summaryrefslogtreecommitdiff
path: root/lib/stdckdint.in.h
diff options
context:
space:
mode:
Diffstat (limited to 'lib/stdckdint.in.h')
-rw-r--r--lib/stdckdint.in.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/stdckdint.in.h b/lib/stdckdint.in.h
new file mode 100644
index 00000000..762d3fdb
--- /dev/null
+++ b/lib/stdckdint.in.h
@@ -0,0 +1,35 @@
+/* stdckdint.h -- checked integer arithmetic
+
+ Copyright 2022 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ This program 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifndef _GL_STDCKDINT_H
+#define _GL_STDCKDINT_H
+
+#include "intprops-internal.h"
+
+/* Store into *R the low-order bits of A + B, A - B, A * B, respectively.
+ Return 1 if the result overflows, 0 otherwise.
+ A, B, and *R can have any integer type other than char, bool, a
+ bit-precise integer type, or an enumeration type.
+
+ These are like the standard macros introduced in C23, except that
+ arguments should not have side effects. */
+
+#define ckd_add(r, a, b) ((bool) _GL_INT_ADD_WRAPV (a, b, r))
+#define ckd_sub(r, a, b) ((bool) _GL_INT_SUBTRACT_WRAPV (a, b, r))
+#define ckd_mul(r, a, b) ((bool) _GL_INT_MULTIPLY_WRAPV (a, b, r))
+
+#endif /* _GL_STDCKDINT_H */