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glib/gmessages.c
Owen Taylor ac0bbb7605 Avoid using stderr to be as robust as possible in out-of-memory. 
Thu May 10 23:21:30 2001  Owen Taylor  <otaylor@redhat.com>

	* gmessages.c (g_log_write_prefix): Avoid using stderr
	to be as robust as possible in out-of-memory.

	* gmessages.c (g_log_default_handler): Remove some dead
	code.

	* gutils.c (g_parse_debug_string): Fix to avoid mallocs.
2001-05-14 14:53:59 +00:00

1256 lines
27 KiB
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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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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/.
*/
/*
* MT safe
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "glib.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <signal.h>
#include <locale.h>
#include <errno.h>
/* --- structures --- */
typedef struct _GLogDomain GLogDomain;
typedef struct _GLogHandler GLogHandler;
struct _GLogDomain
{
gchar *log_domain;
GLogLevelFlags fatal_mask;
GLogHandler *handlers;
GLogDomain *next;
};
struct _GLogHandler
{
guint id;
GLogLevelFlags log_level;
GLogFunc log_func;
gpointer data;
GLogHandler *next;
};
/* --- prototypes --- */
static inline guint printf_string_upper_bound (const gchar *format,
gboolean may_warn,
va_list args);
/* --- variables --- */
static GMutex* g_messages_lock = NULL;
const gchar *g_log_domain_glib = "GLib";
static GLogDomain *g_log_domains = NULL;
static GLogLevelFlags g_log_always_fatal = G_LOG_FATAL_MASK;
static GPrintFunc glib_print_func = NULL;
static GPrintFunc glib_printerr_func = NULL;
static GErrorFunc glib_error_func = NULL;
static GWarningFunc glib_warning_func = NULL;
static GPrintFunc glib_message_func = NULL;
static GPrivate* g_log_depth = NULL;
/* --- functions --- */
#ifdef G_OS_WIN32
# define STRICT
# include <windows.h>
# undef STRICT
# include <process.h> /* For _getpid() */
static gboolean alloc_console_called = FALSE;
static gboolean gonna_abort = FALSE;
/* This default message will usually be overwritten. */
/* Yes, a fixed size buffer is bad. So sue me. But g_error is never
* with huge strings, is it? */
static char fatal_msg_buf[1000] = "Unspecified fatal error encountered, aborting.";
static char *fatal_msg_ptr = fatal_msg_buf;
/* Just use stdio. If we're out of memory, we're hosed anyway. */
#undef write
static inline int
dowrite (FILE *fd,
const void *buf,
unsigned int len)
{
if (gonna_abort)
{
memcpy (fatal_msg_ptr, buf, len);
fatal_msg_ptr += len;
*fatal_msg_ptr = 0;
return len;
}
fwrite (buf, len, 1, fd);
fflush (fd);
return len;
}
#define write(fd, buf, len) dowrite(fd, buf, len)
static void
ensure_stdout_valid (void)
{
HANDLE handle;
if (gonna_abort)
return;
if (!alloc_console_called)
{
handle = GetStdHandle (STD_OUTPUT_HANDLE);
if (handle == INVALID_HANDLE_VALUE)
{
AllocConsole ();
alloc_console_called = TRUE;
freopen ("CONOUT$", "w", stdout);
}
}
}
#else
#define ensure_stdout_valid() /* Define as empty */
#endif
static void
write_unsigned (gint fd,
gulong num,
guint radix)
{
char buffer[64];
gulong tmp;
char c;
int i, n;
g_return_if_fail (radix >= 2 && radix <= 36);
if (!num)
{
write (fd, "0", 1);
return;
}
if (radix == 16)
write (fd, "0x", 2);
else if (radix == 8)
write (fd, "0", 1);
n = 0;
tmp = num;
while (tmp)
{
tmp /= radix;
n++;
}
i = n;
while (num)
{
i--;
c = (num % radix);
if (c < 10)
buffer[i] = c + '0';
else
buffer[i] = c + 'a' - 10;
num /= radix;
}
write (fd, buffer, n);
}
static void
write_string (gint fd,
gchar *string)
