cosmopolitan/test/libc/str/strlen_test.c

184 lines
6.6 KiB
C
Raw Normal View History

2020-06-15 14:18:57 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
2020-12-28 01:18:44 +00:00
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
2020-06-15 14:18:57 +00:00
2020-12-28 01:18:44 +00:00
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
2020-06-15 14:18:57 +00:00
*/
#include "libc/bits/bits.h"
#include "libc/macros.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/bsr.h"
#include "libc/nexgen32e/tinystrlen.internal.h"
#include "libc/rand/rand.h"
#include "libc/stdio/stdio.h"
2020-06-15 14:18:57 +00:00
#include "libc/str/str.h"
2020-10-27 10:39:46 +00:00
#include "libc/testlib/ezbench.h"
2020-06-15 14:18:57 +00:00
#include "libc/testlib/testlib.h"
char u8[] = "utf-8 ☻";
char16_t u16[] = u"utf16 ☻";
wchar_t u32[] = L"utf32 ☻";
TEST(strlen, usageExample_c11) {
_Alignas(16) char ugh[] = "eeeeeeeeeeeeeee\017";
EXPECT_EQ(1, strlen_pure(ugh + 15));
2020-06-15 14:18:57 +00:00
EXPECT_EQ(6 + 3, strlen(u8));
EXPECT_EQ(7, strlen16(u16));
EXPECT_EQ(7, wcslen(u32));
2020-06-15 14:18:57 +00:00
}
TEST(strlen, usageExample_c99) {
EXPECT_EQ(6 + 3, strlen(u8));
EXPECT_EQ(7, strlen16(u16));
EXPECT_EQ(7, wcslen(u32));
}
TEST(strlen, whatMemoryLooksLike) {
EXPECT_BINEQ(u"utf-8 Γÿ╗ ", u8); /* ← thompson-pike encoded */
EXPECT_BINEQ(u"u t f 1 6   ;&  ", u16);
EXPECT_BINEQ(u"u   t   f   3   2       ;&      ", u32);
}
TEST(strlen, test_const) {
const char buf[] = "hellothere";
ASSERT_EQ(0, strlen(""));
ASSERT_EQ(0, strnlen("e", 0));
ASSERT_EQ(10, strlen(buf));
}
TEST(strlen, test_nonconst) {
char buf[256];
unsigned i;
for (i = 0; i < 255; ++i) buf[i] = i + 1;
buf[i] = '\0';
ASSERT_EQ(255, strlen(buf));
}
TEST(strnlen, testconst) {
ASSERT_EQ(0, strnlen_s(NULL, 3));
ASSERT_EQ(0, strnlen("", 3));
ASSERT_EQ(0, strnlen("a", 0));
ASSERT_EQ(3, strnlen("123", 3));
ASSERT_EQ(2, strnlen("123", 2));
ASSERT_EQ(3, strnlen("123", 4));
}
TEST(strlen, testnonconst) {
2020-12-24 07:42:56 +00:00
/* this test case is a great example of why we need:
"m"(*(char(*)[0x7fffffff])StR)
rather than:
"m"(*StR) */
2020-06-15 14:18:57 +00:00
char buf[256];
unsigned i;
2020-12-24 07:42:56 +00:00
for (i = 0; i < 250; ++i) buf[i] = i + 1;
2020-06-15 14:18:57 +00:00
buf[i] = '\0';
2020-12-24 07:42:56 +00:00
ASSERT_EQ(250, strlen(buf));
2020-06-15 14:18:57 +00:00
}
TEST(strnlen_s, null_ReturnsZero) {
ASSERT_EQ(0, strnlen_s(NULL, 3));
}
TEST(strnlen, nulNotFound_ReturnsSize) {
int sizes[] = {1, 2, 7, 8, 15, 16, 31, 32, 33};
for (unsigned i = 0; i < ARRAYLEN(sizes); ++i) {
char *buf = malloc(sizes[i]);
2020-06-15 14:18:57 +00:00
memset(buf, ' ', sizes[i]);
ASSERT_EQ(sizes[i], strnlen(buf, sizes[i]), "%d", sizes[i]);
free(buf);
2020-06-15 14:18:57 +00:00
}
}
TEST(strnlen_s, nulNotFound_ReturnsZero) {
