view mercurial/mpatch.h @ 36238:f574cc00831a

node: make bin() be a wrapper instead of just an alias

This includes a full backout of 59affe7e and 30d0cb27. Per the review
of the former, we'd rather adapt the API to behave like it used to (at
least for now), and take a second run at it if it shows up in our
performance numbers. I ran perfrevlogindex with and without this
change and it didn't make a measurable difference, so maybe it's fine
(despite my intuition to the contrary).

Differential Revision: https://phab.mercurial-scm.org/D2279

#ifndef _HG_MPATCH_H_
#define _HG_MPATCH_H_

#define MPATCH_ERR_NO_MEM -3
#define MPATCH_ERR_CANNOT_BE_DECODED -2
#define MPATCH_ERR_INVALID_PATCH -1

struct mpatch_frag {
	int start, end, len;
	const char *data;
};

struct mpatch_flist {
	struct mpatch_frag *base, *head, *tail;
};

int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist **res);
ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l);
void mpatch_lfree(struct mpatch_flist *a);
int mpatch_apply(char *buf, const char *orig, ssize_t len,
                 struct mpatch_flist *l);
struct mpatch_flist *
mpatch_fold(void *bins, struct mpatch_flist *(*get_next_item)(void *, ssize_t),
            ssize_t start, ssize_t end);

#endif