AK: Add `StringView::copy_characters_to_buffer()`

2 files changed, 14 insertions, 0 deletions

diff --git a/AK/StringView.cpp b/AK/StringView.cpp
index fdcb6f4b8f..e1fd99809f 100644
--- a/AK/StringView.cpp
+++ b/AK/StringView.cpp
@@ -182,6 +182,18 @@ StringView StringView::substring_view_starting_after_substring(StringView substr
     return { remaining_characters, remaining_length };
 }
 
+bool StringView::copy_characters_to_buffer(char* buffer, size_t buffer_size) const
+{
+    // We must fit at least the NUL-terminator.
+    VERIFY(buffer_size > 0);
+
+    size_t characters_to_copy = min(m_length, buffer_size - 1);
+    __builtin_memcpy(buffer, m_characters, characters_to_copy);
+    buffer[characters_to_copy] = 0;
+
+    return characters_to_copy == m_length;
+}
+
 template<typename T>
 Optional<T> StringView::to_int() const
 {
diff --git a/AK/StringView.h b/AK/StringView.h
index 05331e0580..7bc7985802 100644
--- a/AK/StringView.h
+++ b/AK/StringView.h
@@ -192,6 +192,8 @@ public:
     [[nodiscard]] StringView substring_view_starting_from_substring(StringView substring) const;
     [[nodiscard]] StringView substring_view_starting_after_substring(StringView substring) const;
 
+    [[nodiscard]] bool copy_characters_to_buffer(char* buffer, size_t buffer_size) const;
+
     constexpr bool operator==(char const* cstring) const
     {
         if (is_null())