178189Sbrian/* System dependent declarations.
2330449Seadler   Copyright (C) 1988, 1989, 1992, 1993, 1994 Free Software Foundation, Inc.
3330449Seadler
478189SbrianThis file is part of GNU DIFF.
578189Sbrian
678189SbrianGNU DIFF is free software; you can redistribute it and/or modify
778189Sbrianit under the terms of the GNU General Public License as published by
846686Sbrianthe Free Software Foundation; either version 2, or (at your option)
978189Sbrianany later version.
1078189Sbrian
1178189SbrianGNU DIFF is distributed in the hope that it will be useful,
1278189Sbrianbut WITHOUT ANY WARRANTY; without even the implied warranty of
1378189SbrianMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
1478189SbrianGNU General Public License for more details.
1578189Sbrian
1678189Sbrian*/
1746686Sbrian
1878189Sbrian/* We must define `volatile' and `const' first (the latter inside config.h),
1978189Sbrian   so that they're used consistently in all system includes.  */
2078189Sbrian#if !__STDC__
2178189Sbrian#ifndef volatile
2278189Sbrian#define volatile
2378189Sbrian#endif
2478189Sbrian#endif
2578189Sbrian#include <config.h>
2678189Sbrian
2778189Sbrian#include <sys/types.h>
2878189Sbrian#include <sys/stat.h>
2946686Sbrian
3050479Speter/* Note that PARAMS is just internal to the diff library; diffrun.h
3146686Sbrian   has its own mechanism, which will hopefully be less likely to
3246686Sbrian   conflict with the library's caller's namespace.  */
3346686Sbrian#if __STDC__
3446686Sbrian#define PARAMS(args) args
3546686Sbrian#define VOID void
3646686Sbrian#else
3746686Sbrian#define PARAMS(args) ()
3846686Sbrian#define VOID char
3946686Sbrian#endif
4081634Sbrian
4181634Sbrian#if STAT_MACROS_BROKEN
4281634Sbrian#undef S_ISBLK
4346686Sbrian#undef S_ISCHR
4446686Sbrian#undef S_ISDIR
4546686Sbrian#undef S_ISFIFO
4687544Sbrian#undef S_ISREG
4746686Sbrian#undef S_ISSOCK
4846686Sbrian#endif
4981634Sbrian#ifndef S_ISDIR
5081634Sbrian#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
5181634Sbrian#endif
5246686Sbrian#ifndef S_ISREG
5346686Sbrian#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
5446686Sbrian#endif
5546686Sbrian#if !defined(S_ISBLK) && defined(S_IFBLK)
5646686Sbrian#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
5746686Sbrian#endif
5846686Sbrian#if !defined(S_ISCHR) && defined(S_IFCHR)
5946686Sbrian#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
6046686Sbrian#endif
6146686Sbrian#if !defined(S_ISFIFO) && defined(S_IFFIFO)
6246686Sbrian#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFFIFO)
6346686Sbrian#endif
6446686Sbrian#if !defined(S_ISSOCK) && defined(S_IFSOCK)
6546686Sbrian#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
6646686Sbrian#endif
67
68#if HAVE_UNISTD_H
69#include <unistd.h>
70#endif
71
72#ifndef SEEK_SET
73#define SEEK_SET 0
74#endif
75#ifndef SEEK_CUR
76#define SEEK_CUR 1
77#endif
78
79#ifndef STDIN_FILENO
80#define STDIN_FILENO 0
81#endif
82#ifndef STDOUT_FILENO
83#define STDOUT_FILENO 1
84#endif
85#ifndef STDERR_FILENO
86#define STDERR_FILENO 2
87#endif
88
89/* I believe that all relevant systems have
90   time.h.  It is in ANSI, for example.  The
91   code below looks quite bogus as I don't think
92   sys/time.h is ever a substitute for time.h;
93   it is something different.  */
94#define HAVE_TIME_H 1
95
96#if HAVE_TIME_H
97#include <time.h>
98#else
99#include <sys/time.h>
100#endif
101
102#if HAVE_FCNTL_H
103#include <fcntl.h>
104#else
105#if HAVE_SYS_FILE_H
106#include <sys/file.h>
107#endif
108#endif
109
110#ifndef O_RDONLY
111#define O_RDONLY 0
112#endif
113
114#if HAVE_SYS_WAIT_H
115#include <sys/wait.h>
116#endif
117#ifndef WEXITSTATUS
118#define WEXITSTATUS(stat_val) ((unsigned) (stat_val) >> 8)
119#endif
120#ifndef WIFEXITED
121#define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
