tests/wchar_test.cpp - platform_bionic - Gitiles

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <gtest/gtest.h>

 #include <errno.h>
 #include <limits.h>
 #include <locale.h>
 #include <stdint.h>
 #include <wchar.h>

 TEST(wchar, sizeof_wchar_t) {
   EXPECT_EQ(4U, sizeof(wchar_t));
   EXPECT_EQ(4U, sizeof(wint_t));
 }

 TEST(wchar, mbrlen) {
   char bytes[] = { 'h', 'e', 'l', 'l', 'o', '\0' };
   EXPECT_EQ(0U, mbrlen(&bytes[0], 0, NULL));
   EXPECT_EQ(1U, mbrlen(&bytes[0], 1, NULL));

   EXPECT_EQ(1U, mbrlen(&bytes[4], 1, NULL));
   EXPECT_EQ(0U, mbrlen(&bytes[5], 1, NULL));
 }

 TEST(wchar, wctomb_wcrtomb) {
   // wctomb and wcrtomb behave differently when s == NULL.
   EXPECT_EQ(0, wctomb(NULL, L'h'));
   EXPECT_EQ(0, wctomb(NULL, L'\0'));
   EXPECT_EQ(1U, wcrtomb(NULL, L'\0', NULL));
   EXPECT_EQ(1U, wcrtomb(NULL, L'h', NULL));

   char bytes[MB_LEN_MAX];

   // wctomb and wcrtomb behave similarly for the null wide character.
   EXPECT_EQ(1, wctomb(bytes, L'\0'));
   EXPECT_EQ(1U, wcrtomb(bytes, L'\0', NULL));

   // ...and for regular characters.
   memset(bytes, 0, sizeof(bytes));
   EXPECT_EQ(1, wctomb(bytes, L'h'));
   EXPECT_EQ('h', bytes[0]);
   memset(bytes, 0, sizeof(bytes));
   EXPECT_EQ(1U, wcrtomb(bytes, L'h', NULL));
   EXPECT_EQ('h', bytes[0]);

   ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
   uselocale(LC_GLOBAL_LOCALE);

   // 1-byte UTF-8.
   memset(bytes, 0, sizeof(bytes));
   EXPECT_EQ(1U, wcrtomb(bytes, L'h', NULL));
   EXPECT_EQ('h', bytes[0]);
   // 2-byte UTF-8.
   memset(bytes, 0, sizeof(bytes));
   EXPECT_EQ(2U, wcrtomb(bytes, 0x00a2, NULL));
   EXPECT_EQ('\xc2', bytes[0]);
   EXPECT_EQ('\xa2', bytes[1]);
   // 3-byte UTF-8.
   memset(bytes, 0, sizeof(bytes));
   EXPECT_EQ(3U, wcrtomb(bytes, 0x20ac, NULL));
   EXPECT_EQ('\xe2', bytes[0]);
   EXPECT_EQ('\x82', bytes[1]);
   EXPECT_EQ('\xac', bytes[2]);
   // 4-byte UTF-8.
   memset(bytes, 0, sizeof(bytes));
   EXPECT_EQ(4U, wcrtomb(bytes, 0x24b62, NULL));
   EXPECT_EQ('\xf0', bytes[0]);
   EXPECT_EQ('\xa4', bytes[1]);
   EXPECT_EQ('\xad', bytes[2]);
   EXPECT_EQ('\xa2', bytes[3]);
   // Invalid code point.
   EXPECT_EQ(static_cast<size_t>(-1), wcrtomb(bytes, 0xffffffff, NULL));
   EXPECT_EQ(EILSEQ, errno);
 }

 TEST(wchar, wcstombs_wcrtombs) {
   const wchar_t chars[] = { L'h', L'e', L'l', L'l', L'o', 0 };
   const wchar_t bad_chars[] = { L'h', L'i', 0xffffffff, 0 };
   const wchar_t* src;
   char bytes[BUFSIZ];

