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
15using LlvmLibcWCToMBTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
16
17TEST(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
25TEST(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
35TEST(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
46TEST(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
58TEST(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
67TEST(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}
74

source code of libc/test/src/wchar/wctomb_test.cpp