[C] fgets problem with SIGINT singlal!!! Post: 302273041

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Top Forums Programming [C] fgets problem with SIGINT singlal!!! Post 302273041 by jim mcnamara on Friday 2nd of January 2009 11:04:16 AM

01-02-2009

Registered User

Code:

#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

void readLine(char *inputBuffer)
{
    char *p=NULL;
    *inputbuffer=0x0;
    if(fgets (inputBuffer, MAX_LINE, stdin)==NULL)
    {
        if(feof(stdin)) return;
    	if(errno == EINTR)
    	{
    	    *readLine=0x0; /* or do what you want to a partial read */
    		return;
    	}
    	/* other errors */
    	perror("Fatal error on stdin");
    	exit(1);    	
    }
    /* fflush(stdin) is NOT a defined operation 
       if this actually works it is "programming by accident" 
       
    */		
    fflush(stdin);

    /* remove '\n' char from string */
    /* if the string entered is greater than MAX_LINE
       then you are whacking off valid characters
       
    if(strlen(inputBuffer) != 0)
        inputBuffer[strlen(inputBuffer)-1] = '\0';
        I am assuming MAX_LINE is defined by you and is not some system value
        try this instead:
    */
    p=strchr(inputBuffer, '\n');
    if(p!=NULL)
    	*p=0x0;

}

fgets handles SIGINT all by itself - don't need to call a signal handler for SIGINT or leave the SIGINT handler as it is by adding code as above.

jim mcnamara

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LEARN ABOUT DEBIAN

imager::color::float

Imager::Color::Float(3pm)				User Contributed Perl Documentation				 Imager::Color::Float(3pm)

NAME

       Imager::Color::Float - Rough floating point sample color handling

SYNOPSIS

	 $color = Imager::Color->new($red, $green, $blue);
	 $color = Imager::Color->new($red, $green, $blue, $alpha);
	 $color = Imager::Color->new("#C0C0FF"); # html color specification

	 $color->set($red, $green, $blue);
	 $color->set($red, $green, $blue, $alpha);
	 $color->set("#C0C0FF"); # html color specification

	 ($red, $green, $blue, $alpha) = $color->rgba();
	 @hsv = $color->hsv(); # not implemented but proposed

	 $color->info();

DESCRIPTION

       This module handles creating color objects used by Imager.  The idea is that in the future this module will be able to handle color space
       calculations as well.

       A floating point Imager color consists of up to four components, each in the range 0.0 to 1.0. Unfortunately the meaning of the components
       can change depending on the type of image you're dealing with:

       o   for 3 or 4 channel images the color components are red, green, blue, alpha.

       o   for 1 or 2 channel images the color components are gray, alpha, with the other two components ignored.

       An alpha value of zero is fully transparent, an alpha value of 1.0 is fully opaque.

METHODS

       new This creates a color object to pass to functions that need a color argument.

       set This changes an already defined color.  Note that this does not affect any places where the color has been used previously.

       rgba()
	   This returns the red, green, blue and alpha channels of the color the object contains.

       info
	   Calling info merely dumps the relevant color to the log.

AUTHOR

       Arnar M. Hrafnkelsson, addi@umich.edu And a great deal of help from others - see the "README" for a complete list.

SEE ALSO

       Imager(3), Imager::Color.

       http://imager.perl.org/

perl v5.14.2							    2011-06-06						 Imager::Color::Float(3pm)

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