mercurial/mpatch.h

wrapcommand: use functools.partial

Like the previous patch, this helps remove noises in traceback.

Practically, this removes another 6 lines in `rebase -s . -d .` traceback in
my setup:

   ....
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
  -File "hg/mercurial/extensions.py", line 331, in closure
  -  return func(*(args + a), **kw)
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
   File "fb-hgext/hgext3rd/fbhistedit.py", line 283, in _rebase
     return orig(ui, repo, **opts)
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
  -File "hg/mercurial/extensions.py", line 331, in closure
  -  return func(*(args + a), **kw)
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
   File "remotenames.py", line 633, in exrebasecmd
     ret = orig(ui, repo, **opts)
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
  -File "hg/mercurial/extensions.py", line 331, in closure
  -  return func(*(args + a), **kw)
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
   File "fb-hgext/hgext3rd/fbamend/__init__.py", line 453, in wraprebase
     return orig(ui, repo, **opts)
   File "hg/mercurial/util.py", line 1118, in check
     return func(*args, **kwargs)
   ....

Differential Revision: https://phab.mercurial-scm.org/D633

#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