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