beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-25 00:50:22 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

AK: Add generation of roman numerals to AK::String

Browse source 
We now can generate roman numbers using String::roman_number_from()
similar to String::bijective_base_from().
This commit is contained in:
Tobias Christiansen 2021-07-04 17:15:27 +02:00 committed by Andreas Kling
parent 24e122590c
commit 87033ce7d1
Notes: sideshowbarker 2024-07-18 10:27:22 +09:00 
Author: https://github.com/TobyAsE
Commit: https://github.com/SerenityOS/serenity/commit/87033ce7d1b
Pull-request: https://github.com/SerenityOS/serenity/pull/8434
Reviewed-by: https://github.com/MaxWipfli ✅
2 changed files with 54 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
AK/String.cpp
View file

@ -273,6 +273,59 @@ String String::bijective_base_from(size_t value, unsigned base, StringView map)
return String { ReadonlyBytes(buffer.data(), i) };
}
String String::roman_number_from(size_t value)
{
if (value > 3999)
return String::number(value);
StringBuilder builder;
while (value > 0) {
if (value >= 1000) {
builder.append('M');
value -= 1000;
} else if (value >= 900) {
builder.append("CM"sv);
value -= 900;
} else if (value >= 500) {
builder.append('D');
value -= 500;
} else if (value >= 400) {
builder.append("CD"sv);
value -= 400;
} else if (value >= 100) {
builder.append('C');
value -= 100;
} else if (value >= 90) {
builder.append("XC"sv);
value -= 90;
} else if (value >= 50) {
builder.append('L');
value -= 50;
} else if (value >= 40) {
builder.append("XL"sv);
value -= 40;
} else if (value >= 10) {
builder.append('X');
value -= 10;
} else if (value == 9) {
builder.append("IX"sv);
value -= 9;
} else if (value >= 5 && value <= 8) {
builder.append('V');
value -= 5;
} else if (value == 4) {
builder.append("IV"sv);
value -= 4;
} else if (value <= 3) {
builder.append('I');
value -= 1;
}
}
return builder.to_string();
}
bool String::matches(const StringView& mask, Vector<MaskSpan>& mask_spans, CaseSensitivity case_sensitivity) const
{
return StringUtils::matches(*this, mask, case_sensitivity, &mask_spans);

1
AK/String.h
View file

@ -99,6 +99,7 @@ public:
[[nodiscard]] static String repeated(const StringView&, size_t count);
[[nodiscard]] static String bijective_base_from(size_t value, unsigned base = 26, StringView map = {});
[[nodiscard]] static String roman_number_from(size_t value);
template<class SeparatorType, class CollectionType>
[[nodiscard]] static String join(const SeparatorType& separator, const CollectionType& collection)