mirror of
https://github.com/lua/lua
synced 2024-11-29 16:13:17 +03:00
optimizations based on all types but number and nil are pointers
This commit is contained in:
Roberto Ierusalimschy
parent
9b45439860
commit
ac390020e9
13
lobject.c
13
lobject.c
@ -1,5 +1,5 @@
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/*
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** $Id: lobject.c,v 1.60 2001/01/24 15:45:33 roberto Exp roberto $
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** $Id: lobject.c,v 1.61 2001/01/25 16:45:36 roberto Exp roberto $
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** Some generic functions over Lua objects
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** See Copyright Notice in lua.h
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*/
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@ -37,15 +37,10 @@ int luaO_equalObj (const TObject *t1, const TObject *t2) {
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switch (ttype(t1)) {
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case LUA_TNUMBER:
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return nvalue(t1) == nvalue(t2);
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case LUA_TSTRING: case LUA_TUSERDATA:
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case LUA_TNIL:
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return 1;
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default: /* all other types are equal if pointers are equal */
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return tsvalue(t1) == tsvalue(t2);
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case LUA_TTABLE:
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return hvalue(t1) == hvalue(t2);
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case LUA_TFUNCTION:
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return clvalue(t1) == clvalue(t2);
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default:
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lua_assert(ttype(t1) == LUA_TNIL);
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return 1; /* LUA_TNIL */
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}
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}
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114
ltable.c
114
ltable.c
@ -1,5 +1,5 @@
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/*
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** $Id: ltable.c,v 1.67 2001/01/25 16:45:36 roberto Exp roberto $
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** $Id: ltable.c,v 1.68 2001/01/26 13:18:00 roberto Exp roberto $
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** Lua tables (hash)
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** See Copyright Notice in lua.h
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*/
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@ -31,8 +31,9 @@
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#define TagDefault LUA_TTABLE
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#define hashnum(t,n) (&t->node[(luint32)(lint32)(n)&(t->size-1)])
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#define hashstr(t,str) (&t->node[(str)->u.s.hash&(t->size-1)])
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#define hashnum(t,n) (&t->node[(luint32)(lint32)(n)&(t->size-1)])
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#define hashstr(t,str) (&t->node[(str)->u.s.hash&(t->size-1)])
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#define hashpointer(t,p) (&t->node[IntPoint(p)&(t->size-1)])
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/*
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@ -40,73 +41,18 @@
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** of its hash value)
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*/
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Node *luaH_mainposition (const Hash *t, const TObject *key) {
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luint32 h;
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switch (ttype(key)) {
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case LUA_TNUMBER:
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return hashnum(t, nvalue(key));
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case LUA_TSTRING:
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return hashstr(t, tsvalue(key));
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case LUA_TUSERDATA:
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h = IntPoint(tsvalue(key));
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break;
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case LUA_TTABLE:
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h = IntPoint(hvalue(key));
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break;
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case LUA_TFUNCTION:
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h = IntPoint(clvalue(key));
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break;
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default:
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return NULL; /* invalid key */
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}
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return &t->node[h&(t->size-1)];
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}
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static const TObject *luaH_getany (const Hash *t, const TObject *key) {
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Node *n = luaH_mainposition(t, key);
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while (n) {
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if (luaO_equalObj(key, &n->key))
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return &n->val;
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n = n->next;
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}
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return &luaO_nilobject; /* key not found */
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}
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/* specialized version for numbers */
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const TObject *luaH_getnum (const Hash *t, lua_Number key) {
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Node *n = hashnum(t, key);
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do {
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if (nvalue(&n->key) == key && ttype(&n->key) == LUA_TNUMBER)
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return &n->val;
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n = n->next;
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} while (n);
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return &luaO_nilobject; /* key not found */
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}
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/* specialized version for strings */
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const TObject *luaH_getstr (const Hash *t, TString *key) {
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Node *n = hashstr(t, key);
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do {
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if (tsvalue(&n->key) == key && ttype(&n->key) == LUA_TSTRING)
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return &n->val;
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n = n->next;
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} while (n);
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return &luaO_nilobject; /* key not found */
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}
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const TObject *luaH_get (const Hash *t, const TObject *key) {
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switch (ttype(key)) {
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case LUA_TNUMBER: return luaH_getnum(t, nvalue(key));
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case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));
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default: return luaH_getany(t, key);
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default: /* all other types are hashed as (void *) */
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return hashpointer(t, hvalue(key));
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}
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}
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Node *luaH_next (lua_State *L, const Hash *t, const TObject *key) {
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Node *luaH_next (lua_State *L, Hash *t, const TObject *key) {
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int i;
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if (ttype(key) == LUA_TNIL)
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i = 0; /* first iteration */
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@ -197,8 +143,8 @@ static void rehash (lua_State *L, Hash *t) {
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/*
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** inserts a new key into a hash table; first, check whether key's main
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** position is free; if not, check whether colliding node is in its main
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** position or not; if it is not, move colliding node to an empty place and
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** position is free. If not, check whether colliding node is in its main
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** position or not: if it is not, move colliding node to an empty place and
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** put new key in its main position; otherwise (colliding node is in its main
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** position), new key goes to an empty position.
