Util/ASCII: add function StringEqualsCaseASCII()

Replaces GLib's g_ascii_strcasecmp().

16 files changed, 110 insertions, 52 deletions

diff --git a/Makefile.am b/Makefile.am
index b902e9633..36960207a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -245,6 +245,7 @@ libutil_a_SOURCES = \
 	src/util/Error.cxx src/util/Error.hxx \
 	src/util/Domain.hxx \
 	src/util/ReusableArray.hxx \
+	src/util/ASCII.hxx \
 	src/util/StringUtil.cxx src/util/StringUtil.hxx \
 	src/util/FormatString.cxx src/util/FormatString.hxx \
 	src/util/Tokenizer.cxx src/util/Tokenizer.hxx \
diff --git a/src/SongFilter.cxx b/src/SongFilter.cxx
index 8874b3448..62fc8b39f 100644
--- a/src/SongFilter.cxx
+++ b/src/SongFilter.cxx
@@ -21,6 +21,7 @@
 #include "SongFilter.hxx"
 #include "Song.hxx"
 #include "tag/Tag.hxx"
+#include "util/ASCII.hxx"
 
 #include <glib.h>
 
@@ -35,11 +36,11 @@
 unsigned
 locate_parse_type(const char *str)
 {
-	if (0 == g_ascii_strcasecmp(str, LOCATE_TAG_FILE_KEY) ||
-	    0 == g_ascii_strcasecmp(str, LOCATE_TAG_FILE_KEY_OLD))
+	if (StringEqualsCaseASCII(str, LOCATE_TAG_FILE_KEY) ||
+	    StringEqualsCaseASCII(str, LOCATE_TAG_FILE_KEY_OLD))
 		return LOCATE_TAG_FILE_TYPE;
 
-	if (0 == g_ascii_strcasecmp(str, LOCATE_TAG_ANY_KEY))
+	if (StringEqualsCaseASCII(str, LOCATE_TAG_ANY_KEY))
 		return LOCATE_TAG_ANY_TYPE;
 
 	return tag_name_parse_i(str);
diff --git a/src/command/OtherCommands.cxx b/src/command/OtherCommands.cxx
index 1291caf4e..55391af16 100644
--- a/src/command/OtherCommands.cxx
+++ b/src/command/OtherCommands.cxx
@@ -33,6 +33,7 @@
 #include "protocol/Result.hxx"
 #include "ls.hxx"
 #include "Volume.hxx"
+#include "util/ASCII.hxx"
 #include "util/UriUtil.hxx"
 #include "util/Error.hxx"
 #include "fs/AllocatedPath.hxx"
@@ -47,8 +48,6 @@
 #include "StickerDatabase.hxx"
 #endif
 
-#include <glib.h>
-
 #include <assert.h>
 #include <string.h>
 
@@ -298,7 +297,7 @@ handle_idle(Client &client,
 			continue;
 
 		for (j = 0; idle_names[j]; ++j) {
-			if (!g_ascii_strcasecmp(argv[i], idle_names[j])) {
+			if (StringEqualsCaseASCII(argv[i], idle_names[j])) {
 				flags |= (1 << j);
 			}
 		}
diff --git a/src/decoder/MadDecoderPlugin.cxx b/src/decoder/MadDecoderPlugin.cxx
index a6c53bfb6..260ee1900 100644
--- a/src/decoder/MadDecoderPlugin.cxx
+++ b/src/decoder/MadDecoderPlugin.cxx
@@ -26,6 +26,7 @@
 #include "tag/TagRva2.hxx"
 #include "tag/TagHandler.hxx"
 #include "CheckAudioFormat.hxx"
+#include "util/ASCII.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 #include "Log.hxx"
@@ -272,16 +273,16 @@ parse_id3_replay_gain_info(struct replay_gain_info *replay_gain_info,
 		    id3_ucs4_latin1duplicate(id3_field_getstring
 					     (&frame->fields[2]));
 
