libc/test/src/__support/CPP/cstddef_test.cpp

   1 //===-- Unittests for byte ------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/__support/CPP/cstddef.h"
  10 #include "test/UnitTest/Test.h"
  11
  12 namespace LIBC_NAMESPACE::cpp {
  13
  14 TEST(LlvmLibcByteTest, to_integer) {
  15   const char str[] = "abc";
  16   const byte *const ptr = reinterpret_cast<const byte *>(str);
  17   ASSERT_EQ(to_integer<char>(ptr[0]), 'a');
  18   ASSERT_EQ(to_integer<char>(ptr[1]), 'b');
  19   ASSERT_EQ(to_integer<char>(ptr[2]), 'c');
  20   ASSERT_EQ(to_integer<char>(ptr[3]), '\0');
  21 }
  22
  23 TEST(LlvmLibcByteTest, bitwise) {
  24   byte b{42};
  25   ASSERT_EQ(b, byte{0b00101010});
  26
  27   b <<= 1;
  28   ASSERT_EQ(b, byte{0b01010100});
  29   b >>= 1;
  30
  31   ASSERT_EQ((b << 1), byte{0b01010100});
  32   ASSERT_EQ((b >> 1), byte{0b00010101});
  33
  34   b |= byte{0b11110000};
  35   ASSERT_EQ(b, byte{0b11111010});
  36
  37   b &= byte{0b11110000};
  38   ASSERT_EQ(b, byte{0b11110000});
  39
  40   b ^= byte{0b11111111};
  41   ASSERT_EQ(b, byte{0b00001111});
  42 }
  43
  44 } // namespace LIBC_NAMESPACE::cpp