Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [day] [month] [year] [list]
Date: Fri, 26 May 2023 11:40:01 +0200
From: Jens Gustedt <>
Subject: [C23 stdckdint.h 1/1] C23: add the stdckdint.h header for checked integer operations

These macros have a direct correspondence with gcc builtins, so the
implementation for musl is trivial. Note that this only intefaces the
type-generic features, so no function symbol is added to the
library. Since also this is a new header that only exposes its
contents when it is explicitly included, no feature test macros are
 include/stdckdint.h | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 include/stdckdint.h

diff --git a/include/stdckdint.h b/include/stdckdint.h
new file mode 100644
index 00000000..893126dc
--- /dev/null
+++ b/include/stdckdint.h
@@ -0,0 +1,8 @@
+#define __STDC_VERSION_STDCKDINT_H__ 202311L
+#define ckd_add(R, A, B) __builtin_add_overflow ((A), (B), (R))
+#define ckd_sub(R, A, B) __builtin_sub_overflow ((A), (B), (R))
+#define ckd_mul(R, A, B) __builtin_mul_overflow ((A), (B), (R))

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.