69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
//===- unittests/Support/StreamingMemoryObjectTest.cpp --------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/StreamingMemoryObject.h"
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#include "gtest/gtest.h"
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#include <string.h>
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using namespace llvm;
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namespace {
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class NullDataStreamer : public DataStreamer {
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size_t GetBytes(unsigned char *Buffer, size_t Length) override {
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memset(Buffer, 0, Length);
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return Length;
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}
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};
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class BufferStreamer : public DataStreamer {
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StringRef Buffer;
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public:
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BufferStreamer(StringRef Buffer) : Buffer(Buffer) {}
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size_t GetBytes(unsigned char *OutBuffer, size_t Length) override {
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if (Length >= Buffer.size())
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Length = Buffer.size();
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std::copy(Buffer.begin(), Buffer.begin() + Length, OutBuffer);
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Buffer = Buffer.drop_front(Length);
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return Length;
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}
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};
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TEST(StreamingMemoryObjectTest, isValidAddress) {
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auto DS = make_unique<NullDataStreamer>();
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StreamingMemoryObject O(std::move(DS));
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EXPECT_TRUE(O.isValidAddress(32 * 1024));
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}
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TEST(StreamingMemoryObjectTest, setKnownObjectSize) {
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auto DS = make_unique<NullDataStreamer>();
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StreamingMemoryObject O(std::move(DS));
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uint8_t Buf[32];
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EXPECT_EQ(16u, O.readBytes(Buf, 16, 0));
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O.setKnownObjectSize(24);
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EXPECT_EQ(8u, O.readBytes(Buf, 16, 16));
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}
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TEST(StreamingMemoryObjectTest, getPointer) {
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uint8_t InputBuffer[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
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StreamingMemoryObject O(make_unique<BufferStreamer>(StringRef(
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reinterpret_cast<const char *>(InputBuffer), sizeof(InputBuffer))));
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EXPECT_TRUE(std::equal(InputBuffer + 1, InputBuffer + 2, O.getPointer(1, 2)));
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EXPECT_TRUE(std::equal(InputBuffer + 3, InputBuffer + 7, O.getPointer(3, 4)));
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EXPECT_TRUE(std::equal(InputBuffer + 4, InputBuffer + 8, O.getPointer(4, 5)));
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EXPECT_TRUE(std::equal(InputBuffer, InputBuffer + 8, O.getPointer(0, 20)));
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}
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} // end namespace
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