src/tree.h

   1 /*
   2 ** tree.h
   3 ** TecCGraf - PUC-Rio
   4 ** $Id: tree.h,v 1.18 1997/06/09 17:28:14 roberto Exp $
   5 */
   6
   7 #ifndef tree_h
   8 #define tree_h
   9
  10 #include "types.h"
  11
  12 #define NOT_USED  0xFFFE
  13
  14
  15 typedef struct TaggedString
  16 {
  17   int tag;  /* if != LUA_T_STRING, this is a userdata */
  18   struct TaggedString *next;
  19   union {
  20     struct {
  21       Word varindex;  /* != NOT_USED  if this is a symbol */
  22       Word constindex;  /* != NOT_USED  if this is a constant */
  23     } s;
  24     void *v;  /* if this is a userdata, here is its value */
  25   } u;
  26   unsigned long hash;  /* 0 if not initialized */
  27   int marked;   /* for garbage collection; never collect (nor change) if > 1 */
  28   char str[1];   /* \0 byte already reserved */
  29 } TaggedString;
  30
  31
  32 TaggedString *lua_createstring (char *str);
  33 TaggedString *luaI_createudata (void *udata, int tag);
  34 TaggedString *luaI_strcollector (long *cont);
  35 void luaI_strfree (TaggedString *l);
  36 void luaI_strcallIM (TaggedString *l);
  37
  38 #endif