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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
151 lines
4.3 KiB
C++
151 lines
4.3 KiB
C++
//===- BitstreamReaderTest.cpp - Tests for BitstreamReader ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Bitcode/BitstreamReader.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Bitcode/BitstreamWriter.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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TEST(BitstreamReaderTest, AtEndOfStream) {
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uint8_t Bytes[4] = {
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0x00, 0x01, 0x02, 0x03
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};
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BitstreamCursor Cursor(Bytes);
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EXPECT_FALSE(Cursor.AtEndOfStream());
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(void)Cursor.Read(8);
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EXPECT_FALSE(Cursor.AtEndOfStream());
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(void)Cursor.Read(24);
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EXPECT_TRUE(Cursor.AtEndOfStream());
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Cursor.JumpToBit(0);
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EXPECT_FALSE(Cursor.AtEndOfStream());
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Cursor.JumpToBit(32);
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EXPECT_TRUE(Cursor.AtEndOfStream());
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}
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TEST(BitstreamReaderTest, AtEndOfStreamJump) {
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uint8_t Bytes[4] = {
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0x00, 0x01, 0x02, 0x03
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};
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BitstreamCursor Cursor(Bytes);
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Cursor.JumpToBit(32);
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EXPECT_TRUE(Cursor.AtEndOfStream());
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}
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TEST(BitstreamReaderTest, AtEndOfStreamEmpty) {
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BitstreamCursor Cursor(ArrayRef<uint8_t>{});
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EXPECT_TRUE(Cursor.AtEndOfStream());
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}
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TEST(BitstreamReaderTest, getCurrentByteNo) {
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uint8_t Bytes[] = {0x00, 0x01, 0x02, 0x03};
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SimpleBitstreamCursor Cursor(Bytes);
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for (unsigned I = 0, E = 32; I != E; ++I) {
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EXPECT_EQ(I / 8, Cursor.getCurrentByteNo());
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(void)Cursor.Read(1);
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}
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EXPECT_EQ(4u, Cursor.getCurrentByteNo());
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}
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TEST(BitstreamReaderTest, getPointerToByte) {
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uint8_t Bytes[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
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SimpleBitstreamCursor Cursor(Bytes);
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for (unsigned I = 0, E = 8; I != E; ++I) {
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EXPECT_EQ(Bytes + I, Cursor.getPointerToByte(I, 1));
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}
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}
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TEST(BitstreamReaderTest, getPointerToBit) {
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uint8_t Bytes[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
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SimpleBitstreamCursor Cursor(Bytes);
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for (unsigned I = 0, E = 8; I != E; ++I) {
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EXPECT_EQ(Bytes + I, Cursor.getPointerToBit(I * 8, 1));
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}
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}
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TEST(BitstreamReaderTest, readRecordWithBlobWhileStreaming) {
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SmallVector<uint8_t, 1> BlobData;
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for (unsigned I = 0, E = 1024; I != E; ++I)
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BlobData.push_back(I);
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// Try a bunch of different sizes.
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const unsigned Magic = 0x12345678;
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const unsigned BlockID = bitc::FIRST_APPLICATION_BLOCKID;
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const unsigned RecordID = 1;
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for (unsigned I = 0, BlobSize = 0, E = BlobData.size(); BlobSize < E;
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BlobSize += ++I) {
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StringRef BlobIn((const char *)BlobData.begin(), BlobSize);
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// Write the bitcode.
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SmallVector<char, 1> Buffer;
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unsigned AbbrevID;
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{
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BitstreamWriter Stream(Buffer);
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Stream.Emit(Magic, 32);
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Stream.EnterSubblock(BlockID, 3);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RecordID));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
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AbbrevID = Stream.EmitAbbrev(std::move(Abbrev));
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unsigned Record[] = {RecordID};
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Stream.EmitRecordWithBlob(AbbrevID, makeArrayRef(Record), BlobIn);
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Stream.ExitBlock();
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}
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// Stream the buffer into the reader.
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BitstreamCursor Stream(
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ArrayRef<uint8_t>((const uint8_t *)Buffer.begin(), Buffer.size()));
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// Header. Included in test so that we can run llvm-bcanalyzer to debug
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// when there are problems.
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ASSERT_EQ(Magic, Stream.Read(32));
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// Block.
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BitstreamEntry Entry =
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Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
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ASSERT_EQ(BitstreamEntry::SubBlock, Entry.Kind);
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ASSERT_EQ(BlockID, Entry.ID);
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ASSERT_FALSE(Stream.EnterSubBlock(BlockID));
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// Abbreviation.
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Entry = Stream.advance();
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ASSERT_EQ(BitstreamEntry::Record, Entry.Kind);
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ASSERT_EQ(AbbrevID, Entry.ID);
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// Record.
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StringRef BlobOut;
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SmallVector<uint64_t, 1> Record;
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ASSERT_EQ(RecordID, Stream.readRecord(Entry.ID, Record, &BlobOut));
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EXPECT_TRUE(Record.empty());
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EXPECT_EQ(BlobIn, BlobOut);
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}
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}
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TEST(BitstreamReaderTest, shortRead) {
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uint8_t Bytes[] = {8, 7, 6, 5, 4, 3, 2, 1};
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for (unsigned I = 1; I != 8; ++I) {
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SimpleBitstreamCursor Cursor(ArrayRef<uint8_t>(Bytes, I));
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EXPECT_EQ(8ull, Cursor.Read(8));
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}
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}
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} // end anonymous namespace
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