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userdata can handle arbitrary binary data;

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user tag is stored with data;
This commit is contained in:
Roberto Ierusalimschy 1997-02-11 09:40:01 -02:00
parent b48847c5fa
commit 205ee1ec84
6 changed files with 79 additions and 41 deletions
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7
tree.h
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@ -1,7 +1,7 @@
/*
** tree.h
** TecCGraf - PUC-Rio
** $Id: tree.h,v 1.13 1996/02/14 13:35:51 roberto Exp roberto $
** $Id: tree.h,v 1.14 1996/02/26 17:07:49 roberto Exp roberto $
*/
#ifndef tree_h
@ -14,15 +14,18 @@
typedef struct TaggedString
{
int tag; /* if != LUA_T_STRING, this is a userdata */
long size;
Word varindex; /* != NOT_USED if this is a symbol */
Word constindex; /* != NOT_USED if this is a constant */
unsigned long hash; /* 0 if not initialized */
int marked; /* for garbage collection; never collect (nor change) if > 1 */
char str[1]; /* \0 byte already reserved */
char str[1]; /* \0 byte already reserved; MAY BE NOT 0 TERMINATED!! */
} TaggedString;
TaggedString *lua_createstring (char *str);
TaggedString *luaI_createuserdata (char *buff, long size, int tag);
Long lua_strcollector (void);
#endif