underflow

How can I prevent/detect an underflow in a Postgresql calculation that uses EXP()

I am receiving a value out of range: underflow error from pgsql, in a query that uses the EXP(x) function. What values of x trigger this? How do I prevent or detect it? ...

CSS Underflow fix

Hi Folks, I'm wondering if there are any underflow fixes for css? The initial problem was an overflow which is easily fixed but has now become an underflow problem.I have set a specific height value but it just seems to ignore this and instead resizes to suit the contents. I appreciate any help and ideas. Thanks! ...

How to avoid reference count underflow in _NSCFURLProtocolBridge in custom NSURLProtocol in GC environment

The basics are I have a custom NSURLProtocol. In startLoading, [self client] is of type: <_NSCFURLProtocolBridge> {NSURLProtocol, CFURLProtocol} The problem is running this in a garbage-collected environment. Because I'm writing a screensaver, I'm forced to make it garbage-collected. However, the _NSCFURLProtocolBridge protocol see...

Common underflow and overflow exceptions

I am trying to get a hold of overflow and underflow exceptions in java, but couldn't get any nice tutorial. Specifically I wish to learn How are they different from each other? What are the subclasses of these exceptions? In which scenario they are thrown? Which of them can be handled and how? What are the best practice related to the...

Checking for underflow/overflow in C++?

Is there a general way to check for an overflow or an underflow of a given data type (uint32, int etc.)? I am doing something like this: uint32 a,b,c; ... //initialize a,b,c if(b < c) { a -= (c - b) } When I print a after some iterations, it displays a large number like: 4294963846. ...

Binary Addition. Is it overflow?

Binary values are in 2s Complement form. If I am to add 110001 (-15) and 101110 (-18), and the answer has to be stored in a 6-bit integer, is this an underflow/overflow. ...

Question about C behaviour for unsigned integer underflow

I have read in many places that integer overflow is well-defined in C unlike the signed counterpart. Is underflow the same? For example: unsigned int x = -1; // Does x == UINT_MAX? Thanks. I can't recall where, but i read somewhere that arithmetic on unsigned integral types is modular, so if that were the case then -1 == UINT_MAX m...

Explain Change to GNU C++ filebuf::underflow() interacting with filebuf::seekoff()

My company's products run on a number of qualified Linux hardware/software configurations. Historically, the compiler used has been GNU C++. For purposes of this post, let's consider version 3.2.3 the baseline, as our software 'worked as expected' through that version. With the introduction of a newer qualified platform, using GNU C++ v...