/*
 * history.c:
 *
 * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
 * All rights reserved.
 *
 */

static char rcsid[] = "$Id$";

/*
 * $Log$
 * Revision 1.1  2008/02/08 15:06:42  james
 * *** empty log message ***
 *
 */

#include "project.h"

History *history_new(int n)
{
History *ret;

ret=(History *) malloc(sizeof(History));
ret->lines=malloc(n*sizeof(History_ent));
memset(ret->lines,0,n*sizeof(History_ent));

ret->wptr=0;
ret->nlines=n;

return ret;
}

void history_free(History *h)
{
if (!h) return;
if (h->lines) free(h->lines);
free(h);
}


void history_add(History *h,CRT_CA *c)
{
if (!h) return;

memcpy(h->lines[h->wptr].line,c,sizeof(CRT_CA)*CRT_COLS);
h->wptr++;

if (h->wptr==h->nlines)
	h->wptr=0;

}