create new machine/_float.h which is namespace clean. create a new

MI float.h which pulls in and defines the values that are needed from
there, and repair sys/limits.h so that it defines the values it needs
as well (depending on POSIX version, XPG version, etc).  guenther has
a more exact selection of that coming for limits.h.
this also fixes a few mistakes for the vax.
reviewed by kettenis and guenther.

src/include/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.163 2012/06/19 17:15:02 espie Exp $
+#	$OpenBSD: Makefile,v 1.164 2012/06/26 16:16:16 deraadt Exp $
 #	$NetBSD: Makefile,v 1.59 1996/05/15 21:36:43 jtc Exp $
 
 #	@(#)Makefile	5.45.1.1 (Berkeley) 5/6/91
@@ -12,9 +12,9 @@
 # Missing: mp.h
 FILES=	a.out.h ar.h assert.h bitstring.h blf.h bm.h bsd_auth.h \
 	complex.h cpio.h ctype.h curses.h db.h dbm.h des.h dirent.h disktab.h \
-	dlfcn.h elf_abi.h err.h errno.h fenv.h fnmatch.h fstab.h fts.h ftw.h \
-	getopt.h glob.h grp.h ifaddrs.h inttypes.h iso646.h kvm.h langinfo.h \
-	libgen.h limits.h locale.h login_cap.h malloc.h math.h md4.h \
+	dlfcn.h elf_abi.h err.h errno.h fenv.h float.h fnmatch.h fstab.h fts.h \
+	ftw.h getopt.h glob.h grp.h ifaddrs.h inttypes.h iso646.h kvm.h \
+	langinfo.h libgen.h limits.h locale.h login_cap.h malloc.h math.h md4.h \
 	md5.h memory.h mpool.h ndbm.h netdb.h netgroup.h nlist.h nl_types.h \
 	ohash.h paths.h poll.h pwd.h ranlib.h re_comp.h \
 	readpassphrase.h regex.h resolv.h rmd160.h search.h setjmp.h \
@@ -30,7 +30,7 @@ FILES+=	link.h link_aout.h link_elf.h
 FILES+= ieeefp.h
 .endif
 
-MFILES=	float.h frame.h 
+MFILES=	frame.h
 LFILES=	fcntl.h syslog.h termios.h stdarg.h stdint.h varargs.h
 
 DIRS=	arpa protocols rpc rpcsvc

src/include/float.h

@@ -0,0 +1,95 @@
+/*	$OpenBSD: float.h,v 1.1 2012/06/26 16:16:16 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _FLOAT_H_
+#define _FLOAT_H_
+
+#include <sys/cdefs.h>
+#include <machine/_float.h>
+
+__BEGIN_DECLS
+int __flt_rounds(void);
+__END_DECLS
+
+#define FLT_RADIX	__FLT_RADIX		/* b */
+#define FLT_ROUNDS	__FLT_ROUNDS
+
+#if __ISO_C_VISIBLE >= 1999
+#define FLT_EVAL_METHOD	__FLT_EVAL_METHOD	/* long double */
+#endif
+
+#define FLT_MANT_DIG	__FLT_MANT_DIG		/* p */
+#define FLT_EPSILON	__FLT_EPSILON		/* b**(1-p) */
+#ifndef FLT_DIG
+#define FLT_DIG		__FLT_DIG		/* floor((p-1)*log10(b))+(b == 10) */
+#endif
+#define FLT_MIN_EXP	__FLT_MIN_EXP		/* emin */
+#ifndef FLT_MIN
+#define FLT_MIN		__FLT_MIN		/* b**(emin-1) */
+#endif
+#define FLT_MIN_10_EXP	__FLT_MIN_10_EXP	/* ceil(log10(b**(emin-1))) */
+#define FLT_MAX_EXP	__FLT_MAX_EXP		/* emax */
+#ifndef FLT_MAX
+#define FLT_MAX		__FLT_MAX		/* (1-b**(-p))*b**emax */
+#endif
+#define FLT_MAX_10_EXP	__FLT_MAX_10_EXP	/* floor(log10((1-b**(-p))*b**emax)) */
+
+#define DBL_MANT_DIG	__DBL_MANT_DIG
+#define DBL_EPSILON	__DBL_EPSILON
+#ifndef DBL_DIG
+#define DBL_DIG		__DBL_DIG
+#endif
+#define DBL_MIN_EXP	__DBL_MIN_EXP
+#ifndef DBL_MIN
+#define DBL_MIN		__DBL_MIN
+#endif
+#define DBL_MIN_10_EXP	__DBL_MIN_10_EXP
+#define DBL_MAX_EXP	__DBL_MAX_EXP
+#ifndef DBL_MAX
+#define DBL_MAX		__DBL_MAX
+#endif
+#define DBL_MAX_10_EXP	__DBL_MAX_10_EXP
+
+#define LDBL_MANT_DIG	__LDBL_MANT_DIG
+#define LDBL_EPSILON	__LDBL_EPSILON
+#define LDBL_DIG	__LDBL_DIG
+#define LDBL_MIN_EXP	__LDBL_MIN_EXP
+#define LDBL_MIN	__LDBL_MIN
+#define LDBL_MIN_10_EXP	__LDBL_MIN_10_EXP
+#define LDBL_MAX_EXP	__LDBL_MAX_EXP
+#define LDBL_MAX	__LDBL_MAX
+#define LDBL_MAX_10_EXP	__LDBL_MAX_10_EXP
+
+#if __ISO_C_VISIBLE >= 1999
+#define DECIMAL_DIG	__DECIMAL_DIG
+#endif
+
+#endif	/* _FLOAT_H_ */