1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
48 typedef FILE* GFileDescriptor;
50 typedef gint GFileDescriptor;
53 /* --- structures --- */
54 typedef struct _GLogDomain GLogDomain;
55 typedef struct _GLogHandler GLogHandler;
59 GLogLevelFlags fatal_mask;
60 GLogHandler *handlers;
66 GLogLevelFlags log_level;
73 /* --- prototypes --- */
74 #ifndef HAVE_C99_VSNPRINTF
75 static gsize printf_string_upper_bound (const gchar *format,
78 #endif /* !HAVE_C99_VSNPRINTF */
81 /* --- variables --- */
83 static GMutex* g_messages_lock = NULL;
85 static GLogDomain *g_log_domains = NULL;
86 static GLogLevelFlags g_log_always_fatal = G_LOG_FATAL_MASK;
87 static GPrintFunc glib_print_func = NULL;
88 static GPrintFunc glib_printerr_func = NULL;
90 static GPrivate* g_log_depth = NULL;
92 /* --- functions --- */
97 # include <process.h> /* For _getpid() */
99 static gboolean alloc_console_called = FALSE;
101 static gboolean gonna_abort = FALSE;
103 /* This default message will usually be overwritten. */
104 /* Yes, a fixed size buffer is bad. So sue me. But g_error is never
105 * with huge strings, is it? */
106 static char fatal_msg_buf[1000] = "Unspecified fatal error encountered, aborting.";
107 static char *fatal_msg_ptr = fatal_msg_buf;
109 /* Just use stdio. If we're out of memory, we're hosed anyway. */
112 dowrite (GFileDescriptor fd,
118 memcpy (fatal_msg_ptr, buf, len);
119 fatal_msg_ptr += len;
124 fwrite (buf, len, 1, fd);
130 #define write(fd, buf, len) dowrite(fd, buf, len)
133 ensure_stdout_valid (void)
140 if (!alloc_console_called)
142 handle = GetStdHandle (STD_OUTPUT_HANDLE);
144 if (handle == INVALID_HANDLE_VALUE)
147 alloc_console_called = TRUE;
148 freopen ("CONOUT$", "w", stdout);
153 #define ensure_stdout_valid() /* Define as empty */
157 write_unsigned (GFileDescriptor fd,
166 g_return_if_fail (radix >= 2 && radix <= 36);
195 buffer[i] = c + 'a' - 10;
199 write (fd, buffer, n);
203 write_string (GFileDescriptor fd,
206 write (fd, string, strlen (string));
210 g_log_write_prefix (GFileDescriptor fd,
213 static GLogLevelFlags g_log_msg_prefix = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_DEBUG;
214 static gboolean initialized = FALSE;
216 g_mutex_lock (g_messages_lock);
223 val = g_getenv ("G_MESSAGES_PREFIXED");
227 static const GDebugKey keys[] = {
228 { "error", G_LOG_LEVEL_ERROR },
229 { "critical", G_LOG_LEVEL_CRITICAL },
230 { "warning", G_LOG_LEVEL_WARNING },
231 { "message", G_LOG_LEVEL_MESSAGE },
232 { "info", G_LOG_LEVEL_INFO },
233 { "debug", G_LOG_LEVEL_DEBUG }
236 g_log_msg_prefix = g_parse_debug_string (val, keys, G_N_ELEMENTS (keys));
240 g_mutex_unlock (g_messages_lock);
242 if ((g_log_msg_prefix & mask) == mask)
246 prg_name = g_get_prgname ();
249 write_string (fd, "(process:");
252 write_string (fd, prg_name);
253 write_string (fd, " (pid:");
256 write_unsigned (fd, getpid (), 10);
257 write_string (fd, "): ");
261 static inline GLogDomain*
262 g_log_find_domain (const gchar *log_domain)
264 register GLogDomain *domain;
266 g_mutex_lock (g_messages_lock);
267 domain = g_log_domains;
270 if (strcmp (domain->log_domain, log_domain) == 0)
272 g_mutex_unlock (g_messages_lock);
275 domain = domain->next;
277 g_mutex_unlock (g_messages_lock);
281 static inline GLogDomain*
282 g_log_domain_new (const gchar *log_domain)
284 register GLogDomain *domain;
286 domain = g_new (GLogDomain, 1);
287 domain->log_domain = g_strdup (log_domain);
288 domain->fatal_mask = G_LOG_FATAL_MASK;
289 domain->handlers = NULL;
291 g_mutex_lock (g_messages_lock);
292 domain->next = g_log_domains;
293 g_log_domains = domain;
294 g_mutex_unlock (g_messages_lock);
300 g_log_domain_check_free (GLogDomain *domain)
