mercurial/cffi/mpatchbuild.py

context: move handling of filtering error to revsymbol() (API)

When changectx's constructor runs into various Filtered*Error, it
creates an exception with a hint about using --hidden. This only makes
sense when the revision was provided by the user (if we get e.g. a
FilteredLookupError from repo[p1], then it's instead a programming
error). Thus, I'm moving the handling into revsymbol(). Also changed
"unfilteredrepo[changeid]" to "revsymbol(unfilteredrepo, changeid)" as
part of the move.

Differential Revision: https://phab.mercurial-scm.org/D3143

from __future__ import absolute_import

import cffi
import os

ffi = cffi.FFI()
mpatch_c = os.path.join(os.path.join(os.path.dirname(__file__), '..',
                                     'mpatch.c'))
with open(mpatch_c) as f:
    ffi.set_source("mercurial.cffi._mpatch", f.read(),
                   include_dirs=["mercurial"])
ffi.cdef("""

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

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

extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t);

int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res);
ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l);
void mpatch_lfree(struct mpatch_flist *a);
static int mpatch_apply(char *buf, const char *orig, size_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);
""")

if __name__ == '__main__':
    ffi.compile()