1 /* Portability cruft. Include after config.h and sys/types.h. 2 Copyright 1996, 1998-2000, 2007, 2009-2020 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 static _GL_UNUSED void 105 __asan_poison_memory_region (void const volatile *addr, size_t size) { } 106 static _GL_UNUSED 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 133