/*
* 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 <uchar.h>
#include <gtest/gtest.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdint.h>
#include "utils.h"
// Modern versions of UTF-8 (https://datatracker.ietf.org/doc/html/rfc3629 and
// newer) explicitly disallow code points beyond U+10FFFF, which exclude all 5-
// and 6-byte sequences. Earlier versions of UTF-8 allowed the wider range:
// https://datatracker.ietf.org/doc/html/rfc2279.
//
// Bionic's unicode implementation was written after the high values were
// excluded, so it has never supported them. Other implementations (at least
// as of glibc 2.36), do support those sequences.
#if defined (__ANDROID__) ||
defined (ANDROID_HOST_MUSL)
constexpr
bool kLibcRejectsOverLongUtf8Sequences =
true ;
#elif defined (__GLIBC__)
constexpr
bool kLibcRejectsOverLongUtf8Sequences =
false ;
#else
#error kLibcRejectsOverLongUtf8Sequences must be configured
for this platform
#endif
TEST(uchar, sizeof_uchar_t) {
EXPECT_EQ(
2 U,
sizeof (char16_t));
EXPECT_EQ(
4 U,
sizeof (char32_t));
}
TEST(uchar, start_state) {
// C23 does not appear to specify the behavior of the conversion functions if
// a state is reused before the character is completed. In the wchar.h section
// (7.31.6.3) it says:
//
// If an mbstate_t object has been altered by any of the functions
// described in this subclause, and is then used with a different
// multibyte character sequence, or in the other conversion direction, or
// with a different LC_CTYPE category setting than on earlier function
// calls, the behavior is undefined.
//
// But "described in this subclause" refers to the wchar.h functions, not the
// uchar.h ones.
//
// Since C has no opinion, we need to make a choice. While no caller should
// ever do this (what does it mean to begin decoding a UTF-32 character while
// still in the middle of a UTF-8 sequence?), considering that a decoding
// error seems the least surprising. Bionic and glibc both have that behavior.
// musl ignores the state (it also doesn't make much sense to read the state
// when the entire conversion completes in a single call) and decodes the
// UTF-32 character.
#if !
defined (ANDROID_HOST_MUSL)
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char out[MB_LEN_MAX];
mbstate_t ps = {};
EXPECT_EQ(
static_cast <size_t>(-
2 ), mbrtoc32(nullptr,
"\xc2" ,
1 , &ps));
EXPECT_ERRNO_FAILURE(EILSEQ,
static_cast <size_t>(-
1 ), c32rtomb(out,
0 x00a2, &ps));
// Similarly (but not in compliance with the standard afaict), musl seems to
// ignore the state entirely for the UTF-32 functions rather than reset it.
// If the first argument to c32rtomb is nullptr or the second is L'\0' the shift
// state should be reset.
ps = {};
EXPECT_EQ(
static_cast <size_t>(-
2 ), mbrtoc32(nullptr,
"\xc2" ,
1 , &ps));
EXPECT_EQ(
1 U, c32rtomb(nullptr,
0 x00a2, &ps));
EXPECT_TRUE(mbsinit(&ps));
ps = {};
EXPECT_EQ(
static_cast <size_t>(-
2 ), mbrtoc32(nullptr,
"\xf0\xa4" ,
1 , &ps));
EXPECT_EQ(
1 U, c32rtomb(out, L
'\0' , &ps));
EXPECT_TRUE(mbsinit(&ps));
#endif
}
TEST(uchar, c16rtomb_null_out) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
EXPECT_EQ(
1 U, c16rtomb(nullptr, L
'\0' , nullptr));
EXPECT_EQ(
1 U, c16rtomb(nullptr, L
'h' , nullptr));
}
TEST(uchar, c16rtomb_null_char) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char bytes[MB_LEN_MAX];
EXPECT_EQ(
1 U, c16rtomb(bytes, L
'\0' , nullptr));
}
TEST(uchar, c16rtomb) {
char bytes[MB_LEN_MAX];
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
1 U, c16rtomb(bytes, L
'h' , nullptr));
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(
1 U, c16rtomb(bytes, L
'h' , nullptr));
EXPECT_EQ(
'h' , bytes[
0 ]);
// 2-byte UTF-8.
