From 3d4405b3950c7aecbdd624785ea84cd145b69894 Mon Sep 17 00:00:00 2001
From: hap <happppp@users.noreply.github.com>
Date: Sat, 19 Nov 2022 13:56:34 +0100
Subject: [PATCH] bufsprite: add length() getter

---
 src/devices/video/bufsprite.cpp | 2 +-
 src/devices/video/bufsprite.h   | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/devices/video/bufsprite.cpp b/src/devices/video/bufsprite.cpp
index 1c7180ec8cd..4de89e99364 100644
--- a/src/devices/video/bufsprite.cpp
+++ b/src/devices/video/bufsprite.cpp
@@ -41,7 +41,7 @@ void buffered_spriteram_device<Type>::device_start()
 {
 	if (m_spriteram)
 	{
-		m_buffered.resize(m_spriteram.bytes() / sizeof(Type));
+		m_buffered.resize(length());
 		save_item(NAME(m_buffered));
 	}
 }
diff --git a/src/devices/video/bufsprite.h b/src/devices/video/bufsprite.h
index 6716592d0c5..626ca505b44 100644
--- a/src/devices/video/bufsprite.h
+++ b/src/devices/video/bufsprite.h
@@ -42,13 +42,14 @@ public:
 	Type *live() const { return m_spriteram; }
 	Type *buffer() { return &m_buffered[0]; }
 	uint32_t bytes() const { return m_spriteram.bytes(); }
+	uint32_t length() const { return bytes() / sizeof(Type); }
 
 	// operations
 	Type *copy(uint32_t srcoffset = 0, uint32_t srclength = 0x7fffffff)
 	{
 		assert(m_spriteram != nullptr);
 		if (m_spriteram != nullptr)
-			memcpy(&m_buffered[0], m_spriteram + srcoffset, (std::min<size_t>)(srclength, m_spriteram.bytes() / sizeof(Type) - srcoffset) * sizeof(Type));
+			memcpy(&m_buffered[0], m_spriteram + srcoffset, (std::min<size_t>)(srclength, length() - srcoffset) * sizeof(Type));
 		return &m_buffered[0];
 	}