mirror of
https://github.com/jart/cosmopolitan.git
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65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/intrin/strace.internal.h"
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#include "libc/runtime/runtime.h"
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static inline void InsertionSort(long *A, long n) {
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long i, j, t;
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for (i = 1; i < n; i++) {
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t = A[i];
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j = i - 1;
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while (j >= 0 && A[j] > t) {
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A[j + 1] = A[j];
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j = j - 1;
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}
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A[j + 1] = t;
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}
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}
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static void LongSort(long *A, long n) {
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long t, p, i, j;
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if (n <= 32) {
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InsertionSort(A, n);
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} else {
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for (p = A[n >> 1], i = 0, j = n - 1;; i++, j--) {
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while (A[i] < p) i++;
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while (A[j] > p) j--;
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if (i >= j) break;
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t = A[i];
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A[i] = A[j];
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A[j] = t;
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}
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LongSort(A, i);
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LongSort(A + i, n - i);
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}
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}
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/**
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* Sorting algorithm for longs that doesn't take long.
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*
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* "What disorder is this? Give me my long sort!"
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* -Lord Capulet
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*
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*/
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void _longsort(long *A, size_t n) {
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LongSort(A, n);
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if (n > 1000) {
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STRACE("_longsort(%p, %'zu)", A, n);
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}
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}
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