[pngzop] Added "pngzop_smallest.sh" script

pngzop_smallest.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+# For use in the pngzop project
+# Copyright 2013 by Glenn Randers-Pehrson
+# Released under the pngcrush license (equivalent to the libpng license)
+
+# Selects the smaller of file.zdat (extracted from a PNG) or
+# file.idat.zlib (same but recompressed with zopfli)
+
+# picksmallest file1 file...
+
+# for use on platforms that do not have "ls -S"
+
+smallest=$1
+smallsize=`ls -l $1 | sed -e "
+s/[^ 	]*[	 ]*\
+[^ 	]*[	 ]*\
+[^ 	]*[	 ]*\
+[^ 	]*[	 ]*\
+//" -e "s/[ 	].*//"`
+
+shift
+
+for x in $*
+do
+file=$1
+shift
+
+size=`ls -l $file | sed -e "
+s/[^ 	]*[	 ]*\
+[^ 	]*[	 ]*\
+[^ 	]*[	 ]*\
+[^ 	]*[	 ]*\
+//" -e "s/[ 	].*//"`
+
+if [ $smallsize -gt $size 	] ; then
+smallest=$file
+smallsize=$size
+fi
+done
+
+echo $smallest