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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: Wed Mar 19 16:35:45 2014
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# (c) 2010 A.M. Thurnherr
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# uE-Info: 36 43 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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# Jun 24, 2011: - replaced -b, -n by -o
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# Feb 13, 2014: - updated doc
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# Mar 19, 2014: - added -s)kip small files
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# NOTES:
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# - it is assumed that the input file begins with ensemble #1
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# - turning-point ensembles are written to preceding profile,
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# for compatibility with [yoyo]
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# FILE NAME CONVENTION:
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# - in order to assign individual yoyo casts numerical station numbers,
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# by default, the yoyo cast number is inserted after the station number
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# EXAMPLES:
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# splitRDI 017DL000.000 `mkProfile 017DL000.000 | yoyo -QFens -ut`
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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: $0 " .
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"[-o)ut-file <fmt[e.g. 017%02dDL000.000]>] " .
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"[require -m)in <ens> to produce output] " .
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"<RDI file> <ens> <ens[...]>\n")
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unless (&getopts('o:m:') && @ARGV>=3);
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$opt_o = substr($ARGV[0],0,3) # default output filename format
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. '%02d'
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. substr($ARGV[0],-9)
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unless defined($opt_o);
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$opt_m = 0 unless defined($opt_m); # default: produce tiny files as well
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readHeader($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) || # read next block of data
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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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if ($last_ens-$first_ens+1 > $opt_m) { # produce file only if sufficient # of ensembles
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$fn = sprintf($opt_o,$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-$first_ens+1);
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}
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$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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