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- /* 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/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);
- /**
- * 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
- void g_assert_warning (const char *log_domain,
- const char *file,
- const int line,
- const char *pretty_function,
- const char *expression) G_GNUC_NORETURN;
- 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 void g_error (const gchar *format, ...) G_GNUC_NORETURN 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__ */
- /**
- * 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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