{
write (fd, string, strlen (string));
}
static void
g_log_write_prefix (gint fd,
GLogLevelFlags mask)
{
static GLogLevelFlags g_log_msg_prefix = G_LOG_LEVEL_ERROR | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_DEBUG;
static gboolean initialized = FALSE;
g_mutex_lock (g_messages_lock);
if (!initialized)
{
const gchar *val;
initialized = TRUE;
val = g_getenv ("G_MESSAGES_PREFIXED");
if (val)
{
static const GDebugKey keys[] = {
{ "error", G_LOG_LEVEL_ERROR },
{ "critical", G_LOG_LEVEL_CRITICAL },
{ "warning", G_LOG_LEVEL_WARNING },
{ "message", G_LOG_LEVEL_MESSAGE },
{ "info", G_LOG_LEVEL_INFO },
{ "debug", G_LOG_LEVEL_DEBUG }
};
g_log_msg_prefix = g_parse_debug_string (val, keys, G_N_ELEMENTS (keys));
}
}
g_mutex_unlock (g_messages_lock);
if ((g_log_msg_prefix & mask) == mask)
{
gchar *prg_name;
prg_name = g_get_prgname ();
if (!prg_name)
write_string (fd, "(process:");
else
{
write_string (fd, prg_name);
write_string (fd, " (pid:");
}
write_unsigned (fd, getpid (), 10);
write_string (fd, "): ");
}
}
static inline GLogDomain*
g_log_find_domain (const gchar *log_domain)
{
register GLogDomain *domain;
g_mutex_lock (g_messages_lock);
domain = g_log_domains;
while (domain)
{
if (strcmp (domain->log_domain, log_domain) == 0)
{
g_mutex_unlock (g_messages_lock);
return domain;
}
domain = domain->next;
}
g_mutex_unlock (g_messages_lock);
return NULL;
}
static inline GLogDomain*
g_log_domain_new (const gchar *log_domain)
{
register GLogDomain *domain;
domain = g_new (GLogDomain, 1);
domain->log_domain = g_strdup (log_domain);
domain->fatal_mask = G_LOG_FATAL_MASK;
domain->handlers = NULL;
g_mutex_lock (g_messages_lock);
domain->next = g_log_domains;
g_log_domains = domain;
g_mutex_unlock (g_messages_lock);
return domain;
}
static inline void
g_log_domain_check_free (GLogDomain *domain)
{
if (domain->fatal_mask == G_LOG_FATAL_MASK &&
domain->handlers == NULL)
{
register GLogDomain *last, *work;
last = NULL;
g_mutex_lock (g_messages_lock);
work = g_log_domains;
while (work)
{
if (work == domain)
{
if (last)
last->next = domain->next;
else
g_log_domains = domain->next;
g_free (domain->log_domain);
g_free (domain);
break;
}
last = work;
work = last->next;
}
g_mutex_unlock (g_messages_lock);
}
}
static inline GLogFunc
g_log_domain_get_handler (GLogDomain *domain,
GLogLevelFlags log_level,
gpointer *data)
{
if (domain && log_level)
{
register GLogHandler *handler;
handler = domain->handlers;
while (handler)
{
if ((handler->log_level & log_level) == log_level)
{
*data = handler->data;
return handler->log_func;
}
handler = handler->next;
}
}
return g_log_default_handler;
}
GLogLevelFlags
g_log_set_always_fatal (GLogLevelFlags fatal_mask)
{
GLogLevelFlags old_mask;
/* restrict the global mask to levels that are known to glib */
fatal_mask &= (1 << G_LOG_LEVEL_USER_SHIFT) - 1;
/* force errors to be fatal */
fatal_mask |= G_LOG_LEVEL_ERROR;
/* remove bogus flag */
fatal_mask &= ~G_LOG_FLAG_FATAL;
g_mutex_lock (g_messages_lock);
old_mask = g_log_always_fatal;
g_log_always_fatal = fatal_mask;
g_mutex_unlock (g_messages_lock);
return old_mask;
}
GLogLevelFlags
g_log_set_fatal_mask (const gchar *log_domain,
GLogLevelFlags fatal_mask)
{
GLogLevelFlags old_flags;
register GLogDomain *domain;
if (!log_domain)
log_domain = "";
/* force errors to be fatal */
fatal_mask |= G_LOG_LEVEL_ERROR;
/* remove bogus flag */
fatal_mask &= ~G_LOG_FLAG_FATAL;
domain = g_log_find_domain (log_domain);
if (!domain)
domain = g_log_domain_new (log_domain);
old_flags = domain->fatal_mask;
domain->fatal_mask = fatal_mask;
