# HG changeset patch
# User Boris Feld <boris.f...@octobus.net>
# Date 1541785378 -3600
# Fri Nov 09 18:42:58 2018 +0100
# Node ID ef4813b8b4911e5a73309b41f1f7496983792b64
# Parent 524f8117280d1a36301653c463f969fbc2391a7c
# EXP-Topic sparse-perf
# Available At https://bitbucket.org/octobus/mercurial-devel/
# hg pull https://bitbucket.org/octobus/mercurial-devel/ -r
ef4813b8b491
sparse-revlog: add a `index_get_length` function in C
We are about to implement a native version of `slicechunktodensity`. For
clarity, we introduce the helper functions first. This new function provides
an efficient way to retrieve some of the information needed by
`slicechunktodensity`.
diff --git a/mercurial/cext/revlog.c b/mercurial/cext/revlog.c
--- a/mercurial/cext/revlog.c
+++ b/mercurial/cext/revlog.c
@@ -200,6 +200,18 @@ static inline uint64_t index_get_start(i
return offset;
}
+static inline int index_get_length(indexObject *self, Py_ssize_t rev)
+{
+ if (rev >= self->length) {
+ PyObject *tuple =
+ PyList_GET_ITEM(self->added, rev - self->length);
+ return (int)PyInt_AS_LONG(PyTuple_GET_ITEM(tuple, 1));
+ } else {
+ const char *data = index_deref(self, rev);
+ return getbe32(data + 8);
+ }
+}
+
/*
* RevlogNG format (all in big endian, data may be inlined):
* 6 bytes: offset
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