/** ** @file mruby/boxing_word.h - word boxing mrb_value definition ** ** See Copyright Notice in mruby.h */ #ifndef MRUBY_BOXING_WORD_H #define MRUBY_BOXING_WORD_H #if defined(MRB_32BIT) && !defined(MRB_USE_FLOAT32) && !defined(MRB_WORDBOX_NO_FLOAT_TRUNCATE) # define MRB_WORDBOX_NO_FLOAT_TRUNCATE #endif #if !defined(MRB_NO_FLOAT) && defined(MRB_WORDBOX_NO_FLOAT_TRUNCATE) struct RFloat { MRB_OBJECT_HEADER; mrb_float f; }; #endif struct RInteger { MRB_OBJECT_HEADER; mrb_int i; }; enum mrb_special_consts { MRB_Qnil = 0, MRB_Qfalse = 4, MRB_Qtrue = 12, MRB_Qundef = 20, }; #if defined(MRB_64BIT) && defined(MRB_INT32) #define MRB_FIXNUM_SHIFT 0 #else #define MRB_FIXNUM_SHIFT WORDBOX_FIXNUM_SHIFT #endif #define MRB_SYMBOL_SHIFT WORDBOX_SYMBOL_SHIFT #if defined(MRB_64BIT) && defined(MRB_INT64) # define MRB_FIXNUM_MIN (INT64_MIN>>MRB_FIXNUM_SHIFT) # define MRB_FIXNUM_MAX (INT64_MAX>>MRB_FIXNUM_SHIFT) #else # define MRB_FIXNUM_MIN (INT32_MIN>>MRB_FIXNUM_SHIFT) # define MRB_FIXNUM_MAX (INT32_MAX>>MRB_FIXNUM_SHIFT) #endif #define WORDBOX_FIXNUM_BIT_POS 1 #define WORDBOX_FIXNUM_SHIFT WORDBOX_FIXNUM_BIT_POS #define WORDBOX_FIXNUM_FLAG (1 << (WORDBOX_FIXNUM_BIT_POS - 1)) #define WORDBOX_FIXNUM_MASK ((1 << WORDBOX_FIXNUM_BIT_POS) - 1) #if defined(MRB_WORDBOX_NO_FLOAT_TRUNCATE) /* floats are allocated in heaps */ #define WORDBOX_SYMBOL_BIT_POS 2 #define WORDBOX_SYMBOL_SHIFT WORDBOX_SYMBOL_BIT_POS #define WORDBOX_SYMBOL_FLAG (1 << (WORDBOX_SYMBOL_BIT_POS - 1)) #define WORDBOX_SYMBOL_MASK ((1 << WORDBOX_SYMBOL_BIT_POS) - 1) #else #define WORDBOX_FLOAT_FLAG 2 #define WORDBOX_FLOAT_MASK 3 #if defined(MRB_64BIT) #define WORDBOX_SYMBOL_SHIFT 32 #else /* MRB_32BIT */ #define WORDBOX_SYMBOL_SHIFT 5 #endif #define WORDBOX_SYMBOL_FLAG 0x1c #define WORDBOX_SYMBOL_MASK 0x1f #endif #define WORDBOX_IMMEDIATE_MASK 0x07 #define WORDBOX_SET_SHIFT_VALUE(o,n,v) \ ((o).w = (((uintptr_t)(v)) << WORDBOX_##n##_SHIFT) | WORDBOX_##n##_FLAG) #define WORDBOX_SHIFT_VALUE_P(o,n) \ (((o).w & WORDBOX_##n##_MASK) == WORDBOX_##n##_FLAG) #define WORDBOX_OBJ_TYPE_P(o,n) \ (!mrb_immediate_p(o) && mrb_val_union(o).bp->tt == MRB_TT_##n) /* * mrb_value representation: * * 64bit word with inline float: * nil : ...0000 0000 (all bits are 0) * false : ...0000 0100 (mrb_fixnum(v) != 0) * true : ...0000 1100 * undef : ...0001 0100 * symbol: ...0001 1100 (use only upper 32-bit as symbol value