g_log_domain_check_free (domain);
return old_flags;
}
guint
g_log_set_handler (const gchar *log_domain,
GLogLevelFlags log_levels,
GLogFunc log_func,
gpointer user_data)
{
register GLogDomain *domain;
register GLogHandler *handler;
static guint handler_id = 0;
g_return_val_if_fail ((log_levels & G_LOG_LEVEL_MASK) != 0, 0);
g_return_val_if_fail (log_func != NULL, 0);
if (!log_domain)
log_domain = "";
domain = g_log_find_domain (log_domain);
if (!domain)
domain = g_log_domain_new (log_domain);
handler = g_new (GLogHandler, 1);
g_mutex_lock (g_messages_lock);
handler->id = ++handler_id;
g_mutex_unlock (g_messages_lock);
handler->log_level = log_levels;
handler->log_func = log_func;
handler->data = user_data;
handler->next = domain->handlers;
domain->handlers = handler;
return handler_id;
}
void
g_log_remove_handler (const gchar *log_domain,
guint handler_id)
{
register GLogDomain *domain;
g_return_if_fail (handler_id > 0);
if (!log_domain)
log_domain = "";
domain = g_log_find_domain (log_domain);
if (domain)
{
register GLogHandler *work, *last;
last = NULL;
work = domain->handlers;
while (work)
{
if (work->id == handler_id)
{
if (last)
last->next = work->next;
else
domain->handlers = work->next;
g_free (work);
g_log_domain_check_free (domain);
return;
}
last = work;
work = last->next;
}
}
g_warning ("g_log_remove_handler(): could not find handler with id `%d' for domain \"%s\"",
handler_id,
log_domain);
}
void
g_logv (const gchar *log_domain,
GLogLevelFlags log_level,
const gchar *format,
va_list args1)
{
va_list args2;
gchar buffer[1025];
register gint i;
log_level &= G_LOG_LEVEL_MASK;
if (!log_level)
return;
/* we use a stack buffer of fixed size, because we might get called
* recursively.
*/
G_VA_COPY (args2, args1);
if (printf_string_upper_bound (format, FALSE, args1) < 1024)
vsprintf (buffer, format, args2);
else
{
/* since we might be out of memory, we can't use g_vsnprintf(). */
#ifdef HAVE_VSNPRINTF
vsnprintf (buffer, 1024, format, args2);
#else /* !HAVE_VSNPRINTF */
/* we are out of luck here */
strncpy (buffer, format, 1024);
#endif /* !HAVE_VSNPRINTF */
buffer[1024] = 0;
}
va_end (args2);
for (i = g_bit_nth_msf (log_level, -1); i >= 0; i = g_bit_nth_msf (log_level, i))
{
register GLogLevelFlags test_level;
test_level = 1 << i;
if (log_level & test_level)
{
guint depth = GPOINTER_TO_UINT (g_private_get (g_log_depth));
GLogDomain *domain;
GLogFunc log_func;
gpointer data = NULL;
domain = g_log_find_domain (log_domain ? log_domain : "");
if (depth)
test_level |= G_LOG_FLAG_RECURSION;
depth++;
g_private_set (g_log_depth, GUINT_TO_POINTER (depth));
g_mutex_lock (g_messages_lock);
if ((((domain ? domain->fatal_mask : G_LOG_FATAL_MASK) |
g_log_always_fatal) & test_level) != 0)
test_level |= G_LOG_FLAG_FATAL;
g_mutex_unlock (g_messages_lock);
log_func = g_log_domain_get_handler (domain, test_level, &data);
log_func (log_domain, test_level, buffer, data);
/* *domain can be cluttered now */
if (test_level & G_LOG_FLAG_FATAL)
{
#if defined (G_ENABLE_DEBUG) && defined (SIGTRAP)
if (!(test_level & G_LOG_FLAG_RECURSION))
raise (SIGTRAP);
else
abort ();
#else /* !G_ENABLE_DEBUG || !SIGTRAP */
#ifdef G_OS_WIN32
MessageBox (NULL, fatal_msg_buf, NULL, MB_OK);
#endif
# if defined (_MSC_VER) && defined (_DEBUG)
/* let's see the call stack ... */
__asm int 3
# endif
abort ();
#endif /* !G_ENABLE_DEBUG || !SIGTRAP */
}
depth--;
g_private_set (g_log_depth, GUINT_TO_POINTER (depth));
}
}
}
void
g_log (const gchar *log_domain,
GLogLevelFlags log_level,
const gchar *format,
...)
