FM / glib

/usr/include/glib-2.0/glib

Name	Size	Mode	Actions
deprecated/	-	0755	rm
galloca.h	3912	0644	edit dl rm
garray.h	11385	0644	edit dl rm
gasyncqueue.h	5726	0644	edit dl rm
gatomic.h	27210	0644	edit dl rm
gbacktrace.h	2793	0644	edit dl rm
gbase64.h	2323	0644	edit dl rm
gbitlock.h	2902	0644	edit dl rm
gbookmarkfile.h	12625	0644	edit dl rm
gbytes.h	3334	0644	edit dl rm
gcharset.h	1578	0644	edit dl rm
gchecksum.h	3864	0644	edit dl rm
gconvert.h	5923	0644	edit dl rm
gdataset.h	6245	0644	edit dl rm
gdate.h	12420	0644	edit dl rm
gdatetime.h	12738	0644	edit dl rm
gdir.h	1641	0644	edit dl rm
genviron.h	2364	0644	edit dl rm
gerror.h	11140	0644	edit dl rm
gfileutils.h	7866	0644	edit dl rm
ggettext.h	2424	0644	edit dl rm
ghash.h	7886	0644	edit dl rm
ghmac.h	3469	0644	edit dl rm
ghook.h	6358	0644	edit dl rm
ghostutils.h	1456	0644	edit dl rm
gi18n-lib.h	1370	0644	edit dl rm
gi18n.h	1167	0644	edit dl rm
giochannel.h	13954	0644	edit dl rm
gkeyfile.h	14913	0644	edit dl rm
glib-autocleanups.h	4903	0644	edit dl rm
glist.h	6930	0644	edit dl rm
gmacros.h	46201	0644	edit dl rm
gmain.h	28212	0644	edit dl rm
gmappedfile.h	1986	0644	edit dl rm
gmarkup.h	10876	0644	edit dl rm
gmem.h	14857	0644	edit dl rm
gmessages.h	27193	0644	edit dl rm
gnode.h	8700	0644	edit dl rm
goption.h	16099	0644	edit dl rm
gpattern.h	1782	0644	edit dl rm
gpoll.h	4125	0644	edit dl rm
gprimes.h	1694	0644	edit dl rm
gprintf.h	1984	0644	edit dl rm
gqsort.h	1499	0644	edit dl rm
gquark.h	2688	0644	edit dl rm
gqueue.h	7750	0644	edit dl rm
grand.h	3181	0644	edit dl rm
grcbox.h	3992	0644	edit dl rm
grefcount.h	3988	0644	edit dl rm
grefstring.h	1868	0644	edit dl rm
gregex.h	28095	0644	edit dl rm
gscanner.h	8861	0644	edit dl rm
gsequence.h	8811	0644	edit dl rm
gshell.h	1752	0644	edit dl rm
gslice.h	4585	0644	edit dl rm
gslist.h	6551	0644	edit dl rm
gspawn.h	13202	0644	edit dl rm
gstdio.h	5109	0644	edit dl rm
gstrfuncs.h	13457	0644	edit dl rm
gstring.h	8331	0644	edit dl rm
gstringchunk.h	2130	0644	edit dl rm
gstrvbuilder.h	1613	0644	edit dl rm
gtestutils.h	35138	0644	edit dl rm
gthread.h	18758	0644	edit dl rm
gthreadpool.h	3824	0644	edit dl rm
gtimer.h	2576	0644	edit dl rm
gtimezone.h	3905	0644	edit dl rm
gtrashstack.h	1906	0644	edit dl rm
gtree.h	6456	0644	edit dl rm
gtypes.h	20516	0644	edit dl rm
gunicode.h	41212	0644	edit dl rm
guri.h	16446	0644	edit dl rm
gutils.h	14559	0644	edit dl rm
guuid.h	1291	0644	edit dl rm
gvariant.h	29560	0644	edit dl rm
gvarianttype.h	13244	0644	edit dl rm
gversion.h	1981	0644	edit dl rm
gversionmacros.h	47677	0644	edit dl rm
gwin32.h	4667	0644	edit dl rm

