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Added a little bit of range checking.

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This commit is contained in:
Robert Greene 2002-12-14 05:38:21 +00:00
parent 44bb363c06
commit 2ae3f2118c
1 changed files with 6 additions and 0 deletions
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6
src/com/webcodepro/applecommander/storage/AppleUtil.java
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@ -39,6 +39,9 @@ public class AppleUtil {
* A word is two bytes, in standard Apple LO/HI format.
*/
public static int getWordValue(byte[] buffer, int offset) {
if (offset+1 > buffer.length) {
return 0;
}
return getWordValue(buffer[offset], buffer[offset+1]);
}
/**
@ -62,6 +65,9 @@ public class AppleUtil {
* Stored in standard Apple LO/HI format.
*/
public static int get3ByteValue(byte[] buffer, int offset) {
if (offset+2 > buffer.length) {
return 0;
}
return getUnsignedByte(buffer[offset])
+ getUnsignedByte(buffer[offset+1])*256
+ getUnsignedByte(buffer[offset+2])*65536;