/*-*- 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 │ │ │ │ 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. │ │ │ │ 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. │ ╚─────────────────────────────────────────────────────────────────────────────*/ #include "libc/assert.h" #include "libc/dce.h" #include "libc/intrin/bits.h" #include "libc/macros.internal.h" #include "libc/mem/mem.h" #include "libc/nexgen32e/cachesize.h" #include "libc/nexgen32e/x86feature.h" #include "libc/runtime/gc.internal.h" #include "libc/stdio/rand.h" #include "libc/stdio/stdio.h" #include "libc/str/str.h" #include "libc/testlib/ezbench.h" #include "libc/testlib/hyperion.h" #include "libc/testlib/testlib.h" int (*memcmpi)(const void *, const void *, size_t) = memcmp; /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § emptiness ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ TEST(strcmp, emptyString) { EXPECT_EQ(0, strcmp("", "")); EXPECT_NE(0, strcmp("", "a")); } TEST(strcasecmp, emptyString) { EXPECT_EQ(0, strcasecmp("", "")); EXPECT_NE(0, strcasecmp("", "a")); } TEST(strcmp16, emptyString) { EXPECT_EQ(0, strcmp16(u"", u"")); EXPECT_NE(0, strcmp16(u"", u"a")); } TEST(strcasecmp16, emptyString) { EXPECT_EQ(0, strcasecmp16(u"", u"")); EXPECT_NE(0, strcasecmp16(u"", u"a")); } TEST(wcscmp, emptyString) { EXPECT_EQ(0, wcscmp(L"", L"")); EXPECT_NE(0, wcscmp(L"", L"a")); } TEST(wcscasecmp, emptyString) { EXPECT_EQ(0, wcscasecmp(L"", L"")); EXPECT_NE(0, wcscasecmp(L"", L"a")); } TEST(strncmp, nullString) { char *s1 = malloc(0); char *s2 = malloc(0); ASSERT_NE(s1, s2); ASSERT_EQ(0, strncmp(s1, s2, 0)); free(s2); free(s1); } TEST(strncmp, emptyString) { char *s1 = strcpy(malloc(1), ""); char *s2 = strcpy(malloc(1), ""); ASSERT_EQ(0, strncmp(s1, s2, 0)); ASSERT_EQ(0, strncmp(s1, s2, 1)); ASSERT_EQ(0, strncmp(s1, s2, -1)); ASSERT_EQ(0, strncmp(s1, s1, -1)); ASSERT_EQ(0, strncmp(s2, s2, -1)); free(s2); free(s1); } TEST(strncasecmp, emptyString) { char *s1 = strcpy(malloc(1), ""); char *s2 = strcpy(malloc(1), ""); ASSERT_EQ(0, strncasecmp(s1, s2, 0)); ASSERT_EQ(0, strncasecmp(s1, s2, 1)); ASSERT_EQ(0, strncasecmp(s1, s2, -1)); ASSERT_EQ(0, strncasecmp(s1, s1, -1)); ASSERT_EQ(0, strncasecmp(s2, s2, -1)); free(s2); free(s1); } /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § inequality ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ TEST(strncmp, testInequality) { char *s1 = strcpy(malloc(2), "1"); char *s2 = strcpy(malloc(1), ""); ASSERT_EQ(0, strncmp(s1, s2, 0)); ASSERT_EQ('1', strncmp(s1, s2, 1)); ASSERT_EQ(-'1', strncmp(s2, s1, 1)); free(s2); free(s1); } /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § does it work? ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ TEST(memcmp, test) { EXPECT_EQ(memcmpi("\200", "\200", 1), 0); EXPECT_LT(memcmpi("\177", "\200", 1), 0); EXPECT_GT(memcmpi("\200", "\177", 1), 0); EXPECT_EQ(memcmpi("", "", 0), 0); EXPECT_EQ(memcmpi("a", "a", 1), 0); EXPECT_GT(memcmpi("a", "A", 1), 0); EXPECT_LT(memcmpi("A", "a", 1), 0); EXPECT_LT(memcmpi("\001", "\377", 1), 0); EXPECT_GT(memcmpi("\377", "\001", 1), 0); EXPECT_EQ(memcmpi("a", "aa", 1), 0); EXPECT_EQ(memcmpi("aa", "a", 1), 0); EXPECT_LT(memcmpi("a", "aa", 2), 0); EXPECT_GT(memcmpi("aa", "a", 2), 0); EXPECT_LT(memcmpi("aaaaaaaaaaaaaaa\001", "aaaaaaaaaaaaaaa\377", 16), 0); EXPECT_GT(memcmpi("aaaaaaaaaaaaaaa\377", "aaaaaaaaaaaaaaa\001", 16), 0); EXPECT_LT(memcmpi("aaaaaaaaaaaaaaaa\001", "aaaaaaaaaaaaaaaa\377", 17), 0); EXPECT_GT(memcmpi("aaaaaaaaaaaaaaaa\377", "aaaaaaaaaaaaaaaa\001", 17), 0); EXPECT_LT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377", 32), 0); EXPECT_GT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001", 32), 0); EXPECT_LT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377", 33), 0); EXPECT_GT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001", 33), 0); EXPECT_LT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377", 34), 0); EXPECT_GT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001", 34), 0); } TEST(strcmp, testItWorks) { EXPECT_EQ(strcmp("", ""), 0); EXPECT_EQ(strcmp("a", "a"), 0); EXPECT_GT(strcmp("a", "A"), 0); EXPECT_LT(strcmp("A", "a"), 0); EXPECT_LT(strcmp("\001", "\377"), 0); EXPECT_GT(strcmp("\377", "\001"), 0); EXPECT_LT(strcmp("a", "aa"), 0); EXPECT_GT(strcmp("aa", "a"), 0); EXPECT_LT(strcmp("a\000", "aa\000"), 0); EXPECT_GT(strcmp("aa\000", "a\000"), 0); EXPECT_LT(strcmp("aaaaaaaaaaaaaaa\001", "aaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp("aaaaaaaaaaaaaaa\377", "aaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp("aaaaaaaaaaaaaaaa\001", "aaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp("aaaaaaaaaaaaaaaa\377", "aaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001"), 0); } TEST(strcasecmp, testItWorks) { EXPECT_EQ(strcasecmp("", ""), 0); EXPECT_EQ(strcasecmp("a", "a"), 0); EXPECT_EQ(strcasecmp("a", "A"), 0); EXPECT_EQ(strcasecmp("A", "a"), 0); EXPECT_LT(strcasecmp("a", "z"), 0); EXPECT_GT(strcasecmp("z", "a"), 0); EXPECT_LT(strcasecmp("\001", "\377"), 0); EXPECT_GT(strcasecmp("\377", "\001"), 0); EXPECT_LT(strcasecmp("a", "aa"), 0); EXPECT_GT(strcasecmp("aa", "a"), 0); EXPECT_LT(strcasecmp("a\000", "aa\000"), 0); EXPECT_GT(strcasecmp("aa\000", "a\000"), 0); EXPECT_LT(strcasecmp("aaaaaaaaaaaaaaa\001", "aaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcasecmp("aaaaaaaaaaaaaaa\377", "aaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcasecmp("aaaaaaaaaaaaaaaa\001", "aaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcasecmp("aaaaaaaaaaaaaaaa\377", "aaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcasecmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcasecmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcasecmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcasecmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcasecmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcasecmp("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001"), 0); } TEST(strcmp16, testItWorks) { EXPECT_EQ(strcmp16(u"", u""), 0); EXPECT_EQ(strcmp16(u"a", u"a"), 0); EXPECT_GT(strcmp16(u"a", u"A"), 0); EXPECT_LT(strcmp16(u"A", u"a"), 0); EXPECT_LT(strcmp16(u"\001", u"\377"), 0); EXPECT_GT(strcmp16(u"\377", u"\001"), 