diff --git a/src/db/update/Playlist.cxx b/src/db/update/Playlist.cxx
index 052d55e6d..7b3930801 100644
--- a/src/db/update/Playlist.cxx
+++ b/src/db/update/Playlist.cxx
@@ -17,9 +17,10 @@
 #include "storage/FileInfo.hxx"
 #include "storage/StorageInterface.hxx"
 #include "fs/Traits.hxx"
-#include "util/StringFormat.hxx"
 #include "Log.hxx"
 
+#include <fmt/core.h>
+
 inline void
 UpdateWalk::UpdatePlaylistFile(Directory &directory,
 			       SongEnumerator &contents) noexcept
@@ -41,8 +42,7 @@ UpdateWalk::UpdatePlaylistFile(Directory &directory,
 			   the virtual directory (DEVICE_PLAYLIST) to
 			   the containing directory */
 			: "../" + db_song->filename;
-		db_song->filename = StringFormat<64>("track%04u",
-						     ++track);
+		db_song->filename = fmt::format("track{:04}", ++track);
 
 		{
 			const ScopeDatabaseLock protect;
diff --git a/src/decoder/Thread.cxx b/src/decoder/Thread.cxx
index 2ab2f7ee7..c21dff06a 100644
--- a/src/decoder/Thread.cxx
+++ b/src/decoder/Thread.cxx
@@ -54,7 +54,7 @@ DecoderUriDecode(const DecoderPlugin &plugin,
 	{
 		const ScopeUnlock unlock(bridge.dc.mutex);
 
-		FormatThreadName("decoder:%s", plugin.name);
+		FmtThreadName("decoder:{}", plugin.name);
 
 		plugin.UriDecode(bridge, uri);
 
@@ -98,7 +98,7 @@ decoder_stream_decode(const DecoderPlugin &plugin,
 	{
 		const ScopeUnlock unlock(bridge.dc.mutex);
 
-		FormatThreadName("decoder:%s", plugin.name);
+		FmtThreadName("decoder:{}", plugin.name);
 
 		plugin.StreamDecode(bridge, input_stream);
 
@@ -135,7 +135,7 @@ decoder_file_decode(const DecoderPlugin &plugin,
 	{
 		const ScopeUnlock unlock(bridge.dc.mutex);
 
-		FormatThreadName("decoder:%s", plugin.name);
+		FmtThreadName("decoder:{}", plugin.name);
 
 		plugin.FileDecode(bridge, path);
 
diff --git a/src/decoder/plugins/GmeDecoderPlugin.cxx b/src/decoder/plugins/GmeDecoderPlugin.cxx
index 87fa6952b..6986517a1 100644
--- a/src/decoder/plugins/GmeDecoderPlugin.cxx
+++ b/src/decoder/plugins/GmeDecoderPlugin.cxx
@@ -12,14 +12,16 @@
 #include "fs/AllocatedPath.hxx"
 #include "fs/FileSystem.hxx"
 #include "fs/NarrowPath.hxx"
+#include "lib/fmt/PathFormatter.hxx"
 #include "util/ScopeExit.hxx"
 #include "util/StringCompare.hxx"
-#include "util/StringFormat.hxx"
 #include "util/Domain.hxx"
 #include "Log.hxx"
 
 #include <gme/gme.h>
 
+#include <fmt/format.h>
+
 #include <cassert>
 
 #include <stdlib.h>
@@ -228,16 +230,16 @@ ScanGmeInfo(const gme_info_t &info, unsigned song_num, int track_count,
 			));
 
 	if (track_count > 1)
-		handler.OnTag(TAG_TRACK, StringFormat<16>("%u", song_num + 1).c_str());
+		handler.OnTag(TAG_TRACK, fmt::format_int{song_num + 1}.c_str());
 
 	if (!StringIsEmpty(info.song)) {
 		if (track_count > 1) {
 			/* start numbering subtunes from 1 */
 			const auto tag_title =
-				StringFormat<1024>("%s (%u/%d)",
-						   info.song, song_num + 1,
-						   track_count);
-			handler.OnTag(TAG_TITLE, tag_title.c_str());
+				fmt::format("{} ({}/{})",
+					    info.song, song_num + 1,
+					    track_count);
+			handler.OnTag(TAG_TITLE, tag_title);
 		} else
 			handler.OnTag(TAG_TITLE, info.song);
 	}
@@ -306,7 +308,7 @@ gme_container_scan(Path path_fs)
 	if (num_songs < 2)
 		return list;
 
