Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Hi,there! I want to extract all the function call chains with specific length in source C codes. For example:

f1 calls (f2) f2 calls (f3,f4) f3 calls nothing f4 calls f5 f5 calls nothing

So f1->f2->f4->f5 is one of the function call chains and the length is 4. If I want to extract all the function call chains with length 3, then the results should be:

f1->f2->f3 f1->f2->f4 f2->f4->f5

The source codes are big and I have gotten all the function call information like above, i.e., f1 calls f2 and saved it in a hash of array. The keys are the caller function names and the value arrays are the callee function names. For the example above, the data structure is:

key value f1 f2 f2 f3,f4 f3 f4 f5 f5

I tended to use recursion, but was stuck, pls help! The code snippet is:

my %calls; #has all the function call information my $length = 3; #the length of function chains my @chain_store; #array of array, to save the chains while (($key, $value) = each %calls) { my @chain = (); push @chain, $key; get_chains($value, \@chain); } sub get_chains { my $value = shift; my $chain_ref = shift; my @chain = @{$chain_ref}; foreach my $val @{$value} { push @chain, $val; my $is_present = 1; for (my $count = 0; $count < $length; $count++) { if (exist($calls{$val})) { get_chains($calls{$val}) } else { $is_present = 0; last; } } if ($is_present) { push @chain_store, @chain; } } }

In reply to extract the function call chains of specific length by dwslovedh

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others making s'mores by the fire in the courtyard of the Monastery: (8)
    As of 2018-06-22 16:11 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (124 votes). Check out past polls.