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
2 U, c16rtomb(bytes,
0 x00a2, nullptr));
EXPECT_EQ(
'\xc2' , bytes[
0 ]);
EXPECT_EQ(
'\xa2' , bytes[
1 ]);
// 3-byte UTF-8.
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
3 U, c16rtomb(bytes,
0 x20ac, nullptr));
EXPECT_EQ(
'\xe2' , bytes[
0 ]);
EXPECT_EQ(
'\x82' , bytes[
1 ]);
EXPECT_EQ(
'\xac' , bytes[
2 ]);
// 4-byte UTF-8 from a surrogate pair...
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
0 U, c16rtomb(bytes,
0 xdbea, nullptr));
EXPECT_EQ(
4 U, c16rtomb(bytes,
0 xdfcd, nullptr));
EXPECT_EQ(
'\xf4' , bytes[
0 ]);
EXPECT_EQ(
'\x8a' , bytes[
1 ]);
EXPECT_EQ(
'\xaf' , bytes[
2 ]);
EXPECT_EQ(
'\x8d' , bytes[
3 ]);
}
TEST(uchar, c16rtomb_invalid) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char bytes[MB_LEN_MAX];
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
static_cast <size_t>(-
1 ), c16rtomb(bytes,
0 xdfcd, nullptr));
EXPECT_EQ(
0 U, c16rtomb(bytes,
0 xdbea, nullptr));
EXPECT_EQ(
static_cast <size_t>(-
1 ), c16rtomb(bytes,
0 xdbea, nullptr));
}
TEST(uchar, mbrtoc16_null) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
ASSERT_EQ(
0 U, mbrtoc16(nullptr, nullptr,
0 , nullptr));
}
TEST(uchar, mbrtoc16_zero_len) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char16_t out;
out = L
'x' ;
EXPECT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"hello" ,
0 , nullptr));
EXPECT_EQ(L
'x' , out);
EXPECT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"hello" ,
0 , nullptr));
EXPECT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"" ,
0 , nullptr));
EXPECT_EQ(
1 U, mbrtoc16(&out,
"hello" ,
1 , nullptr));
EXPECT_EQ(L
'h' , out);
}
TEST(uchar, mbrtoc16) {
char16_t out;
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
// 1-byte UTF-8.
ASSERT_EQ(
1 U, mbrtoc16(&out,
"abcdef" ,
6 , nullptr));
ASSERT_EQ(L
'a' , out);
// 2-byte UTF-8.
ASSERT_EQ(
2 U, mbrtoc16(&out,
"\xc2\xa2" "cdef" ,
6 , nullptr));
ASSERT_EQ(
static_cast <char16_t>(
0 x00a2), out);
// 3-byte UTF-8.
ASSERT_EQ(
3 U, mbrtoc16(&out,
"\xe2\x82\xac" "def" ,
6 , nullptr));
ASSERT_EQ(
static_cast <char16_t>(
0 x20ac), out);
// 4-byte UTF-8 will be returned as a surrogate pair...
