glib/gmessages.c

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   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.
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 /*
  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/.
  25  */
  26
  27 /*
  28  * MT safe
  29  */
  30
  31 #include "config.h"
  32
  33 #include <stdlib.h>
  34 #include <stdarg.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #ifdef HAVE_UNISTD_H
  38 #include <unistd.h>
  39 #endif
  40 #include <signal.h>
  41 #include <locale.h>
  42 #include <errno.h>
  43
  44 #include "glib.h"
  45 #include "gdebug.h"
  46 #include "gprintfint.h"
  47 #include "gthreadinit.h"
  48 #include "galias.h"
  49
  50 #ifdef G_OS_WIN32
  51 #include <process.h>            /* For getpid() */
  52 #include <io.h>
  53 #  define STRICT                /* Strict typing, please */
  54 #  define _WIN32_WINDOWS 0x0401 /* to get IsDebuggerPresent */
  55 #  include <windows.h>
  56 #  undef STRICT
  57 #endif
  58
  59 /* --- structures --- */
  60 typedef struct _GLogDomain      GLogDomain;
  61 typedef struct _GLogHandler     GLogHandler;
  62 struct _GLogDomain
  63 {
  64   gchar         *log_domain;
  65   GLogLevelFlags fatal_mask;
  66   GLogHandler   *handlers;
  67   GLogDomain    *next;
  68 };
  69 struct _GLogHandler
  70 {
  71   guint          id;
  72   GLogLevelFlags log_level;
  73   GLogFunc       log_func;
  74   gpointer       data;
  75   GLogHandler   *next;
  76 };
  77
  78
  79 /* --- variables --- */
  80 static GMutex        *g_messages_lock = NULL;
  81 static GLogDomain    *g_log_domains = NULL;
  82 static GLogLevelFlags g_log_always_fatal = G_LOG_FATAL_MASK;
  83 static GPrintFunc     glib_print_func = NULL;
  84 static GPrintFunc     glib_printerr_func = NULL;
  85 static GPrivate      *g_log_depth = NULL;
  86 static GLogLevelFlags g_log_msg_prefix = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_DEBUG;
  87 static GLogFunc       default_log_func = g_log_default_handler;
  88 static gpointer       default_log_data = NULL;
  89
  90 /* --- functions --- */
  91 #ifdef G_OS_WIN32
  92 #  define STRICT
  93 #  include <windows.h>
  94 #  undef STRICT
  95 static gboolean win32_keep_fatal_message = FALSE;
  96
  97 /* This default message will usually be overwritten. */
  98 /* Yes, a fixed size buffer is bad. So sue me. But g_error() is never
  99  * called with huge strings, is it?
 100  */
 101 static gchar  fatal_msg_buf[1000] = "Unspecified fatal error encountered, aborting.";
 102 static gchar *fatal_msg_ptr = fatal_msg_buf;
 103
 104 #undef write
 105 static inline int
 106 dowrite (int          fd,
 107          const void  *buf,
 108          unsigned int len)
 109 {
 110   if (win32_keep_fatal_message)
 111     {
 112       memcpy (fatal_msg_ptr, buf, len);
 113       fatal_msg_ptr += len;
 114       *fatal_msg_ptr = 0;
 115       return len;
 116     }
 117
 118   write (fd, buf, len);
 119
 120   return len;
 121 }
 122 #define write(fd, buf, len) dowrite(fd, buf, len)
 123
 124 #endif
 125
 126 static void
 127 write_string (int          fd,
 128               const gchar *string)
 129 {
 130   write (fd, string, strlen (string));
 131 }
 132
 133 static void
 134 g_messages_prefixed_init (void)
 135 {
 136   static gboolean initialized = FALSE;
 137
 138   if (!initialized)
 139     {
 140       const gchar *val;
 141
 142       initialized = TRUE;
 143       val = g_getenv ("G_MESSAGES_PREFIXED");
 144
 145       if (val)
 146         {
 147           static const GDebugKey keys[] = {
 148             { "error", G_LOG_LEVEL_ERROR },
 149             { "critical", G_LOG_LEVEL_CRITICAL },
 150             { "warning", G_LOG_LEVEL_WARNING },
 151             { "message", G_LOG_LEVEL_MESSAGE },
 152             { "info", G_LOG_LEVEL_INFO },
 153             { "debug", G_LOG_LEVEL_DEBUG }
 154           };
 155
 156           g_log_msg_prefix = g_parse_debug_string (val, keys, G_N_ELEMENTS (keys));
 157         }
 158     }
 159 }
