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/* -----------------------------------------------------------------------------
* reference.i
*
* Accept Perl references as pointers
* ----------------------------------------------------------------------------- */
/*
The following methods make Perl references work like simple C
pointers. References can only be used for simple input/output
values, not C arrays however. It should also be noted that
REFERENCES are specific to Perl and not supported in other
scripting languages at this time.
int *REFERENCE
short *REFERENCE
long *REFERENCE
unsigned int *REFERENCE
unsigned short *REFERENCE
unsigned long *REFERENCE
unsigned char *REFERENCE
float *REFERENCE
double *REFERENCE
For example, suppose you were trying to wrap the following function :
void neg(double *x) {
*x = -(*x);
}
You could wrap it with SWIG as follows :
%include reference.i
void neg(double *REFERENCE);
or you can use the %apply directive :
%include reference.i
%apply double *REFERENCE { double *x };
void neg(double *x);
Unlike the INOUT mapping described in typemaps.i, this approach directly
modifies the value of a Perl reference. Thus, you could use it
as follows :
$x = 3;
neg(\$x);
print "$x\n"; # Should print out -3.
*/
%typemap(in) double *REFERENCE (double dvalue), double &REFERENCE(double dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if ((!SvNOK(tempsv)) && (!SvIOK(tempsv))) {
printf("Received %d\n", SvTYPE(tempsv));
SWIG_croak("Expected a double reference.");
}
dvalue = SvNV(tempsv);
$1 = &dvalue;
}
%typemap(in) float *REFERENCE (float dvalue), float &REFERENCE(float dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if ((!SvNOK(tempsv)) && (!SvIOK(tempsv))) {
SWIG_croak("expected a double reference");
}
dvalue = (float) SvNV(tempsv);
$1 = &dvalue;
}
%typemap(in) int *REFERENCE (int dvalue), int &REFERENCE (int dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = SvIV(tempsv);
$1 = &dvalue;
}
%typemap(in) short *REFERENCE (short dvalue), short &REFERENCE(short dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (short) SvIV(tempsv);
$1 = &dvalue;
}
%typemap(in) long *REFERENCE (long dvalue), long &REFERENCE(long dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (long) SvIV(tempsv);
$1 = &dvalue;
}
%typemap(in) unsigned int *REFERENCE (unsigned int dvalue), unsigned int &REFERENCE(unsigned int dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (unsigned int) SvUV(tempsv);
$1 = &dvalue;
}
%typemap(in) unsigned short *REFERENCE (unsigned short dvalue), unsigned short &REFERENCE(unsigned short dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (unsigned short) SvUV(tempsv);
$1 = &dvalue;
}
%typemap(in) unsigned long *REFERENCE (unsigned long dvalue), unsigned long &REFERENCE(unsigned long dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (unsigned long) SvUV(tempsv);
$1 = &dvalue;
}
%typemap(in) unsigned char *REFERENCE (unsigned char dvalue), unsigned char &REFERENCE(unsigned char dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (unsigned char) SvUV(tempsv);
$1 = &dvalue;
}
%typemap(in) signed char *REFERENCE (signed char dvalue), signed char &REFERENCE(signed char dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = (signed char) SvIV(tempsv);
$1 = &dvalue;
}
%typemap(in) bool *REFERENCE (bool dvalue), bool &REFERENCE(bool dvalue)
{
SV *tempsv;
if (!SvROK($input)) {
SWIG_croak("expected a reference");
}
tempsv = SvRV($input);
if (!SvIOK(tempsv)) {
SWIG_croak("expected an integer reference");
}
dvalue = SvIV(tempsv) ? true : false;
$1 = &dvalue;
}
%typemap(typecheck) int *REFERENCE, int &REFERENCE,
short *REFERENCE, short &REFERENCE,
long *REFERENCE, long &REFERENCE,
signed char *REFERENCE, signed char &REFERENCE,
bool *REFERENCE, bool &REFERENCE
{
$1 = SvROK($input) && SvIOK(SvRV($input));
}
%typemap(typecheck) double *REFERENCE, double &REFERENCE,
float *REFERENCE, float &REFERENCE
{
$1 = SvROK($input);
if($1) {
SV *tmpsv = SvRV($input);
$1 = SvNOK(tmpsv) || SvIOK(tmpsv);
}
}
%typemap(typecheck) unsigned int *REFERENCE, unsigned int &REFERENCE,
unsigned short *REFERENCE, unsigned short &REFERENCE,
unsigned long *REFERENCE, unsigned long &REFERENCE,
unsigned char *REFERENCE, unsigned char &REFERENCE
{
$1 = SvROK($input);
if($1) {
SV *tmpsv = SvRV($input);
$1 = SvUOK(tmpsv) || SvIOK(tmpsv);
}
}
%typemap(argout) double *REFERENCE, double &REFERENCE,
float *REFERENCE, float &REFERENCE
{
SV *tempsv;
tempsv = SvRV($arg);
if (!$1) SWIG_croak("expected a reference");
sv_setnv(tempsv, (double) *$1);
}
%typemap(argout) int *REFERENCE, int &REFERENCE,
short *REFERENCE, short &REFERENCE,
long *REFERENCE, long &REFERENCE,
signed char *REFERENCE, signed char &REFERENCE,
bool *REFERENCE, bool &REFERENCE
{
SV *tempsv;
tempsv = SvRV($input);
if (!$1) SWIG_croak("expected a reference");
sv_setiv(tempsv, (IV) *$1);
}
%typemap(argout) unsigned int *REFERENCE, unsigned int &REFERENCE,
unsigned short *REFERENCE, unsigned short &REFERENCE,
unsigned long *REFERENCE, unsigned long &REFERENCE,
unsigned char *REFERENCE, unsigned char &REFERENCE
{
SV *tempsv;
tempsv = SvRV($input);
if (!$1) SWIG_croak("expected a reference");
sv_setuv(tempsv, (UV) *$1);
}
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