mirror of
https://github.com/lua/lua.git
synced 2024-11-24 10:43:44 +08:00
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/*
|
|
** $Id: lfunc.c,v 1.43 2001/03/26 14:31:49 roberto Exp roberto $
|
|
** Auxiliary functions to manipulate prototypes and closures
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
#define LUA_PRIVATE
|
|
#include "lua.h"
|
|
|
|
#include "lfunc.h"
|
|
#include "lmem.h"
|
|
#include "lstate.h"
|
|
|
|
|
|
#define sizeclosure(n) ((int)sizeof(Closure) + (int)sizeof(TObject)*((n)-1))
|
|
|
|
|
|
Closure *luaF_newclosure (lua_State *L, int nelems) {
|
|
Closure *c = (Closure *)luaM_malloc(L, sizeclosure(nelems));
|
|
c->next = G(L)->rootcl;
|
|
G(L)->rootcl = c;
|
|
c->mark = c;
|
|
c->nupvalues = nelems;
|
|
return c;
|
|
}
|
|
|
|
|
|
Proto *luaF_newproto (lua_State *L) {
|
|
Proto *f = luaM_new(L, Proto);
|
|
f->k = NULL;
|
|
f->sizek = 0;
|
|
f->kproto = NULL;
|
|
f->sizekproto = 0;
|
|
f->code = NULL;
|
|
f->sizecode = 0;
|
|
f->nupvalues = 0;
|
|
f->numparams = 0;
|
|
f->is_vararg = 0;
|
|
f->maxstacksize = 0;
|
|
f->marked = 0;
|
|
f->lineinfo = NULL;
|
|
f->sizelocvars = 0;
|
|
f->sizelineinfo = 0;
|
|
f->locvars = NULL;
|
|
f->lineDefined = 0;
|
|
f->source = NULL;
|
|
f->next = G(L)->rootproto; /* chain in list of protos */
|
|
G(L)->rootproto = f;
|
|
return f;
|
|
}
|
|
|
|
|
|
void luaF_freeproto (lua_State *L, Proto *f) {
|
|
luaM_freearray(L, f->code, f->sizecode, Instruction);
|
|
luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
|
|
luaM_freearray(L, f->k, f->sizek, TObject);
|
|
luaM_freearray(L, f->kproto, f->sizekproto, Proto *);
|
|
luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
|
|
luaM_freelem(L, f, Proto);
|
|
}
|
|
|
|
|
|
void luaF_freeclosure (lua_State *L, Closure *c) {
|
|
luaM_free(L, c, sizeclosure(c->nupvalues));
|
|
}
|
|
|
|
|
|
/*
|
|
** Look for n-th local variable at line `line' in function `func'.
|
|
** Returns NULL if not found.
|
|
*/
|
|
const l_char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
|
|
int i;
|
|
for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
|
|
if (pc < f->locvars[i].endpc) { /* is variable active? */
|
|
local_number--;
|
|
if (local_number == 0)
|
|
return getstr(f->locvars[i].varname);
|
|
}
|
|
}
|
|
return NULL; /* not found */
|
|
}
|
|
|