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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/byte_buffer.h"
#include <string.h>
#include "rtc_base/arraysize.h"
#include "rtc_base/byte_order.h"
#include "test/gtest.h"
namespace rtc {
TEST(ByteBufferTest, TestByteOrder) {
uint16_t n16 = 1;
uint32_t n32 = 1;
uint64_t n64 = 1;
EXPECT_EQ(n16, NetworkToHost16(HostToNetwork16(n16)));
EXPECT_EQ(n32, NetworkToHost32(HostToNetwork32(n32)));
EXPECT_EQ(n64, NetworkToHost64(HostToNetwork64(n64)));
if (IsHostBigEndian()) {
// The host is the network (big) endian.
EXPECT_EQ(n16, HostToNetwork16(n16));
EXPECT_EQ(n32, HostToNetwork32(n32));
EXPECT_EQ(n64, HostToNetwork64(n64));
// GetBE converts big endian to little endian here.
EXPECT_EQ(n16 >> 8, GetBE16(&n16));
EXPECT_EQ(n32 >> 24, GetBE32(&n32));
EXPECT_EQ(n64 >> 56, GetBE64(&n64));
} else {
// The host is little endian.
EXPECT_NE(n16, HostToNetwork16(n16));
EXPECT_NE(n32, HostToNetwork32(n32));
EXPECT_NE(n64, HostToNetwork64(n64));
// GetBE converts little endian to big endian here.
EXPECT_EQ(GetBE16(&n16), HostToNetwork16(n16));
EXPECT_EQ(GetBE32(&n32), HostToNetwork32(n32));
EXPECT_EQ(GetBE64(&n64), HostToNetwork64(n64));
// GetBE converts little endian to big endian here.
EXPECT_EQ(n16 << 8, GetBE16(&n16));
EXPECT_EQ(n32 << 24, GetBE32(&n32));
EXPECT_EQ(n64 << 56, GetBE64(&n64));
}
}
TEST(ByteBufferTest, TestBufferLength) {
ByteBufferWriter buffer;
size_t size = 0;
EXPECT_EQ(size, buffer.Length());
buffer.WriteUInt8(1);
++size;
EXPECT_EQ(size, buffer.Length());
buffer.WriteUInt16(1);
size += 2;
EXPECT_EQ(size, buffer.Length());
buffer.WriteUInt24(1);
size += 3;
EXPECT_EQ(size, buffer.Length());
buffer.WriteUInt32(1);
size += 4;
EXPECT_EQ(size, buffer.Length());
buffer.WriteUInt64(1);
size += 8;
EXPECT_EQ(size, buffer.Length());
}
TEST(ByteBufferTest, TestReadWriteBuffer) {
ByteBufferWriter buffer;
ByteBufferReader read_buf(nullptr, 0);
uint8_t ru8;
EXPECT_FALSE(read_buf.ReadUInt8(&ru8));
// Write and read uint8_t.
uint8_t wu8 = 1;
buffer.WriteUInt8(wu8);
ByteBufferReader read_buf1(buffer.Data(), buffer.Length());
EXPECT_TRUE(read_buf1.ReadUInt8(&ru8));
EXPECT_EQ(wu8, ru8);
EXPECT_EQ(0U, read_buf1.Length());
buffer.Clear();
// Write and read uint16_t.
uint16_t wu16 = (1 << 8) + 1;
buffer.WriteUInt16(wu16);
ByteBufferReader read_buf2(buffer.Data(), buffer.Length());
uint16_t ru16;
EXPECT_TRUE(read_buf2.ReadUInt16(&ru16));
EXPECT_EQ(wu16, ru16);
EXPECT_EQ(0U, read_buf2.Length());
buffer.Clear();
// Write and read uint24.
uint32_t wu24 = (3 << 16) + (2 << 8) + 1;
buffer.WriteUInt24(wu24);
ByteBufferReader read_buf3(buffer.Data(), buffer.Length());
uint32_t ru24;
EXPECT_TRUE(read_buf3.ReadUInt24(&ru24));
EXPECT_EQ(wu24, ru24);
EXPECT_EQ(0U, read_buf3.Length());
buffer.Clear();
// Write and read uint32_t.
uint32_t wu32 = (4 << 24) + (3 << 16) + (2 << 8) + 1;
buffer.WriteUInt32(wu32);
ByteBufferReader read_buf4(buffer.Data(), buffer.Length());
uint32_t ru32;
EXPECT_TRUE(read_buf4.ReadUInt32(&ru32));
EXPECT_EQ(wu32, ru32);
EXPECT_EQ(0U, read_buf3.Length());
buffer.Clear();
// Write and read uint64_t.
