1 //== Yaml.h ---------------------------------------------------- -*- C++ -*--=// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines convenience functions for handling YAML configuration files 10 // for checkers/packages. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H 15 #define LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H 16 17 #include "clang/StaticAnalyzer/Core/CheckerManager.h" 18 #include "llvm/Support/YAMLTraits.h" 19 20 namespace clang { 21 namespace ento { 22 23 /// Read the given file from the filesystem and parse it as a yaml file. The 24 /// template parameter must have a yaml MappingTraits. 25 /// Emit diagnostic error in case of any failure. 26 template <class T, class Checker> 27 llvm::Optional<T> getConfiguration(CheckerManager &Mgr, Checker *Chk, 28 StringRef Option, StringRef ConfigFile) { 29 if (ConfigFile.trim().empty()) 30 return None; 31 32 llvm::vfs::FileSystem *FS = llvm::vfs::getRealFileSystem().get(); 33 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer = 34 FS->getBufferForFile(ConfigFile.str()); 35 36 if (std::error_code ec = Buffer.getError()) { 37 Mgr.reportInvalidCheckerOptionValue(Chk, Option, 38 "a valid filename instead of '" + 39 std::string(ConfigFile) + "'"); 40 return None; 41 } 42 43 llvm::yaml::Input Input(Buffer.get()->getBuffer()); 44 T Config; 45 Input >> Config; 46 47 if (std::error_code ec = Input.error()) { 48 Mgr.reportInvalidCheckerOptionValue(Chk, Option, 49 "a valid yaml file: " + ec.message()); 50 return None; 51 } 52 53 return Config; 54 } 55 56 } // namespace ento 57 } // namespace clang 58 59 #endif // LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_MOVE_H 60