81e3e7e5d4
This patch implements `hcreate(_r)/hsearch(_r)/hdestroy(_r)` as specified in https://man7.org/linux/man-pages/man3/hsearch.3.html. Notice that `neon/asimd` extension is not yet added in this patch. - The implementation is largely simplified from rust's [`hashbrown`](https://github.com/rust-lang/hashbrown/blob/master/src/raw/mod.rs) as we only consider fix-sized insertion-only hashtables. Technical details are provided in code comments. - This patch also contains a portable string hash function, which is derived from [`aHash`](https://github.com/tkaitchuck/aHash)'s fallback routine. Not using any SIMD acceleration, it has a good enough quality (passing all SMHasher tests) and is not too bad in speed. - Some general functionalities are added, such as `memory_size`, `offset_to`(alignment), `next_power_of_two`, `is_power_of_two`. `ctz/clz` are extended to support shorter integers.
19 lines
545 B
Modula-2
19 lines
545 B
Modula-2
//===-- POSIX header search.h ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_SEARCH_H
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#define LLVM_LIBC_SEARCH_H
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#include <__llvm-libc-common.h>
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#define __need_size_t
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#include <stddef.h>
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%%public_api()
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#endif // LLVM_LIBC_SEARCH_H
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