gnu/dist/texinfo/lib/system.h

   1 /*      $NetBSD: system.h,v 1.10 2008/09/09 06:32:59 lukem Exp $        */
   2
   3 /* system.h: system-dependent declarations; include this first.
   4    Id: system.h,v 1.12 2004/04/26 13:56:57 karl Exp
   5
   6    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
   7    Foundation, Inc.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2, or (at your option)
  12    any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software Foundation,
  21    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef TEXINFO_SYSTEM_H
  24 #define TEXINFO_SYSTEM_H
  25
  26 #define _GNU_SOURCE
  27
  28 #include <config.h>
  29
  30 #ifdef MIKTEX
  31 #include <gnu-miktex.h>
  32 #define S_ISDIR(x) ((x)&_S_IFDIR)
  33 #else
  34 /* MiKTeX defines substring() in a separate DLL, where it has its
  35    own __declspec declaration.  We don't want to try to duplicate
  36    this Microsoft-ism here.  */
  37 extern char *substring (const char *, const char *);
  38 #endif
  39
  40 /* We follow the order of header inclusion from Autoconf's
  41    ac_includes_default, more or less.  */
  42 #include <stdio.h>
  43 #include <sys/types.h>
  44 #include <ctype.h>
  45
  46 /* All systems nowadays probably have these functions, but ... */
  47 #ifdef HAVE_LOCALE_H
  48 #include <locale.h>
  49 #endif
  50 #ifndef HAVE_SETLOCALE
  51 #define setlocale(category,locale) /* empty */
  52 #endif
  53
  54 /* For gettext (NLS).  */
  55 #define const
  56 #include "gettext.h"
  57 #undef const
  58
  59 #define _(String) gettext (String)
  60 #define N_(String) (String)
  61
  62 #ifdef STDC_HEADERS
  63 #define getopt system_getopt
  64 #include <stdlib.h>
  65 #undef getopt
  66 #else
  67 extern char *getenv ();
  68 #endif
  69
  70 /* Don't use bcopy!  Use memmove if source and destination may overlap,
  71    memcpy otherwise.  */
  72 #if HAVE_STRING_H
  73 # if !STDC_HEADERS && HAVE_MEMORY_H
  74 #  include <memory.h>
  75 # endif
  76 # include <string.h>
  77 #endif
  78
  79 #if HAVE_STRINGS_H
  80 /* Always include <strings.h> if we have it.  This is because that's
  81    what Autoconf's AC_CHECK_DECL does.  On IBM AIX 4.2, strncasecmp is
  82    only declared in strings.h.  */
  83 # include <strings.h>
  84 #endif
  85
  86 #if !HAVE_STRNCASECMP || !HAVE_STRCASECMP
  87 # include "strcase.h"
  88 #endif
  89
  90 #if !HAVE_DECL_MEMCHR
  91 char *memchr ();
  92 #endif
  93
  94 /* <unistd.h> defines _POSIX_VERSION, but Paul Eggert points out that is
  95    only supposed to be used in user code, not other system headers.  */
  96 #ifdef HAVE_UNISTD_H
  97 #include <unistd.h>
  98 #endif /* HAVE_UNISTD_H */
  99
 100 #include <errno.h>
 101 #ifndef errno
 102 extern int errno;
 103 #endif
 104 #ifdef VMS
 105 #include <perror.h>
 106 #endif
 107
 108 #ifndef HAVE_DECL_STRERROR
 109 extern char *strerror ();
 110 #endif
 111
 112 #ifdef HAVE_LIMITS_H
 113 #include <limits.h>
 114 #endif
 115 #ifndef PATH_MAX
 116 #ifndef _POSIX_PATH_MAX
 117 # define _POSIX_PATH_MAX 255
 118 #endif
 119 #define PATH_MAX _POSIX_PATH_MAX
 120 #endif
 121
 122 #ifndef HAVE_DECL_STRCASECMP
 123 extern int strcasecmp ();
 124 #endif
 125
 126 #ifndef HAVE_DECL_STRNCASECMP
 127 extern int strncasecmp ();
 128 #endif
 129
 130 #ifndef HAVE_DECL_STRCOLL
 131 extern int strcoll ();
 132 #endif
 133
 134 #include <sys/stat.h>
 135 #if STAT_MACROS_BROKEN
 136 # undef S_ISDIR
 137 #endif
 138 #if !defined(S_ISDIR) && defined(S_IFDIR)
 139 # define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 140 #endif
 141
 142 #ifdef HAVE_SYS_FILE_H
 143 #include <sys/file.h>
 144 #endif /* HAVE_SYS_FILE_H */
 145
 146 #ifndef O_RDONLY
 147 /* Since <fcntl.h> is POSIX, prefer that to <sys/fcntl.h>.
