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
16 using namespace llvm;
17
18 namespace {
19
20 class NullDataStreamer : public DataStreamer {
GetBytes(unsigned char * Buffer,size_t Length)21 size_t GetBytes(unsigned char *Buffer, size_t Length) override {
22 memset(Buffer, 0, Length);
23 return Length;
24 }
25 };
26
27 class BufferStreamer : public DataStreamer {
28 StringRef Buffer;
29
30 public:
BufferStreamer(StringRef Buffer)31 BufferStreamer(StringRef Buffer) : Buffer(Buffer) {}
GetBytes(unsigned char * OutBuffer,size_t Length)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
TEST(StreamingMemoryObjectTest,isValidAddress)42 TEST(StreamingMemoryObjectTest, isValidAddress) {
43 auto DS = make_unique<NullDataStreamer>();
44 StreamingMemoryObject O(std::move(DS));
45 EXPECT_TRUE(O.isValidAddress(32 * 1024));
46 }
47
TEST(StreamingMemoryObjectTest,setKnownObjectSize)48 TEST(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
TEST(StreamingMemoryObjectTest,getPointer)57 TEST(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