#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "../libueda/xga.h"
#include "../libunet/nethash.h"
#include "struct.h"

extern char *MCLfile;
extern char *input_filename;
extern char *output_filename;

extern struct net *net_list_head;
extern int ncomponents;
extern struct outcomp *netlist_comps;
extern struct outcomp *starpoint_list_head;

static FILE *outF;

generate_output()
{
	if (output_filename) {
		outF = fopen(output_filename, "w");
		if (!outF) {
			perror(output_filename);
			exit(1);
		}
	} else
		outF = stdout;
	fprintf(outF, "# This netlist has been generated by unet-bind\n");
	fprintf(outF, "# from %s and %s\n", MCLfile, input_filename);
	if (net_list_head)
		emit_output_nets();
	if (starpoint_list_head)
		emit_output_starpoints();
	if (ncomponents)
		emit_output_components();
	if (outF != stdout)
		fclose(outF);
}

emit_output_nets()
{
	register struct net *n;

	fprintf(outF, "\n# Nets unchanged from %s:\n#\n", input_filename);
	for (n = net_list_head; n; n = n->nextinlist)
		fprintf(outF, "NET %s\n", n->name);
}

emit_output_components()
{
	register int n;

	fprintf(outF, "\n# %d components from MCL:\n", ncomponents);
	for (n = 0; n < ncomponents; n++)
		emit_component_block(netlist_comps + n, "COMPONENT");
}

emit_output_starpoints()
{
	register struct outcomp *oc;

	fprintf(outF, "\n# Star connection points:\n");
	for (oc = starpoint_list_head; oc; oc = oc->next)
		emit_component_block(oc, "STARPOINT");
}

static void
emit_output_pin_number(oc, pinidx)
	register struct outcomp *oc;
	register int pinidx;
{
	register struct grid_pkg_desc *xga = oc->grid_pkg;
	int r, c;

	if (!xga) {
		fprintf(outF, "%d", pinidx + 1);
		return;
	}
	r = pinidx / xga->ncolumns;
	c = pinidx % xga->ncolumns;
	fprintf(outF, "%c%d", xga->row_letters[r], c + 1);
}

static void
emit_output_pin_line(oc, pinidx)
	register struct outcomp *oc;
	int pinidx;
{
	register struct pinconn *conn;

	fputs("  PIN ", outF);
	emit_output_pin_number(oc, pinidx);
	fputs(" = ", outF);
	conn = oc->conn_array[pinidx];
	if (!conn) {
		fprintf(outF, "NC (unet-bind found no connection)\n");
		return;
	}
	if (conn->net)
		fprintf(outF, "NET %s\n", conn->net->name);
	else
		fprintf(outF, "NC (%s)\n", conn->nc_comment);
}

emit_component_block(oc, comp_type_kw)
	register struct outcomp *oc;
	char *comp_type_kw;
{
	register int pinidx;

	fprintf(outF, "\n%s %s {\n", comp_type_kw, oc->name);
	if (oc->altname)
		fprintf(outF, "  ALTNAME %s\n", oc->altname);
	for (pinidx = 0; pinidx < oc->npins; pinidx++) {
		if (oc->grid_pkg && oc->grid_pkg->holes_array[pinidx])
			continue;
		emit_output_pin_line(oc, pinidx);
	}
	fputs("}\n", outF);
}