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  1. /*
  2. ** $Id: lstring.h $
  3. ** String table (keep all strings handled by Lua)
  4. ** See Copyright Notice in lua.h
  5. */
  6.  
  7. #ifndef lstring_h
  8. #define lstring_h
  9.  
  10. #include "lgc.h"
  11. #include "lobject.h"
  12. #include "lstate.h"
  13.  
  14.  
  15. /*
  16. ** Memory-allocation error message must be preallocated (it cannot
  17. ** be created after memory is exhausted)
  18. */
  19. #define MEMERRMSG       "not enough memory"
  20.  
  21.  
  22. /*
  23. ** Size of a TString: Size of the header plus space for the string
  24. ** itself (including final '\0').
  25. */
  26. #define sizelstring(l)  (offsetof(TString, contents) + ((l) + 1) * sizeof(char))
  27.  
  28. #define luaS_newliteral(L, s)   (luaS_newlstr(L, "" s, \
  29.                                  (sizeof(s)/sizeof(char))-1))
  30.  
  31.  
  32. /*
  33. ** test whether a string is a reserved word
  34. */
  35. #define isreserved(s)   ((s)->tt == LUA_VSHRSTR && (s)->extra > 0)
  36.  
  37.  
  38. /*
  39. ** equality for short strings, which are always internalized
  40. */
  41. #define eqshrstr(a,b)   check_exp((a)->tt == LUA_VSHRSTR, (a) == (b))
  42.  
  43.  
  44. LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
  45. LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
  46. LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
  47. LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
  48. LUAI_FUNC void luaS_clearcache (global_State *g);
  49. LUAI_FUNC void luaS_init (lua_State *L);
  50. LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
  51. LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue);
  52. LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
  53. LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
  54. LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);
  55.  
  56.  
  57. #endif
  58.