ASSERT_EQ(
4 U, mbrtoc16(&out,
"\xf4\x8a\xaf\x8d" ,
6 , nullptr));
ASSERT_EQ(
static_cast <char16_t>(
0 xdbea), out);
ASSERT_EQ(
static_cast <size_t>(-
3 ), mbrtoc16(&out,
"\xf4\x8a\xaf\x8d"
"ef" ,
6 , nullptr));
ASSERT_EQ(
static_cast <char16_t>(
0 xdfcd), out);
}
TEST(uchar, mbrtoc16_long_sequences) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char16_t out = u
'\0' ;
errno =
0 ;
auto result = mbrtoc16(&out,
"\xf8\xa1\xa2\xa3\xa4" ,
5 , nullptr);
if (kLibcRejectsOverLongUtf8Sequences) {
EXPECT_EQ(
static_cast <size_t>(-
1 ), result);
EXPECT_ERRNO(EILSEQ);
EXPECT_EQ(u
'\0' , out);
}
else {
EXPECT_EQ(
5 U, result);
EXPECT_ERRNO(
0 );
EXPECT_EQ(u
'\uf94a' , out);
}
}
TEST(uchar, mbrtoc16_reserved_range) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char16_t out = u
'\0' ;
EXPECT_ERRNO_FAILURE(EILSEQ,
static_cast <size_t>(-
1 ), mbrtoc16(&out,
"\xf0\x80\xbf\xbf" ,
6 , nullptr));
EXPECT_EQ(u
'\0' , out);
}
TEST(uchar, mbrtoc16_beyond_range) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
errno =
0 ;
char16_t out = u
'\0' ;
auto result = mbrtoc16(&out,
"\xf5\x80\x80\x80" ,
6 , nullptr);
if (kLibcRejectsOverLongUtf8Sequences) {
EXPECT_EQ(
static_cast <size_t>(-
1 ), result);
EXPECT_EQ(u
'\0' , out);
EXPECT_ERRNO(EILSEQ);
}
else {
EXPECT_EQ(
4 U, result);
EXPECT_EQ(u
'\xdcc0' , out);
EXPECT_ERRNO(
0 );
}
}
void test_mbrtoc16_incomplete(mbstate_t* ps) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char16_t out;
// 2-byte UTF-8.
ASSERT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"\xc2" ,
1 , ps));
ASSERT_EQ(
1 U, mbrtoc16(&out,
"\xa2" "cdef" ,
5 , ps));
ASSERT_EQ(
static_cast <char16_t>(
0 x00a2), out);
ASSERT_TRUE(mbsinit(ps));
// 3-byte UTF-8.
ASSERT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"\xe2" ,
1 , ps));
ASSERT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"\x82" ,
1 , ps));
ASSERT_EQ(
1 U, mbrtoc16(&out,
"\xac" "def" ,
4 , ps));
ASSERT_EQ(
static_cast <char16_t>(
0 x20ac), out);
ASSERT_TRUE(mbsinit(ps));
// 4-byte UTF-8.
ASSERT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"\xf4" ,
1 , ps));
ASSERT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"\x8a\xaf" ,
2 , ps));
ASSERT_EQ(
1 U, mbrtoc16(&out,
"\x8d"
"ef" ,
3 , ps));
ASSERT_EQ(
static_cast <char16_t>(
0 xdbea), out);
ASSERT_EQ(
static_cast <size_t>(-
3 ), mbrtoc16(&out,
"\x80"
"ef" ,
3 , ps));
ASSERT_EQ(
static_cast <char16_t>(
0 xdfcd), out);
ASSERT_TRUE(mbsinit(ps));
// Invalid 2-byte
ASSERT_EQ(
static_cast <size_t>(-
2 ), mbrtoc16(&out,
"\xc2" ,
1 , ps));
errno =
0 ;
ASSERT_EQ(
static_cast <size_t>(-
1 ), mbrtoc16(&out,
"\x20" "cdef" ,
5 , ps));
ASSERT_ERRNO(EILSEQ);
}
TEST(uchar, mbrtoc16_incomplete) {
ASSERT_STREQ(
"C.UTF-8" , setlocale(LC_CTYPE,
"C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
mbstate_t ps = {};
test_mbrtoc16_incomplete(&ps);
test_mbrtoc16_incomplete(nullptr);
}
TEST(uchar, c32rtomb) {
EXPECT_EQ(
1 U, c32rtomb(nullptr, L
'\0' , nullptr));
EXPECT_EQ(
1 U, c32rtomb(nullptr, L
'h' , nullptr));
char bytes[MB_LEN_MAX];
memset(bytes,
1 ,
sizeof (bytes));
EXPECT_EQ(
1 U, c32rtomb(bytes, L
'\0' , nullptr));
EXPECT_EQ(
'\0' , bytes[
0 ]);
EXPECT_EQ(
'\x01' , bytes[
1 ]);
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
1 U, c32rtomb(bytes, L
'h' , nullptr));
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(
1 U, c32rtomb(bytes, L
'h' , nullptr));
EXPECT_EQ(
'h' , bytes[
0 ]);
// 2-byte UTF-8.
