/********************************************************/

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013,2014,2015  Z. Gilboa             */

/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */

/********************************************************/

#include <psxtypes/psxtypes.h>

#include <ntapi/nt_port.h>

#include <ntapi/nt_vmount.h>

#include <ntapi/ntapi.h>

#include "ntapi_impl.h"

nt_vms_node * __stdcall	__ntapi_vms_get_end_component_first_node(

	__in	nt_vms_system *		pvms_sys,

        __in	uint32_t		end_component_hash)

{

	nt_vms_node *	node;

	/* verify non-empty list and valid input */

	if (!pvms_sys->dev_name_head_node || !end_component_hash)

		return (nt_vms_node *)0;

	/* find first node by end component hash */

	node = (nt_vms_node *)((uintptr_t)pvms_sys + pvms_sys->end_component_head_node);

	while (node->next && (node->end_component_hash < end_component_hash))

		node = (nt_vms_node *)((uintptr_t)pvms_sys + node->next);

	if (node->end_component_hash == end_component_hash)

		return node;

	else

		return (nt_vms_node *)0;

}

static nt_vms_node * __stdcall	__ntapi_vms_get_node(

	__in	nt_vms_system *		pvms_sys,

        __in	uint32_t		end_component_hash,

        __in	uint32_t		dev_name_hash,

        __in	nt_large_integer	index_number)

{

	nt_vms_node *	node;

	/* verify non-empty list */

	if (!pvms_sys->dev_name_head_node)

		return (nt_vms_node *)0;

	/* end_component_hash */

	if (end_component_hash) {

		node = (nt_vms_node *)((uintptr_t)pvms_sys + pvms_sys->end_component_head_node);

		while (node->next && (node->end_component_hash < end_component_hash))

			node = (nt_vms_node *)((uintptr_t)pvms_sys + node->next);

		if (node->end_component_hash != end_component_hash)

			return (nt_vms_node *)0;

	} else

		node = (nt_vms_node *)((uintptr_t)pvms_sys + pvms_sys->dev_name_head_node);

	/* find device nodes */

	while (node->next && (node->dev_name_hash < dev_name_hash))

		node = (nt_vms_node *)((uintptr_t)pvms_sys + node->next);

	if (node->dev_name_hash != dev_name_hash)

		return (nt_vms_node *)0;

	/* find mount-point nodes */

	while (node->next && (node->index_number.quad < index_number.quad))

		node = (nt_vms_node *)((uintptr_t)pvms_sys + node->next);

	if (node->index_number.quad != index_number.quad)

		return (nt_vms_node *)0;

	return node;

}

nt_vms_node * __stdcall		__ntapi_vms_get_node_by_dev_name(

	__in	nt_vms_system *		pvms_sys,

        __in	uint32_t		dev_name_hash,

        __in	nt_large_integer	index_number)

{

	return __ntapi_vms_get_node(

		pvms_sys,

		0,

		dev_name_hash,

		index_number);

}

nt_vms_node * __stdcall		__ntapi_vms_get_node_by_end_component(

	__in	nt_vms_system *		pvms_sys,

        __in	uint32_t		end_component_hash,

        __in	uint32_t		dev_name_hash,

        __in	nt_large_integer	index_number)

{

	return __ntapi_vms_get_node(

		pvms_sys,

		end_component_hash,

		dev_name_hash,

		index_number);

}

nt_vms_point * __stdcall	__ntapi_vms_get_top_of_stack_mount_point(

	__in	nt_vms_system *		pvms_sys,

	__in	nt_vms_node *		node)

{

	nt_vms_point *	point;

	point = (nt_vms_point *)((uintptr_t)pvms_sys + node->stack);

	while (point->next)

		point = (nt_vms_point *)((uintptr_t)pvms_sys + point->next);

	return point;

}