annotate mercurial/bdiff.h @ 49888:445b4d819e9a

pathauditor: no need to normcase the paths

The only thing normed paths are used is the key of the caching sets,
so the only change of behavior will be that the checks will be repeated
for paths that differ by case.

If anything, it seems correct for the check to be repeated, in case
that actually affects semantics, but the main reasoning is simplifying
the code and making it a bit faster.

It looks like the code originally comes from commit [081e795c60e0]:
it looks like that commit tried to get rid of the existing norming,
but presumably did this overly cautiously, preserving it for the
cache keys, even though it was pointless even then.

#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