X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altoslib%2FAltosEepromRecord.java;h=22cb8f894b2f7d73ac5078032b09026304d01b06;hp=12519e6b91c1b47beff90c731765e9646c4b9ec1;hb=21c630af7181a03b44cfcfa1cc787212501785ec;hpb=749400fd244eba38806c623d2a35722642230698

diff --git a/altoslib/AltosEepromRecord.java b/altoslib/AltosEepromRecord.java
index 12519e6b..22cb8f89 100644
--- a/altoslib/AltosEepromRecord.java
+++ b/altoslib/AltosEepromRecord.java
@@ -12,7 +12,7 @@
  * General Public License for more details.
  */
 
-package org.altusmetrum.altoslib_12;
+package org.altusmetrum.altoslib_13;
 
 public abstract class AltosEepromRecord implements Comparable<AltosEepromRecord> {
 
@@ -50,8 +50,22 @@ public abstract class AltosEepromRecord implements Comparable<AltosEepromRecord>
 		return data8(i) | (data8(i+1) << 8) | (data8(i+2) << 16) | (data8(i+3) << 24);
 	}
 
+	public boolean empty(int s) {
+		for (int i = 0; i < length; i++)
+			if (eeprom.data8(s + i) != 0xff)
+				return false;
+		return true;
+	}
+
 	public boolean valid(int s) {
-		return AltosConvert.checksum(eeprom.data, s, length) == 0;
+		int	ck = AltosConvert.checksum(eeprom.data, s, length);
+
+		if (ck != 0) {
+			++eeprom.errors;
+			System.out.printf("invalid checksum 0x%x at 0x%x\n", ck, s);
+			return false;
+		}
+		return true;
 	}
 
 	public boolean valid() {
@@ -100,25 +114,18 @@ public abstract class AltosEepromRecord implements Comparable<AltosEepromRecord>
 		int	s = start + length;
 
 		while (s + length <= eeprom.data.size()) {
-			if (valid(s))
+			if (!empty(s) && valid(s))
 				return s;
 			s += length;
 		}
 		return -1;
 	}
 
-	public boolean hasNext() {
-		return next_start() >= 0;
-	}
-
 	public abstract AltosEepromRecord next();
 
 	public AltosEepromRecord(AltosEeprom eeprom, int start, int length) {
 		this.eeprom = eeprom;
 		this.start = start;
 		this.length = length;
-
-		while (start + length < eeprom.data.size() && !valid())
-			start += length;
 	}
 }