Edit: /usr/include/glib-2.0/glib/gmessages.h (27193B)

/* GLIB - Library of useful routines for C programming
 * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * 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 2.1 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/>.
 */

/*
 * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GLib Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GLib at ftp://ftp.gtk.org/pub/gtk/.
 */

#ifndef __G_MESSAGES_H__
#define __G_MESSAGES_H__

#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
#error "Only <glib.h> can be included directly."
#endif

#include <stdarg.h>
#include <glib/gatomic.h>
#include <glib/gtypes.h>
#include <glib/gmacros.h>
#include <glib/gvariant.h>

G_BEGIN_DECLS

/* calculate a string size, guaranteed to fit format + args.
 */
GLIB_AVAILABLE_IN_ALL
gsize	g_printf_string_upper_bound (const gchar* format,
				     va_list	  args) G_GNUC_PRINTF(1, 0);

/* Log level shift offset for user defined
 * log levels (0-7 are used by GLib).
 */
#define G_LOG_LEVEL_USER_SHIFT  (8)

/* Glib log levels and flags.
 */
typedef enum
{
  /* log flags */
  G_LOG_FLAG_RECURSION          = 1 << 0,
  G_LOG_FLAG_FATAL              = 1 << 1,

/* GLib log levels */
  G_LOG_LEVEL_ERROR             = 1 << 2,       /* always fatal */
  G_LOG_LEVEL_CRITICAL          = 1 << 3,
  G_LOG_LEVEL_WARNING           = 1 << 4,
  G_LOG_LEVEL_MESSAGE           = 1 << 5,
  G_LOG_LEVEL_INFO              = 1 << 6,
  G_LOG_LEVEL_DEBUG             = 1 << 7,

G_LOG_LEVEL_MASK              = ~(G_LOG_FLAG_RECURSION | G_LOG_FLAG_FATAL)
} GLogLevelFlags;

/* GLib log levels that are considered fatal by default */
#define G_LOG_FATAL_MASK        (G_LOG_FLAG_RECURSION | G_LOG_LEVEL_ERROR)

typedef void            (*GLogFunc)             (const gchar   *log_domain,
                                                 GLogLevelFlags log_level,
                                                 const gchar   *message,
                                                 gpointer       user_data);

/* Logging mechanism
 */
GLIB_AVAILABLE_IN_ALL
guint           g_log_set_handler       (const gchar    *log_domain,
                                         GLogLevelFlags  log_levels,
                                         GLogFunc        log_func,
                                         gpointer        user_data);
GLIB_AVAILABLE_IN_2_46
guint           g_log_set_handler_full  (const gchar    *log_domain,
                                         GLogLevelFlags  log_levels,
                                         GLogFunc        log_func,
                                         gpointer        user_data,
                                         GDestroyNotify  destroy);
GLIB_AVAILABLE_IN_ALL
void            g_log_remove_handler    (const gchar    *log_domain,
                                         guint           handler_id);
GLIB_AVAILABLE_IN_ALL
void            g_log_default_handler   (const gchar    *log_domain,
                                         GLogLevelFlags  log_level,
                                         const gchar    *message,
                                         gpointer        unused_data);
GLIB_AVAILABLE_IN_ALL
GLogFunc        g_log_set_default_handler (GLogFunc      log_func,
					   gpointer      user_data);
GLIB_AVAILABLE_IN_ALL
void            g_log                   (const gchar    *log_domain,
                                         GLogLevelFlags  log_level,
                                         const gchar    *format,
                                         ...) G_GNUC_PRINTF (3, 4);
GLIB_AVAILABLE_IN_ALL
void            g_logv                  (const gchar    *log_domain,
                                         GLogLevelFlags  log_level,
                                         const gchar    *format,
                                         va_list         args) G_GNUC_PRINTF(3, 0);
GLIB_AVAILABLE_IN_ALL
GLogLevelFlags  g_log_set_fatal_mask    (const gchar    *log_domain,
                                         GLogLevelFlags  fatal_mask);
GLIB_AVAILABLE_IN_ALL
GLogLevelFlags  g_log_set_always_fatal  (GLogLevelFlags  fatal_mask);

