# generate-tcl-exceptions: generate error handling code for Tcl bindings
my $copyright = <<'END';
 Copyright (c) 2006,2007,2011,2012 Olly Betts

 This program 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 2 of the
 License, or (at your option) any later version.

 This program 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 this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
END

use strict;
use exception_data;

open FD, ">except.i" or die $!;

$copyright =~ s/^/ */mg;

print FD <<"EOF";
%{
/** \@file
 * \@brief Custom Tcl exception handling.
 */
/* Warning: This file is generated by $0
 * - do not modify directly!
 *
$copyright */

EOF

print FD <<'EOF';
#include <exception>

static int XapianTclHandleError(Tcl_Interp * interp, const Xapian::Error &e) {
    Tcl_ResetResult(interp);
    Tcl_SetErrorCode(interp, "XAPIAN", e.get_type(), NULL);
    Tcl_AppendResult(interp, e.get_msg().c_str(), NULL);
    return TCL_ERROR;
}

static int XapianTclHandleError(Tcl_Interp * interp, const std::exception &e) {
    Tcl_ResetResult(interp);
    Tcl_SetErrorCode(interp, "std::exception", NULL);
    Tcl_AppendResult(interp, e.what(), NULL);
    return TCL_ERROR;
}

static int XapianTclHandleError(Tcl_Interp * interp) {
    Tcl_ResetResult(interp);
    Tcl_SetErrorCode(interp, "XAPIAN ?", NULL);
    Tcl_AppendResult(interp, "Unknown Error", NULL);
    return TCL_ERROR;
}

%}

/* Functions and methods which are marked as "nothrow": */
EOF

chdir($INC[0]);
exception_data::for_each_nothrow(sub { print FD "%exception $_[0];\n" });

print FD <<'EOF';

%exception {
    try {
	$function
    } catch (const Xapian::Error &e) {
	return XapianTclHandleError(interp, e);
    } catch (const std::exception &e) {
	return XapianTclHandleError(interp, e);
    } catch (...) {
	return XapianTclHandleError(interp);
    }
}
EOF

close FD or die $!;
