#!/bin/sh
set -e

# nacl/do
# D. J. Bernstein
# Public domain.

version=`cat version`
project=nacl

top="`pwd`/build"
bin="$top/bin"
lib="$top/lib"
include="$top/include"
work="$top/work"


# and work around bug in GNU sort
LANG=C
export LANG

rm -rf "$top"
mkdir -p "$top"
mkdir -p "$bin"
mkdir -p "$lib"
mkdir -p "$include"

exec >"$top/log"
exec 2>&1
exec 5>"$top/data"
exec </dev/null

echo "=== `date` === starting"

echo "=== `date` === building inttypes"
for target in int8 int16 int32 int64 uint8 uint16 uint32 uint64; do
  (
    echo "#ifndef crypto_${target}_h"
    echo "#define crypto_${target}_h"
    echo ""
    echo "#include <stdint.h>"
    echo ""
    echo "typedef ${target}_t crypto_${target};"
    echo ""
    echo "#endif"
  ) > "$include/crypto_$target.h"
done

echo "=== `date` === building randombytes"
rm -rf "$work"
mkdir -p "$work"
cp -pr randombytes/* "$work"
(
  cd "$work"
  
  cp devurandom.c randombytes-impl.c
  cp devurandom.h randombytes-impl.h
  $CC $CFLAGS -c randombytes-impl.c
  mkdir -p lib
  mv randombytes-impl.o lib/randombytes.o
  mkdir -p include
  mv randombytes-impl.h include/randombytes.h
)
cp -pr "$work"/lib/* "$lib"
cp -pr "$work"/include/* "$include"

rm -rf "$work"
mkdir -p "$work"
echo 'void crypto_'"$project"'_base(void) { ; }' > "$work/${project}_base.c"
( cd "$work" && $CC $CFLAGS -c ${project}_base.c )
$AR cr "$lib/lib${project}.a" "$work/${project}_base.o"
( $RANLIB "$lib/lib${project}.a" || exit 0 )

# loop over operations
cat OPERATIONS \
| while read o
do
  [ -d "$o" ] || continue

  # for each operation, loop over primitives
  ls "$o" \
  | sort \
  | while read p
  do
    [ -d "$o/$p" ] || continue
    op="${o}_${p}"

    startdate=`date +%Y%m%d`

    echo "=== `date` === $o/$p"

    rm -rf "$work"
    mkdir -p "$work"

    if [ -d "$o/$p/ref" ]; then
      implementationdir="$o/$p/ref"
    else
      implementationdir="$o/$p/portable"
    fi

    opi=`echo "$implementationdir" | tr ./- ___`
    
    echo "=== `date` === $implementationdir"

    cfiles=`ls "$implementationdir" | grep '\.c$' || :`
    sfiles=`ls "$implementationdir" | grep '\.[sS]$' || :`
    
    cp -p "$o"/*.c "$work"

    cp -pr "$implementationdir"/* "$work"

    cp -p MACROS "$work/MACROS"
    cp -p PROTOTYPES.c "$work/PROTOTYPES.c"

    (
      cd "$work"
      (
	echo "#ifndef ${o}_H"
	echo "#define ${o}_H"
	echo ""
	echo "#include \"${op}.h\""
	echo ""
	egrep "${o}"'$|'"${o}"'\(|'"${o}"'_' < MACROS \
	  | sed "s/$o/$op/" | while read mop
	do
	  echo "#define ${mop} ${mop}" | sed "s/$op/$o/"
	done
	echo "#define ${o}_PRIMITIVE \"${p}\""
	echo "#define ${o}_IMPLEMENTATION ${op}_IMPLEMENTATION"
	echo "#define ${o}_VERSION ${op}_VERSION"
	echo ""
	echo "#endif"
      ) > "$o.h"
      (
	echo "#ifndef ${op}_H"
	echo "#define ${op}_H"
	echo ""
	sed 's/[ 	]CRYPTO_/ '"${opi}"'_/g' < api.h
	echo '#ifdef __cplusplus'
	  #echo '#include <string>'
	  #egrep "${o}"'$|'"${o}"'\(|'"${o}"'_' < PROTOTYPES.cpp \
	  #    | sed "s/$o/$opi/"
	echo 'extern "C" {'
	echo '#endif'
	egrep "${o}"'$|'"${o}"'\(|'"${o}"'_' < PROTOTYPES.c \
	  | sed "s/$o/$opi/"
	echo '#ifdef __cplusplus'
	echo '}'
	echo '#endif'
	echo ""
	egrep "${o}"'$|'"${o}"'\(|'"${o}"'_' < MACROS \
	  | sed "s/$o/$opi/" | while read mopi
	do
	    echo "#define ${mopi} ${mopi}" | sed "s/$opi/$op/"
	done
	echo "#define ${op}_IMPLEMENTATION \"${implementationdir}\""
	echo "#ifndef ${opi}_VERSION"
	echo "#define ${opi}_VERSION \"-\""
	echo "#endif"
	echo "#define ${op}_VERSION ${opi}_VERSION"
	echo ""
	echo "#endif"
      ) > "$op.h"

      echo "=== `date` === $implementationdir $CC $CFLAGS"
      for f in $cfiles $sfiles
      do
	ok=1
	$CC $CFLAGS \
	    -I. -I"$include" \
	    -c "$f" >errors 2>&1 || ok=0
	( if [ `wc -l < errors` -lt 25 ]
	  then
	    cat errors
	  else
	    head errors
	    echo ...
	    tail errors
	  fi
	) \
	| while read err
	do
	  echo "$version $startdate $o $p fromcompiler $implementationdir $f $err" >&5
	done
	
	[ "$ok" = 1 ]
      done

      for f in *.o
      do
	mv "$f" "${opi}-$f"
      done
    )
  
    echo "=== `date` === $implementationdir $CC $CFLAGS finishing"

    $AR cr "$lib/lib${project}.a" "$work"/*.o \
    && ( $RANLIB "$lib/lib${project}.a" || exit 0 ) \
    && cp -p "$work/$op.h" "$include/$op.h" \
    && [ -f "$o/$p/selected" ] \
    && cp -p "$work/$o.h" "$include/$o.h" \
    || :
  done
done

echo "=== `date` === finishing"