protocol/ArgParser: overload as ParseCommandArg(), pass references

src/command/OtherCommands.cxx

@@ -309,7 +309,7 @@ CommandResult
 handle_setvol(Client &client, Request args)
 {
 	unsigned level;
-	if (!check_unsigned(client, &level, args.front()))
+	if (!ParseCommandArg(client, level, args.front()))
 		return CommandResult::ERROR;
 
 	if (level > 100) {
@@ -330,7 +330,7 @@ CommandResult
 handle_volume(Client &client, Request args)
 {
 	int relative;
-	if (!check_int(client, &relative, args.front()))
+	if (!ParseCommandArg(client, relative, args.front()))
 		return CommandResult::ERROR;
 
 	if (relative < -100 || relative > 100) {

src/command/OutputCommands.cxx

@@ -34,7 +34,7 @@ handle_enableoutput(Client &client, Request args)
 	assert(args.size == 1);
 
 	unsigned device;
-	if (!check_unsigned(client, &device, args.front()))
+	if (!ParseCommandArg(client, device, args.front()))
 		return CommandResult::ERROR;
 
 	if (!audio_output_enable_index(client.partition.outputs, device)) {
@@ -52,7 +52,7 @@ handle_disableoutput(Client &client, Request args)
 	assert(args.size == 1);
 
 	unsigned device;
-	if (!check_unsigned(client, &device, args.front()))
+	if (!ParseCommandArg(client, device, args.front()))
 		return CommandResult::ERROR;
 
 	if (!audio_output_disable_index(client.partition.outputs, device)) {
@@ -70,7 +70,7 @@ handle_toggleoutput(Client &client, Request args)
 	assert(args.size == 1);
 
 	unsigned device;
-	if (!check_unsigned(client, &device, args.front()))
+	if (!ParseCommandArg(client, device, args.front()))
 		return CommandResult::ERROR;
 
 	if (!audio_output_toggle_index(client.partition.outputs, device)) {

src/command/PlayerCommands.cxx

@@ -61,9 +61,9 @@ CommandResult
 handle_play(Client &client, Request args)
 {
 	int song = -1;
-
-	if (!args.IsEmpty() && !check_int(client, &song, args.front()))
+	if (!args.IsEmpty() && !ParseCommandArg(client, song, args.front()))
 		return CommandResult::ERROR;
+
 	PlaylistResult result = client.partition.PlayPosition(song);
 	return print_playlist_result(client, result);
 }
@@ -72,8 +72,7 @@ CommandResult
 handle_playid(Client &client, Request args)
 {
 	int id = -1;
-
-	if (!args.IsEmpty() && !check_int(client, &id, args.front()))
+	if (!args.IsEmpty() && !ParseCommandArg(client, id, args.front()))
 		return CommandResult::ERROR;
 
 	PlaylistResult result = client.partition.PlayId(id);
@@ -99,7 +98,7 @@ handle_pause(Client &client, Request args)
 {
 	if (!args.IsEmpty()) {
 		bool pause_flag;
-		if (!check_bool(client, &pause_flag, args.front()))
+		if (!ParseCommandArg(client, pause_flag, args.front()))
 			return CommandResult::ERROR;
 
 		client.player_control.SetPause(pause_flag);
@@ -250,7 +249,7 @@ CommandResult
 handle_repeat(Client &client, Request args)
 {
 	bool status;
-	if (!check_bool(client, &status, args.front()))
+	if (!ParseCommandArg(client, status, args.front()))
 		return CommandResult::ERROR;
 
 	client.partition.SetRepeat(status);
@@ -261,7 +260,7 @@ CommandResult
 handle_single(Client &client, Request args)
 {
 	bool status;
-	if (!check_bool(client, &status, args.front()))
+	if (!ParseCommandArg(client, status, args.front()))
 		return CommandResult::ERROR;
 
 	client.partition.SetSingle(status);
@@ -272,7 +271,7 @@ CommandResult
 handle_consume(Client &client, Request args)
 {
 	bool status;
-	if (!check_bool(client, &status, args.front()))
+	if (!ParseCommandArg(client, status, args.front()))
 		return CommandResult::ERROR;
 
 	client.partition.SetConsume(status);
@@ -283,7 +282,7 @@ CommandResult
 handle_random(Client &client, Request args)
 {
 	bool status;
-	if (!check_bool(client, &status, args.front()))
+	if (!ParseCommandArg(client, status, args.front()))
 		return CommandResult::ERROR;
 
 	client.partition.SetRandom(status);
@@ -304,7 +303,7 @@ handle_seek(Client &client, Request args)
 	unsigned song;
 	SongTime seek_time;
 