/* Structured logging mechanism. */

/**
 * GLogWriterOutput:
 * @G_LOG_WRITER_HANDLED: Log writer has handled the log entry.
 * @G_LOG_WRITER_UNHANDLED: Log writer could not handle the log entry.
 *
 * Return values from #GLogWriterFuncs to indicate whether the given log entry
 * was successfully handled by the writer, or whether there was an error in
 * handling it (and hence a fallback writer should be used).
 *
 * If a #GLogWriterFunc ignores a log entry, it should return
 * %G_LOG_WRITER_HANDLED.
 *
 * Since: 2.50
 */
typedef enum
{
  G_LOG_WRITER_HANDLED = 1,
  G_LOG_WRITER_UNHANDLED = 0,
} GLogWriterOutput;

/**
 * GLogField:
 * @key: field name (UTF-8 string)
 * @value: field value (arbitrary bytes)
 * @length: length of @value, in bytes, or -1 if it is nul-terminated
 *
 * Structure representing a single field in a structured log entry. See
 * g_log_structured() for details.
 *
 * Log fields may contain arbitrary values, including binary with embedded nul
 * bytes. If the field contains a string, the string must be UTF-8 encoded and
 * have a trailing nul byte. Otherwise, @length must be set to a non-negative
 * value.
 *
 * Since: 2.50
 */
typedef struct _GLogField GLogField;
struct _GLogField
{
  const gchar *key;
  gconstpointer value;
  gssize length;
};

/**
 * GLogWriterFunc:
 * @log_level: log level of the message
 * @fields: (array length=n_fields): fields forming the message
 * @n_fields: number of @fields
 * @user_data: user data passed to g_log_set_writer_func()
 *
 * Writer function for log entries. A log entry is a collection of one or more
 * #GLogFields, using the standard [field names from journal
 * specification](https://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html).
 * See g_log_structured() for more information.
 *
 * Writer functions must ignore fields which they do not recognise, unless they
 * can write arbitrary binary output, as field values may be arbitrary binary.
 *
 * @log_level is guaranteed to be included in @fields as the `PRIORITY` field,
 * but is provided separately for convenience of deciding whether or where to
 * output the log entry.
 *
 * Writer functions should return %G_LOG_WRITER_HANDLED if they handled the log
 * message successfully or if they deliberately ignored it. If there was an
 * error handling the message (for example, if the writer function is meant to
 * send messages to a remote logging server and there is a network error), it
 * should return %G_LOG_WRITER_UNHANDLED. This allows writer functions to be
 * chained and fall back to simpler handlers in case of failure.
 *
 * Returns: %G_LOG_WRITER_HANDLED if the log entry was handled successfully;
 *    %G_LOG_WRITER_UNHANDLED otherwise
 * Since: 2.50
 */
typedef GLogWriterOutput (*GLogWriterFunc)     (GLogLevelFlags   log_level,
                                                const GLogField *fields,
                                                gsize            n_fields,
                                                gpointer         user_data);

GLIB_AVAILABLE_IN_2_50
void             g_log_structured              (const gchar     *log_domain,
                                                GLogLevelFlags   log_level,
                                                ...);
GLIB_AVAILABLE_IN_2_50
void             g_log_structured_array        (GLogLevelFlags   log_level,
                                                const GLogField *fields,
                                                gsize            n_fields);

GLIB_AVAILABLE_IN_2_50
void             g_log_variant                 (const gchar     *log_domain,
                                                GLogLevelFlags   log_level,
                                                GVariant        *fields);

GLIB_AVAILABLE_IN_2_50
void             g_log_set_writer_func         (GLogWriterFunc   func,
                                                gpointer         user_data,
                                                GDestroyNotify   user_data_free);

GLIB_AVAILABLE_IN_2_50
gboolean         g_log_writer_supports_color   (gint             output_fd);
GLIB_AVAILABLE_IN_2_50
gboolean         g_log_writer_is_journald      (gint             output_fd);

GLIB_AVAILABLE_IN_2_50
gchar           *g_log_writer_format_fields    (GLogLevelFlags   log_level,
                                                const GLogField *fields,
                                                gsize            n_fields,
                                                gboolean         use_color);