   // Given a NULL destination, these functions count valid characters.
   EXPECT_EQ(5U, wcstombs(NULL, chars, 0));
   EXPECT_EQ(5U, wcstombs(NULL, chars, 4));
   EXPECT_EQ(5U, wcstombs(NULL, chars, 256));
   src = chars;
   EXPECT_EQ(5U, wcsrtombs(NULL, &src, 0, NULL));
   EXPECT_EQ(&chars[0], src);
   src = chars;
   EXPECT_EQ(5U, wcsrtombs(NULL, &src, 4, NULL));
   EXPECT_EQ(&chars[0], src);
   src = chars;
   EXPECT_EQ(5U, wcsrtombs(NULL, &src, 256, NULL));
   EXPECT_EQ(&chars[0], src);

   // An unrepresentable char just returns an error from wcstombs...
   errno = 0;
   EXPECT_EQ(static_cast<size_t>(-1), wcstombs(NULL, bad_chars, 0));
   EXPECT_EQ(EILSEQ, errno);
   errno = 0;
   EXPECT_EQ(static_cast<size_t>(-1), wcstombs(NULL, bad_chars, 256));
   EXPECT_EQ(EILSEQ, errno);

   // And wcsrtombs doesn't tell us where it got stuck because we didn't ask it
   // to actually convert anything...
   errno = 0;
   src = bad_chars;
   EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(NULL, &src, 0, NULL));
   EXPECT_EQ(&bad_chars[0], src);
   EXPECT_EQ(EILSEQ, errno);
   errno = 0;
   src = bad_chars;
   EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(NULL, &src, 256, NULL));
   EXPECT_EQ(&bad_chars[0], src);
   EXPECT_EQ(EILSEQ, errno);

   // Okay, now let's test actually converting something...
   memset(bytes, 'x', sizeof(bytes));
   EXPECT_EQ(0U, wcstombs(bytes, chars, 0));
   memset(bytes, 'x', sizeof(bytes));
   EXPECT_EQ(4U, wcstombs(bytes, chars, 4));
   bytes[5] = 0;
   EXPECT_STREQ("hellx", bytes);
   memset(bytes, 'x', sizeof(bytes));
   EXPECT_EQ(5U, wcstombs(bytes, chars, 256));
   EXPECT_STREQ("hello", bytes);
   memset(bytes, 'x', sizeof(bytes));
   EXPECT_EQ(5U, wcstombs(bytes, chars, 6));
   EXPECT_STREQ("hello", bytes);
   errno = 0;
   memset(bytes, 'x', sizeof(bytes));
   EXPECT_EQ(static_cast<size_t>(-1), wcstombs(bytes, bad_chars, 256));
   EXPECT_EQ(EILSEQ, errno);
   bytes[3] = 0;
   EXPECT_STREQ("hix", bytes);

   // wcsrtombs is a bit more informative...
   memset(bytes, 'x', sizeof(bytes));
   src = chars;
   EXPECT_EQ(0U, wcsrtombs(bytes, &src, 0, NULL));
   EXPECT_EQ(&chars[0], src); // No input consumed.
   EXPECT_EQ(EILSEQ, errno);

   memset(bytes, 'x', sizeof(bytes));
   src = chars;
   EXPECT_EQ(4U, wcsrtombs(bytes, &src, 4, NULL));
   EXPECT_EQ(&chars[4], src); // Some input consumed.
   EXPECT_EQ(EILSEQ, errno);
   bytes[5] = 0;
   EXPECT_STREQ("hellx", bytes);

   memset(bytes, 'x', sizeof(bytes));
   src = chars;
   EXPECT_EQ(5U, wcsrtombs(bytes, &src, 256, NULL));
   EXPECT_EQ(NULL, src); // All input consumed!
   EXPECT_EQ(EILSEQ, errno);
   EXPECT_STREQ("hello", bytes);

   memset(bytes, 'x', sizeof(bytes));
   src = chars;
   EXPECT_EQ(5U, wcsrtombs(bytes, &src, 6, NULL));
   EXPECT_EQ(NULL, src); // All input consumed.
   EXPECT_EQ(EILSEQ, errno);
   EXPECT_STREQ("hello", bytes);

   memset(bytes, 'x', sizeof(bytes));
   src = bad_chars;
   EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(bytes, &src, 256, NULL));
   EXPECT_EQ(&bad_chars[2], src);
   EXPECT_EQ(EILSEQ, errno);
   bytes[3] = 0;
   EXPECT_STREQ("hix", bytes);
 }

