#!/bin/sh

# Prepare NaCl source files and include files for compilation with Serval DNA,
# possibly using the Android NDK to produce a JNI compatible library.
# Android and JNI complicate matters substantially, and prevent us just building
# the .a the way that NaCl was intended.  The cross compilation environment
# will play havoc for a start.

# Derived from:
# nacl/do
# D. J. Bernstein
# Public domain.

if [ ! -e OPERATIONS ]; then
  echo "OPERATIONS file not found, are you in the right directory?"
  exit 1
fi

project=nacl
work=build_android

# and work around bug in GNU sort
LANG=C
export LANG
	
rm -rf "$work"
mkdir -p "$work"

# PGS - Create a couple of missing files needed
cp randombytes/devurandom.h ${work}/randombytes.h
cat <<EOF > ${work}/crypto_uint32.h
#ifndef CRYPTO_UINT32
#define CRYPTO_UINT32

typedef unsigned int crypto_uint32;

#endif
EOF

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

  selected=''
  [ -f "$o/selected" ] && selected=`cat "$o/selected"`

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

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

      # for each operation primitive abi, loop over implementations
      find "$o/$p" -follow -name "api.h" \
      | grep /ref/ \
      | sort \
      | while read doth
      do
        implementationdir=`dirname $doth`
	opi=`echo "$implementationdir" | tr ./- ___`

	echo "=== `date` === $abi $implementationdir"

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

	cp -pr "$implementationdir"/* "$work/${opi}"

        rm ${work}/${opi}/measure.c
        rm ${work}/${opi}/try.c

	cp -p MACROS "$work/MACROS"
	cp -p PROTOTYPES.c "$work/PROTOTYPES.c"
	cp -p PROTOTYPES.cpp "$work/PROTOTYPES.cpp"
	cp $implementationdir/api.h "$work"

	(
	  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/"
	      echo "/* CHEESEBURGER ${mop} */"
	    done
	    echo "#define ${o}_PRIMITIVE \"${p}\""
	    echo "#define ${o}_IMPLEMENTATION ${op}_IMPLEMENTATION"
	    echo "#define ${o}_VERSION ${op}_VERSION"
	    echo ""
	    echo "#endif"
	  ) > "${opi}/$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/"
	      echo "/* POTATO ${mopi} $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"
          
          cd ..
	)
      done

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

    done
  done

# PGS - Remove testing files that we don't care about.
rm -f ${work}/measure.c ${work}/try.c

# DOC - Create nacl.h for lazy programmers
(cd ${work} ; find . -name \*.h -a \! -name mphlr.h -a \! -name nacl.h | sed -Ee 's,\./(.*),#include <\1>,') >${work}/nacl.h

# DOC - Create source list suitable for inclusion into a makefile
echo "NACL_SOURCES := \\" >${work}/sources.mk
(cd ${work} ; find . -mindepth 2 -name \*.c | sed -Ee 's,\./(.*),${NACL_BASE}/\1,' | sort | xargs echo) >>${work}/sources.mk

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