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The KCM responder reads bytes and writes bytes from a buffer of bytes.
Instead of letting the caller deal with low-level handling using the
SAFEALIGN macros, this patch adds a new iobuf.c module with more
high-level functions.
The core is a iobuf struct that keeps track of the buffer, its total
capacity and a current read or write position.
There are helper function to read or write a generic buffer with a set
length. Later, we will also add convenience functions to read C data
types using the SAFEALIGN macros.
Reviewed-by: Pavel Březina <pbrezina@redhat.com>
Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>
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