| // Copyright 2019 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/fxcrt/byteorder.h" |
| |
| #include "core/fxcrt/fx_system.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace { |
| |
| constexpr uint32_t kTestValues32[] = { |
| 0x0, 0x1, 0x2, 0x3, 0x4, 0xfe, |
| 0xff, 0x100, 0x101, 0xffff, 0x10000, 0x123456, |
| 0x345167, 0x2f3e4a5b, 0xff000000, 0xfffffffe, 0xffffffff}; |
| |
| } // namespace |
| |
| namespace fxcrt { |
| |
| TEST(ByteOrder, ByteSwapToLE16) { |
| // Since there are so few values, test them all. |
| for (uint32_t v = 0; v < 0x10000; ++v) { |
| const uint16_t v16 = v; |
| uint16_t expected = |
| FXSYS_UINT16_GET_LSBFIRST(reinterpret_cast<const uint8_t*>(&v16)); |
| EXPECT_EQ(expected, ByteSwapToLE16(v16)) << v; |
| |
| // Check safety against unexpectedly signed bytes. |
| expected = FXSYS_UINT16_GET_LSBFIRST(reinterpret_cast<const int8_t*>(&v16)); |
| EXPECT_EQ(expected, ByteSwapToLE16(v16)) << v; |
| } |
| } |
| |
| TEST(ByteOrder, ByteSwapToLE32) { |
| for (uint32_t v : kTestValues32) { |
| uint32_t expected = |
| FXSYS_UINT32_GET_LSBFIRST(reinterpret_cast<const uint8_t*>(&v)); |
| EXPECT_EQ(expected, ByteSwapToLE32(v)) << v; |
| |
| // Check safety against unexpectedly signed bytes. |
| expected = FXSYS_UINT32_GET_LSBFIRST(reinterpret_cast<const int8_t*>(&v)); |
| EXPECT_EQ(expected, ByteSwapToLE32(v)) << v; |
| } |
| } |
| |
| TEST(ByteOrder, ByteSwapToBE16) { |
| // Since there are so few values, test them all. |
| for (uint32_t v = 0; v < 0x10000; ++v) { |
| const uint16_t v16 = v; |
| uint16_t expected = |
| FXSYS_UINT16_GET_MSBFIRST(reinterpret_cast<const uint8_t*>(&v16)); |
| EXPECT_EQ(expected, ByteSwapToBE16(v16)) << v; |
| |
| // Check safety against unexpectedly signed bytes. |
| expected = FXSYS_UINT16_GET_MSBFIRST(reinterpret_cast<const int8_t*>(&v16)); |
| EXPECT_EQ(expected, ByteSwapToBE16(v16)) << v; |
| } |
| } |
| |
| TEST(ByteOrder, ByteSwapToBE32) { |
| for (uint32_t v : kTestValues32) { |
| uint32_t expected = |
| FXSYS_UINT32_GET_MSBFIRST(reinterpret_cast<const uint8_t*>(&v)); |
| EXPECT_EQ(expected, ByteSwapToBE32(v)) << v; |
| |
| // Check safety against unexpectedly signed bytes. |
| expected = FXSYS_UINT32_GET_MSBFIRST(reinterpret_cast<const int8_t*>(&v)); |
| EXPECT_EQ(expected, ByteSwapToBE32(v)) << v; |
| } |
| } |
| |
| } // namespace fxcrt |