style: run clang-format

Take the format file from libSDL. It's not ideal, but at least it's
consistent.

Author: mardy

.clang-format

@@ -0,0 +1,90 @@
+---
+AlignConsecutiveMacros: Consecutive
+AlignConsecutiveAssignments: None
+AlignConsecutiveBitFields: None
+AlignConsecutiveDeclarations: None
+AlignEscapedNewlines: Right
+AlignOperands: Align
+AlignTrailingComments: true
+
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortEnumsOnASingleLine: true
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLoopsOnASingleLine: false
+
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: MultiLine
+
+# Custom brace breaking
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: true
+  AfterClass: true
+  AfterControlStatement: Never
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterObjCDeclaration: true
+  AfterStruct: true
+  AfterUnion: true
+  AfterExternBlock: false
+  BeforeElse: false
+  BeforeWhile: false
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+
+# Make the closing brace of container literals go to a new line
+Cpp11BracedListStyle: false
+
+# Never format includes
+IncludeBlocks: Preserve
+# clang-format version 4.0 through 12.0:
+#SortIncludes: false
+# clang-format version 13.0+:
+#SortIncludes: Never
+
+# No length limit, in case it breaks macros, you can
+# disable it with /* clang-format off/on */ comments
+ColumnLimit: 0
+
+IndentWidth: 4
+ContinuationIndentWidth: 4
+IndentCaseLabels: false
+IndentCaseBlocks: false
+IndentGotoLabels: true
+IndentPPDirectives: None
+IndentExternBlock: NoIndent
+
+PointerAlignment: Right
+SpaceAfterCStyleCast: false
+SpacesInCStyleCastParentheses: false
+SpacesInConditionalStatement: false
+SpacesInContainerLiterals: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCaseColon: false
+SpaceBeforeParens: ControlStatements
+SpaceAroundPointerQualifiers: Default
+SpaceInEmptyBlock: false
+SpaceInEmptyParentheses: false
+
+UseCRLF: false
+UseTab: Never
+
+ForEachMacros:
+  [
+    "spa_list_for_each",
+    "spa_list_for_each_safe",
+    "wl_list_for_each",
+    "wl_array_for_each",
+    "udev_list_entry_foreach",
+  ]
+
+---
+