Subversion Repositories NedoOS

Rev

Blame | Last modification | View Log | Download

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