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- // Copyright 2014 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "butil/big_endian.h"
- #include "butil/strings/string_piece.h"
- #include <gtest/gtest.h>
- namespace butil {
- TEST(BigEndianReaderTest, ReadsValues) {
- char data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC };
- char buf[2];
- uint8_t u8;
- uint16_t u16;
- uint32_t u32;
- butil::StringPiece piece;
- BigEndianReader reader(data, sizeof(data));
- EXPECT_TRUE(reader.Skip(2));
- EXPECT_EQ(data + 2, reader.ptr());
- EXPECT_EQ(reader.remaining(), static_cast<int>(sizeof(data)) - 2);
- EXPECT_TRUE(reader.ReadBytes(buf, sizeof(buf)));
- EXPECT_EQ(0x2, buf[0]);
- EXPECT_EQ(0x3, buf[1]);
- EXPECT_TRUE(reader.ReadU8(&u8));
- EXPECT_EQ(0x4, u8);
- EXPECT_TRUE(reader.ReadU16(&u16));
- EXPECT_EQ(0x0506, u16);
- EXPECT_TRUE(reader.ReadU32(&u32));
- EXPECT_EQ(0x0708090Au, u32);
- butil::StringPiece expected(reader.ptr(), 2);
- EXPECT_TRUE(reader.ReadPiece(&piece, 2));
- EXPECT_EQ(2u, piece.size());
- EXPECT_EQ(expected.data(), piece.data());
- }
- TEST(BigEndianReaderTest, RespectsLength) {
- char data[4];
- char buf[2];
- uint8_t u8;
- uint16_t u16;
- uint32_t u32;
- butil::StringPiece piece;
- BigEndianReader reader(data, sizeof(data));
- // 4 left
- EXPECT_FALSE(reader.Skip(6));
- EXPECT_TRUE(reader.Skip(1));
- // 3 left
- EXPECT_FALSE(reader.ReadU32(&u32));
- EXPECT_FALSE(reader.ReadPiece(&piece, 4));
- EXPECT_TRUE(reader.Skip(2));
- // 1 left
- EXPECT_FALSE(reader.ReadU16(&u16));
- EXPECT_FALSE(reader.ReadBytes(buf, 2));
- EXPECT_TRUE(reader.Skip(1));
- // 0 left
- EXPECT_FALSE(reader.ReadU8(&u8));
- EXPECT_EQ(0, reader.remaining());
- }
- TEST(BigEndianWriterTest, WritesValues) {
- char expected[] = { 0, 0, 2, 3, 4, 5, 6, 7, 8, 9, 0xA };
- char data[sizeof(expected)];
- char buf[] = { 0x2, 0x3 };
- memset(data, 0, sizeof(data));
- BigEndianWriter writer(data, sizeof(data));
- EXPECT_TRUE(writer.Skip(2));
- EXPECT_TRUE(writer.WriteBytes(buf, sizeof(buf)));
- EXPECT_TRUE(writer.WriteU8(0x4));
- EXPECT_TRUE(writer.WriteU16(0x0506));
- EXPECT_TRUE(writer.WriteU32(0x0708090A));
- EXPECT_EQ(0, memcmp(expected, data, sizeof(expected)));
- }
- TEST(BigEndianWriterTest, RespectsLength) {
- char data[4];
- char buf[2];
- uint8_t u8 = 0;
- uint16_t u16 = 0;
- uint32_t u32 = 0;
- BigEndianWriter writer(data, sizeof(data));
- // 4 left
- EXPECT_FALSE(writer.Skip(6));
- EXPECT_TRUE(writer.Skip(1));
- // 3 left
- EXPECT_FALSE(writer.WriteU32(u32));
- EXPECT_TRUE(writer.Skip(2));
- // 1 left
- EXPECT_FALSE(writer.WriteU16(u16));
- EXPECT_FALSE(writer.WriteBytes(buf, 2));
- EXPECT_TRUE(writer.Skip(1));
- // 0 left
- EXPECT_FALSE(writer.WriteU8(u8));
- EXPECT_EQ(0, writer.remaining());
- }
- } // namespace butil
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