-		if (g_ascii_strcasecmp(key, "replaygain_track_gain") == 0) {
+		if (StringEqualsCaseASCII(key, "replaygain_track_gain")) {
 			replay_gain_info->tuples[REPLAY_GAIN_TRACK].gain = atof(value);
 			found = true;
-		} else if (g_ascii_strcasecmp(key, "replaygain_album_gain") == 0) {
+		} else if (StringEqualsCaseASCII(key, "replaygain_album_gain")) {
 			replay_gain_info->tuples[REPLAY_GAIN_ALBUM].gain = atof(value);
 			found = true;
-		} else if (g_ascii_strcasecmp(key, "replaygain_track_peak") == 0) {
+		} else if (StringEqualsCaseASCII(key, "replaygain_track_peak")) {
 			replay_gain_info->tuples[REPLAY_GAIN_TRACK].peak = atof(value);
 			found = true;
-		} else if (g_ascii_strcasecmp(key, "replaygain_album_peak") == 0) {
+		} else if (StringEqualsCaseASCII(key, "replaygain_album_peak")) {
 			replay_gain_info->tuples[REPLAY_GAIN_ALBUM].peak = atof(value);
 			found = true;
 		}
@@ -321,10 +322,10 @@ parse_id3_mixramp(char **mixramp_start, char **mixramp_end,
 		    id3_ucs4_latin1duplicate(id3_field_getstring
 					     (&frame->fields[2]));
 
-		if (g_ascii_strcasecmp(key, "mixramp_start") == 0) {
+		if (StringEqualsCaseASCII(key, "mixramp_start")) {
 			*mixramp_start = g_strdup(value);
 			found = true;
-		} else if (g_ascii_strcasecmp(key, "mixramp_end") == 0) {
+		} else if (StringEqualsCaseASCII(key, "mixramp_end")) {
 			*mixramp_end = g_strdup(value);
 			found = true;
 		}
diff --git a/src/input/CurlInputPlugin.cxx b/src/input/CurlInputPlugin.cxx
index da1dec5bd..5a754b78d 100644
--- a/src/input/CurlInputPlugin.cxx
+++ b/src/input/CurlInputPlugin.cxx
@@ -29,6 +29,7 @@
 #include "event/MultiSocketMonitor.hxx"
 #include "event/Call.hxx"
 #include "IOThread.hxx"
+#include "util/ASCII.hxx"
 #include "util/CharUtil.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
@@ -840,11 +841,11 @@ input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
 	while (end > value && IsWhitespaceOrNull(end[-1]))
 		--end;
 
-	if (g_ascii_strcasecmp(name, "accept-ranges") == 0) {
+	if (StringEqualsCaseASCII(name, "accept-ranges")) {
 		/* a stream with icy-metadata is not seekable */
 		if (!c->icy.IsDefined())
 			c->base.seekable = true;
-	} else if (g_ascii_strcasecmp(name, "content-length") == 0) {
+	} else if (StringEqualsCaseASCII(name, "content-length")) {
 		char buffer[64];
 
 		if ((size_t)(end - header) >= sizeof(buffer))
@@ -854,18 +855,18 @@ input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
 		buffer[end - value] = 0;
 
 		c->base.size = c->base.offset + g_ascii_strtoull(buffer, nullptr, 10);
-	} else if (g_ascii_strcasecmp(name, "content-type") == 0) {
+	} else if (StringEqualsCaseASCII(name, "content-type")) {
 		c->base.mime.assign(value, end);
-	} else if (g_ascii_strcasecmp(name, "icy-name") == 0 ||
-		   g_ascii_strcasecmp(name, "ice-name") == 0 ||
-		   g_ascii_strcasecmp(name, "x-audiocast-name") == 0) {
+	} else if (StringEqualsCaseASCII(name, "icy-name") ||
+		   StringEqualsCaseASCII(name, "ice-name") ||
+		   StringEqualsCaseASCII(name, "x-audiocast-name")) {
 		c->meta_name.assign(value, end);
 
