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When connect_through_blocks() was called on blocks within a single
chain, there was a bug where the chain was incorrectly cropped. In
a standard FPGA image, say one was to use this API call to connect the
radio to the DDC. It would generate a chain of blocks hanging off the
radio as such:
Radio -> DDC -> SEP
What the code should do, and what this fix provides, is that the chain
gets cropped after the DDC, to look like this:
Radio -> DDC
With the current bug, it would assume the chain has a dangling edge, and
incorrectly throw an exception.
Note that this bug would not appear when source and destination block
are on separate chains (i.e., both have an SEP in their chain).
This patch includes minor logging and comment improvements around the
offending lines of code.
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It could be possible that we only find one SEP connected edge, which
should be invalid.
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The conditional setting of some variables lead the compiler to assume
they might be used uninitialized. Circumventing compiler warning by
initializing variables to a default value, even if that's not the right
value (they will get set later).
Also applied clang-format to the same code section.
This fixes da1aeaeccc.
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Calling on connect with SEPs in the path is not supported. This change
enables connect_through_blocks to find SEPs in the connection chain
and link the src and dest blocks directly.
Signed-off-by: Steven Koo <steven.koo@ni.com>
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Adding graph_utils to keep rfnoc_graph utilities to contain helper
function and commonly used algorithms for the rfnoc_graph. These
functions aren't core to the rfnoc_graph's functionality, so we'll keep
them out of its API.
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