mercurial/bdiff.h

copies: no longer change the sidedata flag

With the new sidedata storage that include data about all file changes, every
revision has one, so the sidedata flag is not longer a good way to spot
changeset with copy information. So we drop this check to simplify the code

We optimisation itself provided an interesting speedup, so we will likely
reintroduce something similar, with a dedicated flag, in the future.

Differential Revision: https://phab.mercurial-scm.org/D9116

#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