mirror of https://github.com/lua/lua.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
1.9 KiB
107 lines
1.9 KiB
/*
|
|
** $Id: lfunc.c,v 1.5 1997/10/24 17:17:24 roberto Exp roberto $
|
|
** Lua Funcion auxiliar
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "lfunc.h"
|
|
#include "lmem.h"
|
|
#include "lstate.h"
|
|
|
|
#define gcsizeproto(p) 5
|
|
#define gcsizeclosure(c) 1
|
|
|
|
|
|
|
|
Closure *luaF_newclosure (int nelems)
|
|
{
|
|
Closure *c = (Closure *)luaM_malloc(sizeof(Closure)+nelems*sizeof(TObject));
|
|
luaO_insertlist(&(L->rootcl), (GCnode *)c);
|
|
L->nblocks += gcsizeclosure(c);
|
|
c->nelems = nelems;
|
|
return c;
|
|
}
|
|
|
|
|
|
void luaF_simpleclosure (TObject *o)
|
|
{
|
|
Closure *c = luaF_newclosure(0);
|
|
c->consts[0] = *o;
|
|
ttype(o) = LUA_T_FUNCTION;
|
|
clvalue(o) = c;
|
|
}
|
|
|
|
|
|
TProtoFunc *luaF_newproto (void)
|
|
{
|
|
TProtoFunc *f = luaM_new(TProtoFunc);
|
|
f->code = NULL;
|
|
f->lineDefined = 0;
|
|
f->fileName = NULL;
|
|
f->consts = NULL;
|
|
f->nconsts = 0;
|
|
f->locvars = NULL;
|
|
luaO_insertlist(&(L->rootproto), (GCnode *)f);
|
|
L->nblocks += gcsizeproto(f);
|
|
return f;
|
|
}
|
|
|
|
|
|
|
|
static void freefunc (TProtoFunc *f)
|
|
{
|
|
luaM_free(f->code);
|
|
luaM_free(f->locvars);
|
|
luaM_free(f->consts);
|
|
luaM_free(f);
|
|
}
|
|
|
|
|
|
void luaF_freeproto (TProtoFunc *l)
|
|
{
|
|
while (l) {
|
|
TProtoFunc *next = (TProtoFunc *)l->head.next;
|
|
L->nblocks -= gcsizeproto(l);
|
|
freefunc(l);
|
|
l = next;
|
|
}
|
|
}
|
|
|
|
|
|
void luaF_freeclosure (Closure *l)
|
|
{
|
|
while (l) {
|
|
Closure *next = (Closure *)l->head.next;
|
|
L->nblocks -= gcsizeclosure(l);
|
|
luaM_free(l);
|
|
l = next;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
** Look for n-esim local variable at line "line" in function "func".
|
|
** Returns NULL if not found.
|
|
*/
|
|
char *luaF_getlocalname (TProtoFunc *func, int local_number, int line)
|
|
{
|
|
int count = 0;
|
|
char *varname = NULL;
|
|
LocVar *lv = func->locvars;
|
|
if (lv == NULL)
|
|
return NULL;
|
|
for (; lv->line != -1 && lv->line < line; lv++) {
|
|
if (lv->varname) { /* register */
|
|
if (++count == local_number)
|
|
varname = lv->varname->str;
|
|
}
|
|
else /* unregister */
|
|
if (--count < local_number)
|
|
varname = NULL;
|
|
}
|
|
return varname;
|
|
}
|
|
|
|
|