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new function 'luaS_hashlongstr'

This commit is contained in:
Roberto Ierusalimschy 2015-11-03 13:36:01 -02:00
parent e61ee8a036
commit d356183402
2 changed files with 13 additions and 2 deletions
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12
lstring.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lstring.c,v 2.53 2015/09/22 14:18:24 roberto Exp roberto $
** $Id: lstring.c,v 2.54 2015/10/08 15:53:31 roberto Exp roberto $
** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h
*/
@ -56,6 +56,16 @@ unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
}
unsigned int luaS_hashlongstr (TString *ts) {
lua_assert(ts->tt == LUA_TLNGSTR);
if (ts->extra == 0) { /* no hash? */
ts->hash = luaS_hash(getstr(ts), ts->u.lnglen, ts->hash);
ts->extra = 1; /* now it has its hash */
}
return ts->hash;
}
/*
** resizes the string table
*/

3
lstring.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lstring.h,v 1.59 2015/03/25 13:42:19 roberto Exp roberto $
** $Id: lstring.h,v 1.60 2015/09/08 15:41:05 roberto Exp roberto $
** String table (keep all strings handled by Lua)
** See Copyright Notice in lua.h
*/
@ -34,6 +34,7 @@
LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
LUAI_FUNC void luaS_clearcache (global_State *g);