Add clang-tidy support for the CDM

Bug: 256230932
Change-Id: Id3fcf024cd7dcf95218876b81359d6418f5aa067

.clang-tidy

@@ -0,0 +1,92 @@
+# Copyright 2023 Google LLC. All Rights Reserved. This file and proprietary
+# source code may only be used and distributed under the Widevine License
+# Agreement.
+
+Checks: >
+  -*,
+  bugprone-*,
+  -bugprone-branch-clone,
+  -bugprone-easily-swappable-parameters,
+  -bugprone-implicit-widening-of-multiplication-result,
+  -bugprone-integer-division,
+  -bugprone-macro-parentheses,
+  -bugprone-narrowing-conversions,
+  -bugprone-not-null-terminated-result,
+  -bugprone-sizeof-expression,
+  -bugprone-unhandled-self-assignment,
+  clang-analyzer-*,
+  -clang-analyzer-core.CallAndMessage,
+  -clang-analyzer-core.NullDereference,
+  -clang-analyzer-core.UndefinedBinaryOperatorResult,
+  -clang-analyzer-cplusplus.NewDelete,
+  -clang-analyzer-cplusplus.NewDeleteLeaks,
+  -clang-analyzer-optin.cplusplus.VirtualCall,
+  -clang-analyzer-optin.performance.Padding,
+  -clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling,
+  -clang-analyzer-valist.Uninitialized,
+  clang-diagnostic-*,
+  google-build-explicit-make-pair,
+  google-build-namespaces,
+  google-global-names-in-headers,
+  google-readability-namespace-comments,
+  google-runtime-operator,
+  misc-*,
+  -misc-no-recursion,
+  -misc-non-private-member-variables-in-classes,
+  -misc-redundant-expression,
+  -misc-unconventional-assign-operator,
+  -misc-unused-parameters,
+  modernize-avoid-bind,
+  modernize-concat-nested-namespaces,
+  modernize-deprecated-ios-base-aliases,
+  modernize-make-shared,
+  modernize-replace-auto-ptr,
+  modernize-replace-disallow-copy-and-assign-macro,
+  modernize-replace-random-shuffle,
+  modernize-shrink-to-fit,
+  modernize-unary-static-assert,
+  modernize-use-bool-literals,
+  modernize-use-nodiscard,
+  modernize-use-noexcept,
+  modernize-use-transparent-functors,
+  modernize-use-uncaught-exceptions,
+  performance-faster-string-find,
+  performance-implicit-conversion-in-loop,
+  performance-inefficient-algorithm,
+  performance-move-const-arg,
+  performance-move-constructor-init,
+  performance-trivially-destructible,
+  performance-type-promotion-in-math-fn,
+  performance-unnecessary-copy-initialization,
+  readability-avoid-const-params-in-decls,
+  readability-container-contains,
+  readability-delete-null-pointer,
+  readability-duplicate-include,
+  readability-identifier-naming,
+  readability-misleading-indentation,
+  readability-misplaced-array-index,
+  readability-redundant-access-specifiers,
+  readability-redundant-control-flow,
+  readability-redundant-function-ptr-dereference,
+  readability-redundant-preprocessor,
+  readability-redundant-smartptr-get,
+  readability-redundant-string-cstr,
+  readability-simplify-boolean-expr,
+  readability-simplify-subscript-expr,
+  readability-static-definition-in-anonymous-namespace,
+  readability-string-compare,
+  readability-uniqueptr-delete-release
+CheckOptions:
+- key: bugprone-reserved-identifier.AllowedIdentifiers
+  value: >
+    _;
+    __assert_fail;
+    __bswap_constant_16;
+    __bswap_constant_32;
+    __bswap_constant_64
+- key: bugprone-suspicious-string-compare.WarnOnLogicalNotComparison
+  value: true
+- key: bugprone-suspicious-string-compare.StringCompareLikeFunctions
+  value: crypto_memcmp
+WarningsAsErrors: '*'
+FormatStyle: file