1 /******************************************************************************
3 * Module Name: pswalk - Parser routines to walk parsed op tree(s)
5 *****************************************************************************/
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45 #include <contrib/dev/acpica/include/acpi.h>
46 #include <contrib/dev/acpica/include/accommon.h>
47 #include <contrib/dev/acpica/include/acparser.h>
49 #define _COMPONENT ACPI_PARSER
50 ACPI_MODULE_NAME ("pswalk")
53 /*******************************************************************************
55 * FUNCTION: AcpiPsDeleteParseTree
57 * PARAMETERS: SubtreeRoot - Root of tree (or subtree) to delete
61 * DESCRIPTION: Delete a portion of or an entire parse tree.
63 ******************************************************************************/
66 AcpiPsDeleteParseTree (
67 ACPI_PARSE_OBJECT *SubtreeRoot)
69 ACPI_PARSE_OBJECT *Op = SubtreeRoot;
70 ACPI_PARSE_OBJECT *Next = NULL;
71 ACPI_PARSE_OBJECT *Parent = NULL;
74 ACPI_FUNCTION_TRACE_PTR (PsDeleteParseTree, SubtreeRoot);
77 /* Visit all nodes in the subtree */
81 /* Check if we are not ascending */
85 /* Look for an argument or child of the current op */
87 Next = AcpiPsGetArg (Op, 0);
90 /* Still going downward in tree (Op is not completed yet) */
97 /* No more children, this Op is complete. */
99 Next = Op->Common.Next;
100 Parent = Op->Common.Parent;
104 /* If we are back to the starting point, the walk is complete. */
106 if (Op == SubtreeRoot)