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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/memory/fifo_buffer.h"
#include <string.h>
#include <cstdint>
#include "api/array_view.h"
#include "rtc_base/stream.h"
#include "rtc_base/thread.h"
#include "test/gtest.h"
namespace webrtc {
TEST(FifoBufferTest, TestAll) {
AutoThread main_thread;
const size_t kSize = 16;
const uint8_t in[kSize * 2 + 1] = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
uint8_t out[kSize * 2];
void* p;
const void* q;
size_t bytes;
FifoBuffer buf(kSize);
// Test assumptions about base state
EXPECT_EQ(SS_OPEN, buf.GetState());
int error;
EXPECT_EQ(SR_BLOCK, buf.Read(MakeArrayView(out, kSize), bytes, error));
EXPECT_TRUE(nullptr != buf.GetWriteBuffer(&bytes));
EXPECT_EQ(kSize, bytes);
buf.ConsumeWriteBuffer(0);
// Try a full write
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize), bytes, error));
EXPECT_EQ(kSize, bytes);
// Try a write that should block
EXPECT_EQ(SR_BLOCK, buf.Write(MakeArrayView(in, kSize), bytes, error));
// Try a full read
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize), bytes, error));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Try a read that should block
EXPECT_EQ(SR_BLOCK, buf.Read(MakeArrayView(out, kSize), bytes, error));
// Try a too-big write
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize * 2), bytes, error));
EXPECT_EQ(bytes, kSize);
// Try a too-big read
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize * 2), bytes, error));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Try some small writes and reads
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
// Try wraparound reads and writes in the following pattern
// WWWWWWWWWWWW.... 0123456789AB....
// RRRRRRRRXXXX.... ........89AB....
// WWWW....XXXXWWWW 4567....89AB0123
// XXXX....RRRRXXXX 4567........0123
// XXXXWWWWWWWWXXXX 4567012345670123
// RRRRXXXXXXXXRRRR ....01234567....
// ....RRRRRRRR.... ................
EXPECT_EQ(SR_SUCCESS,
buf.Write(MakeArrayView(in, kSize * 3 / 4), bytes, error));
EXPECT_EQ(kSize * 3 / 4, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 4), bytes, error));
EXPECT_EQ(kSize / 4, bytes);
EXPECT_EQ(0, memcmp(in + kSize / 2, out, kSize / 4));
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
// Use GetWriteBuffer to reset the read_position for the next tests
buf.GetWriteBuffer(&bytes);
buf.ConsumeWriteBuffer(0);
// Try using GetReadData to do a full read
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize), bytes, error));
q = buf.GetReadData(&bytes);
EXPECT_TRUE(nullptr != q);
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(q, in, kSize));
buf.ConsumeReadData(kSize);
EXPECT_EQ(SR_BLOCK, buf.Read(MakeArrayView(out, kSize), bytes, error));
// Try using GetReadData to do some small reads
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize), bytes, error));
q = buf.GetReadData(&bytes);
EXPECT_TRUE(nullptr != q);
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(q, in, kSize / 2));
buf.ConsumeReadData(kSize / 2);
q = buf.GetReadData(&bytes);
EXPECT_TRUE(nullptr != q);
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(q, in + kSize / 2, kSize / 2));
buf.ConsumeReadData(kSize / 2);
EXPECT_EQ(SR_BLOCK, buf.Read(MakeArrayView(out, kSize), bytes, error));
// Try using GetReadData in a wraparound case
// WWWWWWWWWWWWWWWW 0123456789ABCDEF
// RRRRRRRRRRRRXXXX ............CDEF
// WWWWWWWW....XXXX 01234567....CDEF
// ............RRRR 01234567........
// RRRRRRRR........ ................
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize), bytes, error));
EXPECT_EQ(SR_SUCCESS,
buf.Read(MakeArrayView(out, kSize * 3 / 4), bytes, error));
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
q = buf.GetReadData(&bytes);
EXPECT_TRUE(nullptr != q);
EXPECT_EQ(kSize / 4, bytes);
EXPECT_EQ(0, memcmp(q, in + kSize * 3 / 4, kSize / 4));
buf.ConsumeReadData(kSize / 4);
q = buf.GetReadData(&bytes);
EXPECT_TRUE(nullptr != q);
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(q, in, kSize / 2));
buf.ConsumeReadData(kSize / 2);
// Use GetWriteBuffer to reset the read_position for the next tests
buf.GetWriteBuffer(&bytes);
buf.ConsumeWriteBuffer(0);
// Try using GetWriteBuffer to do a full write
p = buf.GetWriteBuffer(&bytes);
EXPECT_TRUE(nullptr != p);
EXPECT_EQ(kSize, bytes);
memcpy(p, in, kSize);
buf.ConsumeWriteBuffer(kSize);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize), bytes, error));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Try using GetWriteBuffer to do some small writes
p = buf.GetWriteBuffer(&bytes);
EXPECT_TRUE(nullptr != p);
EXPECT_EQ(kSize, bytes);
memcpy(p, in, kSize / 2);
buf.ConsumeWriteBuffer(kSize / 2);
p = buf.GetWriteBuffer(&bytes);
EXPECT_TRUE(nullptr != p);
EXPECT_EQ(kSize / 2, bytes);
memcpy(p, in + kSize / 2, kSize / 2);
buf.ConsumeWriteBuffer(kSize / 2);
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize), bytes, error));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Try using GetWriteBuffer in a wraparound case
// WWWWWWWWWWWW.... 0123456789AB....
// RRRRRRRRXXXX.... ........89AB....
// ........XXXXWWWW ........89AB0123
// WWWW....XXXXXXXX 4567....89AB0123
// RRRR....RRRRRRRR ................
EXPECT_EQ(SR_SUCCESS,
buf.Write(MakeArrayView(in, kSize * 3 / 4), bytes, error));
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
p = buf.GetWriteBuffer(&bytes);
EXPECT_TRUE(nullptr != p);
EXPECT_EQ(kSize / 4, bytes);
memcpy(p, in, kSize / 4);
buf.ConsumeWriteBuffer(kSize / 4);
p = buf.GetWriteBuffer(&bytes);
EXPECT_TRUE(nullptr != p);
EXPECT_EQ(kSize / 2, bytes);
memcpy(p, in + kSize / 4, kSize / 4);
buf.ConsumeWriteBuffer(kSize / 4);
EXPECT_EQ(SR_SUCCESS,
buf.Read(MakeArrayView(out, kSize * 3 / 4), bytes, error));
EXPECT_EQ(kSize * 3 / 4, bytes);
EXPECT_EQ(0, memcmp(in + kSize / 2, out, kSize / 4));
EXPECT_EQ(0, memcmp(in, out + kSize / 4, kSize / 4));
// Check that the stream is now empty
EXPECT_EQ(SR_BLOCK, buf.Read(MakeArrayView(out, kSize), bytes, error));
// Write to the stream, close it, read the remaining bytes
EXPECT_EQ(SR_SUCCESS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
buf.Close();
EXPECT_EQ(SS_CLOSED, buf.GetState());
EXPECT_EQ(SR_EOS, buf.Write(MakeArrayView(in, kSize / 2), bytes, error));
EXPECT_EQ(SR_SUCCESS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_EOS, buf.Read(MakeArrayView(out, kSize / 2), bytes, error));
}
TEST(FifoBufferTest, FullBufferCheck) {
AutoThread main_thread;
FifoBuffer buff(10);
buff.ConsumeWriteBuffer(10);
size_t free;
EXPECT_TRUE(buff.GetWriteBuffer(&free) != nullptr);
EXPECT_EQ(0U, free);
}
} // namespace webrtc
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