 		delete c->tag;
 
 		c->tag = new Tag();
 		c->tag->AddItem(TAG_NAME, c->meta_name.c_str());
-	} else if (g_ascii_strcasecmp(name, "icy-metaint") == 0) {
+	} else if (StringEqualsCaseASCII(name, "icy-metaint")) {
 		char buffer[64];
 		size_t icy_metaint;
 
diff --git a/src/mixer/AlsaMixerPlugin.cxx b/src/mixer/AlsaMixerPlugin.cxx
index 05d70c4c0..f651e94ce 100644
--- a/src/mixer/AlsaMixerPlugin.cxx
+++ b/src/mixer/AlsaMixerPlugin.cxx
@@ -24,6 +24,7 @@
 #include "Main.hxx"
 #include "event/MultiSocketMonitor.hxx"
 #include "event/Loop.hxx"
+#include "util/ASCII.hxx"
 #include "util/ReusableArray.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
@@ -31,7 +32,6 @@
 
 #include <algorithm>
 
-#include <glib.h>
 #include <alsa/asoundlib.h>
 
 #define VOLUME_MIXER_ALSA_DEFAULT		"default"
@@ -197,8 +197,8 @@ alsa_mixer_lookup_elem(snd_mixer_t *handle, const char *name, unsigned idx)
 	for (snd_mixer_elem_t *elem = snd_mixer_first_elem(handle);
 	     elem != NULL; elem = snd_mixer_elem_next(elem)) {
 		if (snd_mixer_elem_get_type(elem) == SND_MIXER_ELEM_SIMPLE &&
-		    g_ascii_strcasecmp(snd_mixer_selem_get_name(elem),
-				       name) == 0 &&
+		    StringEqualsCaseASCII(snd_mixer_selem_get_name(elem),
+					  name) &&
 		    snd_mixer_selem_get_index(elem) == idx)
 			return elem;
 	}
diff --git a/src/playlist/AsxPlaylistPlugin.cxx b/src/playlist/AsxPlaylistPlugin.cxx
index ab204773f..14063fdf2 100644
--- a/src/playlist/AsxPlaylistPlugin.cxx
+++ b/src/playlist/AsxPlaylistPlugin.cxx
@@ -24,6 +24,7 @@
 #include "InputStream.hxx"
 #include "Song.hxx"
 #include "tag/Tag.hxx"
+#include "util/ASCII.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 #include "Log.hxx"
@@ -75,7 +76,7 @@ get_attribute(const gchar **attribute_names, const gchar **attribute_values,
 	      const gchar *name)
 {
 	for (unsigned i = 0; attribute_names[i] != NULL; ++i)
-		if (g_ascii_strcasecmp(attribute_names[i], name) == 0)
+		if (StringEqualsCaseASCII(attribute_names[i], name))
 			return attribute_values[i];
 
 	return NULL;
@@ -92,7 +93,7 @@ asx_start_element(gcc_unused GMarkupParseContext *context,
 
 	switch (parser->state) {
 	case AsxParser::ROOT:
-		if (g_ascii_strcasecmp(element_name, "entry") == 0) {
+		if (StringEqualsCaseASCII(element_name, "entry")) {
 			parser->state = AsxParser::ENTRY;
 			parser->song = Song::NewRemote("asx:");
 			parser->tag = TAG_NUM_OF_ITEM_TYPES;
@@ -101,7 +102,7 @@ asx_start_element(gcc_unused GMarkupParseContext *context,
 		break;
 
 	case AsxParser::ENTRY:
-		if (g_ascii_strcasecmp(element_name, "ref") == 0) {
+		if (StringEqualsCaseASCII(element_name, "ref")) {
 			const gchar *href = get_attribute(attribute_names,
 							  attribute_values,
 							  "href");
@@ -121,11 +122,11 @@ asx_start_element(gcc_unused GMarkupParseContext *context,
 