GLIB_AVAILABLE_IN_2_50
GLogWriterOutput g_log_writer_journald         (GLogLevelFlags   log_level,
                                                const GLogField *fields,
                                                gsize            n_fields,
                                                gpointer         user_data);
GLIB_AVAILABLE_IN_2_50
GLogWriterOutput g_log_writer_standard_streams (GLogLevelFlags   log_level,
                                                const GLogField *fields,
                                                gsize            n_fields,
                                                gpointer         user_data);
GLIB_AVAILABLE_IN_2_50
GLogWriterOutput g_log_writer_default          (GLogLevelFlags   log_level,
                                                const GLogField *fields,
                                                gsize            n_fields,
                                                gpointer         user_data);

GLIB_AVAILABLE_IN_2_68
void            g_log_writer_default_set_use_stderr (gboolean use_stderr);
GLIB_AVAILABLE_IN_2_68
gboolean        g_log_writer_default_would_drop (GLogLevelFlags  log_level,
                                                 const char     *log_domain);

/**
 * G_DEBUG_HERE:
 *
 * A convenience form of g_log_structured(), recommended to be added to
 * functions when debugging. It prints the current monotonic time and the code
 * location using %G_STRLOC.
 *
 * Since: 2.50
 */
#define G_DEBUG_HERE()                                          \
  g_log_structured (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,            \
                    "CODE_FILE", __FILE__,                      \
                    "CODE_LINE", G_STRINGIFY (__LINE__),        \
                    "CODE_FUNC", G_STRFUNC,                      \
                    "MESSAGE", "%" G_GINT64_FORMAT ": %s",      \
                    g_get_monotonic_time (), G_STRLOC)

/* internal */
void	_g_log_fallback_handler	(const gchar   *log_domain,
						 GLogLevelFlags log_level,
						 const gchar   *message,
						 gpointer       unused_data);

/* Internal functions, used to implement the following macros */
GLIB_AVAILABLE_IN_ALL
void g_return_if_fail_warning (const char *log_domain,
			       const char *pretty_function,
			       const char *expression) G_ANALYZER_NORETURN;
GLIB_AVAILABLE_IN_ALL
void g_warn_message           (const char     *domain,
                               const char     *file,
                               int             line,
                               const char     *func,
                               const char     *warnexpr) G_ANALYZER_NORETURN;
GLIB_DEPRECATED
G_NORETURN
void g_assert_warning         (const char *log_domain,
			       const char *file,
			       const int   line,
		               const char *pretty_function,
		               const char *expression);

GLIB_AVAILABLE_IN_2_56
void g_log_structured_standard (const gchar    *log_domain,
                                GLogLevelFlags  log_level,
                                const gchar    *file,
                                const gchar    *line,
                                const gchar    *func,
                                const gchar    *message_format,
                                ...) G_GNUC_PRINTF (6, 7);

#ifndef G_LOG_DOMAIN
#define G_LOG_DOMAIN    ((gchar*) 0)
#endif  /* G_LOG_DOMAIN */