302 if (domain->fatal_mask == G_LOG_FATAL_MASK &&
303 domain->handlers == NULL)
305 register GLogDomain *last, *work;
309 g_mutex_lock (g_messages_lock);
310 work = g_log_domains;
316 last->next = domain->next;
318 g_log_domains = domain->next;
319 g_free (domain->log_domain);
326 g_mutex_unlock (g_messages_lock);
330 static inline GLogFunc
331 g_log_domain_get_handler (GLogDomain *domain,
332 GLogLevelFlags log_level,
335 if (domain && log_level)
337 register GLogHandler *handler;
339 handler = domain->handlers;
342 if ((handler->log_level & log_level) == log_level)
344 *data = handler->data;
345 return handler->log_func;
347 handler = handler->next;
350 return g_log_default_handler;
354 g_log_set_always_fatal (GLogLevelFlags fatal_mask)
356 GLogLevelFlags old_mask;
358 /* restrict the global mask to levels that are known to glib */
359 fatal_mask &= (1 << G_LOG_LEVEL_USER_SHIFT) - 1;
360 /* force errors to be fatal */
361 fatal_mask |= G_LOG_LEVEL_ERROR;
362 /* remove bogus flag */
363 fatal_mask &= ~G_LOG_FLAG_FATAL;
365 g_mutex_lock (g_messages_lock);
366 old_mask = g_log_always_fatal;
367 g_log_always_fatal = fatal_mask;
368 g_mutex_unlock (g_messages_lock);
374 g_log_set_fatal_mask (const gchar *log_domain,
375 GLogLevelFlags fatal_mask)
377 GLogLevelFlags old_flags;
378 register GLogDomain *domain;
383 /* force errors to be fatal */
384 fatal_mask |= G_LOG_LEVEL_ERROR;
385 /* remove bogus flag */
386 fatal_mask &= ~G_LOG_FLAG_FATAL;
388 domain = g_log_find_domain (log_domain);
390 domain = g_log_domain_new (log_domain);
391 old_flags = domain->fatal_mask;
393 domain->fatal_mask = fatal_mask;
394 g_log_domain_check_free (domain);
400 g_log_set_handler (const gchar *log_domain,
401 GLogLevelFlags log_levels,
405 register GLogDomain *domain;
406 register GLogHandler *handler;
407 static guint handler_id = 0;
409 g_return_val_if_fail ((log_levels & G_LOG_LEVEL_MASK) != 0, 0);
410 g_return_val_if_fail (log_func != NULL, 0);
415 domain = g_log_find_domain (log_domain);
417 domain = g_log_domain_new (log_domain);
419 handler = g_new (GLogHandler, 1);
420 g_mutex_lock (g_messages_lock);
421 handler->id = ++handler_id;
422 g_mutex_unlock (g_messages_lock);
423 handler->log_level = log_levels;
424 handler->log_func = log_func;
425 handler->data = user_data;
426 handler->next = domain->handlers;
427 domain->handlers = handler;
433 g_log_remove_handler (const gchar *log_domain,
436 register GLogDomain *domain;
438 g_return_if_fail (handler_id > 0);
443 domain = g_log_find_domain (log_domain);
446 register GLogHandler *work, *last;
449 work = domain->handlers;
452 if (work->id == handler_id)
455 last->next = work->next;
457 domain->handlers = work->next;
459 g_log_domain_check_free (domain);
466 g_warning ("g_log_remove_handler(): could not find handler with id `%d' for domain \"%s\"",
472 g_logv (const gchar *log_domain,
473 GLogLevelFlags log_level,
480 #ifndef HAVE_VSNPRINTF
482 #endif /* HAVE_VSNPRINTF */
484 log_level &= G_LOG_LEVEL_MASK;
488 /* we use a stack buffer of fixed size, because we might get called
491 #ifdef HAVE_VSNPRINTF
492 vsnprintf (buffer, 1024, format, args1);
493 #else /* !HAVE_VSNPRINTF */
494 G_VA_COPY (args2, args1);
495 if (printf_string_upper_bound (format, FALSE, args1) < 1024)
496 vsprintf (buffer, format, args2);
499 /* since we might be out of memory, we can't use g_vsnprintf(). */
500 /* we are out of luck here */
501 strncpy (buffer, format, 1024);
505 #endif /* !HAVE_VSNPRINTF */
507 for (i = g_bit_nth_msf (log_level, -1); i >= 0; i = g_bit_nth_msf (log_level, i))
509 register GLogLevelFlags test_level;
512 if (log_level & test_level)
514 guint depth = GPOINTER_TO_UINT (g_private_get (g_log_depth));
