1 files changed, 118 insertions, 0 deletions
diff --git a/src/vmount/ntapi_vms_helper.c b/src/vmount/ntapi_vms_helper.c
new file mode 100644
index 0000000..4134112
--- /dev/null
+++ b/src/vmount/ntapi_vms_helper.c
@@ -0,0 +1,118 @@
+/********************************************************/
+/*  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;
+}