 160
 161 static GLogDomain*
 162 g_log_find_domain_L (const gchar *log_domain)
 163 {
 164   register GLogDomain *domain;
 165
 166   domain = g_log_domains;
 167   while (domain)
 168     {
 169       if (strcmp (domain->log_domain, log_domain) == 0)
 170         return domain;
 171       domain = domain->next;
 172     }
 173   return NULL;
 174 }
 175
 176 static GLogDomain*
 177 g_log_domain_new_L (const gchar *log_domain)
 178 {
 179   register GLogDomain *domain;
 180
 181   domain = g_new (GLogDomain, 1);
 182   domain->log_domain = g_strdup (log_domain);
 183   domain->fatal_mask = G_LOG_FATAL_MASK;
 184   domain->handlers = NULL;
 185
 186   domain->next = g_log_domains;
 187   g_log_domains = domain;
 188
 189   return domain;
 190 }
 191
 192 static void
 193 g_log_domain_check_free_L (GLogDomain *domain)
 194 {
 195   if (domain->fatal_mask == G_LOG_FATAL_MASK &&
 196       domain->handlers == NULL)
 197     {
 198       register GLogDomain *last, *work;
 199
 200       last = NULL;
 201
 202       work = g_log_domains;
 203       while (work)
 204         {
 205           if (work == domain)
 206             {
 207               if (last)
 208                 last->next = domain->next;
 209               else
 210                 g_log_domains = domain->next;
 211               g_free (domain->log_domain);
 212               g_free (domain);
 213               break;
 214             }
 215           last = work;
 216           work = last->next;
 217         }
 218     }
 219 }
 220
 221 static GLogFunc
 222 g_log_domain_get_handler_L (GLogDomain  *domain,
 223                             GLogLevelFlags log_level,
 224                             gpointer    *data)
 225 {
 226   if (domain && log_level)
 227     {
 228       register GLogHandler *handler;
 229
 230       handler = domain->handlers;
 231       while (handler)
 232         {
 233           if ((handler->log_level & log_level) == log_level)
 234             {
 235               *data = handler->data;
 236               return handler->log_func;
 237             }
 238           handler = handler->next;
 239         }
 240     }
 241
 242   *data = default_log_data;
 243   return default_log_func;
 244 }
 245
 246 GLogLevelFlags
 247 g_log_set_always_fatal (GLogLevelFlags fatal_mask)
 248 {
 249   GLogLevelFlags old_mask;
 250
 251   /* restrict the global mask to levels that are known to glib
 252    * since this setting applies to all domains
 253    */
 254   fatal_mask &= (1 << G_LOG_LEVEL_USER_SHIFT) - 1;
 255   /* force errors to be fatal */
 256   fatal_mask |= G_LOG_LEVEL_ERROR;
 257   /* remove bogus flag */
 258   fatal_mask &= ~G_LOG_FLAG_FATAL;
 259
 260   g_mutex_lock (g_messages_lock);
 261   old_mask = g_log_always_fatal;
 262   g_log_always_fatal = fatal_mask;
 263   g_mutex_unlock (g_messages_lock);
 264
 265   return old_mask;
 266 }
 267
 268 GLogLevelFlags
 269 g_log_set_fatal_mask (const gchar   *log_domain,
 270                       GLogLevelFlags fatal_mask)
 271 {
 272   GLogLevelFlags old_flags;
 273   register GLogDomain *domain;
 274
 275   if (!log_domain)
 276     log_domain = "";
 277
 278   /* force errors to be fatal */
 279   fatal_mask |= G_LOG_LEVEL_ERROR;
 280   /* remove bogus flag */
 281   fatal_mask &= ~G_LOG_FLAG_FATAL;
 282
 283   g_mutex_lock (g_messages_lock);
 284
 285   domain = g_log_find_domain_L (log_domain);
 286   if (!domain)
 287     domain = g_log_domain_new_L (log_domain);
 288   old_flags = domain->fatal_mask;
 289
 290   domain->fatal_mask = fatal_mask;
 291   g_log_domain_check_free_L (domain);
 292
 293   g_mutex_unlock (g_messages_lock);
 294
 295   return old_flags;
 296 }
 297
 298 guint
 299 g_log_set_handler (const gchar   *log_domain,
 300                    GLogLevelFlags log_levels,
 301                    GLogFunc       log_func,
 302                    gpointer       user_data)
 303 {
 304   static guint handler_id = 0;
 305   GLogDomain *domain;
 306   GLogHandler *handler;
 307
