ltm.h 2.9 KB

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  1. /*
  2. ** $Id: ltm.h $
  3. ** Tag methods
  4. ** See Copyright Notice in lua.h
  5. */
  6. #ifndef ltm_h
  7. #define ltm_h
  8. #include "lobject.h"
  9. /*
  10. * WARNING: if you change the order of this enumeration,
  11. * grep "ORDER TM" and "ORDER OP"
  12. */
  13. typedef enum {
  14. TM_INDEX,
  15. TM_NEWINDEX,
  16. TM_GC,
  17. TM_MODE,
  18. TM_LEN,
  19. TM_EQ, /* last tag method with fast access */
  20. TM_ADD,
  21. TM_SUB,
  22. TM_MUL,
  23. TM_MOD,
  24. TM_POW,
  25. TM_DIV,
  26. TM_IDIV,
  27. TM_BAND,
  28. TM_BOR,
  29. TM_BXOR,
  30. TM_SHL,
  31. TM_SHR,
  32. TM_UNM,
  33. TM_BNOT,
  34. TM_LT,
  35. TM_LE,
  36. TM_CONCAT,
  37. TM_CALL,
  38. TM_CLOSE,
  39. TM_N /* number of elements in the enum */
  40. } TMS;
  41. /*
  42. ** Mask with 1 in all fast-access methods. A 1 in any of these bits
  43. ** in the flag of a (meta)table means the metatable does not have the
  44. ** corresponding metamethod field. (Bit 6 of the flag indicates that
  45. ** the table is using the dummy node; bit 7 is used for 'isrealasize'.)
  46. */
  47. #define maskflags cast_byte(~(~0u << (TM_EQ + 1)))
  48. /*
  49. ** Test whether there is no tagmethod.
  50. ** (Because tagmethods use raw accesses, the result may be an "empty" nil.)
  51. */
  52. #define notm(tm) ttisnil(tm)
  53. #define checknoTM(mt,e) ((mt) == NULL || (mt)->flags & (1u<<(e)))
  54. #define gfasttm(g,mt,e) \
  55. (checknoTM(mt, e) ? NULL : luaT_gettm(mt, e, (g)->tmname[e]))
  56. #define fasttm(l,mt,e) gfasttm(G(l), mt, e)
  57. #define ttypename(x) luaT_typenames_[(x) + 1]
  58. LUAI_DDEC(const char *const luaT_typenames_[LUA_TOTALTYPES];)
  59. LUAI_FUNC const char *luaT_objtypename (lua_State *L, const TValue *o);
  60. LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);
  61. LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
  62. TMS event);
  63. LUAI_FUNC void luaT_init (lua_State *L);
  64. LUAI_FUNC void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
  65. const TValue *p2, const TValue *p3);
  66. LUAI_FUNC lu_byte luaT_callTMres (lua_State *L, const TValue *f,
  67. const TValue *p1, const TValue *p2, StkId p3);
  68. LUAI_FUNC void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
  69. StkId res, TMS event);
  70. LUAI_FUNC void luaT_tryconcatTM (lua_State *L);
  71. LUAI_FUNC void luaT_trybinassocTM (lua_State *L, const TValue *p1,
  72. const TValue *p2, int inv, StkId res, TMS event);
  73. LUAI_FUNC void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2,
  74. int inv, StkId res, TMS event);
  75. LUAI_FUNC int luaT_callorderTM (lua_State *L, const TValue *p1,
  76. const TValue *p2, TMS event);
  77. LUAI_FUNC int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2,
  78. int inv, int isfloat, TMS event);
  79. LUAI_FUNC void luaT_adjustvarargs (lua_State *L, int nfixparams,
  80. struct CallInfo *ci, const Proto *p);
  81. LUAI_FUNC void luaT_getvarargs (lua_State *L, struct CallInfo *ci,
  82. StkId where, int wanted);
  83. #endif