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*/
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@ -234,20 +180,9 @@ static TObject *newkey (lua_State *L, Hash *t, Node *mp, const TObject *key) {
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}
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static TObject *luaH_setany (lua_State *L, Hash *t, const TObject *key) {
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Node *mp = luaH_mainposition(t, key);
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Node *n = mp;
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if (!mp)
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luaD_error(L, "table index is nil");
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do { /* check whether `key' is somewhere in the chain */
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if (luaO_equalObj(key, &n->key))
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return &n->val; /* that's all */
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else n = n->next;
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} while (n);
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return newkey(L, t, mp, key); /* `key' not found; must insert it */
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}
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/*
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** search function for numbers
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*/
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TObject *luaH_setnum (lua_State *L, Hash *t, lua_Number key) {
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TObject kobj;
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Node *mp = hashnum(t, key);
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@ -257,12 +192,16 @@ TObject *luaH_setnum (lua_State *L, Hash *t, lua_Number key) {
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return &n->val; /* that's all */
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else n = n->next;
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} while (n);
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if (L == NULL) return (TObject *)&luaO_nilobject; /* get option */
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/* `key' not found; must insert it */
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setnvalue(&kobj, key);
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return newkey(L, t, mp, &kobj);
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}
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/*
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** search function for strings
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*/
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TObject *luaH_setstr (lua_State *L, Hash *t, TString *key) {
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TObject kobj;
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Node *mp = hashstr(t, key);
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@ -272,16 +211,37 @@ TObject *luaH_setstr (lua_State *L, Hash *t, TString *key) {
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return &n->val; /* that's all */
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else n = n->next;
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} while (n);
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if (L == NULL) return (TObject *)&luaO_nilobject; /* get option */
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/* `key' not found; must insert it */
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setsvalue(&kobj, key);
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return newkey(L, t, mp, &kobj);
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}
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/*
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** search function for 'pointer' types
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*/
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static TObject *luaH_setany (lua_State *L, Hash *t, const TObject *key) {
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Node *mp = hashpointer(t, hvalue(key));
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Node *n = mp;
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do { /* check whether `key' is somewhere in the chain */
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/* compare as `hvalue', but may be other pointers (it is the same) */
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if (hvalue(&n->key) == hvalue(key) && ttype(&n->key) == ttype(key))
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return &n->val; /* that's all */
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else n = n->next;
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} while (n);
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if (L == NULL) return (TObject *)&luaO_nilobject; /* get option */
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return newkey(L, t, mp, key); /* `key' not found; must insert it */
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}
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TObject *luaH_set (lua_State *L, Hash *t, const TObject *key) {
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switch (ttype(key)) {
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case LUA_TNUMBER: return luaH_setnum(L, t, nvalue(key));
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case LUA_TSTRING: return luaH_setstr(L, t, tsvalue(key));
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case LUA_TNIL:
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if (L) luaD_error(L, "table index is nil");
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return (TObject *)&luaO_nilobject; /* get option */
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default: return luaH_setany(L, t, key);
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}
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}
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11
ltable.h
11
ltable.h
@ -1,5 +1,5 @@
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/*
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** $Id: ltable.h,v 1.27 2001/01/10 18:56:11 roberto Exp roberto $
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** $Id: ltable.h,v 1.28 2001/01/26 13:18:00 roberto Exp roberto $
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** Lua tables (hash)
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** See Copyright Notice in lua.h
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*/
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@ -14,13 +14,14 @@
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#define key(n) (&(n)->key)
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#define val(n) (&(n)->val)
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#define luaH_get(t,k) luaH_set(NULL,t,k)
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#define luaH_getnum(t,k) luaH_setnum(NULL,t,k)
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#define luaH_getstr(t,k) luaH_setstr(NULL,t,k)
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Hash *luaH_new (lua_State *L, int nhash);
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void luaH_free (lua_State *L, Hash *t);
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const TObject *luaH_get (const Hash *t, const TObject *key);
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const TObject *luaH_getnum (const Hash *t, lua_Number key);
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const TObject *luaH_getstr (const Hash *t, TString *key);
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TObject *luaH_set (lua_State *L, Hash *t, const TObject *key);
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Node * luaH_next (lua_State *L, const Hash *t, const TObject *r);
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Node * luaH_next (lua_State *L, Hash *t, const TObject *r);
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TObject *luaH_setnum (lua_State *L, Hash *t, lua_Number key);
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TObject *luaH_setstr (lua_State *L, Hash *t, TString *key);
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