/*
 * chr.h - Part characteristics
 *
 * Copyright 2012 by Werner Almesberger
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 */


#include "util.h"
#include "param.h"
#include "chr.h"


struct condition {
	struct value value;
	enum relop relop;
	struct condition *next;
};

struct selector {
	struct condition *cond;
	struct selector *next;
};

struct field {
	const char *name;
	const struct format *fmt;
	struct field *mark;
	struct selector *sel;
	struct field *next;
};

static struct field *fields = NULL, *curr_field = NULL, *mark = NULL;


const struct format *field_find(const char *name)
{
	const struct field *f;

	for (f = fields; f; f = f->next)
		if (f->name == name)
			return f->fmt;
	return NULL;
}


void field_add(const char *name, const struct format *fmt)
{
	struct field *field;

	if (field_find(name))
		yyerrorf("duplicate field \"%s\"", name);
	field = alloc_type(struct field);
	field->name = name;
	field->fmt = fmt;
	field->mark = (void *) 1; /* poison */
	field->sel = NULL;
	if (curr_field)
		curr_field->next = field;
	else
		fields = field;
	curr_field = field;
}


void field_mark(void)
{
	if (mark)
		mark->mark = curr_field;
	mark = curr_field;
}


void field_release(void)
{
	curr_field = mark;
	if (curr_field)
		mark = curr_field->mark;
}


void field_add_selector(enum relop relop, const char *word)
{
	
}


void field_more_selectors(void)
{
	if (curr_field->fmt->ops != &param_ops_set)
		;//yyerrorf("
}


void field_add_wildcard(void)
{
}