1/*
2** $Id: lvm.h,v 2.41.1.1 2017/04/19 17:20:42 roberto Exp $
3** Lua virtual machine
4** See Copyright Notice in lua.h
5*/
6
7#ifndef lvm_h
8#define lvm_h
9
10
11#include "ldo.h"
12#include "lobject.h"
13#include "ltm.h"
14
15
16#if !defined(LUA_NOCVTN2S)
17#define cvt2str(o)	ttisnumber(o)
18#else
19#define cvt2str(o)	0	/* no conversion from numbers to strings */
20#endif
21
22
23#if !defined(LUA_NOCVTS2N)
24#define cvt2num(o)	ttisstring(o)
25#else
26#define cvt2num(o)	0	/* no conversion from strings to numbers */
27#endif
28
29
30/*
31** You can define LUA_FLOORN2I if you want to convert floats to integers
32** by flooring them (instead of raising an error if they are not
33** integral values)
34*/
35#if !defined(LUA_FLOORN2I)
36#define LUA_FLOORN2I		0
37#endif
38
39
40#define tonumber(o,n) \
41	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
42
43#define tointeger(o,i) \
44    (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
45
46#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
47
48#define luaV_rawequalobj(t1,t2)		luaV_equalobj(NULL,t1,t2)
49
50
51/*
52** fast track for 'gettable': if 't' is a table and 't[k]' is not nil,
53** return 1 with 'slot' pointing to 't[k]' (final result).  Otherwise,
54** return 0 (meaning it will have to check metamethod) with 'slot'
55** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
56** 'f' is the raw get function to use.
57*/
58#define luaV_fastget(L,t,k,slot,f) \
59  (!ttistable(t)  \
60   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
61   : (slot = f(hvalue(t), k),  /* else, do raw access */  \
62      !ttisnil(slot)))  /* result not nil? */
63
64/*
65** standard implementation for 'gettable'
66*/
67#define luaV_gettable(L,t,k,v) { const TValue *slot; \
68  if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
69  else luaV_finishget(L,t,k,v,slot); }
70
71
72/*
73** Fast track for set table. If 't' is a table and 't[k]' is not nil,
74** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
75** return false with 'slot' equal to NULL (if 't' is not a table) or
76** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
77** returns true, there is no need to 'invalidateTMcache', because the
78** call is not creating a new entry.
79*/
80#define luaV_fastset(L,t,k,slot,f,v) \
81  (!ttistable(t) \
82   ? (slot = NULL, 0) \
83   : (slot = f(hvalue(t), k), \
84     ttisnil(slot) ? 0 \
85     : (luaC_barrierback(L, hvalue(t), v), \
86        setobj2t(L, cast(TValue *,slot), v), \
87        1)))
88
89
90#define luaV_settable(L,t,k,v) { const TValue *slot; \
91  if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
92    luaV_finishset(L,t,k,v,slot); }
93
94
95
96LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
97LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
98LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
99LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
100LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
101LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
102                               StkId val, const TValue *slot);
103LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
104                               StkId val, const TValue *slot);
105LUAI_FUNC void luaV_finishOp (lua_State *L);
106LUAI_FUNC void luaV_execute (lua_State *L);
107LUAI_FUNC void luaV_concat (lua_State *L, int total);
108LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
109LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
110LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
111LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
112
113#endif
114