 308   g_return_val_if_fail ((log_levels & G_LOG_LEVEL_MASK) != 0, 0);
 309   g_return_val_if_fail (log_func != NULL, 0);
 310
 311   if (!log_domain)
 312     log_domain = "";
 313
 314   handler = g_new (GLogHandler, 1);
 315
 316   g_mutex_lock (g_messages_lock);
 317
 318   domain = g_log_find_domain_L (log_domain);
 319   if (!domain)
 320     domain = g_log_domain_new_L (log_domain);
 321
 322   handler->id = ++handler_id;
 323   handler->log_level = log_levels;
 324   handler->log_func = log_func;
 325   handler->data = user_data;
 326   handler->next = domain->handlers;
 327   domain->handlers = handler;
 328
 329   g_mutex_unlock (g_messages_lock);
 330
 331   return handler_id;
 332 }
 333
 334 GLogFunc
 335 g_log_set_default_handler (GLogFunc log_func,
 336                            gpointer user_data)
 337 {
 338   GLogFunc old_log_func;
 339
 340   g_mutex_lock (g_messages_lock);
 341   old_log_func = default_log_func;
 342   default_log_func = log_func;
 343   default_log_data = user_data;
 344   g_mutex_unlock (g_messages_lock);
 345
 346   return old_log_func;
 347 }
 348
 349 void
 350 g_log_remove_handler (const gchar *log_domain,
 351                       guint        handler_id)
 352 {
 353   register GLogDomain *domain;
 354
 355   g_return_if_fail (handler_id > 0);
 356
 357   if (!log_domain)
 358     log_domain = "";
 359
 360   g_mutex_lock (g_messages_lock);
 361   domain = g_log_find_domain_L (log_domain);
 362   if (domain)
 363     {
 364       GLogHandler *work, *last;
 365
 366       last = NULL;
 367       work = domain->handlers;
 368       while (work)
 369         {
 370           if (work->id == handler_id)
 371             {
 372               if (last)
 373                 last->next = work->next;
 374               else
 375                 domain->handlers = work->next;
 376               g_log_domain_check_free_L (domain);
 377               g_mutex_unlock (g_messages_lock);
 378               g_free (work);
 379               return;
 380             }
 381           last = work;
 382           work = last->next;
 383         }
 384     }
 385   g_mutex_unlock (g_messages_lock);
 386   g_warning ("%s: could not find handler with id `%d' for domain \"%s\"",
 387              G_STRLOC, handler_id, log_domain);
 388 }
 389
 390 void
 391 g_logv (const gchar   *log_domain,
 392         GLogLevelFlags log_level,
 393         const gchar   *format,
 394         va_list        args1)
 395 {
 396   gboolean was_fatal = (log_level & G_LOG_FLAG_FATAL) != 0;
 397   gboolean was_recursion = (log_level & G_LOG_FLAG_RECURSION) != 0;
 398   gint i;
 399
 400   log_level &= G_LOG_LEVEL_MASK;
 401   if (!log_level)
 402     return;
 403
 404   for (i = g_bit_nth_msf (log_level, -1); i >= 0; i = g_bit_nth_msf (log_level, i))
 405     {
 406       register GLogLevelFlags test_level;
 407
 408       test_level = 1 << i;
 409       if (log_level & test_level)
 410         {
 411           guint depth = GPOINTER_TO_UINT (g_private_get (g_log_depth));
 412           GLogDomain *domain;
 413           GLogFunc log_func;
 414           GLogLevelFlags domain_fatal_mask;
 415           gpointer data = NULL;
 416
 417           if (was_fatal)
 418             test_level |= G_LOG_FLAG_FATAL;
 419           if (was_recursion)
 420             test_level |= G_LOG_FLAG_RECURSION;
 421
 422           /* check recursion and lookup handler */
 423           g_mutex_lock (g_messages_lock);
 424           domain = g_log_find_domain_L (log_domain ? log_domain : "");
 425           if (depth)
 426             test_level |= G_LOG_FLAG_RECURSION;
 427           depth++;
 428           domain_fatal_mask = domain ? domain->fatal_mask : G_LOG_FATAL_MASK;
 429           if ((domain_fatal_mask | g_log_always_fatal) & test_level)
 430             test_level |= G_LOG_FLAG_FATAL;
 431           if (test_level & G_LOG_FLAG_RECURSION)
 432             log_func = _g_log_fallback_handler;
 433           else
 434             log_func = g_log_domain_get_handler_L (domain, test_level, &data);
