// 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 #include #include #include "base/base_export.h" #include "base/strings/string_piece.h" #include "build/build_config.h" namespace base { namespace env_vars { #if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_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 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 BUILDFLAG(IS_WIN) using NativeEnvironmentString = std::wstring; #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA) using NativeEnvironmentString = std::string; #endif using EnvironmentMap = std::map; } // namespace base #endif // BASE_ENVIRONMENT_H_