mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
168 lines
7.8 KiB
C
168 lines
7.8 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 2020 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/str/str.h"
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#include "libc/dce.h"
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#include "libc/mem/alg.h"
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#include "libc/mem/gc.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/hyperion.h"
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#include "libc/testlib/testlib.h"
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#define MAKESTRING(NAME, VALUE) \
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char *NAME = strcpy(malloc(sizeof(VALUE) + 16), VALUE)
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char *strstr_naive(const char *haystack, const char *needle) {
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size_t i;
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if (haystack == needle || !*needle) return (void *)haystack;
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for (;;) {
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for (i = 0;; ++i) {
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if (!needle[i]) return (/*unconst*/ char *)haystack;
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if (!haystack[i]) break;
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if (needle[i] != haystack[i]) break;
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}
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if (!*haystack++) break;
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}
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return 0;
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}
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TEST(strstr, test_emptyString_isFoundAtBeginning) {
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MAKESTRING(haystack, "abc123def");
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ASSERT_STREQ(&haystack[0], strstr(haystack, gc(strdup(""))));
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free(haystack);
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}
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TEST(strstr, test_notFound) {
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MAKESTRING(haystack, "abc123def");
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ASSERT_EQ(NULL, strstr(haystack, gc(strdup("xyz"))));
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free(haystack);
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}
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TEST(strstr, test_notFound1) {
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MAKESTRING(haystack, "abc123def");
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ASSERT_EQ(NULL, strstr(haystack, gc(strdup("x"))));
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free(haystack);
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}
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TEST(strstr, test_middleOfString) {
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MAKESTRING(haystack, "abc123def");
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ASSERT_STREQ(&haystack[3], strstr(haystack, gc(strdup("123"))));
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free(haystack);
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}
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TEST(strstr, test_endOfString) {
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MAKESTRING(haystack, "abc123def");
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ASSERT_STREQ(&haystack[8], strstr(haystack, gc(strdup("f"))));
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free(haystack);
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}
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TEST(strstr, test_secondXmmWord) {
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MAKESTRING(haystack, "eeeeeeeeeeeeeeeebbbbbbbbbbb123");
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ASSERT_STREQ(&haystack[27], strstr(haystack, gc(strdup("123"))));
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free(haystack);
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}
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TEST(strstr, test_overlapsXmmWords) {
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MAKESTRING(haystack, "eeeeeeeeeeeeeeeebbbbbbbbbbbbbbb");
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ASSERT_STREQ(&haystack[15], strstr(haystack, gc(strdup("eb"))));
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free(haystack);
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}
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TEST(strstr, test) {
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ASSERT_EQ(NULL, strstr("x86_64-linux-musl-gcc", "clang"));
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ASSERT_STREQ("gcc", strstr("x86_64-linux-musl-gcc", "gcc"));
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ASSERT_EQ(NULL, strstr("-Wl,--gc-sections", "stack-protector"));
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ASSERT_EQ(NULL, strstr("-Wl,--gc-sections", "sanitize"));
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ASSERT_STREQ("x", strstr("x", "x"));
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}
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TEST(strstr, breakit) {
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char *p;
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p = gc(calloc(1, 32));
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p[0] = 'c';
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p[1] = 'c';
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p[10] = 'b';
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ASSERT_EQ(NULL, strstr(p, "b"));
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}
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/*
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* memmem naive l: 43,783c 14,142ns m: 31,285c 10,105ns
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* memmem l: 2,597c 839ns m: 2,612c 844ns
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* memmem l: 509c 164ns m: 599c 193ns
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*
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* strstr naive l: 103,057c 33,287ns m: 47,035c 15,192ns
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* strstr l: 3,186c 1,029ns m: 3,218c 1,039ns
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* strstr torture 1 l: 27c 9ns m: 61c 20ns
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* strstr torture 2 l: 2,322c 750ns m: 2,362c 763ns
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* strstr torture 4 l: 2,407c 777ns m: 2,448c 791ns
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* strstr torture 8 l: 2,803c 905ns m: 2,862c 924ns
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* strstr torture 16 l: 4,559c 1,473ns m: 3,614c 1,167ns
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* strstr torture 32 l: 5,324c 1,720ns m: 5,577c 1,801ns
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*
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* strcasestr naive l: 129,908c 41,959ns m: 155,420c 50,200ns
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* strcasestr l: 33,464c 10,809ns m: 31,636c 10,218ns
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* strcasestr tort 1 l: 38c 12ns m: 69c 22ns
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* strcasestr tort 2 l: 2,544c 822ns m: 2,580c 833ns
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* strcasestr tort 4 l: 2,745c 887ns m: 2,767c 894ns
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* strcasestr tort 8 l: 4,198c 1,356ns m: 4,216c 1,362ns
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* strcasestr tort 16 l: 7,402c 2,391ns m: 7,487c 2,418ns
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* strcasestr tort 32 l: 13,772c 4,448ns m: 12,945c 4,181ns
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*/
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BENCH(strstr, bench) {
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EZBENCH2("strstr naive", donothing,
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__expropriate(strstr_naive(kHyperion, "THE END")));
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EZBENCH2("strstr", donothing, __expropriate(strstr(kHyperion, "THE END")));
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EZBENCH2("strstr torture 1", donothing,
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__expropriate(strstr(
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab",
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"b")));
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EZBENCH2("strstr torture 2", donothing,
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__expropriate(strstr(
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab",
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"ab")));
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EZBENCH2("strstr torture 4", donothing,
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__expropriate(strstr(
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab",
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"aaab")));
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EZBENCH2("strstr torture 8", donothing,
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__expropriate(strstr(
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab",
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"aaaaaaab")));
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EZBENCH2("strstr torture 16", donothing,
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__expropriate(strstr(
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab",
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"aaaaaaaaaaaaaaab")));
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EZBENCH2("strstr torture 32", donothing,
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__expropriate(strstr(
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab",
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"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab")));
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}
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