FixedPointString.cpp
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#include "clang/AST/Type.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/SmallString.h"
#include "gtest/gtest.h"
using clang::FixedPointValueToString;
using llvm::APSInt;
using llvm::SmallString;
namespace {
TEST(FixedPointString, DifferentTypes) {
SmallString<64> S;
FixedPointValueToString(S, APSInt::get(320), 7);
ASSERT_STREQ(S.c_str(), "2.5");
S.clear();
FixedPointValueToString(S, APSInt::get(0), 7);
ASSERT_STREQ(S.c_str(), "0.0");
// signed short _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/false), 7);
ASSERT_STREQ(S.c_str(), "255.9921875");
// signed _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/false), 15);
ASSERT_STREQ(S.c_str(), "65535.999969482421875");
// signed long _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(64, /*Unsigned=*/false), 31);
ASSERT_STREQ(S.c_str(), "4294967295.9999999995343387126922607421875");
// unsigned short _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/true), 8);
ASSERT_STREQ(S.c_str(), "255.99609375");
// unsigned _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/true), 16);
ASSERT_STREQ(S.c_str(), "65535.9999847412109375");
// unsigned long _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(64, /*Unsigned=*/true), 32);
ASSERT_STREQ(S.c_str(), "4294967295.99999999976716935634613037109375");
// signed short _Fract
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(8, /*Unsigned=*/false), 7);
ASSERT_STREQ(S.c_str(), "0.9921875");
// signed _Fract
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/false), 15);
ASSERT_STREQ(S.c_str(), "0.999969482421875");
// signed long _Fract
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/false), 31);
ASSERT_STREQ(S.c_str(), "0.9999999995343387126922607421875");
// unsigned short _Fract
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(8, /*Unsigned=*/true), 8);
ASSERT_STREQ(S.c_str(), "0.99609375");
// unsigned _Fract
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/true), 16);
ASSERT_STREQ(S.c_str(), "0.9999847412109375");
// unsigned long _Fract
S.clear();
FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/true), 32);
ASSERT_STREQ(S.c_str(), "0.99999999976716935634613037109375");
}
TEST(FixedPointString, Negative) {
SmallString<64> S;
FixedPointValueToString(S, APSInt::get(-320), 7);
ASSERT_STREQ(S.c_str(), "-2.5");
S.clear();
FixedPointValueToString(S, APSInt::get(-64), 7);
ASSERT_STREQ(S.c_str(), "-0.5");
// signed short _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMinValue(16, /*Unsigned=*/false), 7);
ASSERT_STREQ(S.c_str(), "-256.0");
// signed _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMinValue(32, /*Unsigned=*/false), 15);
ASSERT_STREQ(S.c_str(), "-65536.0");
// signed long _Accum
S.clear();
FixedPointValueToString(S, APSInt::getMinValue(64, /*Unsigned=*/false), 31);
ASSERT_STREQ(S.c_str(), "-4294967296.0");
}
} // namespace