#if defined(G_HAVE_ISO_VARARGS) && !G_ANALYZER_ANALYZING
#if defined(G_LOG_USE_STRUCTURED) && GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_56
#define g_error(...)  G_STMT_START {                                            \
                        g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_ERROR, \
                                                   __FILE__, G_STRINGIFY (__LINE__), \
                                                   G_STRFUNC, __VA_ARGS__); \
                        for (;;) ;                                              \
                      } G_STMT_END
#define g_message(...)  g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, \
                                                   __FILE__, G_STRINGIFY (__LINE__), \
                                                   G_STRFUNC, __VA_ARGS__)
#define g_critical(...) g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
                                                   __FILE__, G_STRINGIFY (__LINE__), \
                                                   G_STRFUNC, __VA_ARGS__)
#define g_warning(...)  g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_WARNING, \
                                                   __FILE__, G_STRINGIFY (__LINE__), \
                                                   G_STRFUNC, __VA_ARGS__)
#define g_info(...)     g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, \
                                                   __FILE__, G_STRINGIFY (__LINE__), \
                                                   G_STRFUNC, __VA_ARGS__)
#define g_debug(...)    g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
                                                   __FILE__, G_STRINGIFY (__LINE__), \
                                                   G_STRFUNC, __VA_ARGS__)
#else
/* for(;;) ; so that GCC knows that control doesn't go past g_error().
 * Put space before ending semicolon to avoid C++ build warnings.
 */
#define g_error(...)  G_STMT_START {                 \
                        g_log (G_LOG_DOMAIN,         \
                               G_LOG_LEVEL_ERROR,    \
                               __VA_ARGS__);         \
                        for (;;) ;                   \
                      } G_STMT_END
#define g_message(...)  g_log (G_LOG_DOMAIN,         \
                               G_LOG_LEVEL_MESSAGE,  \
                               __VA_ARGS__)
#define g_critical(...) g_log (G_LOG_DOMAIN,         \
                               G_LOG_LEVEL_CRITICAL, \
                               __VA_ARGS__)
#define g_warning(...)  g_log (G_LOG_DOMAIN,         \
                               G_LOG_LEVEL_WARNING,  \
                               __VA_ARGS__)
#define g_info(...)     g_log (G_LOG_DOMAIN,         \
                               G_LOG_LEVEL_INFO,     \
                               __VA_ARGS__)
#define g_debug(...)    g_log (G_LOG_DOMAIN,         \
                               G_LOG_LEVEL_DEBUG,    \
                               __VA_ARGS__)
#endif
#elif defined(G_HAVE_GNUC_VARARGS)  && !G_ANALYZER_ANALYZING
#if defined(G_LOG_USE_STRUCTURED) && GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_56
#define g_error(format...)   G_STMT_START {                                          \
                               g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_ERROR, \
                                                          __FILE__, G_STRINGIFY (__LINE__), \
                                                          G_STRFUNC, format); \
                               for (;;) ;                                            \
                             } G_STMT_END
#define g_message(format...)  g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, \
                                                         __FILE__, G_STRINGIFY (__LINE__), \
                                                         G_STRFUNC, format)
#define g_critical(format...) g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
                                                         __FILE__, G_STRINGIFY (__LINE__), \
                                                         G_STRFUNC, format)
#define g_warning(format...)  g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_WARNING, \
                                                         __FILE__, G_STRINGIFY (__LINE__), \
                                                         G_STRFUNC, format)
#define g_info(format...)     g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, \
                                                         __FILE__, G_STRINGIFY (__LINE__), \
                                                         G_STRFUNC, format)
#define g_debug(format...)    g_log_structured_standard (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \
                                                         __FILE__, G_STRINGIFY (__LINE__), \
                                                         G_STRFUNC, format)
#else
#define g_error(format...)    G_STMT_START {                 \
                                g_log (G_LOG_DOMAIN,         \
                                       G_LOG_LEVEL_ERROR,    \
                                       format);              \
                                for (;;) ;                   \
                              } G_STMT_END

#define g_message(format...)    g_log (G_LOG_DOMAIN,         \
                                       G_LOG_LEVEL_MESSAGE,  \
                                       format)
#define g_critical(format...)   g_log (G_LOG_DOMAIN,         \
                                       G_LOG_LEVEL_CRITICAL, \
                                       format)
#define g_warning(format...)    g_log (G_LOG_DOMAIN,         \
                                       G_LOG_LEVEL_WARNING,  \
                                       format)
#define g_info(format...)       g_log (G_LOG_DOMAIN,         \
                                       G_LOG_LEVEL_INFO,     \
                                       format)
#define g_debug(format...)      g_log (G_LOG_DOMAIN,         \
                                       G_LOG_LEVEL_DEBUG,    \
                                       format)
#endif
#else   /* no varargs macros */
static G_NORETURN void g_error (const gchar *format, ...) G_ANALYZER_NORETURN;
static void g_critical (const gchar *format, ...) G_ANALYZER_NORETURN;

static inline void
g_error (const gchar *format,
         ...)
{
  va_list args;
  va_start (args, format);
  g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_ERROR, format, args);
  va_end (args);