 TEST(wchar, limits) {
   ASSERT_LT(WCHAR_MIN, WCHAR_MAX);
 }

 TEST(wchar, wcsstr_wcswcs) {
   const wchar_t* haystack = L"matches hello world, not the second hello world";
   const wchar_t* empty_needle = L"";
   const wchar_t* good_needle = L"ll";
   const wchar_t* bad_needle = L"wort";

   ASSERT_EQ(haystack, wcsstr(haystack, empty_needle));
   ASSERT_EQ(&haystack[10], wcsstr(haystack, good_needle));
   ASSERT_EQ(NULL, wcsstr(haystack, bad_needle));

   ASSERT_EQ(haystack, wcswcs(haystack, empty_needle));
   ASSERT_EQ(&haystack[10], wcswcs(haystack, good_needle));
   ASSERT_EQ(NULL, wcswcs(haystack, bad_needle));
 }

 TEST(wchar, mbtowc) {
   wchar_t out[8];

   out[0] = 'x';
   ASSERT_EQ(0, mbtowc(out, "hello", 0));
   ASSERT_EQ('x', out[0]);

   ASSERT_EQ(0, mbtowc(out, "hello", 0));
   ASSERT_EQ(0, mbtowc(out, "", 0));
   ASSERT_EQ(1, mbtowc(out, "hello", 1));
   ASSERT_EQ(L'h', out[0]);

   ASSERT_EQ(0, mbtowc(NULL, "hello", 0));
   ASSERT_EQ(0, mbtowc(NULL, "", 0));
   ASSERT_EQ(1, mbtowc(NULL, "hello", 1));

   ASSERT_EQ(0, mbtowc(NULL, NULL, 0));
 }

 TEST(wchar, mbrtowc) {
   wchar_t out[8];

   out[0] = 'x';
   ASSERT_EQ(0U, mbrtowc(out, "hello", 0, NULL));
   ASSERT_EQ('x', out[0]);

   ASSERT_EQ(0U, mbrtowc(out, "hello", 0, NULL));
   ASSERT_EQ(0U, mbrtowc(out, "", 0, NULL));
   ASSERT_EQ(1U, mbrtowc(out, "hello", 1, NULL));
   ASSERT_EQ(L'h', out[0]);

   ASSERT_EQ(0U, mbrtowc(NULL, "hello", 0, NULL));
   ASSERT_EQ(0U, mbrtowc(NULL, "", 0, NULL));
   ASSERT_EQ(1U, mbrtowc(NULL, "hello", 1, NULL));

   ASSERT_EQ(0U, mbrtowc(NULL, NULL, 0, NULL));

   ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
   uselocale(LC_GLOBAL_LOCALE);

   // 1-byte UTF-8.
   ASSERT_EQ(1U, mbrtowc(out, "abcdef", 6, NULL));
   ASSERT_EQ(L'a', out[0]);
   // 2-byte UTF-8.
   ASSERT_EQ(2U, mbrtowc(out, "\xc2\xa2" "cdef", 6, NULL));
   ASSERT_EQ(0x00a2, out[0]);
   // 3-byte UTF-8.
   ASSERT_EQ(3U, mbrtowc(out, "\xe2\x82\xac" "def", 6, NULL));
   ASSERT_EQ(0x20ac, out[0]);
   // 4-byte UTF-8.
   ASSERT_EQ(4U, mbrtowc(out, "\xf0\xa4\xad\xa2" "ef", 6, NULL));
   ASSERT_EQ(0x24b62, out[0]);
 #if __BIONIC__ // glibc allows this.
   // Illegal 5-byte UTF-8.
   ASSERT_EQ(static_cast<size_t>(-1), mbrtowc(out, "\xf8\xa1\xa2\xa3\xa4" "f", 6, NULL));
   ASSERT_EQ(EILSEQ, errno);
 #endif
   // Illegal over-long sequence.
   ASSERT_EQ(static_cast<size_t>(-1), mbrtowc(out, "\xf0\x82\x82\xac" "ef", 6, NULL));
   ASSERT_EQ(EILSEQ, errno);
 }