 148    This also avoids some useless warnings on (at least) Linux.  */
 149 #ifdef HAVE_FCNTL_H
 150 #include <fcntl.h>
 151 #else /* not HAVE_FCNTL_H */
 152 #ifdef HAVE_SYS_FCNTL_H
 153 #include <sys/fcntl.h>
 154 #endif /* not HAVE_SYS_FCNTL_H */
 155 #endif /* not HAVE_FCNTL_H */
 156 #endif /* not O_RDONLY */
 157
 158 /* MS-DOS and similar non-Posix systems have some peculiarities:
 159     - they distinguish between binary and text files;
 160     - they use both `/' and `\\' as directory separator in file names;
 161     - they can have a drive letter X: prepended to a file name;
 162     - they have a separate root directory on each drive;
 163     - their filesystems are case-insensitive;
 164     - directories in environment variables (like INFOPATH) are separated
 165         by `;' rather than `:';
 166     - text files can have their lines ended either with \n or with \r\n pairs;
 167    These are all parameterized here except the last, which is
 168    handled by the source code as appropriate (mostly, in info/).  */
 169 #ifndef O_BINARY
 170 # ifdef _O_BINARY
 171 #  define O_BINARY _O_BINARY
 172 # else
 173 #  define O_BINARY 0
 174 # endif
 175 #endif /* O_BINARY */
 176
 177 /* We'd like to take advantage of _doprnt if it's around, a la error.c,
 178    but then we'd have no VA_SPRINTF.  */
 179 #if HAVE_VPRINTF
 180 # if __STDC__
 181 #  include <stdarg.h>
 182 #  define VA_START(args, lastarg) va_start(args, lastarg)
 183 # else
 184 #  include <varargs.h>
 185 #  define VA_START(args, lastarg) va_start(args)
 186 # endif
 187 # define VA_FPRINTF(file, fmt, ap) vfprintf (file, fmt, ap)
 188 # define VA_SPRINTF(str, fmt, ap) vsprintf (str, fmt, ap)
 189 #else /* not HAVE_VPRINTF */
 190 # define VA_START(args, lastarg)
 191 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
 192 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
 193 # define va_end(args)
 194 #endif
 195
 196 #if O_BINARY
 197 # ifdef HAVE_IO_H
 198 #  include <io.h>
 199 # endif
 200 # ifdef __MSDOS__
 201 #  include <limits.h>
 202 #  ifdef __DJGPP__
 203 #   define HAVE_LONG_FILENAMES(dir)  (pathconf (dir, _PC_NAME_MAX) > 12)
 204 #   define NULL_DEVICE  "/dev/null"
 205 #   define DEFAULT_INFOPATH "c:/djgpp/info;/usr/local/info;/usr/info;."
