catfiles

CLAWPACK is a software package designed to compute numerical solutions to hyperbolic partial differe

#!/usr/bin/perl

# This script concatenates files created by output from Clawpack MPI version.

# First check for flags -v, --verbose, -h, --help
foreach $i (0..$#ARGV) {
    $verbose = $verbose || index($ARGV[$i],'-v') >= 0;
    $help =    $help    || index($ARGV[$i],'-h') >= 0;
}

if ($help) {
   print "This script concatenates files created ";
   print "by output from Clawpack MPI version\n\n";
   print "Flags : \n";
   print "  -v, --verbose  Prints out list of files to be concatenated.\n";
   exit 0;
}

# Open current directory.
opendir(curr_dir,".");

# Get array of files names that look like fort.q????.??
@fortfiles = grep(/fort.q\d{4}.\d{2}/,readdir(curr_dir));

# Get subset of array above that looks like fort.q????.00
# We will extract the unique file names from this list.
@basefiles = grep(/fort.q\d{4}.00/,@fortfiles);

closedir(curr_dir);

# Iterate over each of the base files.
foreach (@basefiles) {
    # Get unique file name of the form fort.q????
    $bfile = substr($_,0,10);

    # Create list of files with unique name, followed by .?? to concatenate.
    @list = grep(index($_,$bfile) >= 0,@fortfiles);
    if (@list > 0) {

       # Print out what we are doing, if user passed in -v or --verbose flags.
       if ($verbose) {
          print "Concatenating and removing files \n";
          grep(print($_."\n"),@list);
          print "and creating file $bfile\n\n";
       }

      # Concatenate and remove the files.
      $catstr = "cat @list > $bfile";
      !system($catstr) || die "Problem with command\n\n$catstr\n\n ";

      $rmstr = "rm @list";
      !system($rmstr) || die "Problem with command\n\n$rmstr\n\n ";
   }
}