 				parser->song = song;
 			}
-		} else if (g_ascii_strcasecmp(element_name, "author") == 0)
+		} else if (StringEqualsCaseASCII(element_name, "author"))
 			/* is that correct?  or should it be COMPOSER
 			   or PERFORMER? */
 			parser->tag = TAG_ARTIST;
-		else if (g_ascii_strcasecmp(element_name, "title") == 0)
+		else if (StringEqualsCaseASCII(element_name, "title"))
 			parser->tag = TAG_TITLE;
 
 		break;
@@ -144,7 +145,7 @@ asx_end_element(gcc_unused GMarkupParseContext *context,
 		break;
 
 	case AsxParser::ENTRY:
-		if (g_ascii_strcasecmp(element_name, "entry") == 0) {
+		if (StringEqualsCaseASCII(element_name, "entry")) {
 			if (strcmp(parser->song->uri, "asx:") != 0)
 				parser->songs.emplace_front(parser->song);
 			else
diff --git a/src/playlist/EmbeddedCuePlaylistPlugin.cxx b/src/playlist/EmbeddedCuePlaylistPlugin.cxx
index fe3b4ca12..50390dbd6 100644
--- a/src/playlist/EmbeddedCuePlaylistPlugin.cxx
+++ b/src/playlist/EmbeddedCuePlaylistPlugin.cxx
@@ -35,6 +35,7 @@
 #include "TagFile.hxx"
 #include "cue/CueParser.hxx"
 #include "fs/Traits.hxx"
+#include "util/ASCII.hxx"
 
 #include <glib.h>
 #include <assert.h>
@@ -81,7 +82,7 @@ embcue_tag_pair(const char *name, const char *value, void *ctx)
 	EmbeddedCuePlaylist *playlist = (EmbeddedCuePlaylist *)ctx;
 
 	if (playlist->cuesheet == NULL &&
-	    g_ascii_strcasecmp(name, "cuesheet") == 0)
+	    StringEqualsCaseASCII(name, "cuesheet"))
 		playlist->cuesheet = g_strdup(value);
 }
 
diff --git a/src/playlist/RssPlaylistPlugin.cxx b/src/playlist/RssPlaylistPlugin.cxx
index 7faf6faac..4aa6f1026 100644
--- a/src/playlist/RssPlaylistPlugin.cxx
+++ b/src/playlist/RssPlaylistPlugin.cxx
@@ -24,6 +24,7 @@
 #include "InputStream.hxx"
 #include "Song.hxx"
 #include "tag/Tag.hxx"
+#include "util/ASCII.hxx"
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 #include "Log.hxx"
@@ -74,7 +75,7 @@ get_attribute(const gchar **attribute_names, const gchar **attribute_values,
 	      const gchar *name)
 {
 	for (unsigned i = 0; attribute_names[i] != NULL; ++i)
-		if (g_ascii_strcasecmp(attribute_names[i], name) == 0)
+		if (StringEqualsCaseASCII(attribute_names[i], name))
 			return attribute_values[i];
 
 	return NULL;
@@ -91,7 +92,7 @@ rss_start_element(gcc_unused GMarkupParseContext *context,
 
 	switch (parser->state) {
 	case RssParser::ROOT:
-		if (g_ascii_strcasecmp(element_name, "item") == 0) {
+		if (StringEqualsCaseASCII(element_name, "item")) {
 			parser->state = RssParser::ITEM;
 			parser->song = Song::NewRemote("rss:");
 			parser->tag = TAG_NUM_OF_ITEM_TYPES;
@@ -100,7 +101,7 @@ rss_start_element(gcc_unused GMarkupParseContext *context,
 		break;
 
 	case RssParser::ITEM:
-		if (g_ascii_strcasecmp(element_name, "enclosure") == 0) {
+		if (StringEqualsCaseASCII(element_name, "enclosure")) {
 			const gchar *href = get_attribute(attribute_names,
 							  attribute_values,
 							  "url");
@@ -120,9 +121,9 @@ rss_start_element(gcc_unused GMarkupParseContext *context,
 
