1  /* Portability cruft.  Include after config.h and sys/types.h.
       2     Copyright 1996, 1998-2000, 2007, 2009-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software; you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation; either version 3, or (at your option)
       7     any later version.
       8  
       9     This program 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
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program; if not, write to the Free Software
      16     Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
      17     02110-1301, USA.  */
      18  
      19  #ifndef GREP_SYSTEM_H
      20  #define GREP_SYSTEM_H 1
      21  
      22  #include <fcntl.h>
      23  #include <unistd.h>
      24  #include <errno.h>
      25  
      26  #include "configmake.h"
      27  #include "dirname.h"
      28  #include "ignore-value.h"
      29  #include "minmax.h"
      30  #include "same-inode.h"
      31  
      32  #include <stdlib.h>
      33  #include <stddef.h>
      34  #include <limits.h>
      35  #include <string.h>
      36  #include <ctype.h>
      37  
      38  enum { EXIT_TROUBLE = 2 };
      39  enum { NCHAR = UCHAR_MAX + 1 };
      40  
      41  #include <gettext.h>
      42  #define N_(String) gettext_noop(String)
      43  #define _(String) gettext(String)
      44  
      45  #include <locale.h>
      46  
      47  #ifndef initialize_main
      48  # define initialize_main(argcp, argvp)
      49  #endif
      50  
      51  #include "unlocked-io.h"
      52  
      53  _GL_INLINE_HEADER_BEGIN
      54  #ifndef SYSTEM_INLINE
      55  # define SYSTEM_INLINE _GL_INLINE
      56  #endif
      57  
      58  #define STREQ(a, b) (strcmp (a, b) == 0)
      59  
      60  /* Convert a possibly-signed character to an unsigned character.  This is
      61     a bit safer than casting to unsigned char, since it catches some type
      62     errors that the cast doesn't.  */
      63  SYSTEM_INLINE unsigned char
      64  to_uchar (char ch)
      65  {
      66    return ch;
      67  }
      68  
      69  _GL_INLINE_HEADER_END
      70  
      71  #ifndef __has_feature
      72  # define __has_feature(F) false
      73  #endif
      74  
      75  #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
      76  # define HAVE_ASAN 1
      77  #else
      78  # define HAVE_ASAN 0
      79  #endif
      80  
      81  #if HAVE_ASAN
      82  
      83  /* Mark memory region [addr, addr+size) as unaddressable.
      84     This memory must be previously allocated by the user program.  Accessing
      85     addresses in this region from instrumented code is forbidden until
      86     this region is unpoisoned.  This function is not guaranteed to poison
      87     the whole region - it may poison only a subregion of [addr, addr+size)
      88     due to ASan alignment restrictions.
      89     Method is NOT thread-safe in the sense that no two threads can
      90     (un)poison memory in the same memory region simultaneously.  */
      91  void __asan_poison_memory_region (void const volatile *addr, size_t size);
      92  
      93  /* Mark memory region [addr, addr+size) as addressable.
      94     This memory must be previously allocated by the user program.  Accessing
      95     addresses in this region is allowed until this region is poisoned again.
      96     This function may unpoison a superregion of [addr, addr+size) due to
      97     ASan alignment restrictions.
      98     Method is NOT thread-safe in the sense that no two threads can
      99     (un)poison memory in the same memory region simultaneously.  */
     100  void __asan_unpoison_memory_region (void const volatile *addr, size_t size);
     101  
     102  #else
     103  
     104  _GL_UNUSED static void
     105  __asan_poison_memory_region (void const volatile *addr, size_t size) { }
     106  _GL_UNUSED static void
     107  __asan_unpoison_memory_region (void const volatile *addr, size_t size) { }
     108  #endif
     109  
     110  #ifndef FALLTHROUGH
     111  # if __GNUC__ < 7
     112  #  define FALLTHROUGH ((void) 0)
     113  # else
     114  #  define FALLTHROUGH __attribute__ ((__fallthrough__))
     115  # endif
     116  #endif
     117  
     118  /* When we deliberately use duplicate branches, use this macro to
     119     disable gcc's -Wduplicated-branches in the containing expression.  */
     120  #if 7 <= __GNUC__
     121  # define IGNORE_DUPLICATE_BRANCH_WARNING(exp)				\
     122    ({									\
     123      _Pragma ("GCC diagnostic push")					\
     124      _Pragma ("GCC diagnostic ignored \"-Wduplicated-branches\"")	\
     125      exp;								\
     126      _Pragma ("GCC diagnostic pop")					\
     127    })
     128  #else
     129  # define IGNORE_DUPLICATE_BRANCH_WARNING(exp) exp
     130  #endif
     131  
     132  #endif