 TEST(wchar, wcstod) {
   ASSERT_DOUBLE_EQ(1.23, wcstod(L"1.23", NULL));
 }

 TEST(wchar, wcstof) {
   ASSERT_FLOAT_EQ(1.23f, wcstof(L"1.23", NULL));
 }

 TEST(wchar, wcstol) {
   ASSERT_EQ(123L, wcstol(L"123", NULL, 0));
 }

 TEST(wchar, wcstoll) {
   ASSERT_EQ(123LL, wcstol(L"123", NULL, 0));
 }

 TEST(wchar, wcstold) {
   ASSERT_DOUBLE_EQ(1.23L, wcstold(L"1.23", NULL));
 }

 TEST(wchar, wcstoul) {
   ASSERT_EQ(123UL, wcstoul(L"123", NULL, 0));
 }

 TEST(wchar, wcstoull) {
   ASSERT_EQ(123ULL, wcstoul(L"123", NULL, 0));
 }

 TEST(wchar, mbsnrtowcs) {
   wchar_t dst[128];
   const char* s = "hello, world!";
   const char* src;

   memset(dst, 0, sizeof(dst));
   src = s;
   ASSERT_EQ(0U, mbsnrtowcs(dst, &src, 0, 0, NULL));

   memset(dst, 0, sizeof(dst));
   src = s;
   ASSERT_EQ(2U, mbsnrtowcs(dst, &src, 2, 123, NULL)); // glibc chokes on SIZE_MAX here.
   ASSERT_EQ(L'h', dst[0]);
   ASSERT_EQ(L'e', dst[1]);
   ASSERT_EQ(&s[2], src);

   memset(dst, 0, sizeof(dst));
   src = s;
   ASSERT_EQ(3U, mbsnrtowcs(dst, &src, SIZE_MAX, 3, NULL));
   ASSERT_EQ(L'h', dst[0]);
   ASSERT_EQ(L'e', dst[1]);
   ASSERT_EQ(L'l', dst[2]);
   ASSERT_EQ(&s[3], src);
 }
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <gtest/gtest.h>

	#include <errno.h>
	#include <limits.h>
	#include <locale.h>
	#include <stdint.h>
	#include <wchar.h>

	TEST(wchar, sizeof_wchar_t) {
	EXPECT_EQ(4U, sizeof(wchar_t));
	EXPECT_EQ(4U, sizeof(wint_t));
	}

	TEST(wchar, mbrlen) {
	char bytes[] = { 'h', 'e', 'l', 'l', 'o', '\0' };
	EXPECT_EQ(0U, mbrlen(&bytes[0], 0, NULL));
	EXPECT_EQ(1U, mbrlen(&bytes[0], 1, NULL));

	EXPECT_EQ(1U, mbrlen(&bytes[4], 1, NULL));
	EXPECT_EQ(0U, mbrlen(&bytes[5], 1, NULL));
	}

	TEST(wchar, wctomb_wcrtomb) {
	// wctomb and wcrtomb behave differently when s == NULL.
	EXPECT_EQ(0, wctomb(NULL, L'h'));
	EXPECT_EQ(0, wctomb(NULL, L'\0'));
	EXPECT_EQ(1U, wcrtomb(NULL, L'\0', NULL));
	EXPECT_EQ(1U, wcrtomb(NULL, L'h', NULL));

	char bytes[MB_LEN_MAX];

	// wctomb and wcrtomb behave similarly for the null wide character.
	EXPECT_EQ(1, wctomb(bytes, L'\0'));
	EXPECT_EQ(1U, wcrtomb(bytes, L'\0', NULL));

	// ...and for regular characters.
	memset(bytes, 0, sizeof(bytes));
	EXPECT_EQ(1, wctomb(bytes, L'h'));
	EXPECT_EQ('h', bytes[0]);
	memset(bytes, 0, sizeof(bytes));
	EXPECT_EQ(1U, wcrtomb(bytes, L'h', NULL));
	EXPECT_EQ('h', bytes[0]);

	ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
	uselocale(LC_GLOBAL_LOCALE);