122#endif
123
124#ifndef STAT_BLOCKSIZE
125#if HAVE_ST_BLKSIZE
126#define STAT_BLOCKSIZE(s) (s).st_blksize
127#else
128#define STAT_BLOCKSIZE(s) (8 * 1024)
129#endif
130#endif
131
132#if HAVE_DIRENT_H
133# include <dirent.h>
134# define NAMLEN(dirent) strlen((dirent)->d_name)
135#else
136# define dirent direct
137# define NAMLEN(dirent) ((dirent)->d_namlen)
138# if HAVE_SYS_NDIR_H
139#  include <sys/ndir.h>
140# endif
141# if HAVE_SYS_DIR_H
142#  include <sys/dir.h>
143# endif
144# if HAVE_NDIR_H
145#  include <ndir.h>
146# endif
147#endif
148
149#if HAVE_VFORK_H
150#include <vfork.h>
151#endif
152
153#if HAVE_STDLIB_H || defined(STDC_HEADERS)
154#include <stdlib.h>
155#else
156VOID *malloc ();
157VOID *realloc ();
158#endif
159#ifndef getenv
160char *getenv ();
161#endif
162
163#if HAVE_LIMITS_H
164#include <limits.h>
165#endif
166#ifndef INT_MAX
167#define INT_MAX 2147483647
168#endif
169#ifndef CHAR_BIT
170#define CHAR_BIT 8
171#endif
172
173#if STDC_HEADERS || HAVE_STRING_H
174# include <string.h>
175# ifndef bzero
176#  define bzero(s, n) memset (s, 0, n)
177# endif
178#else
179# if !HAVE_STRCHR
180#  define strchr index
181#  define strrchr rindex
182# endif
183char *strchr (), *strrchr ();
184# if !HAVE_MEMCHR
185#  define memcmp(s1, s2, n) bcmp (s1, s2, n)
186#  define memcpy(d, s, n) bcopy (s, d, n)
187void *memchr ();
188# endif
189#endif
190
191#include <ctype.h>
192/* CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given
193   as an argument to <ctype.h> macros like `isspace'.  */
194#if STDC_HEADERS
195#define CTYPE_DOMAIN(c) 1
196#else
197#define CTYPE_DOMAIN(c) ((unsigned) (c) <= 0177)
198#endif
199#ifndef ISPRINT
200#define ISPRINT(c) (CTYPE_DOMAIN (c) && isprint (c))
201#endif
202#ifndef ISSPACE
203#define ISSPACE(c) (CTYPE_DOMAIN (c) && isspace (c))
204#endif
205#ifndef ISUPPER
206#define ISUPPER(c) (CTYPE_DOMAIN (c) && isupper (c))
207#endif
208
209#ifndef ISDIGIT
210#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
211#endif
212
213#include <errno.h>
214#if !STDC_HEADERS
215extern int errno;
216#endif
217
218#ifdef min
219#undef min
220#endif
221#ifdef max
222#undef max
223#endif
224#define min(a,b) ((a) <= (b) ? (a) : (b))
225#define max(a,b) ((a) >= (b) ? (a) : (b))
226
227/* This section contains Posix-compliant defaults for macros
228   that are meant to be overridden by hand in config.h as needed.  */
229
230#ifndef filename_cmp
231#define filename_cmp(a, b) strcmp (a, b)
232#endif
233
234#ifndef filename_lastdirchar
235#define filename_lastdirchar(filename) strrchr (filename, '/')
236#endif
237
238#ifndef HAVE_FORK
239#define HAVE_FORK 1
240#endif
241
242#ifndef HAVE_SETMODE
243#define HAVE_SETMODE 0
244#endif
245
246#ifndef initialize_main
247#define initialize_main(argcp, argvp)
248#endif
249
250/* Do struct stat *S, *T describe the same file?  Answer -1 if unknown.  */
251#ifndef same_file
252#define same_file(s,t) ((s)->st_ino==(t)->st_ino && (s)->st_dev==(t)->st_dev)
253#endif
254
255/* Place into Q a quoted version of A suitable for `popen' or `system',
256   incrementing Q and junking A.
257   Do not increment Q by more than 4 * strlen (A) + 2.  */
258#ifndef SYSTEM_QUOTE_ARG
259#define SYSTEM_QUOTE_ARG(q, a) \
260  { \
261    *(q)++ = '\''; \
262    for (;  *(a);  *(q)++ = *(a)++) \
263      if (*(a) == '\'') \
264	{ \
265	  *(q)++ = '\''; \
266	  *(q)++ = '\\'; \
267	  *(q)++ = '\''; \
268	} \
269    *(q)++ = '\''; \
270  }
271#endif
272
273/* these come from CVS's lib/system.h, but I wasn't sure how to include that
274 * properly or even if I really should
275 */
276#ifndef CVS_OPENDIR
277#define CVS_OPENDIR opendir
278#endif
279#ifndef CVS_READDIR
280#define CVS_READDIR readdir
281#endif
282#ifndef CVS_CLOSEDIR
283#define CVS_CLOSEDIR closedir
284#endif
285