view mercurial/bdiff.h @ 42926:34ed651ba7e4

cleanup: fix leakage of dirstate._map to client code

We already had proper accessors for most of the behavior of
dirstate._map that callers cared about exposed in the actual dirstate
class as public methods. Sigh.

There are two remaining privacy violations in the codebase after this change:

 1) In the perf extension, which I suspect has to stick around because
    it's really testing the dirstate implementation directly

 2) In largefiles, where we deal with standins and mutating status. Looking at
    this, I _strongly_ suspect a formal dirstate interface would allow
    this to work via composition instead of inheritance and
    monkeypatching. Fortunately, such wins are a part of my motivation
    for this work. I anticipate we'll come back to this in due time.

Differential Revision: https://phab.mercurial-scm.org/D6837

#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