Add pending RX api

src/can/iter.cpp

@@ -0,0 +1,95 @@
+#include <sta/can/iter.hpp>
+
+#include <sta/assert.hpp>
+
+
+namespace sta
+{
+	CanPendingRxFifos::const_iterator::const_iterator(uint32_t rxFlags, uint8_t idx, uint8_t endIdx)
+		: rxFlags_{rxFlags}, idx_{idx}, endIdx_{endIdx}
+	{}
+
+	CanPendingRxFifos::const_iterator::const_iterator(const const_iterator & iter)
+		: rxFlags_{iter.rxFlags_}, idx_{iter.idx_}, endIdx_{iter.endIdx_}
+	{}
+
+
+	CanPendingRxFifos::const_iterator & CanPendingRxFifos::const_iterator::operator=(const const_iterator & iter)
+	{
+		rxFlags_    = iter.rxFlags_;
+		idx_        = iter.idx_;
+		endIdx_     = iter.endIdx_;
+
+		return *this;
+	}
+
+
+	bool CanPendingRxFifos::const_iterator::operator==(const const_iterator & iter) const
+	{
+		return (rxFlags_ == iter.rxFlags_) && (idx_ == iter.idx_) && (endIdx_ == iter.endIdx_);
+	}
+
+	bool CanPendingRxFifos::const_iterator::operator!=(const const_iterator & iter) const
+	{
+		return !(*this == iter);
+	}
+
+
+	CanPendingRxFifos::const_iterator & CanPendingRxFifos::const_iterator::operator++()
+	{
+		while (idx_ < endIdx_)
+		{
+			++idx_;
+			if (isRxPending())
+			{
+				break;
+			}
+		}
+
+		return *this;
+	}
+
+	CanPendingRxFifos::const_iterator CanPendingRxFifos::const_iterator::operator++(int)
+	{
+		uint8_t oldIdx = idx_;
+
+		while (idx_ < endIdx_)
+		{
+			++idx_;
+			if (isRxPending())
+			{
+				break;
+			}
+		}
+
+		return const_iterator(rxFlags_, oldIdx, endIdx_);
+	}
+
+	CanPendingRxFifos::const_iterator::reference CanPendingRxFifos::const_iterator::operator*() const
+	{
+		STA_ASSERT_MSG(idx_ != endIdx_, "Dereferencing out-of-bounds iterator");
+
+		return idx_;
+	}
+
+	bool CanPendingRxFifos::const_iterator::isRxPending() const
+	{
+		return ( (rxFlags_ >> idx_) & 0x1 );
+	}
+
+
+
+	CanPendingRxFifos::CanPendingRxFifos(uint32_t rxFlags, uint8_t numFifos)
+		: rxFlags_{rxFlags}, numFifos_{numFifos}
+	{}
+
+	CanPendingRxFifos::const_iterator CanPendingRxFifos::begin() const
+	{
+		return const_iterator(rxFlags_, 0, numFifos_);
+	}
+
+	CanPendingRxFifos::const_iterator CanPendingRxFifos::end() const
+	{
+		return const_iterator(rxFlags_, numFifos_, numFifos_);
+	}
+} // namespace sta