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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/MemMem.h>
TEST_CASE(bitap)
{
Array<u8, 8> haystack { 1, 0, 1, 2, 3, 4, 5, 0 };
Array<u8, 4> needle_0 { 2, 3, 4, 5 };
Array<u8, 4> needle_1 { 1, 2, 3, 4 };
Array<u8, 4> needle_2 { 3, 4, 5, 0 };
Array<u8, 4> needle_3 { 3, 4, 5, 6 };
auto result_0 = AK::memmem(haystack.data(), haystack.size(), needle_0.data(), needle_0.size());
auto result_1 = AK::memmem(haystack.data(), haystack.size(), needle_1.data(), needle_1.size());
auto result_2 = AK::memmem(haystack.data(), haystack.size(), needle_2.data(), needle_2.size());
auto result_3 = AK::memmem(haystack.data(), haystack.size(), needle_3.data(), needle_3.size());
EXPECT_EQ(result_0, &haystack[3]);
EXPECT_EQ(result_1, &haystack[2]);
EXPECT_EQ(result_2, &haystack[4]);
EXPECT_EQ(result_3, nullptr);
}
TEST_CASE(kmp_one_chunk)
{
Array<u8, 8> haystack { 1, 0, 1, 2, 3, 4, 5, 0 };
Array<Array<u8, 8>, 1> haystack_arr { haystack };
Array<u8, 4> needle_0 { 2, 3, 4, 5 };
Array<u8, 4> needle_1 { 1, 2, 3, 4 };
Array<u8, 4> needle_2 { 3, 4, 5, 0 };
Array<u8, 4> needle_3 { 3, 4, 5, 6 };
auto result_0 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_0);
auto result_1 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_1);
auto result_2 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_2);
auto result_3 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_3);
EXPECT_EQ(result_0.value_or(9), 3u);
EXPECT_EQ(result_1.value_or(9), 2u);
EXPECT_EQ(result_2.value_or(9), 4u);
EXPECT(!result_3.has_value());
}
TEST_CASE(kmp_two_chunks)
{
Array<u8, 4> haystack_first_half { 1, 0, 1, 2 }, haystack_second_half { 3, 4, 5, 0 };
Array<Array<u8, 4>, 2> haystack { haystack_first_half, haystack_second_half };
Array<u8, 4> needle_0 { 2, 3, 4, 5 };
Array<u8, 4> needle_1 { 1, 2, 3, 4 };
Array<u8, 4> needle_2 { 3, 4, 5, 0 };
Array<u8, 4> needle_3 { 3, 4, 5, 6 };
auto result_0 = AK::memmem(haystack.begin(), haystack.end(), needle_0);
auto result_1 = AK::memmem(haystack.begin(), haystack.end(), needle_1);
auto result_2 = AK::memmem(haystack.begin(), haystack.end(), needle_2);
auto result_3 = AK::memmem(haystack.begin(), haystack.end(), needle_3);
EXPECT_EQ(result_0.value_or(9), 3u);
EXPECT_EQ(result_1.value_or(9), 2u);
EXPECT_EQ(result_2.value_or(9), 4u);
EXPECT(!result_3.has_value());
}
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