 435           domain = NULL;
 436           g_mutex_unlock (g_messages_lock);
 437
 438           g_private_set (g_log_depth, GUINT_TO_POINTER (depth));
 439
 440           /* had to defer debug initialization until we can keep track of recursion */
 441           if (!(test_level & G_LOG_FLAG_RECURSION) && !_g_debug_initialized)
 442             {
 443               GLogLevelFlags orig_test_level = test_level;
 444
 445               _g_debug_init ();
 446               if ((domain_fatal_mask | g_log_always_fatal) & test_level)
 447                 test_level |= G_LOG_FLAG_FATAL;
 448               if (test_level != orig_test_level)
 449                 {
 450                   /* need a relookup, not nice, but not too bad either */
 451                   g_mutex_lock (g_messages_lock);
 452                   domain = g_log_find_domain_L (log_domain ? log_domain : "");
 453                   log_func = g_log_domain_get_handler_L (domain, test_level, &data);
 454                   domain = NULL;
 455                   g_mutex_unlock (g_messages_lock);
 456                 }
 457             }
 458
 459           if (test_level & G_LOG_FLAG_RECURSION)
 460             {
 461               /* we use a stack buffer of fixed size, since we're likely
 462                * in an out-of-memory situation
 463                */
 464               gchar buffer[1025];
 465               gint size;
 466               size = _g_vsnprintf (buffer, 1024, format, args1);
 467
 468               log_func (log_domain, test_level, buffer, data);
 469             }
 470           else
 471             {
 472               gchar *msg = g_strdup_vprintf (format, args1);
 473
 474               log_func (log_domain, test_level, msg, data);
 475
 476               g_free (msg);
 477             }
 478
 479           if (test_level & G_LOG_FLAG_FATAL)
 480             {
 481 #ifdef G_OS_WIN32
 482               gchar *locale_msg = g_locale_from_utf8 (fatal_msg_buf, -1, NULL, NULL, NULL);
 483
 484               MessageBox (NULL, locale_msg, NULL,
 485                           MB_ICONERROR|MB_SETFOREGROUND);
 486               if (IsDebuggerPresent () && !(test_level & G_LOG_FLAG_RECURSION))
 487                 G_BREAKPOINT ();
 488
 489               abort ();
 490 #else
 491 #if defined (G_ENABLE_DEBUG) && defined (SIGTRAP)
 492               if (!(test_level & G_LOG_FLAG_RECURSION))
 493                 G_BREAKPOINT ();
 494               else
 495                 abort ();
 496 #else /* !G_ENABLE_DEBUG || !SIGTRAP */
 497               abort ();
 498 #endif /* !G_ENABLE_DEBUG || !SIGTRAP */
 499 #endif /* !G_OS_WIN32 */
 500             }
 501
 502           depth--;
 503           g_private_set (g_log_depth, GUINT_TO_POINTER (depth));
 504         }
 505     }
 506 }
 507
 508 void
 509 g_log (const gchar   *log_domain,
 510        GLogLevelFlags log_level,
 511        const gchar   *format,
 512        ...)
 513 {
 514   va_list args;
 515
 516   va_start (args, format);
 517   g_logv (log_domain, log_level, format, args);
 518   va_end (args);
 519 }
 520
 521 void
 522 g_return_if_fail_warning (const char *log_domain,
 523                           const char *pretty_function,
 524                           const char *expression)
 525 {
 526   /*
 527    * Omit the prefix used by the PLT-reduction
 528    * technique used in GTK+.
 529    */
 530   if (g_str_has_prefix (pretty_function, "IA__"))
 531     pretty_function += 4;
 532   g_log (log_domain,
 533          G_LOG_LEVEL_CRITICAL,
 534          "%s: assertion `%s' failed",
 535          pretty_function,
 536          expression);
 537 }
 538
 539 void
 540 g_assert_warning (const char *log_domain,
 541                   const char *file,
 542                   const int   line,
 543                   const char *pretty_function,
 544                   const char *expression)
 545 {
 546   /*
 547    * Omit the prefix used by the PLT-reduction
 548    * technique used in GTK+.
