59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
#ifndef FETCH_NEGOTIATOR_H
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#define FETCH_NEGOTIATOR_H
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struct commit;
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/*
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* An object that supplies the information needed to negotiate the contents of
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* the to-be-sent packfile during a fetch.
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*
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* To set up the negotiator, call fetch_negotiator_init(), then known_common()
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* (0 or more times), then add_tip() (0 or more times).
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*
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* Then, when "have" lines are required, call next(). Call ack() to report what
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* the server tells us.
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*
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* Once negotiation is done, call release(). The negotiator then cannot be used
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* (unless reinitialized with fetch_negotiator_init()).
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*/
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struct fetch_negotiator {
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/*
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* Before negotiation starts, indicate that the server is known to have
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* this commit.
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*/
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void (*known_common)(struct fetch_negotiator *, struct commit *);
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/*
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* Once this function is invoked, known_common() cannot be invoked any
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* more.
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*
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* Indicate that this commit and all its ancestors are to be checked
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* for commonality with the server.
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*/
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void (*add_tip)(struct fetch_negotiator *, struct commit *);
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/*
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* Once this function is invoked, known_common() and add_tip() cannot
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* be invoked any more.
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*
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* Return the next commit that the client should send as a "have" line.
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*/
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const struct object_id *(*next)(struct fetch_negotiator *);
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/*
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* Inform the negotiator that the server has the given commit. This
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* method must only be called on commits returned by next().
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*/
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int (*ack)(struct fetch_negotiator *, struct commit *);
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void (*release)(struct fetch_negotiator *);
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/* internal use */
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void *data;
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};
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void fetch_negotiator_init(struct fetch_negotiator *negotiator,
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const char *algorithm);
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#endif
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