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0a24b4fc3c
The *NSYNC linked list API is good enough that it deserves to be part of the C libray, so this change writes an improved version of it which uses that offsetof() trick from the Linux Kernel. We vendor all of the *NSYNC tests in third_party which helped confirm the needed refactoring is safe This change also deletes more old code that didn't pan out. My goal here is to work towards a vision where the Cosmopolitan core libraries become less experimental and more focused on curation. This better reflects the current level of quality we've managed to achieve.
46 lines
2.4 KiB
C
46 lines
2.4 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2016 Google Inc. │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/mem/mem.h"
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#include "libc/str/str.h"
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#include "third_party/nsync/array.internal.h"
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// clang-format off
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void a_ensure_ (void *v, int delta, int sz) {
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typedef A_TYPE (void *) a_void_ptr;
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a_void_ptr *a = (a_void_ptr *) v;
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int omax = a->h_.max_;
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if (omax < 0) {
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omax = -omax;
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}
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if (a->h_.len_ + delta > omax) {
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int nmax = a->h_.len_ + delta;
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void *na;
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if (nmax < omax * 2) {
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nmax = omax * 2;
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}
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if (a->h_.max_ <= 0) {
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na = malloc (nmax * sz);
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memcpy (na, a->a_, omax*sz);
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} else {
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na = realloc (a->a_, nmax*sz);
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}
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bzero (omax *sz + (char *)na, (nmax - omax) * sz);
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a->a_ = (void **) na;
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a->h_.max_ = nmax;
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}
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}
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