clang-format: update rules

Update clang-format rules to the linux kernel coding style, with some
exceptions

.clang-format

@@ -1,35 +1,136 @@
+# Clang format taken from https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/.clang-format?id=b9a10f876409bf3768178f4aded199e193ddbe33
+# Patched with:
+#  - .*indentwidth: 4
+#  - IndentCaseLabels: true
+#  - removal of "ForEachMacros" that are irrevelant to this project
+#  - AlignConsecutiveBitFields: true
+#  - AlignOperands: AlignAfterOperator
+#  - AlignTrailingComments:
+#      Kind: Always
+#      OverEmptyLines: 1
+#  - Standard: c++14
+# Original header below
+##########################################################################
+# SPDX-License-Identifier: GPL-2.0
+#
+# clang-format configuration file. Intended for clang-format >= 11.
+#
+# For more information, see:
+#
+#   Documentation/dev-tools/clang-format.rst
+#   https://clang.llvm.org/docs/ClangFormat.html
+#   https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+#
 ---
-BasedOnStyle: Google
+AccessModifierOffset: -4
-AlignConsecutiveBitFields: AcrossEmptyLinesAndComments
+AlignAfterOpenBracket: Align
-AlignTrailingComments: 'true'
+AlignConsecutiveAssignments: false
-AlignConsecutiveAssignments: Consecutive
+AlignConsecutiveDeclarations: false
-AllowShortFunctionsOnASingleLine: 'false'
+AlignEscapedNewlines: Left
-ColumnLimit: '80'
+AlignConsecutiveBitFields: true
-DerivePointerAlignment: 'false'
+AlignOperands: AlignAfterOperator
-IndentExternBlock: NoIndent
+AlignTrailingComments:
-IndentWidth: '4'
+  Kind: Always
-NamespaceIndentation: Inner
+  OverEmptyLines: 1
-
+AllowAllParametersOfDeclarationOnNextLine: false
-BinPackParameters: 'false'
+AllowShortBlocksOnASingleLine: false
-BreakBeforeBraces: Custom
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: true
+BinPackParameters: true
 BraceWrapping:
-  AfterCaseLabel:  'true'
+  AfterClass: false
-  AfterClass:      'true'
+  AfterControlStatement: false
-  AfterControlStatement: Always
+  AfterEnum: false
-  AfterEnum:       'true'
+  AfterFunction: true
-  AfterFunction:   'true'
+  AfterNamespace: true
-  AfterNamespace:  'true'
+  AfterObjCDeclaration: false
-  AfterObjCDeclaration: 'true'
+  AfterStruct: false
-  AfterStruct:     'true'
+  AfterUnion: false
-  AfterUnion:      'true'
+  AfterExternBlock: false
-  AfterExternBlock: 'false'
+  BeforeCatch: false
-  BeforeCatch:     'true'
+  BeforeElse: false
-  BeforeElse:      'true'
+  IndentBraces: false
-  BeforeLambdaBody: 'true'
+  SplitEmptyFunction: true
-  BeforeWhile:     'false'
+  SplitEmptyRecord: true
-  IndentBraces:    'false'
+  SplitEmptyNamespace: true
-  SplitEmptyFunction: 'true'
+BreakBeforeBinaryOperators: None
-  SplitEmptyRecord: 'true'
+BreakBeforeBraces: Custom
-  SplitEmptyNamespace: 'true'
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: false
+BreakConstructorInitializersBeforeComma: false
+BreakConstructorInitializers: BeforeComma
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: false
+ColumnLimit: 80
+CommentPragmas: '^ IWYU pragma:'
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: false
+DerivePointerAlignment: false
+DisableFormat: false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: false
 
+
+IncludeBlocks: Preserve
+IncludeCategories:
+  - Regex: '.*'
+    Priority: 1
+IncludeIsMainRegex: '(Test)?$'
+IndentCaseLabels: true
+IndentGotoLabels: false
+IndentPPDirectives: None
+IndentWidth: 4
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBinPackProtocolList: Auto
+ObjCBlockIndentWidth: 4
+ObjCSpaceAfterProperty: true
+ObjCSpaceBeforeProtocolList: true
+
+# Taken from git's rules
+PenaltyBreakAssignment: 10
+PenaltyBreakBeforeFirstCallParameter: 30
+PenaltyBreakComment: 10
+PenaltyBreakFirstLessLess: 0
+PenaltyBreakString: 10
+PenaltyExcessCharacter: 100
+PenaltyReturnTypeOnItsOwnLine: 60
+
+PointerAlignment: Right
+ReflowComments: false
+SortIncludes: false
+SortUsingDeclarations: false
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatementsExceptForEachMacros
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInContainerLiterals: false
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: c++14
+TabWidth: 4
+UseTab: Never
 ...