// Copyright 2022 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
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//    this software without specific prior written permission.
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#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "dawn/native/stream/BlobSource.h"

#include <utility>

namespace dawn::native::stream {

BlobSource::BlobSource(Blob&& blob) : mBlob(std::move(blob)) {}

ResultOrError<std::span<const std::byte>> BlobSource::Read(size_t bytes) {
    DAWN_INVALID_IF(bytes > mBlob.Size() - mOffset, "Out of bounds.");
    std::span<const std::byte> result = mBlob.Data().subspan(mOffset, bytes);
    mOffset += bytes;
    return result;
}

}  // namespace dawn::native::stream