 206     /* DJGPP supports /dev/null, which is okay for Unix aficionados,
 207        shell scripts and Makefiles, but interactive DOS die-hards
 208        would probably want to have NUL as well.  */
 209 #   define ALSO_NULL_DEVICE  "NUL"
 210 #  else  /* O_BINARY && !__DJGPP__ */
 211 #   define HAVE_LONG_FILENAMES(dir)  (0)
 212 #   define NULL_DEVICE  "NUL"
 213 #  endif /* O_BINARY && !__DJGPP__ */
 214 #  define SET_SCREEN_SIZE_HELPER terminal_prep_terminal()
 215 #  define DEFAULT_INFO_PRINT_COMMAND ">PRN"
 216 # else   /* O_BINARY && !__MSDOS__ */
 217 #  define setmode(f,m)  _setmode(f,m)
 218 #  define HAVE_LONG_FILENAMES(dir)   (1)
 219 #  define NULL_DEVICE   "NUL"
 220 # endif  /* O_BINARY && !__MSDOS__ */
 221 # ifdef __CYGWIN__
 222 #  define DEFAULT_TMPDIR        "/tmp/"
 223 #  define PATH_SEP      ":"
 224 # else  /* O_BINARY && !__CYGWIN__ */
 225 #  define DEFAULT_TMPDIR        "c:/"
 226 #  define PATH_SEP      ";"
 227 # endif /* O_BINARY && !__CYGWIN__ */
 228   /* Back to any O_BINARY system.  */
 229 # define FILENAME_CMP   strcasecmp
 230 # define FILENAME_CMPN  strncasecmp
 231 # define FOPEN_RBIN     "rb"
 232 # define FOPEN_WBIN     "wb"
 233 # define HAVE_DRIVE(n)  ((n)[0] && (n)[1] == ':')
 234 # define IS_SLASH(c)    ((c) == '/' || (c) == '\\')
 235 # define IS_ABSOLUTE(n) (IS_SLASH((n)[0]) || ((n)[0] && (n)[1] == ':'))
 236 # define PIPE_USE_FORK  0
 237 # define SET_BINARY(f)  do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
 238 # define STRIP_DOT_EXE  1
 239
 240 #else  /* not O_BINARY, i.e., Unix */
 241 # define SET_BINARY(f)  (void)0
 242 # define FOPEN_RBIN     "r"
 243 # define FOPEN_WBIN     "w"
 244 # define IS_SLASH(c)    ((c) == '/')
 245 # define HAVE_DRIVE(n)  (0)
 246 # define IS_ABSOLUTE(n) ((n)[0] == '/')
 247 # define FILENAME_CMP   strcmp
 248 # define FILENAME_CMPN  strncmp
 249 # define HAVE_LONG_FILENAMES(dir)   (1)
 250 # define PATH_SEP       ":"
 251 # define STRIP_DOT_EXE  0
 252 # ifdef VMS
 253 #  define DEFAULT_TMPDIR "sys$scratch:"
 254 # else
 255 #  define DEFAULT_TMPDIR "/tmp/"
 256 # endif
 257 # define NULL_DEVICE    "/dev/null"
 258 # define PIPE_USE_FORK  1
 259 #endif /* not O_BINARY */
 260
 261 /* Everything but DJGPP.  */
 262 #ifndef ALSO_NULL_DEVICE
 263 # define ALSO_NULL_DEVICE  ""
 264 #endif
 265
 266 #ifdef HAVE_PWD_H
 267 #include <pwd.h>
 268 #endif
 269 /* Some systems don't declare this function in pwd.h. */
 270 struct passwd *getpwnam (const char *name);
 271
 272 #ifdef HAVE_STDINT_H
 273 #include <stdint.h>
 274 #endif
 275
 276 /* Our library routines not included in any system library.  */
 277 extern void *xmalloc (size_t), *xrealloc (void *, size_t);
 278 extern char *xstrdup (const char *);
 279 extern void xexit (int);
 280
 281 /* For convenience.  */
 282 #define STREQ(s1,s2) (strcmp (s1, s2) == 0)
 283 #define STRCASEEQ(s1,s2) (strcasecmp (s1, s2) == 0)
 284 #define STRNCASEEQ(s1,s2,n) (strncasecmp (s1, s2, n) == 0)
 285
 286 /* We don't need anything fancy.  If we did need something fancy, gnulib
 287    has it.  */
 288 #ifdef MIN
 289 #undef MIN
 290 #endif
 291 #define MIN(a,b) ((a) < (b) ? (a) : (b))
 292 #ifdef MAX
 293 #undef MAX
 294 #endif
 295 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 296
 297 #endif /* TEXINFO_SYSTEM_H */