char buf[3] = {1, 2, 3};
ASSERT_EQ(0, strnlen_s(buf, 3));
}
TEST(tinystrlen, test) {
ASSERT_EQ(0, tinystrlen(""));
ASSERT_EQ(1, tinystrlen("a"));
ASSERT_EQ(3, tinystrlen("123"));
}
TEST(tinywcslen, test) {
ASSERT_EQ(0, tinywcslen(L""));
ASSERT_EQ(1, tinywcslen(L"a"));
ASSERT_EQ(3, tinywcslen(L"123"));
}
TEST(tinywcsnlen, test) {
EXPECT_EQ(0, tinywcsnlen(L"", 3));
EXPECT_EQ(0, tinywcsnlen(L"a", 0));
EXPECT_EQ(3, tinywcsnlen(L"123", 3));
EXPECT_EQ(2, tinywcsnlen(L"123", 2));
EXPECT_EQ(3, tinywcsnlen(L"123", 4));
}
TEST(tinystrlen16, test) {
ASSERT_EQ(0, tinystrlen16(u""));
ASSERT_EQ(1, tinystrlen16(u"a"));
ASSERT_EQ(3, tinystrlen16(u"123"));
}
TEST(tinystrnlen16, test) {
EXPECT_EQ(0, tinystrnlen16(u"", 3));
EXPECT_EQ(0, tinystrnlen16(u"a", 0));
EXPECT_EQ(3, tinystrnlen16(u"123", 3));
EXPECT_EQ(2, tinystrnlen16(u"123", 2));
EXPECT_EQ(3, tinystrnlen16(u"123", 4));
}
2020-10-27 10:39:46 +00:00
TEST(strlen, fuzz) {
char *b;
size_t n, n1, n2;
for (n = 2; n < 1026; ++n) {
b = rngset(calloc(1, n), n - 1, rand64, -1);
n1 = strlen(b);
n2 = strlen_pure(b);
ASSERT_EQ(n1, n2, "%#.*s", n, b);
n1 = strlen(b + 1);
n2 = strlen_pure(b + 1);
ASSERT_EQ(n1, n2);
free(b);
}
}
2020-10-27 10:39:46 +00:00
BENCH(strlen, bench) {
extern size_t strlen_(const char *) asm("strlen");
extern size_t strlen_pure_(const char *) asm("strlen_pure");
static char b[2048];
2020-10-27 10:39:46 +00:00
memset(b, -1, sizeof(b) - 1);
EZBENCH2("strlen 1", donothing, strlen_(""));
EZBENCH2("strlen_pure 1", donothing, strlen_pure_(""));
2020-10-27 10:39:46 +00:00
EZBENCH2("strlen 2", donothing, strlen_("1"));
EZBENCH2("strlen_pure 2", donothing, strlen_pure_("1"));
2020-10-27 10:39:46 +00:00
EZBENCH2("strlen 7", donothing, strlen_("123456"));
EZBENCH2("strlen_pure 7", donothing, strlen_pure_("123456"));
2020-10-27 10:39:46 +00:00
EZBENCH2("strlen 8", donothing, strlen_("1234567"));
EZBENCH2("strlen_pure 8", donothing, strlen_pure_("1234567"));
2020-10-27 10:39:46 +00:00
EZBENCH2("strlen 9", donothing, strlen_("12345678"));
EZBENCH2("strlen_pure 9", donothing, strlen_pure_("12345678"));
EZBENCH2("strlen 11", donothing, strlen_("12345678aa"));
EZBENCH2("strlen_pure 11", donothing, strlen_pure_("12345678aa"));
EZBENCH2("strlen 13", donothing, strlen_("12345678aabb"));
EZBENCH2("strlen_pure 13", donothing, strlen_pure_("12345678aabb"));
2020-10-27 10:39:46 +00:00
EZBENCH2("strlen 16", donothing, strlen_("123456781234567"));
EZBENCH2("strlen_pure 16", donothing, strlen_pure_("123456781234567"));
EZBENCH2("strlen 17", donothing, strlen_("123456781234567e"));
EZBENCH2("strlen_pure 17", donothing, strlen_pure_("123456781234567e"));
2020-10-27 10:39:46 +00:00
EZBENCH2("strlen 1023", donothing, strlen_(b));
EZBENCH2("strlen_pure 1023", donothing, strlen_pure_(b));
2020-10-27 10:39:46 +00:00
}