	// 1-byte UTF-8.
	memset(bytes, 0, sizeof(bytes));
	EXPECT_EQ(1U, wcrtomb(bytes, L'h', NULL));
	EXPECT_EQ('h', bytes[0]);
	// 2-byte UTF-8.
	memset(bytes, 0, sizeof(bytes));
	EXPECT_EQ(2U, wcrtomb(bytes, 0x00a2, NULL));
	EXPECT_EQ('\xc2', bytes[0]);
	EXPECT_EQ('\xa2', bytes[1]);
	// 3-byte UTF-8.
	memset(bytes, 0, sizeof(bytes));
	EXPECT_EQ(3U, wcrtomb(bytes, 0x20ac, NULL));
	EXPECT_EQ('\xe2', bytes[0]);
	EXPECT_EQ('\x82', bytes[1]);
	EXPECT_EQ('\xac', bytes[2]);
	// 4-byte UTF-8.
	memset(bytes, 0, sizeof(bytes));
	EXPECT_EQ(4U, wcrtomb(bytes, 0x24b62, NULL));
	EXPECT_EQ('\xf0', bytes[0]);
	EXPECT_EQ('\xa4', bytes[1]);
	EXPECT_EQ('\xad', bytes[2]);
	EXPECT_EQ('\xa2', bytes[3]);
	// Invalid code point.
	EXPECT_EQ(static_cast<size_t>(-1), wcrtomb(bytes, 0xffffffff, NULL));
	EXPECT_EQ(EILSEQ, errno);
	}

	TEST(wchar, wcstombs_wcrtombs) {
	const wchar_t chars[] = { L'h', L'e', L'l', L'l', L'o', 0 };
	const wchar_t bad_chars[] = { L'h', L'i', 0xffffffff, 0 };
	const wchar_t* src;
	char bytes[BUFSIZ];

	// Given a NULL destination, these functions count valid characters.
	EXPECT_EQ(5U, wcstombs(NULL, chars, 0));
	EXPECT_EQ(5U, wcstombs(NULL, chars, 4));
	EXPECT_EQ(5U, wcstombs(NULL, chars, 256));
	src = chars;
	EXPECT_EQ(5U, wcsrtombs(NULL, &src, 0, NULL));
	EXPECT_EQ(&chars[0], src);
	src = chars;
	EXPECT_EQ(5U, wcsrtombs(NULL, &src, 4, NULL));
	EXPECT_EQ(&chars[0], src);
	src = chars;
	EXPECT_EQ(5U, wcsrtombs(NULL, &src, 256, NULL));
	EXPECT_EQ(&chars[0], src);

	// An unrepresentable char just returns an error from wcstombs...
	errno = 0;
	EXPECT_EQ(static_cast<size_t>(-1), wcstombs(NULL, bad_chars, 0));
	EXPECT_EQ(EILSEQ, errno);
	errno = 0;
	EXPECT_EQ(static_cast<size_t>(-1), wcstombs(NULL, bad_chars, 256));
	EXPECT_EQ(EILSEQ, errno);

	// And wcsrtombs doesn't tell us where it got stuck because we didn't ask it
	// to actually convert anything...
	errno = 0;
	src = bad_chars;
	EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(NULL, &src, 0, NULL));
	EXPECT_EQ(&bad_chars[0], src);
	EXPECT_EQ(EILSEQ, errno);
	errno = 0;
	src = bad_chars;
	EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(NULL, &src, 256, NULL));
	EXPECT_EQ(&bad_chars[0], src);
	EXPECT_EQ(EILSEQ, errno);

	// Okay, now let's test actually converting something...
	memset(bytes, 'x', sizeof(bytes));
	EXPECT_EQ(0U, wcstombs(bytes, chars, 0));
	memset(bytes, 'x', sizeof(bytes));
	EXPECT_EQ(4U, wcstombs(bytes, chars, 4));
	bytes[5] = 0;
	EXPECT_STREQ("hellx", bytes);
	memset(bytes, 'x', sizeof(bytes));
	EXPECT_EQ(5U, wcstombs(bytes, chars, 256));
	EXPECT_STREQ("hello", bytes);
	memset(bytes, 'x', sizeof(bytes));
	EXPECT_EQ(5U, wcstombs(bytes, chars, 6));
	EXPECT_STREQ("hello", bytes);
	errno = 0;
	memset(bytes, 'x', sizeof(bytes));
	EXPECT_EQ(static_cast<size_t>(-1), wcstombs(bytes, bad_chars, 256));
	EXPECT_EQ(EILSEQ, errno);
	bytes[3] = 0;
	EXPECT_STREQ("hix", bytes);

