SEXP attribute_hidden do_args(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP s;
checkArity(op,args);
if (TYPEOF(CAR(args)) == STRSXP && length(CAR(args))==1) {
PROTECT(s = installTrChar(STRING_ELT(CAR(args), 0)));
SETCAR(args, findFun(s, rho));
UNPROTECT(1);
}
if (TYPEOF(CAR(args)) == CLOSXP) {
s = allocSExp(CLOSXP);
SET_FORMALS(s, FORMALS(CAR(args)));
SET_BODY(s, R_NilValue);
SET_CLOENV(s, R_GlobalEnv);
return s;
}
if (TYPEOF(CAR(args)) == BUILTINSXP || TYPEOF(CAR(args)) == SPECIALSXP) {
char *nm = PRIMNAME(CAR(args));
SEXP env, s2;
PROTECT_INDEX xp;
PROTECT_WITH_INDEX(env = findVarInFrame3(R_BaseEnv,
install(".ArgsEnv"), TRUE),
&xp);
if (TYPEOF(env) == PROMSXP) REPROTECT(env = eval(env, R_BaseEnv), xp);
PROTECT(s2 = findVarInFrame3(env, install(nm), TRUE));
if(s2 != R_UnboundValue) {
s = duplicate(s2);
SET_CLOENV(s, R_GlobalEnv);
UNPROTECT(2);
return s;
}
UNPROTECT(1); /* s2 */
REPROTECT(env = findVarInFrame3(R_BaseEnv, install(".GenericArgsEnv"),
TRUE), xp);
if (TYPEOF(env) == PROMSXP) REPROTECT(env = eval(env, R_BaseEnv), xp);
PROTECT(s2 = findVarInFrame3(env, install(nm), TRUE));
if(s2 != R_UnboundValue) {
s = allocSExp(CLOSXP);
SET_FORMALS(s, FORMALS(s2));
SET_BODY(s, R_NilValue);
SET_CLOENV(s, R_GlobalEnv);
UNPROTECT(2);
return s;
}
UNPROTECT(2);
}
return R_NilValue;
}
SEXP attribute_hidden do_envirgets(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP env, s = CAR(args);
checkArity(op, args);
check1arg(args, call, "x");
env = CADR(args);
if (TYPEOF(CAR(args)) == CLOSXP
&& (isEnvironment(env) ||
isEnvironment(env = simple_as_environment(env)) ||
isNull(env))) {
if (isNull(env))
error(_("use of NULL environment is defunct"));
if(MAYBE_SHARED(s))
/* this copies but does not duplicate args or code */
s = duplicate(s);
if (TYPEOF(BODY(s)) == BCODESXP)
/* switch to interpreted version if compiled */
SET_BODY(s, R_ClosureExpr(CAR(args)));
SET_CLOENV(s, env);
}
else if (isNull(env) || isEnvironment(env) ||
isEnvironment(env = simple_as_environment(env)))
setAttrib(s, R_DotEnvSymbol, env);
else
error(_("replacement object is not an environment"));
return s;
}
SEXP reassign_function(SEXP name, SEXP env, SEXP old_fun, SEXP new_fun)
{
if (TYPEOF(name) != SYMSXP) error("name must be a symbol");
if (TYPEOF(env) != ENVSXP) error("env must be an environment");
if (TYPEOF(old_fun) != CLOSXP) error("old_fun must be a function");
if (TYPEOF(new_fun) != CLOSXP) error("new_fun must be a function");
SET_FORMALS(old_fun, FORMALS(new_fun));
SET_BODY(old_fun, BODY(new_fun));
SET_CLOENV(old_fun, CLOENV(new_fun));
DUPLICATE_ATTRIB(old_fun, new_fun);
