From: jreidthompson <Reid.Thompson@...>
Date: 2008-01-15T23:57:12+09:00
Subject: Re: Counting the files in a directory....



Kyle Schmitt wrote:
> 
> 
> I'll try and read more of the C stuff for handling files/directories
> in unix.  I can hold out hope for awhile.
> 
> Thanks,
>           Kyle
> 

You may have already gotten here....
What kind of times does this give? ( the first run will include the initial
compilation time )
You can modify it to meet your needs ( if you have questions, just post back
) -- see man scandir
you can setup a filter function to allow returning counts for specific file
matches.
As is, it returns a count for all files, visible and hidden.

for rubyinline see:
http://www.zenspider.com/ZSS/Products/RubyInline/

https://rubyforge.org/projects/rubyinline

-----------snip dircount.rb--------------------------------
require 'inline'

class DirCount
    inline do | builder |
        builder.include '<dirent.h>'
        builder.include '<stdio.h>'
        builder.c "
            int count() {
                struct dirent **namelist;
                int n;
                int count;

                count = n = scandir(\".\", &namelist, 0, 0);
                if (n < 0)
                    perror(\"scandir\");
                else {
                    while(n--) {
                    /* printf(\"%s\n\", namelist[n]->d_name);*/
                    free(namelist[n]);
                    }
                    free(namelist);
                }

                return (count);
            }"
    end
end

dc = DirCount.new()
puts dc.count()
-----------snip--------------------

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