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authorUlrich Drepper <drepper@redhat.com>2000-10-09 15:37:39 +0000
committerUlrich Drepper <drepper@redhat.com>2000-10-09 15:37:39 +0000
commit0a7fef01597c934b6f6fd59eee28f30c4674670a (patch)
tree144022261eb1dc80828ff273e7011d0b467d41b4
parente340a2a2e21c455c57bb19d7495f00f44b666b63 (diff)
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Update.
2000-10-09 Jakub Jelinek <jakub@redhat.com> * sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward): If x == y, return y not x. * manual/arith.texi (nextafter): Document it. * sysdeps/ieee754/ldbl-96/s_nexttoward.c: Fix a comment.
-rw-r--r--CONFORMANCE35
-rw-r--r--ChangeLog7
-rw-r--r--manual/arith.texi2
-rw-r--r--sysdeps/ieee754/ldbl-128/s_nexttoward.c2
-rw-r--r--sysdeps/ieee754/ldbl-96/s_nexttoward.c2
5 files changed, 39 insertions, 9 deletions
diff --git a/CONFORMANCE b/CONFORMANCE
index bfb8291..c968754 100644
--- a/CONFORMANCE
+++ b/CONFORMANCE
@@ -62,9 +62,11 @@ of the C standard (as indicated by __STDC_VERSION__):
GCC options Standard version
-ansi ISO/IEC 9899:1990
-std=c89 ISO/IEC 9899:1990
--std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995
+-std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995 *
-std=c99 ISO/IEC 9899:1999
+* glibc does not support this standard version.
+
(Note that -std=c99 is not available in GCC 2.95.2, and that no
version of GCC presently existing implements the full C99 standard.)
@@ -127,8 +129,8 @@ library in use, so glibc defines them in <features.h>. Programs that
test them before including any standard headers may misbehave.
GCC doesn't support the optional imaginary types. Nor does it
-understand the keyword _Complex. This has the corresponding impact on
-the relevant headers.
+understand the keyword _Complex before GCC 3.0. This has the
+corresponding impact on the relevant headers.
glibc's use of extern inline conflicts with C99: in C99, extern inline
means that an external definition is generated as well as possibly an
@@ -162,7 +164,28 @@ Issues with headers
===================
There are various technical issues with the definitions contained in
-glibc's headers. See
+glibc's headers, listed below. The list below assumes current CVS GCC
+as of 2000-10-08, and relates to i686-linux; older GCC may lead to
+more problems in the headers.
+
+Note that the _t suffix is reserved by POSIX, but not by pure ISO C.
+Also, the Single Unix Specification generally requires more types to
+be included in headers (if _XOPEN_SOURCE is defined appropriately)
+than ISO C permits.
+
+<ctype.h> should not declare size_t.
+
+<inttypes.h> should not declare wchar_t.
+
+<signal.h> should not declare size_t.
+
+<stdint.h> should not declare wchar_t.
+
+<stdio.h> should not declare or use wchar_t, wint_t or off_t.
+
+<wchar.h> does not support AMD1; to support it, the functions
+fwprintf, fwscanf, wprintf, wscanf, swprintf, swscanf, vfwprintf,
+vwprintf, vswprintf and fwide would need to be declared when
+__STDC_VERSION__ >= 199409L and not just for C99.
-http://sources.redhat.com/ml/libc-alpha/2000-07/msg00259.html
-http://sources.redhat.com/ml/libc-alpha/2000-07/msg00279.html
+<wctype.h> should not declare size_t.
diff --git a/ChangeLog b/ChangeLog
index 2e0266d..5116a8c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2000-10-09 Jakub Jelinek <jakub@redhat.com>
+
+ * sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward): If x == y,
+ return y not x.
+ * manual/arith.texi (nextafter): Document it.
+ * sysdeps/ieee754/ldbl-96/s_nexttoward.c: Fix a comment.
+
2000-10-08 Ulrich Drepper <drepper@redhat.com>
* version.h (VERSION): Bump to 2.1.95.
diff --git a/manual/arith.texi b/manual/arith.texi
index e7f4365..1b62d76 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -1640,7 +1640,7 @@ false, but @code{signbit (-0.0)} will return a nonzero value.
The @code{nextafter} function returns the next representable neighbor of
@var{x} in the direction towards @var{y}. The size of the step between
@var{x} and the result depends on the type of the result. If
-@math{@var{x} = @var{y}} the function simply returns @var{x}. If either
+@math{@var{x} = @var{y}} the function simply returns @var{y}. If either
value is @code{NaN}, @code{NaN} is returned. Otherwise
a value corresponding to the value of the least significant bit in the
mantissa is added or subtracted, depending on the direction.
diff --git a/sysdeps/ieee754/ldbl-128/s_nexttoward.c b/sysdeps/ieee754/ldbl-128/s_nexttoward.c
index f121be2..2c654fb 100644
--- a/sysdeps/ieee754/ldbl-128/s_nexttoward.c
+++ b/sysdeps/ieee754/ldbl-128/s_nexttoward.c
@@ -50,7 +50,7 @@ static char rcsid[] = "$NetBSD: $";
((iy>=0x7fff000000000000LL)&&((iy-0x7fff000000000000LL)|ly)!=0))
/* y is nan */
return x+y;
- if((long double) x==y) return x; /* x=y, return x */
+ if((long double) x==y) return y; /* x=y, return y */
if((ix|lx)==0) { /* x == 0 */
double x2;
INSERT_WORDS(x,(u_int32_t)((hy>>32)&0x80000000),1);/* return +-minsub */
diff --git a/sysdeps/ieee754/ldbl-96/s_nexttoward.c b/sysdeps/ieee754/ldbl-96/s_nexttoward.c
index 941383e..9df393a 100644
--- a/sysdeps/ieee754/ldbl-96/s_nexttoward.c
+++ b/sysdeps/ieee754/ldbl-96/s_nexttoward.c
@@ -19,7 +19,7 @@ static char rcsid[] = "$NetBSD: $";
#endif
/* IEEE functions
- * nextafterx(x,y)
+ * nexttoward(x,y)
* return the next machine floating-point number of x in the
* direction toward y.
* Special cases: