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Date: Thu, 25 May 2023 16:44:58 +0200
From: Jens Gustedt <Jens.Gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: [C23 const 0/2] some interfaces become type-generic
In C23, some interfaces become type-generic with the aim that they
respect the const-contract for their pointer parameters.
With the functions alone, non-qualified pointers of buffers that are
`const`-qualified can escape. The type-generic functions/macros at an
additional security here, that compilers may then check.
This code needs `_Generic`, so it only works for compilers with at
least C11. Other compilers should still see the function interfaces as
before.
Jens Gustedt (2):
C23: change bsearch to a macro that respects the const contract
C23: change string.h and wchar.h interfaces to macros that respects
the const contract
include/stdlib.h | 12 +++++++++-
include/string.h | 54 ++++++++++++++++++++++++++++++++++++++-----
include/wchar.h | 55 +++++++++++++++++++++++++++++++++++++++-----
src/include/stdlib.h | 2 ++
src/include/string.h | 6 +++++
src/include/wchar.h | 6 +++++
src/stdlib/bsearch.c | 2 +-
src/string/memchr.c | 2 +-
src/string/strchr.c | 2 +-
src/string/strpbrk.c | 2 +-
src/string/strrchr.c | 2 +-
src/string/strstr.c | 2 +-
src/string/wcschr.c | 2 +-
src/string/wcspbrk.c | 2 +-
src/string/wcsrchr.c | 2 +-
src/string/wcsstr.c | 2 +-
src/string/wmemchr.c | 2 +-
17 files changed, 133 insertions(+), 24 deletions(-)
--
2.34.1
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