log.h

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/*
  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.
*/

 
#ifndef LV2_LOG_H
#define LV2_LOG_H
 
#define LV2_LOG_URI    "http://lv2plug.in/ns/ext/log"  
#define LV2_LOG_PREFIX LV2_LOG_URI "#"                 
 
#define LV2_LOG__Entry   LV2_LOG_PREFIX "Entry"    
#define LV2_LOG__Error   LV2_LOG_PREFIX "Error"    
#define LV2_LOG__Note    LV2_LOG_PREFIX "Note"     
#define LV2_LOG__Trace   LV2_LOG_PREFIX "Trace"    
#define LV2_LOG__Warning LV2_LOG_PREFIX "Warning"  
#define LV2_LOG__log     LV2_LOG_PREFIX "log"      
 
#include <stdarg.h>
 
#include "urid.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#ifdef __GNUC__
#    define LV2_LOG_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
#else
#    define LV2_LOG_FUNC(fmt, arg1)
#endif

typedef void* LV2_Log_Handle;

typedef struct _LV2_Log {
        LV2_Log_Handle handle;

        LV2_LOG_FUNC(3, 4)
        int (*printf)(LV2_Log_Handle handle,
                      LV2_URID       type,
                      const char*    fmt, ...);

        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 */