Util/StringUtil: add StringStartsWith()

Replaces GLib's g_str_has_prefix().

src/DatabaseSave.cxx

@@ -27,6 +27,7 @@
 #include "tag/Tag.hxx"
 #include "tag/TagSettings.h"
 #include "fs/Charset.hxx"
+#include "util/StringUtil.hxx"
 #include "util/Error.hxx"
 #include "Log.hxx"
 
@@ -81,16 +82,16 @@ db_load_internal(TextFile &file, Directory &music_root, Error &error)
 
 	while ((line = file.ReadLine()) != nullptr &&
 	       strcmp(line, DIRECTORY_INFO_END) != 0) {
-		if (g_str_has_prefix(line, DB_FORMAT_PREFIX)) {
+		if (StringStartsWith(line, DB_FORMAT_PREFIX)) {
 			format = atoi(line + sizeof(DB_FORMAT_PREFIX) - 1);
-		} else if (g_str_has_prefix(line, DIRECTORY_MPD_VERSION)) {
+		} else if (StringStartsWith(line, DIRECTORY_MPD_VERSION)) {
 			if (found_version) {
 				error.Set(db_domain, "Duplicate version line");
 				return false;
 			}
 
 			found_version = true;
-		} else if (g_str_has_prefix(line, DIRECTORY_FS_CHARSET)) {
+		} else if (StringStartsWith(line, DIRECTORY_FS_CHARSET)) {
 			const char *new_charset;
 
 			if (found_charset) {
@@ -111,7 +112,7 @@ db_load_internal(TextFile &file, Directory &music_root, Error &error)
 					     new_charset, old_charset);
 				return false;
 			}
-		} else if (g_str_has_prefix(line, DB_TAG_PREFIX)) {
+		} else if (StringStartsWith(line, DB_TAG_PREFIX)) {
 			const char *name = line + sizeof(DB_TAG_PREFIX) - 1;
 			TagType tag = tag_name_parse(name);
 			if (tag == TAG_NUM_OF_ITEM_TYPES) {

src/DirectorySave.cxx

@@ -24,6 +24,7 @@
 #include "SongSave.hxx"
 #include "PlaylistDatabase.hxx"
 #include "TextFile.hxx"
+#include "util/StringUtil.hxx"
 #include "util/NumberParser.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
@@ -88,7 +89,7 @@ directory_load_subdir(TextFile &file, Directory &parent, const char *name,
 		return nullptr;
 	}
 
-	if (g_str_has_prefix(line, DIRECTORY_MTIME)) {
+	if (StringStartsWith(line, DIRECTORY_MTIME)) {
 		directory->mtime =
 			ParseUint64(line + sizeof(DIRECTORY_MTIME) - 1);
 
@@ -100,7 +101,7 @@ directory_load_subdir(TextFile &file, Directory &parent, const char *name,
 		}
 	}
 
-	if (!g_str_has_prefix(line, DIRECTORY_BEGIN)) {
+	if (!StringStartsWith(line, DIRECTORY_BEGIN)) {
 		error.Format(directory_domain, "Malformed line: %s", line);
 		directory->Delete();
 		return nullptr;
@@ -121,15 +122,15 @@ directory_load(TextFile &file, Directory &directory, Error &error)
 	const char *line;
 
 	while ((line = file.ReadLine()) != nullptr &&
-	       !g_str_has_prefix(line, DIRECTORY_END)) {
+	       !StringStartsWith(line, DIRECTORY_END)) {
-		if (g_str_has_prefix(line, DIRECTORY_DIR)) {
+		if (StringStartsWith(line, DIRECTORY_DIR)) {
 			Directory *subdir =
 				directory_load_subdir(file, directory,
 						      line + sizeof(DIRECTORY_DIR) - 1,
 						      error);
 			if (subdir == nullptr)
 				return false;
-		} else if (g_str_has_prefix(line, SONG_BEGIN)) {
+		} else if (StringStartsWith(line, SONG_BEGIN)) {
 			const char *name = line + sizeof(SONG_BEGIN) - 1;
 			Song *song;
 
@@ -144,7 +145,7 @@ directory_load(TextFile &file, Directory &directory, Error &error)
 				return false;
 
 			directory.AddSong(song);
-		} else if (g_str_has_prefix(line, PLAYLIST_META_BEGIN)) {
+		} else if (StringStartsWith(line, PLAYLIST_META_BEGIN)) {
 			/* duplicate the name, because
 			   playlist_metadata_load() will overwrite the
 			   buffer */

src/OutputState.cxx

@@ -28,8 +28,7 @@
 #include "OutputInternal.hxx"
 #include "OutputError.hxx"
 #include "Log.hxx"
-
+#include "util/StringUtil.hxx"
-#include <glib.h>
 
