172 lines · cpp
1//===-- Unittests for mbstowcs --------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "hdr/errno_macros.h"10#include "hdr/types/wchar_t.h"11#include "src/__support/macros/null_check.h"12#include "src/stdlib/mbstowcs.h"13#include "test/UnitTest/ErrnoCheckingTest.h"14#include "test/UnitTest/Test.h"15 16using LlvmLibcMBSToWCSTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;17 18TEST_F(LlvmLibcMBSToWCSTest, OneByteOneChar) {19 const char *ch = "A";20 const char *original = ch;21 wchar_t dest[2];22 size_t n = LIBC_NAMESPACE::mbstowcs(dest, ch, 1);23 ASSERT_EQ(static_cast<char>(*dest), 'A');24 ASSERT_EQ(static_cast<int>(n), 1);25 // Making sure the pointer is not getting updated26 ASSERT_EQ(ch, original);27 ASSERT_ERRNO_SUCCESS();28 29 n = LIBC_NAMESPACE::mbstowcs(dest + 1, ch + 1, 1);30 ASSERT_EQ(static_cast<char>(dest[1]), '\0');31 // Should not include null terminator32 ASSERT_EQ(static_cast<int>(n), 0);33 // Making sure the pointer is not getting updated34 ASSERT_EQ(ch, original);35 ASSERT_ERRNO_SUCCESS();36}37 38TEST_F(LlvmLibcMBSToWCSTest, FourByteOneChar) {39 const char *src = "\xf0\x9f\x98\xb9"; // laughing cat emoji 😹40 const char *original = src;41 wchar_t dest[2];42 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 2);43 ASSERT_ERRNO_SUCCESS();44 ASSERT_EQ(static_cast<int>(dest[0]), 128569);45 ASSERT_TRUE(dest[1] == L'\0');46 // Should not count null terminator in number47 ASSERT_EQ(static_cast<int>(n), 1);48 // Making sure the pointer is not getting updated49 ASSERT_EQ(src, original);50}51 52TEST_F(LlvmLibcMBSToWCSTest, MultiByteTwoCharacters) {53 // Two laughing cat emojis "😹😹"54 const char *src = "\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9";55 const char *original = src;56 wchar_t dest[3];57 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 3);58 ASSERT_ERRNO_SUCCESS();59 ASSERT_EQ(static_cast<int>(dest[0]), 128569);60 ASSERT_EQ(static_cast<int>(dest[1]), 128569);61 ASSERT_TRUE(dest[2] == L'\0');62 // Should not count null terminator in number63 ASSERT_EQ(static_cast<int>(n), 2);64 // Making sure the pointer is not getting updated65 ASSERT_EQ(src, original);66}67 68TEST_F(LlvmLibcMBSToWCSTest, MixedNumberOfBytes) {69 // 'A', sigma symbol 'Σ', recycling symbol '♻', laughing cat emoji '😹'70 const char *src = "A\xce\xa3\xe2\x99\xbb\xf0\x9f\x98\xb9";71 const char *original = src;72 wchar_t dest[5];73 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 5);74 ASSERT_ERRNO_SUCCESS();75 ASSERT_EQ(static_cast<char>(dest[0]), 'A');76 ASSERT_EQ(static_cast<int>(dest[1]), 931);77 ASSERT_EQ(static_cast<int>(dest[2]), 9851);78 ASSERT_EQ(static_cast<int>(dest[3]), 128569);79 ASSERT_TRUE(dest[4] == L'\0');80 // Should not count null terminator in number81 ASSERT_EQ(static_cast<int>(n), 4);82 // Making sure the pointer is not getting updated83 ASSERT_EQ(src, original);84}85 86TEST_F(LlvmLibcMBSToWCSTest, ReadLessThanStringLength) {87 // Four laughing cat emojis "😹😹😹😹"88 const char *src =89 "\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9";90 const char *original = src;91 wchar_t dest[5] = {L'a', L'b', L'c', L'd', L'e'};92 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 3);93 ASSERT_ERRNO_SUCCESS();94 // Should have read 3 emojis95 ASSERT_EQ(static_cast<int>(n), 3);96 ASSERT_EQ(static_cast<int>(dest[0]), 128569);97 ASSERT_EQ(static_cast<int>(dest[1]), 128569);98 ASSERT_EQ(static_cast<int>(dest[2]), 128569);99 ASSERT_TRUE(dest[3] == L'd');100 ASSERT_TRUE(dest[4] == L'e');101 // Making sure the pointer is not getting updated102 ASSERT_EQ(src, original);103}104 105TEST_F(LlvmLibcMBSToWCSTest, InvalidFirstByte) {106 // 0x80 is invalid first byte of mb character107 const char *src =108 "\x80\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9";109 wchar_t dest[3];110 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 3);111 // Should return error and set errno112 ASSERT_EQ(static_cast<int>(n), -1);113 ASSERT_ERRNO_EQ(EILSEQ);114}115 116TEST_F(LlvmLibcMBSToWCSTest, InvalidMiddleByte) {117 // The 7th byte is invalid for a 4 byte character118 const char *src =119 "\xf0\x9f\x98\xb9\xf0\x9f\xf0\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9";120 const char *original = src;121 wchar_t dest[3];122 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 5);123 // Should return error and set errno124 ASSERT_EQ(static_cast<int>(n), -1);125 ASSERT_ERRNO_EQ(EILSEQ);126 // Making sure the pointer is not getting updated127 ASSERT_EQ(src, original);128}129 130TEST_F(LlvmLibcMBSToWCSTest, NullDestination) {131 // Four laughing cat emojis "😹😹😹😹"132 const char *src =133 "\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9";134 const char *original = src;135 size_t n = LIBC_NAMESPACE::mbstowcs(nullptr, src, 2);136 ASSERT_ERRNO_SUCCESS();137 // Null destination should ignore len and read till end of string138 ASSERT_EQ(static_cast<int>(n), 4);139 // Making sure the pointer is not getting updated140 ASSERT_EQ(src, original);141}142 143TEST_F(LlvmLibcMBSToWCSTest, ErrnoChecks) {144 // Two laughing cat emojis and invalid 3rd mb char (3rd byte of it)145 const char *src =146 "\xf0\x9f\x98\xb9\xf0\x9f\x98\xb9\xf0\x9f\xf0\xb9\xf0\x9f\x98\xb9";147 const char *original = src;148 wchar_t dest[5];149 // First two bytes are valid --> should not set errno150 size_t n = LIBC_NAMESPACE::mbstowcs(dest, src, 2);151 ASSERT_ERRNO_SUCCESS();152 ASSERT_EQ(static_cast<int>(n), 2);153 ASSERT_EQ(static_cast<int>(dest[0]), 128569);154 ASSERT_EQ(static_cast<int>(dest[1]), 128569);155 // Making sure the pointer is not getting updated156 ASSERT_EQ(src, original);157 // Trying to read the 3rd byte should set errno158 n = LIBC_NAMESPACE::mbstowcs(dest, src + 2, 2);159 ASSERT_ERRNO_EQ(EILSEQ);160 ASSERT_EQ(static_cast<int>(n), -1);161 // Making sure the pointer is not getting updated162 ASSERT_EQ(src, original);163}164 165#if defined(LIBC_ADD_NULL_CHECKS)166TEST(LlvmLibcMBSToWCSTest, NullptrCrash) {167 // Passing in a nullptr should crash the program.168 EXPECT_DEATH([] { LIBC_NAMESPACE::mbstowcs(nullptr, nullptr, 1); },169 WITH_SIGNAL(-1));170}171#endif // LIBC_ADD_NULL_CHECKS172