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// 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_
#pragma once
#include <string>
#include "base/base_api.h"
#include "build/build_config.h"
namespace base {
namespace env_vars {
#if defined(OS_POSIX)
extern const char kHome[];
#endif
} // namespace env_vars
class BASE_API Environment {
public:
virtual ~Environment();
// Static factory method that returns the implementation that provide the
// appropriate platform-specific instance.
static Environment* Create();
// Gets an environment variable's value and stores it in |result|.
// Returns false if the key is unset.
virtual bool GetVar(const char* variable_name, std::string* result) = 0;
// Syntactic sugar for GetVar(variable_name, NULL);
virtual bool HasVar(const char* variable_name);
// Returns true on success, otherwise returns false.
virtual bool SetVar(const char* variable_name,
const std::string& new_value) = 0;
// Returns true on success, otherwise returns false.
virtual bool UnSetVar(const char* variable_name) = 0;
};
} // namespace base
#endif // BASE_ENVIRONMENT_H_
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