#!/bin/sh

SHARED=0
PREFIX=/usr/local

PNGLIB_FLG="-lpng"
ZLIB_FLG="-lz"

APPNAME="libhpdf"
RESNAME=
DEFNAME=
SOVER1='.1'
SOVER2='.0.0'
SHARED_EXT='.so'
LIB_EXT='.a'
OBJ_EXT='.o'
DEF_EXT='.def'
EXE_EXT=

CC=gcc
CFLAGS_DEMO="-Iinclude -O2 -Wall"
CFLAGS="-Iinclude -O2 -Wall" 
CFLAGS_ADD='-o $@'
CFLAGS_EXE='-o '
CFLAGS_USER=

LDFLAGS='-L. -L${PREFIX}/lib'
LDFLAGS_DEMO='-L.'
LDFLAGS_ADD=''

NOZLIB=no
NOPNGLIB=no

WIN32=no
NOCYGWIN=no
BCC32=no

LIB_CMD1=''
LIB_CMD2=''
SHARED_CMD1=''
SHARED_CMD2=''
SHARED_CMD3=''
SHARED_CMD4=''
SHARED_CMD5=''
INSTALL_CMD1=''
INSTALL_CMD2=''
INSTALL_CMD3=''
INSTALL_CMD4=''
INSTALL_CMD5=''
INSTALL_CMD6=''

COPY="cp -p"
DELETE="rm -f"
DELETE_ALL="rm -f src/*.o src/*.obj ./*.a ./*.so* ./*.lib demo/*.exe"

_SEP_='/'
_EXEC1_=''
_EXEC2_=''

while test $# -ge 1; do
case "$1" in
	-h* | --h*)
		echo 'usage: '
		echo './configure [--shared] [--prefix=PREFIX]'
		echo '  [--nozlib] [--nopnglib]'
		echo '  [--nocygwin (MinGW on cygwin only)]'
		exit 0;;
	-system-name=* | --system-name=*)
		SYSTEM_NAME=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
	-system-name | --system-name)
		SYSTEM_NAME="$2"; shift; shift;;
	-s* | --s*) SHARED=yes; shift;;
	-prefix=* | --prefix=*)
		PREFIX=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
	-prefix | --prefix)
		PREFIX="$2"; shift; shift;;
	-nozlib | --nozlib)
		NOZLIB=yes;shift;;
	-nopnglib | --nopnglib)
		NOPNGLIB=yes;shift;;
	-nocygwin | --nocygwin)
		NOCYGWIN=yes;shift;;
	-cflags=* | --cflags=*)
		CFLAGS_USER=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
	-cflags | --cflags)
		CFLAGS_USER="$2"; shift; shift;;
	*)
		echo "ERROR: unknown option $1."
		exit 1;;
esac
done

if test ${SYSTEM_NAME}; then
	echo "SYSTEM_NAME=${SYSTEM_NAME}"
else
	SYSTEM_NAME=`uname -s 2>/dev/null || echo unknown`
	echo "SYSTEM_NAME=${SYSTEM_NAME}"
fi

STDCALL=no

case "${SYSTEM_NAME}" in
	CYGWIN*)
		#
		# options for gcc
		#
		# -Wall : All of the above -W options combined
		# --kill-at : strip the stdcall suffixes from symbols.
		#
		SHARED_CMD1='$(CC) -Wall -shared -o $(SONAME) $(OBJS) $(DEFNAME) $(RESNAME) -Wl,--kill-at,--enable-stdcall-fixup $(LDFLAGS)'
		SHARED_CMD2='dlltool -k -d $(DEFNAME) -l $(LIBNAME)'
		SHARED_CMD3='strip $(SONAME)'
		SHARED_CMD4='cp -p $(SONAME) demo'
		SOVER1=''
		SOVER2=''
		_EXEC1_='cd demo/ ; '

