diff --git a/src/.clang-format b/src/.clang-format
new file mode 100644
index 00000000..6f60f7bf
--- /dev/null
+++ b/src/.clang-format
@@ -0,0 +1,99 @@
+AccessModifierOffset: -4
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Right
+AlignOperands: true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: true
+BinPackParameters: true
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeBraces: Allman
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: false
+BreakConstructorInitializers: BeforeComma
+BreakAfterJavaFieldAnnotations: true
+BreakStringLiterals: true
+ColumnLimit: 160
+CommentPragmas: '^ IWYU pragma:'
+CompactNamespaces: true
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: false
+DerivePointerAlignment: false
+DisableFormat: false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: false
+IncludeBlocks: Preserve
+IncludeCategories: 
+  - Regex:           '^<ext/.*\.h>'
+    Priority:        2
+  - Regex:           '^<.*\.h>'
+    Priority:        1
+  - Regex:           '^<.*'
+    Priority:        2
+  - Regex:           '.*'
+    Priority:        3
+IncludeIsMainRegex: '([-_](test|unittest))?$'
+IndentCaseLabels: false
+IndentPPDirectives: None
+IndentWidth: 4
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Single
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: All
+ObjCBlockIndentWidth: 4
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Left
+ReflowComments: true
+SortIncludes: false
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInContainerLiterals: false
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: Cpp11
+TabWidth: 4
+UseTab: Never
+#...
+# unsupported rules
+#BreakInheritanceList: AfterColon
+#Language: None
+#ObjCBinPackProtocolList: Auto
+#PenaltyBreakTemplateDeclaration: 10
+#SpaceBeforeCpp11BracedList: false
+#SpaceBeforeCtorInitializerColon: true
+#SpaceBeforeInheritanceColon: true
+#SpaceBeforeRangeBasedForLoopColon: true
+
diff --git a/src/clang-format-all.sh b/src/clang-format-all.sh
new file mode 100644
index 00000000..943251ec
--- /dev/null
+++ b/src/clang-format-all.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+
+function usage {
+    echo "Usage: $0 DIR..."
+    exit 1
+}
+
+if [ $# -eq 0 ]; then
+    usage
+fi
+
+# Variable that will hold the name of the clang-format command
+FMT=""
+
+# Some distros just call it clang-format. Others (e.g. Ubuntu) are insistent
+# that the version number be part of the command. We prefer clang-format if
+# that's present, otherwise we work backwards from highest version to lowest
+# version.
+for clangfmt in clang-format{,-{4,3}.{9,8,7,6,5,4,3,2,1,0}}; do
+    if which "$clangfmt" &>/dev/null; then
+        FMT="$clangfmt"
+        break
+    fi
+done
+
+# Check if we found a working clang-format
+if [ -z "$FMT" ]; then
+    echo "failed to find clang-format"
+    exit 1
+fi
+
+# Check all of the arguments first to make sure they're all directories
+for dir in "$@"; do
+    if [ ! -d "${dir}" ]; then
+        echo "${dir} is not a directory"
+        usage
+    fi
+done
+
+# Find a dominating file, starting from a given directory and going up.
+find-dominating-file() {
+    if [ -r "$1"/"$2" ]; then
+        return 0
+    fi
+    if [ "$1" = "/" ]; then
+        return 1
+    fi
+    find-dominating-file "$(realpath "$1"/..)" "$2"
+    return $?
+}
+
+# Run clang-format -i on all of the things
+for dir in "$@"; do
+    pushd "${dir}" &>/dev/null
+    if ! find-dominating-file . .clang-format; then
+        echo "Failed to find dominating .clang-format starting at $PWD"
+        continue
+    fi
+    find . \
+         \( -name '*.c' \
+         -o -name '*.cc' \
+         -o -name '*.cpp' \
+         -o -name '*.h' \
+         -o -name '*.hh' \
+         -o -name '*.hpp' \) \
+         -exec "${FMT}" -i '{}' \;
+    popd &>/dev/null
+done