 #include <assert.h>
 #include <stdlib.h>
@@ -61,7 +60,7 @@ audio_output_state_read(const char *line)
 	const char *name;
 	struct audio_output *ao;
 
-	if (!g_str_has_prefix(line, AUDIO_DEVICE_STATE))
+	if (!StringStartsWith(line, AUDIO_DEVICE_STATE))
 		return false;
 
 	line += sizeof(AUDIO_DEVICE_STATE) - 1;

src/PlaylistState.cxx

@@ -33,10 +33,9 @@
 #include "ConfigOption.hxx"
 #include "fs/Limits.hxx"
 #include "util/CharUtil.hxx"
+#include "util/StringUtil.hxx"
 #include "Log.hxx"
 
-#include <glib.h>
-
 #include <string.h>
 #include <stdlib.h>
 
@@ -112,7 +111,7 @@ playlist_state_load(TextFile &file, struct playlist &playlist)
 		return;
 	}
 
-	while (!g_str_has_prefix(line, PLAYLIST_STATE_FILE_PLAYLIST_END)) {
+	while (!StringStartsWith(line, PLAYLIST_STATE_FILE_PLAYLIST_END)) {
 		queue_load_song(file, line, playlist.queue);
 
 		line = file.ReadLine();
@@ -135,7 +134,7 @@ playlist_state_restore(const char *line, TextFile &file,
 	int seek_time = 0;
 	bool random_mode = false;
 
-	if (!g_str_has_prefix(line, PLAYLIST_STATE_FILE_STATE))
+	if (!StringStartsWith(line, PLAYLIST_STATE_FILE_STATE))
 		return false;
 
 	line += sizeof(PLAYLIST_STATE_FILE_STATE) - 1;
@@ -149,40 +148,40 @@ playlist_state_restore(const char *line, TextFile &file,
 		state = PlayerState::STOP;
 
 	while ((line = file.ReadLine()) != nullptr) {
-		if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_TIME)) {
+		if (StringStartsWith(line, PLAYLIST_STATE_FILE_TIME)) {
 			seek_time =
 				atoi(&(line[strlen(PLAYLIST_STATE_FILE_TIME)]));
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_REPEAT)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_REPEAT)) {
 			playlist.SetRepeat(pc,
 					   strcmp(&(line[strlen(PLAYLIST_STATE_FILE_REPEAT)]),
 						  "1") == 0);
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_SINGLE)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_SINGLE)) {
 			playlist.SetSingle(pc,
 					   strcmp(&(line[strlen(PLAYLIST_STATE_FILE_SINGLE)]),
 						  "1") == 0);
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CONSUME)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_CONSUME)) {
 			playlist.SetConsume(strcmp(&(line[strlen(PLAYLIST_STATE_FILE_CONSUME)]),
 						   "1") == 0);
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CROSSFADE)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_CROSSFADE)) {
 			pc.SetCrossFade(atoi(line + strlen(PLAYLIST_STATE_FILE_CROSSFADE)));
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_MIXRAMPDB)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_MIXRAMPDB)) {
 			pc.SetMixRampDb(atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDB)));
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_MIXRAMPDELAY)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_MIXRAMPDELAY)) {
 			const char *p = line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDELAY);
 
 			/* this check discards "nan" which was used
 			   prior to MPD 0.18 */
 			if (IsDigitASCII(*p))
 				pc.SetMixRampDelay(atof(p));
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_RANDOM)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_RANDOM)) {
 			random_mode =
 				strcmp(line + strlen(PLAYLIST_STATE_FILE_RANDOM),
 				       "1") == 0;
-		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CURRENT)) {
+		} else if (StringStartsWith(line, PLAYLIST_STATE_FILE_CURRENT)) {
 			current = atoi(&(line
 					 [strlen
 					  (PLAYLIST_STATE_FILE_CURRENT)]));
-		} else if (g_str_has_prefix(line,
+		} else if (StringStartsWith(line,
 					    PLAYLIST_STATE_FILE_PLAYLIST_BEGIN)) {
 			playlist_state_load(file, playlist);
 		}

src/QueueSave.cxx

@@ -26,13 +26,12 @@
 #include "DatabasePlugin.hxx"
 #include "DatabaseGlue.hxx"
 #include "TextFile.hxx"
+#include "util/StringUtil.hxx"
 #include "util/UriUtil.hxx"
 #include "util/Error.hxx"
 #include "fs/Traits.hxx"
 #include "Log.hxx"
 
