lvm.h revision 1.8 
1/*	$NetBSD: lvm.h,v 1.8 2017/04/26 12:49:34 mbalmer Exp $	*/
2
3/*
4** Id: lvm.h,v 2.41 2016/12/22 13:08:50 roberto Exp
5** Lua virtual machine
6** See Copyright Notice in lua.h
7*/
8
9#ifndef lvm_h
10#define lvm_h
11
12
13#include "ldo.h"
14#include "lobject.h"
15#include "ltm.h"
16
17
18#if !defined(LUA_NOCVTN2S)
19#define cvt2str(o)	ttisnumber(o)
20#else
21#define cvt2str(o)	0	/* no conversion from numbers to strings */
22#endif
23
24
25#if !defined(LUA_NOCVTS2N)
26#define cvt2num(o)	ttisstring(o)
27#else
28#define cvt2num(o)	0	/* no conversion from strings to numbers */
29#endif
30
31
32/*
33** You can define LUA_FLOORN2I if you want to convert floats to integers
34** by flooring them (instead of raising an error if they are not
35** integral values)
36*/
37#if !defined(LUA_FLOORN2I)
38#define LUA_FLOORN2I		0
39#endif
40
41
42#ifndef _KERNEL
43#define tonumber(o,n) \
44	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
45#else /* _KERNEL */
46#define tonumber       tointeger
47#endif /* _KERNEL */
48
49#define tointeger(o,i) \
50    (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
51
52#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
53
54#define luaV_rawequalobj(t1,t2)		luaV_equalobj(NULL,t1,t2)
55
56
57/*
58** fast track for 'gettable': if 't' is a table and 't[k]' is not nil,
59** return 1 with 'slot' pointing to 't[k]' (final result).  Otherwise,
60** return 0 (meaning it will have to check metamethod) with 'slot'
61** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
62** 'f' is the raw get function to use.
63*/
64#define luaV_fastget(L,t,k,slot,f) \
65  (!ttistable(t)  \
66   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
67   : (slot = f(hvalue(t), k),  /* else, do raw access */  \
68      !ttisnil(slot)))  /* result not nil? */
69
70/*
71** standard implementation for 'gettable'
72*/
73#define luaV_gettable(L,t,k,v) { const TValue *slot; \
74  if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
75  else luaV_finishget(L,t,k,v,slot); }
76
77
78/*
79** Fast track for set table. If 't' is a table and 't[k]' is not nil,
80** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
81** return false with 'slot' equal to NULL (if 't' is not a table) or
82** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
83** returns true, there is no need to 'invalidateTMcache', because the
84** call is not creating a new entry.
85*/
86#define luaV_fastset(L,t,k,slot,f,v) \
87  (!ttistable(t) \
88   ? (slot = NULL, 0) \
89   : (slot = f(hvalue(t), k), \
90     ttisnil(slot) ? 0 \
91     : (luaC_barrierback(L, hvalue(t), v), \
92        setobj2t(L, cast(TValue *,slot), v), \
93        1)))
94
95
96#define luaV_settable(L,t,k,v) { const TValue *slot; \
97  if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
98    luaV_finishset(L,t,k,v,slot); }
99
100
101
102LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
103LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
104LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
105LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
106LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
107LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
108                               StkId val, const TValue *slot);
109LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
110                               StkId val, const TValue *slot);
111LUAI_FUNC void luaV_finishOp (lua_State *L);
112LUAI_FUNC void luaV_execute (lua_State *L);
113LUAI_FUNC void luaV_concat (lua_State *L, int total);
114LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
115LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
116LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
117LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
118
119#endif
120