292 lines
8.1 KiB
C
292 lines
8.1 KiB
C
/* system.h: system-dependent declarations; include this first.
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$Id: system.h,v 1.12 2004/04/26 13:56:57 karl Exp $
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
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Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef TEXINFO_SYSTEM_H
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#define TEXINFO_SYSTEM_H
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#define _GNU_SOURCE
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#include <config.h>
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#ifdef MIKTEX
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#include <gnu-miktex.h>
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#define S_ISDIR(x) ((x)&_S_IFDIR)
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#else
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/* MiKTeX defines substring() in a separate DLL, where it has its
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own __declspec declaration. We don't want to try to duplicate
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this Microsoft-ism here. */
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extern char *substring (const char *, const char *);
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#endif
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/* We follow the order of header inclusion from Autoconf's
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ac_includes_default, more or less. */
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#include <stdio.h>
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#include <sys/types.h>
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#include <ctype.h>
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/* All systems nowadays probably have these functions, but ... */
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#ifndef HAVE_SETLOCALE
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#define setlocale(category,locale) /* empty */
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#endif
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/* For gettext (NLS). */
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#define const
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#include "gettext.h"
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#undef const
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#define _(String) gettext (String)
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#define N_(String) (String)
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#ifdef STDC_HEADERS
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#define getopt system_getopt
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#include <stdlib.h>
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#undef getopt
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#else
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extern char *getenv ();
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#endif
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/* Don't use bcopy! Use memmove if source and destination may overlap,
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memcpy otherwise. */
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#if HAVE_STRING_H
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# if !STDC_HEADERS && HAVE_MEMORY_H
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# include <memory.h>
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# endif
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# include <string.h>
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#endif
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#if HAVE_STRINGS_H
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/* Always include <strings.h> if we have it. This is because that's
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what Autoconf's AC_CHECK_DECL does. On IBM AIX 4.2, strncasecmp is
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only declared in strings.h. */
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# include <strings.h>
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#endif
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#if !HAVE_STRNCASECMP || !HAVE_STRCASECMP
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# include "strcase.h"
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#endif
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#if !HAVE_DECL_MEMCHR
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char *memchr ();
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#endif
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/* <unistd.h> defines _POSIX_VERSION, but Paul Eggert points out that is
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only supposed to be used in user code, not other system headers. */
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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#ifdef VMS
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#include <perror.h>
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#endif
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#ifndef HAVE_DECL_STRERROR
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extern char *strerror ();
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#endif
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifndef PATH_MAX
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#ifndef _POSIX_PATH_MAX
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# define _POSIX_PATH_MAX 255
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#endif
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#define PATH_MAX _POSIX_PATH_MAX
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#endif
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#ifndef HAVE_DECL_STRCASECMP
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extern int strcasecmp ();
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#endif
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#ifndef HAVE_DECL_STRNCASECMP
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extern int strncasecmp ();
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#endif
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#ifndef HAVE_DECL_STRCOLL
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extern int strcoll ();
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#endif
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#include <sys/stat.h>
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#if STAT_MACROS_BROKEN
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# undef S_ISDIR
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#endif
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#if !defined(S_ISDIR) && defined(S_IFDIR)
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# define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
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#endif
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif /* HAVE_SYS_FILE_H */
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#ifndef O_RDONLY
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/* Since <fcntl.h> is POSIX, prefer that to <sys/fcntl.h>.
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This also avoids some useless warnings on (at least) Linux. */
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#else /* not HAVE_FCNTL_H */
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#ifdef HAVE_SYS_FCNTL_H
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#include <sys/fcntl.h>
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#endif /* not HAVE_SYS_FCNTL_H */
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#endif /* not HAVE_FCNTL_H */
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#endif /* not O_RDONLY */
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/* MS-DOS and similar non-Posix systems have some peculiarities:
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- they distinguish between binary and text files;
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- they use both `/' and `\\' as directory separator in file names;
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- they can have a drive letter X: prepended to a file name;
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- they have a separate root directory on each drive;
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- their filesystems are case-insensitive;
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- directories in environment variables (like INFOPATH) are separated
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by `;' rather than `:';
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- text files can have their lines ended either with \n or with \r\n pairs;
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These are all parameterized here except the last, which is
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handled by the source code as appropriate (mostly, in info/). */
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#ifndef O_BINARY
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# ifdef _O_BINARY
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# define O_BINARY _O_BINARY
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# else
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# define O_BINARY 0
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# endif
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#endif /* O_BINARY */
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/* We'd like to take advantage of _doprnt if it's around, a la error.c,
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but then we'd have no VA_SPRINTF. */
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#if HAVE_VPRINTF
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# if __STDC__
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# include <stdarg.h>
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# define VA_START(args, lastarg) va_start(args, lastarg)
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# else
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# include <varargs.h>
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# define VA_START(args, lastarg) va_start(args)
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# endif
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# define VA_FPRINTF(file, fmt, ap) vfprintf (file, fmt, ap)
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# define VA_SPRINTF(str, fmt, ap) vsprintf (str, fmt, ap)
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#else /* not HAVE_VPRINTF */
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# define VA_START(args, lastarg)
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# define va_alist a1, a2, a3, a4, a5, a6, a7, a8
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# define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
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# define va_end(args)
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#endif
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#if O_BINARY
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# ifdef HAVE_IO_H
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# include <io.h>
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# endif
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# ifdef __MSDOS__
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# include <limits.h>
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# ifdef __DJGPP__
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# define HAVE_LONG_FILENAMES(dir) (pathconf (dir, _PC_NAME_MAX) > 12)
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# define NULL_DEVICE "/dev/null"
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# define DEFAULT_INFOPATH "c:/djgpp/info;/usr/local/info;/usr/info;."