-#include <glib.h>
-
 #include <stdlib.h>
 
 #define PRIO_LABEL "Prio: "
@@ -78,7 +77,7 @@ queue_load_song(TextFile &file, const char *line, queue &queue)
 		return;
 
 	uint8_t priority = 0;
-	if (g_str_has_prefix(line, PRIO_LABEL)) {
+	if (StringStartsWith(line, PRIO_LABEL)) {
 		priority = strtoul(line + sizeof(PRIO_LABEL) - 1, nullptr, 10);
 
 		line = file.ReadLine();
@@ -89,7 +88,7 @@ queue_load_song(TextFile &file, const char *line, queue &queue)
 	const Database *db = nullptr;
 	Song *song;
 
-	if (g_str_has_prefix(line, SONG_BEGIN)) {
+	if (StringStartsWith(line, SONG_BEGIN)) {
 		const char *uri = line + sizeof(SONG_BEGIN) - 1;
 		if (!uri_has_scheme(uri) && !PathTraits::IsAbsoluteUTF8(uri))
 			return;

src/Volume.cxx

@@ -22,12 +22,11 @@
 #include "MixerAll.hxx"
 #include "Idle.hxx"
 #include "GlobalEvents.hxx"
+#include "util/StringUtil.hxx"
 #include "util/Domain.hxx"
 #include "system/PeriodClock.hxx"
 #include "Log.hxx"
 
-#include <glib.h>
-
 #include <assert.h>
 #include <stdlib.h>
 
@@ -106,7 +105,7 @@ read_sw_volume_state(const char *line)
 	char *end = nullptr;
 	long int sv;
 
-	if (!g_str_has_prefix(line, SW_VOLUME_STATE))
+	if (!StringStartsWith(line, SW_VOLUME_STATE))
 		return false;
 
 	line += sizeof(SW_VOLUME_STATE) - 1;

src/decoder/MadDecoderPlugin.cxx

@@ -26,6 +26,7 @@
 #include "tag/TagRva2.hxx"
 #include "tag/TagHandler.hxx"
 #include "CheckAudioFormat.hxx"
+#include "util/StringUtil.hxx"
 #include "util/ASCII.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
@@ -689,7 +690,7 @@ parse_lame(struct lame *lame, struct mad_bitptr *ptr, int *bitlen)
 	/* This is technically incorrect, since the encoder might not be lame.
 	 * But there's no other way to determine if this is a lame tag, and we
 	 * wouldn't want to go reading a tag that's not there. */
-	if (!g_str_has_prefix(lame->encoder, "LAME"))
+	if (!StringStartsWith(lame->encoder, "LAME"))
 		return false;
 
 	if (sscanf(lame->encoder+4, "%u.%u",

src/input/CdioParanoiaInputPlugin.cxx

@@ -25,6 +25,7 @@
 #include "CdioParanoiaInputPlugin.hxx"
 #include "InputStream.hxx"
 #include "InputPlugin.hxx"
+#include "util/StringUtil.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 #include "system/ByteOrder.hxx"
@@ -117,7 +118,7 @@ struct cdio_uri {
 static bool
 parse_cdio_uri(struct cdio_uri *dest, const char *src, Error &error)
 {
-	if (!g_str_has_prefix(src, "cdda://"))
+	if (!StringStartsWith(src, "cdda://"))
 		return false;
 
 	src += 7;

src/input/DespotifyInputPlugin.cxx

@@ -23,14 +23,13 @@
 #include "InputStream.hxx"
 #include "InputPlugin.hxx"
 #include "tag/Tag.hxx"
+#include "util/StringUtil.hxx"
 #include "Log.hxx"
 
 extern "C" {
 #include <despotify.h>
 }
 
-#include <glib.h>
-
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
@@ -130,7 +129,7 @@ input_despotify_open(const char *url,
 	struct ds_link *ds_link;
 	struct ds_track *track;
 
-	if (!g_str_has_prefix(url, "spt://"))
+	if (!StringStartsWith(url, "spt://"))
 		return nullptr;
 
 	session = mpd_despotify_get_session();

src/input/FfmpegInputPlugin.cxx

@@ -24,6 +24,7 @@
 #include "FfmpegInputPlugin.hxx"
 #include "InputStream.hxx"
 #include "InputPlugin.hxx"
+#include "util/StringUtil.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 
@@ -32,8 +33,6 @@ extern "C" {
 #include <libavformat/avformat.h>
 }
 
-#include <glib.h>
-
 struct FfmpegInputStream {
 	InputStream base;
 