 549    */
 550   if (g_str_has_prefix (pretty_function, "IA__"))
 551     pretty_function += 4;
 552   g_log (log_domain,
 553          G_LOG_LEVEL_ERROR,
 554          expression
 555          ? "file %s: line %d (%s): assertion failed: (%s)"
 556          : "file %s: line %d (%s): should not be reached",
 557          file,
 558          line,
 559          pretty_function,
 560          expression);
 561   abort ();
 562 }
 563
 564 #define CHAR_IS_SAFE(wc) (!((wc < 0x20 && wc != '\t' && wc != '\n' && wc != '\r') || \
 565                             (wc == 0x7f) || \
 566                             (wc >= 0x80 && wc < 0xa0)))
 567
 568 static gchar*
 569 strdup_convert (const gchar *string,
 570                 const gchar *charset)
 571 {
 572   if (!g_utf8_validate (string, -1, NULL))
 573     {
 574       GString *gstring = g_string_new ("[Invalid UTF-8] ");
 575       guchar *p;
 576
 577       for (p = (guchar *)string; *p; p++)
 578         {
 579           if (CHAR_IS_SAFE(*p) &&
 580               !(*p == '\r' && *(p + 1) != '\n') &&
 581               *p < 0x80)
 582             g_string_append_c (gstring, *p);
 583           else
 584             g_string_append_printf (gstring, "\\x%02x", (guint)(guchar)*p);
 585         }
 586
 587       return g_string_free (gstring, FALSE);
 588     }
 589   else
 590     {
 591       GError *err = NULL;
 592
 593       gchar *result = g_convert_with_fallback (string, -1, charset, "UTF-8", "?", NULL, NULL, &err);
 594       if (result)
 595         return result;
 596       else
 597         {
 598           /* Not thread-safe, but doesn't matter if we print the warning twice
 599            */
 600           static gboolean warned = FALSE;
 601           if (!warned)
 602             {
 603               warned = TRUE;
 604               _g_fprintf (stderr, "GLib: Cannot convert message: %s\n", err->message);
 605             }
 606           g_error_free (err);
 607
 608           return g_strdup (string);
 609         }
 610     }
 611 }
 612
 613 /* For a radix of 8 we need at most 3 output bytes for 1 input
 614  * byte. Additionally we might need up to 2 output bytes for the
 615  * readix prefix and 1 byte for the trailing NULL.
 616  */
 617 #define FORMAT_UNSIGNED_BUFSIZE ((GLIB_SIZEOF_LONG * 3) + 3)
 618
 619 static void
 620 format_unsigned (gchar  *buf,
 621                  gulong  num,
 622                  guint   radix)
 623 {
 624   gulong tmp;
 625   gchar c;
 626   gint i, n;
 627
 628   /* we may not call _any_ GLib functions here (or macros like g_return_if_fail()) */
 629
 630   if (radix != 8 && radix != 10 && radix != 16)
 631     {
 632       *buf = '\000';
 633       return;
 634     }
 635
 636   if (!num)
 637     {
 638       *buf++ = '0';
 639       *buf = '\000';
 640       return;
 641     }
 642
 643   if (radix == 16)
 644     {
 645       *buf++ = '0';
 646       *buf++ = 'x';
 647     }
 648   else if (radix == 8)
 649     {
 650       *buf++ = '0';
 651     }
 652
 653   n = 0;
 654   tmp = num;
 655   while (tmp)
 656     {
 657       tmp /= radix;
 658       n++;
 659     }
 660
 661   i = n;
 662
 663   /* Again we can't use g_assert; actually this check should _never_ fail. */
 664   if (n > FORMAT_UNSIGNED_BUFSIZE - 3)
 665     {
 666       *buf = '\000';
 667       return;
 668     }
 669
 670   while (num)
 671     {
 672       i--;
 673       c = (num % radix);
 674       if (c < 10)
 675         buf[i] = c + '0';
 676       else
 677         buf[i] = c + 'a' - 10;
 678       num /= radix;
 679     }
 680
 681   buf[n] = '\000';
 682 }
 683
 684 /* string size big enough to hold level prefix */
 685 #define STRING_BUFFER_SIZE      (FORMAT_UNSIGNED_BUFSIZE + 32)
 686
 687 #define ALERT_LEVELS            (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING)
 688
