misc/bits/error.h

   1 /* Specializations for error functions.
   2    Copyright (C) 2007 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _ERROR_H
  21 # error "Never include <bits/error.h> directly; use <error.h> instead."
  22 #endif
  23
  24
  25 extern void __REDIRECT (__error_alias, (int __status, int __errnum,
  26                                         __const char *__format, ...),
  27                         error)
  28   __attribute__ ((__format__ (__printf__, 3, 4)));
  29 extern void __REDIRECT (__error_noreturn, (int __status, int __errnum,
  30                                            __const char *__format, ...),
  31                         error)
  32   __attribute__ ((__noreturn__, __format__ (__printf__, 3, 4)));
  33
  34
  35 /* If we know the function will never return make sure the compiler
  36    realizes that, too.  */
  37 __extern_always_inline void
  38 error (int __status, int __errnum, __const char *__format, ...)
  39 {
  40   if (__builtin_constant_p (__status) && __status != 0)
  41     __error_noreturn (__status, __errnum, __format, __va_arg_pack ());
  42   else
  43     __error_alias (__status, __errnum, __format, __va_arg_pack ());
  44 }
  45
  46
  47 extern void __REDIRECT (__error_at_line_alias, (int __status, int __errnum,
  48                                                 __const char *__fname,
  49                                                 unsigned int __line,
  50                                                 __const char *__format, ...),
  51                         error_at_line)
  52   __attribute__ ((__format__ (__printf__, 5, 6)));
  53 extern void __REDIRECT (__error_at_line_noreturn, (int __status, int __errnum,
  54                                                    __const char *__fname,
  55                                                    unsigned int __line,
  56                                                    __const char *__format,
  57                                                    ...),
  58                         error_at_line)
  59   __attribute__ ((__noreturn__, __format__ (__printf__, 5, 6)));
  60
  61
  62 /* If we know the function will never return make sure the compiler
  63    realizes that, too.  */
  64 __extern_always_inline void
  65 error_at_line (int __status, int __errnum, __const char *__fname,
  66                unsigned int __line,__const char *__format, ...)
  67 {
  68   if (__builtin_constant_p (__status) && __status != 0)
  69     __error_at_line_noreturn (__status, __errnum, __fname, __line, __format,
  70                               __va_arg_pack ());
  71   else
  72     __error_at_line_alias (__status, __errnum, __fname, __line,
  73                            __format, __va_arg_pack ());
  74 }