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AK: Add an overload of String::find_byte_offset for StringView

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Timothy Flynn 2023-01-27 10:17:34 -05:00 • committed by Linus Groh
parent 38b4e938b7
commit c35b1371a3
3 changed files with 55 additions and 2 deletions
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16
AK/String.cpp
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@ -8,6 +8,7 @@
#include <AK/Checked.h>
#include <AK/FlyString.h>
#include <AK/Format.h>
#include <AK/MemMem.h>
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <AK/Utf8View.h>
@ -328,6 +329,21 @@ Optional<size_t> String::find_byte_offset(u32 code_point, size_t from_byte_offse
return {};
}
Optional<size_t> String::find_byte_offset(StringView substring, size_t from_byte_offset) const
{
auto view = bytes_as_string_view();
if (from_byte_offset >= view.length())
return {};
auto index = memmem_optional(
view.characters_without_null_termination() + from_byte_offset, view.length() - from_byte_offset,
substring.characters_without_null_termination(), substring.length());
if (index.has_value())
return *index + from_byte_offset;
return {};
}
bool String::operator==(String const& other) const
{
if (is_short_string())