From 58daab21cd043e1dc37024a7f99b396788372918 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 9 Mar 2024 14:19:48 +0100 Subject: Merging upstream version 1.44.3. Signed-off-by: Daniel Baumann --- web/server/h2o/libh2o/deps/klib/ksort.h | 298 ++++++++++++++++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 web/server/h2o/libh2o/deps/klib/ksort.h (limited to 'web/server/h2o/libh2o/deps/klib/ksort.h') diff --git a/web/server/h2o/libh2o/deps/klib/ksort.h b/web/server/h2o/libh2o/deps/klib/ksort.h new file mode 100644 index 000000000..4da7a13ef --- /dev/null +++ b/web/server/h2o/libh2o/deps/klib/ksort.h @@ -0,0 +1,298 @@ +/* The MIT License + + Copyright (c) 2008, 2011 Attractive Chaos + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + SOFTWARE. +*/ + +/* + 2011-04-10 (0.1.6): + + * Added sample + + 2011-03 (0.1.5): + + * Added shuffle/permutation + + 2008-11-16 (0.1.4): + + * Fixed a bug in introsort() that happens in rare cases. + + 2008-11-05 (0.1.3): + + * Fixed a bug in introsort() for complex comparisons. + + * Fixed a bug in mergesort(). The previous version is not stable. + + 2008-09-15 (0.1.2): + + * Accelerated introsort. On my Mac (not on another Linux machine), + my implementation is as fast as std::sort on random input. + + * Added combsort and in introsort, switch to combsort if the + recursion is too deep. + + 2008-09-13 (0.1.1): + + * Added k-small algorithm + + 2008-09-05 (0.1.0): + + * Initial version + +*/ + +#ifndef AC_KSORT_H +#define AC_KSORT_H + +#include +#include + +typedef struct { + void *left, *right; + int depth; +} ks_isort_stack_t; + +#define KSORT_SWAP(type_t, a, b) { register type_t t=(a); (a)=(b); (b)=t; } + +#define KSORT_INIT(name, type_t, __sort_lt) \ + void ks_mergesort_##name(size_t n, type_t array[], type_t temp[]) \ + { \ + type_t *a2[2], *a, *b; \ + int curr, shift; \ + \ + a2[0] = array; \ + a2[1] = temp? temp : (type_t*)malloc(sizeof(type_t) * n); \ + for (curr = 0, shift = 0; (1ul<> 1) - 1; i != (size_t)(-1); --i) \ + ks_heapadjust_##name(i, lsize, l); \ + } \ + void ks_heapsort_##name(size_t lsize, type_t l[]) \ + { \ + size_t i; \ + for (i = lsize - 1; i > 0; --i) { \ + type_t tmp; \ + tmp = *l; *l = l[i]; l[i] = tmp; ks_heapadjust_##name(0, i, l); \ + } \ + } \ + static inline void __ks_insertsort_##name(type_t *s, type_t *t) \ + { \ + type_t *i, *j, swap_tmp; \ + for (i = s + 1; i < t; ++i) \ + for (j = i; j > s && __sort_lt(*j, *(j-1)); --j) { \ + swap_tmp = *j; *j = *(j-1); *(j-1) = swap_tmp; \ + } \ + } \ + void ks_combsort_##name(size_t n, type_t a[]) \ + { \ + const double shrink_factor = 1.2473309501039786540366528676643; \ + int do_swap; \ + size_t gap = n; \ + type_t tmp, *i, *j; \ + do { \ + if (gap > 2) { \ + gap = (size_t)(gap / shrink_factor); \ + if (gap == 9 || gap == 10) gap = 11; \ + } \ + do_swap = 0; \ + for (i = a; i < a + n - gap; ++i) { \ + j = i + gap; \ + if (__sort_lt(*j, *i)) { \ + tmp = *i; *i = *j; *j = tmp; \ + do_swap = 1; \ + } \ + } \ + } while (do_swap || gap > 2); \ + if (gap != 1) __ks_insertsort_##name(a, a + n); \ + } \ + void ks_introsort_##name(size_t n, type_t a[]) \ + { \ + int d; \ + ks_isort_stack_t *top, *stack; \ + type_t rp, swap_tmp; \ + type_t *s, *t, *i, *j, *k; \ + \ + if (n < 1) return; \ + else if (n == 2) { \ + if (__sort_lt(a[1], a[0])) { swap_tmp = a[0]; a[0] = a[1]; a[1] = swap_tmp; } \ + return; \ + } \ + for (d = 2; 1ul<>1) + 1; \ + if (__sort_lt(*k, *i)) { \ + if (__sort_lt(*k, *j)) k = j; \ + } else k = __sort_lt(*j, *i)? i : j; \ + rp = *k; \ + if (k != t) { swap_tmp = *k; *k = *t; *t = swap_tmp; } \ + for (;;) { \ + do ++i; while (__sort_lt(*i, rp)); \ + do --j; while (i <= j && __sort_lt(rp, *j)); \ + if (j <= i) break; \ + swap_tmp = *i; *i = *j; *j = swap_tmp; \ + } \ + swap_tmp = *i; *i = *t; *t = swap_tmp; \ + if (i-s > t-i) { \ + if (i-s > 16) { top->left = s; top->right = i-1; top->depth = d; ++top; } \ + s = t-i > 16? i+1 : t; \ + } else { \ + if (t-i > 16) { top->left = i+1; top->right = t; top->depth = d; ++top; } \ + t = i-s > 16? i-1 : s; \ + } \ + } else { \ + if (top == stack) { \ + free(stack); \ + __ks_insertsort_##name(a, a+n); \ + return; \ + } else { --top; s = (type_t*)top->left; t = (type_t*)top->right; d = top->depth; } \ + } \ + } \ + } \ + /* This function is adapted from: http://ndevilla.free.fr/median/ */ \ + /* 0 <= kk < n */ \ + type_t ks_ksmall_##name(size_t n, type_t arr[], size_t kk) \ + { \ + type_t *low, *high, *k, *ll, *hh, *mid; \ + low = arr; high = arr + n - 1; k = arr + kk; \ + for (;;) { \ + if (high <= low) return *k; \ + if (high == low + 1) { \ + if (__sort_lt(*high, *low)) KSORT_SWAP(type_t, *low, *high); \ + return *k; \ + } \ + mid = low + (high - low) / 2; \ + if (__sort_lt(*high, *mid)) KSORT_SWAP(type_t, *mid, *high); \ + if (__sort_lt(*high, *low)) KSORT_SWAP(type_t, *low, *high); \ + if (__sort_lt(*low, *mid)) KSORT_SWAP(type_t, *mid, *low); \ + KSORT_SWAP(type_t, *mid, *(low+1)); \ + ll = low + 1; hh = high; \ + for (;;) { \ + do ++ll; while (__sort_lt(*ll, *low)); \ + do --hh; while (__sort_lt(*low, *hh)); \ + if (hh < ll) break; \ + KSORT_SWAP(type_t, *ll, *hh); \ + } \ + KSORT_SWAP(type_t, *low, *hh); \ + if (hh <= k) low = ll; \ + if (hh >= k) high = hh - 1; \ + } \ + } \ + void ks_shuffle_##name(size_t n, type_t a[]) \ + { \ + int i, j; \ + for (i = n; i > 1; --i) { \ + type_t tmp; \ + j = (int)(drand48() * i); \ + tmp = a[j]; a[j] = a[i-1]; a[i-1] = tmp; \ + } \ + } \ + void ks_sample_##name(size_t n, size_t r, type_t a[]) /* FIXME: NOT TESTED!!! */ \ + { /* reference: http://code.activestate.com/recipes/272884/ */ \ + int i, k, pop = n; \ + for (i = (int)r, k = 0; i >= 0; --i) { \ + double z = 1., x = drand48(); \ + type_t tmp; \ + while (x < z) z -= z * i / (pop--); \ + if (k != n - pop - 1) tmp = a[k], a[k] = a[n-pop-1], a[n-pop-1] = tmp; \ + ++k; \ + } \ + } + +#define ks_mergesort(name, n, a, t) ks_mergesort_##name(n, a, t) +#define ks_introsort(name, n, a) ks_introsort_##name(n, a) +#define ks_combsort(name, n, a) ks_combsort_##name(n, a) +#define ks_heapsort(name, n, a) ks_heapsort_##name(n, a) +#define ks_heapmake(name, n, a) ks_heapmake_##name(n, a) +#define ks_heapadjust(name, i, n, a) ks_heapadjust_##name(i, n, a) +#define ks_ksmall(name, n, a, k) ks_ksmall_##name(n, a, k) +#define ks_shuffle(name, n, a) ks_shuffle_##name(n, a) + +#define ks_lt_generic(a, b) ((a) < (b)) +#define ks_lt_str(a, b) (strcmp((a), (b)) < 0) + +typedef const char *ksstr_t; + +#define KSORT_INIT_GENERIC(type_t) KSORT_INIT(type_t, type_t, ks_lt_generic) +#define KSORT_INIT_STR KSORT_INIT(str, ksstr_t, ks_lt_str) + +#endif -- cgit v1.2.3