-	const auto *subtune_suffix = path_fs.GetExtension();
+	const Path subtune_suffix = Path::FromFS(path_fs.GetExtension());
 
 	TagBuilder tag_builder;
 
@@ -315,10 +317,9 @@ gme_container_scan(Path path_fs)
 		AddTagHandler h(tag_builder);
 		ScanMusicEmu(emu, i, h);
 
-		const auto track_name =
-			StringFormat<64>(SUBTUNE_PREFIX "%03u.%s", i+1,
-					 subtune_suffix);
-		tail = list.emplace_after(tail, track_name,
+		auto track_name = fmt::format(SUBTUNE_PREFIX "{:03}.{}",
+					      i + 1, subtune_suffix);
+		tail = list.emplace_after(tail, std::move(track_name),
 					  tag_builder.Commit());
 	}
 
diff --git a/src/decoder/plugins/SidplayDecoderPlugin.cxx b/src/decoder/plugins/SidplayDecoderPlugin.cxx
index f889d4768..006472529 100644
--- a/src/decoder/plugins/SidplayDecoderPlugin.cxx
+++ b/src/decoder/plugins/SidplayDecoderPlugin.cxx
@@ -15,7 +15,6 @@
 #ifdef HAVE_SIDPLAYFP
 #include "io/FileReader.hxx"
 #endif
-#include "util/StringFormat.hxx"
 #include "util/Domain.hxx"
 #include "util/AllocatedString.hxx"
 #include "util/CharUtil.hxx"
@@ -38,6 +37,8 @@
 #include <sidplay/utils/SidDatabase.h>
 #endif
 
+#include <fmt/format.h>
+
 #include <iterator>
 #include <memory>
 
@@ -510,8 +511,8 @@ ScanSidTuneInfo(const SidTuneInfo &info, unsigned track, unsigned n_tracks,
 
 	if (n_tracks > 1) {
 		const auto tag_title =
-			StringFormat<1024>("%s (%u/%u)",
-					   album.c_str(), track, n_tracks);
+			fmt::format("{} ({}/{})",
+				    album.c_str(), track, n_tracks);
 		handler.OnTag(TAG_TITLE, tag_title.c_str());
 	} else
 		handler.OnTag(TAG_TITLE, album.c_str());
@@ -532,7 +533,7 @@ ScanSidTuneInfo(const SidTuneInfo &info, unsigned track, unsigned n_tracks,
 		handler.OnTag(TAG_DATE, date.c_str());
 
 	/* track */
-	handler.OnTag(TAG_TRACK, StringFormat<16>("%u", track).c_str());
+	handler.OnTag(TAG_TRACK, fmt::format_int{track}.c_str());
 }
 
 static bool
@@ -611,7 +612,7 @@ sidplay_container_scan(Path path_fs)
 		/* Construct container/tune path names, eg.
 		   Delta.sid/tune_001.sid */
 		tail = list.emplace_after(tail,
-					  StringFormat<32>(SUBTUNE_PREFIX "%03u.sid", i),
+					  fmt::format(SUBTUNE_PREFIX "{:03}.sid", i),
 					  tag_builder.Commit());
 	}
 
diff --git a/src/decoder/plugins/WildmidiDecoderPlugin.cxx b/src/decoder/plugins/WildmidiDecoderPlugin.cxx
index b3f1efd76..7c41c1c87 100644
--- a/src/decoder/plugins/WildmidiDecoderPlugin.cxx
+++ b/src/decoder/plugins/WildmidiDecoderPlugin.cxx
@@ -5,11 +5,12 @@
 #include "../DecoderAPI.hxx"
 #include "tag/Handler.hxx"
 #include "util/ScopeExit.hxx"
-#include "util/StringFormat.hxx"
 #include "fs/AllocatedPath.hxx"
 #include "fs/FileSystem.hxx"
 #include "fs/Path.hxx"
 #include "fs/NarrowPath.hxx"
+#include "lib/fmt/ToBuffer.hxx"
+#include "lib/fmt/PathFormatter.hxx"
 #include "PluginUnavailable.hxx"
 
 #ifdef _WIN32
@@ -31,11 +32,9 @@ wildmidi_init(const ConfigBlock &block)
 		block.GetPath("config_file",
 			      "/etc/timidity/timidity.cfg");
 
