From f1ca9ccc6426a46a7da47bf4a36301bd849bf978 Mon Sep 17 00:00:00 2001
From: Colin Snover
Date: Mon, 9 Jan 2017 17:23:29 -0600
Subject: SCI32: Fix kSetLanguage

---
 engines/sci/engine/ksound.cpp  |  4 +--
 engines/sci/resource.h         |  2 +-
 engines/sci/resource_audio.cpp | 62 +++++++++++++++++++++++++++---------------
 3 files changed, 42 insertions(+), 26 deletions(-)

diff --git a/engines/sci/engine/ksound.cpp b/engines/sci/engine/ksound.cpp
index ed53b8d52f..4a5e4f3df6 100644
--- a/engines/sci/engine/ksound.cpp
+++ b/engines/sci/engine/ksound.cpp
@@ -493,10 +493,8 @@ reg_t kSetLanguage(EngineState *s, int argc, reg_t *argv) {
 	// Basically, it instructs the interpreter to switch the audio resources
 	// (resource.aud and associated map files) and load them from the "Spanish"
 	// subdirectory instead.
-	Common::String audioDirectory = s->_segMan->getString(argv[0]);
-	//warning("SetLanguage: set audio resource directory to '%s'", audioDirectory.c_str());
+	const Common::String audioDirectory = s->_segMan->getString(argv[0]);
 	g_sci->getResMan()->changeAudioDirectory(audioDirectory);
-
 	return s->r_acc;
 }
 
diff --git a/engines/sci/resource.h b/engines/sci/resource.h
index e601a1c434..5589129553 100644
--- a/engines/sci/resource.h
+++ b/engines/sci/resource.h
@@ -372,7 +372,7 @@ public:
 
 	void setAudioLanguage(int language);
 	int getAudioLanguage() const;
-	void changeAudioDirectory(Common::String path);
+	void changeAudioDirectory(const Common::String &path);
 	bool isGMTrackIncluded();
 	bool isSci11Mac() const { return _volVersion == kResVersionSci11Mac; }
 	ViewType getViewType() const { return _viewType; }
diff --git a/engines/sci/resource_audio.cpp b/engines/sci/resource_audio.cpp
index 7757445bc1..bd6eee3cca 100644
--- a/engines/sci/resource_audio.cpp
+++ b/engines/sci/resource_audio.cpp
@@ -964,33 +964,53 @@ bool ResourceManager::addAudioSources() {
 	return true;
 }
 
-void ResourceManager::changeAudioDirectory(Common::String path) {
-	// TODO: This implementation is broken.
-	return;
-
-#if 0
-	// Remove all of the audio map resource sources, as well as the audio resource sources
-	for (Common::List<ResourceSource *>::iterator it = _sources.begin(); it != _sources.end();) {
-		ResourceSource *source = *it;
-		ResSourceType sourceType = source->getSourceType();
-
-		// Remove the resource source, if it's an audio map or an audio file
-		if (sourceType == kSourceIntMap || sourceType == kSourceAudioVolume) {
-			// Don't remove 65535.map (the SFX map) or resource.sfx
-			if (source->_volumeNumber == 65535 || source->getLocationName() == "RESOURCE.SFX") {
-				++it;
+void ResourceManager::changeAudioDirectory(const Common::String &path) {
+	// Resources must be cleared before ResourceSources because the destructor
+	// of a Resource accesses its own ResourceSource
+	ResourceMap::iterator resIt = _resMap.begin();
+	while (resIt != _resMap.end()) {
+		Resource *resource = resIt->_value;
+		ResourceType type = resource->getType();
+		if (type == kResourceTypeMap ||
+			type == kResourceTypeAudio36 ||
+			type == kResourceTypeSync36) {
+
+			if (type == kResourceTypeMap && resource->getNumber() == 65535) {
+				++resIt;
 				continue;
 			}
 
-			// erase() will move the iterator to the next element
-			it = _sources.erase(it);
+			if (resource->_status == kResStatusLocked) {
+				resource->_lockers = 1;
+				unlockResource(resource);
+			}
+			if (resource->_status == kResStatusEnqueued) {
+				removeFromLRU(resource);
+			}
+			if (resource->_status != kResStatusNoMalloc) {
+				resource->unalloc();
+			}
+			delete resource;
+			_resMap.erase(resIt);
+		}
+
+		++resIt;
+	}
+
+	Common::List<ResourceSource *>::iterator sourceIt = _sources.begin();
+	while (sourceIt != _sources.end()) {
+		ResourceSource *source = *sourceIt;
+		ResSourceType sourceType = source->getSourceType();
+		if ((sourceType == kSourceIntMap && source->_volumeNumber != 65535) ||
+			(sourceType == kSourceAudioVolume && source->getLocationName() != "RESOURCE.SFX")) {
+
+			sourceIt = _sources.erase(sourceIt);
 			delete source;
 		} else {
-			++it;
+			++sourceIt;
 		}
 	}
 
-	// Now, readd the audio resource sources
 	Common::String mapName = "MAP";
 	Common::String audioResourceName = "RESOURCE.AUD";
 	if (!path.empty()) {
@@ -1002,16 +1022,14 @@ void ResourceManager::changeAudioDirectory(Common::String path) {
 	Common::List<ResourceId>::iterator it;
 	for (it = resources.begin(); it != resources.end(); ++it) {
 		// Don't readd 65535.map or resource.sfx
-		if ((it->getNumber() == 65535))
+		if (it->getNumber() == 65535)
 			continue;
 
 		ResourceSource *src = addSource(new IntMapResourceSource(mapName, 0, it->getNumber()));
 		addSource(new AudioVolumeResourceSource(this, audioResourceName, src, 0));
 	}
 
-	// Rescan the newly added resources
 	scanNewSources();
-#endif
 }
 
 } // End of namespace Sci
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