53 lines
2.2 KiB
C++
53 lines
2.2 KiB
C++
// Copyright 2019 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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// This file contains internal routines that are called by other files in
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// base/process/.
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#ifndef BASE_PROCESS_ENVIRONMENT_INTERNAL_H_
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#define BASE_PROCESS_ENVIRONMENT_INTERNAL_H_
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#include <memory>
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#include "base/environment.h"
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#include "build/build_config.h"
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namespace base {
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namespace internal {
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#if defined(OS_POSIX) || defined(OS_FUCHSIA)
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// Returns a modified environment vector constructed from the given environment
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// and the list of changes given in |changes|. Each key in the environment is
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// matched against the first element of the pairs. In the event of a match, the
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// value is replaced by the second of the pair, unless the second is empty, in
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// which case the key-value is removed.
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//
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// This POSIX version takes and returns a POSIX-style environment block, which
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// is a null-terminated list of pointers to null-terminated strings. The
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// returned array will have appended to it the storage for the array itself so
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// there is only one pointer to manage, but this means that you can't copy the
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// array without keeping the original around.
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BASE_EXPORT std::unique_ptr<char*[]> AlterEnvironment(
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const char* const* env,
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const EnvironmentMap& changes);
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#elif defined(OS_WIN)
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// Returns a modified environment vector constructed from the given environment
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// and the list of changes given in |changes|. Each key in the environment is
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// matched against the first element of the pairs. In the event of a match, the
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// value is replaced by the second of the pair, unless the second is empty, in
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// which case the key-value is removed.
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//
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// This Windows version takes and returns a Windows-style environment block,
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// which is a string containing several null-terminated strings followed by an
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// extra terminating null character. So, e.g., the environment A=1 B=2 is
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// represented as L"A=1\0B=2\0\0".
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BASE_EXPORT NativeEnvironmentString
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AlterEnvironment(const wchar_t* env, const EnvironmentMap& changes);
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#endif // OS_*
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} // namespace internal
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} // namespace base
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#endif // BASE_PROCESS_ENVIRONMENT_INTERNAL_H_
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