517 gpointer data = NULL;
519 domain = g_log_find_domain (log_domain ? log_domain : "");
522 test_level |= G_LOG_FLAG_RECURSION;
525 g_private_set (g_log_depth, GUINT_TO_POINTER (depth));
527 g_mutex_lock (g_messages_lock);
528 if ((((domain ? domain->fatal_mask : G_LOG_FATAL_MASK) |
529 g_log_always_fatal) & test_level) != 0)
530 test_level |= G_LOG_FLAG_FATAL;
531 g_mutex_unlock (g_messages_lock);
533 log_func = g_log_domain_get_handler (domain, test_level, &data);
534 log_func (log_domain, test_level, buffer, data);
536 /* *domain can be cluttered now */
538 if (test_level & G_LOG_FLAG_FATAL)
541 MessageBox (NULL, fatal_msg_buf, NULL, MB_OK);
543 #if defined (G_ENABLE_DEBUG) && (defined (SIGTRAP) || defined (G_OS_WIN32))
544 if (!(test_level & G_LOG_FLAG_RECURSION))
548 #else /* !G_ENABLE_DEBUG || !(SIGTRAP || G_OS_WIN32) */
550 #endif /* !G_ENABLE_DEBUG || !(SIGTRAP || G_OS_WIN32) */
554 g_private_set (g_log_depth, GUINT_TO_POINTER (depth));
560 g_log (const gchar *log_domain,
561 GLogLevelFlags log_level,
567 va_start (args, format);
568 g_logv (log_domain, log_level, format, args);
573 g_log_default_handler (const gchar *log_domain,
574 GLogLevelFlags log_level,
575 const gchar *message,
576 gpointer unused_data)
579 gboolean in_recursion;
582 in_recursion = (log_level & G_LOG_FLAG_RECURSION) != 0;
583 is_fatal = (log_level & G_LOG_FLAG_FATAL) != 0;
584 log_level &= G_LOG_LEVEL_MASK;
587 message = "g_log_default_handler(): (NULL) message";
590 /* Use just stdout as stderr is hard to get redirected from the
594 gonna_abort = is_fatal;
596 fd = (log_level > G_LOG_LEVEL_MESSAGE) ? 1 : 2;
601 case G_LOG_LEVEL_ERROR:
602 /* use write(2) for output, in case we are out of memeory */
603 ensure_stdout_valid ();
605 g_log_write_prefix (fd, log_level);
609 write (fd, log_domain, strlen (log_domain));
613 write (fd, "** ", 3);
615 write (fd, "ERROR (recursed) **: ", 21);
617 write (fd, "ERROR **: ", 10);
618 write (fd, message, strlen (message));
620 write (fd, "\naborting...\n", 13);
624 case G_LOG_LEVEL_CRITICAL:
625 ensure_stdout_valid ();
627 g_log_write_prefix (fd, log_level);
631 write (fd, log_domain, strlen (log_domain));
635 write (fd, "** ", 3);
637 write (fd, "CRITICAL (recursed) **: ", 24);
639 write (fd, "CRITICAL **: ", 13);
640 write (fd, message, strlen (message));
642 write (fd, "\naborting...\n", 13);
646 case G_LOG_LEVEL_WARNING:
647 ensure_stdout_valid ();
649 g_log_write_prefix (fd, log_level);
653 write (fd, log_domain, strlen (log_domain));
657 write (fd, "** ", 3);
659 write (fd, "WARNING (recursed) **: ", 23);
661 write (fd, "WARNING **: ", 12);
662 write (fd, message, strlen (message));
664 write (fd, "\naborting...\n", 13);
668 case G_LOG_LEVEL_MESSAGE:
669 ensure_stdout_valid ();
671 g_log_write_prefix (fd, log_level);
675 write (fd, log_domain, strlen (log_domain));
679 write (fd, "Message (recursed): ", 20);
681 write (fd, "Message: ", 9);
682 write (fd, message, strlen (message));
684 write (fd, "\naborting...\n", 13);
688 case G_LOG_LEVEL_INFO:
689 ensure_stdout_valid ();
691 g_log_write_prefix (fd, log_level);
695 write (fd, log_domain, strlen (log_domain));
699 write (fd, "INFO (recursed): ", 17);
701 write (fd, "INFO: ", 6);
702 write (fd, message, strlen (message));
704 write (fd, "\naborting...\n", 13);
708 case G_LOG_LEVEL_DEBUG:
709 ensure_stdout_valid ();
711 g_log_write_prefix (fd, log_level);
715 write (fd, log_domain, strlen (log_domain));
719 write (fd, "DEBUG (recursed): ", 18);
721 write (fd, "DEBUG: ", 7);
722 write (fd, message, strlen (message));
724 write (fd, "\naborting...\n", 13);
729 /* we are used for a log level that is not defined by GLib itself,
730 * try to make the best out of it.
