mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-08 07:23:33 +00:00
6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
175 lines
6.8 KiB
C
175 lines
6.8 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/intrin/bits.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/stdio/rand.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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char u8[] = "utf-8 ☻";
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char16_t u16[] = u"utf16 ☻";
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wchar_t u32[] = L"utf32 ☻";
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size_t strlen_pure(const char *s) {
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size_t n = 0;
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while (*s++) ++n;
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return n;
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}
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TEST(strlen, usageExample_c11) {
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_Alignas(16) char ugh[] = "eeeeeeeeeeeeeee\017";
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EXPECT_EQ(1, strlen_pure(ugh + 15));
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EXPECT_EQ(6 + 3, strlen(u8));
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EXPECT_EQ(7, strlen16(u16));
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EXPECT_EQ(7, wcslen(u32));
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}
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TEST(strlen, usageExample_c99) {
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EXPECT_EQ(6 + 3, strlen(u8));
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EXPECT_EQ(7, strlen16(u16));
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EXPECT_EQ(7, wcslen(u32));
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}
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TEST(strlen, whatMemoryLooksLike) {
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EXPECT_BINEQ(u"utf-8 Γÿ╗ ", u8); /* ← thompson-pike encoded */
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EXPECT_BINEQ(u"u t f 1 6 ;& ", u16);
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EXPECT_BINEQ(u"u t f 3 2 ;& ", u32);
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}
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TEST(strlen, test_const) {
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const char buf[] = "hellothere";
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ASSERT_EQ(0, strlen(""));
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ASSERT_EQ(0, strnlen("e", 0));
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ASSERT_EQ(10, strlen(buf));
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}
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TEST(strlen, test_nonconst) {
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char buf[256];
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unsigned i;
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for (i = 0; i < 255; ++i) buf[i] = i + 1;
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buf[i] = '\0';
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ASSERT_EQ(255, strlen(buf));
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}
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TEST(strnlen, testconst) {
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ASSERT_EQ(0, strnlen_s(NULL, 3));
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ASSERT_EQ(0, strnlen("", 3));
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ASSERT_EQ(0, strnlen("a", 0));
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ASSERT_EQ(3, strnlen("123", 3));
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ASSERT_EQ(2, strnlen("123", 2));
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ASSERT_EQ(3, strnlen("123", 4));
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}
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TEST(strlen, testnonconst) {
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/* this test case is a great example of why we need:
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"m"(*(char(*)[0x7fffffff])StR)
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rather than:
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"m"(*StR) */
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char buf[256];
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unsigned i;
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for (i = 0; i < 250; ++i) buf[i] = i + 1;
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buf[i] = '\0';
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ASSERT_EQ(250, strlen(buf));
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}
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TEST(strnlen_s, null_ReturnsZero) {
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ASSERT_EQ(0, strnlen_s(NULL, 3));
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}
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TEST(strnlen, nulNotFound_ReturnsSize) {
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int sizes[] = {1, 2, 7, 8, 15, 16, 31, 32, 33};
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for (unsigned i = 0; i < ARRAYLEN(sizes); ++i) {
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char *buf = malloc(sizes[i]);
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memset(buf, ' ', sizes[i]);
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ASSERT_EQ(sizes[i], strnlen(buf, sizes[i]), "%d", sizes[i]);
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free(buf);
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}
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}
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TEST(strnlen_s, nulNotFound) {
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char buf[3] = {1, 2, 3};
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ASSERT_EQ(3, strnlen_s(buf, 3));
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}
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TEST(strlen, fuzz) {
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char *b;
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size_t n, n1, n2;
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for (n = 2; n < 1026; ++n) {
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b = rngset(calloc(1, n), n - 1, rand64, -1);
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n1 = strlen(b);
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n2 = strlen_pure(b);
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ASSERT_EQ(n1, n2, "%#.*s", n, b);
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n1 = strlen(b + 1);
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n2 = strlen_pure(b + 1);
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ASSERT_EQ(n1, n2);
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free(b);
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}
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}
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BENCH(strlen, bench) {
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extern size_t strlen_(const char *) asm("strlen");
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extern size_t strlen_pure_(const char *) asm("strlen_pure");
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static char b[2048];
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static char c[512];
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static char d[256];
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memset(b, -1, sizeof(b) - 1);
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memset(c, -1, sizeof(c) - 1);
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memset(d, -1, sizeof(d) - 1);
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EZBENCH2("strlen_sse 1", donothing, strlen_(""));
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EZBENCH2("strlen_swar 1", donothing, strlen_pure_(""));
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EZBENCH2("strlen_sse 2", donothing, strlen_("1"));
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EZBENCH2("strlen_swar 2", donothing, strlen_pure_("1"));
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EZBENCH2("strlen_sse 3", donothing, strlen_("11"));
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EZBENCH2("strlen_swar 3", donothing, strlen_pure_("11"));
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EZBENCH2("strlen_sse 4", donothing, strlen_("113"));
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EZBENCH2("strlen_swar 4", donothing, strlen_pure_("113"));
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EZBENCH2("strlen_sse 7", donothing, strlen_("123456"));
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EZBENCH2("strlen_swar 7", donothing, strlen_pure_("123456"));
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EZBENCH2("strlen_sse 8", donothing, strlen_("1234567"));
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EZBENCH2("strlen_swar 8", donothing, strlen_pure_("1234567"));
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EZBENCH2("strlen_sse 9", donothing, strlen_("12345678"));
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EZBENCH2("strlen_swar 9", donothing, strlen_pure_("12345678"));
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EZBENCH2("strlen_sse 11", donothing, strlen_("12345678aa"));
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EZBENCH2("strlen_swar 11", donothing, strlen_pure_("12345678aa"));
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EZBENCH2("strlen_sse 13", donothing, strlen_("12345678aabb"));
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EZBENCH2("strlen_swar 13", donothing, strlen_pure_("12345678aabb"));
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EZBENCH2("strlen_sse 16", donothing, strlen_("123456781234567"));
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EZBENCH2("strlen_swar 16", donothing, strlen_pure_("123456781234567"));
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EZBENCH2("strlen_sse 17", donothing, strlen_("123456781234567e"));
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EZBENCH2("strlen_swar 17", donothing, strlen_pure_("123456781234567e"));
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EZBENCH2("strlen_sse 34", donothing,
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strlen_("123456781234567e123456781234567ee"));
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EZBENCH2("strlen_swar 34", donothing,
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strlen_pure_("123456781234567e123456781234567ee"));
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EZBENCH2("strlen_sse 68", donothing,
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strlen_("123456781234567e123456781234567ee123456781234567e1234567812"
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"34567eee"));
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EZBENCH2("strlen_swar 68", donothing,
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strlen_pure_("123456781234567e123456781234567ee123456781234567e12345"
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"6781234567eee"));
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EZBENCH2("strlen_sse 256", donothing, strlen_(d));
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EZBENCH2("strlen_swar 256", donothing, strlen_pure_(d));
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EZBENCH2("strlen_sse 512", donothing, strlen_(c));
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EZBENCH2("strlen_swar 512", donothing, strlen_pure_(c));
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EZBENCH2("strlen_sse 2048", donothing, strlen_(b));
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EZBENCH2("strlen_swar 2048", donothing, strlen_pure_(b));
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}
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