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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/stream.h"
#include <string.h>
#include "test/gtest.h"
namespace rtc {
///////////////////////////////////////////////////////////////////////////////
// TestStream
///////////////////////////////////////////////////////////////////////////////
class TestStream : public StreamInterface {
public:
TestStream() : pos_(0) {}
StreamState GetState() const override { return SS_OPEN; }
StreamResult Read(void* buffer,
size_t buffer_len,
size_t* read,
int* error) override {
unsigned char* uc_buffer = static_cast<unsigned char*>(buffer);
for (size_t i = 0; i < buffer_len; ++i) {
uc_buffer[i] = static_cast<unsigned char>(pos_++);
}
if (read)
*read = buffer_len;
return SR_SUCCESS;
}
StreamResult Write(const void* data,
size_t data_len,
size_t* written,
int* error) override {
if (error)
*error = -1;
return SR_ERROR;
}
void Close() override {}
private:
size_t pos_;
};
bool VerifyTestBuffer(unsigned char* buffer, size_t len, unsigned char value) {
bool passed = true;
for (size_t i = 0; i < len; ++i) {
if (buffer[i] != value++) {
passed = false;
break;
}
}
// Ensure that we don't pass again without re-writing
memset(buffer, 0, len);
return passed;
}
TEST(FifoBufferTest, TestAll) {
const size_t kSize = 16;
const char in[kSize * 2 + 1] = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
char 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());
EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
EXPECT_TRUE(nullptr != buf.GetWriteBuffer(&bytes));
EXPECT_EQ(kSize, bytes);
buf.ConsumeWriteBuffer(0);
// Try a full write
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
// Try a write that should block
EXPECT_EQ(SR_BLOCK, buf.Write(in, kSize, &bytes, nullptr));
// Try a full read
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Try a read that should block
EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
// Try a too-big write
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize * 2, &bytes, nullptr));
EXPECT_EQ(bytes, kSize);
// Try a too-big read
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 2, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Try some small writes and reads
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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(in, kSize * 3 / 4, &bytes, nullptr));
EXPECT_EQ(kSize * 3 / 4, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 4, &bytes, nullptr));
EXPECT_EQ(kSize / 4, bytes);
EXPECT_EQ(0, memcmp(in + kSize / 2, out, kSize / 4));
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
EXPECT_EQ(kSize / 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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(in, kSize, &bytes, nullptr));
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(out, kSize, &bytes, nullptr));
// Try using GetReadData to do some small reads
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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(out, kSize, &bytes, nullptr));
// Try using GetReadData in a wraparound case
// WWWWWWWWWWWWWWWW 0123456789ABCDEF
// RRRRRRRRRRRRXXXX ............CDEF
// WWWWWWWW....XXXX 01234567....CDEF
// ............RRRR 01234567........
// RRRRRRRR........ ................
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 3 / 4, &bytes, nullptr));
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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(out, kSize, &bytes, nullptr));
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(out, kSize, &bytes, nullptr));
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(in, kSize * 3 / 4, &bytes, nullptr));
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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(out, kSize * 3 / 4, &bytes, nullptr));
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(out, kSize, &bytes, nullptr));
// Try growing the buffer
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
EXPECT_TRUE(buf.SetCapacity(kSize * 2));
EXPECT_EQ(SR_SUCCESS, buf.Write(in + kSize, kSize, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 2, &bytes, nullptr));
EXPECT_EQ(kSize * 2, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize * 2));
// Try shrinking the buffer
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
EXPECT_TRUE(buf.SetCapacity(kSize));
EXPECT_EQ(SR_BLOCK, buf.Write(in, kSize, &bytes, nullptr));
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize, &bytes, nullptr));
EXPECT_EQ(kSize, bytes);
EXPECT_EQ(0, memcmp(in, out, kSize));
// Write to the stream, close it, read the remaining bytes
EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
buf.Close();
EXPECT_EQ(SS_CLOSED, buf.GetState());
EXPECT_EQ(SR_EOS, buf.Write(in, kSize / 2, &bytes, nullptr));
EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
EXPECT_EQ(0, memcmp(in, out, kSize / 2));
EXPECT_EQ(SR_EOS, buf.Read(out, kSize / 2, &bytes, nullptr));
}
TEST(FifoBufferTest, FullBufferCheck) {
FifoBuffer buff(10);
buff.ConsumeWriteBuffer(10);
size_t free;
EXPECT_TRUE(buff.GetWriteBuffer(&free) != nullptr);
EXPECT_EQ(0U, free);
}
TEST(FifoBufferTest, WriteOffsetAndReadOffset) {
const size_t kSize = 16;
const char in[kSize * 2 + 1] = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
char out[kSize * 2];
FifoBuffer buf(kSize);
// Write 14 bytes.
EXPECT_EQ(SR_SUCCESS, buf.Write(in, 14, nullptr, nullptr));
// Make sure data is in |buf|.
size_t buffered;
EXPECT_TRUE(buf.GetBuffered(&buffered));
EXPECT_EQ(14u, buffered);
// Read 10 bytes.
buf.ConsumeReadData(10);
// There should be now 12 bytes of available space.
size_t remaining;
EXPECT_TRUE(buf.GetWriteRemaining(&remaining));
EXPECT_EQ(12u, remaining);
// Write at offset 12, this should fail.
EXPECT_EQ(SR_BLOCK, buf.WriteOffset(in, 10, 12, nullptr));
// Write 8 bytes at offset 4, this wraps around the buffer.
EXPECT_EQ(SR_SUCCESS, buf.WriteOffset(in, 8, 4, nullptr));
// Number of available space remains the same until we call
// ConsumeWriteBuffer().
EXPECT_TRUE(buf.GetWriteRemaining(&remaining));
EXPECT_EQ(12u, remaining);
buf.ConsumeWriteBuffer(12);
// There's 4 bytes bypassed and 4 bytes no read so skip them and verify the
// 8 bytes written.
size_t read;
EXPECT_EQ(SR_SUCCESS, buf.ReadOffset(out, 8, 8, &read));
EXPECT_EQ(8u, read);
EXPECT_EQ(0, memcmp(out, in, 8));
// There should still be 16 bytes available for reading.
EXPECT_TRUE(buf.GetBuffered(&buffered));
EXPECT_EQ(16u, buffered);
// Read at offset 16, this should fail since we don't have that much data.
EXPECT_EQ(SR_BLOCK, buf.ReadOffset(out, 10, 16, nullptr));
}
} // namespace rtc