/*
 * main() function for ueda-sverp
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "struct.h"

struct module_def *glob_module_list, *top_module_def;
char *primitives_filename = "primitives", *top_module_expl;
int verbose, top_module_candidates;
char *output_filename = "sverp.out";

static void
usage()
{
	fprintf(stderr,
"usage: ueda-sverp [-p primfile] [-t top-module] [-v] verilog-sources\n");
	exit(1);
}

static void
process_options(argc, argv)
	char **argv;
{
	register int c;

	while ((c = getopt(argc, argv, "I:o:p:t:v")) != EOF) {
		switch (c) {
		case 'I':
			add_symfile_dir(optarg);
			continue;
		case 'o':
			output_filename = optarg;
			continue;
		case 'p':
			primitives_filename = optarg;
			continue;
		case 't':
			top_module_expl = optarg;
			continue;
		case 'v':
			verbose++;
			continue;
		default:
			usage();
		}
	}
}

main(argc, argv)
	char **argv;
{
	extern int optind;

	process_options(argc, argv);
	if (optind >= argc)
		usage();
	for (; optind < argc; optind++) {
		if (verbose)
			printf("Reading Verilog source %s\n", argv[optind]);
		read_verilog_file(argv[optind]);
	}
	if (top_module_expl)
		process_explicit_topmod();
	if (verbose)
		printf("Reading primitive definitions from %s\n",
			primitives_filename);
	set_default_sympath();	/* for xGA definition files */
	read_primitives_file(primitives_filename);
	if (verbose)
		printf("Linking instantiations to lower modules\n");
	link_pass();
	if (!top_module_def) {
		fprintf(stderr, "error: no top module found\n");
		exit(1);
	}
	if (!top_module_expl && top_module_candidates > 1) {
		fprintf(stderr,
		"error: more than one top module candidate, use -t option\n");
		exit(1);
	}
	if (verbose)
		printf("Elaborating hierarchy from top module %s\n",
			top_module_def->name);
	elaborate_module(top_module_def, top_module_def->name, "", 0);
	tally_output_nets();
	generate_output();
	exit(0);
}