util/ConstBuffer: add method MoveFront()
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@ -246,6 +246,20 @@ struct ConstBuffer {
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data += n;
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data += n;
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size -= n;
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size -= n;
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}
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}
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/**
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* Move the front pointer to the given address, and adjust the
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* size attribute to retain the old end address.
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*/
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void MoveFront(pointer_type new_data) {
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#ifndef NDEBUG
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assert(IsNull() == (new_data == nullptr));
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assert(new_data <= end());
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#endif
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size = end() - new_data;
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data = new_data;
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}
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};
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};
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#endif
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#endif
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