From 148c1c7341fb3393eaa0e94e24b86a4955972af4 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Sun, 18 Jun 2023 19:24:21 +0200
Subject: [PATCH] libluna: Add the clear_data() method to Vector and use it to
 optimize Base64::decode

This method clears the Vector's data without deallocating the
backing buffer, so that it can be reused without reallocation.
---
 libluna/include/luna/Vector.h | 7 +++++++
 libluna/src/Base64.cpp        | 3 ++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/libluna/include/luna/Vector.h b/libluna/include/luna/Vector.h
index c73d3989..65c73f19 100644
--- a/libluna/include/luna/Vector.h
+++ b/libluna/include/luna/Vector.h
@@ -201,6 +201,13 @@ template <typename T> class Vector
         m_data = nullptr;
     }
 
+    void clear_data()
+    {
+        for (usize i = 0; i < m_size; i++) { m_data[i].~T(); }
+
+        m_size = 0;
+    }
+
     Result<Vector<T>> shallow_copy()
     {
         Vector<T> other;
diff --git a/libluna/src/Base64.cpp b/libluna/src/Base64.cpp
index a40add49..25cdaf8e 100644
--- a/libluna/src/Base64.cpp
+++ b/libluna/src/Base64.cpp
@@ -118,6 +118,7 @@ namespace Base64
         }
 
         Vector<char> chars_read;
+        TRY(chars_read.try_reserve(4));
 
         for (const auto& c : data)
         {
@@ -134,7 +135,7 @@ namespace Base64
             if (chars_read.size() == 4)
             {
                 TRY(decode_base64_buffer(chars_read, buf));
-                chars_read.clear();
+                chars_read.clear_data();
             }
         }