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size of short strings stored in a single byte, to reduce the size

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of struct 'TString'
This commit is contained in:
Roberto Ierusalimschy
2015-01-16 14:54:37 -02:00
parent 5b01cb39b5
commit 7e2015a46d
9 changed files with 69 additions and 45 deletions
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10
lapi.c
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@@ -1,5 +1,5 @@
/*
** $Id: lapi.c,v 2.243 2014/11/12 13:28:54 roberto Exp roberto $
** $Id: lapi.c,v 2.244 2014/12/26 14:43:45 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@@ -382,15 +382,17 @@ LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) {
luaO_tostring(L, o);
lua_unlock(L);
}
if (len != NULL) *len = tsvalue(o)->len;
if (len != NULL)
*len = vslen(o);
return svalue(o);
}
LUA_API size_t lua_rawlen (lua_State *L, int idx) {
StkId o = index2addr(L, idx);
switch (ttnov(o)) {
case LUA_TSTRING: return tsvalue(o)->len;
switch (ttype(o)) {
case LUA_TSHRSTR: return tsvalue(o)->shrlen;
case LUA_TLNGSTR: return tsvalue(o)->u.lnglen;
case LUA_TUSERDATA: return uvalue(o)->len;
case LUA_TTABLE: return luaH_getn(hvalue(o));
default: return 0;