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47 lines
2.4 KiB
C
47 lines
2.4 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 void _intsorter(int *A, size_t n) {
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int t, p;
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size_t i, j;
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if (n < 2) return;
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for (p = A[n / 2], 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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_intsorter(A, i);
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_intsorter(A + i, n - i);
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}
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/**
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* Tiny and reasonably fast sorting for ints.
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* @see djbsort
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*/
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void _intsort(int *A, size_t n) {
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_intsorter(A, n);
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if (n > 1000) {
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STRACE("_intsort(%p, %'zu)", A, n);
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}
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}
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