 				parser->song = song;
 			}
-		} else if (g_ascii_strcasecmp(element_name, "title") == 0)
+		} else if (StringEqualsCaseASCII(element_name, "title"))
 			parser->tag = TAG_TITLE;
-		else if (g_ascii_strcasecmp(element_name, "itunes:author") == 0)
+		else if (StringEqualsCaseASCII(element_name, "itunes:author"))
 			parser->tag = TAG_ARTIST;
 
 		break;
@@ -141,7 +142,7 @@ rss_end_element(gcc_unused GMarkupParseContext *context,
 		break;
 
 	case RssParser::ITEM:
-		if (g_ascii_strcasecmp(element_name, "item") == 0) {
+		if (StringEqualsCaseASCII(element_name, "item")) {
 			if (strcmp(parser->song->uri, "rss:") != 0)
 				parser->songs.emplace_front(parser->song);
 			else
diff --git a/src/tag/ApeReplayGain.cxx b/src/tag/ApeReplayGain.cxx
index 817eca349..15526d2d9 100644
--- a/src/tag/ApeReplayGain.cxx
+++ b/src/tag/ApeReplayGain.cxx
@@ -21,8 +21,7 @@
 #include "ApeReplayGain.hxx"
 #include "ApeLoader.hxx"
 #include "ReplayGainInfo.hxx"
-
-#include <glib.h>
+#include "util/ASCII.hxx"
 
 #include <string.h>
 #include <stdlib.h>
@@ -43,16 +42,16 @@ replay_gain_ape_callback(unsigned long flags, const char *key,
 	memcpy(value, _value, value_length);
 	value[value_length] = 0;
 
-	if (g_ascii_strcasecmp(key, "replaygain_track_gain") == 0) {
+	if (StringEqualsCaseASCII(key, "replaygain_track_gain")) {
 		info->tuples[REPLAY_GAIN_TRACK].gain = atof(value);
 		return true;
-	} else if (g_ascii_strcasecmp(key, "replaygain_album_gain") == 0) {
+	} else if (StringEqualsCaseASCII(key, "replaygain_album_gain")) {
 		info->tuples[REPLAY_GAIN_ALBUM].gain = atof(value);
 		return true;
-	} else if (g_ascii_strcasecmp(key, "replaygain_track_peak") == 0) {
+	} else if (StringEqualsCaseASCII(key, "replaygain_track_peak")) {
 		info->tuples[REPLAY_GAIN_TRACK].peak = atof(value);
 		return true;
-	} else if (g_ascii_strcasecmp(key, "replaygain_album_peak") == 0) {
+	} else if (StringEqualsCaseASCII(key, "replaygain_album_peak")) {
 		info->tuples[REPLAY_GAIN_ALBUM].peak = atof(value);
 		return true;
 	} else
diff --git a/src/tag/Tag.cxx b/src/tag/Tag.cxx
index 6ff8b3dc9..6bf070429 100644
--- a/src/tag/Tag.cxx
+++ b/src/tag/Tag.cxx
@@ -22,6 +22,7 @@
 #include "TagPool.hxx"
 #include "TagString.hxx"
 #include "TagSettings.h"
+#include "util/ASCII.hxx"
 
 #include <glib.h>
 #include <assert.h>
@@ -50,7 +51,7 @@ tag_name_parse_i(const char *name)
 	for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) {
 		assert(tag_item_names[i] != nullptr);
 
-		if (g_ascii_strcasecmp(name, tag_item_names[i]) == 0)
+		if (StringEqualsCaseASCII(name, tag_item_names[i]))
 			return (TagType)i;
 	}
 
diff --git a/src/tag/TagConfig.cxx b/src/tag/TagConfig.cxx
index 9e47cd05b..96fd1847f 100644
--- a/src/tag/TagConfig.cxx
+++ b/src/tag/TagConfig.cxx
@@ -24,6 +24,7 @@
 #include "ConfigGlobal.hxx"
 #include "ConfigOption.hxx"
 #include "system/FatalError.hxx"
+#include "util/ASCII.hxx"
 
