use the "bool" data type instead of "int"

"bool" should be used in C99 programs for boolean values.

20 files changed, 74 insertions, 65 deletions

diff --git a/src/audio.c b/src/audio.c
index b38c47d7..9022061f 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -204,7 +204,8 @@ void finishAudioDriver(void)
 	audioOutputArraySize = 0;
 }
 
-int isCurrentAudioFormat(const struct audio_format *audioFormat)
+bool
+isCurrentAudioFormat(const struct audio_format *audioFormat)
 {
 	assert(audioFormat != NULL);
 
diff --git a/src/audio.h b/src/audio.h
index f5e89d24..9140afd5 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -19,6 +19,7 @@
 #ifndef AUDIO_H
 #define AUDIO_H
 
+#include <stdbool.h>
 #include <stdio.h>
 
 #define AUDIO_AO_DRIVER_DEFAULT	"default"
@@ -51,7 +52,7 @@ void dropBufferedAudio(void);
 
 void closeAudioDevice(void);
 
-int isCurrentAudioFormat(const struct audio_format *audioFormat);
+bool isCurrentAudioFormat(const struct audio_format *audioFormat);
 
 void sendMetadataToAudioDevice(const struct tag *tag);
 
diff --git a/src/audio_format.h b/src/audio_format.h
index 1c9caee7..794ebaaf 100644
--- a/src/audio_format.h
+++ b/src/audio_format.h
@@ -20,6 +20,7 @@
 #define AUDIO_FORMAT_H
 
 #include <stdint.h>
+#include <stdbool.h>
 
 struct audio_format {
 	uint32_t sampleRate;
@@ -34,13 +35,13 @@ static inline void audio_format_clear(struct audio_format *af)
 	af->channels = 0;
 }
 
-static inline int audio_format_defined(const struct audio_format *af)
+static inline bool audio_format_defined(const struct audio_format *af)
 {
 	return af->sampleRate != 0;
 }
 
-static inline int audio_format_equals(const struct audio_format *a,
-				      const struct audio_format *b)
+static inline bool audio_format_equals(const struct audio_format *a,
+				       const struct audio_format *b)
 {
 	return a->sampleRate == b->sampleRate &&
 		a->bits == b->bits &&
diff --git a/src/decoder_api.c b/src/decoder_api.c
index 8c2d64da..3ce2622a 100644
--- a/src/decoder_api.c
+++ b/src/decoder_api.c
@@ -85,7 +85,7 @@ double decoder_seek_where(mpd_unused struct decoder * decoder)
 {
 	assert(dc.command == DECODE_COMMAND_SEEK);
 
-	decoder->seeking = 1;
+	decoder->seeking = true;
 
 	return dc.seekWhere;
 }
diff --git a/src/decoder_api.h b/src/decoder_api.h
index d5e76f61..d0985f12 100644
--- a/src/decoder_api.h
+++ b/src/decoder_api.h
@@ -33,6 +33,7 @@
 #include "audio_format.h"
 #include "playerData.h"
 
+#include <stdbool.h>
 
 /* valid values for streamTypes in the InputPlugin struct: */
 #define INPUT_PLUGIN_STREAM_FILE	0x01
@@ -65,10 +66,10 @@ struct decoder_plugin {
 	void (*finish)(void);
 
 	/**
-	 * boolean return value, returns 1 if the InputStream is
-	 * decodable by the InputPlugin, 0 if not
+	 * returns true if the InputStream is decodable by the
+	 * InputPlugin, false if not
 	 */
-	unsigned int (*try_decode)(InputStream *);
+	bool (*try_decode)(InputStream *);
 
 	/**
 	 * this will be used to decode InputStreams, and is
diff --git a/src/decoder_internal.h b/src/decoder_internal.h
index 6d8bc7a8..174ca019 100644
--- a/src/decoder_internal.h
+++ b/src/decoder_internal.h
@@ -27,7 +27,7 @@ struct decoder {
 
 	ConvState conv_state;
 
-	int seeking;
+	bool seeking;
 };
 
 #endif
diff --git a/src/decoder_thread.c b/src/decoder_thread.c
index c5a2794c..fd617a6a 100644
--- a/src/decoder_thread.c
+++ b/src/decoder_thread.c
@@ -31,7 +31,7 @@ static void decodeStart(void)
 {
 	struct decoder decoder;
 	int ret;
-	int close_instream = 1;
+	bool close_instream = true;
 	InputStream inStream;
 	struct decoder_plugin *plugin = NULL;
 	char path_max_fs[MPD_PATH_MAX];
@@ -53,7 +53,7 @@ static void decodeStart(void)
 		goto stop_no_close;
 	}
 
