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//===-- Unittests for wcstombs --------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/stdlib/wcstombs.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/Test.h"
using LlvmLibcWcstombs = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
// these tests are fairly simple as this function just calls into the internal
// wcsnrtombs which is more thoroughly tested
TEST_F(LlvmLibcWcstombs, AllMultibyteLengths) {
/// clown emoji, sigma symbol, y with diaeresis, letter A
const wchar_t src[] = {static_cast<wchar_t>(0x1f921),
static_cast<wchar_t>(0x2211),
static_cast<wchar_t>(0xff), static_cast<wchar_t>(0x41),
static_cast<wchar_t>(0x0)};
char mbs[11];
ASSERT_EQ(LIBC_NAMESPACE::wcstombs(mbs, src, 11), static_cast<size_t>(10));
ASSERT_ERRNO_SUCCESS();
ASSERT_EQ(mbs[0], '\xF0'); // clown begin
ASSERT_EQ(mbs[1], '\x9F');
ASSERT_EQ(mbs[2], '\xA4');
ASSERT_EQ(mbs[3], '\xA1');
ASSERT_EQ(mbs[4], '\xE2'); // sigma begin
ASSERT_EQ(mbs[5], '\x88');
ASSERT_EQ(mbs[6], '\x91');
ASSERT_EQ(mbs[7], '\xC3'); // y diaeresis begin
ASSERT_EQ(mbs[8], '\xBF');
ASSERT_EQ(mbs[9], '\x41'); // A begin
ASSERT_EQ(mbs[10], '\0'); // null terminator
}
TEST_F(LlvmLibcWcstombs, DestLimit) {
/// clown emoji, sigma symbol, y with diaeresis, letter A
const wchar_t src[] = {static_cast<wchar_t>(0x1f921),
static_cast<wchar_t>(0x2211),
static_cast<wchar_t>(0xff), static_cast<wchar_t>(0x41),
static_cast<wchar_t>(0x0)};
char mbs[11];
for (int i = 0; i < 11; ++i)
mbs[i] = '\x01'; // dummy initial values
ASSERT_EQ(LIBC_NAMESPACE::wcstombs(mbs, src, 4), static_cast<size_t>(4));
ASSERT_ERRNO_SUCCESS();
ASSERT_EQ(mbs[0], '\xF0');
ASSERT_EQ(mbs[1], '\x9F');
ASSERT_EQ(mbs[2], '\xA4');
ASSERT_EQ(mbs[3], '\xA1');
ASSERT_EQ(mbs[4], '\x01'); // didn't write more than 4 bytes
for (int i = 0; i < 11; ++i)
mbs[i] = '\x01'; // dummy initial values
// not enough bytes to convert the second character, so only converts one
ASSERT_EQ(LIBC_NAMESPACE::wcstombs(mbs, src, 6), static_cast<size_t>(4));
ASSERT_ERRNO_SUCCESS();
ASSERT_EQ(mbs[0], '\xF0');
ASSERT_EQ(mbs[1], '\x9F');
ASSERT_EQ(mbs[2], '\xA4');
ASSERT_EQ(mbs[3], '\xA1');
ASSERT_EQ(mbs[4], '\x01');
}
TEST_F(LlvmLibcWcstombs, ErrnoTest) {
const wchar_t src[] = {static_cast<wchar_t>(0x1f921),
static_cast<wchar_t>(0x2211),
static_cast<wchar_t>(0x12ffff), // invalid widechar
static_cast<wchar_t>(0x0)};
char mbs[11];
// n parameter ignored when dest is null
ASSERT_EQ(LIBC_NAMESPACE::wcstombs(mbs, src, 7), static_cast<size_t>(7));
ASSERT_ERRNO_SUCCESS();
ASSERT_EQ(LIBC_NAMESPACE::wcstombs(mbs, src, 100), static_cast<size_t>(-1));
ASSERT_ERRNO_EQ(EILSEQ);
}
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