mercurial/bdiff.h

bundle2: move part iterator a separate class

Currently, the part iterator logic is tightly coupled with the part handling
logic, which means it's hard to replace the part handling logic without
duplicating the part iterator bits.

In a future diff we'll want to be able to replace all part handling, so let's
begin refactoring the part iterator logic to it's own class.

Differential Revision: https://phab.mercurial-scm.org/D703

#ifndef _HG_BDIFF_H_
#define _HG_BDIFF_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