1 files changed, 109 insertions, 0 deletions
diff --git a/lv2/log/log.h b/lv2/log/log.h
new file mode 100644
index 0000000..7175339
--- /dev/null
+++ b/lv2/log/log.h
@@ -0,0 +1,109 @@
+/*
+  Copyright 2012-2016 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+   @defgroup log Log
+
+   Interface for plugins to log via the host; see
+   <http://lv2plug.in/ns/ext/log> for details.
+
+   @{
+*/
+
+#ifndef LV2_LOG_H
+#define LV2_LOG_H
+
+#define LV2_LOG_URI    "http://lv2plug.in/ns/ext/log"  ///< http://lv2plug.in/ns/ext/log
+#define LV2_LOG_PREFIX LV2_LOG_URI "#"                 ///< http://lv2plug.in/ns/ext/log#
+
+#define LV2_LOG__Entry   LV2_LOG_PREFIX "Entry"    ///< http://lv2plug.in/ns/ext/log#Entry
+#define LV2_LOG__Error   LV2_LOG_PREFIX "Error"    ///< http://lv2plug.in/ns/ext/log#Error
+#define LV2_LOG__Note    LV2_LOG_PREFIX "Note"     ///< http://lv2plug.in/ns/ext/log#Note
+#define LV2_LOG__Trace   LV2_LOG_PREFIX "Trace"    ///< http://lv2plug.in/ns/ext/log#Trace
+#define LV2_LOG__Warning LV2_LOG_PREFIX "Warning"  ///< http://lv2plug.in/ns/ext/log#Warning
+#define LV2_LOG__log     LV2_LOG_PREFIX "log"      ///< http://lv2plug.in/ns/ext/log#log
+
+#include "lv2/urid/urid.h"
+
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @cond */
+#ifdef __GNUC__
+/** Allow type checking of printf-like functions. */
+#    define LV2_LOG_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
+#else
+#    define LV2_LOG_FUNC(fmt, arg1)
+#endif
+/** @endcond */
+
+/**
+   Opaque data to host data for LV2_Log_Log.
+*/
+typedef void* LV2_Log_Handle;
+
+/**
+   Log feature (LV2_LOG__log)
+*/
+typedef struct _LV2_Log {
+	/**
+	   Opaque pointer to host data.
+
+	   This MUST be passed to methods in this struct whenever they are called.
+	   Otherwise, it must not be interpreted in any way.
+	*/
+	LV2_Log_Handle handle;
+
+	/**
+	   Log a message, passing format parameters directly.
+
+	   The API of this function matches that of the standard C printf function,
+	   except for the addition of the first two parameters.  This function may
+	   be called from any non-realtime context, or from any context if `type`
+	   is @ref LV2_LOG__Trace.
+	*/
+	LV2_LOG_FUNC(3, 4)
+	int (*printf)(LV2_Log_Handle handle,
+	              LV2_URID       type,
+	              const char*    fmt, ...);
+
+	/**
+	   Log a message, passing format parameters in a va_list.
+
+	   The API of this function matches that of the standard C vprintf
+	   function, except for the addition of the first two parameters.  This
+	   function may be called from any non-realtime context, or from any
+	   context if `type` is @ref LV2_LOG__Trace.
+	*/
+	LV2_LOG_FUNC(3, 0)
+	int (*vprintf)(LV2_Log_Handle handle,
+	               LV2_URID       type,
+	               const char*    fmt,
+	               va_list        ap);
+} LV2_Log_Log;
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif  /* LV2_LOG_H */
+
+/**
+   @}
+*/