0); EXPECT_LT(strcmp16(u"a", u"aa"), 0); EXPECT_GT(strcmp16(u"aa", u"a"), 0); EXPECT_LT(strcmp16(u"a\000", u"aa\000"), 0); EXPECT_GT(strcmp16(u"aa\000", u"a\000"), 0); EXPECT_LT(strcmp16(u"aaaaaaaaaaaaaaa\001", u"aaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp16(u"aaaaaaaaaaaaaaa\377", u"aaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp16(u"aaaaaaaaaaaaaaaa\001", u"aaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp16(u"aaaaaaaaaaaaaaaa\377", u"aaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp16(u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001", u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp16(u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377", u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp16(u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001", u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp16(u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377", u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(strcmp16(u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001", u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(strcmp16(u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377", u"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001"), 0); } TEST(wcscmp, testItWorks) { EXPECT_EQ(wcscmp(L"", L""), 0); EXPECT_EQ(wcscmp(L"a", L"a"), 0); EXPECT_GT(wcscmp(L"a", L"A"), 0); EXPECT_LT(wcscmp(L"A", L"a"), 0); EXPECT_LT(wcscmp(L"\001", L"\377"), 0); EXPECT_GT(wcscmp(L"\377", L"\001"), 0); EXPECT_LT(wcscmp(L"a", L"aa"), 0); EXPECT_GT(wcscmp(L"aa", L"a"), 0); EXPECT_LT(wcscmp(L"a", L"aa"), 0); EXPECT_GT(wcscmp(L"aa", L"a"), 0); EXPECT_LT(wcscmp(L"aaaaaaaaaaaaaaa\001", L"aaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(wcscmp(L"aaaaaaaaaaaaaaa\377", L"aaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(wcscmp(L"aaaaaaaaaaaaaaaa\001", L"aaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(wcscmp(L"aaaaaaaaaaaaaaaa\377", L"aaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(wcscmp(L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001", L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(wcscmp(L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\377", L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(wcscmp(L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001", L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(wcscmp(L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\377", L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaa\001"), 0); EXPECT_LT(wcscmp(L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001", L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377"), 0); EXPECT_GT(wcscmp(L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\377", L"aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\001"), 