dynarray: new module

* config/srclist.txt: Mention the new files.
* lib/cdefs.h (__attribute_maybe_unused__): New macro,
like Gnulib’s _GL_ATTRIBUTE_MAYBE_UNUSED but with glibc
naming conventions.
* lib/libc-config.h: Use it instead of __glibc_likely.
* lib/dynarray.h, modules/dynarray: New files.
* lib/malloc/dynarray-skeleton.c, lib/malloc/dynarray.h:
* lib/malloc/dynarray_at_failure.c:
* lib/malloc/dynarray_emplace_enlarge.c:
* lib/malloc/dynarray_finalize.c, lib/malloc/dynarray_resize.c:
* lib/malloc/dynarray_resize_clear.c, modules/dynarray:
New files, from glibc with the following changes needed for
portability to compilers that are not recent-enough GCC.
* lib/malloc/dynarray_at_failure.c: Include stdlib.h, for abort.
(__libc_dynarray_at_failure) [!_LIBC]: Simply abort.
* lib/malloc/dynarray_emplace_enlarge.c:
* lib/malloc/dynarray_resize.c:
Include intprops.h, and use INT_MULTIPLY_WRAPV instead
of __builtin_mul_overflow.
* lib/malloc/dynarray.h (__libc_dynarray_at_failure):
Use _Noreturn instead of __attribute__ ((noreturn)).
* lib/malloc/dynarray_resize_clear.c: Do not include stdlib.h;
it’s not needed.
(__libc_dynarray_resize_clear): Do not do arithmetic on void *.
* lib/malloc/dynarray-skeleton.c (struct DYNARRAY_STRUCT):
Do not use anonymous unions, as they are not in C99. All uses changed.
Use __nonnull (X) instead of __attribute__ ((nonnull X)),
and __attribute_maybe_unused__ instead of __attribute__ ((unused)).

1 files changed, 31 insertions, 0 deletions

diff --git a/lib/dynarray.h b/lib/dynarray.h
new file mode 100644
index 0000000000..6da3e87e55
--- /dev/null
+++ b/lib/dynarray.h
@@ -0,0 +1,31 @@
+/* Type-safe arrays which grow dynamically.
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, 2021.  */
+
+#ifndef _GL_DYNARRAY_H
+#define _GL_DYNARRAY_H
+
+#include <libc-config.h>
+
+#define __libc_dynarray_at_failure gl_dynarray_at_failure
+#define __libc_dynarray_emplace_enlarge gl_dynarray_emplace_enlarge
+#define __libc_dynarray_finalize gl_dynarray_finalize
+#define __libc_dynarray_resize_clear gl_dynarray_resize_clear
+#define __libc_dynarray_resize gl_dynarray_resize
+#include <malloc/dynarray.h>
+
+#endif /* _GL_DYNARRAY_H */