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/*
** mruby/data.h - Data class
**
** See Copyright Notice in mruby.h
*/
#ifndef MRUBY_DATA_H
#define MRUBY_DATA_H
#include "common.h"
/**
* Custom C wrapped data.
*
* Defining Ruby wrappers around native objects.
*/
MRB_BEGIN_DECL
/**
* Custom data type description.
*/
typedef struct mrb_data_type {
/** data type name */
const char *struct_name;
/** data type release function pointer */
void (*dfree)(mrb_state *mrb, void*);
} mrb_data_type;
struct RData {
MRB_OBJECT_HEADER;
struct iv_tbl *iv;
const mrb_data_type *type;
void *data;
};
MRB_API struct RData *mrb_data_object_alloc(mrb_state *mrb, struct RClass* klass, void *datap, const mrb_data_type *type);
#define Data_Wrap_Struct(mrb,klass,type,ptr)\
mrb_data_object_alloc(mrb,klass,ptr,type)
#define Data_Make_Struct(mrb,klass,strct,type,sval,data_obj) do { \
(data_obj) = Data_Wrap_Struct(mrb,klass,type,NULL);\
(sval) = mrb_malloc(mrb, sizeof(strct)); \
{ static const strct zero = { 0 }; *(sval) = zero; };\
(data_obj)->data = (sval);\
} while (0)
#define RDATA(obj) ((struct RData *)(mrb_ptr(obj)))
#define DATA_PTR(d) (RDATA(d)->data)
#define DATA_TYPE(d) (RDATA(d)->type)
MRB_API void mrb_data_check_type(mrb_state *mrb, mrb_value, const mrb_data_type*);
MRB_API void *mrb_data_get_ptr(mrb_state *mrb, mrb_value, const mrb_data_type*);
#define DATA_GET_PTR(mrb,obj,dtype,type) (type*)mrb_data_get_ptr(mrb,obj,dtype)
MRB_API void *mrb_data_check_get_ptr(mrb_state *mrb, mrb_value, const mrb_data_type*);
#define DATA_CHECK_GET_PTR(mrb,obj,dtype,type) (type*)mrb_data_check_get_ptr(mrb,obj,dtype)
/* obsolete functions and macros */
#define mrb_data_check_and_get(mrb,obj,dtype) mrb_data_get_ptr(mrb,obj,dtype)
#define mrb_get_datatype(mrb,val,type) mrb_data_get_ptr(mrb, val, type)
#define mrb_check_datatype(mrb,val,type) mrb_data_get_ptr(mrb, val, type)
#define Data_Get_Struct(mrb,obj,type,sval) do {\
*(void**)&sval = mrb_data_get_ptr(mrb, obj, type); \
} while (0)
static inline void
mrb_data_init(mrb_value v, void *ptr, const mrb_data_type *type)
{
mrb_assert(mrb_type(v) == MRB_TT_DATA);
DATA_PTR(v) = ptr;
DATA_TYPE(v) = type;
}
MRB_END_DECL
#endif /* MRUBY_DATA_H */