/*
** checks whether short string exists and reuses it or creates a new one
*/
static TString internshrstr(lua_State L, CharPtr str, uint l)
{
TString ts;
global_State g = G(L);
uint h = luaS_hash(str, l, g.seed);
TStringRef list = new TStringArrayRef(g.strt.hash, (int)lmod(h, g.strt.size));
lua_assert(str != null); /* otherwise 'memcmp'/'memcpy' are undefined */
for (ts = list.get(); ts != null; ts = ts.u.hnext)
{
if (l == ts.shrlen &&
(memcmp(str, getstr(ts), l * 1 /*sizeof(char)*/) == 0)) //FIXME:sizeof(char)
/* found! */
{
if (isdead(g, ts)) /* dead (but not collected yet)? */
{
changewhite(ts); /* resurrect it */
}
return(ts);
}
}
if (g.strt.nuse >= g.strt.size && g.strt.size <= MAX_INT / 2)
{
luaS_resize(L, g.strt.size * 2);
list = new TStringArrayRef(g.strt.hash, (int)lmod(h, g.strt.size)); /* recompute with new size */
}
ts = createstrobj(L, l, LUA_TSHRSTR, h);
memcpy(getstr(ts), str, l * 1 /*sizeof(char)*/);
ts.shrlen = cast_byte(l);
ts.u.hnext = list.get();
list.set(ts);
g.strt.nuse++;
return(ts);
}
public static void luaS_remove(lua_State L, TString ts)
{
stringtable tb = G(L).strt;
TStringRef p = new TStringArrayRef(tb.hash, (int)lmod(ts.hash, tb.size));
while (p.get() != ts) /* find previous element */
{
p = new TStringPtrRef(p.get());
}
p.set(p.get().u.hnext); /* remove element from its list */
tb.nuse--;
}