-	if (!check_unsigned(client, &song, args[0]))
+	if (!ParseCommandArg(client, song, args[0]))
 		return CommandResult::ERROR;
 	if (!ParseCommandArg(client, seek_time, args[1]))
 		return CommandResult::ERROR;
@@ -319,8 +318,7 @@ handle_seekid(Client &client, Request args)
 {
 	unsigned id;
 	SongTime seek_time;
-
-	if (!check_unsigned(client, &id, args[0]))
+	if (!ParseCommandArg(client, id, args[0]))
 		return CommandResult::ERROR;
 	if (!ParseCommandArg(client, seek_time, args[1]))
 		return CommandResult::ERROR;
@@ -348,11 +346,10 @@ CommandResult
 handle_crossfade(Client &client, Request args)
 {
 	unsigned xfade_time;
-
-	if (!check_unsigned(client, &xfade_time, args.front()))
+	if (!ParseCommandArg(client, xfade_time, args.front()))
 		return CommandResult::ERROR;
-	client.player_control.SetCrossFade(xfade_time);
 
+	client.player_control.SetCrossFade(xfade_time);
 	return CommandResult::OK;
 }
 
@@ -360,11 +357,10 @@ CommandResult
 handle_mixrampdb(Client &client, Request args)
 {
 	float db;
-
-	if (!check_float(client, &db, args.front()))
+	if (!ParseCommandArg(client, db, args.front()))
 		return CommandResult::ERROR;
-	client.player_control.SetMixRampDb(db);
 
+	client.player_control.SetMixRampDb(db);
 	return CommandResult::OK;
 }
 
@@ -372,9 +368,9 @@ CommandResult
 handle_mixrampdelay(Client &client, Request args)
 {
 	float delay_secs;
-
-	if (!check_float(client, &delay_secs, args.front()))
+	if (!ParseCommandArg(client, delay_secs, args.front()))
 		return CommandResult::ERROR;
+
 	client.player_control.SetMixRampDelay(delay_secs);
 
 	return CommandResult::OK;

src/command/PlaylistCommands.cxx

@@ -146,8 +146,7 @@ handle_playlistdelete(Client &client, Request args)
 {
 	const char *const name = args[0];
 	unsigned from;
-
-	if (!check_unsigned(client, &from, args[1]))
+	if (!ParseCommandArg(client, from, args[1]))
 		return CommandResult::ERROR;
 
 	Error error;
@@ -161,10 +160,9 @@ handle_playlistmove(Client &client, Request args)
 {
 	const char *const name = args.front();
 	unsigned from, to;
-
-	if (!check_unsigned(client, &from, args[1]))
+	if (!ParseCommandArg(client, from, args[1]))
 		return CommandResult::ERROR;
-	if (!check_unsigned(client, &to, args[2]))
+	if (!ParseCommandArg(client, to, args[2]))
 		return CommandResult::ERROR;
 
 	Error error;

src/command/QueueCommands.cxx

@@ -105,7 +105,7 @@ handle_addid(Client &client, Request args)
 
 	if (args.size == 2) {
 		unsigned to;
-		if (!check_unsigned(client, &to, args[1]))
+		if (!ParseCommandArg(client, to, args[1]))
 			return CommandResult::ERROR;
 		PlaylistResult result = client.partition.MoveId(added_id, to);
 		if (result != PlaylistResult::SUCCESS) {
@@ -155,7 +155,7 @@ CommandResult
 handle_rangeid(Client &client, Request args)
 {
 	unsigned id;
-	if (!check_unsigned(client, &id, args.front()))
+	if (!ParseCommandArg(client, id, args.front()))
 		return CommandResult::ERROR;
 
