| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "HidUtils.h" |
| #include <gtest/gtest.h> |
| |
| using HidUtil::copyBits; |
| |
| TEST(CopyBitsTest, CopyBits) { |
| const struct { |
| uint32_t src; |
| uint32_t dst; |
| int src_bit_offset; |
| int dst_bit_offset; |
| int bit_count; |
| uint32_t expected_dst; |
| } kTestVectorList[] = { |
| { 0x00000005, 0x00000000, 0, 0, 8, 0x00000005 }, |
| { 0x00000005, 0x00000000, 0, 4, 8, 0x00000050 }, |
| { 0x0000000C, 0x00000020, 0, 4, 8, 0x000000C0 }, |
| { 0x00000005, 0x0000F02F, 0, 4, 8, 0x0000F05F }, |
| { 0x12345678, 0x87654321, 5, 11, 17, 0x8D159B21 }, |
| { 0x12345678, 0x87654321, 11, 5, 17, 0x8748D141 }, |
| }; |
| |
| for (auto test_vector : kTestVectorList) { |
| uint32_t dst = test_vector.dst; |
| copyBits(&(test_vector.src), &dst, sizeof(dst), |
| test_vector.src_bit_offset, test_vector.dst_bit_offset, |
| test_vector.bit_count); |
| EXPECT_EQ(test_vector.expected_dst, dst); |
| } |
| } |
| |
| TEST(CopyBitsTest, Overflow) { |
| const struct { |
| uint32_t src; |
| uint32_t dst; |
| unsigned int src_bit_offset; |
| unsigned int dst_bit_offset; |
| unsigned int bit_count; |
| uint32_t expected_dst; |
| } kTestVectorList[] = { |
| { 0x000000FF, 0x00000000, 0, 0, 8, 0x000000FF }, |
| { 0x000000FF, 0x00000000, 0, 24, 8, 0xFF000000 }, |
| { 0x000000FF, 0x00000000, 0, 25, 8, 0x00000000 }, |
| { 0x000000FF, 0x00000000, 0, 32, 8, 0x00000000 }, |
| { 0x000000FF, 0x00000000, 0, UINT_MAX, 8, 0x00000000 }, |
| { 0x000000FF, 0x00000000, 0, 8, UINT_MAX, 0x00000000 }, |
| }; |
| |
| for (auto test_vector : kTestVectorList) { |
| uint32_t dst = test_vector.dst; |
| copyBits(&(test_vector.src), &dst, sizeof(dst), |
| test_vector.src_bit_offset, test_vector.dst_bit_offset, |
| test_vector.bit_count); |
| EXPECT_EQ(test_vector.expected_dst, dst); |
| } |
| } |
| |