for(;;) ;
}
static inline void
g_message (const gchar *format,
           ...)
{
  va_list args;
  va_start (args, format);
  g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, format, args);
  va_end (args);
}
static inline void
g_critical (const gchar *format,
            ...)
{
  va_list args;
  va_start (args, format);
  g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, format, args);
  va_end (args);
}
static inline void
g_warning (const gchar *format,
           ...)
{
  va_list args;
  va_start (args, format);
  g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_WARNING, format, args);
  va_end (args);
}
static inline void
g_info (const gchar *format,
        ...)
{
  va_list args;
  va_start (args, format);
  g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format, args);
  va_end (args);
}
static inline void
g_debug (const gchar *format,
         ...)
{
  va_list args;
  va_start (args, format);
  g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format, args);
  va_end (args);
}
#endif  /* !__GNUC__ */

/**
 * g_warning_once:
 * @...: format string, followed by parameters to insert
 *     into the format string (as with printf())
 *
 * Logs a warning only once.
 *
 * g_warning_once() calls g_warning() with the passed message the first time
 * the statement is executed; subsequent times it is a no-op.
 *
 * Note! On platforms where the compiler doesn't support variadic macros, the
 * warning is printed each time instead of only once.
 *
 * Since: 2.64
 */
#if defined(G_HAVE_ISO_VARARGS) && !G_ANALYZER_ANALYZING
#define g_warning_once(...) \
  G_STMT_START { \
    static int G_PASTE (_GWarningOnceBoolean, __LINE__) = 0;  /* (atomic) */ \
    if (g_atomic_int_compare_and_exchange (&G_PASTE (_GWarningOnceBoolean, __LINE__), \
                                           0, 1)) \
      g_warning (__VA_ARGS__); \
  } G_STMT_END \
  GLIB_AVAILABLE_MACRO_IN_2_64
#elif defined(G_HAVE_GNUC_VARARGS)  && !G_ANALYZER_ANALYZING
#define g_warning_once(format...) \
  G_STMT_START { \
    static int G_PASTE (_GWarningOnceBoolean, __LINE__) = 0;  /* (atomic) */ \
    if (g_atomic_int_compare_and_exchange (&G_PASTE (_GWarningOnceBoolean, __LINE__), \
                                           0, 1)) \
      g_warning (format); \
  } G_STMT_END \
  GLIB_AVAILABLE_MACRO_IN_2_64
#else
#define g_warning_once g_warning
#endif

/**
 * GPrintFunc:
 * @string: the message to output
 *
 * Specifies the type of the print handler functions.
 * These are called with the complete formatted string to output.
 */
typedef void    (*GPrintFunc)           (const gchar    *string);
GLIB_AVAILABLE_IN_ALL
void            g_print                 (const gchar    *format,
                                         ...) G_GNUC_PRINTF (1, 2);
GLIB_AVAILABLE_IN_ALL
GPrintFunc      g_set_print_handler     (GPrintFunc      func);
GLIB_AVAILABLE_IN_ALL
void            g_printerr              (const gchar    *format,
                                         ...) G_GNUC_PRINTF (1, 2);
GLIB_AVAILABLE_IN_ALL
GPrintFunc      g_set_printerr_handler  (GPrintFunc      func);

/**
 * g_warn_if_reached:
 *
 * Logs a warning.
 *
 * Since: 2.16
 */
#define g_warn_if_reached() \
  do { \
    g_warn_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, NULL); \
  } while (0)

/**
 * g_warn_if_fail:
 * @expr: the expression to check
 *
 * Logs a warning if the expression is not true.
 *
 * Since: 2.16
 */
#define g_warn_if_fail(expr) \
  do { \
    if G_LIKELY (expr) ; \
    else g_warn_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, #expr); \
  } while (0)