	// wcsrtombs is a bit more informative...
	memset(bytes, 'x', sizeof(bytes));
	src = chars;
	EXPECT_EQ(0U, wcsrtombs(bytes, &src, 0, NULL));
	EXPECT_EQ(&chars[0], src); // No input consumed.
	EXPECT_EQ(EILSEQ, errno);

	memset(bytes, 'x', sizeof(bytes));
	src = chars;
	EXPECT_EQ(4U, wcsrtombs(bytes, &src, 4, NULL));
	EXPECT_EQ(&chars[4], src); // Some input consumed.
	EXPECT_EQ(EILSEQ, errno);
	bytes[5] = 0;
	EXPECT_STREQ("hellx", bytes);

	memset(bytes, 'x', sizeof(bytes));
	src = chars;
	EXPECT_EQ(5U, wcsrtombs(bytes, &src, 256, NULL));
	EXPECT_EQ(NULL, src); // All input consumed!
	EXPECT_EQ(EILSEQ, errno);
	EXPECT_STREQ("hello", bytes);

	memset(bytes, 'x', sizeof(bytes));
	src = chars;
	EXPECT_EQ(5U, wcsrtombs(bytes, &src, 6, NULL));
	EXPECT_EQ(NULL, src); // All input consumed.
	EXPECT_EQ(EILSEQ, errno);
	EXPECT_STREQ("hello", bytes);

	memset(bytes, 'x', sizeof(bytes));
	src = bad_chars;
	EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(bytes, &src, 256, NULL));
	EXPECT_EQ(&bad_chars[2], src);
	EXPECT_EQ(EILSEQ, errno);
	bytes[3] = 0;
	EXPECT_STREQ("hix", bytes);
	}

	TEST(wchar, limits) {
	ASSERT_LT(WCHAR_MIN, WCHAR_MAX);
	}

	TEST(wchar, wcsstr_wcswcs) {
	const wchar_t* haystack = L"matches hello world, not the second hello world";
	const wchar_t* empty_needle = L"";
	const wchar_t* good_needle = L"ll";
	const wchar_t* bad_needle = L"wort";

	ASSERT_EQ(haystack, wcsstr(haystack, empty_needle));
	ASSERT_EQ(&haystack[10], wcsstr(haystack, good_needle));
	ASSERT_EQ(NULL, wcsstr(haystack, bad_needle));

	ASSERT_EQ(haystack, wcswcs(haystack, empty_needle));
	ASSERT_EQ(&haystack[10], wcswcs(haystack, good_needle));
	ASSERT_EQ(NULL, wcswcs(haystack, bad_needle));
	}

	TEST(wchar, mbtowc) {
	wchar_t out[8];

	out[0] = 'x';
	ASSERT_EQ(0, mbtowc(out, "hello", 0));
	ASSERT_EQ('x', out[0]);

	ASSERT_EQ(0, mbtowc(out, "hello", 0));
	ASSERT_EQ(0, mbtowc(out, "", 0));
	ASSERT_EQ(1, mbtowc(out, "hello", 1));
	ASSERT_EQ(L'h', out[0]);

	ASSERT_EQ(0, mbtowc(NULL, "hello", 0));
	ASSERT_EQ(0, mbtowc(NULL, "", 0));
	ASSERT_EQ(1, mbtowc(NULL, "hello", 1));

	ASSERT_EQ(0, mbtowc(NULL, NULL, 0));
	}

	TEST(wchar, mbrtowc) {
	wchar_t out[8];

	out[0] = 'x';
	ASSERT_EQ(0U, mbrtowc(out, "hello", 0, NULL));
	ASSERT_EQ('x', out[0]);

