Log: add libfmt support

18 files changed, 233 insertions, 1 deletions

diff --git a/meson.build b/meson.build
index 625a0eb63..fa9a79934 100644
--- a/meson.build
+++ b/meson.build
@@ -241,10 +241,12 @@ log = static_library(
   'src/Log.cxx',
   'src/LogBackend.cxx',
   include_directories: inc,
+  dependencies: fmt_dep,
 )
 
 log_dep = declare_dependency(
   link_with: log,
+  dependencies: fmt_dep,
 )
 
 sources = [
diff --git a/src/Log.cxx b/src/Log.cxx
index d5a22ef26..fb82703e6 100644
--- a/src/Log.cxx
+++ b/src/Log.cxx
@@ -21,6 +21,8 @@
 #include "util/Domain.hxx"
 #include "util/Exception.hxx"
 
+#include <fmt/format.h>
+
 #include <cerrno>
 
 #include <stdio.h>
@@ -29,6 +31,15 @@
 static constexpr Domain exception_domain("exception");
 
 void
+LogVFmt(LogLevel level, const Domain &domain,
+	fmt::string_view format_str, fmt::format_args args) noexcept
+{
+	fmt::memory_buffer buffer;
+	fmt::vformat_to(buffer, format_str, args);
+	Log(level, domain, {buffer.data(), buffer.size()});
+}
+
+void
 LogFormatV(LogLevel level, const Domain &domain,
 	   const char *fmt, std::va_list ap) noexcept
 {
diff --git a/src/Log.hxx b/src/Log.hxx
index 127fbfc1d..53c6775ac 100644
--- a/src/Log.hxx
+++ b/src/Log.hxx
@@ -23,6 +23,11 @@
 #include "LogLevel.hxx"
 #include "util/Compiler.h"
 
+#include <fmt/core.h>
+#if FMT_VERSION < 70000
+#include <fmt/format.h>
+#endif
+
 #include <exception>
 #include <string_view>
 
@@ -31,6 +36,66 @@ class Domain;
 void
 Log(LogLevel level, const Domain &domain, std::string_view msg) noexcept;
 
+void
+LogVFmt(LogLevel level, const Domain &domain,
+	fmt::string_view format_str, fmt::format_args args) noexcept;
+
+template<typename S, typename... Args>
+void
+LogFmt(LogLevel level, const Domain &domain,
+       const S &format_str, Args&&... args) noexcept
+{
+#if FMT_VERSION >= 70000
+	return LogVFmt(level, domain, fmt::to_string_view(format_str),
+		       fmt::make_args_checked<Args...>(format_str,
+						       args...));
+#else
+	/* expensive fallback for older libfmt versions */
+	const auto result = fmt::format(format_str, args...);
+	return Log(level, domain, result);
+#endif
+}
+
+template<typename S, typename... Args>
+void
+FmtDebug(const Domain &domain,
+	 const S &format_str, Args&&... args) noexcept
+{
+	LogFmt(LogLevel::DEBUG, domain, format_str, args...);
+}
+
+template<typename S, typename... Args>
+void
+FmtInfo(const Domain &domain,
+	const S &format_str, Args&&... args) noexcept
+{
+	LogFmt(LogLevel::INFO, domain, format_str, args...);
+}
+
+template<typename S, typename... Args>
+void
+FmtNotice(const Domain &domain,
+	  const S &format_str, Args&&... args) noexcept
+{
+	LogFmt(LogLevel::NOTICE, domain, format_str, args...);
+}
+
+template<typename S, typename... Args>
+void
+FmtWarning(const Domain &domain,
+	   const S &format_str, Args&&... args) noexcept
+{
+	LogFmt(LogLevel::WARNING, domain, format_str, args...);
+}
+
+template<typename S, typename... Args>
+void
+FmtError(const Domain &domain,
+	 const S &format_str, Args&&... args) noexcept
+{
+	LogFmt(LogLevel::ERROR, domain, format_str, args...);
+}
+
 gcc_printf(3,4)
 void
 LogFormat(LogLevel level, const Domain &domain, const char *fmt, ...) noexcept;
@@ -67,6 +132,9 @@ gcc_printf(2,3)
 void
 FormatDebug(const Domain &domain, const char *fmt, ...) noexcept;
 