@@ -90,12 +89,12 @@ input_ffmpeg_open(const char *uri,
 		  Mutex &mutex, Cond &cond,
 		  Error &error)
 {
-	if (!g_str_has_prefix(uri, "gopher://") &&
+	if (!StringStartsWith(uri, "gopher://") &&
-	    !g_str_has_prefix(uri, "rtp://") &&
+	    !StringStartsWith(uri, "rtp://") &&
-	    !g_str_has_prefix(uri, "rtsp://") &&
+	    !StringStartsWith(uri, "rtsp://") &&
-	    !g_str_has_prefix(uri, "rtmp://") &&
+	    !StringStartsWith(uri, "rtmp://") &&
-	    !g_str_has_prefix(uri, "rtmpt://") &&
+	    !StringStartsWith(uri, "rtmpt://") &&
-	    !g_str_has_prefix(uri, "rtmps://"))
+	    !StringStartsWith(uri, "rtmps://"))
 		return nullptr;
 
 	AVIOContext *h;

src/input/MmsInputPlugin.cxx

@@ -21,10 +21,10 @@
 #include "MmsInputPlugin.hxx"
 #include "InputStream.hxx"
 #include "InputPlugin.hxx"
+#include "util/StringUtil.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 
-#include <glib.h>
 #include <libmms/mmsx.h>
 
 struct MmsInputStream {
@@ -58,10 +58,10 @@ input_mms_open(const char *url,
 	       Mutex &mutex, Cond &cond,
 	       Error &error)
 {
-	if (!g_str_has_prefix(url, "mms://") &&
+	if (!StringStartsWith(url, "mms://") &&
-	    !g_str_has_prefix(url, "mmsh://") &&
+	    !StringStartsWith(url, "mmsh://") &&
-	    !g_str_has_prefix(url, "mmst://") &&
+	    !StringStartsWith(url, "mmst://") &&
-	    !g_str_has_prefix(url, "mmsu://"))
+	    !StringStartsWith(url, "mmsu://"))
 		return nullptr;
 
 	const auto mms = mmsx_connect(nullptr, nullptr, url, 128 * 1024);

src/ls.cxx

@@ -19,11 +19,10 @@
 
 #include "config.h"
 #include "ls.hxx"
+#include "util/StringUtil.hxx"
 #include "util/UriUtil.hxx"
 #include "Client.hxx"
 
-#include <glib.h>
-
 #include <assert.h>
 
 /**
@@ -90,7 +89,7 @@ bool uri_supported_scheme(const char *uri)
 	assert(uri_has_scheme(uri));
 
 	while (*urlPrefixes) {
-		if (g_str_has_prefix(uri, *urlPrefixes))
+		if (StringStartsWith(uri, *urlPrefixes))
 			return true;
 		urlPrefixes++;
 	}

src/playlist/ExtM3uPlaylistPlugin.cxx

@@ -26,8 +26,6 @@
 #include "util/StringUtil.hxx"
 #include "TextInputStream.hxx"
 
-#include <glib.h>
-
 #include <string.h>
 #include <stdlib.h>
 
@@ -119,7 +117,7 @@ ExtM3uPlaylist::NextSong()
 		
 		line_s = line.c_str();
 
-		if (g_str_has_prefix(line_s, "#EXTINF:")) {
+		if (StringStartsWith(line_s, "#EXTINF:")) {
 			delete tag;
 			tag = extm3u_parse_tag(line_s + 8);
 			continue;

src/playlist/SoundCloudPlaylistPlugin.cxx

@@ -25,6 +25,7 @@
 #include "InputStream.hxx"
 #include "Song.hxx"
 #include "tag/Tag.hxx"
+#include "util/StringUtil.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 #include "Log.hxx"
@@ -65,9 +66,9 @@ static char *
 soundcloud_resolve(const char* uri) {
 	char *u, *ru;
 
-	if (g_str_has_prefix(uri, "http://")) {
+	if (StringStartsWith(uri, "http://")) {
 		u = g_strdup(uri);
-	} else if (g_str_has_prefix(uri, "soundcloud.com")) {
+	} else if (StringStartsWith(uri, "soundcloud.com")) {
 		u = g_strconcat("http://", uri, nullptr);
 	} else {
 		/* assume it's just a path on soundcloud.com */

src/util/StringUtil.cxx

@@ -22,6 +22,7 @@
 #include "ASCII.hxx"
 
 #include <assert.h>
+#include <string.h>
 
 const char *
 strchug_fast(const char *p)
@@ -32,6 +33,13 @@ strchug_fast(const char *p)
 	return p;
 }
 
+bool
+StringStartsWith(const char *haystack, const char *needle)
+{
+	const size_t length = strlen(needle);
+	return memcmp(haystack, needle, length) == 0;
+}
+
 bool
 string_array_contains(const char *const* haystack, const char *needle)
 {

src/util/StringUtil.hxx

@@ -40,6 +40,10 @@ strchug_fast(char *p)
 	return const_cast<char *>(strchug_fast((const char *)p));
 }
 
+gcc_pure
+bool
+StringStartsWith(const char *haystack, const char *needle);
+
 /**
  * Checks whether a string array contains the specified string.
  *