Debug.h

/*
 * $Id: Debug.h 3444 2012-11-05 14:29:38Z karijes $
 *
 * Debug functions
 * Copyright (c) 2005-2011 edelib authors
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __EDELIB_DEBUG_H__
#define __EDELIB_DEBUG_H__

#include "edelib-global.h"
#include <stdarg.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef SKIP_DOCS
EDELIB_API void edelib_logv(const char *domain, int type, const char *fmt, va_list args);
EDELIB_API void edelib_log(const char *domain, int type, const char *fmt, ...);
#endif

typedef enum {
        EDELIB_ERROR_MESSAGE_DEBUG,      
        EDELIB_ERROR_MESSAGE_WARNING,    
        EDELIB_ERROR_MESSAGE_FATAL       
} EdelibErrorMessageType;

EDELIB_API void edelib_error_message_handler_install(void (*)(int t, const char* domain, const char* msg));

#ifndef E_LOG_DOMAIN
 #define E_LOG_DOMAIN ((char*)0)
#endif

#ifdef __GNUC__
 #define _E_FUNCTION_NAME __PRETTY_FUNCTION__
#else
 #define _E_FUNCTION_NAME "<unknown>"
#endif

#ifdef EDELIB_HAVE_ISO_VARARGS
 #define E_DEBUG(...)    edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_DEBUG, __VA_ARGS__)
 #define E_WARNING(...)  edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_WARNING, __VA_ARGS__)
 #define E_FATAL(...)    edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_FATAL, __VA_ARGS__)
#elif defined(EDELIB_HAVE_GNUC_VARARGS)
 #define E_DEBUG(format...)    edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_DEBUG, format)
 #define E_WARNING(format...)  edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_WARNING, format)
 #define E_FATAL(format...)    edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_FATAL, format)
#else
 void E_DEBUG(const char *fmt, ...);
 void E_WARNING(const char *fmt, ...);
 void E_FATAL(const char *fmt, ...);
#endif

#ifdef NDEBUG
 #define E_ASSERT(expr)
#else
 #define E_ASSERT(expr) \
        do { \
                if(!(expr)) \
                edelib_log(E_LOG_DOMAIN, EDELIB_ERROR_MESSAGE_FATAL, "Assertion failed: \"%s\" in %s (%d), function: \"%s\"\n", \
                        #expr, __FILE__, __LINE__, _E_FUNCTION_NAME); \
        } while(0);
#endif

#define _E_STRLOC_STRINGIFY(arg)          _E_STRLOC_STRINGIFY_ARG(arg)
#define _E_STRLOC_STRINGIFY_ARG(content)  #content

#define E_STRLOC __FILE__ ":" _E_STRLOC_STRINGIFY(__LINE__)

#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
        #define _E_BOOLEAN_EXPR(expr)         \
        __extension__ ({                      \
                        int _edelib_boolean_var_;     \
                        if(expr)                      \
                                _edelib_boolean_var_ = 1; \
                        else                          \
                                _edelib_boolean_var_ = 0; \
                        _edelib_boolean_var_;         \
        })

        #define E_LIKELY(expr)   (__builtin_expect(_E_BOOLEAN_EXPR(expr), 1))
        #define E_UNLIKELY(expr) (__builtin_expect(_E_BOOLEAN_EXPR(expr), 0))
#else
        #define E_LIKELY(expr)   (expr)
        #define E_UNLIKELY(expr) (expr)
#endif

#define E_RETURN_IF_FAIL(expr)                                      \
        do {                                                            \
                if E_LIKELY(expr) { }                                       \
                else {                                                      \
                        E_WARNING(E_STRLOC ": Condition '%s' failed\n", #expr); \
                        return;                                                 \
                }                                                           \
        } while(0)                 

#define E_RETURN_VAL_IF_FAIL(expr, val)                             \
        do {                                                            \
                if E_LIKELY(expr) { }                                       \
                else {                                                      \
                        E_WARNING(E_STRLOC ": Condition '%s' failed\n", #expr); \
                        return (val);                                           \
                }                                                           \
        } while(0)


/* compatibility with the old code */
#define EDEBUG   E_DEBUG
#define EWARNING E_WARNING
#define EFATAL   E_FATAL
#define EASSERT  E_ASSERT
#define ESTRLOC  E_STRLOC

#ifdef __cplusplus
}
#endif

#endif