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
2 U, c32rtomb(bytes,
0 x00a2, nullptr));
EXPECT_EQ(
'\xc2' , bytes[
0 ]);
EXPECT_EQ(
'\xa2' , bytes[
1 ]);
// 3-byte UTF-8.
memset(bytes,
0 ,
sizeof (bytes));
EXPECT_EQ(
3 U, c32rtomb(bytes,
0 x20ac, nullptr));
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(
4 U, c32rtomb(bytes,
0 x24b62, nullptr));
EXPECT_EQ(
'\xf0' , bytes[
0 ]);
EXPECT_EQ(
'\xa4' , bytes[
1 ]);
EXPECT_EQ(
'\xad' , bytes[
2 ]);
EXPECT_EQ(
'\xa2' , bytes[
3 ]);
// Invalid code point.
EXPECT_ERRNO_FAILURE(EILSEQ,
static_cast <size_t>(-
1 ), c32rtomb(bytes,
0 xffffffff, null
ptr));
}
TEST(uchar, mbrtoc32_valid_non_characters) {
ASSERT_STREQ("C.UTF-8" , setlocale(LC_CTYPE, "C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char32_t out[8 ] = {};
ASSERT_EQ(3 U, mbrtoc32(out, "\xef\xbf\xbe" , 3 , nullptr));
ASSERT_EQ(0 xfffeU, out[0 ]);
ASSERT_EQ(3 U, mbrtoc32(out, "\xef\xbf\xbf" , 3 , nullptr));
ASSERT_EQ(0 xffffU, out[0 ]);
}
TEST(uchar, mbrtoc32_out_of_range) {
ASSERT_STREQ("C.UTF-8" , setlocale(LC_CTYPE, "C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char32_t out = U'\0' ;
errno = 0 ;
auto result = mbrtoc32(&out, "\xf5\x80\x80\x80" , 4 , nullptr);
if (kLibcRejectsOverLongUtf8Sequences) {
EXPECT_EQ(static_cast <size_t>(-1 ), result);
EXPECT_ERRNO(EILSEQ);
EXPECT_EQ(U'\0' , out);
} else {
EXPECT_EQ(4 U, result);
EXPECT_ERRNO(0 );
EXPECT_EQ(U'\x140000' , out);
}
}
TEST(uchar, mbrtoc32) {
char32_t out[8 ];
out[0 ] = L'x' ;
EXPECT_EQ(static_cast <size_t>(-2 ), mbrtoc32(out, "hello" , 0 , nullptr));
EXPECT_EQ(static_cast <char32_t>(L'x' ), out[0 ]);
EXPECT_EQ(static_cast <size_t>(-2 ), mbrtoc32(out, "hello" , 0 , nullptr));
EXPECT_EQ(static_cast <size_t>(-2 ), mbrtoc32(out, "" , 0 , nullptr));
EXPECT_EQ(1 U, mbrtoc32(out, "hello" , 1 , nullptr));
EXPECT_EQ(static_cast <char32_t>(L'h' ), out[0 ]);
EXPECT_EQ(static_cast <size_t>(-2 ), mbrtoc32(nullptr, "hello" , 0 , nullptr));
EXPECT_EQ(static_cast <size_t>(-2 ), mbrtoc32(nullptr, "" , 0 , nullptr));
EXPECT_EQ(1 U, mbrtoc32(nullptr, "hello" , 1 , nullptr));
EXPECT_EQ(0 U, mbrtoc32(nullptr, nullptr, 0 , nullptr));
ASSERT_STREQ("C.UTF-8" , setlocale(LC_CTYPE, "C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
// 1-byte UTF-8.
