From 53d36be339e206a3b1dafd2f015a9cbb79c00a86 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Sat, 1 Oct 2022 12:13:38 +0200
Subject: [PATCH] Add a much-needed get_blocks_from_size function

---
 kernel/include/misc/utils.h | 8 ++++++++
 kernel/src/init/InitRD.cpp  | 3 ++-
 kernel/src/misc/utils.cpp   | 6 ++++++
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 kernel/include/misc/utils.h
 create mode 100644 kernel/src/misc/utils.cpp

diff --git a/kernel/include/misc/utils.h b/kernel/include/misc/utils.h
new file mode 100644
index 00000000..a2ecab57
--- /dev/null
+++ b/kernel/include/misc/utils.h
@@ -0,0 +1,8 @@
+#pragma once
+#include <stdint.h>
+
+namespace Utilities
+{
+    uint64_t get_blocks_from_size(uint64_t blocksize,
+                                  uint64_t size); // Returns how many blocks of size blocksize does size occupy.
+}
\ No newline at end of file
diff --git a/kernel/src/init/InitRD.cpp b/kernel/src/init/InitRD.cpp
index b66f7056..125fd5a9 100644
--- a/kernel/src/init/InitRD.cpp
+++ b/kernel/src/init/InitRD.cpp
@@ -5,6 +5,7 @@
 #include "io/Serial.h"
 #include "log/Log.h"
 #include "memory/MemoryManager.h"
+#include "misc/utils.h"
 #include "std/stdlib.h"
 #include <string.h>
 
@@ -56,7 +57,7 @@ InitRD::File InitRD::get_file(TarHeader* header)
         multiplier *= 8;
     }
     result.addr = (void*)((uint64_t)header + TAR_BLOCKSIZE);
-    result.size_in_blocks = (result.size + (TAR_BLOCKSIZE - 1)) / TAR_BLOCKSIZE;
+    result.size_in_blocks = Utilities::get_blocks_from_size(TAR_BLOCKSIZE, result.size);
     return result;
 }
 
diff --git a/kernel/src/misc/utils.cpp b/kernel/src/misc/utils.cpp
new file mode 100644
index 00000000..528d5e38
--- /dev/null
+++ b/kernel/src/misc/utils.cpp
@@ -0,0 +1,6 @@
+#include "misc/utils.h"
+
+uint64_t Utilities::get_blocks_from_size(uint64_t blocksize, uint64_t size)
+{
+    return (size + (blocksize - 1)) / blocksize;
+}
\ No newline at end of file