142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/*
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** $Id: lvm.h $
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** Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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#ifndef lvm_h
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#define lvm_h
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#include "ldo.h"
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#include "lobject.h"
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#include "ltm.h"
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#if !defined(LUA_NOCVTN2S)
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#define cvt2str(o) ttisnumber(o)
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#else
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#define cvt2str(o) 0 /* no conversion from numbers to strings */
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#endif
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#if !defined(LUA_NOCVTS2N)
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#define cvt2num(o) ttisstring(o)
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#else
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#define cvt2num(o) 0 /* no conversion from strings to numbers */
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#endif
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/*
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** You can define LUA_FLOORN2I if you want to convert floats to integers
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** by flooring them (instead of raising an error if they are not
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** integral values)
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*/
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#if !defined(LUA_FLOORN2I)
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#define LUA_FLOORN2I F2Ieq
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#endif
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/*
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** Rounding modes for float->integer coercion
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*/
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typedef enum {
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F2Ieq, /* no rounding; accepts only integral values */
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F2Ifloor, /* takes the floor of the number */
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F2Iceil /* takes the ceil of the number */
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} F2Imod;
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/* convert an object to a float (including string coercion) */
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#define tonumber(o,n) \
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(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
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/* convert an object to a float (without string coercion) */
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#define tonumberns(o,n) \
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(ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
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(ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))
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/* convert an object to an integer (including string coercion) */
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#define tointeger(o,i) \
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(l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
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: luaV_tointeger(o,i,LUA_FLOORN2I))
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/* convert an object to an integer (without string coercion) */
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#define tointegerns(o,i) \
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(l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
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: luaV_tointegerns(o,i,LUA_FLOORN2I))
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#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
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#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
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/*
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** fast track for 'gettable': if 't' is a table and 't[k]' is present,
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** return 1 with 'slot' pointing to 't[k]' (position of final result).
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** Otherwise, return 0 (meaning it will have to check metamethod)
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** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL
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** (otherwise). 'f' is the raw get function to use.
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*/
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#define luaV_fastget(L,t,k,slot,f) \
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(!ttistable(t) \
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? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
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: (slot = f(hvalue(t), k), /* else, do raw access */ \
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!isempty(slot))) /* result not empty? */
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/*
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** Special case of 'luaV_fastget' for integers, inlining the fast case
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** of 'luaH_getint'.
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*/
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#define luaV_fastgeti(L,t,k,slot) \
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(!ttistable(t) \
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? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
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: (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
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? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
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!isempty(slot))) /* result not empty? */
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/*
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** Finish a fast set operation (when fast get succeeds). In that case,
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** 'slot' points to the place to put the value.
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*/
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#define luaV_finishfastset(L,t,slot,v) \
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{ setobj2t(L, cast(TValue *,slot), v); \
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luaC_barrierback(L, gcvalue(t), v); }
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/*
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** Shift right is the same as shift left with a negative 'y'
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*/
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#define luaV_shiftr(x,y) luaV_shiftl(x,intop(-, 0, y))
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LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
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LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
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LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
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LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
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LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
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LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
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F2Imod mode);
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LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
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LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
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StkId val, const TValue *slot);
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LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
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TValue *val, const TValue *slot);
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LUAI_FUNC void luaV_finishOp (lua_State *L);
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LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci);
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LUAI_FUNC void luaV_concat (lua_State *L, int total);
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LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y);
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LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
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LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y);
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LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
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LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
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#endif
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