return R_NilValue;
}
SEXP InstanceObjectTable::methodClosure(const char *name) const {
static SEXP qtbaseNS = R_FindNamespace(mkString("qtbase"));
static SEXP qinvokeSym = install("qinvoke");
SEXP f, pf, body;
PROTECT(f = allocSExp(CLOSXP));
SET_CLOENV(f, qtbaseNS);
pf = allocList(1);
SET_FORMALS(f, pf);
SET_TAG(pf, R_DotsSymbol);
SETCAR(pf, R_MissingArg);
PROTECT(body =
lang4(qinvokeSym, _instance->sexp(), mkString(name), R_DotsSymbol));
SET_BODY(f, body);
UNPROTECT(2);
return f;
}
SEXP make_closure(SEXP body, SEXP formal_parameter_list, SEXP envir) {
SEXP closure, formals;
PROTECT(closure = allocSExp(CLOSXP));
SET_CLOENV(closure, envir);
const int number_of_formals = length(formal_parameter_list);
PROTECT(formals = allocList(number_of_formals));
SEXP formals_iterator = formals;
for (int i = 0; i < number_of_formals; i++, formals_iterator = CDR(formals_iterator)) {
SEXP formal = STRING_ELT(VECTOR_ELT(formal_parameter_list, i), 0);
SET_TAG(formals_iterator, CreateTag(formal));
SETCAR(formals_iterator, R_MissingArg);
}
SET_FORMALS(closure, formals);
SET_BODY(closure, body);
UNPROTECT(2);
return closure;
}
SEXP exprToFunction(int nVariables, const char **vaList, SEXP rExpr) {
PROTECT(rExpr);
SEXP charList, rChar, pl;
SEXP rFunc;
PROTECT(rFunc= allocSExp(CLOSXP));
SET_CLOENV(rFunc, R_GlobalEnv);
int i = 0, warn= 0, n= 0;
if(nVariables > 0) {
PROTECT(charList = allocVector(STRSXP, nVariables));
for(int i=0; i < nVariables; i++){ //TODO STRSXP fill
PROTECT(rChar= mkChar(vaList[i]));
SET_STRING_ELT(charList, i, rChar);
UNPROTECT(1);
}
PROTECT(charList= VectorToPairList(charList));
n= length(charList);
if(n > 0) {
PROTECT(pl = allocList(n));
if(n == 1) {
SET_TAG(pl, CreateTag(CAR(charList)));
SETCAR(pl, R_MissingArg);
}
else
{ SET_TAG(pl, CreateTag(CAR(charList)));
SETCAR(pl, R_MissingArg);
SEXP nextpl= CDR(pl);
SEXP nextChar= CDR(charList);
for (i= 1; i < n; i++, nextpl = CDR(nextpl), nextChar = CDR(nextChar)) {
SET_TAG(nextpl, CreateTag(CAR(nextChar)));
SETCAR(nextpl, R_MissingArg);
}
}
} }
SET_FORMALS(rFunc, pl);
SET_BODY(rFunc, rExpr);
//setAttrib(rFunc, R_SourceSymbol, eval(lang2(install("deparse"), rFunc), R_BaseEnv)); // TODO: Deparse not necessary
if(n > 0) {UNPROTECT(1);}
UNPROTECT(4);
return rFunc;
}
SEXP attribute_hidden mkCLOSXP(SEXP formals, SEXP body, SEXP rho)
{
SEXP c;
PROTECT(formals);
PROTECT(body);
PROTECT(rho);
c = allocSExp(CLOSXP);
#ifdef not_used_CheckFormals
if(isList(formals))
SET_FORMALS(c, formals);
else
error(_("invalid formal arguments for 'function'"));
#else
SET_FORMALS(c, formals);
#endif
switch (TYPEOF(body)) {
case CLOSXP:
