gnu/usr.bin/grep/system.h

   1 /* Portability cruft.  Include after config.h and sys/types.h.
   2    Copyright (C) 1996, 1998, 1999 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 2, 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., 59 Temple Place - Suite 330, Boston, MA
  17    02111-1307, USA.  */
  18
  19 #undef PARAMS
  20 #if defined (__STDC__) && __STDC__
  21 # ifndef _PTR_T
  22 # define _PTR_T
  23   typedef void * ptr_t;
  24 # endif
  25 # define PARAMS(x) x
  26 #else
  27 # ifndef _PTR_T
  28 # define _PTR_T
  29   typedef char * ptr_t;
  30 # endif
  31 # define PARAMS(x) ()
  32 #endif
  33
  34 #ifdef HAVE_UNISTD_H
  35 # include <fcntl.h>
  36 # include <unistd.h>
  37 #else
  38 # define O_RDONLY 0
  39 # define SEEK_SET 0
  40 # define SEEK_CUR 1
  41 int open(), read(), close();
  42 #endif
  43
  44 #include <errno.h>
  45 #ifndef errno
  46 extern int errno;
  47 #endif
  48
  49 #ifndef HAVE_STRERROR
  50 extern int sys_nerr;
  51 extern char *sys_errlist[];
  52 # define strerror(E) (0 <= (E) && (E) < sys_nerr ? _(sys_errlist[E]) : _("Unknown system error"))
  53 #endif
  54
  55 /* Some operating systems treat text and binary files differently.  */
  56 #if O_BINARY
  57 # include <io.h>
  58 # ifdef HAVE_SETMODE
  59 #  define SET_BINARY(fd)  setmode (fd, O_BINARY)
  60 # else
  61 #  define SET_BINARY(fd)  _setmode (fd, O_BINARY)
  62 # endif
  63 #else
  64 # ifndef O_BINARY
  65 #  define O_BINARY 0
  66 #  define SET_BINARY(fd)   (void)0
  67 # endif
  68 #endif
  69
  70 #ifdef HAVE_DOS_FILE_NAMES
  71 # define IS_SLASH(c) ((c) == '/' || (c) == '\\')
  72 # define FILESYSTEM_PREFIX_LEN(f) ((f)[0] && (f)[1] == ':' ? 2 : 0)
  73 #endif
  74
  75 #ifndef IS_SLASH
  76 # define IS_SLASH(c) ((c) == '/')
  77 #endif
  78
  79 #ifndef FILESYSTEM_PREFIX_LEN
  80 # define FILESYSTEM_PREFIX_LEN(f) 0
  81 #endif
  82
  83 /* This assumes _WIN32, like DJGPP, has D_OK.  Does it?  In what header?  */
  84 #ifdef D_OK
  85 # ifdef EISDIR
  86 #  define is_EISDIR(e, f) \
  87      ((e) == EISDIR \
  88       || ((e) == EACCES && access (f, D_OK) == 0 && ((e) = EISDIR, 1)))
  89 # else
  90 #  define is_EISDIR(e, f) ((e) == EACCES && access (f, D_OK) == 0)
  91 # endif
  92 #endif
  93
  94 #ifndef is_EISDIR
  95 # ifdef EISDIR
  96 #  define is_EISDIR(e, f) ((e) == EISDIR)
  97 # else
  98 #  define is_EISDIR(e, f) 0
  99 # endif
 100 #endif
 101
 102 #if STAT_MACROS_BROKEN
 103 # undef S_ISDIR
 104 # undef S_ISREG
 105 #endif
 106 #if !defined(S_ISDIR) && defined(S_IFDIR)
 107 # define S_ISDIR(Mode) (((Mode) & S_IFMT) == S_IFDIR)
 108 #endif
 109 #if !defined(S_ISREG) && defined(S_IFREG)
 110 # define S_ISREG(Mode) (((Mode) & S_IFMT) == S_IFREG)
 111 #endif
 112
 113 #ifdef STDC_HEADERS
 114 # include <stdlib.h>
 115 #else
 116 char *getenv ();
 117 ptr_t malloc(), realloc(), calloc();
