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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.  
  7.  
  8. #ifndef lauxlib_h
  9. #define lauxlib_h
  10.  
  11.  
  12. #include <stddef.h>
  13. #include <stdio.h>
  14.  
  15. #include "lua.h"
  16.  
  17.  
  18. #if defined(LUA_COMPAT_GETN)
  19. LUALIB_API int (luaL_getn) (lua_State *L, int t);
  20. LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
  21. #else
  22. #define luaL_getn(L,i)          ((int)lua_objlen(L, i))
  23. #define luaL_setn(L,i,j)        ((void)0)  /* no op! */
  24. #endif
  25.  
  26. #if defined(LUA_COMPAT_OPENLIB)
  27. #define luaI_openlib    luaL_openlib
  28. #endif
  29.  
  30.  
  31. /* extra error code for `luaL_load' */
  32. #define LUA_ERRFILE     (LUA_ERRERR+1)
  33.  
  34.  
  35. typedef struct luaL_Reg {
  36.   const char *name;
  37.   lua_CFunction func;
  38. } luaL_Reg;
  39.  
  40.  
  41.  
  42. LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
  43.                                 const luaL_Reg *l, int nup);
  44. LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
  45.                                 const luaL_Reg *l);
  46. LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
  47. LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
  48. LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname);
  49. LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
  50. LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
  51.                                                           size_t *l);
  52. LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
  53.                                           const char *def, size_t *l);
  54. LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
  55. LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
  56.  
  57. LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
  58. LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
  59.                                           lua_Integer def);
  60.  
  61. LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
  62. LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
  63. LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
  64.  
  65. LUALIB_API int   (luaL_newmetatable) (lua_State *L, const char *tname);
  66. LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
  67.  
  68. LUALIB_API void (luaL_where) (lua_State *L, int lvl);
  69. LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
  70.  
  71. LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
  72.                                    const char *const lst[]);
  73.  
  74. LUALIB_API int (luaL_ref) (lua_State *L, int t);
  75. LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
  76.  
  77. LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
  78. LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
  79.                                   const char *name);
  80. LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
  81.  
  82. LUALIB_API lua_State *(luaL_newstate) (void);
  83.  
  84.  
  85. LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
  86.                                                   const char *r);
  87.  
  88. LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
  89.                                          const char *fname, int szhint);
  90.  
  91.  
  92.  
  93.  
  94. /*
  95. ** ===============================================================
  96. ** some useful macros
  97. ** ===============================================================
  98. */
  99.  
  100. #define luaL_argcheck(L, cond,numarg,extramsg)  \
  101.                 ((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
  102. #define luaL_checkstring(L,n)   (luaL_checklstring(L, (n), NULL))
  103. #define luaL_optstring(L,n,d)   (luaL_optlstring(L, (n), (d), NULL))
  104. #define luaL_checkint(L,n)      ((int)luaL_checkinteger(L, (n)))
  105. #define luaL_optint(L,n,d)      ((int)luaL_optinteger(L, (n), (d)))
  106. #define luaL_checklong(L,n)     ((long)luaL_checkinteger(L, (n)))
  107. #define luaL_optlong(L,n,d)     ((long)luaL_optinteger(L, (n), (d)))
  108.  
  109. #define luaL_typename(L,i)      lua_typename(L, lua_type(L,(i)))
  110.  
  111. #define luaL_dofile(L, fn) \
  112.         (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
  113.  
  114. #define luaL_dostring(L, s) \
  115.         (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
  116.  
  117. #define luaL_getmetatable(L,n)  (lua_getfield(L, LUA_REGISTRYINDEX, (n)))
  118.  
  119. #define luaL_opt(L,f,n,d)       (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
  120.  
  121. /*
  122. ** {======================================================
  123. ** Generic Buffer manipulation
  124. ** =======================================================
  125. */
  126.  
  127.  
  128.  
  129. typedef struct luaL_Buffer {
  130.   char *p;                      /* current position in buffer */
  131.   int lvl;  /* number of strings in the stack (level) */
  132.   lua_State *L;
  133.   char buffer[LUAL_BUFFERSIZE];
  134. } luaL_Buffer;
  135.  
  136. #define luaL_addchar(B,c) \
  137.   ((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
  138.    (*(B)->p++ = (char)(c)))
  139.  
  140. /* compatibility only */
  141. #define luaL_putchar(B,c)       luaL_addchar(B,c)
  142.  
  143. #define luaL_addsize(B,n)       ((B)->p += (n))
  144.  
  145. LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
  146. LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B);
  147. LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
  148. LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
  149. LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
  150. LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
  151.  
  152.  
  153. /* }====================================================== */
  154.  
  155.  
  156. /* compatibility with ref system */
  157.  
  158. /* pre-defined references */
  159. #define LUA_NOREF       (-2)
  160. #define LUA_REFNIL      (-1)
  161.  
  162. #define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
  163.       (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
  164.  
  165. #define lua_unref(L,ref)        luaL_unref(L, LUA_REGISTRYINDEX, (ref))
  166.  
  167. #define lua_getref(L,ref)       lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
  168.  
  169.  
  170. #define luaL_reg        luaL_Reg
  171.  
  172. #endif
  173.  
  174.  
  175.