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LibC: Implement wcsftime using a makeshift solution

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Tim Schumacher 2022-06-22 16:07:50 +02:00 • committed by Linus Groh
parent a79796ea4a
commit ffb95bace4
1 changed files with 35 additions and 7 deletions
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42
Userland/Libraries/LibC/wchar.cpp
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@ -1,14 +1,17 @@
/* /*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, Tim Schumacher <timschumi@serenityos.org>
* *
* SPDX-License-Identifier: BSD-2-Clause * SPDX-License-Identifier: BSD-2-Clause
*/ */
#include <AK/Assertions.h> #include <AK/Assertions.h>
#include <AK/Format.h> #include <AK/Format.h>
#include <AK/ScopeGuard.h>
#include <AK/UnicodeUtils.h> #include <AK/UnicodeUtils.h>
#include <errno.h> #include <errno.h>
#include <string.h> #include <string.h>
#include <time.h>
#include <wchar.h> #include <wchar.h>
static unsigned int mbstate_expected_bytes(mbstate_t* state) static unsigned int mbstate_expected_bytes(mbstate_t* state)
@ -687,13 +690,38 @@ size_t wcsspn(wchar_t const* wcs, wchar_t const* accept)
} }
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcsftime.html // https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcsftime.html
size_t wcsftime(wchar_t* __restrict wcs, size_t maxsize, wchar_t const* __restrict format, const struct tm* __restrict timeptr) size_t wcsftime(wchar_t* destination, size_t maxsize, wchar_t const* format, const struct tm* tm)
{ {
(void)wcs; // FIXME: Add actual wide char support for this.
(void)maxsize; char* ascii_format = static_cast<char*>(malloc(wcslen(format) + 1));
(void)format; char* ascii_destination = static_cast<char*>(malloc(maxsize));
(void)timeptr;
dbgln("FIXME: Implement wcsftime()"); VERIFY(ascii_format && ascii_destination);
TODO();
// These are copied by value because we will change the pointers without rolling them back.
ScopeGuard free_ascii = [ascii_format, ascii_destination] {
free(ascii_format);
free(ascii_destination);
};
char* ascii_format_copy = ascii_format;
do {
VERIFY(*format <= 0x7f);
*ascii_format_copy++ = static_cast<char>(*format);
} while (*format++ != L'\0');
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
size_t ret = strftime(ascii_destination, maxsize, ascii_format, tm);
#pragma GCC diagnostic pop
if (ret == 0)
return 0;
do {
*destination++ = *ascii_destination;
} while (*ascii_destination++ != '\0');
return ret;
} }
} }