uint32_t another32 = (8 << 24) + (7 << 16) + (6 << 8) + 5;
uint64_t wu64 = (static_cast<uint64_t>(another32) << 32) + wu32;
buffer.WriteUInt64(wu64);
ByteBufferReader read_buf5(buffer.Data(), buffer.Length());
uint64_t ru64;
EXPECT_TRUE(read_buf5.ReadUInt64(&ru64));
EXPECT_EQ(wu64, ru64);
EXPECT_EQ(0U, read_buf5.Length());
buffer.Clear();
// Write and read string.
std::string write_string("hello");
buffer.WriteString(write_string);
ByteBufferReader read_buf6(buffer.Data(), buffer.Length());
std::string read_string;
EXPECT_TRUE(read_buf6.ReadString(&read_string, write_string.size()));
EXPECT_EQ(write_string, read_string);
EXPECT_EQ(0U, read_buf6.Length());
buffer.Clear();
// Write and read bytes
char write_bytes[] = "foo";
buffer.WriteBytes(write_bytes, 3);
ByteBufferReader read_buf7(buffer.Data(), buffer.Length());
char read_bytes[3];
EXPECT_TRUE(read_buf7.ReadBytes(read_bytes, 3));
for (int i = 0; i < 3; ++i) {
EXPECT_EQ(write_bytes[i], read_bytes[i]);
}
EXPECT_EQ(0U, read_buf7.Length());
buffer.Clear();
// Write and read reserved buffer space
char* write_dst = buffer.ReserveWriteBuffer(3);
memcpy(write_dst, write_bytes, 3);
ByteBufferReader read_buf8(buffer.Data(), buffer.Length());
memset(read_bytes, 0, 3);
EXPECT_TRUE(read_buf8.ReadBytes(read_bytes, 3));
for (int i = 0; i < 3; ++i) {
EXPECT_EQ(write_bytes[i], read_bytes[i]);
}
EXPECT_EQ(0U, read_buf8.Length());
buffer.Clear();
// Write and read in order.
buffer.WriteUInt8(wu8);
buffer.WriteUInt16(wu16);
buffer.WriteUInt24(wu24);
buffer.WriteUInt32(wu32);
buffer.WriteUInt64(wu64);
ByteBufferReader read_buf9(buffer.Data(), buffer.Length());
EXPECT_TRUE(read_buf9.ReadUInt8(&ru8));
EXPECT_EQ(wu8, ru8);
EXPECT_TRUE(read_buf9.ReadUInt16(&ru16));
EXPECT_EQ(wu16, ru16);
EXPECT_TRUE(read_buf9.ReadUInt24(&ru24));
EXPECT_EQ(wu24, ru24);
EXPECT_TRUE(read_buf9.ReadUInt32(&ru32));
EXPECT_EQ(wu32, ru32);
EXPECT_TRUE(read_buf9.ReadUInt64(&ru64));
EXPECT_EQ(wu64, ru64);
EXPECT_EQ(0U, read_buf9.Length());
buffer.Clear();
}
TEST(ByteBufferTest, TestReadWriteUVarint) {
ByteBufferWriter write_buffer;
size_t size = 0;
EXPECT_EQ(size, write_buffer.Length());
write_buffer.WriteUVarint(1u);
++size;
EXPECT_EQ(size, write_buffer.Length());
write_buffer.WriteUVarint(2u);
++size;
EXPECT_EQ(size, write_buffer.Length());
write_buffer.WriteUVarint(27u);
++size;
EXPECT_EQ(size, write_buffer.Length());
write_buffer.WriteUVarint(149u);
size += 2;
EXPECT_EQ(size, write_buffer.Length());
write_buffer.WriteUVarint(68719476736u);
size += 6;
EXPECT_EQ(size, write_buffer.Length());
ByteBufferReader read_buffer(write_buffer.Data(), write_buffer.Length());
EXPECT_EQ(size, read_buffer.Length());
uint64_t val1, val2, val3, val4, val5;
ASSERT_TRUE(read_buffer.ReadUVarint(&val1));
EXPECT_EQ(1u, val1);
--size;
EXPECT_EQ(size, read_buffer.Length());
ASSERT_TRUE(read_buffer.ReadUVarint(&val2));
EXPECT_EQ(2u, val2);
--size;
EXPECT_EQ(size, read_buffer.Length());
ASSERT_TRUE(read_buffer.ReadUVarint(&val3));
EXPECT_EQ(27u, val3);
--size;
EXPECT_EQ(size, read_buffer.Length());
ASSERT_TRUE(read_buffer.ReadUVarint(&val4));
EXPECT_EQ(149u, val4);
size -= 2;
EXPECT_EQ(size, read_buffer.Length());
ASSERT_TRUE(read_buffer.ReadUVarint(&val5));
EXPECT_EQ(68719476736u, val5);
size -= 6;
EXPECT_EQ(size, read_buffer.Length());
}
} // namespace rtc
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