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AK: Implement a UTF-16 UnixDateTime stringifier

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This commit is contained in:
Timothy Flynn 2025-07-26 08:01:09 -04:00 • committed by Andreas Kling
commit 96e75a023b
Notes: github-actions[bot] 2025-07-28 10:26:56 +00:00
2 changed files with 27 additions and 6 deletions
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30
AK/Time.cpp
View file

@ -10,6 +10,7 @@
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <AK/Time.h>
#include <AK/Utf16String.h>
#ifdef AK_OS_WINDOWS
# include <AK/Windows.h>
@ -310,7 +311,7 @@ UnixDateTime UnixDateTime::now_coarse()
return UnixDateTime { now_time_from_clock(CLOCK_REALTIME_COARSE) };
}
ErrorOr<String> UnixDateTime::to_string(StringView format, LocalTime local_time) const
ErrorOr<void> UnixDateTime::to_string_impl(StringBuilder& builder, StringView format, LocalTime local_time) const
{
struct tm tm;
@ -320,15 +321,16 @@ ErrorOr<String> UnixDateTime::to_string(StringView format, LocalTime local_time)
else
(void)gmtime_r(&timestamp, &tm);
StringBuilder builder;
size_t const format_len = format.length();
for (size_t i = 0; i < format_len; ++i) {
if (format[i] != '%') {
TRY(builder.try_append(format[i]));
} else {
if (++i == format_len)
return String {};
if (++i == format_len) {
builder.clear();
return {};
}
switch (format[i]) {
case 'a':
@ -452,7 +454,7 @@ ErrorOr<String> UnixDateTime::to_string(StringView format, LocalTime local_time)
break;
case 'Z': {
auto const* timezone_name = tzname[tm.tm_isdst == 0 ? 0 : 1];
TRY(builder.try_append({ timezone_name, strlen(timezone_name) }));
TRY(builder.try_append(StringView { timezone_name, strlen(timezone_name) }));
break;
}
case '%':
@ -466,12 +468,28 @@ ErrorOr<String> UnixDateTime::to_string(StringView format, LocalTime local_time)
}
}
return {};
}
ErrorOr<String> UnixDateTime::to_string(StringView format, LocalTime local_time) const
{
StringBuilder builder;
TRY(to_string_impl(builder, format, local_time));
return builder.to_string();
}
Utf16String UnixDateTime::to_utf16_string(StringView format, LocalTime local_time) const
{
StringBuilder builder(StringBuilder::Mode::UTF16);
MUST(to_string_impl(builder, format, local_time));
return builder.to_utf16_string();
}
ByteString UnixDateTime::to_byte_string(StringView format, LocalTime local_time) const
{
return MUST(to_string(format, local_time)).to_byte_string();
StringBuilder builder;
MUST(to_string_impl(builder, format, local_time));
return builder.to_byte_string();
}
}

3
AK/Time.h
View file

@ -472,6 +472,7 @@ public:
// %+: ignore until next '%'
// %%: require character '%'
ErrorOr<String> to_string(StringView format = "%Y-%m-%d %H:%M:%S"sv, LocalTime = LocalTime::Yes) const;
Utf16String to_utf16_string(StringView format = "%Y-%m-%d %H:%M:%S"sv, LocalTime = LocalTime::Yes) const;
ByteString to_byte_string(StringView format = "%Y-%m-%d %H:%M:%S"sv, LocalTime = LocalTime::Yes) const;
// Offsetting a UNIX time by a duration yields another UNIX time.
@ -506,6 +507,8 @@ private:
: Detail::UnawareTime(offset)
{
}
ErrorOr<void> to_string_impl(StringBuilder&, StringView format, LocalTime) const;
};
// Monotonic time represents time returned from the CLOCK_MONOTONIC clock, which has an arbitrary fixed reference point.