annotate mercurial/mpatch.h @ 46319:3dfebba99ef6

windows: wrap `os.getcwd()` in `os.path.realpath()` on py3

I noticed various `test-check-*` failures that were printing absolute paths
when repo relative paths were expected.  This was due to the drive letter in
`repo.root` being uppercased as it is run through `os.path.realpath()`, and then
the simple string comparison against the (lowercased) `_cwd` member of dirstate
in `dirstate.getcwd()` causing an absolute path to be returned, instead of the
expected `b''`.  That in turn causes `scmutil.getuipathfn()` to wrongly use
`repo.pathto()` with an absolute cwd path.
.

Differential Revision: https://phab.mercurial-scm.org/D9806

#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