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# generate-python-exceptions: generate error handling code for Python bindings
my $copyright = <<'END';
Copyright (C) 2003,2004,2006,2007,2008,2009,2012 Olly Betts
Copyright (C) 2007 Lemur Consulting Ltd
Copyright (C) 2007 Richard Boulton
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;
my @allclasses = (@baseclasses, @classes);
my @posting_source_virtual_methods = qw(
get_termfreq_min
get_termfreq_est
get_termfreq_max
get_maxweight
get_weight
next
skip_to
check
at_end
get_docid
get_description
init
name
);
my @matchspy_virtual_methods = qw(
name
merge_results
get_description
);
open FD, ">except.i" or die $!;
$copyright =~ s/^/ */mg;
print FD <<"EOF";
/** \@file
* \@brief Custom Python exception handling.
*/
/* Warning: This file is generated by $0
* - do not modify directly!
*
$copyright */
EOF
print FD <<'EOF';
namespace Xapian {
%exceptionclass Error;
%ignore Error::get_description;
%extend Error {
std::string __str__() const {
std::string desc($self->get_msg());
if (!$self->get_context().empty()) {
desc += " (context: ";
desc += $self->get_context();
desc += ')';
}
if ($self->get_error_string()) {
desc += " (";
desc += $self->get_error_string();
desc += ')';
}
return desc;
}
}
EOF
for (@allclasses) {
my ($class) = @{$_};
print FD "%exceptionclass $class;\n";
}
print FD <<'EOF';
}
%ignore Xapian::Error::Error(const Error&);
%include "xapian/error.h"
%{
namespace Xapian {
SWIGEXPORT void SetPythonException() {
try {
throw;
} catch (Swig::DirectorException &) {
/* This happens if a director raised an exception. The standard SWIG
* director exception handling code sets the Python error state if
* necessary, so we don't need to do anything. */
EOF
for (reverse @allclasses) {
my ($class) = @{$_};
print FD <<"EOF";
} catch (const Xapian::$class &e) {
SWIG_Python_Raise(SWIG_NewPointerObj((new Xapian::$class(e)),
SWIGTYPE_p_Xapian__$class,
SWIG_POINTER_OWN),
"Xapian::$class",
SWIGTYPE_p_Xapian__$class);
EOF
}
print FD <<'EOF';
} catch (const Xapian::Error &e) {
SWIG_Python_Raise(SWIG_NewPointerObj((new Xapian::Error(e)),
SWIGTYPE_p_Xapian__Error,
SWIG_POINTER_OWN),
"Xapian::Error",
SWIGTYPE_p_Xapian__Error);
} catch (const std::exception& e) {
SWIG_Error(SWIG_RuntimeError, e.what());
} catch (...) {
SWIG_Error(SWIG_UnknownError, "unknown error in Xapian");
}
}
}
%}
/* 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 {
$action
} catch (...) {
Xapian::SetPythonException();
SWIG_fail;
}
}
/* If a Python error is raised by a call to a director function, the following
* code should cause a C++ exception to be thrown.
*/
%feature("director:except") {
if ($error != NULL) {
throw Swig::DirectorMethodException();
}
}
/* vim:syntax=cpp:set noexpandtab: */
EOF
close FD or die $!;
|