 689 static int
 690 mklevel_prefix (gchar          level_prefix[STRING_BUFFER_SIZE],
 691                 GLogLevelFlags log_level)
 692 {
 693   gboolean to_stdout = TRUE;
 694
 695   /* we may not call _any_ GLib functions here */
 696
 697   switch (log_level & G_LOG_LEVEL_MASK)
 698     {
 699     case G_LOG_LEVEL_ERROR:
 700       strcpy (level_prefix, "ERROR");
 701       to_stdout = FALSE;
 702       break;
 703     case G_LOG_LEVEL_CRITICAL:
 704       strcpy (level_prefix, "CRITICAL");
 705       to_stdout = FALSE;
 706       break;
 707     case G_LOG_LEVEL_WARNING:
 708       strcpy (level_prefix, "WARNING");
 709       to_stdout = FALSE;
 710       break;
 711     case G_LOG_LEVEL_MESSAGE:
 712       strcpy (level_prefix, "Message");
 713       to_stdout = FALSE;
 714       break;
 715     case G_LOG_LEVEL_INFO:
 716       strcpy (level_prefix, "INFO");
 717       break;
 718     case G_LOG_LEVEL_DEBUG:
 719       strcpy (level_prefix, "DEBUG");
 720       break;
 721     default:
 722       if (log_level)
 723         {
 724           strcpy (level_prefix, "LOG-");
 725           format_unsigned (level_prefix + 4, log_level & G_LOG_LEVEL_MASK, 16);
 726         }
 727       else
 728         strcpy (level_prefix, "LOG");
 729       break;
 730     }
 731   if (log_level & G_LOG_FLAG_RECURSION)
 732     strcat (level_prefix, " (recursed)");
 733   if (log_level & ALERT_LEVELS)
 734     strcat (level_prefix, " **");
 735
 736 #ifdef G_OS_WIN32
 737   win32_keep_fatal_message = (log_level & G_LOG_FLAG_FATAL) != 0;
 738 #endif
 739   return to_stdout ? 1 : 2;
 740 }
 741
 742 void
 743 _g_log_fallback_handler (const gchar   *log_domain,
 744                          GLogLevelFlags log_level,
 745                          const gchar   *message,
 746                          gpointer       unused_data)
 747 {
 748   gchar level_prefix[STRING_BUFFER_SIZE];
 749 #ifndef G_OS_WIN32
 750   gchar pid_string[FORMAT_UNSIGNED_BUFSIZE];
 751 #endif
 752   gboolean is_fatal = (log_level & G_LOG_FLAG_FATAL) != 0;
 753   int fd;
 754
 755   /* we can not call _any_ GLib functions in this fallback handler,
 756    * which is why we skip UTF-8 conversion, etc.
 757    * since we either recursed or ran out of memory, we're in a pretty
 758    * pathologic situation anyways, what we can do is giving the
 759    * the process ID unconditionally however.
 760    */
 761
 762   fd = mklevel_prefix (level_prefix, log_level);
 763   if (!message)
 764     message = "(NULL) message";
 765
 766 #ifndef G_OS_WIN32
 767   format_unsigned (pid_string, getpid (), 10);
 768 #endif
 769
 770   if (log_domain)
 771     write_string (fd, "\n");
 772   else
 773     write_string (fd, "\n** ");
 774
 775 #ifndef G_OS_WIN32
 776   write_string (fd, "(process:");
 777   write_string (fd, pid_string);
 778   write_string (fd, "): ");
 779 #endif
 780
 781   if (log_domain)
 782     {
 783       write_string (fd, log_domain);
 784       write_string (fd, "-");
 785     }
 786   write_string (fd, level_prefix);
 787   write_string (fd, ": ");
 788   write_string (fd, message);
 789   if (is_fatal)
 790     write_string (fd, "\naborting...\n");
 791   else
 792     write_string (fd, "\n");
 793 }
 794
 795 static void
 796 escape_string (GString *string)
 797 {
 798   const char *p = string->str;
 799   gunichar wc;
 800
 801   while (p < string->str + string->len)
 802     {
 803       gboolean safe;
 804
 805       wc = g_utf8_get_char_validated (p, -1);
 806       if (wc == (gunichar)-1 || wc == (gunichar)-2)
 807         {
 808           gchar *tmp;
 809           guint pos;
 810
 811           pos = p - string->str;
 812
 813           /* Emit invalid UTF-8 as hex escapes
 814            */
 815           tmp = g_strdup_printf ("\\x%02x", (guint)(guchar)*p);
 816           g_string_erase (string, pos, 1);