0); } TEST(strcasecmp, testItWorksCase) { EXPECT_EQ(0, strcasecmp("hello", "HELLO")); EXPECT_EQ(0, strcasecmp("hello", "Hello")); EXPECT_EQ(0, strcasecmp("hello", "hello")); EXPECT_NE(0, strcasecmp("hello", "yello")); } TEST(strcasecmp16, testItWorksCase) { EXPECT_EQ(0, strcasecmp16(u"hello", u"HELLO")); EXPECT_EQ(0, strcasecmp16(u"hello", u"Hello")); EXPECT_EQ(0, strcasecmp16(u"hello", u"hello")); EXPECT_NE(0, strcasecmp16(u"hello", u"yello")); } TEST(wcscasecmp, testItWorksCase) { EXPECT_EQ(0, wcscasecmp(L"hello", L"HELLO")); EXPECT_EQ(0, wcscasecmp(L"hello", L"Hello")); EXPECT_EQ(0, wcscasecmp(L"hello", L"hello")); EXPECT_NE(0, wcscasecmp(L"hello", L"yello")); } /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § nontrivial length ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ TEST(strncmp, testEqualManyNs) { char *s1 = malloc(PAGESIZE); char *s2 = malloc(PAGESIZE); memset(s1, 7, PAGESIZE); memset(s2, 7, PAGESIZE); s1[PAGESIZE - 1] = '\0'; s2[PAGESIZE - 1] = '\0'; for (unsigned i = 1; i <= 128; ++i) { ASSERT_EQ(0, strncmp(s1 + PAGESIZE - i, s2 + PAGESIZE - i, i + 0)); ASSERT_EQ(0, strncmp(s1 + PAGESIZE - i, s2 + PAGESIZE - i, i + 1)); } free(s2); free(s1); } TEST(strncmp, testNotEqualManyNs) { char *s1 = malloc(PAGESIZE); char *s2 = malloc(PAGESIZE); for (unsigned i = 1; i <= 128; ++i) { memset(s1, 7, PAGESIZE); memset(s2, 7, PAGESIZE); s1[PAGESIZE - 1] = (unsigned char)0; s2[PAGESIZE - 1] = (unsigned char)255; ASSERT_EQ(-255, strncmp(s1 + PAGESIZE - i, s2 + PAGESIZE - i, i + 0)); ASSERT_EQ(-255, strncmp(s1 + PAGESIZE - i, s2 + PAGESIZE - i, i + 1)); } free(s2); free(s1); } /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § nul termination vs. explicit length ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ TEST(strncmp, testStringNulTerminatesBeforeExplicitLength) { const char kRdi[] = ""; const char kRsi[] = "TZ=America/Los_Angeles"; char *rdi = memcpy(malloc(sizeof(kRdi)), kRdi, sizeof(kRdi)); char *rsi = memcpy(malloc(sizeof(kRsi)), kRsi, sizeof(kRsi)); size_t rdx = 3; EXPECT_EQ(strncmp(rdi, rdi, rdx), 0); EXPECT_LT(strncmp(rdi, rsi, rdx), 0); EXPECT_GT(strncmp(rsi, rdi, rdx), 0); free(rsi); free(rdi); } TEST(strncasecmp, testStringNulTerminatesBeforeExplicitLength) { const char kRdi[] = ""; const char kRsi[] = "TZ=America/Los_Angeles"; char *rdi = memcpy(malloc(sizeof(kRdi)), kRdi, sizeof(kRdi)); char *rsi = memcpy(malloc(sizeof(kRsi)), kRsi, sizeof(kRsi)); size_t rdx = 3; EXPECT_EQ(strncasecmp(rdi, rdi, rdx), 0); EXPECT_LT(strncasecmp(rdi, rsi, rdx), 0); EXPECT_GT(strncasecmp(rsi, rdi, rdx), 0); free(rsi); free(rdi); } TEST(strncmp16, testStringNulTerminatesBeforeExplicitLength) { const char16_t kRdi[] = u""; const char16_t kRsi[] = u"TZ=America/Los_Angeles"; char16_t *rdi = memcpy(malloc(sizeof(kRdi)), kRdi, sizeof(kRdi)); char16_t *rsi = memcpy(malloc(sizeof(kRsi)), kRsi, sizeof(kRsi)); size_t rdx = 3; EXPECT_EQ(strncmp16(rdi, rdi, rdx), 0); EXPECT_LT(strncmp16(rdi, rsi, rdx), 0); EXPECT_GT(strncmp16(rsi, rdi, rdx), 0); free(rsi); free(rdi); } /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § two's complement bane ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ TEST(strcmp, testTwosComplementBane_hasUnsignedBehavior) { EXPECT_EQ(strcmp("\200", "\200"), 0); EXPECT_LT(strcmp("\x7f", "\x80"), 0); EXPECT_GT(strcmp("\x80", "\x7f"), 0); } TEST(strcasecmp, testTwosComplementBane_hasUnsignedBehavior) { EXPECT_EQ(strcasecmp("\200", "\200"), 