case BUILTINSXP:
case SPECIALSXP:
case DOTSXP:
case ANYSXP:
error(_("invalid body argument for 'function'"));
break;
default:
SET_BODY(c, body);
break;
}
if(rho == R_NilValue)
SET_CLOENV(c, R_GlobalEnv);
else
SET_CLOENV(c, rho);
UNPROTECT(3);
return c;
}
SEXP deep_copy_closxp(SEXP closxp) {
SEXP copied_closxp = duplicate(closxp);
// duplicate() by default does a shallow copy of a CLOSXP body, fix this
SET_BODY(copied_closxp, duplicate(BODY(closxp)));
return copied_closxp;
}
static SEXP duplicate1(SEXP s, Rboolean deep)
{
SEXP t;
R_xlen_t i, n;
duplicate1_elts++;
duplicate_elts++;
switch (TYPEOF(s)) {
case NILSXP:
case SYMSXP:
case ENVSXP:
case SPECIALSXP:
case BUILTINSXP:
case EXTPTRSXP:
case BCODESXP:
case WEAKREFSXP:
return s;
case CLOSXP:
PROTECT(s);
PROTECT(t = allocSExp(CLOSXP));
SET_FORMALS(t, FORMALS(s));
SET_BODY(t, BODY(s));
SET_CLOENV(t, CLOENV(s));
DUPLICATE_ATTRIB(t, s, deep);
if (NOJIT(s)) SET_NOJIT(t);
if (MAYBEJIT(s)) SET_MAYBEJIT(t);
UNPROTECT(2);
break;
case LISTSXP:
PROTECT(s);
t = duplicate_list(s, deep);
UNPROTECT(1);
break;
case LANGSXP:
PROTECT(s);
PROTECT(t = duplicate_list(s, deep));
SET_TYPEOF(t, LANGSXP);
DUPLICATE_ATTRIB(t, s, deep);
UNPROTECT(2);
break;
case DOTSXP:
PROTECT(s);
PROTECT(t = duplicate_list(s, deep));
SET_TYPEOF(t, DOTSXP);
DUPLICATE_ATTRIB(t, s, deep);
UNPROTECT(2);
break;
case CHARSXP:
return s;
break;
case EXPRSXP:
case VECSXP:
n = XLENGTH(s);
PROTECT(s);
PROTECT(t = allocVector(TYPEOF(s), n));
for(i = 0 ; i < n ; i++)
SET_VECTOR_ELT(t, i, duplicate_child(VECTOR_ELT(s, i), deep));
DUPLICATE_ATTRIB(t, s, deep);
COPY_TRUELENGTH(t, s);
UNPROTECT(2);
break;
case LGLSXP: DUPLICATE_ATOMIC_VECTOR(int, LOGICAL, t, s, deep); break;
case INTSXP: DUPLICATE_ATOMIC_VECTOR(int, INTEGER, t, s, deep); break;
case REALSXP: DUPLICATE_ATOMIC_VECTOR(double, REAL, t, s, deep); break;
case CPLXSXP: DUPLICATE_ATOMIC_VECTOR(Rcomplex, COMPLEX, t, s, deep); break;
case RAWSXP: DUPLICATE_ATOMIC_VECTOR(Rbyte, RAW, t, s, deep); break;
case STRSXP:
/* direct copying and bypassing the write barrier is OK since
t was just allocated and so it cannot be older than any of
the elements in s. LT */
DUPLICATE_ATOMIC_VECTOR(SEXP, STRING_PTR, t, s, deep);
break;
case PROMSXP:
return s;
break;
case S4SXP:
PROTECT(s);
PROTECT(t = allocS4Object());
DUPLICATE_ATTRIB(t, s, deep);
UNPROTECT(2);
break;
default:
UNIMPLEMENTED_TYPE("duplicate", s);
t = s;/* for -Wall */
}
if(TYPEOF(t) == TYPEOF(s) ) { /* surely it only makes sense in this case*/
SET_OBJECT(t, OBJECT(s));
(IS_S4_OBJECT(s) ? SET_S4_OBJECT(t) : UNSET_S4_OBJECT(t));
}
return t;
}
