#include"vartable.h"

#include"utils.h"
#include<stdlib.h>
#include<string.h>

VarTable *vartable_new(VarTable *parent) {
	VarTable *ret = malloc(sizeof(*ret));
	ret->parent = parent;
	ret->count = 0;
	ret->names = NULL;
	ret->data = NULL;
	
	return ret;
}

VarTableEntry *vartable_get(VarTable *this, const char *name) {
	for(size_t v = 0; v < this->count; v++) {
		if(!strcmp(name, this->names[v])) return this->data[v];
	}
	return NULL;
}

VarTableEntry *vartable_find(VarTable *this, const char *name) {
	VarTable *tbl = this;
	while(tbl) {
		VarTableEntry *entry = vartable_get(tbl, name);
		if(entry) {
			return entry;
		}
		tbl = tbl->parent;
	}
	return NULL;
}

VarTableEntry *vartable_set(VarTable *this, const char *name, VarTableEntry *e) {
	this->names = realloc(this->names, sizeof(*this->names) * (this->count + 1));
	this->data = realloc(this->data, sizeof(*this->data) * (this->count + 1));
	this->names[this->count] = name;
	this->data[this->count] = e;
	this->count++;
	return e;
}