-	decoder.seeking = 0;
+	decoder.seeking = false;
 
 	dc.state = DECODE_STATE_START;
 	dc.command = DECODE_COMMAND_NONE;
@@ -137,7 +137,7 @@ static void decodeStart(void)
 
 			if (plugin->file_decode != NULL) {
 				closeInputStream(&inStream);
-				close_instream = 0;
+				close_instream = false;
 				decoder.plugin = plugin;
 				ret = plugin->file_decode(&decoder,
 							  path_max_fs);
diff --git a/src/inputPlugins/flac_plugin.c b/src/inputPlugins/flac_plugin.c
index 0b4fbf27..cd8a8efd 100644
--- a/src/inputPlugins/flac_plugin.c
+++ b/src/inputPlugins/flac_plugin.c
@@ -427,9 +427,9 @@ static int oggflac_decode(struct decoder *decoder, InputStream * inStream)
 	return flac_decode_internal(decoder, inStream, 1);
 }
 
-static unsigned int oggflac_try_decode(InputStream * inStream)
+static bool oggflac_try_decode(InputStream * inStream)
 {
-	return (ogg_stream_type_detect(inStream) == FLAC) ? 1 : 0;
+	return ogg_stream_type_detect(inStream) == FLAC;
 }
 
 static const char *oggflac_suffixes[] = { "ogg", "oga", NULL };
diff --git a/src/inputPlugins/mp4_plugin.c b/src/inputPlugins/mp4_plugin.c
index 1a4c495d..6a2d167b 100644
--- a/src/inputPlugins/mp4_plugin.c
+++ b/src/inputPlugins/mp4_plugin.c
@@ -103,12 +103,12 @@ static int mp4_decode(struct decoder * mpd_decoder, InputStream * inStream)
 	unsigned int initial = 1;
 	float *seekTable;
 	long seekTableEnd = -1;
-	int seekPositionFound = 0;
+	bool seekPositionFound = false;
 	long offset;
 	uint16_t bitRate = 0;
-	int seeking = 0;
+	bool seeking = false;
 	double seek_where = 0;
-	int initialized = 0;
+	bool initialized = false;
 
 	mp4cb = xmalloc(sizeof(mp4ff_callback_t));
 	mp4cb->read = mp4_inputStreamReadCallback;
@@ -189,7 +189,7 @@ static int mp4_decode(struct decoder * mpd_decoder, InputStream * inStream)
 
 	for (sampleId = 0; sampleId < numSamples; sampleId++) {
 		if (decoder_get_command(mpd_decoder) == DECODE_COMMAND_SEEK) {
-			seeking = 1;
+			seeking = true;
 			seek_where = decoder_seek_where(mpd_decoder);
 		}
 
@@ -219,10 +219,10 @@ static int mp4_decode(struct decoder * mpd_decoder, InputStream * inStream)
 		file_time += ((float)dur) / scale;
 
 		if (seeking && file_time > seek_where)
-			seekPositionFound = 1;
+			seekPositionFound = true;
 
 		if (seeking && seekPositionFound) {
-			seekPositionFound = 0;
+			seekPositionFound = false;
 			decoder_clear(mpd_decoder);
 			seeking = 0;
 			decoder_command_finished(mpd_decoder);
@@ -259,7 +259,7 @@ static int mp4_decode(struct decoder * mpd_decoder, InputStream * inStream)
 			audio_format.channels = frameInfo.channels;
 			decoder_initialized(mpd_decoder, &audio_format,
 					    total_time);
-			initialized = 1;
+			initialized = true;
 		}
 
 		if (channels * (unsigned long)(dur + offset) > frameInfo.samples) {
diff --git a/src/inputPlugins/oggflac_plugin.c b/src/inputPlugins/oggflac_plugin.c
index ea36cb82..3a2db5c0 100644
--- a/src/inputPlugins/oggflac_plugin.c
+++ b/src/inputPlugins/oggflac_plugin.c
@@ -283,14 +283,14 @@ static struct tag *oggflac_TagDup(char *file)
 	return data.tag;
 }
 
