/*
 * Mesa 3-D graphics library
 * Version:  6.5
 *
 * Copyright (C) 2005-2006  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * \file slang_compile_operation.c
 * slang front-end compiler
 * \author Michal Krol
 */

#include "imports.h"
#include "slang_utility.h"
#include "slang_compile_variable.h"
#include "slang_compile_operation.h"

/* slang_operation */

int slang_operation_construct (slang_operation *oper)
{
	oper->type = slang_oper_none;
	oper->children = NULL;
	oper->num_children = 0;
	oper->literal = (float) 0;
	oper->a_id = SLANG_ATOM_NULL;
	oper->locals = (slang_variable_scope *) slang_alloc_malloc (sizeof (slang_variable_scope));
	if (oper->locals == NULL)
		return 0;
	if (!slang_variable_scope_construct (oper->locals))
	{
		slang_alloc_free (oper->locals);
		return 0;
	}
	return 1;
}

void slang_operation_destruct (slang_operation *oper)
{
	unsigned int i;

	for (i = 0; i < oper->num_children; i++)
		slang_operation_destruct (oper->children + i);
	slang_alloc_free (oper->children);
	slang_variable_scope_destruct (oper->locals);
	slang_alloc_free (oper->locals);
}

int slang_operation_copy (slang_operation *x, const slang_operation *y)
{
	slang_operation z;
	unsigned int i;

	if (!slang_operation_construct (&z))
		return 0;
	z.type = y->type;
	z.children = (slang_operation *) slang_alloc_malloc (y->num_children * sizeof (slang_operation));
	if (z.children == NULL)
	{
		slang_operation_destruct (&z);
		return 0;
	}
	for (z.num_children = 0; z.num_children < y->num_children; z.num_children++)
		if (!slang_operation_construct (&z.children[z.num_children]))
		{
			slang_operation_destruct (&z);
			return 0;
		}
	for (i = 0; i < z.num_children; i++)
		if (!slang_operation_copy (&z.children[i], &y->children[i]))
		{
			slang_operation_destruct (&z);
			return 0;
		}
	z.literal = y->literal;
	z.a_id = y->a_id;
	if (!slang_variable_scope_copy (z.locals, y->locals))
	{
		slang_operation_destruct (&z);
		return 0;
	}
	slang_operation_destruct (x);
	*x = z;
	return 1;
}