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new API function `createuserdata'

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This commit is contained in:
Roberto Ierusalimschy
2000-10-26 10:47:05 -02:00
parent aadc35449e
commit b892f0a877
14 changed files with 83 additions and 66 deletions
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35
lstring.c
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@@ -1,5 +1,5 @@
/*
** $Id: lstring.c,v 1.42 2000/08/09 19:16:57 roberto Exp roberto $
** $Id: lstring.c,v 1.43 2000/09/29 12:42:13 roberto Exp roberto $
** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h
*/
@@ -81,17 +81,17 @@ static void newentry (lua_State *L, stringtable *tb, TString *ts, int h) {
TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
unsigned long h = hash_s(str, l);
int h1 = h&(L->strt.size-1);
int h1 = h & (L->strt.size-1);
TString *ts;
for (ts = L->strt.hash[h1]; ts; ts = ts->nexthash) {
if (ts->u.s.len == l && (memcmp(str, ts->str, l) == 0))
if (ts->len == l && (memcmp(str, ts->str, l) == 0))
return ts;
}
/* not found */
ts = (TString *)luaM_malloc(L, sizestring(l));
ts->marked = 0;
ts->nexthash = NULL;
ts->u.s.len = l;
ts->len = l;
ts->u.s.hash = h;
ts->u.s.constindex = 0;
memcpy(ts->str, str, l);
@@ -102,22 +102,31 @@ TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
}
TString *luaS_newudata (lua_State *L, size_t s, void *udata) {
TString *ts = (TString *)luaM_malloc(L, (lint32)sizeof(TString)+s);
ts->marked = 0;
ts->nexthash = NULL;
ts->len = s;
ts->u.d.tag = 0;
ts->u.d.value = (udata == NULL) ? ts+1 : udata;
L->nblocks += sizestring(s);
/* insert it on table */
newentry(L, &L->udt, ts, IntPoint(ts->u.d.value) & (L->udt.size-1));
return ts;
}
TString *luaS_createudata (lua_State *L, void *udata, int tag) {
unsigned long h = IntPoint(udata);
int h1 = h&(L->udt.size-1);
int h1 = IntPoint(udata) & (L->udt.size-1);
TString *ts;
for (ts = L->udt.hash[h1]; ts; ts = ts->nexthash) {
if (udata == ts->u.d.value && (tag == ts->u.d.tag || tag == LUA_ANYTAG))
return ts;
}
/* not found */
ts = luaM_new(L, TString);
ts->marked = 0;
ts->nexthash = NULL;
ts->u.d.value = udata;
ts->u.d.tag = (tag == LUA_ANYTAG) ? 0 : tag;
L->nblocks += gcsizeudata;
newentry(L, &L->udt, ts, h1); /* insert it on table */
ts = luaS_newudata(L, 0, udata);
if (tag != LUA_ANYTAG)
ts->u.d.tag = tag;
return ts;
}