new feature implementation : goto midi marker

hello,

after a first pass reading the code, i dropped some notes and questions about what to do and where.
As there is no developer docs, i need to understand the global behavior of the program and its specificities.

So the following statements are considered for a first step : parsing the meta events of the SMF file into the meta track of the song structure.

ev.h
	> add a "#DEFINE EV_MARKER 0xValue" > errr… if it must be only 1 byte (char), then there is only 0x01 left, is it usable ?
	> add a #"define marker_val" to struct ev {...} > what value ? v0 or v1 ?
ev.c
	> ev_dbg(…) : add EV_MARKER case
smf.c
	> smf_getvar(…) read a variable length value usefull to get the marker info
	> smf_puttrack : store a track in the smf > add marker events to the meta track ?	
	> song_exportsmf : open the smf and store the whole song >  add marker events to the meta track ?
	> smf_gettrack : parse a track 'varlen event ... ' 
		> THE PLACE TO PARSE THE MARKER EVENTS
		> add statement : else if (type == 0x06) {…} /*marker event*/
song.h
	> add an entry to "struct song" for a marker meta track, or use the meta track ? (the meta track is reffered as "tempo track" in comments)
song.c
	> add a function like : does_song_have_markers(…) ?
	> if any, add marker track initialisation
	> add EV_MARKER case to song_metaput(…) if some action is to be done when a marker is reached
xxxx?
	> add a new proc "lmarkers" to show the list of markers listed in the song's meta track

I'm looking forward to your answers about the meta track and the #define mainly, then if i have not missed big things, this first step should be doable for me.
Raphaël