732 ensure_stdout_valid ();
734 g_log_write_prefix (fd, log_level);
738 write (fd, log_domain, strlen (log_domain));
740 write (fd, "-LOG (recursed:", 15);
742 write (fd, "-LOG (", 6);
744 else if (in_recursion)
745 write (fd, "LOG (recursed:", 14);
747 write (fd, "LOG (", 5);
750 gchar string[] = "0x00): ";
751 gchar *p = string + 2;
754 i = g_bit_nth_msf (log_level, -1);
757 *p = '0' + (i & 0xf);
761 write (fd, string, 7);
764 write (fd, "): ", 3);
765 write (fd, message, strlen (message));
767 write (fd, "\naborting...\n", 13);
775 g_set_print_handler (GPrintFunc func)
777 GPrintFunc old_print_func;
779 g_mutex_lock (g_messages_lock);
780 old_print_func = glib_print_func;
781 glib_print_func = func;
782 g_mutex_unlock (g_messages_lock);
784 return old_print_func;
788 g_print (const gchar *format,
793 GPrintFunc local_glib_print_func;
795 g_return_if_fail (format != NULL);
797 va_start (args, format);
798 string = g_strdup_vprintf (format, args);
801 g_mutex_lock (g_messages_lock);
802 local_glib_print_func = glib_print_func;
803 g_mutex_unlock (g_messages_lock);
805 if (local_glib_print_func)
806 local_glib_print_func (string);
809 ensure_stdout_valid ();
810 fputs (string, stdout);
817 g_set_printerr_handler (GPrintFunc func)
819 GPrintFunc old_printerr_func;
821 g_mutex_lock (g_messages_lock);
822 old_printerr_func = glib_printerr_func;
823 glib_printerr_func = func;
824 g_mutex_unlock (g_messages_lock);
826 return old_printerr_func;
830 g_printerr (const gchar *format,
835 GPrintFunc local_glib_printerr_func;
837 g_return_if_fail (format != NULL);
839 va_start (args, format);
840 string = g_strdup_vprintf (format, args);
843 g_mutex_lock (g_messages_lock);
844 local_glib_printerr_func = glib_printerr_func;
845 g_mutex_unlock (g_messages_lock);
847 if (local_glib_printerr_func)
848 local_glib_printerr_func (string);
851 fputs (string, stderr);
858 # define MB_LEN_MAX 8
861 #ifndef HAVE_C99_VSNPRINTF
867 gboolean alternate_format, zero_padding, adjust_left, locale_grouping;
868 gboolean add_space, add_sign, possible_sign, seen_precision;
869 gboolean mod_half, mod_long, mod_extra_long;
873 printf_string_upper_bound (const gchar *format,
877 static const gboolean honour_longs = SIZEOF_LONG > 4 || SIZEOF_VOID_P > 4;
885 register gchar c = *format++;
889 else /* (c == '%') */
891 PrintfArgSpec spec = { 0, };
892 gboolean seen_l = FALSE, conv_done = FALSE;
894 const gchar *spec_start = format;
901 GDoubleIEEE754 u_double;
904 const gchar *v_string;
906 /* beware of positional parameters
910 g_warning (G_GNUC_PRETTY_FUNCTION
911 "(): unable to handle positional parameters (%%n$)");
912 len += 1024; /* try adding some safety padding */
919 spec.alternate_format = TRUE;
922 spec.zero_padding = TRUE;
925 spec.adjust_left = TRUE;
928 spec.add_space = TRUE;
931 spec.add_sign = TRUE;
934 spec.locale_grouping = TRUE;
937 /* parse output size specifications
940 spec.seen_precision = TRUE;
953 while (c >= '0' && c <= '9')
956 v_uint = v_uint * 10 + c - '0';
959 if (spec.seen_precision)
960 spec.precision = MAX (spec.precision, v_uint);
962 spec.min_width = MAX (spec.min_width, v_uint);
965 v_int = va_arg (args, int);
966 if (spec.seen_precision)
968 /* forget about negative precision */
970 spec.precision = MAX (spec.precision, v_int);
977 spec.adjust_left = TRUE;
979 spec.min_width = MAX (spec.min_width, v_int);
983 /* parse type modifiers
986 spec.mod_half = TRUE;
991 spec.mod_long = TRUE;
