MAINT: Added clang-format support

The used .clang-format file has been generated using clang-format 6
(shipped with Ubuntu 18.04) and is therefore backwards compatible with
all clang-format versions until v6.

.clang-format

@@ -0,0 +1,86 @@
+---
+Language:        Cpp
+AccessModifierOffset: -4
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: true
+# Setting AlignConsecutiveDeclarations to true would be nice but it doesn't work right with PointerAlignment=Right
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Left
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: InlineOnly
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: true
+BinPackParameters: true
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeBraces: Attach
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakStringLiterals: true
+ColumnLimit:     120
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: false
+DerivePointerAlignment: false
+DisableFormat:   false
+FixNamespaceComments: true
+ForEachMacros:   
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IncludeBlocks:   Preserve
+IncludeCategories:
+    # Global.h must always be included last
+  - Regex: 'Global.h'
+    Priority: 10000
+    # Since a lot of windows-headers rely on windows.h, it has to be included first
+  - Regex: 'windows.h'
+    Priority: 1
+    # Assign a priority < INT_MAX to all other includes in order to be able to force headers
+    # to come after them
+  - Regex: '.*'
+    Priority: 10
+IndentCaseLabels: true
+IndentPPDirectives: AfterHash
+IndentWidth:     4
+IndentWrappedFunctionNames: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 3
+NamespaceIndentation: Inner
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Right
+ReflowComments:  true
+SortIncludes:    true
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: true
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  true
+SpacesInContainerLiterals: true
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        4
+UseTab:          ForContinuationAndIndentation
+...
+

scripts/runClangFormat.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+#
+# Copyright 2005-2020 The Mumble Developers. All rights reserved.
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file at the root of the
+# Mumble source tree or at <https://www.mumble.info/LICENSE>.
+
+currentDir=$(dirname $0)
+
+mainDir="$currentDir/.."
+
+cd "$mainDir"
+
+find -type f \( -iname "*.cpp" -o -iname "*.c" -o -iname "*.hpp" -o -iname "*.h" -o -iname "*.cxx" -o -iname "*.cc" \) \
+	-a -not -ipath "./3rdparty/*" -a -not -path "./.git/*" -a -not -ipath "./build/*" \
+	| xargs clang-format --style=file -i

src/mumble/TextToSpeech_win.cpp

@@ -5,8 +5,11 @@
 
 #include "TextToSpeech.h"
 
+// As the include order seems to make a difference, disable clang-format for them
+// clang-format off
 #include <servprov.h>
 #include <sapi.h>
+// clang-format on
 
 #undef FAILED
 #define FAILED(Status) (static_cast<HRESULT>(Status)<0)