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// 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