1/*
2** $Id: lvm.h $
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 F2Ieq
37#endif
38
39
40/*
41** Rounding modes for float->integer coercion
42 */
43typedef enum {
44 F2Ieq, /* no rounding; accepts only integral values */
45 F2Ifloor, /* takes the floor of the number */
46 F2Iceil /* takes the ceil of the number */
47} F2Imod;
48
49
50/* convert an object to a float (including string coercion) */
51#define tonumber(o,n) \
52 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
53
54
55/* convert an object to a float (without string coercion) */
56#define tonumberns(o,n) \
57 (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
58 (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))
59
60
61/* convert an object to an integer (including string coercion) */
62#define tointeger(o,i) \
63 (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
64 : luaV_tointeger(o,i,LUA_FLOORN2I))
65
66
67/* convert an object to an integer (without string coercion) */
68#define tointegerns(o,i) \
69 (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
70 : luaV_tointegerns(o,i,LUA_FLOORN2I))
71
72
73#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
74
75#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
76
77
78/*
79** fast track for 'gettable': if 't' is a table and 't[k]' is present,
80** return 1 with 'slot' pointing to 't[k]' (position of final result).
81** Otherwise, return 0 (meaning it will have to check metamethod)
82** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL
83** (otherwise). 'f' is the raw get function to use.
84*/
85#define luaV_fastget(L,t,k,slot,f) \
86 (!ttistable(t) \
87 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
88 : (slot = f(hvalue(t), k), /* else, do raw access */ \
89 !isempty(slot))) /* result not empty? */
90
91
92/*
93** Special case of 'luaV_fastget' for integers, inlining the fast case
94** of 'luaH_getint'.
95*/
96#define luaV_fastgeti(L,t,k,slot) \
97 (!ttistable(t) \
98 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
99 : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
100 ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
101 !isempty(slot))) /* result not empty? */
102
103
104/*
105** Finish a fast set operation (when fast get succeeds). In that case,
106** 'slot' points to the place to put the value.
107*/
108#define luaV_finishfastset(L,t,slot,v) \
109 { setobj2t(L, cast(TValue *,slot), v); \
110 luaC_barrierback(L, gcvalue(t), v); }
111
112
113/*
114** Shift right is the same as shift left with a negative 'y'
115*/
116#define luaV_shiftr(x,y) luaV_shiftl(x,intop(-, 0, y))
117
118
119
120LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
121LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
122LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
123LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
124LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
125LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
126 F2Imod mode);
127LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
128LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
129 StkId val, const TValue *slot);
130LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
131 TValue *val, const TValue *slot);
132LUAI_FUNC void luaV_finishOp (lua_State *L);
133LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci);
134LUAI_FUNC void luaV_concat (lua_State *L, int total);
135LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y);
136LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
137LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y);
138LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
139LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
140
141#endif