 	SongTime start, end;
@@ -188,8 +188,7 @@ CommandResult
 handle_deleteid(Client &client, Request args)
 {
 	unsigned id;
-
-	if (!check_unsigned(client, &id, args.front()))
+	if (!ParseCommandArg(client, id, args.front()))
 		return CommandResult::ERROR;
 
 	PlaylistResult result = client.partition.DeleteId(id);
@@ -269,7 +268,7 @@ handle_playlistid(Client &client, Request args)
 {
 	if (!args.IsEmpty()) {
 		unsigned id;
-		if (!check_unsigned(client, &id, args.front()))
+		if (!ParseCommandArg(client, id, args.front()))
 			return CommandResult::ERROR;
 
 		bool ret = playlist_print_id(client, client.playlist, id);
@@ -315,8 +314,7 @@ handle_prio(Client &client, Request args)
 {
 	const char *const priority_string = args.shift();
 	unsigned priority;
-
-	if (!check_unsigned(client, &priority, priority_string))
+	if (!ParseCommandArg(client, priority, priority_string))
 		return CommandResult::ERROR;
 
 	if (priority > 0xff) {
@@ -346,8 +344,7 @@ handle_prioid(Client &client, Request args)
 {
 	const char *const priority_string = args.shift();
 	unsigned priority;
-
-	if (!check_unsigned(client, &priority, priority_string))
+	if (!ParseCommandArg(client, priority, priority_string))
 		return CommandResult::ERROR;
 
 	if (priority > 0xff) {
@@ -358,7 +355,7 @@ handle_prioid(Client &client, Request args)
 
 	for (const char *i : args) {
 		unsigned song_id;
-		if (!check_unsigned(client, &song_id, i))
+		if (!ParseCommandArg(client, song_id, i))
 			return CommandResult::ERROR;
 
 		PlaylistResult result =
@@ -376,9 +373,8 @@ handle_move(Client &client, Request args)
 	RangeArg range;
 	int to;
 
-	if (!ParseCommandArg(client, range, args[0]))
-		return CommandResult::ERROR;
-	if (!check_int(client, &to, args[1]))
+	if (!ParseCommandArg(client, range, args[0]) ||
+	    !ParseCommandArg(client, to, args[1]))
 		return CommandResult::ERROR;
 
 	PlaylistResult result =
@@ -391,11 +387,10 @@ handle_moveid(Client &client, Request args)
 {
 	unsigned id;
 	int to;
-
-	if (!check_unsigned(client, &id, args[0]))
-		return CommandResult::ERROR;
-	if (!check_int(client, &to, args[1]))
+	if (!ParseCommandArg(client, id, args[0]) ||
+	    !ParseCommandArg(client, to, args[1]))
 		return CommandResult::ERROR;
+
 	PlaylistResult result = client.partition.MoveId(id, to);
 	return print_playlist_result(client, result);
 }
@@ -404,10 +399,8 @@ CommandResult
 handle_swap(Client &client, Request args)
 {
 	unsigned song1, song2;
-
-	if (!check_unsigned(client, &song1, args[0]))
-		return CommandResult::ERROR;
-	if (!check_unsigned(client, &song2, args[1]))
+	if (!ParseCommandArg(client, song1, args[0]) ||
+	    !ParseCommandArg(client, song2, args[1]))
 		return CommandResult::ERROR;
 
 	PlaylistResult result =
@@ -419,10 +412,8 @@ CommandResult
 handle_swapid(Client &client, Request args)
 {
 	unsigned id1, id2;
-
-	if (!check_unsigned(client, &id1, args[0]))
-		return CommandResult::ERROR;
-	if (!check_unsigned(client, &id2, args[1]))
+	if (!ParseCommandArg(client, id1, args[0]) ||
+	    !ParseCommandArg(client, id2, args[1]))
 		return CommandResult::ERROR;
 
