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 (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I)) 64 65 66/* convert an object to an integer (without string coercion) */ 67#define tointegerns(o,i) \ 68 (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointegerns(o,i,LUA_FLOORN2I)) 69 70 71#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 72 73#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 74 75 76/* 77** fast track for 'gettable': if 't' is a table and 't[k]' is present, 78** return 1 with 'slot' pointing to 't[k]' (position of final result). 79** Otherwise, return 0 (meaning it will have to check metamethod) 80** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL 81** (otherwise). 'f' is the raw get function to use. 82*/ 83#define luaV_fastget(L,t,k,slot,f) \ 84 (!ttistable(t) \ 85 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 86 : (slot = f(hvalue(t), k), /* else, do raw access */ \ 87 !isempty(slot))) /* result not empty? */ 88 89 90/* 91** Special case of 'luaV_fastget' for integers, inlining the fast case 92** of 'luaH_getint'. 93*/ 94#define luaV_fastgeti(L,t,k,slot) \ 95 (!ttistable(t) \ 96 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 97 : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \ 98 ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \ 99 !isempty(slot))) /* result not empty? */ 100 101 102/* 103** Finish a fast set operation (when fast get succeeds). In that case, 104** 'slot' points to the place to put the value. 105*/ 106#define luaV_finishfastset(L,t,slot,v) \ 107 { setobj2t(L, cast(TValue *,slot), v); \ 108 luaC_barrierback(L, gcvalue(t), v); } 109 110 111 112 113LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); 114LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); 115LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); 116LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); 117LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode); 118LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p, 119 F2Imod mode); 120LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode); 121LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, 122 StkId val, const TValue *slot); 123LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, 124 TValue *val, const TValue *slot); 125LUAI_FUNC void luaV_finishOp (lua_State *L); 126LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci); 127LUAI_FUNC void luaV_concat (lua_State *L, int total); 128LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y); 129LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); 130LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y); 131LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); 132LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); 133 134#endif 135