lauxlib.h 5.6 KB

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  1. /*
  2. ** $Id: lauxlib.h,v 1.88.1.1 2007/12/27 13:02:25 roberto Exp $
  3. ** Auxiliary functions for building Lua libraries
  4. ** See Copyright Notice in lua.h
  5. */
  6. #ifndef lauxlib_h
  7. #define lauxlib_h
  8. #include <stddef.h>
  9. #include <stdio.h>
  10. #include "lua.h"
  11. #if defined(LUA_COMPAT_GETN)
  12. LUALIB_API int (luaL_getn) (lua_State *L, int t);
  13. LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
  14. #else
  15. #define luaL_getn(L,i) ((int)lua_objlen(L, i))
  16. #define luaL_setn(L,i,j) ((void)0) /* no op! */
  17. #endif
  18. #if defined(LUA_COMPAT_OPENLIB)
  19. #define luaI_openlib luaL_openlib
  20. #endif
  21. /* extra error code for `luaL_load' */
  22. #define LUA_ERRFILE (LUA_ERRERR+1)
  23. typedef struct luaL_Reg {
  24. const char *name;
  25. lua_CFunction func;
  26. } luaL_Reg;
  27. LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
  28. const luaL_Reg *l, int nup);
  29. LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
  30. const luaL_Reg *l);
  31. LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
  32. LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
  33. LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname);
  34. LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
  35. LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
  36. size_t *l);
  37. LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
  38. const char *def, size_t *l);
  39. LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
  40. LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
  41. LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
  42. LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
  43. lua_Integer def);
  44. LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
  45. LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
  46. LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
  47. LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
  48. LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
  49. LUALIB_API void (luaL_where) (lua_State *L, int lvl);
  50. LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
  51. LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
  52. const char *const lst[]);
  53. LUALIB_API int (luaL_ref) (lua_State *L, int t);
  54. LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
  55. LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
  56. LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
  57. const char *name);
  58. LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
  59. LUALIB_API lua_State *(luaL_newstate) (void);
  60. LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
  61. const char *r);
  62. LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
  63. const char *fname, int szhint);
  64. /*
  65. ** ===============================================================
  66. ** some useful macros
  67. ** ===============================================================
  68. */
  69. #define luaL_argcheck(L, cond,numarg,extramsg) \
  70. ((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
  71. #define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
  72. #define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
  73. #define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
  74. #define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
  75. #define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
  76. #define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
  77. #define luaL_typename(L,i) lua_typename(L, lua_type(L,(i)))
  78. #define luaL_dofile(L, fn) \
  79. (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
  80. #define luaL_dostring(L, s) \
  81. (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
  82. #define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n)))
  83. #define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
  84. /*
  85. ** {======================================================
  86. ** Generic Buffer manipulation
  87. ** =======================================================
  88. */
  89. typedef struct luaL_Buffer {
  90. char *p; /* current position in buffer */
  91. int lvl; /* number of strings in the stack (level) */
  92. lua_State *L;
  93. char buffer[LUAL_BUFFERSIZE];
  94. } luaL_Buffer;
  95. #define luaL_addchar(B,c) \
  96. ((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
  97. (*(B)->p++ = (char)(c)))
  98. /* compatibility only */
  99. #define luaL_putchar(B,c) luaL_addchar(B,c)
  100. #define luaL_addsize(B,n) ((B)->p += (n))
  101. LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
  102. LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B);
  103. LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
  104. LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
  105. LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
  106. LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
  107. /* }====================================================== */
  108. /* compatibility with ref system */
  109. /* pre-defined references */
  110. #define LUA_NOREF (-2)
  111. #define LUA_REFNIL (-1)
  112. #define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
  113. (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
  114. #define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref))
  115. #define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
  116. #define luaL_reg luaL_Reg
  117. #endif