mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 00:06:09 +03:00
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
// 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/string16.h"
|
|
#include "base/strings/string_piece.h"
|
|
#include "build/build_config.h"
|
|
|
|
namespace base {
|
|
|
|
namespace env_vars {
|
|
|
|
#if defined(OS_POSIX)
|
|
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.
|
|
virtual bool SetVar(StringPiece variable_name,
|
|
const std::string& new_value) = 0;
|
|
|
|
// Returns true on success, otherwise returns false.
|
|
virtual bool UnSetVar(StringPiece variable_name) = 0;
|
|
};
|
|
|
|
|
|
#if defined(OS_WIN)
|
|
|
|
typedef string16 NativeEnvironmentString;
|
|
typedef std::map<NativeEnvironmentString, NativeEnvironmentString>
|
|
EnvironmentMap;
|
|
|
|
// Returns a modified environment vector constructed from the given environment
|
|
// and the list of changes given in |changes|. Each key in the environment is
|
|
// matched against the first element of the pairs. In the event of a match, the
|
|
// value is replaced by the second of the pair, unless the second is empty, in
|
|
// which case the key-value is removed.
|
|
//
|
|
// This Windows version takes and returns a Windows-style environment block
|
|
// which is a concatenated list of null-terminated 16-bit strings. The end is
|
|
// marked by a double-null terminator. The size of the returned string will
|
|
// include the terminators.
|
|
BASE_EXPORT string16 AlterEnvironment(const wchar_t* env,
|
|
const EnvironmentMap& changes);
|
|
|
|
#elif defined(OS_POSIX)
|
|
|
|
typedef std::string NativeEnvironmentString;
|
|
typedef std::map<NativeEnvironmentString, NativeEnvironmentString>
|
|
EnvironmentMap;
|
|
|
|
// See general comments for the Windows version above.
|
|
//
|
|
// This Posix version takes and returns a Posix-style environment block, which
|
|
// is a null-terminated list of pointers to null-terminated strings. The
|
|
// returned array will have appended to it the storage for the array itself so
|
|
// there is only one pointer to manage, but this means that you can't copy the
|
|
// array without keeping the original around.
|
|
BASE_EXPORT std::unique_ptr<char* []> AlterEnvironment(
|
|
const char* const* env,
|
|
const EnvironmentMap& changes);
|
|
|
|
#endif
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_ENVIRONMENT_H_
|