#!/bin/sh

# check for bash...

if [ "$(echo -n)" = '-n' ]
then
 SHELL=$(which bash sh 2> /dev/null | head -n 1)
 exec $SHELL $0 "$@"
fi


#set -x

TF_C=testit.c
TF_E=./testit
LDPATH=''
INCPATH=''

SYSNAME='unknown'
SHARED='-shared'

echo -n "checking for C compiler... "
CC=$(which gcc cc 2> /dev/null | head -n 1)
if [ "$CC" = '' ]
then
 echo 'none'
 exit 1;
fi
echo $CC

#Makefile.conf not yet open, write it later

echo -n "checking for sysname... "
SYSNAME=$(uname -s)
echo "$SYSNAME"

while [ "$1" != '' ]
do
 case "$1" in
  '--help')
   echo '--help'
   echo '--ldpath DIR'
   echo '--incpath DIR'
   echo '--addpath DIR'
   echo '--no-LIB'
   exit 0;
  ;;
  '--ldpath')
   LDPATH="$LDPATH -L$2"
   shift;
  ;;
  '--incpath')
   INCPATH="$INCPATH -I$2"
   shift;
  ;;
  '--addpath')
   LDPATH="$LDPATH -L$2/lib/"
   INCPATH="$INCPATH -I$2/include/"
   shift;
  ;;
  '--no-'*)
   lib=$(echo "$1" | sed 's/^--no-//')
   eval no_lib_$lib=true
  ;;
 esac;

 shift;
done


CCTF="$CC $LDPATH $INCPATH -o $TF_E $TF_C"

test_lib () {
 echo > $TF_C

 echo -n "checking for $1... "
 shift;

 LIBS=''

 while [ "$1" != '--' ]
 do
  LIBS="$LIBS -l$1"
  shift;
 done

 shift;

 while [ "$1" != '' ]
 do
  echo "#include <$1>" >> $TF_C
  shift;
 done

 echo 'int main (void) { return 0; }' >> $TF_C

 $CCTF $LIBS 2> /dev/null;

 R=$?

 if [ "$R" = '0' ]
 then
  echo 'yes'
 else
  echo 'no'
 fi

 return $R
}

test_lib_defmake () {
 def="$1"
 subdir="$2"
 shift
 shift
 lib="$2"

 [ "$subdir" = '%' ] && subdir=''

 if [ "$lib" != '--' ]
 then
  eval _no="\$no_lib_$lib";

  if [ "$_no" != '' ]
  then
    echo "checking for $1... disabled by user"
   [ "$subdir" != '' ] && \
    echo "subdir_$subdir=" >&4
   echo "lib_$lib=" >&4
   return;
  fi
 fi

 if test_lib $@
 then
  echo "#define $def"            >&3
  [ "$subdir" != '' ] && \
   echo "subdir_$subdir=$subdir" >&4
  echo "lib_$lib=-l$lib" >&4
 else
  [ "$subdir" != '' ] && \
   echo "subdir_$subdir=" >&4
  echo "lib_$lib=" >&4
 fi
}

exec 3> config.h 4> Makefile.conf

# now write the cc name to Makefile.conf
echo "CC=$CC" >&4
echo "LDPATH=$LDPATH" >&4
echo "INCPATH=$INCPATH" >&4

if [ "$SYSNAME" = 'Darwin' ]
then
 echo "Adding $SYSNAME shared lib arguments..."
 SHARED="$SHARED -fno-common -dynamiclib -compatibility_version 0.1 -current_version 0.1.0"
 INCPATH="$INCPATH -fno-common"
fi

echo "SHARED=$SHARED" >&4

cat >&3 << EOF
//config.h:

#ifndef _ROARAUDIO_CONFIG_H_
#define _ROARAUDIO_CONFIG_H_

EOF

{
 echo '/* uname: ' $(uname -a) '*/'
 echo '/* Date : ' $(date)  '*/'
 echo
} >&3

test_lib 'Math Library' m          -- math.h                         && echo '#define ROAR_HAVE_LIBM' >&3
if test_lib 'realtime Library' rt -- sys/mman.h mqueue.h semaphore.h
then
 {
  echo '#define ROAR_HAVE_LIBRT'
  echo '#define ROAR_NEED_LIBRT'
 } >&3
fi

echo >&3

#                #define                 subdir       name          -lxxx      -- header
test_lib_defmake ROAR_HAVE_ESD           libroaresd   EsounD        esd        -- esd.h
test_lib_defmake ROAR_HAVE_LIBAO         %            libao         ao         -- ao/ao.h ao/plugin.h
test_lib_defmake ROAR_HAVE_LIBVORBIS     %            libvorbis     vorbis     -- vorbis/codec.h
test_lib_defmake ROAR_HAVE_LIBVORBISFILE %            libvorbisfile vorbisfile -- vorbis/vorbisfile.h
test_lib_defmake ROAR_HAVE_LIBVORBISENC  %            libvorbisenc  vorbisenc  -- vorbis/vorbisenc.h
test_lib_defmake ROAR_HAVE_LIBSPEEX      %            libspeex      speex      -- speex/speex.h speex/speex_stereo.h
test_lib_defmake ROAR_HAVE_LIBCELT       %            libcelt       celt       -- celt/celt.h celt/celt_header.h
test_lib_defmake ROAR_HAVE_LIBOGGZ       %            liboggz       oggz       -- oggz/oggz.h
test_lib_defmake ROAR_HAVE_LIBSNDFILE    %            libsndfile    sndfile    -- sndfile.h
test_lib_defmake ROAR_HAVE_LIBFISHSOUND  roarfish     libfishsound  fishsound  -- fishsound/fishsound.h
test_lib_defmake ROAR_HAVE_LIBSHOUT      %            libshout      shout      -- shout/shout.h
test_lib_defmake ROAR_HAVE_LIBPULSE      libroarpulse libpulse      pulse      -- pulse/pulseaudio.h pulse/simple.h
test_lib_defmake ROAR_HAVE_LIBY2         libroaryiff  libyiff       Y2         -- Y2/Y.h Y2/Ylib.h
test_lib_defmake ROAR_HAVE_LIBARTSC      libroararts  libartsc      artsc      -- kde/artsc/artsc.h
test_lib_defmake ROAR_HAVE_LIBDNET       %            libdnet       dnet       -- sys/socket.h netdnet/dn.h netdnet/dnetdb.h
test_lib_defmake ROAR_HAVE_IPX           %            IPX                      -- netipx/ipx.h

# add a better test here
test_lib 'linux sendfile()'       -- sys/sendfile.h && echo '#define ROAR_HAVE_LINUX_SENDFILE' >&3


echo -n 'checking for mlock()... '

echo '#include <sys/mman.h>' > $TF_C
echo 'int main (void) { mlock((void*)0, 0); return 0; }' >> $TF_C

if $CCTF 2> /dev/null;
then
 echo '#define ROAR_HAVE_MLOCK' >&3
 echo yes
else
 echo no
fi

echo -n 'checking for inline funcs... '

echo 'inline int test (void) { return 0; }' > $TF_C
echo 'int main (void) { return test(); }'  >> $TF_C

if $CCTF 2> /dev/null;
then
 echo '#define ROAR_HAVE_INLINE' >&3
 echo yes
else
 echo no
fi

echo -n 'checking for safe 32 bit integer overflow... '

cat > $TF_C << EOF
#include <stdio.h>
#include <stdint.h>
#define TYPE uint32_t
#define MAX  ((TYPE)4294967295U)

int main (void) {
 TYPE a = MAX;

 a += 2;

 if ( a == 1 ) {
  printf("#define ROAR_HAVE_SAFE_OVERFLOW\n");
  return 0;
 }

 return 1;
}
EOF

if $CCTF 2> /dev/null;
then
 $TF_E >&3
 if [ "$?" = '0' ]
 then
  echo yes
 else
  echo no
 fi
else
 echo 'no (can not compile!, no stdint.h?)'
fi

echo -n 'checking if cp supports -v... '
if cp -v --help > /dev/null 2> /dev/null
then
 echo "cp_v=-v" >&4
 echo yes
else
 echo "cp_v=" >&4
 echo no
fi


cat >&3 << EOF

#endif

//ll
EOF

rm -f $TF_C $TF_E

mv config.h include/roaraudio/
echo 'config.h created and moved into include/roaraudio/'

#ll