		SHARED_EXT='.dll'
		if test ${NOCYGWIN} = yes; then
			CFLAGS="${CFLAGS} -Iwin32/include -mno-cygwin"
			CFLAGS_DEMO="${CFLAGS_DEMO} -mno-cygwin" 
			if test ${SHARED} = yes; then
				LDFLAGS="-Lwin32/mingw ${LDFLAGS}"
				SHARED_CMD1="${SHARED_CMD1} -mno-cygwin"
			else
				LDFLAGS_DEMO="-Lwin32/mingw ${LDFLAGS_DEMO}"
			fi
			DEFNAME=win32/mingw/libhpdf.def
			RESNAME=win32/mingw/libhpdf_mingw.res
			STDCALL=yes
		else
			DEFNAME=win32/mingw/libhpdf_cdecl.def
			RESNAME=win32/mingw/libhpdf_cygwin.res
		fi
		;;	
	MINGW*)
		SHARED_CMD1='$(CC) -Wall -shared -o $(SONAME) $(OBJS) $(DEFNAME) $(RESNAME) -Wl,--kill-at,--enable-stdcall-fixup $(LDFLAGS)'
		SHARED_CMD2='dlltool -k -d $(DEFNAME) -l $(LIBNAME)'
		SHARED_CMD3='strip $(SONAME)'
		SHARED_CMD4='cp -p $(SONAME) demo'
		_EXEC1_='cd demo/ ; '
		
		CFLAGS="${CFLAGS} -Iwin32/include -mno-cygwin"
		CFLAGS_DEMO="${CFLAGS_DEMO} -mno-cygwin" 
		if test ${SHARED} = yes; then
			LDFLAGS="-Lwin32/mingw ${LDFLAGS}"
			SHARED_CMD1="${SHARED_CMD1} -mno-cygwin"
		else
			LDFLAGS_DEMO="-Lwin32/mingw ${LDFLAGS_DEMO}"
		fi

		SHARED_EXT='.dll'
		EXE_EXT='.exe'
		STDCALL=yes
		DEFNAME=win32/mingw/libhpdf.def
		RESNAME=win32/mingw/libhpdf_mingw.res
		;;	
	MSVC*)
		#
		# options for msvc++
		#
		# /LD : Create .DLL
		# /MD : link with MSVCRT.LIB
		# /MT : link with LIBCMT.LIB
		# /nologo : suppress copyright message
		# /O2 : maximize speed
		# /Fe : name executable file
		#
		CFLAGS='-MT -nologo -O2 -Iinclude -Iwin32\\include'
		CFLAGS_DEMO=${CFLAGS}
		LDFLAGS='/LIBPATH:win32\\msvc' 
		LDFLAGS_DEMO='/link /LIBPATH:. /LIBPATH:win32\\msvc' 
		WIN32=yes
		CC=cl
		CFLAGS_ADD='-Fo$@'
		CFLAGS_EXE="-Fe"
		LIB_CMD1='if exist *.lib del *.lib'
		LIB_CMD2='lib -out:$@ $(OBJS)'
		RESNAME=win32/msvc/libhpdf.res
		DEFNAME=win32/msvc/libhpdf.def
		SHARED_CMD1='-@if exist $(SONAME) del $(SONAME)'
		SHARED_CMD2='-@if exist $(LIBAME) del $(LIBNAME)'
		SHARED_CMD3='link /DLL /OUT:$(SONAME) $(OBJS) $(RESNAME) $(LDFLAGS) /DEF:$(DEFNAME)'
		SHARED_CMD4='rename '${APPNAME}.lib' $(LIBNAME)'
		SHARED_CMD5='copy $(SONAME) demo'
		SHARED_EXT='.dll'
		STDCALL=yes
		;;
	BCC*)
		#
		# bcc32 options
		#
		# -d : Merge duplicate strings
		# -Ox : Optimizations
		# -wxxx : Warning control
		# -VM : maintain compatibility with MS VC++
		#
		# implib options
		#
		# -f : use name for import.
		#
		CFLAGS='-WM -O2 -d -q -w-8057 -w-8012 -Iinclude -Iwin32\\include -nsrc'
		CFLAGS_DEMO='-WM -O2 -d -q -w-8057 -w-8012 -Iinclude -Iwin32\\include'
		LDFLAGS='/Lwin32\\bcc32' 
		LDFLAGS_DEMO='/L. /Lwin32\\bcc32'
		WIN32=yes
		CC=bcc32
		CFLAGS_ADD=''
		CFLAGS_EXE='-e'
		LIB_CMD1='if exist *.lib del *.lib'
		LIB_CMD2='tlib \/a $@ +$(OBJS),$@.txt'
		SHARED_CMD1='-@if exist libhpdf* del libhpdf*'
		SHARED_CMD2='$(CC) -O2 -WD -e$(SONAME) -DHPDF_DLL_MAKE $(LDFLAGS) $(OBJS)'
		SHARED_CMD3='implib -f $(LIBNAME) $(SONAME)'
		SHARED_CMD4='copy $(SONAME) demo'
		SHARED_EXT='.dll'
		STDCALL=yes
		RESNAME=win32/bcc32/libhpdf.res
		BCC32=yes
		;;
	*)
		#
		# options for generic gcc
		# -fPIC : emit position-independent code
		#
		echo 'using generic-gcc template'
		
