From d5899a53fd3c1c78b998a3384216ef719e46bf9f Mon Sep 17 00:00:00 2001
From: Kahrl <kahrl@gmx.net>
Date: Mon, 26 Sep 2011 13:10:22 +0200
Subject: [PATCH] Fix processing of blocks below y=0 in sectors2sqlite.py.

---
 util/sectors2sqlite.py | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/util/sectors2sqlite.py b/util/sectors2sqlite.py
index 16ee7aae..17884212 100755
--- a/util/sectors2sqlite.py
+++ b/util/sectors2sqlite.py
@@ -23,10 +23,14 @@ if os.path.isdir(path + 'sectors/'):
 if not paths:
 	exit('Could not find sectors folder at ' + path + 'sectors2/ or ' + path + 'sectors/')
 
-def uint(u):
+def parseSigned12bit(u):
 	u = int('0x'+u, 16)
 	return (u if u < 2**11 else u - 2**12)
 
+def parseSigned16bit(u):
+	u = int('0x'+u, 16)
+	return (u if u < 2**15 else u - 2**16)
+
 def int64(u):
 	while u >= 2**63:
 		u -= 2**64
@@ -38,12 +42,12 @@ def int64(u):
 def getSectorPos(dirname):
 	if len(dirname) == 8:
 		# Old layout
-		x = uint(dirname[:4])
-		z = uint(dirname[4:])
+		x = parseSigned16bit(dirname[:4])
+		z = parseSigned16bit(dirname[4:])
 	elif len(dirname) == 7:
 		# New layout
-		x = uint(dirname[:3])
-		z = uint(dirname[4:])
+		x = parseSigned12bit(dirname[:3])
+		z = parseSigned12bit(dirname[4:])
 	else:
 		print('Terrible sector at ' + dirname)
 		return
@@ -60,7 +64,7 @@ def getBlockPos(sectordir, blockfile):
 	if len(blockfile) != 4:
 		print("Invalid block filename: " + blockfile)
 	
-	y = uint(blockfile)
+	y = parseSigned16bit(blockfile)
 	
 	return p2d[0], y, p2d[1]