{
va_list args;
va_start (args, format);
g_logv (log_domain, log_level, format, args);
va_end (args);
}
void
g_log_default_handler (const gchar *log_domain,
GLogLevelFlags log_level,
const gchar *message,
gpointer unused_data)
{
#ifdef G_OS_WIN32
FILE *fd;
#else
gint fd;
#endif
gboolean in_recursion;
gboolean is_fatal;
GErrorFunc local_glib_error_func;
GWarningFunc local_glib_warning_func;
GPrintFunc local_glib_message_func;
in_recursion = (log_level & G_LOG_FLAG_RECURSION) != 0;
is_fatal = (log_level & G_LOG_FLAG_FATAL) != 0;
log_level &= G_LOG_LEVEL_MASK;
if (!message)
message = "g_log_default_handler(): (NULL) message";
#ifdef G_OS_WIN32
/* Use just stdout as stderr is hard to get redirected from the
* DOS prompt.
*/
fd = stdout;
gonna_abort = is_fatal;
#else
fd = (log_level > G_LOG_LEVEL_MESSAGE) ? 1 : 2;
#endif
g_mutex_lock (g_messages_lock);
local_glib_error_func = glib_error_func;
local_glib_warning_func = glib_warning_func;
local_glib_message_func = glib_message_func;
g_mutex_unlock (g_messages_lock);
switch (log_level)
{
case G_LOG_LEVEL_ERROR:
if (!log_domain && local_glib_error_func)
{
/* compatibility code */
local_glib_error_func (message);
return;
}
/* use write(2) for output, in case we are out of memeory */
ensure_stdout_valid ();
write (fd, "\n", 1);
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
write (fd, "-", 1);
}
else
write (fd, "** ", 3);
if (in_recursion)
write (fd, "ERROR (recursed) **: ", 21);
else
write (fd, "ERROR **: ", 10);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
case G_LOG_LEVEL_CRITICAL:
ensure_stdout_valid ();
write (fd, "\n", 1);
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
write (fd, "-", 1);
}
else
write (fd, "** ", 3);
if (in_recursion)
write (fd, "CRITICAL (recursed) **: ", 24);
else
write (fd, "CRITICAL **: ", 13);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
case G_LOG_LEVEL_WARNING:
if (!log_domain && local_glib_warning_func)
{
/* compatibility code */
local_glib_warning_func (message);
return;
}
ensure_stdout_valid ();
write (fd, "\n", 1);
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
write (fd, "-", 1);
}
else
write (fd, "** ", 3);
if (in_recursion)
write (fd, "WARNING (recursed) **: ", 23);
else
write (fd, "WARNING **: ", 12);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
case G_LOG_LEVEL_MESSAGE:
if (!log_domain && local_glib_message_func)
{
/* compatibility code */
local_glib_message_func (message);
return;
}
ensure_stdout_valid ();
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
write (fd, "-", 1);
}
if (in_recursion)
write (fd, "Message (recursed): ", 20);
else
write (fd, "Message: ", 9);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
case G_LOG_LEVEL_INFO:
ensure_stdout_valid ();
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
write (fd, "-", 1);
}
if (in_recursion)
write (fd, "INFO (recursed): ", 17);
else
write (fd, "INFO: ", 6);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
case G_LOG_LEVEL_DEBUG:
ensure_stdout_valid ();
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
write (fd, "-", 1);
}
if (in_recursion)
write (fd, "DEBUG (recursed): ", 18);
else
write (fd, "DEBUG: ", 7);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
default:
/* we are used for a log level that is not defined by GLib itself,
* try to make the best out of it.
