On Wed, Aug 03, 2016 at 05:12:21PM -0400, Jeff King wrote:
> The alternative is to hand-code it, which is what send_sideband() does
> (it uses xsnprintf("%04x") to do the hex formatting, though).
After seeing that, I wondered why we need set_packet_header() at all.
But we do for the case when we are filling in the size at the start of a
buffer, because xsnprintf() will write an extra NUL that we do not care
about. send_sideband() is happy to then overwrite it with data, but
code (like format_packet) that computes the buffer, then fills in the
size, must avoid overwriting the first byte of the buffer.
-Peff
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