Maximum value of short

[enyab]

Hi All,
I am having a counter that is incremented at every transaction. I want to check if the counter reached the maximum value of 0xFFFF and then reset it to 0x0001. I am not able to do a proper compare beyond 0x7FFF. Is there any restriction on the Nokia 6212 NFC about the maximum allowed values or did someone come across this problem?. My code looks like,

incrementATC();
byte[] srcBuf = new byte[2];
Util.setShort(srcBuf, (short)0, ATC);
byte[] desBuf = {(byte) 0x7f, (byte) 0xfe};
	
short res = Util.arrayCompare(srcBuf, (short)0, desBuf, (short)0, (short)2);
if (res > ( (short) 0) ){
	setATCount(INITIAL_ATC);
	ISOException.throwIt((short)0x6999);
   }

thanks
Enya

[honest_success]

Hi All,
I am having a counter that is incremented at every transaction. I want to check if the counter reached the maximum value of 0xFFFF and then reset it to 0x0001. I am not able to do a proper compare beyond 0x7FFF. Is there any restriction on the Nokia 6212 NFC about the maximum allowed values or did someone come across this problem?. My code looks like,

incrementATC();
byte[] srcBuf = new byte[2];
Util.setShort(srcBuf, (short)0, ATC);
byte[] desBuf = {(byte) 0x7f, (byte) 0xfe};
	
short res = Util.arrayCompare(srcBuf, (short)0, desBuf, (short)0, (short)2);
if (res > ( (short) 0) ){
	setATCount(INITIAL_ATC);
	ISOException.throwIt((short)0x6999);
   }

thanks
Enya

Can you tell me why you are not using integer and why you are using hex.

[enyab]

I can use an integer.. means.. a short value like (short)99 for example. But I cannot use (short)65535 .. the ATC goes max upto (short)32767.. and any value above it I dont get an integer.. I get an Hex value. I assume that the phone has an upper limit. Is it true ?.
thanks
Enya

[Nokia Ron]

I think you will find that 65535 is unsigned short, a short is +- 32767

Ron

[enyab]

Hi Ron,
thanks for remining that.. and so the smart card os does not support unsigned short ?. Is there any alternative way for representing a value of 65535 ?
thanks
Enya