client/deps/liblua/lvm.h

   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  */
  43 typedef 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
 120 LUAI_FUNC int luaV_equalobj(lua_State *L, const TValue *t1, const TValue *t2);
 121 LUAI_FUNC int luaV_lessthan(lua_State *L, const TValue *l, const TValue *r);
 122 LUAI_FUNC int luaV_lessequal(lua_State *L, const TValue *l, const TValue *r);
 123 LUAI_FUNC int luaV_tonumber_(const TValue *obj, lua_Number *n);
 124 LUAI_FUNC int luaV_tointeger(const TValue *obj, lua_Integer *p, F2Imod mode);
 125 LUAI_FUNC int luaV_tointegerns(const TValue *obj, lua_Integer *p,
 126                                F2Imod mode);
 127 LUAI_FUNC int luaV_flttointeger(lua_Number n, lua_Integer *p, F2Imod mode);
 128 LUAI_FUNC void luaV_finishget(lua_State *L, const TValue *t, TValue *key,
 129                               StkId val, const TValue *slot);
 130 LUAI_FUNC void luaV_finishset(lua_State *L, const TValue *t, TValue *key,
 131                               TValue *val, const TValue *slot);
 132 LUAI_FUNC void luaV_finishOp(lua_State *L);
 133 LUAI_FUNC void luaV_execute(lua_State *L, CallInfo *ci);
 134 LUAI_FUNC void luaV_concat(lua_State *L, int total);
 135 LUAI_FUNC lua_Integer luaV_idiv(lua_State *L, lua_Integer x, lua_Integer y);
 136 LUAI_FUNC lua_Integer luaV_mod(lua_State *L, lua_Integer x, lua_Integer y);
 137 LUAI_FUNC lua_Number luaV_modf(lua_State *L, lua_Number x, lua_Number y);
 138 LUAI_FUNC lua_Integer luaV_shiftl(lua_Integer x, lua_Integer y);
 139 LUAI_FUNC void luaV_objlen(lua_State *L, StkId ra, const TValue *rb);
 140
 141 #endif