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authorJeff King <peff@peff.net>2012-08-14 01:59:27 (GMT)
committerJunio C Hamano <gitster@pobox.com>2012-08-14 04:52:36 (GMT)
commit9442710801b0b7b9aeefe60408d1835af138cfcc (patch)
tree3c4607b55efcc78035c7beb5091aa28dcd9af860 /builtin
parent74991a98df79ff3702dcb3b5c22c7b9ec20cfead (diff)
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parse_feature_request: make it easier to see feature values
We already take care to parse key/value capabilities like "foo=bar", but the code does not provide a good way of actually finding out what is on the right-hand side of the "=". A server using "parse_feature_request" could accomplish this with some extra parsing. You must skip past the "key" portion manually, check for "=" versus NUL or space, and then find the length by searching for the next space (or NUL). But clients can't even do that, since the "server_supports" interface does not even return the pointer. Instead, let's have our parser share more information by providing a pointer to the value and its length. The "parse_feature_value" function returns a pointer to the feature's value portion, along with the length of the value. If the feature is missing, NULL is returned. If it does not have an "=", then a zero-length value is returned. Similarly, "server_feature_value" behaves in the same way, but always checks the static server_feature_list variable. We can then implement "server_supports" in terms of "server_feature_value". We cannot implement the original "parse_feature_request" in terms of our new function, because it returned a pointer to the beginning of the feature. However, no callers actually cared about the value of the returned pointer, so we can simplify it to a boolean just as we do for "server_supports". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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