SCUMM: Cleanup querySaveMetaInfos implementation.

This results in less code and also less I/O operations (including seeking).

3 files changed, 29 insertions, 68 deletions

diff --git a/engines/scumm/detection.cpp b/engines/scumm/detection.cpp
index d2fd00762b..aa7e60930a 100644
--- a/engines/scumm/detection.cpp
+++ b/engines/scumm/detection.cpp
@@ -1262,25 +1262,21 @@ void ScummMetaEngine::removeSaveState(const char *target, int slot) const {
 }
 
 SaveStateDescriptor ScummMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
-	Common::String filename = ScummEngine::makeSavegameName(target, slot, false);
-	Common::InSaveFile *in = g_system->getSavefileManager()->openForLoading(filename);
-
-	if (!in)
-		return SaveStateDescriptor();
-
 	Common::String saveDesc;
-	Scumm::getSavegameName(in, saveDesc, 0);	// FIXME: heversion?!?
-	delete in;
+	Graphics::Surface *thumbnail = nullptr;
+	SaveStateMetaInfos infos;
+	memset(&infos, 0, sizeof(infos));
+	SaveStateMetaInfos *infoPtr = &infos;
 
-	// TODO: Cleanup
-	Graphics::Surface *thumbnail = ScummEngine::loadThumbnailFromSlot(target, slot);
+	// FIXME: heversion?!?
+	if (!ScummEngine::querySaveMetaInfos(target, slot, 0, saveDesc, thumbnail, infoPtr)) {
+		return SaveStateDescriptor();
+	}
 
 	SaveStateDescriptor desc(slot, saveDesc);
 	desc.setThumbnail(thumbnail);
 
-	SaveStateMetaInfos infos;
-	memset(&infos, 0, sizeof(infos));
-	if (ScummEngine::loadInfosFromSlot(target, slot, &infos)) {
+	if (infoPtr) {
 		int day = (infos.date >> 24) & 0xFF;
 		int month = (infos.date >> 16) & 0xFF;
 		int year = infos.date & 0xFFFF;
diff --git a/engines/scumm/saveload.cpp b/engines/scumm/saveload.cpp
index f9d4456c14..3feab2e62f 100644
--- a/engines/scumm/saveload.cpp
+++ b/engines/scumm/saveload.cpp
@@ -678,72 +678,39 @@ bool getSavegameName(Common::InSaveFile *in, Common::String &desc, int heversion
 	return true;
 }
 
-Graphics::Surface *ScummEngine::loadThumbnailFromSlot(const char *target, int slot) {
-	Common::SeekableReadStream *in;
-	SaveGameHeader hdr;
-
-	if (slot < 0)
-		return 0;
-
-	Common::String filename = ScummEngine::makeSavegameName(target, slot, false);
-	if (!(in = g_system->getSavefileManager()->openForLoading(filename))) {
-		return 0;
-	}
-
-	// FIXME: HE version?
-	if (!loadAndCheckSaveGameHeader(in, 0, hdr)) {
-		delete in;
-		return 0;
-	}
-
-	if (hdr.ver < VER(52)) {
-		delete in;
-		return 0;
-	}
-
-	Graphics::Surface *thumb = 0;
-	if (Graphics::checkThumbnailHeader(*in)) {
-		thumb = Graphics::loadThumbnail(*in);
+bool ScummEngine::querySaveMetaInfos(const char *target, int slot, int heversion, Common::String &desc, Graphics::Surface *&thumbnail, SaveStateMetaInfos *&timeInfos) {
+	if (slot < 0) {
+		return false;
 	}
 
-	delete in;
-	return thumb;
-}
-
-bool ScummEngine::loadInfosFromSlot(const char *target, int slot, SaveStateMetaInfos *stuff) {
-	Common::SeekableReadStream *in;
 	SaveGameHeader hdr;
+	const Common::String filename = ScummEngine::makeSavegameName(target, slot, false);
+	Common::ScopedPtr<Common::SeekableReadStream> in(g_system->getSavefileManager()->openForLoading(filename));
 
-	if (slot < 0)
-		return 0;
-
-	Common::String filename = makeSavegameName(target, slot, false);
-	if (!(in = g_system->getSavefileManager()->openForLoading(filename))) {
+	if (!in) {
 		return false;
 	}
 
-	// FIXME: HE version?
-	if (!loadAndCheckSaveGameHeader(in, 0, hdr)) {
-		delete in;
+	if (!loadAndCheckSaveGameHeader(in.get(), heversion, hdr)) {
 		return false;
 	}
 
-	if (hdr.ver < VER(56)) {
-		delete in;
-		return false;
-	}
+	desc = hdr.name;
 
-	if (!Graphics::skipThumbnail(*in)) {
-		delete in;
-		return false;
-	}
+	if (hdr.ver > VER(52)) {
+		if (Graphics::checkThumbnailHeader(*in)) {
+			thumbnail = Graphics::loadThumbnail(*in);
+		}
 
-	if (!loadInfos(in, stuff)) {
-		delete in;
-		return false;
+		if (hdr.ver > VER(57)) {
+			if (!loadInfos(in.get(), timeInfos)) {
+				return false;
+			}
+		} else {
+			timeInfos = nullptr;
+		}
 	}
 
-	delete in;
 	return true;
 }
 
diff --git a/engines/scumm/scumm.h b/engines/scumm/scumm.h
index 0b0c14a59a..942e8a6b69 100644
--- a/engines/scumm/scumm.h
+++ b/engines/scumm/scumm.h
@@ -620,9 +620,7 @@ public:
 
 // thumbnail + info stuff
 public:
-	static Graphics::Surface *loadThumbnailFromSlot(const char *target, int slot);
-
-	static bool loadInfosFromSlot(const char *target, int slot, SaveStateMetaInfos *stuff);
+	static bool querySaveMetaInfos(const char *target, int slot, int heversion, Common::String &desc, Graphics::Surface *&thumbnail, SaveStateMetaInfos *&timeInfos);
 
 protected:
 	void saveInfos(Common::WriteStream* file);