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'lua_replace' implemented as a macro using 'lua_copy'

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This commit is contained in:
Roberto Ierusalimschy
2014-07-22 15:07:47 -03:00
parent c697aa30bc
commit 97e299c395
2 changed files with 13 additions and 23 deletions
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31
lapi.c
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@@ -1,5 +1,5 @@
/*
** $Id: lapi.c,v 2.229 2014/07/19 15:09:37 roberto Exp roberto $
** $Id: lapi.c,v 2.230 2014/07/21 16:02:57 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@@ -44,6 +44,9 @@ const char lua_ident[] =
/* test for pseudo index */
#define ispseudo(i) ((i) <= LUA_REGISTRYINDEX)
/* test for upvalue */
#define isupvalue(i) ((i) < LUA_REGISTRYINDEX)
/* test for valid but not pseudo index */
#define isstackindex(i, o) (isvalid(o) && !ispseudo(i))
@@ -214,31 +217,17 @@ LUA_API void lua_rotate (lua_State *L, int idx, int n) {
}
static void moveto (lua_State *L, TValue *fr, int idx) {
TValue *to = index2addr(L, idx);
LUA_API void lua_copy (lua_State *L, int fromidx, int toidx) {
TValue *fr, *to;
lua_lock(L);
fr = index2addr(L, fromidx);
to = index2addr(L, toidx);
api_checkvalidindex(to);
setobj(L, to, fr);
if (idx < LUA_REGISTRYINDEX) /* function upvalue? */
if (isupvalue(toidx)) /* function upvalue? */
luaC_barrier(L, clCvalue(L->ci->func), fr);
/* LUA_REGISTRYINDEX does not need gc barrier
(collector revisits it before finishing collection) */
}
LUA_API void lua_replace (lua_State *L, int idx) {
lua_lock(L);
api_checknelems(L, 1);
moveto(L, L->top - 1, idx);
L->top--;
lua_unlock(L);
}
LUA_API void lua_copy (lua_State *L, int fromidx, int toidx) {
TValue *fr;
lua_lock(L);
fr = index2addr(L, fromidx);
moveto(L, fr, toidx);
lua_unlock(L);
}