+void
+FormatDebug(const Domain &domain, const char *fmt, ...) noexcept;
+
 static inline void
 LogInfo(const Domain &domain, const char *msg) noexcept
 {
diff --git a/src/db/plugins/meson.build b/src/db/plugins/meson.build
index fdfd3d501..8ea565348 100644
--- a/src/db/plugins/meson.build
+++ b/src/db/plugins/meson.build
@@ -36,6 +36,7 @@ db_plugins = static_library(
   dependencies: [
     upnp_dep,
     libmpdclient_dep,
+    log_dep,
   ],
 )
 
diff --git a/src/decoder/meson.build b/src/decoder/meson.build
index b8bec5787..062d5cf1f 100644
--- a/src/decoder/meson.build
+++ b/src/decoder/meson.build
@@ -28,6 +28,9 @@ decoder_glue = static_library(
   'decoder_glue',
   'DecoderList.cxx',
   include_directories: inc,
+  dependencies: [
+    log_dep,
+  ],
 )
 
 decoder_glue_dep = declare_dependency(
diff --git a/src/decoder/plugins/meson.build b/src/decoder/plugins/meson.build
index 6dfb5de7a..2322eeaaa 100644
--- a/src/decoder/plugins/meson.build
+++ b/src/decoder/plugins/meson.build
@@ -208,6 +208,7 @@ decoder_plugins = static_library(
     ogg_dep,
     wavpack_dep,
     wildmidi_dep,
+    log_dep,
   ],
 )
 
diff --git a/src/filter/plugins/meson.build b/src/filter/plugins/meson.build
index cf313f20b..b0dfb3708 100644
--- a/src/filter/plugins/meson.build
+++ b/src/filter/plugins/meson.build
@@ -1,5 +1,5 @@
 filter_plugins_sources = []
-filter_plugins_deps = []
+filter_plugins_deps = [fmt_dep]
 
 if libavfilter_dep.found()
   filter_plugins_sources += [
diff --git a/src/input/meson.build b/src/input/meson.build
index 03795b21b..282474ba6 100644
--- a/src/input/meson.build
+++ b/src/input/meson.build
@@ -45,6 +45,7 @@ input_glue = static_library(
   include_directories: inc,
   dependencies: [
     boost_dep,
+    log_dep,
   ],
 )
 
diff --git a/src/lib/ffmpeg/meson.build b/src/lib/ffmpeg/meson.build
index 31eda8167..43ceef505 100644
--- a/src/lib/ffmpeg/meson.build
+++ b/src/lib/ffmpeg/meson.build
@@ -41,6 +41,7 @@ ffmpeg = static_library(
     libavcodec_dep,
     libavfilter_dep,
     libavutil_dep,
+    log_dep,
   ],
 )
 