		# commands to make shared-library #
		if test $SHARED = yes; then
			CFLAGS="${CFLAGS} -fPIC"
			SHARED_CMD1='$(CC) -Wall -shared -o $(SONAME)$(SOVER1)$(SOVER2) $(OBJS) $(LDFLAGS) -Wl,-soname,$(SONAME)$(SOVER1)'
			SHARED_CMD2='ln -sf $(SONAME)$(SOVER1)$(SOVER2) $(SONAME)$(SOVER1)'
			SHARED_CMD3='ln -sf $(SONAME)$(SOVER1) $(SONAME)'
			_EXEC1_='export LD_LIBRARY_PATH=.. ; cd demo/ ; '
		else
			_EXEC1_='cd demo/ ; '
		fi
		LDFLAGS_DEMO="${LDFLAGS_DEMO}"
		LDFLAGS="${LDFLAGS}"
		LDFLAGS_ADD='-lm'

		;;
esac

if test $WIN32 = yes; then
	if test $SHARED = yes; then
		 LIBNAME="${APPNAME}_dll"
	fi
	SHARED_EXT='.dll'
	LIB_EXT='.lib'
	OBJ_EXT='.obj'
	EXE_EXT='.exe'
	PNGLIB_FLG="libpng.lib"
	ZLIB_FLG="zlib.lib"
	CFLAGS_DEMO="${CFLAGS_DEMO} -D__WIN32__"
	LIBHPDF_FLG="${APPNAME}${LIB_EXT}"
	COPY=copy
	DELETE="del"
#DELETE_ALL='del src\\*.o src\\*.obj .\\*.a .\\*.so* .\\*.dll demo\\*.exe'
	DELETE_ALL='if exist src\\*.obj del src\\*.obj \n\tif exist src\\*.o del src\\*.o \n\tif exist *.lib del *.lib \n\tif exist *.dll del *.dll \n\tif exist demo\\*.exe del demo\\*.exe \n\tif exist demo\\*.tds del demo\\*.tds \n\tif exist *.obj del *.obj'
	_SEP_='\\'
	_EXEC1_='cd demo \n\t'
	_EXEC2_='\n\tcd ..'

