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.  */
35extern 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
65extern 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
89char *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
100extern int errno;
101#endif
102#ifdef VMS
103#include <perror.h>
104#endif
105
106#ifndef HAVE_DECL_STRERROR
107extern 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
121extern int strcasecmp ();
122#endif
123
124#ifndef HAVE_DECL_STRNCASECMP
125extern int strncasecmp ();
126#endif
127
128#ifndef HAVE_DECL_STRCOLL
129extern 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. */
268struct passwd *getpwnam (const char *name);
269
270/* Our library routines not included in any system library.  */
271extern void *xmalloc (size_t), *xrealloc (void *, size_t);
272extern char *xstrdup (const char *);
273extern 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 */
292