-static unsigned int oggflac_try_decode(InputStream * inStream)
+static bool oggflac_try_decode(InputStream * inStream)
 {
 	if (!inStream->seekable)
 		/* we cannot seek after the detection, so don't bother
 		   checking */
-		return 1;
+		return true;
 
-	return (ogg_stream_type_detect(inStream) == FLAC) ? 1 : 0;
+	return ogg_stream_type_detect(inStream) == FLAC;
 }
 
 static int oggflac_decode(struct decoder * mpd_decoder, InputStream * inStream)
diff --git a/src/inputPlugins/oggvorbis_plugin.c b/src/inputPlugins/oggvorbis_plugin.c
index a01556cb..0e1d523b 100644
--- a/src/inputPlugins/oggvorbis_plugin.c
+++ b/src/inputPlugins/oggvorbis_plugin.c
@@ -365,14 +365,14 @@ static struct tag *oggvorbis_TagDup(char *file)
 	return ret;
 }
 
-static unsigned int oggvorbis_try_decode(InputStream * inStream)
+static bool oggvorbis_try_decode(InputStream * inStream)
 {
 	if (!inStream->seekable)
 		/* we cannot seek after the detection, so don't bother
 		   checking */
-		return 1;
+		return true;
 
-	return (ogg_stream_type_detect(inStream) == VORBIS) ? 1 : 0;
+	return ogg_stream_type_detect(inStream) == VORBIS;
 }
 
 static const char *oggvorbis_Suffixes[] = { "ogg","oga", NULL };
diff --git a/src/inputPlugins/wavpack_plugin.c b/src/inputPlugins/wavpack_plugin.c
index e98eb736..af7c3a2f 100644
--- a/src/inputPlugins/wavpack_plugin.c
+++ b/src/inputPlugins/wavpack_plugin.c
@@ -417,7 +417,7 @@ initInputStreamPlus(InputStreamPlus *isp, struct decoder *decoder,
 /*
  * Tries to decode the specified stream, and gives true if managed to do it.
  */
-static unsigned int wavpack_trydecode(InputStream *is)
+static bool wavpack_trydecode(InputStream *is)
 {
 	char error[ERRORLEN];
 	WavpackContext *wpc;
@@ -427,13 +427,13 @@ static unsigned int wavpack_trydecode(InputStream *is)
 	wpc = WavpackOpenFileInputEx(&mpd_is_reader, &isp, NULL, error,
 	                             OPEN_STREAMING, 0);
 	if (wpc == NULL)
-		return 0;
+		return false;
 
 	WavpackCloseFile(wpc);
 	/* Seek it back in order to play from the first byte. */
 	seekInputStream(is, 0, SEEK_SET);
 
-	return 1;
+	return true;
 }
 
 static int wavpack_open_wvc(struct decoder *decoder,
diff --git a/src/notify.c b/src/notify.c
index e6bb98bb..7d25db51 100644
--- a/src/notify.c
+++ b/src/notify.c
@@ -31,7 +31,7 @@ void notify_init(struct notify *notify)
 	if (ret != 0)
 		FATAL("pthread_mutex_init() failed");
 
-	notify->pending = 0;
+	notify->pending = false;
 }
 
 void notify_deinit(struct notify *notify)
@@ -45,14 +45,14 @@ void notify_wait(struct notify *notify)
 	pthread_mutex_lock(&notify->mutex);
 	while (!notify->pending)
 		pthread_cond_wait(&notify->cond, &notify->mutex);
-	notify->pending = 0;
+	notify->pending = false;
 	pthread_mutex_unlock(&notify->mutex);
 }
 
 void notify_signal(struct notify *notify)
 {
 	pthread_mutex_lock(&notify->mutex);
-	notify->pending = 1;
+	notify->pending = true;
 	pthread_cond_signal(&notify->cond);
 	pthread_mutex_unlock(&notify->mutex);
 }
diff --git a/src/notify.h b/src/notify.h
index 91140d35..0875eb3c 100644
--- a/src/notify.h
+++ b/src/notify.h
@@ -19,12 +19,13 @@
 #ifndef NOTIFY_H
 #define NOTIFY_H
 
+#include <stdbool.h>
 #include <pthread.h>
 
 struct notify {
 	pthread_mutex_t mutex;
 	pthread_cond_t cond;
-	int pending;
+	bool pending;
 };
 
