view mercurial/bdiff.h @ 39069:4c4825db29e1

shortest: don't include nullid in disambigution revset

As noted by Yuya in the review of D4118, the fact that the nodetree
always contains the nullid is not what we want for the disambiguation
case. It's not what the pure version of the code does.

Note that the updated test also passes before this patch, but it
wouldn't have passed in native-code mode once we start using the
nodetree for disambiguating nodeid prefixes.

Differential Revision: https://phab.mercurial-scm.org/D4163

#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