Ben / Nujel

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

#include "closure.h"
#include "string.h"
#include "vec.h"

#ifndef COSMOPOLITAN_H_
	#include <stdlib.h>
#endif

lVal     lValList[VAL_MAX];
uint     lValActive = 0;
uint     lValMax    = 1;
uint     lValFFree  = 0;

void lInitVal(){
	lValActive = 0;
	lValMax    = 1;
}

lVal *lValAlloc(){
	lVal *ret;
	if(lValFFree == 0){
		if(lValMax >= VAL_MAX-1){
			lPrintError("lVal OOM\n");
			exit(1);
			return NULL;
		}
		ret = &lValList[lValMax++];
	}else{
		ret       = &lValList[lValFFree & VAL_MASK];
		lValFFree = ret->vCdr;
	}
	lValActive++;
	*ret = (lVal){0};
	return ret;
}

void lGUIWidgetFree(lVal *v);
void lValFree(lVal *v){
	if((v == NULL) || (v->type == ltNoAlloc)){return;}
	if(v->type == ltLambda){
		lClo(v->vCdr).refCount--;
	}else if(v->type == ltGUIWidget){
		lGUIWidgetFree(v);
	}
	lValActive--;
	v->type   = ltNoAlloc;
	v->vCdr   = lValFFree;
	lValFFree = v - lValList;
}

lVal *lValCopy(lVal *dst, const lVal *src){
	if((dst == NULL) || (src == NULL)){return NULL;}
	*dst = *src;
	if(dst->type == ltString){
		dst->vCdr = lStringNew(lStrData(src),lStringLength(&lStr(src)));
	}else if(dst->type == ltVec){
		dst->vCdr = lVecAlloc();
		lVecV(dst->vCdr) = lVecV(src->vCdr);
	}else if(dst->type == ltPair){
		dst->vList.car = lValDup(dst->vList.car);
		dst->vList.cdr = lValDup(dst->vList.cdr);
	}
	return dst;
}

lVal *lValInf(){
	lVal *ret = lValAlloc();
	if(ret == NULL){return ret;}
	ret->type = ltInf;
	return ret;
}

lVal *lValInt(int v){
	lVal *ret = lValAlloc();
	if(ret == NULL){return ret;}
	ret->type = ltInt;
	ret->vInt = v;
	return ret;
}

lVal *lValFloat(float v){
	lVal *ret   = lValAlloc();
	if(ret == NULL){return ret;}
	ret->type   = ltFloat;
	ret->vFloat = v;
	return ret;
}
lVal *lValBool(bool v){
	lVal *ret = lValAlloc();
	if(ret == NULL){return ret;}
	ret->type = ltBool;
	ret->vBool = v;
	return ret;
}

lVal *lValDup(const lVal *v){
	return v == NULL ? NULL : lValCopy(lValAlloc(),v);
}