1//===- unittests/Support/StreamingMemoryObjectTest.cpp --------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/ADT/STLExtras.h"
11#include "llvm/ADT/StringRef.h"
12#include "llvm/Support/StreamingMemoryObject.h"
13#include "gtest/gtest.h"
14#include <string.h>
15
16using namespace llvm;
17
18namespace {
19
20class NullDataStreamer : public DataStreamer {
21  size_t GetBytes(unsigned char *Buffer, size_t Length) override {
22    memset(Buffer, 0, Length);
23    return Length;
24  }
25};
26
27class BufferStreamer : public DataStreamer {
28  StringRef Buffer;
29
30public:
31  BufferStreamer(StringRef Buffer) : Buffer(Buffer) {}
32  size_t GetBytes(unsigned char *OutBuffer, size_t Length) override {
33    if (Length >= Buffer.size())
34      Length = Buffer.size();
35
36    std::copy(Buffer.begin(), Buffer.begin() + Length, OutBuffer);
37    Buffer = Buffer.drop_front(Length);
38    return Length;
39  }
40};
41
42TEST(StreamingMemoryObjectTest, isValidAddress) {
43  auto DS = make_unique<NullDataStreamer>();
44  StreamingMemoryObject O(std::move(DS));
45  EXPECT_TRUE(O.isValidAddress(32 * 1024));
46}
47
48TEST(StreamingMemoryObjectTest, setKnownObjectSize) {
49  auto DS = make_unique<NullDataStreamer>();
50  StreamingMemoryObject O(std::move(DS));
51  uint8_t Buf[32];
52  EXPECT_EQ(16u, O.readBytes(Buf, 16, 0));
53  O.setKnownObjectSize(24);
54  EXPECT_EQ(8u, O.readBytes(Buf, 16, 16));
55}
56
57TEST(StreamingMemoryObjectTest, getPointer) {
58  uint8_t InputBuffer[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
59  StreamingMemoryObject O(make_unique<BufferStreamer>(StringRef(
60      reinterpret_cast<const char *>(InputBuffer), sizeof(InputBuffer))));
61
62  EXPECT_TRUE(std::equal(InputBuffer + 1, InputBuffer + 2, O.getPointer(1, 2)));
63  EXPECT_TRUE(std::equal(InputBuffer + 3, InputBuffer + 7, O.getPointer(3, 4)));
64  EXPECT_TRUE(std::equal(InputBuffer + 4, InputBuffer + 8, O.getPointer(4, 5)));
65  EXPECT_TRUE(std::equal(InputBuffer, InputBuffer + 8, O.getPointer(0, 20)));
66}
67
68} // end namespace
69