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/* DJGPP supports /dev/null, which is okay for Unix aficionados,
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shell scripts and Makefiles, but interactive DOS die-hards
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would probably want to have NUL as well. */
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# define ALSO_NULL_DEVICE "NUL"
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# else /* O_BINARY && !__DJGPP__ */
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# define HAVE_LONG_FILENAMES(dir) (0)
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# define NULL_DEVICE "NUL"
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# endif /* O_BINARY && !__DJGPP__ */
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# define SET_SCREEN_SIZE_HELPER terminal_prep_terminal()
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# define DEFAULT_INFO_PRINT_COMMAND ">PRN"
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# else /* O_BINARY && !__MSDOS__ */
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# define setmode(f,m) _setmode(f,m)
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# define HAVE_LONG_FILENAMES(dir) (1)
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# define NULL_DEVICE "NUL"
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# endif /* O_BINARY && !__MSDOS__ */
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# ifdef __CYGWIN__
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# define DEFAULT_TMPDIR "/tmp/"
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# define PATH_SEP ":"
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# else /* O_BINARY && !__CYGWIN__ */
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# define DEFAULT_TMPDIR "c:/"
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# define PATH_SEP ";"
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# endif /* O_BINARY && !__CYGWIN__ */
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/* Back to any O_BINARY system. */
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# define FILENAME_CMP strcasecmp
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# define FILENAME_CMPN strncasecmp
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# define FOPEN_RBIN "rb"
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# define FOPEN_WBIN "wb"
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# define HAVE_DRIVE(n) ((n)[0] && (n)[1] == ':')
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# define IS_SLASH(c) ((c) == '/' || (c) == '\\')
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# define IS_ABSOLUTE(n) (IS_SLASH((n)[0]) || ((n)[0] && (n)[1] == ':'))
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# define PIPE_USE_FORK 0
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# define SET_BINARY(f) do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
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# define STRIP_DOT_EXE 1
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#else /* not O_BINARY, i.e., Unix */
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# define SET_BINARY(f) (void)0
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# define FOPEN_RBIN "r"
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# define FOPEN_WBIN "w"
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# define IS_SLASH(c) ((c) == '/')
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# define HAVE_DRIVE(n) (0)
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# define IS_ABSOLUTE(n) ((n)[0] == '/')
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# define FILENAME_CMP strcmp
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# define FILENAME_CMPN strncmp
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# define HAVE_LONG_FILENAMES(dir) (1)
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# define PATH_SEP ":"
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# define STRIP_DOT_EXE 0
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# ifdef VMS
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# define DEFAULT_TMPDIR "sys$scratch:"
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# else
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# define DEFAULT_TMPDIR "/tmp/"
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# endif
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# define NULL_DEVICE "/dev/null"
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# define PIPE_USE_FORK 1
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#endif /* not O_BINARY */
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/* Everything but DJGPP. */
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#ifndef ALSO_NULL_DEVICE
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# define ALSO_NULL_DEVICE ""
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#endif
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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/* Some systems don't declare this function in pwd.h. */
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struct passwd *getpwnam (const char *name);
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/* Our library routines not included in any system library. */
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extern void *xmalloc (size_t), *xrealloc (void *, size_t);
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extern char *xstrdup (const char *);
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extern void xexit (int);
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/* For convenience. */
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#define STREQ(s1,s2) (strcmp (s1, s2) == 0)
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#define STRCASEEQ(s1,s2) (strcasecmp (s1, s2) == 0)
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#define STRNCASEEQ(s1,s2,n) (strncasecmp (s1, s2, n) == 0)
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/* We don't need anything fancy. If we did need something fancy, gnulib
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has it. */
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#ifdef MIN
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#undef MIN
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#endif
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#ifdef MAX
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#undef MAX
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#endif
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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#endif /* TEXINFO_SYSTEM_H */
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