65 lines
2.7 KiB
C++
65 lines
2.7 KiB
C++
// Copyright 2018 The Chromium Authors
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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_FUCHSIA_MEM_BUFFER_UTIL_H_
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#define BASE_FUCHSIA_MEM_BUFFER_UTIL_H_
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#include <fuchsia/mem/cpp/fidl.h>
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#include <string>
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#include "base/base_export.h"
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#include "base/files/file.h"
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#include "base/strings/string_piece_forward.h"
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#include "third_party/abseil-cpp/absl/types/optional.h"
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namespace base {
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// Returns the contents of `buffer` (which must be a valid UTF-8 string), or
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// null in case of a conversion error.
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BASE_EXPORT absl::optional<std::u16string> ReadUTF8FromVMOAsUTF16(
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const fuchsia::mem::Buffer& buffer);
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// Creates a Fuchsia VMO from `data`. The size of the resulting virtual memory
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// object will be set to the size of the string, and it will be given the name
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// `name`.
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BASE_EXPORT zx::vmo VmoFromString(StringPiece data, StringPiece name);
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// Creates a Fuchsia memory buffer from `data`. The resulting virtual memory
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// object will be given the name `name`.
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// `fuchsia::mem::Buffer` is deprecated: for new interfaces, prefer using
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// a VMO object directly (see `VmoFromString`).
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BASE_EXPORT fuchsia::mem::Buffer MemBufferFromString(StringPiece data,
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StringPiece name);
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// Creates a Fuchsia memory buffer from the UTF-16 string `data`. The resulting
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// virtual memory object will be given the name `name`.
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BASE_EXPORT fuchsia::mem::Buffer MemBufferFromString16(StringPiece16 data,
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StringPiece name);
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// Returns the contents of `data`, or null if the read operation fails.
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BASE_EXPORT absl::optional<std::string> StringFromVmo(const zx::vmo& vmo);
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// Returns the contents of `buffer`, or null if the read operation fails.
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// `fuchsia::mem::Buffer` is deprecated: for new interfaces, prefer using
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// a VMO object directly (see `StringFromVmo`).
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BASE_EXPORT absl::optional<std::string> StringFromMemBuffer(
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const fuchsia::mem::Buffer& buffer);
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// Returns the contents of `data`, or null if the read operation fails.
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BASE_EXPORT absl::optional<std::string> StringFromMemData(
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const fuchsia::mem::Data& data);
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// Creates a memory-mapped, read-only Buffer with the contents of `file`. Will
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// return an empty Buffer if the file could not be opened.
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BASE_EXPORT fuchsia::mem::Buffer MemBufferFromFile(File file);
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// Creates a non-resizeable, copy-on-write shared memory clone of `buffer`. The
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// resulting virtual memory object will be given the name `name`.
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BASE_EXPORT fuchsia::mem::Buffer CloneBuffer(const fuchsia::mem::Buffer& buffer,
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StringPiece name);
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} // namespace base
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#endif // BASE_FUCHSIA_MEM_BUFFER_UTIL_H_
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