	INSTALL_CMD0='echo target "install" is not supported on windows platforms.'
else
	LIB_CMD1='ar rc $(LIBNAME) $(OBJS)'
	LIB_CMD2='ranlib $(LIBNAME)'
	LIBHPDF_FLG="-l`echo ${APPNAME} | sed 's/lib//'`"

	# commands to install #
	echo "INCDIR=${PREFIX}/include"
	echo "LIBDIR=${PREFIX}/lib"
	INSTALL_CMD0='if [ ! -d $(PREFIX) ]; then mkdir -p $(PREFIX); fi'
	INSTALL_CMD1='if [ ! -d $(PREFIX)/include ]; then mkdir -p $(PREFIX)/include; fi'
	INSTALL_CMD2='if [ ! -d $(PREFIX)/lib ]; then mkdir -p $(PREFIX)/lib; fi'
	if test $SHARED = yes; then
		INSTALL_CMD3='cp include/hpdf.h include/hpdf_consts.h include/hpdf_types.h $(PREFIX)/include/; chmod 644 $(PREFIX)/include/hpdf*.h'
		INSTALL_CMD4='cp -p $(SONAME)$(SOVER1)$(SOVER2) $(PREFIX)/lib/'
		if test $SHARED_EXT != '.dll'; then
			INSTALL_CMD5='ln -sf $(SONAME)$(SOVER1)$(SOVER2) $(PREFIX)/lib/$(SONAME)$(SOVER1)'
			INSTALL_CMD6='ln -sf $(SONAME)$(SOVER1) $(PREFIX)/lib/$(SONAME)'
		else
			INSTALL_CMD5='cp -p $(LIBNAME) $(PREFIX)/lib/'
		fi
	else
		INSTALL_CMD3='cp include/hpdf*.h $(PREFIX)/include/; chmod 644 $(PREFIX)/include/hpdf*.h'
		INSTALL_CMD4='cp -p $(LIBNAME) $(PREFIX)/lib/'
	fi	
fi

LDFLAGS_DEMO="$LDFLAGS_DEMO $LIBHPDF_FLG"

# PNGLIB #
if test $NOPNGLIB != yes; then
	if test $NOZLIB = yes; then
		echo "ERROR: cannot use pnglib without zlib"
		exit 1
	fi
	LDFLAGS="$LDFLAGS $PNGLIB_FLG"
	if test $SHARED != yes; then
		LDFLAGS_DEMO="$LDFLAGS_DEMO $PNGLIB_FLG"
	fi
#	fi
else
	CFLAGS="${CFLAGS} -DHPDF_NOPNGLIB"
	CFLAGS_DEMO="${CFLAGS_DEMO} -DHPDF_NOPNGLIB"
fi

# ZLIB #
if test $NOZLIB != yes; then
	LDFLAGS="$LDFLAGS $ZLIB_FLG"
	if test $SHARED != yes; then
		LDFLAGS_DEMO="$LDFLAGS_DEMO $ZLIB_FLG"
	fi
#	fi
else
	CFLAGS="${CFLAGS} -DHPDF_NOZLIB"
	CFLAGS_DEMO="${CFLAGS_DEMO} -DHPDF_NOZLIB"
fi

# create extconf.rb
if test $WIN32 != yes; then
    if test $NOPNGLIB = yes; then
        if test $NOZLIB = yes; then
            cp if/ruby/extconf.rb.nozlib if/ruby/extconf.rb
        else
            cp if/ruby/extconf.rb.nopnglib if/ruby/extconf.rb
        fi
    else
        cp if/ruby/extconf.rb.all if/ruby/extconf.rb
    fi
fi

# shared library "
if test $SHARED = yes; then
	if test $SHARED_EXT = '.dll'; then
		if test $STDCALL = 'yes'; then
			CFLAGS="$CFLAGS -DHPDF_DLL_MAKE"
			CFLAGS_DEMO="$CFLAGS_DEMO -DHPDF_DLL"
		else
			CFLAGS="$CFLAGS -DHPDF_DLL_MAKE_CDECL"
			CFLAGS_DEMO="$CFLAGS_DEMO -DHPDF_DLL_CDECL"
		fi
	else
		CFLAGS="$CFLAGS -DHPDF_SHARED_MAKE"
		CFLAGS_DEMO="$CFLAGS_DEMO -DHPDF_SHARED"
	fi
	LIBTARGET=${APPNAME}${SHARED_EXT}
else
	LIBTARGET=${APPNAME}${LIB_EXT}
fi

