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/*
* 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 <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.
bytes[0] = 'x';
EXPECT_EQ(1, wctomb(bytes, L'h'));
EXPECT_EQ('h', bytes[0]);
bytes[0] = 'x';
EXPECT_EQ(1U, wcrtomb(bytes, L'h', NULL));
EXPECT_EQ('h', bytes[0]);
}
TEST(wchar, wcstombs_wcrtombs) {
wchar_t chars[] = { L'h', L'e', L'l', L'l', L'o', 0 };
wchar_t bad_chars[] = { L'h', L'i', 666, 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);
}
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