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AK: Add LexicalPath::relative_path

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Itamar 2021-02-20 16:34:31 +02:00 committed by Andreas Kling
parent 50f887c9d5
commit 7ecb21afa7
Notes: sideshowbarker 2024-07-18 22:06:48 +09:00 
Author: https://github.com/itamar8910
Commit: https://github.com/SerenityOS/serenity/commit/7ecb21afa72
Pull-request: https://github.com/SerenityOS/serenity/pull/5424
Reviewed-by: https://github.com/awesomekling
2 changed files with 16 additions and 0 deletions
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15
AK/LexicalPath.cpp
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@ -119,4 +119,19 @@ String LexicalPath::canonicalized_path(const StringView& path)
return LexicalPath(path).string();
}
String LexicalPath::relative_path(const String absolute_path, const String& prefix)
{
if (!LexicalPath { absolute_path }.is_absolute() || !LexicalPath { prefix }.is_absolute())
return {};
if (!absolute_path.starts_with(prefix))
return absolute_path;
size_t prefix_length = LexicalPath { prefix }.string().length() + 1;
if (prefix_length >= absolute_path.length())
return {};
return absolute_path.substring(prefix_length);
}
}

1
AK/LexicalPath.h
View file

@ -50,6 +50,7 @@ public:
bool has_extension(const StringView&) const;
static String canonicalized_path(const StringView&);
static String relative_path(const String absolute_path, const String& prefix);
private:
void canonicalize();