LDFLAGS_DEMO="$LDFLAGS_DEMO $LDFLAGS_ADD"
LDFLAGS="$LDFLAGS $LDFLAGS_ADD"

if test $BCC32 = yes; then
	LDFLAGS_DEMO1=$LDFLAGS_DEMO
	LDFLAGS_DEMO2=''
else
	LDFLAGS_DEMO1=''
	LDFLAGS_DEMO2=$LDFLAGS_DEMO
fi

CFLAGS="$CFLAGS $CFLAGS_USER"

echo "CC=${CC}"
echo "PREFIX=${PREFIX}"
echo "LIBNAME=${APPNAME}${LIB_EXT}"
echo "SONAME=${APPNAME}${SHARED_EXT}"
echo "DEFNAME=${DEFNAME}"
echo "LIBTARGET=${LIBTARGET}"
echo "CFLAGS=${CFLAGS}"
echo "CFLAGS_DEMO=${CFLAGS_DEMO}"
echo "LDFLAGS=${LDFLAGS}"
echo "LDFLAGS_DEMO=${LDFLAGS_DEMO}"

echo "creating Makefile"

cat "script/Makefile.in" | sed "
/^CC *=/s%=.*%=${CC}%
/^PREFIX *=/s%=.*%=${PREFIX}%
/^LIBNAME *=/s%=.*%=${APPNAME}${LIB_EXT}%
/^SOVER1 *=/s%=.*%=${SOVER1}%
/^SOVER2 *=/s%=.*%=${SOVER2}%
/^SONAME *=/s%=.*%=${APPNAME}${SHARED_EXT}%
/^DEFNAME *=/s%=.*%=${DEFNAME}%
/^RESNAME *=/s%=.*%=${RESNAME}%
/^LIBTARGET *=/s%=.*%=${LIBTARGET}%
/^CFLAGS *=/s%=.*%=${CFLAGS}%
/^CFLAGS_DEMO *=/s%=.*%=${CFLAGS_DEMO}%
/^CFLAGS_EXE *=/s%=.*%=${CFLAGS_EXE}%
/^LDFLAGS *=/s%=.*%=${LDFLAGS}%
/^LDFLAGS_DEMO1 *=/s%=.*%=${LDFLAGS_DEMO1}%
/^LDFLAGS_DEMO2 *=/s%=.*%=${LDFLAGS_DEMO2}%
" > Makefile.tmp

cat Makefile.tmp | sed "
s%_CFLAGS_ADD%${CFLAGS_ADD}%g;
s%_OBJ_EXT%${OBJ_EXT}%g;
s%_EXE_EXT%${EXE_EXT}%g;
s%_COPY%${COPY}%g;
s%_DELETE_ALL%${DELETE_ALL}%g;
s%_DELETE%${DELETE}%g;
s%_SHARED_CMD1%${SHARED_CMD1}%g;
s%_SHARED_CMD2%${SHARED_CMD2}%g;
s%_SHARED_CMD3%${SHARED_CMD3}%g;
s%_SHARED_CMD4%${SHARED_CMD4}%g;
s%_SHARED_CMD5%${SHARED_CMD5}%g;
s%_INSTALL_CMD0%${INSTALL_CMD0}%g;
s%_INSTALL_CMD1%${INSTALL_CMD1}%g;
s%_INSTALL_CMD2%${INSTALL_CMD2}%g;
s%_INSTALL_CMD3%${INSTALL_CMD3}%g;
s%_INSTALL_CMD4%${INSTALL_CMD4}%g;
s%_INSTALL_CMD5%${INSTALL_CMD5}%g;
s%_INSTALL_CMD6%${INSTALL_CMD6}%g;
s%_LIB_CMD1%${LIB_CMD1}%g;
s%_LIB_CMD2%${LIB_CMD2}%g;
s%_SEP_%${_SEP_}%g;
s%_EXEC1_%${_EXEC1_}%g;
s%_EXEC2_%${_EXEC2_}%g;
s%_SEP_%${_SEP_}%g;
" > Makefile

echo "done."

exit 0