system.h: New file to get common systems includes and various definitions and...

 
	* system.h: New file to get common systems includes and various
	definitions and declarations based on autoconf macros.

From-SVN: r17891

gcc/ChangeLog

+Fri Feb 13 01:23:46 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+ 
+	* system.h: New file to get common systems includes and various
+	definitions and declarations based on autoconf macros.
+
 Fri Feb 13 00:46:19 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* cccp.c (new_include_prefix): Correctly handle -I./.

gcc/system.h

+/* system.h - Get common system includes and various definitions and
+   declarations based on autoconf macros.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+
+ */
+
+#ifndef __GCC_SYSTEM_H__
+#define __GCC_SYSTEM_H__
+
+#include <stdio.h>
+#include <ctype.h>
+
+/* Jim Meyering writes:
+ 
+   "... Some ctype macros are valid only for character codes that
+   isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
+   using /bin/cc or gcc but without giving an ansi option).  So, all
+   ctype uses should be through macros like ISPRINT...  If
+   STDC_HEADERS is defined, then autoconf has verified that the ctype
+   macros don't need to be guarded with references to isascii. ...
+   Defining isascii to 1 should let any compiler worth its salt
+   eliminate the && through constant folding."
+ 
+   Bruno Haible adds:
+ 
+   "... Furthermore, isupper(c) etc. have an undefined result if c is
+   outside the range -1 <= c <= 255. One is tempted to write isupper(c)
+   with c being of type `char', but this is wrong if c is an 8-bit
+   character >= 128 which gets sign-extended to a negative value.
+   The macro ISUPPER protects against this as well."  */
+ 
+#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
+# define IN_CTYPE_DOMAIN(c) 1
+#else
+# define IN_CTYPE_DOMAIN(c) isascii(c)
+#endif
+ 
+#ifdef isblank
+# define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
+#else
+# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
+#endif
+#ifdef isgraph
+# define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
+#else
+# define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
+#endif
+ 
+#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
+#define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
+#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
+#define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
+#define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
+#define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
+#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
+#define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
+#define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
+#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
+ 
+/* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
+   - Its arg may be any int or unsigned int; it need not be an unsigned char.
+   - It's guaranteed to evaluate its argument exactly once.
+   - It's typically faster.
+   Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
+   only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
+   it's important to use the locale's definition of `digit' even when the
+   host does not conform to Posix.  */
+#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
+
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#ifndef errno
+extern int errno;
+#endif
+
+#ifdef HAVE_STRING_H
+# include <string.h>
+#else
+# ifdef HAVE_STRINGS_H
+#  include <strings.h>
+# endif
+#endif
+
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+#if HAVE_LIMITS_H
+# include <limits.h>
+#endif
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+#  include <time.h>
+#endif
+#endif
+
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#else
+# include <sys/file.h>
+#endif
+
+#ifndef SEEK_SET
+# define SEEK_SET 0
+# define SEEK_CUR 1
+# define SEEK_END 2
+#endif
+#ifndef F_OK
+# define F_OK 0
+# define X_OK 1
+# define W_OK 2
+# define R_OK 4
+#endif
+
+
+
+#ifndef bcopy
+# ifdef HAVE_BCOPY
+#  ifdef NEED_DECLARATION_BCOPY
+void bcopy ();
+#  endif
+# else /* ! HAVE_BCOPY */
+#  define bcopy(src,dst,len) memcpy ((dst),(src),(len))
+# endif
+#endif
+
+#ifndef bcmp
+# ifdef HAVE_BCMP
+#  ifdef NEED_DECLARATION_BCMP
+void bcmp ();
+#  endif
+# else /* ! HAVE_BCMP */
+#  define bcmp(left,right,len) memcmp ((left),(right),(len))
+# endif
+#endif
+
+#ifndef bzero
+# ifdef HAVE_BZERO
+#  ifdef NEED_DECLARATION_BZERO
+void bzero ();
+#  endif
+# else /* ! HAVE_BZERO */
+#  define bzero(dst,len) memset ((dst),0,(len))
+# endif
+#endif
+
+#ifndef index
+# ifdef HAVE_INDEX
+#  ifdef NEED_DECLARATION_INDEX
+extern char *index ();
+#  endif
+# else /* ! HAVE_INDEX */
+#  define index strchr
+# endif
+#endif
+
+#ifndef rindex
+# ifdef HAVE_RINDEX
+#  ifdef NEED_DECLARATION_RINDEX
+extern char *rindex ();
+#  endif
+# else /* ! HAVE_RINDEX */
+#  define rindex strrchr
+# endif
+#endif
+
+#ifdef NEED_DECLARATION_FREE
+extern void free ();
+#endif
+
+#endif /* __GCC_SYSTEM_H__ */