/*
 *	aegis - project change supervisor
 *	Copyright (C) 1991, 1992, 1993, 1994, 1996 Peter Miller;
 *	All rights reserved.
 *
 *	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.
 *
 *	This program 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 this program; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to manipulate types in aegis' data files
 */

#include <aer/expr/name.h>
#include <aer/value/enum.h>
#include <aer/value/integer.h>
#include <aer/value/real.h>
#include <aer/value/string.h>
#include <aer/value/struct.h>
#include <aer/value/time.h>
#include <error.h>
#include <fstrcmp.h>
#include <trace.h>
#include <type.h>
#include <zero.h>


static rpt_value_ty *integer_convert _((void *));

static rpt_value_ty *
integer_convert(this)
	void		*this;
{
	return rpt_value_integer(magic_zero_decode(*(long *)this));
}


static int integer_is_set _((void *));

static int
integer_is_set(this)
	void		*this;
{
	return (*(long *)this != 0);
}


type_ty	integer_type =
{
	"integer",
	0, /* alloc */
	0, /* free */
	0, /* enum_parse */
	0, /* list_parse */
	0, /* struct_parse */
	0, /* fuzzy */
	integer_convert,
	integer_is_set,
};


static rpt_value_ty *time_convert _((void *));

static rpt_value_ty *
time_convert(this)
	void		*this;
{
	return rpt_value_time(*(time_t *)this);
}


static int time_is_set _((void *));

static int
time_is_set(this)
	void		*this;
{
	return (*(time_t *)this != 0);
}


type_ty	time_type =
{
	"time",
	0, /* alloc */
	0, /* free */
	0, /* enum_parse */
	0, /* list_parse */
	0, /* struct_parse */
	0, /* fuzzy */
	time_convert,
	time_is_set,
};


static rpt_value_ty *real_convert _((void *));

static rpt_value_ty *
real_convert(this)
	void		*this;
{
	return rpt_value_real(*(double *)this);
}


static int real_is_set _((void *));

static int
real_is_set(this)
	void		*this;
{
	return (*(double *)this != 0);
}


type_ty	real_type =
{
	"real",
	0, /* alloc */
	0, /* free */
	0, /* enum_parse */
	0, /* list_parse */
	0, /* struct_parse */
	0, /* fuzzy */
	real_convert,
	real_is_set,
};


static rpt_value_ty *string_convert _((void *));

static rpt_value_ty *
string_convert(this)
	void		*this;
{
	return rpt_value_string(*(string_ty **)this);
}


static int string_is_set _((void *));

static int
string_is_set(this)
	void		*this;
{
	return (*(string_ty **)this != 0);
}


type_ty string_type =
{
	"string",
	0, /* alloc */
	0, /* free */
	0, /* enum_parse */
	0, /* list_parse */
	0, /* struct_parse */
	0, /* fuzzy */
	string_convert,
	string_is_set,
};


void *
generic_struct_parse(this, name, type_pp, mask_p, table, table_length)
	void		*this;
	string_ty	*name;
	type_ty		**type_pp;
	unsigned long	*mask_p;
	type_table_ty	*table;
	size_t		table_length;
{
	type_table_ty	*tp;
	void		*addr;
	type_table_ty	*table_end;

	trace(("generic_struct_parse(this = %08lX, name = %08lX, \
type_pp = %08lX)\n{\n"/*}*/, (long)this, (long)name, (long)type_pp));
	table_end = table + table_length;
	addr = 0;
	for (tp = table; tp < table_end; ++tp)
	{
		if (!tp->fast_name)
			tp->fast_name = str_from_c(tp->name);
		if (str_equal(name, tp->fast_name))
		{
			*type_pp = tp->type;
			trace_pointer(*type_pp);
			addr = (char *)this + tp->offset;
			trace_pointer(addr);
			*mask_p = tp->mask;
			break;
		}
	}
	trace((/*{*/"return %08lX;\n}\n", (long)addr));
	return addr;
}


string_ty *
generic_struct_fuzzy(name, table, table_length)
	string_ty	*name;
	type_table_ty	*table;
	size_t		table_length;
{
	type_table_ty	*tp;
	type_table_ty	*table_end;
	string_ty	*best_name;
	double		best_weight;

	trace(("generic_struct_fuzzy(name = %08lX)\n{\n"/*}*/, (long)name));
	table_end = table + table_length;
	best_name = 0;
	best_weight = 0.6;
	for (tp = table; tp < table_end; ++tp)
	{
		double		weight;

		assert(tp->fast_name);
		weight = fstrcmp(name->str_text, tp->name);
		if (weight > best_weight)
		{
			best_name = tp->fast_name;
			best_weight = weight;
		}
	}
	trace(("return %08lX;\n", (long)best_name));
	trace((/*{*/"}\n"));
	return best_name;
}


rpt_value_ty *
generic_struct_convert(that, table, table_length)
	void		*that;
	type_table_ty	*table;
	size_t		table_length;
{
	generic_struct_ty *this;
	type_table_ty	*tp;
	type_table_ty	*table_end;
	rpt_value_ty	*result;

	this = *(generic_struct_ty **)that;
	if (!this)
		return 0;
	trace(("generic_struct_convert(this = %08lX)\n{\n"/*}*/, (long)this));
	table_end = table + table_length;
	result = rpt_value_struct((struct symtab_ty *)0);
	for (tp = table; tp < table_end; ++tp)
	{
		void		*addr;

		if (!tp->fast_name)
			tp->fast_name = str_from_c(tp->name);
		addr = (char *)this + tp->offset;
		if (tp->mask ? (this->mask & tp->mask) : tp->type->is_set(addr))
		{
			rpt_value_ty	*vp;

			vp = tp->type->convert(addr);
			if (vp)
			{
				rpt_value_struct__set(result, tp->fast_name, vp);
				rpt_value_free(vp);
			}
		}
	}
	trace((/*{*/"return %08lX;\n}\n", (long)result));
	return result;
}


int
generic_struct_is_set(this)
	void		*this;
{
	return (*(generic_struct_ty **)this != 0);
}


string_ty *
generic_enum_fuzzy(name, table, table_length)
	string_ty	*name;
	string_ty	**table;
	size_t		table_length;
{
	int		j;
	string_ty	*best_name;
	double		best_weight;

	best_name = 0;
	best_weight = 0.6;
	for (j = 0; j < table_length; ++j)
	{
		double		weight;

		assert(table[j]);
		weight = fstrcmp(name->str_text, table[j]->str_text);
		if (weight > best_weight)
		{
			best_name = table[j];
			best_weight = weight;
		}
	}
	return best_name;
}


rpt_value_ty *
generic_enum_convert(this, table, table_length)
	void		*this;
	string_ty	**table;
	size_t		table_length;
{
	long		n;

	n = *(int *)this;
	if (n < 0 || n >= table_length)
		return rpt_value_integer(n);
	assert(table[n]);
	return rpt_value_enumeration(n, table[n]);
}


int
generic_enum_is_set(this)
	void		*this;
{
	return (*(int *)this != 0);
}


void
generic_enum__init(table, table_length)
	char		**table;
	size_t		table_length;
{
	long		j;
	string_ty	*name;
	rpt_value_ty	*value;

	for (j = 0; j < table_length; ++j)
	{
		name = str_from_c(table[j]);
		value = rpt_value_enumeration(j, name);
		rpt_expr_name__init(name, value);
		str_free(name);
	}
}


static int enum_option;


void
type_enum_option_set()
{
	enum_option = 1;
}


int
type_enum_option_query()
{
	return enum_option;
}


void
type_enum_option_clear()
{
	enum_option = 0;
}