view mercurial/bdiff.h @ 42411:4738c292a520

narrowspec: replace one recursion-avoidance hack with another

When updating the working copy narrowspec, we call context.walk() in
order to find which files to update the working copy
with. context.walk() calls repo.narrowmatch(). In order to avoid
infinite recursion in this case, we have a hack that assigns the new
values for repo.narrowpats and repo._narrowmatch. However, doing that
of course breaks future invalidation of those properties (they're
@storecache'd). Let's instead avoid the infinite recursion by setting
a flag on the repo instance when we're updating the working copy.

Differential Revision: https://phab.mercurial-scm.org/D6468

#ifndef _HG_BDIFF_H_
#define _HG_BDIFF_H_

#include "compat.h"

struct bdiff_line {
	int hash, n, e;
	ssize_t len;
	const char *l;
};

struct bdiff_hunk;
struct bdiff_hunk {
	int a1, a2, b1, b2;
	struct bdiff_hunk *next;
};

int bdiff_splitlines(const char *a, ssize_t len, struct bdiff_line **lr);
int bdiff_diff(struct bdiff_line *a, int an, struct bdiff_line *b, int bn,
               struct bdiff_hunk *base);
void bdiff_freehunks(struct bdiff_hunk *l);

#endif