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LibC: Implement wcsnrtombs

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Tim Schumacher 2021-10-22 00:57:44 +02:00 committed by Brian Gianforcaro
parent e618602433
commit 552ae77f0d
Notes: sideshowbarker 2024-07-18 02:03:49 +09:00 
Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/552ae77f0dd
Pull-request: https://github.com/SerenityOS/serenity/pull/10569
2 changed files with 40 additions and 5 deletions
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26
Tests/LibC/TestWchar.cpp
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@ -364,6 +364,32 @@ TEST_CASE(wcsrtombs)
EXPECT_EQ(src, nullptr);
}
TEST_CASE(wcsnrtombs)
{
mbstate_t state = {};
const wchar_t good_chars[] = { L'\U0001F41E', L'\U0001F41E', L'\0' };
const wchar_t* src;
size_t ret = 0;
// Convert nothing.
src = good_chars;
ret = wcsnrtombs(nullptr, &src, 0, 0, &state);
EXPECT_EQ(ret, 0ul);
EXPECT_EQ(src, good_chars);
// Convert one wide char.
src = good_chars;
ret = wcsnrtombs(nullptr, &src, 1, 0, &state);
EXPECT_EQ(ret, 4ul);
EXPECT_EQ(src, good_chars + 1);
// Encounter a null character.
src = good_chars;
ret = wcsnrtombs(nullptr, &src, 4, 0, &state);
EXPECT_EQ(ret, 8ul);
EXPECT_EQ(src, nullptr);
}
TEST_CASE(mbsrtowcs)
{
mbstate_t state = {};

19
Userland/Libraries/LibC/wchar.cpp
View file

@ -488,7 +488,7 @@ int wcwidth(wchar_t wc)
return 1;
}
size_t wcsrtombs(char* dest, const wchar_t** src, size_t len, mbstate_t* ps)
size_t wcsnrtombs(char* dest, const wchar_t** src, size_t nwc, size_t len, mbstate_t* ps)
{
static mbstate_t _anonymous_state = {};
@ -496,7 +496,8 @@ size_t wcsrtombs(char* dest, const wchar_t** src, size_t len, mbstate_t* ps)
ps = &_anonymous_state;
size_t written = 0;
while (true) {
size_t read = 0;
while (read < nwc) {
size_t ret = 0;
char buf[MB_LEN_MAX];
@ -526,8 +527,11 @@ size_t wcsrtombs(char* dest, const wchar_t** src, size_t len, mbstate_t* ps)
}
*src += 1;
read += 1;
written += ret;
}
return written;
}
size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps)
@ -573,10 +577,15 @@ int wmemcmp(const wchar_t* s1, const wchar_t* s2, size_t n)
return 0;
}
size_t wcsnrtombs(char*, const wchar_t**, size_t, size_t, mbstate_t*)
size_t wcsrtombs(char* dest, const wchar_t** src, size_t len, mbstate_t* ps)
{
dbgln("FIXME: Implement wcsnrtombs()");
TODO();
static mbstate_t anonymous_state = {};
if (ps == nullptr)
ps = &anonymous_state;
// SIZE_MAX is as close as we are going to get to "unlimited".
return wcsnrtombs(dest, src, SIZE_MAX, len, ps);
}
size_t mbsnrtowcs(wchar_t*, const char**, size_t, size_t, mbstate_t*)