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|
/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Ruby-specific enhancements to MapScript
* Author:
*
******************************************************************************
*
* Ruby-specific mapscript code has been moved into this
* SWIG interface file to improve the readibility of the main
* interface file. The main mapscript.i file includes this
* file when SWIGRUBY is defined (via 'swig -ruby ...').
*
*****************************************************************************/
/******************************************************************************
* Simple Typemaps
*****************************************************************************/
/* To support imageObj::getBytes */
%typemap(out) gdBuffer {
$result = rb_str_new($1.data, $1.size);
msFree($1.data);
}
/**************************************************************************
* MapServer Errors and Ruby Exceptions
**************************************************************************
*
* Translation of errors reported via the ms_error structure into
* Ruby exceptions. Generally copied from Python MapScript by Jim Klassen.
* Follows original code by Chris Chamberlin <cdc@aracnet.com> as updated
* updated by Sean Gillies <sgillies@frii.com>.
* Uses rb_raise, %exception and $action for SWIG 1.3, do the most
* obvious mapping of MapServer errors to Ruby exceptions and map all
* others to a new 'MapServerError' exception which can be caught like
* this:
*
* require 'mapscript'
* empty_map = Mapscript.MapObj.new('')
* begin:
* img = empty_map.draw()
* rescue Mapscript::MapServerError => msg
* print "Caught MapServerError:", msg.to_s
* end
*
*************************************************************************/
%{
VALUE MSExc_MapServerError;
VALUE MSExc_MapServerChildError;
%}
/* Module initialization: call msSetup() and register msCleanup() */
%init %{
/* Copied from pymodule.i to fix #3619 */
if (msSetup() != MS_SUCCESS)
{
msSetError(MS_MISCERR, "Failed to set up threads and font cache",
"msSetup()");
}
/* Is there a place to hook to call msCleanup()? */
VALUE exceptionClass = rb_eval_string("Exception");
VALUE mapscriptModule = rb_eval_string("Mapscript");
MSExc_MapServerError = rb_define_class_under(mapscriptModule, "MapserverError", exceptionClass);
MSExc_MapServerChildError = rb_define_class_under(mapscriptModule, "MapserverChildErrorError", exceptionClass);
%}
%{
static void _raise_ms_exception( void );
static void _raise_ms_exception() {
int errcode;
errorObj *ms_error;
char *errmsg;
ms_error = msGetErrorObj();
errcode = ms_error->code;
errmsg = msGetErrorString("\n");
switch (errcode) {
case MS_IOERR:
rb_raise(rb_eIOError, errmsg);
break;
case MS_MEMERR:
rb_raise(rb_eNoMemError, errmsg);
break;
case MS_TYPEERR:
rb_raise(rb_eTypeError, errmsg);
break;
case MS_EOFERR:
rb_raise(rb_eEOFError, errmsg);
break;
case MS_CHILDERR:
rb_raise(MSExc_MapServerChildError, errmsg);
break;
default:
rb_raise(MSExc_MapServerError, errmsg);
break;
}
free(errmsg);
}
%}
%exception {
msResetErrorList();
$action
{
errorObj *ms_error = msGetErrorObj();
switch(ms_error->code) {
case MS_NOERR:
break;
case MS_NOTFOUND:
msResetErrorList();
break;
case -1:
break;
case MS_IOERR:
if (strncmp(ms_error->routine, "msSearchDiskTree()", 20) != 0) {
_raise_ms_exception();
msResetErrorList();
return NULL;
}
default:
_raise_ms_exception();
msResetErrorList();
return NULL;
}
}
}
|