 118 void free();
 119 #endif
 120
 121 #if __STDC__
 122 # include <stddef.h>
 123 #endif
 124 #ifdef STDC_HEADERS
 125 # include <limits.h>
 126 #endif
 127 #ifndef CHAR_BIT
 128 # define CHAR_BIT 8
 129 #endif
 130 /* The extra casts work around common compiler bugs.  */
 131 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 132 #define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
 133                               ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) \
 134                               : (t) 0))
 135 #define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
 136 #ifndef CHAR_MAX
 137 # define CHAR_MAX TYPE_MAXIMUM (char)
 138 #endif
 139 #ifndef INT_MAX
 140 # define INT_MAX TYPE_MAXIMUM (int)
 141 #endif
 142 #ifndef UCHAR_MAX
 143 # define UCHAR_MAX TYPE_MAXIMUM (unsigned char)
 144 #endif
 145
 146 #if !defined(STDC_HEADERS) && defined(HAVE_STRING_H) && defined(HAVE_MEMORY_H)
 147 # include <memory.h>
 148 #endif
 149 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
 150 # include <string.h>
 151 #else
 152 # include <strings.h>
 153 # undef strchr
 154 # define strchr index
 155 # undef strrchr
 156 # define strrchr rindex
 157 # undef memcpy
 158 # define memcpy(d, s, n) bcopy (s, d, n)
 159 #endif
 160 #ifndef HAVE_MEMCHR
 161 ptr_t memchr();
 162 #endif
 163 #if ! defined HAVE_MEMMOVE && ! defined memmove
 164 # define memmove(d, s, n) bcopy (s, d, n)
 165 #endif
 166
 167 #include <ctype.h>
 168
 169 #ifndef isgraph
 170 # define isgraph(C) (isprint(C) && !isspace(C))
 171 #endif
 172
 173 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
 174 # define IN_CTYPE_DOMAIN(c) 1
 175 #else
 176 # define IN_CTYPE_DOMAIN(c) isascii(c)
 177 #endif
 178
 179 #define ISALPHA(C)      (IN_CTYPE_DOMAIN (C) && isalpha (C))
 180 #define ISUPPER(C)      (IN_CTYPE_DOMAIN (C) && isupper (C))
 181 #define ISLOWER(C)      (IN_CTYPE_DOMAIN (C) && islower (C))
 182 #define ISDIGIT(C)      (IN_CTYPE_DOMAIN (C) && isdigit (C))
 183 #define ISXDIGIT(C)     (IN_CTYPE_DOMAIN (C) && isxdigit (C))
 184 #define ISSPACE(C)      (IN_CTYPE_DOMAIN (C) && isspace (C))
 185 #define ISPUNCT(C)      (IN_CTYPE_DOMAIN (C) && ispunct (C))
 186 #define ISALNUM(C)      (IN_CTYPE_DOMAIN (C) && isalnum (C))
 187 #define ISPRINT(C)      (IN_CTYPE_DOMAIN (C) && isprint (C))
 188 #define ISGRAPH(C)      (IN_CTYPE_DOMAIN (C) && isgraph (C))
 189 #define ISCNTRL(C)      (IN_CTYPE_DOMAIN (C) && iscntrl (C))
 190
 191 #define TOLOWER(C) (ISUPPER(C) ? tolower(C) : (C))
 192
 193 #if ENABLE_NLS
 194 # include <libintl.h>
 195 # define _(String) gettext (String)
 196 #else
 197 # define _(String) String
 198 #endif
 199 #define N_(String) String
 200
 201 #if HAVE_SETLOCALE
 202 # include <locale.h>
 203 #endif
 204
 205 #ifndef initialize_main
 206 #define initialize_main(argcp, argvp)
 207 #endif