 	PlaylistResult result = client.partition.SwapIds(id1, id2);

src/command/TagCommands.cxx

@@ -32,7 +32,7 @@ CommandResult
 handle_addtagid(Client &client, Request args)
 {
 	unsigned song_id;
-	if (!check_unsigned(client, &song_id, args.front()))
+	if (!ParseCommandArg(client, song_id, args.front()))
 		return CommandResult::ERROR;
 
 	const char *const tag_name = args[1];
@@ -57,7 +57,7 @@ CommandResult
 handle_cleartagid(Client &client, Request args)
 {
 	unsigned song_id;
-	if (!check_unsigned(client, &song_id, args.front()))
+	if (!ParseCommandArg(client, song_id, args.front()))
 		return CommandResult::ERROR;
 
 	TagType tag_type = TAG_NUM_OF_ITEM_TYPES;

src/protocol/ArgParser.cxx

@@ -41,7 +41,7 @@ check_uint32(Client &client, uint32_t *dst, const char *s)
 }
 
 bool
-check_int(Client &client, int *value_r, const char *s)
+ParseCommandArg(Client &client, int &value_r, const char *s)
 {
 	char *test;
 	long value;
@@ -60,7 +60,7 @@ check_int(Client &client, int *value_r, const char *s)
 		return false;
 	}
 
-	*value_r = (int)value;
+	value_r = (int)value;
 	return true;
 }
 
@@ -131,7 +131,7 @@ ParseCommandArg(Client &client, RangeArg &value_r, const char *s)
 }
 
 bool
-check_unsigned(Client &client, unsigned *value_r, const char *s)
+ParseCommandArg(Client &client, unsigned &value_r, const char *s)
 {
 	unsigned long value;
 	char *endptr;
@@ -149,12 +149,12 @@ check_unsigned(Client &client, unsigned *value_r, const char *s)
 		return false;
 	}
 
-	*value_r = (unsigned)value;
+	value_r = (unsigned)value;
 	return true;
 }
 
 bool
-check_bool(Client &client, bool *value_r, const char *s)
+ParseCommandArg(Client &client, bool &value_r, const char *s)
 {
 	long value;
 	char *endptr;
@@ -166,12 +166,12 @@ check_bool(Client &client, bool *value_r, const char *s)
 		return false;
 	}
 
-	*value_r = !!value;
+	value_r = !!value;
 	return true;
 }
 
 bool
-check_float(Client &client, float *value_r, const char *s)
+ParseCommandArg(Client &client, float &value_r, const char *s)
 {
 	float value;
 	char *endptr;
@@ -183,7 +183,7 @@ check_float(Client &client, float *value_r, const char *s)
 		return false;
 	}
 
-	*value_r = value;
+	value_r = value;
 	return true;
 }
 
@@ -191,7 +191,7 @@ bool
 ParseCommandArg(Client &client, SongTime &value_r, const char *s)
 {
 	float value;
-	bool success = check_float(client, &value, s) && value >= 0;
+	bool success = ParseCommandArg(client, value, s) && value >= 0;
 	if (success)
 		value_r = SongTime::FromS(value);
 
@@ -202,7 +202,7 @@ bool
 ParseCommandArg(Client &client, SignedSongTime &value_r, const char *s)
 {
 	float value;
-	bool success = check_float(client, &value, s);
+	bool success = ParseCommandArg(client, value, s);
 	if (success)
 		value_r = SignedSongTime::FromS(value);
 

src/protocol/ArgParser.hxx

@@ -32,7 +32,7 @@ bool
 check_uint32(Client &client, uint32_t *dst, const char *s);
 
 bool
-check_int(Client &client, int *value_r, const char *s);
+ParseCommandArg(Client &client, int &value_r, const char *s);
 
 struct RangeArg {
 	unsigned start, end;
@@ -47,13 +47,13 @@ bool
 ParseCommandArg(Client &client, RangeArg &value_r, const char *s);
 
 bool
-check_unsigned(Client &client, unsigned *value_r, const char *s);
+ParseCommandArg(Client &client, unsigned &value_r, const char *s);
 
 bool
-check_bool(Client &client, bool *value_r, const char *s);
+ParseCommandArg(Client &client, bool &value_r, const char *s);
 
 bool
-check_float(Client &client, float *value_r, const char *s);
+ParseCommandArg(Client &client, float &value_r, const char *s);
 
 bool
 ParseCommandArg(Client &client, SongTime &value_r, const char *s);