 817           g_string_insert (string, pos, tmp);
 818
 819           p = string->str + (pos + 4); /* Skip over escape sequence */
 820
 821           g_free (tmp);
 822           continue;
 823         }
 824       if (wc == '\r')
 825         {
 826           safe = *(p + 1) == '\n';
 827         }
 828       else
 829         {
 830           safe = CHAR_IS_SAFE (wc);
 831         }
 832
 833       if (!safe)
 834         {
 835           gchar *tmp;
 836           guint pos;
 837
 838           pos = p - string->str;
 839
 840           /* Largest char we escape is 0x0a, so we don't have to worry
 841            * about 8-digit \Uxxxxyyyy
 842            */
 843           tmp = g_strdup_printf ("\\u%04x", wc);
 844           g_string_erase (string, pos, g_utf8_next_char (p) - p);
 845           g_string_insert (string, pos, tmp);
 846           g_free (tmp);
 847
 848           p = string->str + (pos + 6); /* Skip over escape sequence */
 849         }
 850       else
 851         p = g_utf8_next_char (p);
 852     }
 853 }
 854
 855 void
 856 g_log_default_handler (const gchar   *log_domain,
 857                        GLogLevelFlags log_level,
 858                        const gchar   *message,
 859                        gpointer       unused_data)
 860 {
 861   gboolean is_fatal = (log_level & G_LOG_FLAG_FATAL) != 0;
 862   gchar level_prefix[STRING_BUFFER_SIZE], *string;
 863   GString *gstring;
 864   int fd;
 865
 866   /* we can be called externally with recursion for whatever reason */
 867   if (log_level & G_LOG_FLAG_RECURSION)
 868     {
 869       _g_log_fallback_handler (log_domain, log_level, message, unused_data);
 870       return;
 871     }
 872
 873   g_messages_prefixed_init ();
 874
 875   fd = mklevel_prefix (level_prefix, log_level);
 876
 877   gstring = g_string_new (NULL);
 878   if (log_level & ALERT_LEVELS)
 879     g_string_append (gstring, "\n");
 880   if (!log_domain)
 881     g_string_append (gstring, "** ");
 882
 883   if ((g_log_msg_prefix & log_level) == log_level)
 884     {
 885       const gchar *prg_name = g_get_prgname ();
 886
 887       if (!prg_name)
 888         g_string_append_printf (gstring, "(process:%lu): ", (gulong)getpid ());
 889       else
 890         g_string_append_printf (gstring, "(%s:%lu): ", prg_name, (gulong)getpid ());
 891     }
 892
 893   if (log_domain)
 894     {
 895       g_string_append (gstring, log_domain);
 896       g_string_append_c (gstring, '-');
 897     }
 898   g_string_append (gstring, level_prefix);
 899
 900   g_string_append (gstring, ": ");
 901   if (!message)
 902     g_string_append (gstring, "(NULL) message");
 903   else
 904     {
 905       GString *msg;
 906       const gchar *charset;
 907
 908       msg = g_string_new (message);
 909       escape_string (msg);
 910
 911       if (g_get_charset (&charset))
 912         g_string_append (gstring, msg->str);    /* charset is UTF-8 already */
 913       else
 914         {
 915           string = strdup_convert (msg->str, charset);
 916           g_string_append (gstring, string);
 917           g_free (string);
 918         }
 919
 920       g_string_free (msg, TRUE);
 921     }
 922   if (is_fatal)
 923     g_string_append (gstring, "\naborting...\n");
 924   else
 925     g_string_append (gstring, "\n");
 926
 927   string = g_string_free (gstring, FALSE);
 928
 929   write_string (fd, string);
 930   g_free (string);
 931 }
 932
 933 GPrintFunc
 934 g_set_print_handler (GPrintFunc func)
 935 {
 936   GPrintFunc old_print_func;
 937
 938   g_mutex_lock (g_messages_lock);
 939   old_print_func = glib_print_func;
 940   glib_print_func = func;
 941   g_mutex_unlock (g_messages_lock);
 942
 943   return old_print_func;
 944 }
 945
 946 void
 947 g_print (const gchar *format,
 948          ...)
