#!/bin/sh
  
  SPATCH="`which ${SPATCH:=spatch}`"

  if [ "$C" = "1" -o "$C" = "2" ]; then
      ONLINE=1
  
  # This requires Coccinelle >= 0.2.3
  #    FLAGS="-ignore_unknown_options -very_quiet"
  #    OPTIONS=$*

      if [ "$KBUILD_EXTMOD" = "" ] ; then
          # Workaround for Coccinelle < 0.2.3
          FLAGS="-I $srctree/include -very_quiet"
          shift $(( $# - 1 ))
          OPTIONS=$1
      else
  	echo M= is not currently supported when C=1 or C=2
  	exit 1
      fi

  else
      ONLINE=0
      FLAGS="-very_quiet"

      if [ "$KBUILD_EXTMOD" = "" ] ; then
          OPTIONS="-dir $srctree"
      else
          OPTIONS="-dir $KBUILD_EXTMOD -patch $srctree -I $srctree/include -I $KBUILD_EXTMOD/include"
      fi

  fi

  if [ ! -x "$SPATCH" ]; then
      echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
      exit 1
  fi
  
  if [ "$MODE" = "" ] ; then

      if [ "$ONLINE" = "0" ] ; then

  	echo 'You have not explicitly specified the mode to use. Using default "chain" mode.'
  	echo 'All available modes will be tried (in that order): patch, report, context, org'

  	echo 'You can specify the mode with "make coccicheck MODE=<mode>"'

      fi

      MODE="chain"

  elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then

      FLAGS="$FLAGS -no_show_diff"

  fi

  if [ "$ONLINE" = "0" ] ; then
      echo ''
      echo 'Please check for false positives in the output before submitting a patch.'
      echo 'When using "patch" mode, carefully review the patch before submitting it.'
      echo ''
  fi

  coccinelle () {

      COCCI="$1"

  
      OPT=`grep "Option" $COCCI | cut -d':' -f2`

  #   The option '-parse_cocci' can be used to syntactically check the SmPL files.

  #
  #    $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null

      if [ "$ONLINE" = "0" ] ; then

  	FILE=`echo $COCCI | sed "s|$srctree/||"`

  	echo "Processing `basename $COCCI`"
  	echo "with option(s) \"$OPT\""
  	echo ''

  	echo 'Message example to submit a patch:'

  	sed -ne 's|^///||p' $COCCI

  	if [ "$MODE" = "patch" ] ; then
  	    echo ' The semantic patch that makes this change is available'
  	elif [ "$MODE" = "report" ] ; then
  	    echo ' The semantic patch that makes this report is available'
  	elif [ "$MODE" = "context" ] ; then
  	    echo ' The semantic patch that spots this code is available'
  	elif [ "$MODE" = "org" ] ; then
  	    echo ' The semantic patch that makes this Org report is available'
  	else
  	    echo ' The semantic patch that makes this output is available'
  	fi

  	echo " in $FILE."
  	echo ''
  	echo ' More information about semantic patching is available at'
  	echo ' http://coccinelle.lip6.fr/'
  	echo ''

  	if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then
  	    echo 'Semantic patch information:'
  	    sed -ne 's|^//#||p' $COCCI
  	    echo ''
  	fi

      fi

      if [ "$MODE" = "chain" ] ; then

  	$SPATCH -D patch   $FLAGS -sp_file $COCCI $OPT $OPTIONS               || \
  	$SPATCH -D report  $FLAGS -sp_file $COCCI $OPT $OPTIONS -no_show_diff || \
  	$SPATCH -D context $FLAGS -sp_file $COCCI $OPT $OPTIONS               || \
  	$SPATCH -D org     $FLAGS -sp_file $COCCI $OPT $OPTIONS -no_show_diff || exit 1

      else

  	$SPATCH -D $MODE   $FLAGS -sp_file $COCCI $OPT $OPTIONS || exit 1

      fi

  }
  
  if [ "$COCCI" = "" ] ; then
      for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do

  	coccinelle $f

      done
  else

      coccinelle $COCCI

  fi