with MRB_64BIT) * fixnum: ...IIII III1 * float : ...FFFF FF10 (51 bit significands; require MRB_64BIT) * object: ...PPPP P000 * * 32bit word with inline float: * nil : ...0000 0000 (all bits are 0) * false : ...0000 0100 (mrb_fixnum(v) != 0) * true : ...0000 1100 * undef : ...0001 0100 * symbol: ...SSS1 0100 (symbol occupies 20bits) * fixnum: ...IIII III1 * float : ...FFFF FF10 (22 bit significands; require MRB_64BIT) * object: ...PPPP P000 * * and word boxing without inline float (MRB_WORDBOX_NO_FLOAT_TRUNCATE): * nil : ...0000 0000 (all bits are 0) * false : ...0000 0100 (mrb_fixnum(v) != 0) * true : ...0000 1100 * undef : ...0001 0100 * fixnum: ...IIII III1 * symbol: ...SSSS SS10 * object: ...PPPP P000 (any bits are 1) */ typedef struct mrb_value { uintptr_t w; } mrb_value; union mrb_value_ { void *p; struct RBasic *bp; #ifndef MRB_NO_FLOAT #ifndef MRB_WORDBOX_NO_FLOAT_TRUNCATE mrb_float f; #else struct RFloat *fp; #endif #endif struct RInteger *ip; struct RCptr *vp; uintptr_t w; mrb_value value; }; mrb_static_assert(sizeof(mrb_value) == sizeof(union mrb_value_)); static inline union mrb_value_ mrb_val_union(mrb_value v) { union mrb_value_ x; x.value = v; return x; } MRB_API mrb_value mrb_word_boxing_cptr_value(struct mrb_state*, void*); #ifndef MRB_NO_FLOAT MRB_API mrb_value mrb_word_boxing_float_value(struct mrb_state*, mrb_float); #endif MRB_API mrb_value mrb_boxing_int_value(struct mrb_state*, mrb_int); #define mrb_immediate_p(o) ((o).w & WORDBOX_IMMEDIATE_MASK || (o).w == MRB_Qnil) #define mrb_ptr(o) mrb_val_union(o).p #define mrb_cptr(o) mrb_val_union(o).vp->p #ifndef MRB_NO_FLOAT #ifndef MRB_WORDBOX_NO_FLOAT_TRUNCATE MRB_API mrb_float mrb_word_boxing_value_float(mrb_value v); #define mrb_float(o) mrb_word_boxing_value_float(o) #else #define mrb_float(o) mrb_val_union(o).fp->f #endif #endif #define mrb_fixnum(o) (mrb_int)(((intptr_t)(o).w) >> WORDBOX_FIXNUM_SHIFT) MRB_INLINE mrb_int mrb_integer_func(mrb_value o) { if (mrb_immediate_p(o)) return mrb_fixnum(o); return mrb_val_union(o).ip->i; } #define mrb_integer(o) mrb_integer_func(o) #define mrb_symbol(o) (mrb_sym)(((o).w) >> WORDBOX_SYMBOL_SHIFT) #define mrb_bool(o) (((o).w & ~(uintptr_t)MRB_Qfalse) != 0) #define mrb_fixnum_p(o) WORDBOX_SHIFT_VALUE_P(o, FIXNUM) #define mrb_integer_p(o) (WORDBOX_SHIFT_VALUE_P(o, FIXNUM)||WORDBOX_OBJ_TYPE_P(o, INTEGER)) #define