Add indentation tool

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@899 42af7a65-404d-4744-a932-0658087f49c3

tools/indent.sh

+#!/bin/sh
+#
+# This script uses the Linux 'indent' utility to re-format C source files
+# to match the coding style that I use.  It differs from my coding style in that
+#
+# - I normally put the traiing */ of a multi-line comment on a separate line,
+# - I usually align things vertically (like '='in assignments.
+#
+
+# Constants
+
+options="-nbad -bap -bbb -nbbo -nbc -bl -bl2 -bls -nbs -cbi2 -ncdw -nce -ci2 -cli0 -cp40 -ncs -nbfda -nbfde -di1 -nfc1 -fca -i2 -l80 -lp -ppi2 -lps -npcs -pmt -nprs -npsl -saf -sai -sbi2 -saw -sc -sob -nss -nut"
+
+usage="USAGE: $0 <in-file> <out-file>"
+
+# Inputs
+
+infile=$1
+outfile=$2
+
+# Verify inputs
+
+if [ -z "$infile" ]; then
+    echo "Missing <in-file>"
+    echo $usage
+    exit 1
+fi
+
+if [ ! -r $infile ]; then
+    echo "Readable $nfile does not exist"
+    exit 1
+fi
+
+if [ -z "$outfile" ]; then
+    echo "Missing <out-file>"
+    echo $usage
+    exit 1
+fi
+
+if [ -f $outfile ]; then
+    echo "Removing old $outfile"
+    rm $outfile || { echo "Failed to remove $outfile" ; exit 1 ; }
+fi
+
+# Perform the indentation
+
+indent $options $infile -o $outfile
+
+