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#!/usr/bin/perl
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#======================================================================
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# S P L I T R D I
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# doc: Sat Aug 21 22:20:27 2010
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# dlm: Sat Aug 21 23:18:41 2010
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# (c) 2010 A.M. Thurnherr
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# uE-Info: 51 44 NIL 0 0 72 2 2 4 NIL ofnI
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#======================================================================
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# split RDI files based on list of ensemble numbers (e.g. from yoyo -t)
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# HISTORY:
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# Aug 21, 2010: - created
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# NOTES:
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# - it is assumed that the input file begins with ensemble #1
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# - input file extension 000 is assumed
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# - turning-point ensembles are written to preceding profile,
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# for compatibility with [yoyo]
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$0 =~ m{(.*/)[^/]+};
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require "$1RDI_BB_Read.pl";
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use Getopt::Std;
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die("Usage: $0 " .
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"[out-file -b)asename <bn>] " .
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"[out-file -n) <digits>] " .
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"<RDI file> <ens> <ens[...]>\n")
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unless (&getopts('b:n:') && @ARGV>=3);
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chomp($opt_b = `basename $ARGV[0] .000`) # basename
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unless defined($opt_b);
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$opt_n = 2 # number of digits in profile #
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unless defined($opt_n);
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readHeader($ARGV[0],\%hdr); shift; # get length of ensembles
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$ens_len = $hdr{ENSEMBLE_BYTES} + 2;
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$first_ens = $ARGV[0]+1; shift; # initialize loop
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$last_ens = $ARGV[0]; shift;
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$cnr = 0;
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do { # split data
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sysseek(WBRF,($first_ens-2)*$ens_len,0) ||
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die("$WBRcfn: $!");
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$last_ens++ unless defined($ARGV[0]);
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$nBytes = ($last_ens-$first_ens+1) * $ens_len;
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sysread(WBRF,$buf,$nBytes) == $nBytes ||
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die("$WBRcfn: file truncated");
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$fn = $opt_b . sprintf("_%0${opt_n}d.000",$cnr++);
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open(F,">$fn") || die("$fn: $!\n");
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syswrite(F,$buf,$nBytes) == $nBytes ||
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die("$fn: $!\n");
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close(F);
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printf(STDERR "$fn: %d ensembles ($nBytes bytes)\n",$last_ens-$first_ens+1);
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$first_ens = $last_ens+1;
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$last_ens = $ARGV[0]; shift;
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} while defined($last_ens);
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exit(0);
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