lvm.h 3.6 KB

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  1. /*
  2. ** $Id: lvm.h,v 2.41.1.1 2017/04/19 17:20:42 roberto Exp $
  3. ** Lua virtual machine
  4. ** See Copyright Notice in lua.h
  5. */
  6. #ifndef lvm_h
  7. #define lvm_h
  8. #include "ldo.h"
  9. #include "lobject.h"
  10. #include "ltm.h"
  11. #if !defined(LUA_NOCVTN2S)
  12. #define cvt2str(o) ttisnumber(o)
  13. #else
  14. #define cvt2str(o) 0 /* no conversion from numbers to strings */
  15. #endif
  16. #if !defined(LUA_NOCVTS2N)
  17. #define cvt2num(o) ttisstring(o)
  18. #else
  19. #define cvt2num(o) 0 /* no conversion from strings to numbers */
  20. #endif
  21. /*
  22. ** You can define LUA_FLOORN2I if you want to convert floats to integers
  23. ** by flooring them (instead of raising an error if they are not
  24. ** integral values)
  25. */
  26. #if !defined(LUA_FLOORN2I)
  27. #define LUA_FLOORN2I 0
  28. #endif
  29. #define tonumber(o,n) \
  30. (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
  31. #define tointeger(o,i) \
  32. (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
  33. #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
  34. #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
  35. /*
  36. ** fast track for 'gettable': if 't' is a table and 't[k]' is not nil,
  37. ** return 1 with 'slot' pointing to 't[k]' (final result). Otherwise,
  38. ** return 0 (meaning it will have to check metamethod) with 'slot'
  39. ** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
  40. ** 'f' is the raw get function to use.
  41. */
  42. #define luaV_fastget(L,t,k,slot,f) \
  43. (!ttistable(t) \
  44. ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
  45. : (slot = f(hvalue(t), k), /* else, do raw access */ \
  46. !ttisnil(slot))) /* result not nil? */
  47. /*
  48. ** standard implementation for 'gettable'
  49. */
  50. #define luaV_gettable(L,t,k,v) { const TValue *slot; \
  51. if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
  52. else luaV_finishget(L,t,k,v,slot); }
  53. /*
  54. ** Fast track for set table. If 't' is a table and 't[k]' is not nil,
  55. ** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
  56. ** return false with 'slot' equal to NULL (if 't' is not a table) or
  57. ** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
  58. ** returns true, there is no need to 'invalidateTMcache', because the
  59. ** call is not creating a new entry.
  60. */
  61. #define luaV_fastset(L,t,k,slot,f,v) \
  62. (!ttistable(t) \
  63. ? (slot = NULL, 0) \
  64. : (slot = f(hvalue(t), k), \
  65. ttisnil(slot) ? 0 \
  66. : (luaC_barrierback(L, hvalue(t), v), \
  67. setobj2t(L, cast(TValue *,slot), v), \
  68. 1)))
  69. #define luaV_settable(L,t,k,v) { const TValue *slot; \
  70. if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
  71. luaV_finishset(L,t,k,v,slot); }
  72. LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
  73. LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
  74. LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
  75. LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
  76. LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
  77. LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
  78. StkId val, const TValue *slot);
  79. LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
  80. StkId val, const TValue *slot);
  81. LUAI_FUNC void luaV_finishOp (lua_State *L);
  82. LUAI_FUNC void luaV_execute (lua_State *L);
  83. LUAI_FUNC void luaV_concat (lua_State *L, int total);
  84. LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
  85. LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
  86. LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
  87. LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
  88. #endif