-	if (!FileExists(path)) {
-		const auto utf8 = path.ToUTF8();
-		throw PluginUnavailable(StringFormat<1024>("configuration file does not exist: %s",
-							   utf8.c_str()));
-	}
+	if (!FileExists(path))
+		throw PluginUnavailable{FmtBuffer<1024>("configuration file does not exist: {}",
+							path)};
 
 #ifdef LIBWILDMIDI_VERSION
 	/* WildMidi_ClearError() requires libwildmidi 0.4 */
diff --git a/src/input/ThreadInputStream.cxx b/src/input/ThreadInputStream.cxx
index c844bda60..a9517a42d 100644
--- a/src/input/ThreadInputStream.cxx
+++ b/src/input/ThreadInputStream.cxx
@@ -51,7 +51,7 @@ ThreadInputStream::Start()
 inline void
 ThreadInputStream::ThreadFunc() noexcept
 {
-	FormatThreadName("input:%s", plugin);
+	FmtThreadName("input:{}", plugin);
 
 	std::unique_lock<Mutex> lock(mutex);
 
diff --git a/src/input/plugins/CurlInputPlugin.cxx b/src/input/plugins/CurlInputPlugin.cxx
index be34ca231..409bdf88e 100644
--- a/src/input/plugins/CurlInputPlugin.cxx
+++ b/src/input/plugins/CurlInputPlugin.cxx
@@ -16,10 +16,10 @@
 #include "config/Block.hxx"
 #include "tag/Builder.hxx"
 #include "tag/Tag.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 #include "event/Call.hxx"
 #include "event/Loop.hxx"
 #include "util/ASCII.hxx"
-#include "util/StringFormat.hxx"
 #include "util/NumberParser.hxx"
 #include "util/Domain.hxx"
 #include "Log.hxx"
@@ -33,6 +33,8 @@
 #include "util/UriQueryParser.hxx"
 #endif
 
+#include <fmt/format.h>
+
 #include <cassert>
 #include <cinttypes>
 
@@ -261,8 +263,8 @@ CurlInputStream::OnHeaders(unsigned status,
 
 	if (status < 200 || status >= 300)
 		throw HttpStatusError(status,
-				      StringFormat<40>("got HTTP status %u",
-						       status).c_str());
+				      FmtBuffer<40>("got HTTP status {}",
+						    status).c_str());
 
 	const std::scoped_lock<Mutex> protect(mutex);
 
@@ -475,8 +477,8 @@ CurlInputStream::InitEasy()
 
 	if (proxy_user != nullptr && proxy_password != nullptr)
 		request->SetOption(CURLOPT_PROXYUSERPWD,
-				   StringFormat<1024>("%s:%s", proxy_user,
-						      proxy_password).c_str());
+				   FmtBuffer<1024>("{}:{}", proxy_user,
+						   proxy_password).c_str());
 
 	if (cacert != nullptr)
 		request->SetOption(CURLOPT_CAINFO, cacert);
@@ -532,8 +534,7 @@ CurlInputStream::SeekInternal(offset_type new_offset)
 
 	if (offset > 0)
 		request->SetOption(CURLOPT_RANGE,
-				   StringFormat<40>("%" PRIoffset "-",
-						    offset).c_str());
+				   fmt::format_int{offset}.c_str());
 
 	StartRequest();
 }
diff --git a/src/io/FileOutputStream.cxx b/src/io/FileOutputStream.cxx
index 39e05dd3d..58cde80ac 100644
--- a/src/io/FileOutputStream.cxx
+++ b/src/io/FileOutputStream.cxx
@@ -4,7 +4,7 @@
 #include "FileOutputStream.hxx"
 #include "lib/fmt/PathFormatter.hxx"
 #include "lib/fmt/SystemError.hxx"
-#include "util/StringFormat.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 
 #ifdef _WIN32
 #include <tchar.h>
@@ -282,7 +282,7 @@ try {
 
 		/* hard-link the temporary file to the final path */
 		if (linkat(AT_FDCWD,
-			   StringFormat<64>("/proc/self/fd/%d", fd.Get()),
+			   FmtBuffer<64>("/proc/self/fd/{}", fd.Get()),
 			   directory_fd.Get(), path.c_str(),
 			   AT_SYMLINK_FOLLOW) < 0)
 			throw FmtErrno("Failed to commit {}", path);
diff --git a/src/lib/ffmpeg/LogCallback.cxx b/src/lib/ffmpeg/LogCallback.cxx
index 843a37f54..d17a918bb 100644
--- a/src/lib/ffmpeg/LogCallback.cxx
+++ b/src/lib/ffmpeg/LogCallback.cxx
@@ -6,8 +6,8 @@
 
