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Full Discussion: Is there a limit for a code line length in C?
Top Forums Programming Is there a limit for a code line length in C? Post 302431666 by alex_5161 on Tuesday 22nd of June 2010 12:31:29 PM
Old 06-22-2010
I have a source where some weird condition unstably produces the Segmentation Violation.
The error could disappeared or be moved into different place by adding/removing some line of code (some printf() and additional declaration/definitions.)
By 'dbx’, I see how some variable changed unexpectedly into impossible values.
I see the resulted change when the variable is used, but I can't catch when it is happening (the variable change itself!)
It still could be a logical error in code, but working on that problem already couple weeks (before last changes it works fine when I have removed all debug-statements) I start to think about some extreme situation, related to system (maybe our, maybe the standard one.)

I have reviewed today the code with expanded all macros (thanks to JohnGraham for advise how to do that!) and I see some line after that reach 4096 characters long and I am not sure by now if the line is braked in code or it is done by the editor (I use UltraEdit )
Just realized, that it is right - the lines are braked by the editor and actually, in code they are longer: the one I have reviewed now is 4096+1537 = 5633.
There are some code lines, consist of couple of 4096-chars lines.

Therefore, I've been thinking if a long code line in some situations comes across the processing memory, having the debug option is on...

(... Writing, I've thing that the memory for code and the processing memory used in different time... and debugging information does not include the '-E'-code lines, but just references to the original source file..., but ... not completely sure if the so long lines of code is not a reson of that error ...)

Therefore, I've asked this question trying to review any possibility for that error...

If you would have some idea or advise what else I could do to catch the error, I will appreciate to hear it very much!
Last edited by alex_5161; 06-22-2010 at 01:38 PM..
 

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LEARN ABOUT NETBSD

ppsratecheck

PPSRATECHECK(9) 					   BSD Kernel Developer's Manual					   PPSRATECHECK(9)

NAME

     ppsratecheck -- function to help implement rate-limited actions

SYNOPSIS

     #include <sys/time.h>

     int
     ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps);

DESCRIPTION

     The ppsratecheck() function provides easy way to perform packet-per-sec, or event-per-sec, rate limitation.  The motivation for implementing
     ppsratecheck() was to provide a mechanism that could be used to add rate limitation to network packet output.  For certain network packets,
     we may want to impose rate limitation, to avoid denial-of-service attack possibilities.

     maxpps specifies maximum permitted packets, or events, per second.  If ppsratecheck() is called more than maxpps times in a given one second
     period, the function will return 0, indicating that we exceeded the limit.  If we are below the limit, the function will return 1.  If maxpps
     is set to 0, the function will always return 0 (no packets/events are permitted).	Negative maxpps indicates that rate limitation is dis-
     abled, and ppsratecheck will always return 1.

     curpps and lasttime are used to maintain the number of recent calls.  curpps will be incremented every time ppsratecheck() is called, and
     will be reset whenever necessary.

SEE ALSO

     log(9), printf(9), ratecheck(9), time_second(9)

HISTORY

     The ppsratecheck() function appeared in NetBSD 1.5.

BSD
								  August 3, 2000							       BSD
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