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perl-XML-LibXML / typemap

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TYPEMAP
const char *                T_PV
xmlParserCtxtPtr            O_PARSER_OBJECT
xmlRelaxNGPtr               O_OBJECT
xmlSchemaPtr                O_OBJECT
xmlNodeSetPtr               O_OBJECT
perlxmlParserObjectPtr      O_OBJECT
xmlDocPtr                   O_DOC_OBJECT
xmlNodePtr                  O_NODE_OBJECT

INPUT
O_OBJECT
    if( sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG) )
            $var = ($type)SvIV((SV*)SvRV( $arg ));
    else{
            warn( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
            XSRETURN_UNDEF;
    }

O_DOC_OBJECT
    if( sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG) ) {
            $var = ($type)PmmSvNode($arg);
            if ( $var == NULL ) {
               croak( \"${Package}::$func_name() -- $var contains no data\" );
               XSRETURN_UNDEF;
            }
    }
    else{
            croak( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
            XSRETURN_UNDEF;
    }

O_NODE_OBJECT
    if( sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG) ) {
            $var = ($type)PmmSvNode($arg);
            if ( $var == NULL ) {
               croak( \"${Package}::$func_name() -- $var contains no data\" );
               XSRETURN_UNDEF;
            }
    }
    else {
            croak( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
            XSRETURN_UNDEF;
    }

O_PARSER_OBJECT
    if( sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG) ) {
            $var = PmmSvContext($arg);
            if ( $var == NULL ) {
               croak( \"${Package}::$func_name() -- $var contains no parse context\" );
               XSRETURN_UNDEF;
            }
    }
    else {
            croak( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
            XSRETURN_UNDEF;
    }


OUTPUT

# The Perl object is blessed into 'CLASS', which should be a
# char* having the name of the package for the blessing.
O_OBJECT
        sv_setref_pv( $arg, (char *)CLASS, (void*)$var );


O_PARSER_OBJECT
        $arg = PmmContextSv( $var );