Ben / Nujel

/* Nujel - Copyright (C) 2020-2021 - Benjamin Vincent Schulenburg
 * This project uses the MIT license, a copy should be included under /LICENSE
 */
#include "../operation.h"

#include "../display.h"
#include "../exception.h"
#include "../nujel.h"
#include "../collection/list.h"
#include "../type/native-function.h"
#include "../type/val.h"

static lVal *lnfCar(lClosure *c, lVal *v){
	(void)c;
	return lCaar(v);
}

static lVal *lnfCdr(lClosure *c, lVal *v){
	(void)c;
	return lCdar(v);
}

static lVal *lnfCons(lClosure *c, lVal *v){
	(void)c;
	if(lCddr(v) != NULL){
		lExceptionThrowValClo(":too-many-args","Cons should only be called with 2 arguments!", v, c);
	}
	return lCons(lCar(v),lCadr(v));
}

static lVal *lnfNReverse(lClosure *c, lVal *v){
	(void)c;
	lVal *t = NULL, *l = lCar(v);
	while((l != NULL) && (l->type == ltPair)){
		lVal *next = l->vList.cdr;
		l->vList.cdr = t;
		t = l;
		l = next;
	}
	return t;
}

void lOperationsList(lClosure *c){
	lAddNativeFunc(c,"car",  "[list]",     "Returs the head of LIST",          lnfCar);
	lAddNativeFunc(c,"cdr",  "[list]",     "Return the rest of LIST",          lnfCdr);
	lAddNativeFunc(c,"cons", "[car cdr]",  "Return a new pair of CAR and CDR", lnfCons);
	lAddNativeFunc(c,"nreverse","[list]",  "Return LIST in reverse order, fast but mutates", lnfNReverse);
}