From eb144691789b3361db549d0984b2d7a25f92c8a2 Mon Sep 17 00:00:00 2001
From: Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com>
Date: Mon, 31 Jul 2023 11:43:25 +0200
Subject: [PATCH] Create utility function for formatting bytes

Byte count to prettified representation as string.
---
 r5dev/public/tier0/utility.h |  1 +
 r5dev/tier0/utility.cpp      | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/r5dev/public/tier0/utility.h b/r5dev/public/tier0/utility.h
index db25e910..8c983f12 100644
--- a/r5dev/public/tier0/utility.h
+++ b/r5dev/public/tier0/utility.h
@@ -82,6 +82,7 @@ void PrintM128i64(__m128i in);
 void AppendPrintf(char* pBuffer, size_t nBufSize, char const* pFormat, ...);
 string PrintPercentageEscape(const string& svInput);
 
+string FormatBytes(size_t nBytes);
 string FormatV(const char* szFormat, va_list args);
 string Format(const char* szFormat, ...);
 
diff --git a/r5dev/tier0/utility.cpp b/r5dev/tier0/utility.cpp
index cf7b5698..63aa39ac 100644
--- a/r5dev/tier0/utility.cpp
+++ b/r5dev/tier0/utility.cpp
@@ -987,6 +987,18 @@ string PrintPercentageEscape(const string& svInput)
     return result;
 }
 
+///////////////////////////////////////////////////////////////////////////////
+// For formatting a STL string to a prettified representation of input bytes.
+string FormatBytes(size_t nBytes)
+{
+    char szBuf[128] = "";
+    const char* szPrefix[] = { "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB" };
+    const int iBase = 1024;
+    size_t c = (std::min)((size_t)(log((double)nBytes) / log((double)iBase)), (size_t)sizeof(szPrefix) - 1);
+    sprintf(szBuf, "%1.2lf %s", nBytes / pow((double)iBase, c), szPrefix[c]);
+    return string(szBuf);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // For formatting a STL string using C-style format specifiers (va_list version).
 string FormatV(const char* szFormat, va_list args)