contrib/texinfo-4/lib/system.h

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