295 lines
6.1 KiB
C
295 lines
6.1 KiB
C
/* System dependent declarations.
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Copyright (C) 1988, 1989, 1992, 1993, 1994 Free Software Foundation, Inc.
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This file is part of GNU DIFF.
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GNU DIFF 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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GNU DIFF 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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*/
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/* We must define `volatile' and `const' first (the latter inside config.h),
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so that they're used consistently in all system includes. */
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#if !__STDC__
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#ifndef volatile
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#define volatile
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#endif
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#endif
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#include <config.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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/* Note that PARAMS is just internal to the diff library; diffrun.h
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has its own mechanism, which will hopefully be less likely to
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conflict with the library's caller's namespace. */
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#if __STDC__
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#define PARAMS(args) args
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#define VOID void
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#else
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#define PARAMS(args) ()
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#define VOID char
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#endif
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#if STAT_MACROS_BROKEN
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#undef S_ISBLK
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#undef S_ISCHR
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#undef S_ISDIR
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#undef S_ISFIFO
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#undef S_ISREG
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#undef S_ISSOCK
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#endif
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#ifndef S_ISDIR
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#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
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#endif
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#ifndef S_ISREG
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#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
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#endif
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#if !defined(S_ISBLK) && defined(S_IFBLK)
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#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
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#endif
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#if !defined(S_ISCHR) && defined(S_IFCHR)
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#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
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#endif
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#if !defined(S_ISFIFO) && defined(S_IFFIFO)
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#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFFIFO)
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#endif
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#if !defined(S_ISSOCK) && defined(S_IFSOCK)
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#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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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 HAVE_FCNTL_H
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# include <fcntl.h>
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#else
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# include <sys/file.h>
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#endif
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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#ifndef SEEK_CUR
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#define SEEK_CUR 1
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#endif
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#ifndef STDIN_FILENO
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#define STDIN_FILENO 0
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#endif
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#ifndef STDOUT_FILENO
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#define STDOUT_FILENO 1
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#endif
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#ifndef STDERR_FILENO
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#define STDERR_FILENO 2
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#endif
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/* I believe that all relevant systems have
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time.h. It is in ANSI, for example. The
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code below looks quite bogus as I don't think
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sys/time.h is ever a substitute for time.h;
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it is something different. */
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#define HAVE_TIME_H 1
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#if HAVE_TIME_H
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#include <time.h>
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#else
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#include <sys/time.h>
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#else
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#if HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#endif
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#ifndef O_RDONLY
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#define O_RDONLY 0
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#endif
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#if HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#ifndef WEXITSTATUS
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#define WEXITSTATUS(stat_val) ((unsigned) (stat_val) >> 8)
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#endif
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#ifndef WIFEXITED
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#define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
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#endif
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#ifndef STAT_BLOCKSIZE
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#if HAVE_ST_BLKSIZE
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#define STAT_BLOCKSIZE(s) (s).st_blksize
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#else
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#define STAT_BLOCKSIZE(s) (8 * 1024)
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#endif
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#endif
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#if HAVE_DIRENT_H
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# include <dirent.h>
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# define NAMLEN(dirent) strlen((dirent)->d_name)
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#else
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# define dirent direct
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# define NAMLEN(dirent) ((dirent)->d_namlen)
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# if HAVE_SYS_NDIR_H
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# include <sys/ndir.h>
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# endif
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# if HAVE_SYS_DIR_H
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# include <sys/dir.h>
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# endif
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# if HAVE_NDIR_H
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# include <ndir.h>
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# endif
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#endif
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#if HAVE_VFORK_H
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#include <vfork.h>
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#endif
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#if HAVE_STDLIB_H || defined(STDC_HEADERS)
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#include <stdlib.h>
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#else
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VOID *malloc ();
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VOID *realloc ();
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#endif
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#ifndef getenv
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char *getenv ();
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#endif
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#if HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifndef INT_MAX
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#define INT_MAX 2147483647
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#endif
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#ifndef CHAR_BIT
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#define CHAR_BIT 8
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#endif
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#if STDC_HEADERS || HAVE_STRING_H
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# include <string.h>
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# ifndef bzero
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# define bzero(s, n) memset (s, 0, n)
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# endif
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#else
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# if !HAVE_STRCHR
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# define strchr index
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# define strrchr rindex
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# endif
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char *strchr (), *strrchr ();
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# if !HAVE_MEMCHR
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# define memcmp(s1, s2, n) bcmp (s1, s2, n)
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# define memcpy(d, s, n) bcopy (s, d, n)
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void *memchr ();
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# endif
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#endif
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#include <ctype.h>
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/* CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given
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as an argument to <ctype.h> macros like `isspace'. */
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#if STDC_HEADERS
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#define CTYPE_DOMAIN(c) 1
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#else
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#define CTYPE_DOMAIN(c) ((unsigned) (c) <= 0177)
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#endif
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#ifndef ISPRINT
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#define ISPRINT(c) (CTYPE_DOMAIN (c) && isprint (c))
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#endif
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#ifndef ISSPACE
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#define ISSPACE(c) (CTYPE_DOMAIN (c) && isspace (c))
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#endif
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#ifndef ISUPPER
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#define ISUPPER(c) (CTYPE_DOMAIN (c) && isupper (c))
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#endif
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#ifndef ISDIGIT
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#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
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#endif
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#include <errno.h>
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#if !STDC_HEADERS
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extern int errno;
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#endif
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#ifdef min
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#undef min
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#endif
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#ifdef max
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#undef max
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#endif
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#define min(a,b) ((a) <= (b) ? (a) : (b))
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#define max(a,b) ((a) >= (b) ? (a) : (b))
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/* This section contains Posix-compliant defaults for macros
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that are meant to be overridden by hand in config.h as needed. */
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#ifndef filename_cmp
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#define filename_cmp(a, b) strcmp (a, b)
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#endif
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#ifndef filename_lastdirchar
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#define filename_lastdirchar(filename) strrchr (filename, '/')
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#endif
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#ifndef HAVE_FORK
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#define HAVE_FORK 1
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#endif
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#ifndef HAVE_SETMODE
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#define HAVE_SETMODE 0
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#endif
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#ifndef initialize_main
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#define initialize_main(argcp, argvp)
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#endif
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/* Do struct stat *S, *T describe the same file? Answer -1 if unknown. */
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#ifndef same_file
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#define same_file(s,t) ((s)->st_ino==(t)->st_ino && (s)->st_dev==(t)->st_dev)
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#endif
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/* Place into Q a quoted version of A suitable for `popen' or `system',
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incrementing Q and junking A.
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Do not increment Q by more than 4 * strlen (A) + 2. */
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#ifndef SYSTEM_QUOTE_ARG
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#define SYSTEM_QUOTE_ARG(q, a) \
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{ \
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*(q)++ = '\''; \
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for (; *(a); *(q)++ = *(a)++) \
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if (*(a) == '\'') \
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{ \
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*(q)++ = '\''; \
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*(q)++ = '\\'; \
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*(q)++ = '\''; \
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} \
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*(q)++ = '\''; \
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}
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#endif
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/* these come from CVS's lib/system.h, but I wasn't sure how to include that
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* properly or even if I really should
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*/
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#ifndef CVS_OPENDIR
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#define CVS_OPENDIR opendir
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#endif
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#ifndef CVS_READDIR
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#define CVS_READDIR readdir
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#endif
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#ifndef CVS_CLOSEDIR
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#define CVS_CLOSEDIR closedir
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#endif
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