mrb_symbol_p(o) WORDBOX_SHIFT_VALUE_P(o, SYMBOL) #define mrb_undef_p(o) ((o).w == MRB_Qundef) #define mrb_nil_p(o) ((o).w == MRB_Qnil) #define mrb_false_p(o) ((o).w == MRB_Qfalse) #define mrb_true_p(o) ((o).w == MRB_Qtrue) #ifndef MRB_NO_FLOAT #ifndef MRB_WORDBOX_NO_FLOAT_TRUNCATE #define mrb_float_p(o) WORDBOX_SHIFT_VALUE_P(o, FLOAT) #else #define mrb_float_p(o) WORDBOX_OBJ_TYPE_P(o, FLOAT) #endif #else #define mrb_float_p(o) FALSE #endif #define mrb_array_p(o) WORDBOX_OBJ_TYPE_P(o, ARRAY) #define mrb_string_p(o) WORDBOX_OBJ_TYPE_P(o, STRING) #define mrb_hash_p(o) WORDBOX_OBJ_TYPE_P(o, HASH) #define mrb_cptr_p(o) WORDBOX_OBJ_TYPE_P(o, CPTR) #define mrb_exception_p(o) WORDBOX_OBJ_TYPE_P(o, EXCEPTION) #define mrb_free_p(o) WORDBOX_OBJ_TYPE_P(o, FREE) #define mrb_object_p(o) WORDBOX_OBJ_TYPE_P(o, OBJECT) #define mrb_class_p(o) WORDBOX_OBJ_TYPE_P(o, CLASS) #define mrb_module_p(o) WORDBOX_OBJ_TYPE_P(o, MODULE) #define mrb_iclass_p(o) WORDBOX_OBJ_TYPE_P(o, ICLASS) #define mrb_sclass_p(o) WORDBOX_OBJ_TYPE_P(o, SCLASS) #define mrb_proc_p(o) WORDBOX_OBJ_TYPE_P(o, PROC) #define mrb_range_p(o) WORDBOX_OBJ_TYPE_P(o, RANGE) #define mrb_env_p(o) WORDBOX_OBJ_TYPE_P(o, ENV) #define mrb_data_p(o) WORDBOX_OBJ_TYPE_P(o, DATA) #define mrb_fiber_p(o) WORDBOX_OBJ_TYPE_P(o, FIBER) #define mrb_istruct_p(o) WORDBOX_OBJ_TYPE_P(o, ISTRUCT) #define mrb_break_p(o) WORDBOX_OBJ_TYPE_P(o, BREAK) #ifndef MRB_NO_FLOAT #define SET_FLOAT_VALUE(mrb,r,v) ((r) = mrb_word_boxing_float_value(mrb, v)) #endif #define SET_CPTR_VALUE(mrb,r,v) ((r) = mrb_word_boxing_cptr_value(mrb, v)) #define SET_UNDEF_VALUE(r) ((r).w = MRB_Qundef) #define SET_NIL_VALUE(r) ((r).w = MRB_Qnil) #define SET_FALSE_VALUE(r) ((r).w = MRB_Qfalse) #define SET_TRUE_VALUE(r) ((r).w = MRB_Qtrue) #define SET_BOOL_VALUE(r,b) ((b) ? SET_TRUE_VALUE(r) : SET_FALSE_VALUE(r)) #define SET_INT_VALUE(mrb,r,n) ((r) = mrb_boxing_int_value(mrb, n)) #define SET_FIXNUM_VALUE(r,n) WORDBOX_SET_SHIFT_VALUE(r, FIXNUM, n) #define SET_SYM_VALUE(r,n) WORDBOX_SET_SHIFT_VALUE(r, SYMBOL, n) #define SET_OBJ_VALUE(r,v) ((r).w = (uintptr_t)(v)) MRB_INLINE enum mrb_vtype mrb_type(mrb_value o) { return !mrb_bool(o) ? MRB_TT_FALSE : mrb_true_p(o) ? MRB_TT_TRUE : mrb_fixnum_p(o) ? MRB_TT_INTEGER : mrb_symbol_p(o) ? MRB_TT_SYMBOL : mrb_undef_p(o) ? MRB_TT_UNDEF : mrb_float_p(o) ? MRB_TT_FLOAT : mrb_val_union(o).bp->tt; } #endif /* MRUBY_BOXING_WORD_H */