*/
ensure_stdout_valid ();
g_log_write_prefix (fd, log_level);
if (log_domain)
{
write (fd, log_domain, strlen (log_domain));
if (in_recursion)
write (fd, "-LOG (recursed:", 15);
else
write (fd, "-LOG (", 6);
}
else if (in_recursion)
write (fd, "LOG (recursed:", 14);
else
write (fd, "LOG (", 5);
if (log_level)
{
gchar string[] = "0x00): ";
gchar *p = string + 2;
guint i;
i = g_bit_nth_msf (log_level, -1);
*p = i >> 4;
p++;
*p = '0' + (i & 0xf);
if (*p > '9')
*p += 'A' - '9' - 1;
write (fd, string, 7);
}
else
write (fd, "): ", 3);
write (fd, message, strlen (message));
if (is_fatal)
write (fd, "\naborting...\n", 13);
else
write (fd, "\n", 1);
break;
}
}
GPrintFunc
g_set_print_handler (GPrintFunc func)
{
GPrintFunc old_print_func;
g_mutex_lock (g_messages_lock);
old_print_func = glib_print_func;
glib_print_func = func;
g_mutex_unlock (g_messages_lock);
return old_print_func;
}
void
g_print (const gchar *format,
...)
{
va_list args;
gchar *string;
GPrintFunc local_glib_print_func;
g_return_if_fail (format != NULL);
va_start (args, format);
string = g_strdup_vprintf (format, args);
va_end (args);
g_mutex_lock (g_messages_lock);
local_glib_print_func = glib_print_func;
g_mutex_unlock (g_messages_lock);
if (local_glib_print_func)
local_glib_print_func (string);
else
{
ensure_stdout_valid ();
fputs (string, stdout);
fflush (stdout);
}
g_free (string);
}
GPrintFunc
g_set_printerr_handler (GPrintFunc func)
{
GPrintFunc old_printerr_func;
g_mutex_lock (g_messages_lock);
old_printerr_func = glib_printerr_func;
glib_printerr_func = func;
g_mutex_unlock (g_messages_lock);
return old_printerr_func;
}
void
g_printerr (const gchar *format,
...)
{
va_list args;
gchar *string;
GPrintFunc local_glib_printerr_func;
g_return_if_fail (format != NULL);
va_start (args, format);
string = g_strdup_vprintf (format, args);
va_end (args);
g_mutex_lock (g_messages_lock);
local_glib_printerr_func = glib_printerr_func;
g_mutex_unlock (g_messages_lock);
if (local_glib_printerr_func)
local_glib_printerr_func (string);
else
{
fputs (string, stderr);
fflush (stderr);
}
g_free (string);
}
/* compatibility code */
GErrorFunc
g_set_error_handler (GErrorFunc func)
{
GErrorFunc old_error_func;
g_mutex_lock (g_messages_lock);
old_error_func = glib_error_func;
glib_error_func = func;
g_mutex_unlock (g_messages_lock);
return old_error_func;
}
/* compatibility code */
GWarningFunc
g_set_warning_handler (GWarningFunc func)
{
GWarningFunc old_warning_func;
g_mutex_lock (g_messages_lock);
old_warning_func = glib_warning_func;
glib_warning_func = func;
g_mutex_unlock (g_messages_lock);
return old_warning_func;
}
/* compatibility code */
GPrintFunc
g_set_message_handler (GPrintFunc func)
{
GPrintFunc old_message_func;
g_mutex_lock (g_messages_lock);
old_message_func = glib_message_func;
glib_message_func = func;
g_mutex_unlock (g_messages_lock);
return old_message_func;
}
#ifndef MB_LEN_MAX
# define MB_LEN_MAX 8
#endif
typedef struct
{
guint min_width;
guint precision;
gboolean alternate_format, zero_padding, adjust_left, locale_grouping;
