util/ForeignFifoBuffer: add method GetAvailable()
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@ -54,6 +54,7 @@ public:
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using ForeignFifoBuffer<T>::IsEmpty;
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using ForeignFifoBuffer<T>::IsFull;
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using ForeignFifoBuffer<T>::GetAvailable;
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using ForeignFifoBuffer<T>::Read;
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using ForeignFifoBuffer<T>::Consume;
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using ForeignFifoBuffer<T>::Write;
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@ -73,7 +74,7 @@ public:
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/* we already have enough space */
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return;
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const size_type in_use = Read().size;
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const size_type in_use = GetAvailable();
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const size_type required_capacity = in_use + n;
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size_type new_capacity = GetCapacity();
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do {
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@ -171,6 +171,10 @@ public:
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tail += n;
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}
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constexpr size_type GetAvailable() const {
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return tail - head;
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}
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/**
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* Return a buffer range which may be read. The buffer pointer is
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* writable, to allow modifications while parsing.
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