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Dir : ~/usr/share/vulkan/registry/spec_tools/

Edit File: util.py

"""Utility functions not closely tied to other spec_tools types."""
# Copyright 2018-2019 Collabora, Ltd.
# Copyright 2013-2022 The Khronos Group Inc.
#
# SPDX-License-Identifier: Apache-2.0

def getElemName(elem, default=None):
    """Get the name associated with an element, either a name child or name attribute."""
    name_elem = elem.find('name')
    if name_elem is not None:
        return name_elem.text
    # Fallback if there is no child.
    return elem.get('name', default)

def getElemType(elem, default=None):
    """Get the type associated with an element, either a type child or type attribute."""
    type_elem = elem.find('type')
    if type_elem is not None:
        return type_elem.text
    # Fallback if there is no child.
    return elem.get('type', default)

def findFirstWithPredicate(collection, pred):
    """Return the first element that satisfies the predicate, or None if none exist.

NOTE: Some places where this is used might be better served by changing to a dictionary.
    """
    for elt in collection:
        if pred(elt):
            return elt
    return None

def findNamedElem(elems, name):
    """Traverse a collection of elements with 'name' nodes or attributes, looking for and returning one with the right name.

NOTE: Many places where this is used might be better served by changing to a dictionary.
    """
    return findFirstWithPredicate(elems, lambda elem: getElemName(elem) == name)

def findTypedElem(elems, typename):
    """Traverse a collection of elements with 'type' nodes or attributes, looking for and returning one with the right typename.

NOTE: Many places where this is used might be better served by changing to a dictionary.
    """
    return findFirstWithPredicate(elems, lambda elem: getElemType(elem) == typename)

def findNamedObject(collection, name):
    """Traverse a collection of elements with 'name' attributes, looking for and returning one with the right name.

NOTE: Many places where this is used might be better served by changing to a dictionary.
    """
    return findFirstWithPredicate(collection, lambda elt: elt.name == name)