aboutsummaryrefslogtreecommitdiff
path: root/bits/fenv.h
diff options
context:
space:
mode:
Diffstat (limited to 'bits/fenv.h')
-rw-r--r--bits/fenv.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/bits/fenv.h b/bits/fenv.h
new file mode 100644
index 0000000..f45deb0
--- /dev/null
+++ b/bits/fenv.h
@@ -0,0 +1,61 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _FENV_H
+#error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+
+/* Here should be the exception be defined:
+ FE_INVALID
+ FE_DIVBYZERO
+ FE_OVERFLOW
+ FE_UNDERFLOW
+ FE_INEXACT
+ We define no macro which signals no exception is supported. */
+
+#define FE_ALL_EXCEPT 0
+
+
+/* Here should the rounding modes be defined:
+ FE_TONEAREST
+ FE_DOWNWARD
+ FE_UPWARD
+ FE_TOWARDSZERO
+ We define no macro which signals no rounding mode is selectable. */
+
+
+/* Type representing exception flags.
+ XXX Probably we should also include the signal handler here. */
+typedef struct
+ {
+ unsigned int flags;
+ }
+fexcept_t;
+
+
+/* Type representing floating-point environment. */
+typedef struct
+ {
+ fexcept_t excepts;
+ /* XXX I don't know what else we should save. */
+ }
+fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((fenv_t *) -1l)