 #define NOTIFY_INITIALIZER { \
diff --git a/src/outputBuffer.c b/src/outputBuffer.c
index d89dcb30..5a397ac4 100644
--- a/src/outputBuffer.c
+++ b/src/outputBuffer.c
@@ -34,7 +34,7 @@ ob_init(unsigned int size, struct notify *notify)
 	ob.size = size;
 	ob.begin = 0;
 	ob.end = 0;
-	ob.lazy = 0;
+	ob.lazy = false;
 	ob.notify = notify;
 	ob.chunks[0].chunkSize = 0;
 }
@@ -96,7 +96,7 @@ void ob_flush(void)
 	}
 }
 
-void ob_set_lazy(int lazy)
+void ob_set_lazy(bool lazy)
 {
 	ob.lazy = lazy;
 }
diff --git a/src/outputBuffer.h b/src/outputBuffer.h
index 03d15c9d..e1878196 100644
--- a/src/outputBuffer.h
+++ b/src/outputBuffer.h
@@ -22,6 +22,7 @@
 #include "audio_format.h"
 
 #include <stddef.h>
+#include <stdbool.h>
 
 /* pick 1020 since its devisible for 8,16,24, and 32-bit audio */
 #define CHUNK_SIZE		1020
@@ -50,7 +51,7 @@ struct output_buffer {
 
 	/** non-zero if the player thread should only we woken up if
 	    the buffer becomes non-empty */
-	int lazy;
+	bool lazy;
 
 	struct audio_format audioFormat;
 
@@ -74,7 +75,7 @@ void ob_flush(void);
  * previously empty, i.e. when the player thread has really been
  * waiting for us.
  */
-void ob_set_lazy(int lazy);
+void ob_set_lazy(bool lazy);
 
 /** is the buffer empty? */
 int ob_is_empty(void);
diff --git a/src/player_thread.c b/src/player_thread.c
index 0c07778e..a9e594ee 100644
--- a/src/player_thread.c
+++ b/src/player_thread.c
@@ -192,7 +192,7 @@ static void do_play(void)
 	int next = -1;
 
 	ob_clear();
-	ob_set_lazy(0);
+	ob_set_lazy(false);
 
 	dc_start(&pc.notify, pc.next_song);
 	if (waitOnDecode(&decodeWaitedOn) < 0) {
@@ -222,7 +222,7 @@ static void do_play(void)
 			} else {
 				/* buffering is complete */
 				buffering = 0;
-				ob_set_lazy(1);
+				ob_set_lazy(true);
 			}
 		}
 
@@ -314,7 +314,7 @@ static void do_play(void)
 				}
 				nextChunk = ob_absolute(crossFadeChunks);
 				if (nextChunk >= 0) {
-					ob_set_lazy(1);
+					ob_set_lazy(true);
 					cross_fade_apply(beginChunk,
 							 ob_get_chunk(nextChunk),
 							 &(ob.audioFormat),
@@ -331,7 +331,7 @@ static void do_play(void)
 					} else {
 						/* wait for the
 						   decoder */
-						ob_set_lazy(0);
+						ob_set_lazy(false);
 						notify_wait(&pc.notify);
 						continue;
 					}
diff --git a/src/playlist.c b/src/playlist.c
index fe172ebb..402b57ea 100644
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -57,7 +57,7 @@
 #define PLAYLIST_HASH_MULT	4
 
 #define DEFAULT_PLAYLIST_MAX_LENGTH		(1024*16)
-#define DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS	0
+#define DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS	false
 
 static Playlist playlist;
 static int playlist_state = PLAYLIST_STATE_STOP;
@@ -66,7 +66,7 @@ static int playlist_stopOnError;
 static int playlist_errorCount;
 static int playlist_noGoToNext;
 
-int playlist_saveAbsolutePaths = DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS;
+bool playlist_saveAbsolutePaths = DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS;
 
 static void swapOrder(int a, int b);
 static void playPlaylistOrderNumber(int orderNum);
@@ -119,9 +119,9 @@ void initPlaylist(void)
 	ConfigParam *param;
 
 	playlist.length = 0;
-	playlist.repeat = 0;
+	playlist.repeat = false;
 	playlist.version = 1;
-	playlist.random = 0;
+	playlist.random = false;
 	playlist.queued = -1;
 	playlist.current = -1;
 