0); EXPECT_LT(strcasecmp("\x7f", "\x80"), 0); EXPECT_GT(strcasecmp("\x80", "\x7f"), 0); } TEST(memcmp, testTwosComplementBane_unsignedBehavior) { EXPECT_EQ(memcmpi("\200", "\200", 1), 0); EXPECT_LT(memcmpi("\177", "\200", 1), 0); EXPECT_GT(memcmpi("\200", "\177", 1), 0); EXPECT_EQ(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\200", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\200", 34), 0); EXPECT_LT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\177", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\200", 34), 0); EXPECT_GT(memcmpi("aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\200", "aaaaaaaaabaaaaaaaaaaaaaaaaaaaaaaa\177", 34), 0); } TEST(strcmp16, testTwosComplementBane_hasUnsignedBehavior) { char16_t *B1 = malloc(8); char16_t *B2 = malloc(8); B1[1] = L'\0'; B2[1] = L'\0'; EXPECT_EQ(strcmp16(memcpy(B1, "\x00\x80", 2), memcpy(B2, "\x00\x80", 2)), 0); EXPECT_LT(strcmp16(memcpy(B1, "\xff\x7f", 2), memcpy(B2, "\x00\x80", 2)), 0); EXPECT_GT(strcmp16(memcpy(B1, "\x00\x80", 2), memcpy(B2, "\xff\x7f", 2)), 0); free(B2); free(B1); } TEST(strncmp16, testTwosComplementBane_hasUnsignedBehavior) { char16_t *B1 = malloc(4); char16_t *B2 = malloc(4); EXPECT_EQ(strncmp16(memcpy(B1, "\x00\x80", 2), memcpy(B2, "\x00\x80", 2), 1), 0); EXPECT_LT(strncmp16(memcpy(B1, "\xff\x7f", 2), memcpy(B2, "\x00\x80", 2), 1), 0); EXPECT_GT(strncmp16(memcpy(B1, "\x00\x80", 2), memcpy(B2, "\xff\x7f", 2), 1), 0); free(B2); free(B1); } TEST(wcscmp, testTwosComplementBane) { wchar_t *B1 = malloc(8); wchar_t *B2 = malloc(8); B1[1] = L'\0'; B2[1] = L'\0'; EXPECT_EQ(wcscmp(memcpy(B1, "\x00\x00\x00\x80", 4), memcpy(B2, "\x00\x00\x00\x80", 4)), 0); EXPECT_EQ(-1, wcscmp(memcpy(B1, "\xff\xff\xff\x7f", 4), memcpy(B2, "\x00\x00\x00\x80", 4))); EXPECT_EQ(wcscmp(memcpy(B1, "\x00\x00\x00\x80", 4), memcpy(B2, "\xff\xff\xff\x7f", 4)), 1); free(B2); free(B1); } TEST(wcsncmp, testTwosComplementBane) { wchar_t *B1 = malloc(4); wchar_t *B2 = malloc(4); EXPECT_EQ(wcsncmp(memcpy(B1, "\x00\x00\x00\x80", 4), memcpy(B2, "\x00\x00\x00\x80", 4), 1), 0); EXPECT_EQ(wcsncmp(memcpy(B1, "\xff\xff\xff\x7f", 4), memcpy(B2, "\x00\x00\x00\x80", 4), 1), -1); EXPECT_EQ(wcsncmp(memcpy(B1, "\x00\x00\x00\x80", 4), memcpy(B2, "\xff\xff\xff\x7f", 4), 1), 1); free(B2); free(B1); } /*───────────────────────────────────────────────────────────────────────────│─╗ │ test/libc/str/strcmp_test.c § benchmarks ─╬─│┼ ╚────────────────────────────────────────────────────────────────────────────│*/ dontinline int strcmp_pure(const char *a, const char *b) { for (; *a == *b; a++, b++) { if (!*a) break; } return (*a & 0xff) - (*b & 0xff); } dontinline int strcasecmp_pure(const char *a, const char *b) { for (; *a && *b; a++, b++) { if (!