ui/base/resource: Roll our own version of ReadBigEndian() function.

net/base/big_endian_unittest.cc

-// Copyright (c) 2011 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 "base/strings/string_piece.h"
-#include "net/base/big_endian.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace net {
-
-TEST(BigEndianReaderTest, ReadsValues) {
-  char data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC };
-  char buf[2];
-  uint8 u8;
-  uint16 u16;
-  uint32 u32;
-  base::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);
-  base::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 u8;
-  uint16 u16;
-  uint32 u32;
-  base::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 u8 = 0;
-  uint16 u16 = 0;
-  uint32 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 net
-