conversions.c
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#include <fiddle.h>
ffi_type *
int_to_ffi_type(int type)
{
int signed_p = 1;
if (type < 0) {
type = -1 * type;
signed_p = 0;
}
#define rb_ffi_type_of(t) (signed_p ? &ffi_type_s##t : &ffi_type_u##t)
switch (type) {
case TYPE_VOID:
return &ffi_type_void;
case TYPE_VOIDP:
return &ffi_type_pointer;
case TYPE_CHAR:
return rb_ffi_type_of(char);
case TYPE_SHORT:
return rb_ffi_type_of(short);
case TYPE_INT:
return rb_ffi_type_of(int);
case TYPE_LONG:
return rb_ffi_type_of(long);
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
return rb_ffi_type_of(long_long);
#endif
case TYPE_FLOAT:
return &ffi_type_float;
case TYPE_DOUBLE:
return &ffi_type_double;
default:
rb_raise(rb_eRuntimeError, "unknown type %d", type);
}
return &ffi_type_pointer;
}
void
value_to_generic(int type, VALUE src, fiddle_generic * dst)
{
switch (type) {
case TYPE_VOID:
break;
case TYPE_VOIDP:
dst->pointer = NUM2PTR(rb_Integer(src));
break;
case TYPE_CHAR:
dst->schar = (signed char)NUM2INT(src);
break;
case -TYPE_CHAR:
dst->uchar = (unsigned char)NUM2UINT(src);
break;
case TYPE_SHORT:
dst->sshort = (unsigned short)NUM2INT(src);
break;
case -TYPE_SHORT:
dst->sshort = (signed short)NUM2UINT(src);
break;
case TYPE_INT:
dst->sint = NUM2INT(src);
break;
case -TYPE_INT:
dst->uint = NUM2UINT(src);
break;
case TYPE_LONG:
dst->slong = NUM2LONG(src);
break;
case -TYPE_LONG:
dst->ulong = NUM2ULONG(src);
break;
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
dst->slong_long = NUM2LL(src);
break;
case -TYPE_LONG_LONG:
dst->ulong_long = NUM2ULL(src);
break;
#endif
case TYPE_FLOAT:
dst->ffloat = (float)NUM2DBL(src);
break;
case TYPE_DOUBLE:
dst->ddouble = NUM2DBL(src);
break;
default:
rb_raise(rb_eRuntimeError, "unknown type %d", type);
}
}
VALUE
generic_to_value(VALUE rettype, fiddle_generic retval)
{
int type = NUM2INT(rettype);
VALUE cPointer;
cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
switch (type) {
case TYPE_VOID:
return Qnil;
case TYPE_VOIDP:
return rb_funcall(cPointer, rb_intern("[]"), 1,
PTR2NUM((void *)retval.pointer));
case TYPE_CHAR:
return INT2NUM((signed char)retval.fffi_sarg);
case -TYPE_CHAR:
return INT2NUM((unsigned char)retval.fffi_arg);
case TYPE_SHORT:
return INT2NUM((signed short)retval.fffi_sarg);
case -TYPE_SHORT:
return INT2NUM((unsigned short)retval.fffi_arg);
case TYPE_INT:
return INT2NUM((signed int)retval.fffi_sarg);
case -TYPE_INT:
return UINT2NUM((unsigned int)retval.fffi_arg);
case TYPE_LONG:
return LONG2NUM(retval.slong);
case -TYPE_LONG:
return ULONG2NUM(retval.ulong);
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
return LL2NUM(retval.slong_long);
case -TYPE_LONG_LONG:
return ULL2NUM(retval.ulong_long);
#endif
case TYPE_FLOAT:
return rb_float_new(retval.ffloat);
case TYPE_DOUBLE:
return rb_float_new(retval.ddouble);
default:
rb_raise(rb_eRuntimeError, "unknown type %d", type);
}
}
/* vim: set noet sw=4 sts=4 */