diff --git a/src/lib/fmt/AudioFormatFormatter.hxx b/src/lib/fmt/AudioFormatFormatter.hxx
new file mode 100644
index 000000000..30206ff1d
--- /dev/null
+++ b/src/lib/fmt/AudioFormatFormatter.hxx
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2021 Max Kellermann <max.kellermann@gmail.com>
+ *
+ * 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 AUDIO_FORMAT_FORMATTER_HXX
+#define AUDIO_FORMAT_FORMATTER_HXX
+
+#include "pcm/AudioFormat.hxx"
+#include "util/StringBuffer.hxx"
+
+#include <fmt/format.h>
+
+template<>
+struct fmt::formatter<AudioFormat> : formatter<string_view>
+{
+	template<typename FormatContext>
+	auto format(const AudioFormat &af, FormatContext &ctx) {
+		return formatter<string_view>::format(ToString(af).c_str(),
+						      ctx);
+	}
+};
+
+#endif
diff --git a/src/lib/fmt/ExceptionFormatter.hxx b/src/lib/fmt/ExceptionFormatter.hxx
new file mode 100644
index 000000000..31c9f0df2
--- /dev/null
+++ b/src/lib/fmt/ExceptionFormatter.hxx
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2021 Max Kellermann <max.kellermann@gmail.com>
+ *
+ * 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 EXCEPTION_FORMATTER_HXX
+#define EXCEPTION_FORMATTER_HXX
+
+#include "util/Exception.hxx"
+
+#include <fmt/format.h>
+
+template<>
+struct fmt::formatter<std::exception_ptr> : formatter<string_view>
+{
+	template<typename FormatContext>
+	auto format(std::exception_ptr e, FormatContext &ctx) {
+		return formatter<string_view>::format(GetFullMessage(e), ctx);
+	}
+};
+
+#endif
diff --git a/src/lib/fmt/PathFormatter.hxx b/src/lib/fmt/PathFormatter.hxx
new file mode 100644
index 000000000..91aca6c7c
--- /dev/null
+++ b/src/lib/fmt/PathFormatter.hxx
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2003-2021 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef PATH_FORMATTER_HXX
+#define PATH_FORMATTER_HXX
+
+#include "fs/Path.hxx"
+#include "fs/AllocatedPath.hxx"
+
+#include <fmt/format.h>
+
+template<>
+struct fmt::formatter<Path> : formatter<string_view>
+{
+	template<typename FormatContext>
+	auto format(Path path, FormatContext &ctx) {
+		return formatter<string_view>::format(path.ToUTF8(), ctx);
+	}
+};
+
+template<>
+struct fmt::formatter<AllocatedPath> : formatter<Path> {};
+
+#endif
diff --git a/src/lib/nfs/meson.build b/src/lib/nfs/meson.build
index 3d52e0107..467da596b 100644
--- a/src/lib/nfs/meson.build
+++ b/src/lib/nfs/meson.build
@@ -16,6 +16,7 @@ nfs = static_library(
   include_directories: inc,
   dependencies: [
     nfs_dep,
+    log_dep,
   ],
 )
 
diff --git a/src/lib/xiph/meson.build b/src/lib/xiph/meson.build
index 4666d28fc..7f56c76e0 100644
--- a/src/lib/xiph/meson.build
+++ b/src/lib/xiph/meson.build
@@ -124,6 +124,7 @@ if libflac_dep.found()
     include_directories: inc,
     dependencies: [
       libflac_dep,
+      log_dep,
     ],
   )
 
diff --git a/src/mixer/meson.build b/src/mixer/meson.build
index 54a4bbb8b..748895b7b 100644
--- a/src/mixer/meson.build
+++ b/src/mixer/meson.build
@@ -8,6 +8,9 @@ mixer_glue = static_library(
   'MixerType.cxx',
   'MixerAll.cxx',
   include_directories: inc,
+  dependencies: [
+    log_dep,
+  ],
 )
 
 mixer_glue_dep = declare_dependency(
diff --git a/src/output/plugins/meson.build b/src/output/plugins/meson.build
index 0e51d86b5..a50146021 100644
--- a/src/output/plugins/meson.build
+++ b/src/output/plugins/meson.build
@@ -183,6 +183,7 @@ output_plugins = static_library(
     winmm_dep,
     wasapi_dep,
     boost_dep,
+    output_plugins_deps,
   ],
 )
 
diff --git a/src/storage/meson.build b/src/storage/meson.build
index 6f5095c76..5aa214f01 100644
--- a/src/storage/meson.build
+++ b/src/storage/meson.build
@@ -20,6 +20,7 @@ storage_glue = static_library(
   include_directories: inc,
   dependencies: [
     boost_dep,
+    log_dep,
   ],
 )
 
diff --git a/src/system/meson.build b/src/system/meson.build
index e9ee888b1..eae95655b 100644
--- a/src/system/meson.build
+++ b/src/system/meson.build
@@ -17,6 +17,9 @@ system = static_library(
   'system',
   system_sources,
   include_directories: inc,
+  dependencies: [
+    log_dep,
+  ],
 )
 
 if is_windows