1//===- llvm/unittest/Support/raw_ostream_test.cpp - raw_ostream tests -----===//
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 "gtest/gtest.h"
11#include "llvm/ADT/SmallString.h"
12#include "llvm/Support/Format.h"
13#include "llvm/Support/raw_ostream.h"
14
15using namespace llvm;
16
17namespace {
18
19template<typename T> std::string printToString(const T &Value) {
20  std::string res;
21  llvm::raw_string_ostream(res) << Value;
22  return res;
23}
24
25/// printToString - Print the given value to a stream which only has \arg
26/// BytesLeftInBuffer bytes left in the buffer. This is useful for testing edge
27/// cases in the buffer handling logic.
28template<typename T> std::string printToString(const T &Value,
29                                               unsigned BytesLeftInBuffer) {
30  // FIXME: This is relying on internal knowledge of how raw_ostream works to
31  // get the buffer position right.
32  SmallString<256> SVec;
33  assert(BytesLeftInBuffer < 256 && "Invalid buffer count!");
34  llvm::raw_svector_ostream OS(SVec);
35  unsigned StartIndex = 256 - BytesLeftInBuffer;
36  for (unsigned i = 0; i != StartIndex; ++i)
37    OS << '?';
38  OS << Value;
39  return OS.str().substr(StartIndex);
40}
41
42template<typename T> std::string printToStringUnbuffered(const T &Value) {
43  std::string res;
44  llvm::raw_string_ostream OS(res);
45  OS.SetUnbuffered();
46  OS << Value;
47  return res;
48}
49
50TEST(raw_ostreamTest, Types_Buffered) {
51  // Char
52  EXPECT_EQ("c", printToString('c'));
53
54  // String
55  EXPECT_EQ("hello", printToString("hello"));
56  EXPECT_EQ("hello", printToString(std::string("hello")));
57
58  // Int
59  EXPECT_EQ("0", printToString(0));
60  EXPECT_EQ("2425", printToString(2425));
61  EXPECT_EQ("-2425", printToString(-2425));
62
63  // Long long
64  EXPECT_EQ("0", printToString(0LL));
65  EXPECT_EQ("257257257235709", printToString(257257257235709LL));
66  EXPECT_EQ("-257257257235709", printToString(-257257257235709LL));
67
68  // Double
69  EXPECT_EQ("1.100000e+00", printToString(1.1));
70
71  // void*
72  EXPECT_EQ("0x0", printToString((void*) nullptr));
73  EXPECT_EQ("0xbeef", printToString((void*) 0xbeef));
74  EXPECT_EQ("0xdeadbeef", printToString((void*) 0xdeadbeef));
75
76  // Min and max.
77  EXPECT_EQ("18446744073709551615", printToString(UINT64_MAX));
78  EXPECT_EQ("-9223372036854775808", printToString(INT64_MIN));
79}
80
81TEST(raw_ostreamTest, Types_Unbuffered) {
82  // Char
83  EXPECT_EQ("c", printToStringUnbuffered('c'));
84
85  // String
86  EXPECT_EQ("hello", printToStringUnbuffered("hello"));
87  EXPECT_EQ("hello", printToStringUnbuffered(std::string("hello")));
88
89  // Int
90  EXPECT_EQ("0", printToStringUnbuffered(0));
91  EXPECT_EQ("2425", printToStringUnbuffered(2425));
92  EXPECT_EQ("-2425", printToStringUnbuffered(-2425));
93
94  // Long long
95  EXPECT_EQ("0", printToStringUnbuffered(0LL));
96  EXPECT_EQ("257257257235709", printToStringUnbuffered(257257257235709LL));
97  EXPECT_EQ("-257257257235709", printToStringUnbuffered(-257257257235709LL));
98
99  // Double
100  EXPECT_EQ("1.100000e+00", printToStringUnbuffered(1.1));
101
102  // void*
103  EXPECT_EQ("0x0", printToStringUnbuffered((void*) nullptr));
104  EXPECT_EQ("0xbeef", printToStringUnbuffered((void*) 0xbeef));
105  EXPECT_EQ("0xdeadbeef", printToStringUnbuffered((void*) 0xdeadbeef));
106
107  // Min and max.
108  EXPECT_EQ("18446744073709551615", printToStringUnbuffered(UINT64_MAX));
109  EXPECT_EQ("-9223372036854775808", printToStringUnbuffered(INT64_MIN));
110}
111
112TEST(raw_ostreamTest, BufferEdge) {
113  EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 1));
114  EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 2));
115  EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 3));
116  EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 4));
117  EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 10));
118}
119
120TEST(raw_ostreamTest, TinyBuffer) {
121  std::string Str;
122  raw_string_ostream OS(Str);
123  OS.SetBufferSize(1);
124  OS << "hello";
125  OS << 1;
126  OS << 'w' << 'o' << 'r' << 'l' << 'd';
127  EXPECT_EQ("hello1world", OS.str());
128}
129
130TEST(raw_ostreamTest, WriteEscaped) {
131  std::string Str;
132
133  Str = "";
134  raw_string_ostream(Str).write_escaped("hi");
135  EXPECT_EQ("hi", Str);
136
137  Str = "";
138  raw_string_ostream(Str).write_escaped("\\\t\n\"");
139  EXPECT_EQ("\\\\\\t\\n\\\"", Str);
140
141  Str = "";
142  raw_string_ostream(Str).write_escaped("\1\10\200");
143  EXPECT_EQ("\\001\\010\\200", Str);
144}
145
146}
147