view mercurial/bdiff.h @ 38937:f7d8fb2ed8a8

index: remove side-effect from failed nt_init()

As pointed out by Yuya in the review of D4108, if we run into the
"overflow in nt_init" case (which I think normally happens only in
repos with at least 2^26=64Mi revisions), we would leave the node tree
half-initialized.

Differential Revision: https://phab.mercurial-scm.org/D4153

#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