49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_ENVIRONMENT_H_
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#define BASE_ENVIRONMENT_H_
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#include <string>
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#include "base/base_export.h"
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#include "build/build_config.h"
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namespace base {
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namespace env_vars {
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#if defined(OS_POSIX)
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BASE_EXPORT extern const char kHome[];
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#endif
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} // namespace env_vars
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class BASE_EXPORT Environment {
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public:
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virtual ~Environment();
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// Static factory method that returns the implementation that provide the
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// appropriate platform-specific instance.
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static Environment* Create();
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// Gets an environment variable's value and stores it in |result|.
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// Returns false if the key is unset.
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virtual bool GetVar(const char* variable_name, std::string* result) = 0;
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// Syntactic sugar for GetVar(variable_name, NULL);
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virtual bool HasVar(const char* variable_name);
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// Returns true on success, otherwise returns false.
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virtual bool SetVar(const char* variable_name,
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const std::string& new_value) = 0;
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// Returns true on success, otherwise returns false.
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virtual bool UnSetVar(const char* variable_name) = 0;
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};
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} // namespace base
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#endif // BASE_ENVIRONMENT_H_
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