From 248e5d3c59adae40006db4b80a0efc3107312082 Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Fri, 10 Feb 2017 02:51:52 +0200
Subject: CRYO: Add handling for the cryo.dat aux data file

---
 engines/cryo/eden.cpp | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/engines/cryo/eden.cpp b/engines/cryo/eden.cpp
index b8e191c50b..4ff18bf307 100644
--- a/engines/cryo/eden.cpp
+++ b/engines/cryo/eden.cpp
@@ -48,6 +48,8 @@
 
 namespace Cryo {
 
+#define CRYO_DAT_VER 1	// 1 byte
+
 int16 _torchTick = 0;
 int16 _glowIndex = 0;
 int16 _torchCurIndex = 0;
@@ -4733,11 +4735,23 @@ void EdenGame::loadpermfiles() {
 		// Since PC version stores hotspots and rooms info in the executable, load them from premade resource file
 		Common::File f;
 
-		if (f.open("led.dat")) {
+		if (f.open("cryo.dat")) {
 			const int kNumIcons = 136;
 			const int kNumRooms = 424;
-			if (f.size() != kNumIcons * sizeof(Icon) + kNumRooms * sizeof(Room))
-				error("Mismatching aux data");
+			const int dataSize = f.size() - 8 - 1;	// CRYODATA + version
+			char headerId[9];
+			
+			f.read(headerId, 8);
+			headerId[8] = '\0';
+			if (strcmp(headerId, "CRYODATA"))
+				error("Invalid aux data file");
+
+			if (f.readByte() != CRYO_DAT_VER)
+				error("Incorrect aux data version");
+
+			if (dataSize != kNumIcons * sizeof(Icon) + kNumRooms * sizeof(Room))
+				error("Mismatching data in aux data file");
+
 			for (int i = 0; i < kNumIcons; i++) {
 				_gameIcons[i].sx = f.readSint16LE();
 				_gameIcons[i].sy = f.readSint16LE();
-- 
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