Mercurial > hg
diff mercurial/cext/revlog.c @ 41085:a6556b09bf83
revlog: add a native implementation of issnapshot
This will be used in the next changesets
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Mon, 17 Dec 2018 10:57:13 +0100 |
parents | 46e0563c67db |
children | a28833d79aca |
line wrap: on
line diff
--- a/mercurial/cext/revlog.c Mon Dec 17 10:51:36 2018 +0100 +++ b/mercurial/cext/revlog.c Mon Dec 17 10:57:13 2018 +0100 @@ -995,6 +995,40 @@ return result; } +/** + * Find if a revision is a snapshot or not + * + * Only relevant for sparse-revlog case. + * Callers must ensure that rev is in a valid range. + */ +static int index_issnapshotrev(indexObject *self, Py_ssize_t rev) +{ + int ps[2]; + Py_ssize_t base; + while (rev >= 0) { + base = (Py_ssize_t)index_baserev(self, rev); + if (base == rev) { + base = -1; + } + if (base == -2) { + assert(PyErr_Occurred()); + return -1; + } + if (base == -1) { + return 1; + } + if (index_get_parents(self, rev, ps, (int)rev) < 0) { + assert(PyErr_Occurred()); + return -1; + }; + if (base == ps[0] || base == ps[1]) { + return 0; + } + rev = base; + } + return rev == -1; +} + static PyObject *index_deltachain(indexObject *self, PyObject *args) { int rev, generaldelta;