I was looking at these the other day and left scratching my head, I saw
them in the "lookup" unit test for codec but TBH I'm really none the
wiser, except to note that the test fails if I don't use them :-).
TBH codec could do with some API documentation, to be fair many of the
methods are fairly obvious, but there are a few less obvious ones.
I also came across quite a subtle difference between codec and message:
PN_EXTERN ssize_t pn_data_encode(pn_data_t *data, char *bytes, size_t size);
PN_EXTERN int pn_message_encode(pn_message_t *msg, char *bytes, size_t
*size);
The former return the actual size but the latter returns an error code
with the size updated in a reference parameter. That's a fairly easy one
to miss.
Frase
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