AK: Override read_until_filled in FixedMemoryStream

This specialized method allow significant performance improvements for the user.
Author: https://github.com/LucasChollet Commit: 102fdf6305 Pull-request: https://github.com/SerenityOS/serenity/pull/19283 Reviewed-by: https://github.com/gmta ✅ Reviewed-by: https://github.com/kleinesfilmroellchen Reviewed-by: https://github.com/nico ✅ Reviewed-by: https://github.com/timschumi
2025-07-31 21:29:06 +00:00 · 2023-06-06 13:52:56 -04:00 · 2023-06-06 13:52:56 -04:00 · 102fdf6305 · 2024-07-17 04:10:16 +09:00
commit 102fdf6305
parent d00a563462
2 changed files with 12 additions and 0 deletions
--- a/AK/MemoryStream.cpp
+++ b/AK/MemoryStream.cpp
@ -54,6 +54,17 @@ ErrorOr<Bytes> FixedMemoryStream::read_some(Bytes bytes)
    return bytes.trim(to_read);
 }

+ErrorOr<void> FixedMemoryStream::read_until_filled(AK::Bytes bytes)
+{
+    if (remaining() < bytes.size())
+        return Error::from_string_view_or_print_error_and_return_errno("Can't read past the end of the stream memory"sv, EINVAL);
+
+    m_bytes.slice(m_offset).copy_trimmed_to(bytes);
+    m_offset += bytes.size();
+
+    return {};
+}
+
 ErrorOr<size_t> FixedMemoryStream::seek(i64 offset, SeekMode seek_mode)
 {
    switch (seek_mode) {