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http://issues.apache.org/jira/browse/DIRSNICKERS-108?page=comments#action_12330279
]
Jérôme Baumgarten commented on DIRSNICKERS-108:
-----------------------------------------------
Regarding decoding of encoded int, there's an easy and straightforward way :
static public int decode(byte[] bytes) {
return new BigInteger(bytes).intValue();
}
and another way :
static public int decode(byte[] bytes) {
int value = 0;
if ((bytes[0] & 0x80) != 0) {
// negative value
value = -1; // 0xFFFFFFFF
}
value = (value << 8) | bytes[0];
for (byte i = 1 ; i < bytes.length ; i++) {
// The following doesn't work because of the numeric promotion of bytes[i]
// as explained in section 5.6.2 Binary Numeric Promotion of the
// Java Language SpecificationThird Edition
//
http://java.sun.com/docs/books/jls/third_edition/html/conversions.html#170983
// value = (value << 8) | bytes[i];
value = (value << 8) | (bytes[i] & 0x00FF);
}
return value;
}
Jérôme
> Wrong int encoding in Value
> ---------------------------
>
> Key: DIRSNICKERS-108
> URL: http://issues.apache.org/jira/browse/DIRSNICKERS-108
> Project: Directory ASN1
> Type: Bug
> Components: BER Runtime
> Reporter: Jérôme Baumgarten
> Assignee: Emmanuel Lecharny
> Priority: Blocker
> Attachments: Value.patch
>
> Hi,
> Encoding is buggy for int value in the org.apache.asn1new.ber.tlv.Value
> class. The affected methods are :
> * public static int getNbBytes( int value )
> * public static byte[] getBytes( int value )
> Regards,
> Jérôme
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