#include	"defs.h"
#include	"../filenames.h"

/*
 * Open a file for input or output.
 *
 * fn = file name
 * create = 1 if output
 */
fileopen(fn, create)
	STRING fn;
{
	if(openfd >= 0)
		fileclose();
	if(create)
		openfd = creat(fn, 0666);
	else
		openfd = open(fn, 0);

	if(openfd == -1) {
		error("cannot open file");
		return(junk(INT));
	}
	else
		return(1);
}

/*
 * Close an open file.
 */
fileclose()
{
	close(openfd);
	openfd = -1;
}

/*
 * Remember last file name. [see input, output]
 */
setname(fn)
	REG STRING fn;
{
	if(fn[0] == 0) {
		if(filename[0] == 0)
			error("no file name");
	}
	else
		movstr(fn, filename);
}