*: use nullptr instead of NULL

src/decoder/AdPlugDecoderPlugin.cxx

@@ -72,7 +72,7 @@ adplug_file_decode(Decoder &decoder, const char *path_fs)
 			break;
 
 		opl.update(buffer, frames_per_buffer);
-		cmd = decoder_data(decoder, NULL,
+		cmd = decoder_data(decoder, nullptr,
 				   buffer, sizeof(buffer),
 				   0);
 	} while (cmd == DecoderCommand::NONE);

src/decoder/DsfDecoderPlugin.cxx

@@ -314,7 +314,7 @@ dsf_scan_stream(InputStream &is,
 {
 	/* check DSF metadata */
 	DsfMetaData metadata;
-	if (!dsf_read_metadata(NULL, is, &metadata))
+	if (!dsf_read_metadata(nullptr, is, &metadata))
 		return false;
 
 	AudioFormat audio_format;
@@ -338,12 +338,12 @@ dsf_scan_stream(InputStream &is,
 
 static const char *const dsf_suffixes[] = {
 	"dsf",
-	NULL
+	nullptr
 };
 
 static const char *const dsf_mime_types[] = {
 	"application/x-dsf",
-	NULL
+	nullptr
 };
 
 const struct DecoderPlugin dsf_decoder_plugin = {

src/decoder/FfmpegMetaData.cxx

@@ -32,7 +32,7 @@ static const struct tag_table ffmpeg_tags[] = {
 	{ "album_artist-sort", TAG_ALBUM_ARTIST_SORT },
 
 	/* sentinel */
-	{ NULL, TAG_NUM_OF_ITEM_TYPES }
+	{ nullptr, TAG_NUM_OF_ITEM_TYPES }
 };
 
 static void
@@ -40,9 +40,9 @@ ffmpeg_copy_metadata(TagType type,
 		     AVDictionary *m, const char *name,
 		     const struct tag_handler *handler, void *handler_ctx)
 {
-	AVDictionaryEntry *mt = NULL;
+	AVDictionaryEntry *mt = nullptr;
 
-	while ((mt = av_dict_get(m, name, mt, 0)) != NULL)
+	while ((mt = av_dict_get(m, name, mt, 0)) != nullptr)
 		tag_handler_invoke_tag(handler, handler_ctx,
 				       type, mt->value);
 }
@@ -51,9 +51,9 @@ static void
 ffmpeg_scan_pairs(AVDictionary *dict,
 		  const struct tag_handler *handler, void *handler_ctx)
 {
-	AVDictionaryEntry *i = NULL;
+	AVDictionaryEntry *i = nullptr;
 
-	while ((i = av_dict_get(dict, "", i, AV_DICT_IGNORE_SUFFIX)) != NULL)
+	while ((i = av_dict_get(dict, "", i, AV_DICT_IGNORE_SUFFIX)) != nullptr)
 		tag_handler_invoke_pair(handler, handler_ctx,
 					i->key, i->value);
 }
@@ -67,10 +67,10 @@ ffmpeg_scan_dictionary(AVDictionary *dict,
 				     handler, handler_ctx);
 
 	for (const struct tag_table *i = ffmpeg_tags;
-	     i->name != NULL; ++i)
+	     i->name != nullptr; ++i)
 		ffmpeg_copy_metadata(i->type, dict, i->name,
 				     handler, handler_ctx);
 
-	if (handler->pair != NULL)
+	if (handler->pair != nullptr)
 		ffmpeg_scan_pairs(dict, handler, handler_ctx);
 }

src/decoder/VorbisComments.cxx

@@ -43,7 +43,7 @@ vorbis_comment_value(const char *comment, const char *needle)
 	    comment[len] == '=')
 		return comment + len + 1;
 
-	return NULL;
+	return nullptr;
 }
 
 bool
@@ -91,7 +91,7 @@ vorbis_copy_comment(const char *comment,
 	const char *value;
 
 	value = vorbis_comment_value(comment, name);
-	if (value != NULL) {
+	if (value != nullptr) {
 		tag_handler_invoke_tag(handler, handler_ctx, tag_type, value);
 		return true;
 	}
@@ -103,11 +103,11 @@ static void
 vorbis_scan_comment(const char *comment,
 		    const struct tag_handler *handler, void *handler_ctx)
 {
-	if (handler->pair != NULL) {
+	if (handler->pair != nullptr) {
 		char *name = g_strdup((const char*)comment);
 		char *value = strchr(name, '=');
 
-		if (value != NULL && value > name) {
+		if (value != nullptr && value > name) {
 			*value++ = 0;
 			tag_handler_invoke_pair(handler, handler_ctx,
 						name, value);
@@ -116,7 +116,7 @@ vorbis_scan_comment(const char *comment,
 		g_free(name);
 	}
 
-	for (const struct tag_table *i = xiph_tags; i->name != NULL; ++i)
+	for (const struct tag_table *i = xiph_tags; i->name != nullptr; ++i)
 		if (vorbis_copy_comment(comment, i->name, i->type,
 					handler, handler_ctx))
 			return;

src/decoder/VorbisDecoderPlugin.cxx

@@ -133,9 +133,9 @@ vorbis_is_open(struct vorbis_input_stream *vis, OggVorbis_File *vf,
 	vis->input_stream = &input_stream;
 	vis->seekable = input_stream.CheapSeeking();
 
-	int ret = ov_open_callbacks(vis, vf, NULL, 0, vorbis_is_callbacks);
+	int ret = ov_open_callbacks(vis, vf, nullptr, 0, vorbis_is_callbacks);
 	if (ret < 0) {
-		if (decoder == NULL ||
+		if (decoder == nullptr ||
 		    decoder_get_command(*decoder) == DecoderCommand::NONE)
 			FormatWarning(vorbis_domain,
 				      "Failed to open Ogg Vorbis stream: %s",
@@ -191,7 +191,7 @@ vorbis_stream_decode(Decoder &decoder,
 		return;
 
 	const vorbis_info *vi = ov_info(&vf, -1);
-	if (vi == NULL) {
+	if (vi == nullptr) {
 		LogWarning(vorbis_domain, "ov_info() has failed");
 		return;
 	}
@@ -265,7 +265,7 @@ vorbis_stream_decode(Decoder &decoder,
 
 		if (current_section != prev_section) {
 			vi = ov_info(&vf, -1);
-			if (vi == NULL) {
+			if (vi == nullptr) {
 				LogWarning(vorbis_domain,
 					   "ov_info() has failed");
 				break;
@@ -309,7 +309,7 @@ vorbis_scan_stream(InputStream &is,
 	struct vorbis_input_stream vis;
 	OggVorbis_File vf;
 
-	if (!vorbis_is_open(&vis, &vf, NULL, is))
+	if (!vorbis_is_open(&vis, &vf, nullptr, is))
 		return false;
 
 	tag_handler_invoke_duration(handler, handler_ctx,
@@ -323,7 +323,7 @@ vorbis_scan_stream(InputStream &is,
 }
 
 static const char *const vorbis_suffixes[] = {
-	"ogg", "oga", NULL
+	"ogg", "oga", nullptr
 };
 
 static const char *const vorbis_mime_types[] = {
@@ -335,7 +335,7 @@ static const char *const vorbis_mime_types[] = {
 	"audio/x-ogg",
 	"audio/x-vorbis",
 	"audio/x-vorbis+ogg",
-	NULL
+	nullptr
 };
 
 const struct DecoderPlugin vorbis_decoder_plugin = {