lvm.h revision 1.11 
1/*	$NetBSD: lvm.h,v 1.11 2023/04/16 20:46:17 nikita Exp $	*/
2
3/*
4** Id: lvm.h
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		F2Ieq
39#endif
40
41
42/*
43** Rounding modes for float->integer coercion
44 */
45typedef enum {
46  F2Ieq,     /* no rounding; accepts only integral values */
47  F2Ifloor,  /* takes the floor of the number */
48  F2Iceil    /* takes the ceil of the number */
49} F2Imod;
50
51
52/* convert an object to a float (including string coercion) */
53#ifndef _KERNEL
54#define tonumber(o,n) \
55	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
56#else /* _KERNEL */
57#define tonumber       tointeger
58#endif /* _KERNEL */
59
60
61/* convert an object to a float (without string coercion) */
62#define tonumberns(o,n) \
63	(ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
64	(ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))
65
66
67/* convert an object to an integer (including string coercion) */
68#define tointeger(o,i) \
69  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
70                          : luaV_tointeger(o,i,LUA_FLOORN2I))
71
72
73/* convert an object to an integer (without string coercion) */
74#define tointegerns(o,i) \
75  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
76                          : luaV_tointegerns(o,i,LUA_FLOORN2I))
77
78
79#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
80
81#define luaV_rawequalobj(t1,t2)		luaV_equalobj(NULL,t1,t2)
82
83
84/*
85** fast track for 'gettable': if 't' is a table and 't[k]' is present,
86** return 1 with 'slot' pointing to 't[k]' (position of final result).
87** Otherwise, return 0 (meaning it will have to check metamethod)
88** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL
89** (otherwise). 'f' is the raw get function to use.
90*/
91#define luaV_fastget(L,t,k,slot,f) \
92  (!ttistable(t)  \
93   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
94   : (slot = f(hvalue(t), k),  /* else, do raw access */  \
95      !isempty(slot)))  /* result not empty? */
96
97
98/*
99** Special case of 'luaV_fastget' for integers, inlining the fast case
100** of 'luaH_getint'.
101*/
102#define luaV_fastgeti(L,t,k,slot) \
103  (!ttistable(t)  \
104   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
105   : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
106              ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
107      !isempty(slot)))  /* result not empty? */
108
109
110/*
111** Finish a fast set operation (when fast get succeeds). In that case,
112** 'slot' points to the place to put the value.
113*/
114#define luaV_finishfastset(L,t,slot,v) \
115    { setobj2t(L, cast(TValue *,slot), v); \
116      luaC_barrierback(L, gcvalue(t), v); }
117
118
119
120
121LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
122LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
123LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
124LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
125LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
126LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
127                                F2Imod mode);
128LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
129LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
130                               StkId val, const TValue *slot);
131LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
132                               TValue *val, const TValue *slot);
133LUAI_FUNC void luaV_finishOp (lua_State *L);
134LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci);
135LUAI_FUNC void luaV_concat (lua_State *L, int total);
136LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y);
137LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
138LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y);
139LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
140LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
141
142#endif
143