995 /* else, fall through */
998 spec.mod_long = TRUE;
999 spec.mod_extra_long = TRUE;
1003 #if GLIB_SIZEOF_SIZE_T > 4
1004 spec.mod_long = TRUE;
1005 spec.mod_extra_long = TRUE;
1006 #endif /* GLIB_SIZEOF_SIZE_T > 4 */
1009 #if GLIB_SIZEOF_PTRDIFF_T > 4
1010 spec.mod_long = TRUE;
1011 spec.mod_extra_long = TRUE;
1012 #endif /* GLIB_SIZEOF_PTRDIFF_T > 4 */
1015 #if GLIB_SIZEOF_INTMAX_T > 4
1016 spec.mod_long = TRUE;
1017 spec.mod_extra_long = TRUE;
1018 #endif /* GLIB_SIZEOF_INTMAX_T > 4 */
1021 /* parse output conversions
1030 /* some C libraries feature long variants for these as well? */
1031 spec.mod_long = TRUE;
1038 conv_len += 1; /* sign */
1045 spec.possible_sign = TRUE;
1047 if (spec.mod_long && honour_longs)
1049 if (spec.mod_extra_long)
1051 if (spec.mod_extra_long)
1053 (void) va_arg (args, gint64);
1055 else if (spec.mod_long)
1056 (void) va_arg (args, long);
1058 (void) va_arg (args, int);
1070 spec.possible_sign = TRUE;
1071 /* n . dddddddddddddddddddddddd E +- eeee */
1072 conv_len += 1 + 1 + MAX (24, spec.precision) + 1 + 1 + 4;
1073 if (may_warn && spec.mod_extra_long)
1074 g_warning (G_GNUC_PRETTY_FUNCTION
1075 "(): unable to handle long double, collecting double only");
1076 #ifdef HAVE_LONG_DOUBLE
1077 #error need to implement special handling for long double
1079 u_double.v_double = va_arg (args, double);
1080 /* %f can expand up to all significant digits before '.' (308) */
1082 u_double.mpn.biased_exponent > 0 && u_double.mpn.biased_exponent < 2047)
1084 gint exp = u_double.mpn.biased_exponent;
1086 exp -= G_IEEE754_DOUBLE_BIAS;
1087 exp = exp * G_LOG_2_BASE_10 + 1;
1088 conv_len += ABS (exp); /* exp can be <0 */
1090 /* some printf() implementations require extra padding for rounding */
1092 /* we can't really handle locale specific grouping here */
1093 if (spec.locale_grouping)
1097 spec.mod_long = TRUE;
1100 conv_len += spec.mod_long ? MB_LEN_MAX : 1;
1101 (void) va_arg (args, int);
1104 spec.mod_long = TRUE;
1107 v_string = va_arg (args, char*);
1109 conv_len += 8; /* hold "(null)" */
1110 else if (spec.seen_precision)
1111 conv_len += spec.precision;
1113 conv_len += strlen (v_string);
1118 g_warning (G_GNUC_PRETTY_FUNCTION
1119 "(): unable to handle wide char strings");
1120 len += 1024; /* try adding some safety padding */
1123 case 'P': /* do we actually need this? */
1126 spec.alternate_format = TRUE;
1133 (void) va_arg (args, void*);
1136 /* there's not much we can do to be clever */
1137 v_string = g_strerror (errno);
1138 v_uint = v_string ? strlen (v_string) : 0;
1139 conv_len += MAX (256, v_uint);
1142 /* handle invalid cases
1145 /* no conversion specification, bad bad */
1146 conv_len += format - spec_start;
1150 g_warning (G_GNUC_PRETTY_FUNCTION
1151 "(): unable to handle `%c' while parsing format",
1155 conv_done |= conv_len > 0;
1158 /* handle width specifications */
1159 conv_len = MAX (conv_len, MAX (spec.precision, spec.min_width));
1161 conv_len += spec.alternate_format ? 2 : 0;
1162 conv_len += (spec.add_space || spec.add_sign || spec.possible_sign);
1165 } /* else (c == '%') */
1166 } /* while (*format) */
1171 #endif /* !HAVE_C99_VSNPRINTF */
1175 g_printf_string_upper_bound (const gchar *format,
1178 #if HAVE_C99_VSNPRINTF
1180 return vsnprintf (&c, 1, format, args) + 1;
1182 return printf_string_upper_bound (format, TRUE, args);
1187 g_messages_init (void)
1189 g_messages_lock = g_mutex_new();
1190 g_log_depth = g_private_new(NULL);