 #include "LogCallback.hxx"
 #include "Domain.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 #include "util/Domain.hxx"
-#include "util/StringFormat.hxx"
 #include "Log.hxx"
 
 extern "C" {
@@ -40,9 +40,9 @@ FfmpegLogCallback(void *ptr, int level, const char *fmt, std::va_list vl)
 
 	if (cls != nullptr) {
 		const auto domain =
-			StringFormat<64>("%s/%s",
-					 ffmpeg_domain.GetName(),
-					 cls->item_name(ptr));
+			FmtBuffer<64>("{}/{}",
+				      ffmpeg_domain.GetName(),
+				      cls->item_name(ptr));
 		const Domain d(domain);
 
 		char msg[1024];
diff --git a/src/lib/nfs/Error.cxx b/src/lib/nfs/Error.cxx
index 97a94aec7..98f0b2bc6 100644
--- a/src/lib/nfs/Error.cxx
+++ b/src/lib/nfs/Error.cxx
@@ -3,7 +3,7 @@
 // author: Max Kellermann <mk@cm4all.com>
 
 #include "Error.hxx"
-#include "util/StringFormat.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 
 extern "C" {
 #include <nfsc/libnfs.h>
@@ -13,20 +13,20 @@ extern "C" {
 
 #include <string.h>
 
-static StringBuffer<256>
+static auto
 FormatNfsClientError(struct nfs_context *nfs, const char *msg) noexcept
 {
 	assert(msg != nullptr);
 
 	const char *msg2 = nfs_get_error(nfs);
-	return StringFormat<256>("%s: %s", msg, msg2);
+	return FmtBuffer<256>("{}: {}", msg, msg2);
 }
 
 NfsClientError::NfsClientError(struct nfs_context *nfs, const char *msg) noexcept
 	:std::runtime_error(FormatNfsClientError(nfs, msg).c_str()),
 	 code(0) {}
 
-static StringBuffer<256>
+static auto
 FormatNfsClientError(int err, struct nfs_context *nfs, void *data,
 		     const char *msg) noexcept
 {
@@ -40,7 +40,7 @@ FormatNfsClientError(int err, struct nfs_context *nfs, void *data,
 			msg2 = strerror(-err);
 	}
 
-	return StringFormat<256>("%s: %s", msg, msg2);
+	return FmtBuffer<256>("{}: {}", msg, msg2);
 }
 
 NfsClientError::NfsClientError(int err, struct nfs_context *nfs, void *data,
diff --git a/src/lib/sqlite/Database.cxx b/src/lib/sqlite/Database.cxx
index eec66f13e..bbafb02a0 100644
--- a/src/lib/sqlite/Database.cxx
+++ b/src/lib/sqlite/Database.cxx
@@ -3,7 +3,7 @@
 
 #include "Database.hxx"
 #include "Error.hxx"
-#include "util/StringFormat.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 
 namespace Sqlite {
 
@@ -12,8 +12,8 @@ Database::Database(const char *path)
 	int result = sqlite3_open(path, &db);
 	if (result != SQLITE_OK)
 		throw SqliteError(db, result,
-				  StringFormat<1024>("Failed to open sqlite database '%s'",
-						     path));
+				  FmtBuffer<1024>("Failed to open sqlite database '{}'",
+						  path));
 }
 
 } // namespace Sqlite
diff --git a/src/output/Init.cxx b/src/output/Init.cxx
index d19805e2f..3a1509ed4 100644
--- a/src/output/Init.cxx
+++ b/src/output/Init.cxx
@@ -22,9 +22,10 @@
 #include "filter/plugins/VolumeFilterPlugin.hxx"
 #include "filter/plugins/NormalizeFilterPlugin.hxx"
 #include "util/StringAPI.hxx"
-#include "util/StringFormat.hxx"
 #include "Log.hxx"
 
+#include <fmt/core.h>
+
 #include <cassert>
 #include <stdexcept>
 
@@ -153,7 +154,7 @@ FilteredAudioOutput::Configure(const ConfigBlock &block,
 		config_audio_format.Clear();
 	}
 
