cue/cue_parser.c54
1 files changed, 47 insertions, 7 deletions
diff --git a/src/cue/cue_parser.c b/src/cue/cue_parser.c
index 4031d6c42..9ccc3bcdd 100644
--- a/src/cue/cue_parser.c
+++ b/src/cue/cue_parser.c
@@ -80,6 +80,13 @@ struct cue_parser {
* start time of the current song.
*/
bool last_updated;
+
+ /**
+ * Tracks whether cue_parser_finish() has been called. If
+ * true, then all remaining (partial) results will be
+ * delivered by cue_parser_get().
+ */
+ bool end;
};
struct cue_parser *
@@ -92,6 +99,7 @@ cue_parser_new(void)
parser->current = NULL;
parser->previous = NULL;
parser->finished = NULL;
+ parser->end = false;
return parser;
}
@@ -223,10 +231,32 @@ cue_parse_position(const char *p)
return minutes * 60000 + seconds * 1000 + frames * 1000 / 75;
}
+/**
+ * Commit the current song. It will be moved to "previous", so the
+ * next song may soon edit its end time (using the next song's start
+ * time).
+ */
+static void
+cue_parser_commit(struct cue_parser *parser)
+{
+ /* the caller of this library must call cue_parser_get() often
+ enough */
+ assert(parser->finished == NULL);
+ assert(!parser->end);
+
+ if (parser->current == NULL)
+ return;
+
+ parser->finished = parser->previous;
+ parser->previous = parser->current;
+ parser->current = NULL;
+}
+
static void
cue_parser_feed2(struct cue_parser *parser, char *p)
{
assert(parser != NULL);
+ assert(!parser->end);
assert(p != NULL);
const char *command = cue_next_token(&p);
@@ -257,7 +287,7 @@ cue_parser_feed2(struct cue_parser *parser, char *p)
else if (parser->state == TRACK)
cue_add_tag(parser->current->tag, TAG_TITLE, p);
} else if (strcmp(command, "FILE") == 0) {
- cue_parser_finish(parser);
+ cue_parser_commit(parser);
const char *filename = cue_next_value(&p);
if (filename == NULL)
@@ -280,7 +310,7 @@ cue_parser_feed2(struct cue_parser *parser, char *p)
} else if (parser->state == IGNORE_FILE) {
return;
} else if (strcmp(command, "TRACK") == 0) {
- cue_parser_finish(parser);
+ cue_parser_commit(parser);
const char *nr = cue_next_token(&p);
if (nr == NULL)
@@ -332,6 +362,7 @@ void
cue_parser_feed(struct cue_parser *parser, const char *line)
{
assert(parser != NULL);
+ assert(!parser->end);
assert(line != NULL);
char *allocated = g_strdup(line);
@@ -342,12 +373,12 @@ cue_parser_feed(struct cue_parser *parser, const char *line)
void
cue_parser_finish(struct cue_parser *parser)
{
- if (parser->finished != NULL)
- song_free(parser->finished);
+ if (parser->end)
+ /* has already been called, ignore */
+ return;
- parser->finished = parser->previous;
- parser->previous = parser->current;
- parser->current = NULL;
+ cue_parser_commit(parser);
+ parser->end = true;
}
struct song *
@@ -355,6 +386,15 @@ cue_parser_get(struct cue_parser *parser)
{
assert(parser != NULL);
+ if (parser->finished == NULL && parser->end) {
+ /* cue_parser_finish() has been called already:
+ deliver all remaining (partial) results */
+ assert(parser->current == NULL);
+
+ parser->finished = parser->previous;
+ parser->previous = NULL;
+ }
+
struct song *song = parser->finished;
parser->finished = NULL;
return song;