(*a == *b || tolower(*a & 0xff) == tolower(*b & 0xff))) { break; } } return tolower(*a & 0xff) - tolower(*b & 0xff); } char *randomize_buf2str(size_t size, char data[size]) { rngset(data, size, rand64, -1); data[size - 1] = '\0'; return data; } char *longstringislong(size_t size, char data[size]) { unsigned i; randomize_buf2str(size, data); for (i = 0; i < size; ++i) { data[i] |= 1u << (i & 5); } data[size - 1] = '\0'; return data; } void randomize_buf2str_dupe(size_t size, char data[size], char dupe[size]) { randomize_buf2str(size, data); memcpy(dupe, data, size); } void longstringislong_dupe(size_t size, char data[size], char dupe[size]) { longstringislong(size, data); memcpy(dupe, data, size); } BENCH(bench_00_strcmp, bench) { size_t size; char *dupe, *data; size = 14139; data = gc(malloc(size)); dupe = gc(malloc(size)); EZBENCH2("strcmp [identity]", longstringislong(size, data), EXPROPRIATE(strcmp(VEIL("r", data), data))); EZBENCH2("strcmp [2 diff]", donothing, EXPROPRIATE(strcmp(VEIL("r", "hi"), VEIL("r", "there")))); EZBENCH2("strcmp_pure [2 diff]", donothing, EXPROPRIATE(strcmp_pure(VEIL("r", "hi"), VEIL("r", "there")))); EZBENCH2("strcmp [2 dupe]", randomize_buf2str_dupe(2, data, dupe), EXPROPRIATE(strcmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp_pure [2 dupe]", randomize_buf2str_dupe(2, data, dupe), EXPROPRIATE(strcmp_pure(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp [4 dupe]", randomize_buf2str_dupe(4, data, dupe), EXPROPRIATE(strcmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp_pure [4 dupe]", randomize_buf2str_dupe(4, data, dupe), EXPROPRIATE(strcmp_pure(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp [8 dupe]", randomize_buf2str_dupe(8, data, dupe), EXPROPRIATE(strcmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp_pure [8 dupe]", randomize_buf2str_dupe(8, data, dupe), EXPROPRIATE(strcmp_pure(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp [sdupe]", randomize_buf2str_dupe(size, data, dupe), EXPROPRIATE(strcmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp_pure [sdupe]", randomize_buf2str_dupe(size, data, dupe), EXPROPRIATE(strcmp_pure(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp [ldupe]", longstringislong_dupe(size, data, dupe), EXPROPRIATE(strcmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcmp_pure [ldupe]", longstringislong_dupe(size, data, dupe), EXPROPRIATE(strcmp_pure(VEIL("r", data), VEIL("r", dupe)))); } BENCH(bench_01_strcasecmp, bench) { size_t size; char *dupe, *data; size = 141393; data = gc(malloc(size)); dupe = gc(malloc(size)); EZBENCH2("strcasecmp [identity]", longstringislong(size, data), EXPROPRIATE(strcasecmp(VEIL("r", data), data))); EZBENCH2("strcasecmp [sdupe]", randomize_buf2str_dupe(size, data, dupe), EXPROPRIATE(strcasecmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcasecmp_pure [sdupe]", randomize_buf2str_dupe(size, data, dupe), EXPROPRIATE(strcasecmp_pure(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcasecmp [ldupe]", longstringislong_dupe(size, data, dupe), EXPROPRIATE(strcasecmp(VEIL("r", data), VEIL("r", dupe)))); EZBENCH2("strcasecmp_pure [ldupe]", longstringislong_dupe(size, data, dupe), EXPROPRIATE(strcasecmp_pure(VEIL("r", data), VEIL("r", dupe)))); } BENCH(memcmp, bench) { volatile char *copy = gc(strdup(kHyperion)); EZBENCH2("memcmp big", donothing, EXPROPRIATE(memcmp(kHyperion, copy, kHyperionSize))); copy = gc(strdup("tough little ship")); EZBENCH2("memcmp 18", donothing, EXPROPRIATE(memcmp("tough little ship", copy, 18))); }