Alternative for wc -l Post: 302462844

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Top Forums Shell Programming and Scripting Alternative for wc -l Post 302462844 by zaxxon on Friday 15th of October 2010 07:39:44 AM

10-15-2010

Registered User

@Methyl
Maybe use printf instead?

I think wc is just optimized for this task. Anyway here is a little C program you can compile with your favourite C compiler, for example:

Code:

gcc -Wall -o wcc wcc.c
# and then issue
./wcc yourfile

and try it out.

Code:

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


#define MAX 2048

int main(int argc, char** argv)
{
        char zbuf[MAX];
        long int z=0;
        FILE *fp;

        fp=fopen(argv[1],"r");
        if( !fp )
        {
                fprintf(stderr, "Error: File %s could not be opened.\n", argv[1]);
                exit (EXIT_FAILURE);
        }
        else
        {
                while ( fgets(zbuf, MAX, fp) )
                {
                        z++;
                }
        }
        fclose(fp);
        printf("Line count: %li\n", z);
        exit (EXIT_SUCCESS);
        return 0;
}

I have set the maximum line length to 2048 - maybe you want to increase this if it is not sufficient for your file. Maybe worth a try. I am no C programmer so maybe someone has even an idea to improve it.

It could be also the case that your hardware/OS is the bottle neck - just a guess.

Last edited by zaxxon; 10-15-2010 at 09:01 AM.. Reason: changed printf to long integer according to definition of z

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LEARN ABOUT MOJAVE

glpolygonmode

GLPOLYGONMODE(3G)														 GLPOLYGONMODE(3G)

NAME

       glPolygonMode - select a polygon rasterization mode

C SPECIFICATION

       void glPolygonMode( GLenum face,
			   GLenum mode )

PARAMETERS

       face  Specifies	the  polygons  that  mode  applies  to.   Must be GL_FRONT for front-facing polygons, GL_BACK for back-facing polygons, or
	     GL_FRONT_AND_BACK for front- and back-facing polygons.

       mode  Specifies how polygons will be rasterized.  Accepted values are GL_POINT, GL_LINE, and GL_FILL.  The initial  value  is  GL_FILL  for
	     both front- and back-facing polygons.

DESCRIPTION

       glPolygonMode controls the interpretation of polygons for rasterization.  face describes which polygons mode applies to: front-facing poly-
       gons (GL_FRONT), back-facing polygons (GL_BACK), or both (GL_FRONT_AND_BACK).  The polygon mode affects only  the  final  rasterization	of
       polygons.  In particular, a polygon's vertices are lit and the polygon is clipped and possibly culled before these modes are applied.

       Three modes are defined and can be specified in mode:

       GL_POINT      Polygon vertices that are marked as the start of a boundary edge are drawn as points.  Point attributes such as GL_POINT_SIZE
		     and GL_POINT_SMOOTH control the rasterization of the points.  Polygon rasterization  attributes  other  than  GL_POLYGON_MODE
		     have no effect.

       GL_LINE	     Boundary  edges  of  the polygon are drawn as line segments.  They are treated as connected line segments for line stippling;
		     the line stipple counter and  pattern  are  not  reset  between  segments	(see  glLineStipple).	Line  attributes  such	as
		     GL_LINE_WIDTH  and  GL_LINE_SMOOTH  control  the  rasterization  of  the  lines.  Polygon rasterization attributes other than
		     GL_POLYGON_MODE have no effect.

       GL_FILL	     The interior of the polygon is filled.  Polygon attributes such as GL_POLYGON_STIPPLE and GL_POLYGON_SMOOTH control the  ras-
		     terization of the polygon.

EXAMPLES

       To draw a surface with filled back-facing polygons and outlined front-facing polygons, call glPolygonMode(GL_FRONT, GL_LINE);

NOTES

       Vertices  are  marked as boundary or nonboundary with an edge flag.  Edge flags are generated internally by the GL when it decomposes poly-
       gons; they can be set explicitly using glEdgeFlag.

ERRORS

       GL_INVALID_ENUM is generated if either face or mode is not an accepted value.

       GL_INVALID_OPERATION is generated if glPolygonMode is executed between the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS

       glGet with argument GL_POLYGON_MODE

SEE ALSO

       glBegin, glEdgeFlag, glLineStipple, glLineWidth, glPointSize, glPolygonStipple

																 GLPOLYGONMODE(3G)