vulkan/util: Use str.removeprefix() from Python 3.9

Signed-off-by: Ernst Persson <ernstp@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36398>

src/vulkan/util/vk_physical_device_features_gen.py

@@ -34,11 +34,6 @@ import mako
 from mako.template import Template
 from vk_extensions import Requirements, get_all_required, filter_api
 
-def str_removeprefix(s, prefix):
-    if s.startswith(prefix):
-        return s[len(prefix):]
-    return s
-
 RENAMED_FEATURES = {
     # See https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17272#note_1446477 for details
     ('BufferDeviceAddressFeaturesEXT', 'bufferDeviceAddressCaptureReplay'): 'bufferDeviceAddressCaptureReplayEXT',
@@ -154,7 +149,7 @@ for (feature_structs, features) in KNOWN_ALIASES:
             RENAMED_FEATURES[rename] = flag
 
 def get_renamed_feature(c_type, feature):
-    return RENAMED_FEATURES.get((str_removeprefix(c_type, 'VkPhysicalDevice'), feature), feature)
+    return RENAMED_FEATURES.get((c_type.removeprefix('VkPhysicalDevice'), feature), feature)
 
 @dataclass
 class FeatureStruct:
@@ -485,12 +480,12 @@ def get_feature_structs_from_xml(xml_files, beta, api='vulkan'):
             if renamed_flag not in features:
                 features[renamed_flag] = f.c_type
             else:
-                a = str_removeprefix(features[renamed_flag], 'VkPhysicalDevice')
-                b = str_removeprefix(f.c_type, 'VkPhysicalDevice')
+                a = features[renamed_flag].removeprefix('VkPhysicalDevice')
+                b = f.c_type.removeprefix('VkPhysicalDevice')
                 if (a, flag) not in RENAMED_FEATURES or (b, flag) not in RENAMED_FEATURES:
                     diagnostics.append(f'{a} and {b} both define {flag}')
 
-            unused_renames.pop((str_removeprefix(f.c_type, 'VkPhysicalDevice'), flag), None)
+            unused_renames.pop((f.c_type.removeprefix('VkPhysicalDevice'), flag), None)
 
     for rename in unused_renames:
         diagnostics.append(f'unused rename {rename}')

src/vulkan/util/vk_physical_device_properties_gen.py

@@ -36,11 +36,6 @@ from mako.template import Template
 
 from vk_extensions import get_all_required, filter_api
 
-def str_removeprefix(s, prefix):
-    if s.startswith(prefix):
-        return s[len(prefix):]
-    return s
-
 # Some extensions have been promoted to core, their properties are renamed
 # in the following hashtable.
 # The hashtable takes the form:
@@ -320,7 +315,7 @@ def get_property_structs(doc, api, beta):
             if "STRUCTURE_TYPE" in str(elem.attrib):
                 s_type = elem.attrib.get("values")
 
-        name = str_removeprefix(full_name, "VkPhysicalDevice")
+        name = full_name.removeprefix("VkPhysicalDevice")
 
         # collect a list of properties
         properties = []

src/vulkan/util/vk_physical_device_spirv_caps_gen.py

@@ -6,7 +6,7 @@ COPYRIGHT=u"""
 """
 
 import argparse
-from vk_physical_device_features_gen import get_renamed_feature, str_removeprefix
+from vk_physical_device_features_gen import get_renamed_feature
 import os
 import sys
 import xml.etree.ElementTree as et
@@ -71,13 +71,13 @@ def process_enable(enab):
         else:
             return f"(p->{attrib['member']} & {attrib['value']})"
     elif 'extension' in attrib:
-        return f"e->{str_removeprefix(attrib['extension'], 'VK_')}"
+        return f"e->{attrib['extension'].removeprefix('VK_')}"
     elif 'feature' in attrib:
         feat = get_renamed_feature(attrib['struct'], attrib['feature'])
         return f"f->{feat}"
     else:
         version = attrib['version']
-        return f"(api_version >= VK_API_{str_removeprefix(version, 'VK_')})"
+        return f"(api_version >= VK_API_{version.removeprefix('VK_')})"
 
 def get_capabilities(doc, beta):
     caps = {}