@@ -329,9 +329,9 @@ void readPlaylistState(FILE *fp)
 			if (strcmp
 			    (&(buffer[strlen(PLAYLIST_STATE_FILE_REPEAT)]),
 			     "1") == 0) {
-				setPlaylistRepeatStatus(1);
+				setPlaylistRepeatStatus(true);
 			} else
-				setPlaylistRepeatStatus(0);
+				setPlaylistRepeatStatus(false);
 		} else if (!prefixcmp(buffer, PLAYLIST_STATE_FILE_CROSSFADE)) {
 			setPlayerCrossFade(atoi
 					   (&
@@ -344,9 +344,9 @@ void readPlaylistState(FILE *fp)
 			     (buffer
 			      [strlen(PLAYLIST_STATE_FILE_RANDOM)]),
 			     "1") == 0) {
-				setPlaylistRandomStatus(1);
+				setPlaylistRandomStatus(true);
 			} else
-				setPlaylistRandomStatus(0);
+				setPlaylistRandomStatus(false);
 		} else if (!prefixcmp(buffer, PLAYLIST_STATE_FILE_CURRENT)) {
 			if (strlen(buffer) ==
 			    strlen(PLAYLIST_STATE_FILE_CURRENT))
@@ -980,17 +980,17 @@ void playPlaylistIfPlayerStopped(void)
 	}
 }
 
-int getPlaylistRepeatStatus(void)
+bool getPlaylistRepeatStatus(void)
 {
 	return playlist.repeat;
 }
 
-int getPlaylistRandomStatus(void)
+bool getPlaylistRandomStatus(void)
 {
 	return playlist.random;
 }
 
-void setPlaylistRepeatStatus(int status)
+void setPlaylistRepeatStatus(bool status)
 {
 	if (playlist_state == PLAYLIST_STATE_PLAY) {
 		if (playlist.repeat && !status && playlist.queued == 0)
@@ -1150,9 +1150,9 @@ static void randomizeOrder(int start, int end)
 	}
 }
 
-void setPlaylistRandomStatus(int status)
+void setPlaylistRandomStatus(bool status)
 {
-	int statusWas = playlist.random;
+	bool statusWas = playlist.random;
 
 	playlist.random = status;
 
diff --git a/src/playlist.h b/src/playlist.h
index a5b340dd..e50f57bc 100644
--- a/src/playlist.h
+++ b/src/playlist.h
@@ -21,6 +21,7 @@
 
 #include "locate.h"
 
+#include <stdbool.h>
 #include <stdio.h>
 
 #define PLAYLIST_FILE_SUFFIX 	"m3u"
@@ -50,12 +51,12 @@ typedef struct _Playlist {
 	int length;
 	int current;
 	int queued;
-	int repeat;
-	int random;
+	bool repeat;
+	bool random;
 	uint32_t version;
 } Playlist;
 
-extern int playlist_saveAbsolutePaths;
+extern bool playlist_saveAbsolutePaths;
 
 extern int playlist_max_length;
 
@@ -119,13 +120,13 @@ enum playlist_result swapSongsInPlaylistById(int id1, int id2);
 
 enum playlist_result loadPlaylist(struct client *client, const char *utf8file);
 
-int getPlaylistRepeatStatus(void);
+bool getPlaylistRepeatStatus(void);
 
-void setPlaylistRepeatStatus(int status);
+void setPlaylistRepeatStatus(bool status);
 
-int getPlaylistRandomStatus(void);
+bool getPlaylistRandomStatus(void);
 
-void setPlaylistRandomStatus(int status);
+void setPlaylistRandomStatus(bool status);
 
 int getPlaylistCurrentSong(void);
 
diff --git a/src/song.h b/src/song.h
index 142ea52f..2510f377 100644
--- a/src/song.h
+++ b/src/song.h
@@ -19,6 +19,8 @@
 #ifndef SONG_H
 #define SONG_H
 
+#include <stddef.h>
+#include <stdbool.h>
 #include <sys/time.h>
 
 #define SONG_BEGIN	"songList begin"
@@ -55,10 +57,10 @@ updateSongInfo(struct song *song);
 char *
 get_song_url(char *path_max_tmp, struct song *song);
 
-static inline int
+static inline bool
 song_is_file(const struct song *song)
 {
-	return !!song->parentDir;
+	return song->parentDir != NULL;
 }
 
 #endif