#ifdef G_DISABLE_CHECKS

/**
 * g_return_if_fail:
 * @expr: the expression to check
 *
 * Verifies that the expression @expr, usually representing a precondition,
 * evaluates to %TRUE. If the function returns a value, use
 * g_return_val_if_fail() instead.
 *
 * If @expr evaluates to %FALSE, the current function should be considered to
 * have undefined behaviour (a programmer error). The only correct solution
 * to such an error is to change the module that is calling the current
 * function, so that it avoids this incorrect call.
 *
 * To make this undefined behaviour visible, if @expr evaluates to %FALSE,
 * the result is usually that a critical message is logged and the current
 * function returns.
 *
 * If `G_DISABLE_CHECKS` is defined then the check is not performed.  You
 * should therefore not depend on any side effects of @expr.
 *
 * To debug failure of a g_return_if_fail() check, run the code under a debugger
 * with `G_DEBUG=fatal-criticals` or `G_DEBUG=fatal-warnings` defined in the
 * environment (see [Running GLib Applications](glib-running.html)):
 *
 * |[
 *   G_DEBUG=fatal-warnings gdb ./my-program
 * ]|
 *
 * Any unrelated failures can be skipped over in
 * [gdb](https://www.gnu.org/software/gdb/) using the `continue` command.
 */
#define g_return_if_fail(expr) G_STMT_START{ (void)0; }G_STMT_END

/**
 * g_return_val_if_fail:
 * @expr: the expression to check
 * @val: the value to return from the current function
 *       if the expression is not true
 *
 * Verifies that the expression @expr, usually representing a precondition,
 * evaluates to %TRUE. If the function does not return a value, use
 * g_return_if_fail() instead.
 *
 * If @expr evaluates to %FALSE, the current function should be considered to
 * have undefined behaviour (a programmer error). The only correct solution
 * to such an error is to change the module that is calling the current
 * function, so that it avoids this incorrect call.
 *
 * To make this undefined behaviour visible, if @expr evaluates to %FALSE,
 * the result is usually that a critical message is logged and @val is
 * returned from the current function.
 *
 * If `G_DISABLE_CHECKS` is defined then the check is not performed.  You
 * should therefore not depend on any side effects of @expr.
 *
 * See g_return_if_fail() for guidance on how to debug failure of this check.
 */
#define g_return_val_if_fail(expr,val) G_STMT_START{ (void)0; }G_STMT_END

/**
 * g_return_if_reached:
 *
 * Logs a critical message and returns from the current function.
 * This can only be used in functions which do not return a value.
 *
 * See g_return_if_fail() for guidance on how to debug failure of this check.
 */
#define g_return_if_reached() G_STMT_START{ return; }G_STMT_END

/**
 * g_return_val_if_reached:
 * @val: the value to return from the current function
 *
 * Logs a critical message and returns @val.
 *
 * See g_return_if_fail() for guidance on how to debug failure of this check.
 */
#define g_return_val_if_reached(val) G_STMT_START{ return (val); }G_STMT_END

#else /* !G_DISABLE_CHECKS */

#define g_return_if_fail(expr) \
  G_STMT_START { \
    if (G_LIKELY (expr)) \
      { } \
    else \
      { \
        g_return_if_fail_warning (G_LOG_DOMAIN, \
                                  G_STRFUNC, \
                                  #expr); \
        return; \
      } \
  } G_STMT_END

#define g_return_val_if_fail(expr, val) \
  G_STMT_START { \
    if (G_LIKELY (expr)) \
      { } \
    else \
      { \
        g_return_if_fail_warning (G_LOG_DOMAIN, \
                                  G_STRFUNC, \
                                  #expr); \
        return (val); \
      } \
  } G_STMT_END

#define g_return_if_reached() \
  G_STMT_START { \
    g_log (G_LOG_DOMAIN, \
           G_LOG_LEVEL_CRITICAL, \
           "file %s: line %d (%s): should not be reached", \
           __FILE__, \
           __LINE__, \
           G_STRFUNC); \
    return; \
  } G_STMT_END

#define g_return_val_if_reached(val) \
  G_STMT_START { \
    g_log (G_LOG_DOMAIN, \
           G_LOG_LEVEL_CRITICAL, \
           "file %s: line %d (%s): should not be reached", \
           __FILE__, \
           __LINE__, \
           G_STRFUNC); \
    return (val); \
  } G_STMT_END

#endif /* !G_DISABLE_CHECKS */

G_END_DECLS

#endif /* __G_MESSAGES_H__ */

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