 949 {
 950   va_list args;
 951   gchar *string;
 952   GPrintFunc local_glib_print_func;
 953
 954   g_return_if_fail (format != NULL);
 955
 956   va_start (args, format);
 957   string = g_strdup_vprintf (format, args);
 958   va_end (args);
 959
 960   g_mutex_lock (g_messages_lock);
 961   local_glib_print_func = glib_print_func;
 962   g_mutex_unlock (g_messages_lock);
 963
 964   if (local_glib_print_func)
 965     local_glib_print_func (string);
 966   else
 967     {
 968       const gchar *charset;
 969
 970       if (g_get_charset (&charset))
 971         fputs (string, stdout); /* charset is UTF-8 already */
 972       else
 973         {
 974           gchar *lstring = strdup_convert (string, charset);
 975
 976           fputs (lstring, stdout);
 977           g_free (lstring);
 978         }
 979       fflush (stdout);
 980     }
 981   g_free (string);
 982 }
 983
 984 GPrintFunc
 985 g_set_printerr_handler (GPrintFunc func)
 986 {
 987   GPrintFunc old_printerr_func;
 988
 989   g_mutex_lock (g_messages_lock);
 990   old_printerr_func = glib_printerr_func;
 991   glib_printerr_func = func;
 992   g_mutex_unlock (g_messages_lock);
 993
 994   return old_printerr_func;
 995 }
 996
 997 void
 998 g_printerr (const gchar *format,
 999             ...)
1000 {
1001   va_list args;
1002   gchar *string;
1003   GPrintFunc local_glib_printerr_func;
1004
1005   g_return_if_fail (format != NULL);
1006
1007   va_start (args, format);
1008   string = g_strdup_vprintf (format, args);
1009   va_end (args);
1010
1011   g_mutex_lock (g_messages_lock);
1012   local_glib_printerr_func = glib_printerr_func;
1013   g_mutex_unlock (g_messages_lock);
1014
1015   if (local_glib_printerr_func)
1016     local_glib_printerr_func (string);
1017   else
1018     {
1019       const gchar *charset;
1020
1021       if (g_get_charset (&charset))
1022         fputs (string, stderr); /* charset is UTF-8 already */
1023       else
1024         {
1025           gchar *lstring = strdup_convert (string, charset);
1026
1027           fputs (lstring, stderr);
1028           g_free (lstring);
1029         }
1030       fflush (stderr);
1031     }
1032   g_free (string);
1033 }
1034
1035 gsize
1036 g_printf_string_upper_bound (const gchar *format,
1037                              va_list      args)
1038 {
1039   gchar c;
1040   return _g_vsnprintf (&c, 1, format, args) + 1;
1041 }
1042
1043 void
1044 _g_messages_thread_init_nomessage (void)
1045 {
1046   g_messages_lock = g_mutex_new ();
1047   g_log_depth = g_private_new (NULL);
1048   g_messages_prefixed_init ();
1049   _g_debug_init ();
1050 }
1051
1052 gboolean _g_debug_initialized = FALSE;
1053 guint _g_debug_flags = 0;
1054
1055 void
1056 _g_debug_init (void)
1057 {
1058   const gchar *val;
1059
1060   _g_debug_initialized = TRUE;
1061
1062   val = g_getenv ("G_DEBUG");
1063   if (val != NULL)
1064     {
1065       static const GDebugKey keys[] = {
1066         {"fatal_warnings", G_DEBUG_FATAL_WARNINGS},
1067         {"fatal_criticals", G_DEBUG_FATAL_CRITICALS}
1068       };
1069
1070       _g_debug_flags = g_parse_debug_string (val, keys, G_N_ELEMENTS (keys));
1071     }
1072
1073   if (_g_debug_flags & G_DEBUG_FATAL_WARNINGS)
1074     {
1075       GLogLevelFlags fatal_mask;
1076
1077       fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1078       fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1079       g_log_set_always_fatal (fatal_mask);
1080     }
1081
1082   if (_g_debug_flags & G_DEBUG_FATAL_CRITICALS)
1083     {
1084       GLogLevelFlags fatal_mask;
1085
1086       fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1087       fatal_mask |= G_LOG_LEVEL_CRITICAL;
1088       g_log_set_always_fatal (fatal_mask);
1089     }
1090 }
1091
1092 #define __G_MESSAGES_C__
1093 #include "galiasdef.c"