From 489736d23b90b2bfe7331696962406cba46f3061 Mon Sep 17 00:00:00 2001
From: Gary Talent <gtalent2@gmail.com>
Date: Tue, 7 Nov 2017 21:39:18 -0600
Subject: [PATCH] Add an optional sizeOut parameter to Metal Claw write

---
 src/ox/mc/write.cpp |  4 ++++
 src/ox/mc/write.hpp | 10 ++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/ox/mc/write.cpp b/src/ox/mc/write.cpp
index cf214d0e1..7b691019c 100644
--- a/src/ox/mc/write.cpp
+++ b/src/ox/mc/write.cpp
@@ -51,4 +51,8 @@ void MetalClawWriter::setFields(int fields) {
 	m_fieldPresence.setMaxLen(m_buffIt);
 }
 
+size_t MetalClawWriter::size() {
+	return m_buffIt;
+}
+
 }
diff --git a/src/ox/mc/write.hpp b/src/ox/mc/write.hpp
index ccaabd154..875558f0a 100644
--- a/src/ox/mc/write.hpp
+++ b/src/ox/mc/write.hpp
@@ -49,6 +49,8 @@ class MetalClawWriter {
 
 		void setFields(int fields);
 
+		size_t size();
+
 	private:
 		template<typename I>
 		int appendInteger(I val);
@@ -144,9 +146,13 @@ int MetalClawWriter::op(const char*, T *val, size_t len) {
 };
 
 template<typename T>
-int write(uint8_t *buff, size_t buffLen, T *val) {
+int write(uint8_t *buff, size_t buffLen, T *val, size_t *sizeOut = nullptr) {
 	MetalClawWriter writer(buff, buffLen);
-	return ioOp(&writer, val);
+	auto err = ioOp(&writer, val);
+	if (sizeOut) {
+		*sizeOut = writer.size();
+	}
+	return err;
 }
 
 }