	ASSERT_EQ(0U, mbrtowc(out, "hello", 0, NULL));
	ASSERT_EQ(0U, mbrtowc(out, "", 0, NULL));
	ASSERT_EQ(1U, mbrtowc(out, "hello", 1, NULL));
	ASSERT_EQ(L'h', out[0]);

	ASSERT_EQ(0U, mbrtowc(NULL, "hello", 0, NULL));
	ASSERT_EQ(0U, mbrtowc(NULL, "", 0, NULL));
	ASSERT_EQ(1U, mbrtowc(NULL, "hello", 1, NULL));

	ASSERT_EQ(0U, mbrtowc(NULL, NULL, 0, NULL));

	ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
	uselocale(LC_GLOBAL_LOCALE);

	// 1-byte UTF-8.
	ASSERT_EQ(1U, mbrtowc(out, "abcdef", 6, NULL));
	ASSERT_EQ(L'a', out[0]);
	// 2-byte UTF-8.
	ASSERT_EQ(2U, mbrtowc(out, "\xc2\xa2" "cdef", 6, NULL));
	ASSERT_EQ(0x00a2, out[0]);
	// 3-byte UTF-8.
	ASSERT_EQ(3U, mbrtowc(out, "\xe2\x82\xac" "def", 6, NULL));
	ASSERT_EQ(0x20ac, out[0]);
	// 4-byte UTF-8.
	ASSERT_EQ(4U, mbrtowc(out, "\xf0\xa4\xad\xa2" "ef", 6, NULL));
	ASSERT_EQ(0x24b62, out[0]);
	#if __BIONIC__ // glibc allows this.
	// Illegal 5-byte UTF-8.
	ASSERT_EQ(static_cast<size_t>(-1), mbrtowc(out, "\xf8\xa1\xa2\xa3\xa4" "f", 6, NULL));
	ASSERT_EQ(EILSEQ, errno);
	#endif
	// Illegal over-long sequence.
	ASSERT_EQ(static_cast<size_t>(-1), mbrtowc(out, "\xf0\x82\x82\xac" "ef", 6, NULL));
	ASSERT_EQ(EILSEQ, errno);
	}

	TEST(wchar, wcstod) {
	ASSERT_DOUBLE_EQ(1.23, wcstod(L"1.23", NULL));
	}

	TEST(wchar, wcstof) {
	ASSERT_FLOAT_EQ(1.23f, wcstof(L"1.23", NULL));
	}

	TEST(wchar, wcstol) {
	ASSERT_EQ(123L, wcstol(L"123", NULL, 0));
	}

	TEST(wchar, wcstoll) {
	ASSERT_EQ(123LL, wcstol(L"123", NULL, 0));
	}

	TEST(wchar, wcstold) {
	ASSERT_DOUBLE_EQ(1.23L, wcstold(L"1.23", NULL));
	}

	TEST(wchar, wcstoul) {
	ASSERT_EQ(123UL, wcstoul(L"123", NULL, 0));
	}

	TEST(wchar, wcstoull) {
	ASSERT_EQ(123ULL, wcstoul(L"123", NULL, 0));
	}

	TEST(wchar, mbsnrtowcs) {
	wchar_t dst[128];
	const char* s = "hello, world!";
	const char* src;

	memset(dst, 0, sizeof(dst));
	src = s;
	ASSERT_EQ(0U, mbsnrtowcs(dst, &src, 0, 0, NULL));

	memset(dst, 0, sizeof(dst));
	src = s;
	ASSERT_EQ(2U, mbsnrtowcs(dst, &src, 2, 123, NULL)); // glibc chokes on SIZE_MAX here.
	ASSERT_EQ(L'h', dst[0]);
	ASSERT_EQ(L'e', dst[1]);
	ASSERT_EQ(&s[2], src);

	memset(dst, 0, sizeof(dst));
	src = s;
	ASSERT_EQ(3U, mbsnrtowcs(dst, &src, SIZE_MAX, 3, NULL));
	ASSERT_EQ(L'h', dst[0]);
	ASSERT_EQ(L'e', dst[1]);
	ASSERT_EQ(L'l', dst[2]);
	ASSERT_EQ(&s[3], src);
	}