 #include <glib.h>
 
@@ -40,7 +41,7 @@ TagLoadConfig()
 
 	std::fill_n(ignore_tag_items, TAG_NUM_OF_ITEM_TYPES, true);
 
-	if (0 == g_ascii_strcasecmp(value, "none"))
+	if (StringEqualsCaseASCII(value, "none"))
 		return;
 
 	bool quit = false;
diff --git a/src/tag/TagHandler.cxx b/src/tag/TagHandler.cxx
index 9e31a7d1d..80982ef50 100644
--- a/src/tag/TagHandler.cxx
+++ b/src/tag/TagHandler.cxx
@@ -20,8 +20,7 @@
 #include "config.h"
 #include "TagHandler.hxx"
 #include "TagBuilder.hxx"
-
-#include <glib.h>
+#include "util/ASCII.hxx"
 
 static void
 add_tag_duration(unsigned seconds, void *ctx)
@@ -50,7 +49,7 @@ full_tag_pair(const char *name, gcc_unused const char *value, void *ctx)
 {
 	TagBuilder &tag = *(TagBuilder *)ctx;
 
-	if (g_ascii_strcasecmp(name, "cuesheet") == 0)
+	if (StringEqualsCaseASCII(name, "cuesheet"))
 		tag.SetHasPlaylist(true);
 }
 
diff --git a/src/tag/TagTable.cxx b/src/tag/TagTable.cxx
index c7e920f2e..b51bc35ba 100644
--- a/src/tag/TagTable.cxx
+++ b/src/tag/TagTable.cxx
@@ -18,8 +18,7 @@
  */
 
 #include "TagTable.hxx"
-
-#include <glib.h>
+#include "util/ASCII.hxx"
 
 #include <string.h>
 
@@ -47,7 +46,7 @@ TagType
 tag_table_lookup_i(const struct tag_table *table, const char *name)
 {
 	for (; table->name != nullptr; ++table)
-		if (g_ascii_strcasecmp(name, table->name) == 0)
+		if (StringEqualsCaseASCII(name, table->name))
 			return table->type;
 
 	return TAG_NUM_OF_ITEM_TYPES;
diff --git a/src/util/ASCII.hxx b/src/util/ASCII.hxx
new file mode 100644
index 000000000..0d4c8f35b
--- /dev/null
+++ b/src/util/ASCII.hxx
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2013 Max Kellermann <max@duempel.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef MPD_ASCII_HXX
+#define MPD_ASCII_HXX
+
+#include "Compiler.h"
+
+#include <assert.h>
+#include <string.h>
+
+/**
+ * Determine whether two strings are equal, ignoring case for ASCII
+ * letters.
+ */
+gcc_pure gcc_nonnull_all
+static inline bool
+StringEqualsCaseASCII(const char *a, const char *b)
+{
+  assert(a != nullptr);
+  assert(b != nullptr);
+
+  /* note: strcasecmp() depends on the locale, but for ASCII-only
+     strings, it's safe to use */
+  return strcasecmp(a, b) == 0;
+}
+
+#endif
diff --git a/src/util/StringUtil.cxx b/src/util/StringUtil.cxx
index 048f009f5..7e295bf90 100644
--- a/src/util/StringUtil.cxx
+++ b/src/util/StringUtil.cxx
@@ -19,8 +19,7 @@
 
 #include "StringUtil.hxx"
 #include "CharUtil.hxx"
-
-#include <glib.h>
+#include "ASCII.hxx"
 
 #include <assert.h>
 
@@ -40,7 +39,7 @@ string_array_contains(const char *const* haystack, const char *needle)
 	assert(needle != nullptr);
 
 	for (; *haystack != nullptr; ++haystack)
-		if (g_ascii_strcasecmp(*haystack, needle) == 0)
+		if (StringEqualsCaseASCII(*haystack, needle))
 			return true;
 
 	return false;