gboolean add_space, add_sign, possible_sign, seen_precision;
gboolean mod_half, mod_long, mod_extra_long;
} PrintfArgSpec;
static inline guint
printf_string_upper_bound (const gchar *format,
gboolean may_warn,
va_list args)
{
static const gboolean honour_longs = SIZEOF_LONG > 4 || SIZEOF_VOID_P > 4;
guint len = 1;
if (!format)
return len;
while (*format)
{
register gchar c = *format++;
if (c != '%')
len += 1;
else /* (c == '%') */
{
PrintfArgSpec spec = { 0, };
gboolean seen_l = FALSE, conv_done = FALSE;
guint conv_len = 0;
const gchar *spec_start = format;
do
{
c = *format++;
switch (c)
{
GDoubleIEEE754 u_double;
guint v_uint;
gint v_int;
const gchar *v_string;
/* beware of positional parameters
*/
case '$':
if (may_warn)
g_warning (G_GNUC_PRETTY_FUNCTION
"(): unable to handle positional parameters (%%n$)");
len += 1024; /* try adding some safety padding */
break;
/* parse flags
*/
case '#':
spec.alternate_format = TRUE;
break;
case '0':
spec.zero_padding = TRUE;
break;
case '-':
spec.adjust_left = TRUE;
break;
case ' ':
spec.add_space = TRUE;
break;
case '+':
spec.add_sign = TRUE;
break;
case '\'':
spec.locale_grouping = TRUE;
break;
/* parse output size specifications
*/
case '.':
spec.seen_precision = TRUE;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
v_uint = c - '0';
c = *format;
while (c >= '0' && c <= '9')
{
format++;
v_uint = v_uint * 10 + c - '0';
c = *format;
}
if (spec.seen_precision)
spec.precision = MAX (spec.precision, v_uint);
else
spec.min_width = MAX (spec.min_width, v_uint);
break;
case '*':
v_int = va_arg (args, int);
if (spec.seen_precision)
{
/* forget about negative precision */
if (v_int >= 0)
spec.precision = MAX (spec.precision, v_int);
}
else
{
if (v_int < 0)
{
v_int = - v_int;
spec.adjust_left = TRUE;
}
spec.min_width = MAX (spec.min_width, v_int);
}
break;
/* parse type modifiers
*/
case 'h':
spec.mod_half = TRUE;
break;
case 'l':
if (!seen_l)
{
spec.mod_long = TRUE;
seen_l = TRUE;
break;
}
/* else, fall through */
case 'L':
case 'q':
spec.mod_long = TRUE;
spec.mod_extra_long = TRUE;
break;
case 'z':
case 'Z':
#if GLIB_SIZEOF_SIZE_T > 4
spec.mod_long = TRUE;
spec.mod_extra_long = TRUE;
#endif /* GLIB_SIZEOF_SIZE_T > 4 */
break;
case 't':
#if GLIB_SIZEOF_PTRDIFF_T > 4
spec.mod_long = TRUE;
spec.mod_extra_long = TRUE;
#endif /* GLIB_SIZEOF_PTRDIFF_T > 4 */
break;
case 'j':
#if GLIB_SIZEOF_INTMAX_T > 4
spec.mod_long = TRUE;
spec.mod_extra_long = TRUE;
#endif /* GLIB_SIZEOF_INTMAX_T > 4 */
break;
/* parse output conversions
*/
case '%':
conv_len += 1;
break;
case 'O':
case 'D':
case 'I':
case 'U':
/* some C libraries feature long variants for these as well? */
spec.mod_long = TRUE;
/* fall through */
case 'o':
conv_len += 2;
/* fall through */
case 'd':
case 'i':
conv_len += 1; /* sign */
/* fall through */
case 'u':
conv_len += 4;
/* fall through */
case 'x':
case 'X':
spec.possible_sign = TRUE;
conv_len += 10;
if (spec.mod_long && honour_longs)
conv_len *= 2;
if (spec.mod_extra_long)
conv_len *= 2;
if (spec.mod_extra_long)
{
#ifdef G_HAVE_GINT64
