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/* This file is part of Eclat.
   Copyright (C) 2012 Sergey Poznyakoff.
 
   Eclat is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.
 
   Eclat is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with Eclat.  If not, see <http://www.gnu.org/licenses/>. */

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif
#include <errno.h>
#include <sysexits.h>
#include <libeclat.h>
#include "forlan.h"
#include <sys/stat.h>

void
usage()
{
	printf("usage: %s [-dD] FILE [INPUT]\n");
}

int
main(int argc, char **argv)
{
	FILE *fp;
	char *buf;
	size_t len;
	struct stat st;
	struct grecs_locus_point pt;
	int rc;
	int dump_option = 0;
	
	set_program_name(argv[0]);
	forlan_init();

	while ((rc = getopt(argc, argv, "Dd:h")) != EOF)
		switch (rc) {
		case 'D':
			dump_option++;
			break;
			
		case 'd':
			if (parse_debug_level(optarg))
				die(EX_USAGE, "bad debug category or level");
			break;

		case 'h':
			usage();
			return 0;

		default:
			exit(EX_USAGE);
		}
	argc -= optind;
	argv += optind;

	
	if (argc == 0 || argc > 2)
		die(EX_USAGE, "one or two arguments expected");
	if (stat(argv[0], &st))
		die(EX_UNAVAILABLE, "cannot stat input file \"%s\": %s",
		    argv[0], strerror(errno));
	len = st.st_size;
	buf = grecs_malloc(len);
	fp = fopen(argv[0], "r");
	if (!fp)
		die(EX_UNAVAILABLE, "cannot open input file \"%s\": %s",
		    argv[0], strerror(errno));
	if (fread(buf, len, 1, fp) != 1)
		die(EX_UNAVAILABLE, "error reading from \"%s\": %s",
		    argv[0], strerror(errno));
	fclose(fp);

	pt.file = argv[0];
	pt.line = 1;
	pt.col = 0;

	rc = forlan_parse(buf, len, &pt);
	if (rc == 0) {
		if (dump_option)
			forlan_dump_tree(stdout, forlan_parse_tree);
		forlan_node_free(forlan_parse_tree);
	}
	return rc ? EX_UNAVAILABLE : 0;
}

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