build: Add format checking script

Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>

CONTRIBUTING.md

@@ -30,6 +30,10 @@ the included indent script to format C code.
 
     ./tools/iindent your_files.c
 
+And use check format script before submitting.
+
+    ./tools/check_format.sh
+
 [mailing list]:https://lists.01.org/mailman/listinfo/isal
 [license]:LICENSE
 [signed-off-by language]:https://01.org/community/signed-process

tools/check_format.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+
+set -e
+rc=0
+verbose=0
+indent_args='-npro -kr -i8 -ts8 -sob -l95 -ss -ncs -cp1 -lps'
+
+while [ -n "$*" ]; do
+    case "$1" in
+	-v )
+	    verbose=1
+	    shift
+	    ;;
+	-h )
+	    echo check_format.sh [-h -v]
+	    exit 0
+	    ;;
+    esac
+done
+
+echo "Checking format of files in the git index at $PWD"
+if ! git rev-parse --is-inside-work-tree >& /dev/null; then
+    echo "Not in a git repo: Fail"
+    exit 1
+fi
+
+if hash indent && indent --version | grep -q GNU; then
+    echo "Checking C files for coding style..."
+    for f in `git ls-files '*.c'`; do
+	[ "$verbose" -gt 0 ] 2> /dev/null && echo "checking $f"
+	if ! indent $indent_args -st $f | diff -q $f - >& /dev/null; then
+	    echo "  File found with formatting issues: $f"
+	    [ "$verbose" -gt 0 ] 2> /dev/null && indent $indent_args -st $f | diff -u $f -
+	    rc=1
+	fi
+    done
+    [ "$rc" -gt 0 ] && echo "  Run ./tools/iindent on files"
+else
+	echo "You do not have indent installed so your code style is not being checked!"
+fi
+
+if hash grep; then
+    echo "Checking for dos and whitespace violations..."
+    for f in `git ls-files '*.c' '*.h' '*.asm' '*.inc' '*.am' '*.txt' '*.md' `; do
+	[ "$verbose" -gt 0 ] 2> /dev/null && echo "checking $f"
+	if grep -q '[[:space:]]$' $f ; then
+	    echo "  File found with trailing whitespace: $f"
+	    rc=1
+	fi
+	if grep -q $'\r' $f ; then
+	    echo "  File found with dos formatting: $f"
+	    rc=1
+	fi
+    done
+fi
+
+[ "$rc" -gt 0 ] && echo Format Fail || echo Format Pass
+
+exit $rc

tools/remove_trailing_whitespace

@@ -0,0 +1,2 @@
+#!/bin/sh
+sed -i -i.bak 's/[[:blank:]]*$//' "$@"