(void) va_arg (args, gint64);
#else /* !G_HAVE_GINT64 */
(void) va_arg (args, long);
#endif /* !G_HAVE_GINT64 */
}
else if (spec.mod_long)
(void) va_arg (args, long);
else
(void) va_arg (args, int);
break;
case 'A':
case 'a':
/* 0x */
conv_len += 2;
/* fall through */
case 'g':
case 'G':
case 'e':
case 'E':
case 'f':
spec.possible_sign = TRUE;
/* n . dddddddddddddddddddddddd E +- eeee */
conv_len += 1 + 1 + MAX (24, spec.precision) + 1 + 1 + 4;
if (may_warn && spec.mod_extra_long)
g_warning (G_GNUC_PRETTY_FUNCTION
"(): unable to handle long double, collecting double only");
#ifdef HAVE_LONG_DOUBLE
#error need to implement special handling for long double
#endif
u_double.v_double = va_arg (args, double);
/* %f can expand up to all significant digits before '.' (308) */
if (c == 'f' &&
u_double.mpn.biased_exponent > 0 && u_double.mpn.biased_exponent < 2047)
{
gint exp = u_double.mpn.biased_exponent;
exp -= G_IEEE754_DOUBLE_BIAS;
exp = exp * G_LOG_2_BASE_10 + 1;
conv_len += exp;
}
/* some printf() implementations require extra padding for rounding */
conv_len += 2;
/* we can't really handle locale specific grouping here */
if (spec.locale_grouping)
conv_len *= 2;
break;
case 'C':
spec.mod_long = TRUE;
/* fall through */
case 'c':
conv_len += spec.mod_long ? MB_LEN_MAX : 1;
(void) va_arg (args, int);
break;
case 'S':
spec.mod_long = TRUE;
/* fall through */
case 's':
v_string = va_arg (args, char*);
if (!v_string)
conv_len += 8; /* hold "(null)" */
else if (spec.seen_precision)
conv_len += spec.precision;
else
conv_len += strlen (v_string);
conv_done = TRUE;
if (spec.mod_long)
{
if (may_warn)
g_warning (G_GNUC_PRETTY_FUNCTION
"(): unable to handle wide char strings");
len += 1024; /* try adding some safety padding */
}
break;
case 'P': /* do we actually need this? */
/* fall through */
case 'p':
spec.alternate_format = TRUE;
conv_len += 10;
if (honour_longs)
conv_len *= 2;
/* fall through */
case 'n':
conv_done = TRUE;
(void) va_arg (args, void*);
break;
case 'm':
/* there's not much we can do to be clever */
v_string = g_strerror (errno);
v_uint = v_string ? strlen (v_string) : 0;
conv_len += MAX (256, v_uint);
break;
/* handle invalid cases
*/
case '\000':
/* no conversion specification, bad bad */
conv_len += format - spec_start;
break;
default:
if (may_warn)
g_warning (G_GNUC_PRETTY_FUNCTION
"(): unable to handle `%c' while parsing format",
c);
break;
}
conv_done |= conv_len > 0;
}
while (!conv_done);
/* handle width specifications */
conv_len = MAX (conv_len, MAX (spec.precision, spec.min_width));
/* handle flags */
conv_len += spec.alternate_format ? 2 : 0;
conv_len += (spec.add_space || spec.add_sign || spec.possible_sign);
/* finally done */
len += conv_len;
} /* else (c == '%') */
} /* while (*format) */
return len;
}
guint
g_printf_string_upper_bound (const gchar *format,
va_list args)
{
return printf_string_upper_bound (format, TRUE, args);
}
void
g_messages_init (void)
{
g_messages_lock = g_mutex_new();
g_log_depth = g_private_new(NULL);
}
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