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AK: Add StringView::find_last_not

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Undefine 2022-09-30 21:19:53 +02:00 committed by Andrew Kaster
parent 48aea321c5
commit 9718667bcf
Notes: sideshowbarker 2024-07-17 08:37:36 +09:00 
Author: https://github.com/cqundefine
Commit: https://github.com/SerenityOS/serenity/commit/9718667bcf
Pull-request: https://github.com/SerenityOS/serenity/pull/15278
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/Quaker762
Reviewed-by: https://github.com/bgianfo
Reviewed-by: https://github.com/timschumi
3 changed files with 11 additions and 0 deletions
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9
AK/StringUtils.cpp
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@ -388,6 +388,15 @@ Optional<size_t> find_last(StringView haystack, char needle)
return {};
}
Optional<size_t> find_last_not(StringView haystack, char needle)
{
for (size_t i = haystack.length(); i > 0; --i) {
if (haystack[i - 1] != needle)
return i - 1;
}
return {};
}
Vector<size_t> find_all(StringView haystack, StringView needle)
{
Vector<size_t> positions;

1
AK/StringUtils.h
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@ -74,6 +74,7 @@ StringView trim_whitespace(StringView string, TrimMode mode);
Optional<size_t> find(StringView haystack, char needle, size_t start = 0);
Optional<size_t> find(StringView haystack, StringView needle, size_t start = 0);
Optional<size_t> find_last(StringView haystack, char needle);
Optional<size_t> find_last_not(StringView haystack, char needle);
Vector<size_t> find_all(StringView haystack, StringView needle);
enum class SearchDirection {
Forward,

1
AK/StringView.h
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@ -107,6 +107,7 @@ public:
}
[[nodiscard]] Optional<size_t> find(StringView needle, size_t start = 0) const { return StringUtils::find(*this, needle, start); }
[[nodiscard]] Optional<size_t> find_last(char needle) const { return StringUtils::find_last(*this, needle); }
[[nodiscard]] Optional<size_t> find_last_not(char needle) const { return StringUtils::find_last_not(*this, needle); }
// FIXME: Implement find_last(StringView) for API symmetry.
[[nodiscard]] Vector<size_t> find_all(StringView needle) const;