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//===- llvm/unittest/Support/raw_ostream_test.cpp - raw_ostream tests -----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
template<typename T> std::string printToString(const T &Value) {
std::string res;
llvm::raw_string_ostream(res) << Value;
return res;
}
/// printToString - Print the given value to a stream which only has \arg
/// BytesLeftInBuffer bytes left in the buffer. This is useful for testing edge
/// cases in the buffer handling logic.
template<typename T> std::string printToString(const T &Value,
unsigned BytesLeftInBuffer) {
// FIXME: This is relying on internal knowledge of how raw_ostream works to
// get the buffer position right.
SmallString<256> SVec;
assert(BytesLeftInBuffer < 256 && "Invalid buffer count!");
llvm::raw_svector_ostream OS(SVec);
unsigned StartIndex = 256 - BytesLeftInBuffer;
for (unsigned i = 0; i != StartIndex; ++i)
OS << '?';
OS << Value;
return OS.str().substr(StartIndex);
}
template<typename T> std::string printToStringUnbuffered(const T &Value) {
std::string res;
llvm::raw_string_ostream OS(res);
OS.SetUnbuffered();
OS << Value;
return res;
}
TEST(raw_ostreamTest, Types_Buffered) {
// Char
EXPECT_EQ("c", printToString('c'));
// String
EXPECT_EQ("hello", printToString("hello"));
EXPECT_EQ("hello", printToString(std::string("hello")));
// Int
EXPECT_EQ("0", printToString(0));
EXPECT_EQ("2425", printToString(2425));
EXPECT_EQ("-2425", printToString(-2425));
// Long long
EXPECT_EQ("0", printToString(0LL));
EXPECT_EQ("257257257235709", printToString(257257257235709LL));
EXPECT_EQ("-257257257235709", printToString(-257257257235709LL));
// Double
EXPECT_EQ("1.100000e+00", printToString(1.1));
// void*
EXPECT_EQ("0x0", printToString((void*) 0));
EXPECT_EQ("0xbeef", printToString((void*) 0xbeef));
EXPECT_EQ("0xdeadbeef", printToString((void*) 0xdeadbeef));
// Min and max.
EXPECT_EQ("18446744073709551615", printToString(UINT64_MAX));
EXPECT_EQ("-9223372036854775808", printToString(INT64_MIN));
}
TEST(raw_ostreamTest, Types_Unbuffered) {
// Char
EXPECT_EQ("c", printToStringUnbuffered('c'));
// String
EXPECT_EQ("hello", printToStringUnbuffered("hello"));
EXPECT_EQ("hello", printToStringUnbuffered(std::string("hello")));
// Int
EXPECT_EQ("0", printToStringUnbuffered(0));
EXPECT_EQ("2425", printToStringUnbuffered(2425));
EXPECT_EQ("-2425", printToStringUnbuffered(-2425));
// Long long
EXPECT_EQ("0", printToStringUnbuffered(0LL));
EXPECT_EQ("257257257235709", printToStringUnbuffered(257257257235709LL));
EXPECT_EQ("-257257257235709", printToStringUnbuffered(-257257257235709LL));
// Double
EXPECT_EQ("1.100000e+00", printToStringUnbuffered(1.1));
// void*
EXPECT_EQ("0x0", printToStringUnbuffered((void*) 0));
EXPECT_EQ("0xbeef", printToStringUnbuffered((void*) 0xbeef));
EXPECT_EQ("0xdeadbeef", printToStringUnbuffered((void*) 0xdeadbeef));
// Min and max.
EXPECT_EQ("18446744073709551615", printToStringUnbuffered(UINT64_MAX));
EXPECT_EQ("-9223372036854775808", printToStringUnbuffered(INT64_MIN));
}
TEST(raw_ostreamTest, BufferEdge) {
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 1));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 2));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 3));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 4));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 10));
}
TEST(raw_ostreamTest, TinyBuffer) {
std::string Str;
raw_string_ostream OS(Str);
OS.SetBufferSize(1);
OS << "hello";
OS << 1;
OS << 'w' << 'o' << 'r' << 'l' << 'd';
EXPECT_EQ("hello1world", OS.str());
}
}
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