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lvm.h 4.3 KB

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  1. /*
  2. ** $Id: lvm.h $
  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 F2Ieq
  28. #endif
  29. /*
  30. ** Rounding modes for float->integer coercion
  31. */
  32. typedef enum {
  33. F2Ieq, /* no rounding; accepts only integral values */
  34. F2Ifloor, /* takes the floor of the number */
  35. F2Iceil /* takes the ceil of the number */
  36. } F2Imod;
  37. /* convert an object to a float (including string coercion) */
  38. #define tonumber(o,n) \
  39. (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
  40. /* convert an object to a float (without string coercion) */
  41. #define tonumberns(o,n) \
  42. (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
  43. (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))
  44. /* convert an object to an integer (including string coercion) */
  45. #define tointeger(o,i) \
  46. (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
  47. /* convert an object to an integer (without string coercion) */
  48. #define tointegerns(o,i) \
  49. (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointegerns(o,i,LUA_FLOORN2I))
  50. #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
  51. #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
  52. /*
  53. ** fast track for 'gettable': if 't' is a table and 't[k]' is present,
  54. ** return 1 with 'slot' pointing to 't[k]' (position of final result).
  55. ** Otherwise, return 0 (meaning it will have to check metamethod)
  56. ** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL
  57. ** (otherwise). 'f' is the raw get function to use.
  58. */
  59. #define luaV_fastget(L,t,k,slot,f) \
  60. (!ttistable(t) \
  61. ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
  62. : (slot = f(hvalue(t), k), /* else, do raw access */ \
  63. !isempty(slot))) /* result not empty? */
  64. /*
  65. ** Special case of 'luaV_fastget' for integers, inlining the fast case
  66. ** of 'luaH_getint'.
  67. */
  68. #define luaV_fastgeti(L,t,k,slot) \
  69. (!ttistable(t) \
  70. ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
  71. : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
  72. ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
  73. !isempty(slot))) /* result not empty? */
  74. /*
  75. ** Finish a fast set operation (when fast get succeeds). In that case,
  76. ** 'slot' points to the place to put the value.
  77. */
  78. #define luaV_finishfastset(L,t,slot,v) \
  79. { setobj2t(L, cast(TValue *,slot), v); \
  80. luaC_barrierback(L, gcvalue(t), v); }
  81. LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
  82. LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
  83. LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
  84. LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
  85. LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
  86. LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
  87. F2Imod mode);
  88. LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
  89. LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
  90. StkId val, const TValue *slot);
  91. LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
  92. TValue *val, const TValue *slot);
  93. LUAI_FUNC void luaV_finishOp (lua_State *L);
  94. LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci);
  95. LUAI_FUNC void luaV_concat (lua_State *L, int total);
  96. LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y);
  97. LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
  98. LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y);
  99. LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
  100. LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
  101. #endif