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https://github.com/mruby/mruby
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147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/*
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** mruby/boxing_word.h - word boxing mrb_value definition
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**
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** See Copyright Notice in mruby.h
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*/
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#ifndef MRUBY_BOXING_WORD_H
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#define MRUBY_BOXING_WORD_H
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#if defined(MRB_INT16)
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# error MRB_INT16 is too small for MRB_WORD_BOXING.
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#endif
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#if defined(MRB_INT64) && !defined(MRB_64BIT)
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#error MRB_INT64 cannot be used with MRB_WORD_BOXING in 32-bit mode.
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#endif
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#ifndef MRB_WITHOUT_FLOAT
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struct RFloat {
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MRB_OBJECT_HEADER;
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mrb_float f;
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};
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#endif
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struct RCptr {
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MRB_OBJECT_HEADER;
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void *p;
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};
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#define MRB_FIXNUM_SHIFT 1
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#ifdef MRB_WITHOUT_FLOAT
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#define MRB_TT_HAS_BASIC MRB_TT_CPTR
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#else
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#define MRB_TT_HAS_BASIC MRB_TT_FLOAT
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#endif
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enum mrb_special_consts {
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MRB_Qnil = 0,
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MRB_Qfalse = 2,
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MRB_Qtrue = 4,
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MRB_Qundef = 6,
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};
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#define MRB_FIXNUM_FLAG 0x01
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#define MRB_SYMBOL_FLAG 0x0e
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#define MRB_SPECIAL_SHIFT 8
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#if defined(MRB_64BIT)
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#define MRB_SYMBOL_BITSIZE (sizeof(mrb_sym) * CHAR_BIT)
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#define MRB_SYMBOL_MAX UINT32_MAX
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#else
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#define MRB_SYMBOL_BITSIZE (sizeof(mrb_sym) * CHAR_BIT - MRB_SPECIAL_SHIFT)
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#define MRB_SYMBOL_MAX (UINT32_MAX >> MRB_SPECIAL_SHIFT)
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#endif
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typedef union mrb_value {
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union {
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void *p;
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struct {
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unsigned int i_flag : MRB_FIXNUM_SHIFT;
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mrb_int i : (MRB_INT_BIT - MRB_FIXNUM_SHIFT);
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};
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struct {
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unsigned int sym_flag : MRB_SPECIAL_SHIFT;
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mrb_sym sym : MRB_SYMBOL_BITSIZE;
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};
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struct RBasic *bp;
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#ifndef MRB_WITHOUT_FLOAT
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struct RFloat *fp;
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#endif
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struct RCptr *vp;
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} value;
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unsigned long w;
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} mrb_value;
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MRB_API mrb_value mrb_word_boxing_cptr_value(struct mrb_state*, void*);
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#ifndef MRB_WITHOUT_FLOAT
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MRB_API mrb_value mrb_word_boxing_float_value(struct mrb_state*, mrb_float);
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MRB_API mrb_value mrb_word_boxing_float_pool(struct mrb_state*, mrb_float);
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#endif
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#ifndef MRB_WITHOUT_FLOAT
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#define mrb_float_pool(mrb,f) mrb_word_boxing_float_pool(mrb,f)
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#endif
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#define mrb_ptr(o) (o).value.p
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#define mrb_cptr(o) (o).value.vp->p
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#ifndef MRB_WITHOUT_FLOAT
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#define mrb_float(o) (o).value.fp->f
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#endif
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#define mrb_fixnum(o) ((mrb_int)(o).value.i)
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#define mrb_symbol(o) (o).value.sym
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static inline enum mrb_vtype
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mrb_type(mrb_value o)
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{
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switch (o.w) {
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case MRB_Qfalse:
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case MRB_Qnil:
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return MRB_TT_FALSE;
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case MRB_Qtrue:
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return MRB_TT_TRUE;
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case MRB_Qundef:
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return MRB_TT_UNDEF;
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}
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if (o.value.i_flag == MRB_FIXNUM_FLAG) {
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return MRB_TT_FIXNUM;
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}
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if (o.value.sym_flag == MRB_SYMBOL_FLAG) {
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return MRB_TT_SYMBOL;
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}
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return o.value.bp->tt;
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}
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#define mrb_bool(o) ((o).w != MRB_Qnil && (o).w != MRB_Qfalse)
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#define mrb_fixnum_p(o) ((o).value.i_flag == MRB_FIXNUM_FLAG)
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#define mrb_undef_p(o) ((o).w == MRB_Qundef)
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#define mrb_nil_p(o) ((o).w == MRB_Qnil)
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#define mrb_false_p(o) ((o).w == MRB_Qfalse)
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#define mrb_true_p(o) ((o).w == MRB_Qtrue)
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#define BOXWORD_SET_VALUE(o, ttt, attr, v) do { \
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switch (ttt) {\
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case MRB_TT_FALSE: (o).w = (v) ? MRB_Qfalse : MRB_Qnil; break;\
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case MRB_TT_TRUE: (o).w = MRB_Qtrue; break;\
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case MRB_TT_UNDEF: (o).w = MRB_Qundef; break;\
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case MRB_TT_FIXNUM: (o).w = 0;(o).value.i_flag = MRB_FIXNUM_FLAG; (o).attr = (v); break;\
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case MRB_TT_SYMBOL: (o).w = 0;(o).value.sym_flag = MRB_SYMBOL_FLAG; (o).attr = (v); break;\
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default: (o).w = 0; (o).attr = (v); if ((o).value.bp) (o).value.bp->tt = ttt; break;\
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}\
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} while (0)
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#ifndef MRB_WITHOUT_FLOAT
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#define SET_FLOAT_VALUE(mrb,r,v) ((r) = mrb_word_boxing_float_value(mrb, v))
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#endif
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#define SET_CPTR_VALUE(mrb,r,v) ((r) = mrb_word_boxing_cptr_value(mrb, v))
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#define SET_NIL_VALUE(r) BOXWORD_SET_VALUE(r, MRB_TT_FALSE, value.i, 0)
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#define SET_FALSE_VALUE(r) BOXWORD_SET_VALUE(r, MRB_TT_FALSE, value.i, 1)
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#define SET_TRUE_VALUE(r) BOXWORD_SET_VALUE(r, MRB_TT_TRUE, value.i, 1)
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#define SET_BOOL_VALUE(r,b) BOXWORD_SET_VALUE(r, (b) ? MRB_TT_TRUE : MRB_TT_FALSE, value.i, 1)
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#define SET_INT_VALUE(r,n) BOXWORD_SET_VALUE(r, MRB_TT_FIXNUM, value.i, (n))
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#define SET_SYM_VALUE(r,v) BOXWORD_SET_VALUE(r, MRB_TT_SYMBOL, value.sym, (v))
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#define SET_OBJ_VALUE(r,v) BOXWORD_SET_VALUE(r, (((struct RObject*)(v))->tt), value.p, (v))
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#define SET_UNDEF_VALUE(r) BOXWORD_SET_VALUE(r, MRB_TT_UNDEF, value.i, 0)
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#endif /* MRUBY_BOXING_WORD_H */
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