dnl Copyright 2003,2008 Free Software Foundation, Inc.
dnl 
dnl This file is part of GNU Radio
dnl 
dnl GNU Radio is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3, or (at your option)
dnl any later version.
dnl 
dnl GNU Radio is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl 
dnl You should have received a copy of the GNU General Public License
dnl along with GNU Radio; see the file COPYING.  If not, write to
dnl the Free Software Foundation, Inc., 51 Franklin Street,
dnl Boston, MA 02110-1301, USA.

# $1 is $req_libusb1:
#   yes : check libusb-1.0 
#   no  : check libusb-0.12 
#   ""  : check libusb-0.12 


AC_DEFUN([USRP_LIBUSB], [
  libusbok=yes
  have_libusb1=no
  if test [x]$1 = xyes; then
    PKG_CHECK_MODULES(USB, libusb-1.0, [have_libusb1=yes], [
      AC_LANG_PUSH(C)

      AC_CHECK_HEADERS([libusb-1.0/libusb.h], [have_libusb1=yes],
                       [libusbok=no; AC_MSG_RESULT([USRP requires libusb-1.0. libusb.h not found. See http://www.libusb.org])])

      AC_SEARCH_LIBS(libusb_bulk_transfer, [usb], [USB_LIBS="$LIBS"],
                     [libusbok=no; AC_MSG_RESULT([USRP requires libusb-1.0. libusb_bulk_transfer not found. See http://www.libusb.org])])

      AC_LANG_POP
    ])
  else
    PKG_CHECK_MODULES(USB, libusb, [], [
      AC_LANG_PUSH(C)

      AC_CHECK_HEADERS([usb.h], [],
                       [libusbok=no; AC_MSG_RESULT([USRP requires libusb. usb.h not found. See http://www.libusb.org])])

      save_LIBS="$LIBS"
      case "$host_os" in
        darwin*)
          LIBS="$LIBS -lIOKit"
          ;;
        *) ;;
      esac

      AC_SEARCH_LIBS(usb_bulk_write, [usb], [USB_LIBS="$LIBS"],
                     [libusbok=no; AC_MSG_RESULT([USRP requires libusb. usb_bulk_write not found. See http://www.libusb.org])])

      LIBS="$save_LIBS"

      AC_LANG_POP
    ])
  fi

  if test x$libusbok = xyes; then
    if test x$have_libusb1 = xyes; then
      AC_DEFINE(HAVE_LIBUSB_1, [1], [Define if libusb-1.0 found])
    fi
    AC_OUTPUT_COMMANDS([
      case "$CONFIG_OTHER" in
      usrp*)
        outfile=usrp/host/include/usrp/$CONFIG_OTHER
        tmpfile=${outfile}T
        dirname="sed s,^.*/,,g"

        echo creating $outfile
        cat > $tmpfile << _EOF_
 /*  -*- Mode: C++ -*-
 * --------------------------------------------------------------------
 * DO NOT EDIT THIS FILE!  It has been automatically generated
 * from:    configure.in and `echo $outfile|$dirname`.in
 * on host: `(hostname || uname -n) 2>/dev/null | sed 1q`
 * --------------------------------------------------------------------
 *
 * Copyright 2005 Free Software Foundation, Inc.
 * 
 * This file is part of GNU Radio
 * 
 * GNU Radio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 * 
 * GNU Radio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */


_EOF_
        echo "#ifndef _`echo $outfile | $dirname | tr a-z. A-Z_`_" >> $tmpfile
        echo "#define _`echo $outfile | $dirname | tr a-z. A-Z_`_" >> $tmpfile
        echo >> $tmpfile

        case "$CONFIG_OTHER" in
        usrp_prims*)
          echo '#include <usrp/usrp_slots.h>' >> $tmpfile
          echo '#include <string>' >> $tmpfile
          echo >> $tmpfile
          ;;
        usrp_basic*)
          echo '#include <usrp/db_base.h>' >> $tmpfile
          echo '#include <usrp/usrp_slots.h>' >> $tmpfile
          echo '#include <string>' >> $tmpfile
          echo '#include <vector>' >> $tmpfile
          echo '#include <boost/utility.hpp>' >> $tmpfile
          echo '#include <usrp/usrp_subdev_spec.h>' >> $tmpfile
          echo >> $tmpfile
          ;;
        esac

        if test x$have_libusb1 = xno; then
          echo 'struct usb_device;'>> $tmpfile
          echo 'struct usb_dev_handle;'>> $tmpfile
          echo 'struct usb_device_descriptor;' >> $tmpfile
          echo 'typedef usb_device libusb_device;' >> $tmpfile
          echo 'typedef usb_dev_handle libusb_device_handle;' >> $tmpfile
          echo 'typedef usb_device_descriptor libusb_device_descriptor;' >> $tmpfile
          echo >> $tmpfile
        fi

        if test x$have_libusb1 = xyes; then
          echo 'struct libusb_device;' >> $tmpfile
          echo 'struct libusb_device_handle;' >> $tmpfile
          echo 'struct libusb_device_descriptor;' >> $tmpfile
          echo >> $tmpfile
        fi

        # The ugly but portable cpp stuff comes from here
        infile=usrp/host/include/usrp/`echo $outfile | sed 's,.*/,,g;s,\..*$,,g'`.h.in
        sed '/^##.*$/d' $infile >> $tmpfile 
        mv ${tmpfile} ${outfile}
        ;;
      esac

      ],[
      have_libusb1=$have_libusb1
    ])

    AC_SUBST(USB_LIBS)
    ifelse([$2], , :, [$2])
  else
    ifelse([$3], , :, [$3])
  fi
])