EXPECT_EQ(1 U, mbrtoc32(out, "abcdef" , 6 , nullptr));
EXPECT_EQ(static_cast <char32_t>(L'a' ), out[0 ]);
// 2-byte UTF-8.
EXPECT_EQ(2 U, mbrtoc32(out,
"\xc2\xa2"
"cdef" ,
6 , nullptr));
EXPECT_EQ(static_cast <char32_t>(0 x00a2), out[0 ]);
// 3-byte UTF-8.
EXPECT_EQ(3 U, mbrtoc32(out,
"\xe2\x82\xac"
"def" ,
6 , nullptr));
EXPECT_EQ(static_cast <char32_t>(0 x20ac), out[0 ]);
// 4-byte UTF-8.
EXPECT_EQ(4 U, mbrtoc32(out,
"\xf0\xa4\xad\xa2"
"ef" ,
6 , nullptr));
EXPECT_EQ(static_cast <char32_t>(0 x24b62), out[0 ]);
#if defined (__BIONIC__) // glibc allows this.
// Illegal 5-byte UTF-8.
EXPECT_ERRNO_FAILURE(EILSEQ,
static_cast <size_t>(-1 ), mbrtoc32(out,
"\xf8\xa1\xa2\xa3\xa4"
"f" ,
6 , nullptr));
#endif
// Illegal over-long sequence.
EXPECT_ERRNO_FAILURE(EILSEQ,
static_cast <size_t>(-1 ), mbrtoc32(out,
"\xf0\x82\x82\xac"
"ef" ,
6 , nullptr));
}
void test_mbrtoc32_incomplete(mbstate_t* ps) {
ASSERT_STREQ("C.UTF-8" , setlocale(LC_CTYPE, "C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
char32_t out;
// 2-byte UTF-8.
ASSERT_EQ(static_cast <size_t>(-2 ), mbrtoc32(&out, "\xc2" , 1 , ps));
ASSERT_EQ(1 U, mbrtoc32(&out, "\xa2" "cdef" , 5 , ps));
ASSERT_EQ(static_cast <char32_t>(0 x00a2), out);
ASSERT_TRUE(mbsinit(ps));
// 3-byte UTF-8.
ASSERT_EQ(static_cast <size_t>(-2 ), mbrtoc32(&out, "\xe2" , 1 , ps));
ASSERT_EQ(static_cast <size_t>(-2 ), mbrtoc32(&out, "\x82" , 1 , ps));
ASSERT_EQ(1 U, mbrtoc32(&out, "\xac" "def" , 4 , ps));
ASSERT_EQ(static_cast <char32_t>(0 x20ac), out);
ASSERT_TRUE(mbsinit(ps));
// 4-byte UTF-8.
ASSERT_EQ(static_cast <size_t>(-2 ), mbrtoc32(&out, "\xf0" , 1 , ps));
ASSERT_EQ(static_cast <size_t>(-2 ), mbrtoc32(&out, "\xa4\xad" , 2 , ps));
ASSERT_EQ(1 U, mbrtoc32(&out, "\xa2" "ef" , 3 , ps));
ASSERT_EQ(static_cast <char32_t>(0 x24b62), out);
ASSERT_TRUE(mbsinit(ps));
// Invalid 2-byte
ASSERT_EQ(static_cast <size_t>(-2 ), mbrtoc32(&out, "\xc2" , 1 , ps));
errno = 0 ;
ASSERT_EQ(static_cast <size_t>(-1 ), mbrtoc32(&out, "\x20" "cdef" , 5 , ps));
ASSERT_ERRNO(EILSEQ);
}
TEST(uchar, mbrtoc32_incomplete) {
ASSERT_STREQ("C.UTF-8" , setlocale(LC_CTYPE, "C.UTF-8" ));
uselocale(LC_GLOBAL_LOCALE);
mbstate_t ps = {};
test_mbrtoc32_incomplete(&ps);
test_mbrtoc32_incomplete(nullptr);
}
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