input_stream: use "bool" instead of "int"

For boolean values and success flags, use bool instead of integer (1/0
for true/false, 0/-1 for success/failure).

src/decoder/aac_plugin.c

@@ -257,7 +257,7 @@ static float getAacFloatTotalTime(char *file)
 	struct input_stream inStream;
 	long bread;
 
-	if (input_stream_open(&inStream, file) < 0)
+	if (!input_stream_open(&inStream, file))
 		return -1;
 
 	initAacBuffer(&b, NULL, &inStream);
@@ -461,7 +461,7 @@ static int aac_decode(struct decoder * mpd_decoder, char *path)
 	if ((totalTime = getAacFloatTotalTime(path)) < 0)
 		return -1;
 
-	if (input_stream_open(&inStream, path) < 0)
+	if (!input_stream_open(&inStream, path))
 		return -1;
 
 	initAacBuffer(&b, mpd_decoder, &inStream);

src/decoder/ffmpeg_plugin.c

@@ -360,7 +360,7 @@ static struct tag *ffmpeg_tag(char *file)
 	int ret;
 	struct tag *tag = NULL;
 
-	if (input_stream_open(&input, file) < 0) {
+	if (!input_stream_open(&input, file)) {
 		ERROR("failed to open %s\n", file);
 		return NULL;
 	}

src/decoder/flac_plugin.c

@@ -52,9 +52,8 @@ static flac_seek_status flacSeek(mpd_unused const flac_decoder * flacDec,
 {
 	FlacData *data = (FlacData *) fdata;
 
-	if (input_stream_seek(data->inStream, offset, SEEK_SET) < 0) {
+	if (!input_stream_seek(data->inStream, offset, SEEK_SET))
 		return flac_seek_status_error;
-	}
 
 	return flac_seek_status_ok;
 }

src/decoder/mp3_plugin.c

@@ -158,9 +158,8 @@ static void initMp3DecodeData(mp3DecodeData * data, struct decoder *decoder,
 
 static int seekMp3InputBuffer(mp3DecodeData * data, long offset)
 {
-	if (input_stream_seek(data->inStream, offset, SEEK_SET) < 0) {
+	if (!input_stream_seek(data->inStream, offset, SEEK_SET))
 		return -1;
-	}
 
 	mad_stream_buffer(&data->stream, data->readBuffer, 0);
 	(data->stream).error = 0;
@@ -757,7 +756,7 @@ static int getMp3TotalTime(char *file)
 	mp3DecodeData data;
 	int ret;
 
-	if (input_stream_open(&inStream, file) < 0)
+	if (!input_stream_open(&inStream, file))
 		return -1;
 	initMp3DecodeData(&data, NULL, &inStream);
 	if (decodeFirstFrame(&data, NULL, NULL) < 0)

src/decoder/mp4_plugin.c

@@ -75,7 +75,8 @@ static uint32_t mp4_inputStreamReadCallback(void *inStream, void *buffer,
 static uint32_t mp4_inputStreamSeekCallback(void *inStream, uint64_t position)
 {
 	return input_stream_seek((struct input_stream *) inStream,
-			       position, SEEK_SET);
+				 position, SEEK_SET)
+		? 0 : -1;
 }
 
 static int
@@ -317,7 +318,7 @@ static struct tag *mp4DataDup(char *file, int *mp4MetadataFound)
 
 	*mp4MetadataFound = 0;
 
-	if (input_stream_open(&inStream, file) < 0) {
+	if (!input_stream_open(&inStream, file)) {
 		DEBUG("mp4DataDup: Failed to open file: %s\n", file);
 		return NULL;
 	}

src/decoder/mpc_plugin.c

@@ -38,7 +38,7 @@ static mpc_bool_t mpc_seek_cb(void *vdata, mpc_int32_t offset)
 {
 	MpcCallbackData *data = (MpcCallbackData *) vdata;
 
-	return input_stream_seek(data->inStream, offset, SEEK_SET) < 0 ? 0 : 1;
+	return input_stream_seek(data->inStream, offset, SEEK_SET) ? 0 : 1;
 }
 
 static mpc_int32_t mpc_tell_cb(void *vdata)
@@ -260,7 +260,7 @@ static float mpcGetTime(char *file)
 
 	mpc_streaminfo_init(&info);
 
-	if (input_stream_open(&inStream, file) < 0) {
+	if (!input_stream_open(&inStream, file)) {
 		DEBUG("mpcGetTime: Failed to open file: %s\n", file);
 		return -1;
 	}

src/decoder/oggflac_plugin.c

@@ -64,9 +64,8 @@ static OggFLAC__SeekableStreamDecoderSeekStatus of_seek_cb(mpd_unused const
 {
 	FlacData *data = (FlacData *) fdata;
 
-	if (input_stream_seek(data->inStream, offset, SEEK_SET) < 0) {
+	if (!input_stream_seek(data->inStream, offset, SEEK_SET))
 		return OggFLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR;
-	}
 
 	return OggFLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK;
 }
@@ -261,7 +260,7 @@ static struct tag *oggflac_TagDup(char *file)
 	OggFLAC__SeekableStreamDecoder *decoder;
 	FlacData data;
 
-	if (input_stream_open(&inStream, file) < 0)
+	if (!input_stream_open(&inStream, file))
 		return NULL;
 	if (ogg_stream_type_detect(&inStream) != FLAC) {
 		input_stream_close(&inStream);

src/decoder/oggvorbis_plugin.c

@@ -66,7 +66,7 @@ static int ogg_seek_cb(void *vdata, ogg_int64_t offset, int whence)
 	const OggCallbackData *data = (const OggCallbackData *) vdata;
 	if(decoder_get_command(data->decoder) == DECODE_COMMAND_STOP)
 		return -1;
-	return input_stream_seek(data->inStream, offset, whence);
+	return input_stream_seek(data->inStream, offset, whence) ? 0 : -1;
 }
 
 /* TODO: check Ogg libraries API and see if we can just not have this func */

src/decoder/wavpack_plugin.c

@@ -366,12 +366,14 @@ static uint32_t get_pos(void *id)
 
 static int set_pos_abs(void *id, uint32_t pos)
 {
-	return input_stream_seek(((InputStreamPlus *)id)->is, pos, SEEK_SET);
+	return input_stream_seek(((InputStreamPlus *)id)->is, pos, SEEK_SET)
+		? 0 : -1;
 }
 
 static int set_pos_rel(void *id, int32_t delta, int mode)
 {
-	return input_stream_seek(((InputStreamPlus *)id)->is, delta, mode);
+	return input_stream_seek(((InputStreamPlus *)id)->is, delta, mode)
+		? 0 : -1;
 }
 
 static int push_back_byte(void *id, int c)
@@ -439,7 +441,7 @@ static int wavpack_open_wvc(struct decoder *decoder,
 	const char *utf8url;
 	size_t len;
 	char *wvc_url = NULL;
-	int ret;
+	bool ret;
 
 	/*
 	 * As we use dc->utf8url, this function will be bad for
@@ -464,7 +466,7 @@ static int wavpack_open_wvc(struct decoder *decoder,
 	ret = input_stream_open(is_wvc, wvc_url);
 	free(wvc_url);
 
-	if (ret)
+	if (!ret)
 		return 0;
 
 	/*