117 lines
4.8 KiB
C
117 lines
4.8 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/alg/alg.h"
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#include "libc/bits/bits.h"
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#include "libc/str/internal.h"
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#include "libc/str/str.h"
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#include "libc/testlib/testlib.h"
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void *(*memmemi)(const void *, size_t, const void *, size_t) = memmem;
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FIXTURE(memmem, tiny) {
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memmemi = tinymemmem;
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}
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#define MakeMemory(SL) memcpy(tmalloc(sizeof(SL) - 1), SL, sizeof(SL) - 1)
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TEST(memmem, test) {
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char *needle = MakeMemory("abcdefgh");
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char *haystk = MakeMemory("acccccccbbbbbbbbabcdefghdddddddd");
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EXPECT_BINEQ(u"abcdefghdddddddd", memmemi(haystk, 32, needle, 8));
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memcpy(needle, "aaaaaaaa", 8);
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memcpy(haystk, "acccccccbbbbbbbbaaaaaaaadddddddd", 32);
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EXPECT_BINEQ(u"aaaaaaaadddddddd", memmemi(haystk, 32, needle, 8));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testNoMatch) {
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char *needle = MakeMemory("abcdefzh");
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char *haystk = MakeMemory("acccccccbbbbbbbbabcdefghdddddddd");
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EXPECT_EQ(NULL, memmemi(haystk, 32, needle, 8));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testStartOfMemory) {
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char *needle = MakeMemory("acccc");
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char *haystk = MakeMemory("acccccccbbbbbbbbabcdefghdddddddd");
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EXPECT_EQ(&haystk[0], memmemi(haystk, 32, needle, 5));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testEndOfMemory) {
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char *needle = MakeMemory("123");
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char *haystk = MakeMemory("abc123");
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EXPECT_EQ(&haystk[3], memmemi(haystk, 6, needle, 3));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testCrossesSseRegister) {
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char *needle = MakeMemory("eeeeeeeeeeeeefffffffffffff");
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char *haystk = MakeMemory("eeeeeeeeeeeeeeeeffffffffffffffffrrrrrrrrrrrrrrrr");
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EXPECT_EQ(&haystk[3], memmemi(haystk, 16 * 3, needle, 26));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testHasNulCharacters) {
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char *needle = MakeMemory("eeeeeeeeeeeee\0ffffffffffff");
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char *haystk =
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MakeMemory("eeeeeeeeeeeeeeee\0fffffffffffffffrrrrrrrrrrrrrrrr");
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EXPECT_EQ(&haystk[3], memmemi(haystk, 16 * 3, needle, 26));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testWeird) {
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char *needle = MakeMemory("-*-+-+-+-+-+-+-+");
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char *haystk = MakeMemory("-+-+-+-+-+-+-+-*-+-+-+-+-+-+-+-+");
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EXPECT_EQ(14, (intptr_t)memmemi(haystk, 32, needle, 16) - (intptr_t)haystk);
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testEmptyNeedle_matchesStartOfHaystack) {
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char *needle = tmalloc(0);
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char *haystk = MakeMemory("-+-+-+-+-+-+-+-*-+-+-+-+-+-+-+-+");
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EXPECT_EQ(0, (intptr_t)memmemi(haystk, 32, needle, 0) - (intptr_t)haystk);
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testEmptyHaystack_alwaysReturnsNull) {
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char *needle = MakeMemory("-*-+-+-+-+-+-+-+");
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char *haystk = tmalloc(0);
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EXPECT_EQ(NULL, memmemi(haystk, 0, needle, 16));
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EXPECT_EQ(NULL, memmemi(haystk, 0, needle, 1));
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tfree(haystk);
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tfree(needle);
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}
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TEST(memmem, testEmptyHaystackAndNeedle_returnsHaystack) {
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char *needle = tmalloc(0);
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char *haystk = tmalloc(0);
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EXPECT_EQ(haystk, memmemi(haystk, 0, needle, 0));
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tfree(haystk);
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tfree(needle);
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}
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