-	log_name = StringFormat<256>("\"%s\" (%s)", name, plugin_name);
+	log_name = fmt::format("\"{}\" ({})", name, plugin_name);
 
 	/* create the normalization filter (if configured) */
 
diff --git a/src/output/Thread.cxx b/src/output/Thread.cxx
index 87343cdf8..25611435d 100644
--- a/src/output/Thread.cxx
+++ b/src/output/Thread.cxx
@@ -405,7 +405,7 @@ AudioOutputControl::InternalDrain() noexcept
 void
 AudioOutputControl::Task() noexcept
 {
-	FormatThreadName("output:%s", GetName().c_str());
+	FmtThreadName("output:{}", GetName());
 
 	try {
 		SetThreadRealtime();
diff --git a/src/output/plugins/OSXOutputPlugin.cxx b/src/output/plugins/OSXOutputPlugin.cxx
index 45fcdf8a9..ef40fb883 100644
--- a/src/output/plugins/OSXOutputPlugin.cxx
+++ b/src/output/plugins/OSXOutputPlugin.cxx
@@ -10,6 +10,7 @@
 #include "../OutputAPI.hxx"
 #include "mixer/plugins/OSXMixerPlugin.hxx"
 #include "lib/fmt/RuntimeError.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 #include "util/Domain.hxx"
 #include "util/Manual.hxx"
 #include "pcm/Export.hxx"
@@ -20,7 +21,6 @@
 #include "util/RingBuffer.hxx"
 #include "util/StringAPI.hxx"
 #include "util/StringBuffer.hxx"
-#include "util/StringFormat.hxx"
 #include "Log.hxx"
 
 #include <CoreAudio/CoreAudio.h>
@@ -42,20 +42,20 @@
 
 static constexpr unsigned MPD_OSX_BUFFER_TIME_MS = 100;
 
-static StringBuffer<64>
-StreamDescriptionToString(const AudioStreamBasicDescription desc)
+static auto
+StreamDescriptionToString(const AudioStreamBasicDescription desc) noexcept
 {
 	// Only convert the lpcm formats (nothing else supported / used by MPD)
 	assert(desc.mFormatID == kAudioFormatLinearPCM);
 
-	return StringFormat<64>("%u channel %s %sinterleaved %u-bit %s %s (%uHz)",
-				desc.mChannelsPerFrame,
-				(desc.mFormatFlags & kAudioFormatFlagIsNonMixable) ? "" : "mixable",
-				(desc.mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? "non-" : "",
-				desc.mBitsPerChannel,
-				(desc.mFormatFlags & kAudioFormatFlagIsFloat) ? "Float" : "SInt",
-				(desc.mFormatFlags & kAudioFormatFlagIsBigEndian) ? "BE" : "LE",
-				(UInt32)desc.mSampleRate);
+	return FmtBuffer<256>("{} channel {} {}interleaved {}-bit {} {} ({}Hz)",
+			      desc.mChannelsPerFrame,
+			      (desc.mFormatFlags & kAudioFormatFlagIsNonMixable) ? "" : "mixable",
+			      (desc.mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? "non-" : "",
+			      desc.mBitsPerChannel,
+			      (desc.mFormatFlags & kAudioFormatFlagIsFloat) ? "Float" : "SInt",
+			      (desc.mFormatFlags & kAudioFormatFlagIsBigEndian) ? "BE" : "LE",
+			      desc.mSampleRate);
 }
 
 
diff --git a/src/output/plugins/ShoutOutputPlugin.cxx b/src/output/plugins/ShoutOutputPlugin.cxx
index 1f772ae41..a2a377730 100644
--- a/src/output/plugins/ShoutOutputPlugin.cxx
+++ b/src/output/plugins/ShoutOutputPlugin.cxx
@@ -9,11 +9,12 @@
 #include "util/Domain.hxx"
 #include "util/ScopeExit.hxx"
 #include "util/StringAPI.hxx"
-#include "util/StringFormat.hxx"
 #include "Log.hxx"
 
