view mercurial/bdiff.h @ 38997:812eec3f89cb

changegroup: remove _clnodetorev

cgpacker._clnodetorev is a glorified cache/index of changelog
nodes to revision numbers.

I'm not sure why it exists. Maybe performance? But its presence
is making refactoring of this code more complicated than it needs
to be.

This commit removes the cache and replaces it with direct lookups
against the changelog.

If this cache was for performance reasons, we should be able to
restore it easily enough... after the changegroup refactor is
complete.

Differential Revision: https://phab.mercurial-scm.org/D4189

#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