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| 1 | +//===-- Unittests for wctomb ----------------------------------------------===// |
| 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 "hdr/types/wchar_t.h" |
| 10 | +#include "src/__support/libc_errno.h" |
| 11 | +#include "src/wchar/wctomb.h" |
| 12 | +#include "test/UnitTest/ErrnoCheckingTest.h" |
| 13 | +#include "test/UnitTest/Test.h" |
| 14 | + |
| 15 | +using LlvmLibcWCToMBTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest; |
| 16 | + |
| 17 | +TEST(LlvmLibcWCToMBTest, OneByte) { |
| 18 | + wchar_t wc = L'U'; |
| 19 | + char mb[4]; |
| 20 | + int cnt = LIBC_NAMESPACE::wctomb(mb, wc); |
| 21 | + ASSERT_EQ(cnt, 1); |
| 22 | + ASSERT_EQ(mb[0], 'U'); |
| 23 | +} |
| 24 | + |
| 25 | +TEST(LlvmLibcWCToMBTest, TwoByte) { |
| 26 | + // testing utf32: 0xff -> utf8: 0xc3 0xbf |
| 27 | + wchar_t wc = 0xff; |
| 28 | + char mb[4]; |
| 29 | + int cnt = LIBC_NAMESPACE::wctomb(mb, wc); |
| 30 | + ASSERT_EQ(cnt, 2); |
| 31 | + ASSERT_EQ(mb[0], static_cast<char>(0xc3)); |
| 32 | + ASSERT_EQ(mb[1], static_cast<char>(0xbf)); |
| 33 | +} |
| 34 | + |
| 35 | +TEST(LlvmLibcWCToMBTest, ThreeByte) { |
| 36 | + // testing utf32: 0xac15 -> utf8: 0xea 0xb0 0x95 |
| 37 | + wchar_t wc = 0xac15; |
| 38 | + char mb[4]; |
| 39 | + int cnt = LIBC_NAMESPACE::wctomb(mb, wc); |
| 40 | + ASSERT_EQ(cnt, 3); |
| 41 | + ASSERT_EQ(mb[0], static_cast<char>(0xea)); |
| 42 | + ASSERT_EQ(mb[1], static_cast<char>(0xb0)); |
| 43 | + ASSERT_EQ(mb[2], static_cast<char>(0x95)); |
| 44 | +} |
| 45 | + |
| 46 | +TEST(LlvmLibcWCToMBTest, FourByte) { |
| 47 | + // testing utf32: 0x1f921 -> utf8: 0xf0 0x9f 0xa4 0xa1 |
| 48 | + wchar_t wc = 0x1f921; |
| 49 | + char mb[4]; |
| 50 | + int cnt = LIBC_NAMESPACE::wctomb(mb, wc); |
| 51 | + ASSERT_EQ(cnt, 4); |
| 52 | + ASSERT_EQ(mb[0], static_cast<char>(0xf0)); |
| 53 | + ASSERT_EQ(mb[1], static_cast<char>(0x9f)); |
| 54 | + ASSERT_EQ(mb[2], static_cast<char>(0xa4)); |
| 55 | + ASSERT_EQ(mb[3], static_cast<char>(0xa1)); |
| 56 | +} |
| 57 | + |
| 58 | +TEST(LlvmLibcWCToMBTest, NullString) { |
| 59 | + wchar_t wc = L'A'; |
| 60 | + |
| 61 | + int cnt = LIBC_NAMESPACE::wctomb(nullptr, wc); |
| 62 | + |
| 63 | + // no state-dependent encoding |
| 64 | + ASSERT_EQ(cnt, 0); |
| 65 | +} |
| 66 | + |
| 67 | +TEST(LlvmLibcWCToMBTest, InvalidWchar) { |
| 68 | + wchar_t wc = 0x12ffff; |
| 69 | + char mb[4]; |
| 70 | + int cnt = LIBC_NAMESPACE::wctomb(mb, wc); |
| 71 | + ASSERT_EQ(cnt, -1); |
| 72 | + ASSERT_ERRNO_EQ(EILSEQ); |
| 73 | +} |
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