 #include <shout/shout.h>
 
+#include <fmt/format.h>
+
 #include <cassert>
 #include <memory>
 #include <stdexcept>
@@ -99,10 +100,10 @@ static void
 ShoutSetAudioInfo(shout_t *shout_conn, const AudioFormat &audio_format)
 {
 	shout_set_audio_info(shout_conn, SHOUT_AI_CHANNELS,
-			     StringFormat<11>("%u", audio_format.channels));
+			     fmt::format_int{static_cast<unsigned>(audio_format.channels)}.c_str());
 
 	shout_set_audio_info(shout_conn, SHOUT_AI_SAMPLERATE,
-			     StringFormat<11>("%u", audio_format.sample_rate));
+			     fmt::format_int{audio_format.sample_rate}.c_str());
 }
 
 #ifdef SHOUT_TLS
diff --git a/src/storage/plugins/CurlStorage.cxx b/src/storage/plugins/CurlStorage.cxx
index 799a64bb2..6ebb1bd1c 100644
--- a/src/storage/plugins/CurlStorage.cxx
+++ b/src/storage/plugins/CurlStorage.cxx
@@ -15,6 +15,7 @@
 #include "lib/curl/Escape.hxx"
 #include "lib/expat/ExpatParser.hxx"
 #include "lib/fmt/RuntimeError.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 #include "fs/Traits.hxx"
 #include "event/InjectEvent.hxx"
 #include "thread/Mutex.hxx"
@@ -22,7 +23,6 @@
 #include "util/ASCII.hxx"
 #include "util/SpanCast.hxx"
 #include "util/StringCompare.hxx"
-#include "util/StringFormat.hxx"
 #include "util/StringSplit.hxx"
 #include "util/UriExtract.hxx"
 
@@ -252,7 +252,7 @@ public:
 		   username/password are specified */
 		request.SetOption(CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
 
-		request_headers.Append(StringFormat<40>("depth: %u", depth));
+		request_headers.Append(FmtBuffer<40>("depth: {}", depth));
 		request_headers.Append("content-type: text/xml");
 
 		request.SetOption(CURLOPT_HTTPHEADER, request_headers.Get());
diff --git a/src/thread/Name.hxx b/src/thread/Name.hxx
index 9daea8f16..113713d90 100644
--- a/src/thread/Name.hxx
+++ b/src/thread/Name.hxx
@@ -17,7 +17,7 @@
 #endif
 
 #ifdef HAVE_THREAD_NAME
-#include "util/StringFormat.hxx"
+#include "lib/fmt/ToBuffer.hxx"
 #endif
 
 static inline void
@@ -42,10 +42,10 @@ SetThreadName(const char *name) noexcept
 
 template<typename... Args>
 static inline void
-FormatThreadName(const char *fmt, [[maybe_unused]] Args&&... args) noexcept
+FmtThreadName(const char *fmt, [[maybe_unused]] Args&&... args) noexcept
 {
 #ifdef HAVE_THREAD_NAME
-	SetThreadName(StringFormat<16>(fmt, args...));
+	SetThreadName(FmtBuffer<16>(fmt, args...));
 #else
 	(void)fmt;
 #endif
diff --git a/src/util/StringFormat.hxx b/src/util/StringFormat.hxx
deleted file mode 100644
index 81adf98c4..000000000
--- a/src/util/StringFormat.hxx
+++ /dev/null
@@ -1,43 +0,0 @@
-// SPDX-License-Identifier: BSD-2-Clause
-// author: Max Kellermann <max.kellermann@gmail.com>
-
-#ifndef STRING_FORMAT_HXX
-#define STRING_FORMAT_HXX
-
-#include "StringBuffer.hxx" // IWYU pragma: export
-
-#include <stdio.h>
-
-template<typename... Args>
-static inline void
-StringFormat(char *buffer, std::size_t size,
-	     const char *fmt, Args&&... args) noexcept
-{
-	snprintf(buffer, size, fmt, args...);
-}
-
-template<std::size_t CAPACITY, typename... Args>
-static inline void
-StringFormat(StringBuffer<CAPACITY> &buffer,
-	     const char *fmt, Args&&... args) noexcept
-{
-	StringFormat(buffer.data(), buffer.capacity(), fmt, args...);
-}
-
-template<std::size_t CAPACITY, typename... Args>
-static inline StringBuffer<CAPACITY>
-StringFormat(const char *fmt, Args&&... args) noexcept
-{
-	StringBuffer<CAPACITY> result;
-	StringFormat(result, fmt, args...);
-	return result;
-}
-
-template<typename... Args>
-static inline void
-StringFormatUnsafe(char *buffer, const char *fmt, Args&&... args) noexcept
-{
-	sprintf(buffer, fmt, args...);
-}
-
-#endif