view mercurial/mpatch.h @ 39464:3dd34b401bc2

merge: use vfs methods for I/O

All I/O is supposed to be performed via vfs instances so filesystems
can be abstracted. The previous commit ported the old code in purge,
which didn't go through the vfs layer. This commit ports the purge
code to use the vfs layer.

The vfs layer didn't have a method to remove a single directory, so
it was added as part of implementing this.

Differential Revision: https://phab.mercurial-scm.org/D4478

#ifndef _HG_MPATCH_H_
#define _HG_MPATCH_H_

#define MPATCH_ERR_NO_MEM -3
#define MPATCH_ERR_CANNOT_BE_DECODED -2
#define MPATCH_ERR_INVALID_PATCH -1

struct mpatch_frag {
	int start, end, len;
	const char *data;
};

struct mpatch_flist {
	struct mpatch_frag *base, *head, *tail;
};

int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist **res);
ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l);
void mpatch_lfree(struct mpatch_flist *a);
int mpatch_apply(char *buf, const char *orig, ssize_t len,
                 struct mpatch_flist *l);
struct mpatch_flist *
mpatch_fold(void *bins, struct mpatch_flist *(*get_next_item)(void *, ssize_t),
            ssize_t start, ssize_t end);

#endif