| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_ENVIRONMENT_H_ |
| #define BASE_ENVIRONMENT_H_ |
| |
| #include <map> |
| #include <memory> |
| #include <string> |
| |
| #include "base/base_export.h" |
| #include "base/strings/string_piece.h" |
| #include "build/build_config.h" |
| |
| namespace base { |
| |
| namespace env_vars { |
| |
| #if defined(OS_POSIX) || defined(OS_FUCHSIA) |
| BASE_EXPORT extern const char kHome[]; |
| #endif |
| |
| } // namespace env_vars |
| |
| class BASE_EXPORT Environment { |
| public: |
| virtual ~Environment(); |
| |
| // Returns the appropriate platform-specific instance. |
| static std::unique_ptr<Environment> Create(); |
| |
| // Gets an environment variable's value and stores it in |result|. |
| // Returns false if the key is unset. |
| virtual bool GetVar(StringPiece variable_name, std::string* result) = 0; |
| |
| // Syntactic sugar for GetVar(variable_name, nullptr); |
| virtual bool HasVar(StringPiece variable_name); |
| |
| // Returns true on success, otherwise returns false. This method should not |
| // be called in a multi-threaded process. |
| virtual bool SetVar(StringPiece variable_name, |
| const std::string& new_value) = 0; |
| |
| // Returns true on success, otherwise returns false. This method should not |
| // be called in a multi-threaded process. |
| virtual bool UnSetVar(StringPiece variable_name) = 0; |
| }; |
| |
| #if defined(OS_WIN) |
| using NativeEnvironmentString = std::wstring; |
| #elif defined(OS_POSIX) || defined(OS_FUCHSIA) |
| using NativeEnvironmentString = std::string; |
| #endif |
| using EnvironmentMap = |
| std::map<NativeEnvironmentString, NativeEnvironmentString>; |
| |
| } // namespace base |
| |
| #endif // BASE_ENVIRONMENT_H_ |