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AK: Add StringView::ends_with function

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This commit is contained in:
Shannon Booth 2019-12-30 01:44:30 +13:00 • committed by Andreas Kling
parent 27df4eb43d
commit 24bc674d94
3 changed files with 22 additions and 0 deletions
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11
AK/StringView.cpp
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@ -92,6 +92,17 @@ bool StringView::starts_with(const StringView& str) const
return !memcmp(characters_without_null_termination(), str.characters_without_null_termination(), str.length()); return !memcmp(characters_without_null_termination(), str.characters_without_null_termination(), str.length());
} }
bool StringView::ends_with(const StringView& str) const
{
if (str.is_empty())
return true;
if (is_empty())
return false;
if (str.length() > length())
return false;
return !memcmp(characters_without_null_termination() + length() - str.length(), str.characters_without_null_termination(), str.length());
}
StringView StringView::substring_view(size_t start, size_t length) const StringView StringView::substring_view(size_t start, size_t length) const
{ {
if (!length) if (!length)

1
AK/StringView.h
View file

@ -42,6 +42,7 @@ public:
unsigned hash() const; unsigned hash() const;
bool starts_with(const StringView&) const; bool starts_with(const StringView&) const;
bool ends_with(const StringView&) const;
StringView substring_view(size_t start, size_t length) const; StringView substring_view(size_t start, size_t length) const;
Vector<StringView> split_view(char, bool keep_empty = false) const; Vector<StringView> split_view(char, bool keep_empty = false) const;

10
AK/Tests/TestStringView.cpp
View file

@ -42,6 +42,16 @@ TEST_CASE(starts_with)
EXPECT(!test_string_view.starts_with("DEF")); EXPECT(!test_string_view.starts_with("DEF"));
} }
TEST_CASE(ends_with)
{
String test_string = "ABCDEF";
StringView test_string_view = test_string.view();
EXPECT(test_string_view.ends_with("DEF"));
EXPECT(test_string_view.ends_with("ABCDEF"));
EXPECT(!test_string_view.ends_with("ABCDE"));
EXPECT(!test_string_view.ends_with("ABCDEFG"));
}
TEST_CASE(lines) TEST_CASE(lines)
{ {
String test_string = "a\nb\r\nc\rd"; String test_string = "a\nb\r\nc\rd";