From 6197910e3e141323c5ca7c34a7bfcb061add66a6 Mon Sep 17 00:00:00 2001
From: Kelvin Sherlock <ksherlock@gmail.com>
Date: Sat, 7 Feb 2015 12:30:30 -0500
Subject: [PATCH] RM::ChangedResource

---
 toolbox/rm.cpp      | 54 +++++++++++++++++++++++++++++++++++++++++++++
 toolbox/rm.h        |  2 +-
 toolbox/toolbox.cpp |  4 ++++
 3 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/toolbox/rm.cpp b/toolbox/rm.cpp
index 402207f..72722b5 100644
--- a/toolbox/rm.cpp
+++ b/toolbox/rm.cpp
@@ -780,6 +780,60 @@ namespace RM
 		return SetResError(::ResError());
 	}
 
+
+	uint16_t ChangedResource(uint16_t trap)
+	{
+		// PROCEDURE ChangedResource (theResource: Handle);
+
+		uint32_t theResource;
+
+		StackFrame<4>(theResource);
+
+		Log("%04x ChangedResource(%04x)\n", trap, theResource);
+
+
+		// set the resChanged attribute so when UpdateResFile() is called
+		// (or the app exits) 
+		// also needs to update the carbon handle/data with the mpw handle
+		// since the data has changed....
+
+
+		auto iter = rhandle_map.find(theResource);
+		if (iter == rhandle_map.end())
+		{
+			return SetResError(MacOS::resNotFound);
+		}
+
+		Handle nativeHandle = iter->second;
+
+		// check if handle size changed, resync data
+
+		auto info = MM::GetHandleInfo(theResource);
+		if (!info.error()) return SetResError(info.error());
+
+
+		uint32_t nativeSize = ::GetHandleSize(nativeHandle);
+
+		if (nativeSize != info->size) {
+			// resize...
+			// chould get state / unlock / set state ... but that does nothing in OS X.
+
+			::SetHandleSize(nativeHandle, info->size);
+			OSErr err = MemError();
+			if (err) return SetResError(err);
+		}
+
+		std::memcpy(*nativeHandle, memoryPointer(info->address), info->size);
+
+		::ChangedResource(nativeHandle);
+
+		return SetResError(::ResError());
+	}
+
+
+
+
+
 	uint16_t GetResFileAttrs(uint16_t trap)
 	{
 		// FUNCTION GetResFileAttrs (refNum: Integer): Integer;
diff --git a/toolbox/rm.h b/toolbox/rm.h
index 6148545..af0cfb5 100644
--- a/toolbox/rm.h
+++ b/toolbox/rm.h
@@ -45,7 +45,7 @@ namespace RM
 	uint16_t SetResAttrs(uint16_t trap);
 	uint16_t WriteResource(uint16_t trap);
 	uint16_t DetachResource(uint16_t trap);
-
+	uint16_t ChangedResource(uint16_t trap);
 	uint16_t RemoveResource(uint16_t trap);
 
 	uint16_t GetResourceSizeOnDisk(uint16_t trap);
diff --git a/toolbox/toolbox.cpp b/toolbox/toolbox.cpp
index f53ec3f..b763772 100644
--- a/toolbox/toolbox.cpp
+++ b/toolbox/toolbox.cpp
@@ -549,6 +549,10 @@ namespace ToolBox {
 				d0 = RM::AddResource(trap);
 				break;
 
+			case 0xa9aa:
+				d0 = RM::ChangedResource(trap);
+				break;
+
 			case 0xa9ad:
 				d0 = RM::RemoveResource(trap);
 				break;