clang/unittests/Frontend/FixedPointString.cpp

   1 #include "clang/AST/Type.h"
   2 #include "llvm/ADT/APSInt.h"
   3 #include "llvm/ADT/SmallString.h"
   4 #include "gtest/gtest.h"
   5
   6 using clang::FixedPointValueToString;
   7 using llvm::APSInt;
   8 using llvm::SmallString;
   9
  10 namespace {
  11
  12 TEST(FixedPointString, DifferentTypes) {
  13   SmallString<64> S;
  14   FixedPointValueToString(S, APSInt::get(320), 7);
  15   ASSERT_STREQ(S.c_str(), "2.5");
  16
  17   S.clear();
  18   FixedPointValueToString(S, APSInt::get(0), 7);
  19   ASSERT_STREQ(S.c_str(), "0.0");
  20
  21   // signed short _Accum
  22   S.clear();
  23   FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/false), 7);
  24   ASSERT_STREQ(S.c_str(), "255.9921875");
  25
  26   // signed _Accum
  27   S.clear();
  28   FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/false), 15);
  29   ASSERT_STREQ(S.c_str(), "65535.999969482421875");
  30
  31   // signed long _Accum
  32   S.clear();
  33   FixedPointValueToString(S, APSInt::getMaxValue(64, /*Unsigned=*/false), 31);
  34   ASSERT_STREQ(S.c_str(), "4294967295.9999999995343387126922607421875");
  35
  36   // unsigned short _Accum
  37   S.clear();
  38   FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/true), 8);
  39   ASSERT_STREQ(S.c_str(), "255.99609375");
  40
  41   // unsigned _Accum
  42   S.clear();
  43   FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/true), 16);
  44   ASSERT_STREQ(S.c_str(), "65535.9999847412109375");
  45
  46   // unsigned long _Accum
  47   S.clear();
  48   FixedPointValueToString(S, APSInt::getMaxValue(64, /*Unsigned=*/true), 32);
  49   ASSERT_STREQ(S.c_str(), "4294967295.99999999976716935634613037109375");
  50
  51   // signed short _Fract
  52   S.clear();
  53   FixedPointValueToString(S, APSInt::getMaxValue(8, /*Unsigned=*/false), 7);
  54   ASSERT_STREQ(S.c_str(), "0.9921875");
  55
  56   // signed _Fract
  57   S.clear();
  58   FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/false), 15);
  59   ASSERT_STREQ(S.c_str(), "0.999969482421875");
  60
  61   // signed long _Fract
  62   S.clear();
  63   FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/false), 31);
  64   ASSERT_STREQ(S.c_str(), "0.9999999995343387126922607421875");
  65
  66   // unsigned short _Fract
  67   S.clear();
  68   FixedPointValueToString(S, APSInt::getMaxValue(8, /*Unsigned=*/true), 8);
  69   ASSERT_STREQ(S.c_str(), "0.99609375");
  70
  71   // unsigned _Fract
  72   S.clear();
  73   FixedPointValueToString(S, APSInt::getMaxValue(16, /*Unsigned=*/true), 16);
  74   ASSERT_STREQ(S.c_str(), "0.9999847412109375");
  75
  76   // unsigned long _Fract
  77   S.clear();
  78   FixedPointValueToString(S, APSInt::getMaxValue(32, /*Unsigned=*/true), 32);
  79   ASSERT_STREQ(S.c_str(), "0.99999999976716935634613037109375");
  80 }
  81
  82 TEST(FixedPointString, Negative) {
  83   SmallString<64> S;
  84   FixedPointValueToString(S, APSInt::get(-320), 7);
  85   ASSERT_STREQ(S.c_str(), "-2.5");
  86
  87   S.clear();
  88   FixedPointValueToString(S, APSInt::get(-64), 7);
  89   ASSERT_STREQ(S.c_str(), "-0.5");
  90
  91   // signed short _Accum
  92   S.clear();
  93   FixedPointValueToString(S, APSInt::getMinValue(16, /*Unsigned=*/false), 7);
  94   ASSERT_STREQ(S.c_str(), "-256.0");
  95
  96   // signed _Accum
  97   S.clear();
  98   FixedPointValueToString(S, APSInt::getMinValue(32, /*Unsigned=*/false), 15);
  99   ASSERT_STREQ(S.c_str(), "-65536.0");
 100
 101   // signed long _Accum
 102   S.clear();
 103   FixedPointValueToString(S, APSInt::getMinValue(64, /*Unsigned=*/false), 31);
 104   ASSERT_STREQ(S.c_str(), "-4294967296.0");
 105 }
 106
 107 } // namespace