annotate mercurial/bdiff.h @ 31864:70d163b86316

upgrade: extract code in its own module

Given about 2/3 or 'mercurial.repair' is now about repository upgrade, I think
it is fair to move it into its own module.

An expected benefit is the ability to drop the 'upgrade' prefix of many
functions. This will be done in coming changesets.

#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