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POHow can I find the strings from one file in another file in Perl?
 

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  1. POHow can I find the strings from one file in another file in Perl?
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    <p>The script below takes function names in a text file and scans on a folder that contains multiple c,h files. It opens those files one-by-one and reads each line. If the match is found in any part of the files, it prints the line number and the line that contains the match. </p> <p>Everything is working fine except that the comparison is not working properly. I would be very grateful to whoever solves my problem. </p> <pre><code> #program starts: use FileHandle; print "ENTER THE PATH OF THE FILE THAT CONTAINS THE FUNCTIONS THAT YOU WANT TO SEARCH: ";#getting the input file our $input_path = &lt;STDIN&gt;; $input_path =~ s/\s+$//; open(FILE_R1,'&lt;',"$input_path") || die "File open failed!"; print "ENTER THE PATH OF THE FUNCTION MODEL: ";#getting the folder path that #contains multiple .c,.h files our $model_path = &lt;STDIN&gt;; $model_path =~ s/\s+$//; our $last_dir = uc(substr ( $model_path,rindex( $model_path, "\\" ) +1 )); our $output = $last_dir."_FUNC_file_names"; while(our $func_name_input = &lt;FILE_R1&gt; )#$func_name_input is the function name #that is taken as the input { $func_name_input=reverse($func_name_input); $func_name_input=substr($func_name_input,rindex($func_name_input,"\("+1); $func_name_input=reverse($func_name_input); $func_name_input=substr($func_name_input,index($func_name_input," ")+1); #above 4 lines are func_name_input is choped and only part of the function #name is taken. opendir FUNC_MODEL,$model_path; while (our $file = readdir(FUNC_MODEL)) { next if($file !~ m/\.(c|h)/i); find_func($file); } close(FUNC_MODEL); } sub find_func() { my $fh1 = FileHandle-&gt;new("$model_path//$file") or die "ERROR: $!"; while (!$fh1-&gt;eof()) { my $func_name = $fh1-&gt;getline(); #getting the line **if($func_name =~$func_name_input)**#problem here it does not take the #match { next if($func_name=~m/^\s+/); print "$.,$func_name\n"; } } } </code></pre>
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    1. COWhat the hell is all that reverse/substr/rindex stuff doing to $func_name_input?
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      1. POHow can I find the strings from one file in another file in Perl?
      1. USSchwern
 

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