# HG changeset patch
# User Boris Feld <boris.f...@octobus.net>
# Date 1541785396 -3600
# Fri Nov 09 18:43:16 2018 +0100
# Node ID 036a7425b869b5b8e3e7f528ed6d992c48ebb52e
# Parent ef4813b8b4911e5a73309b41f1f7496983792b64
# EXP-Topic sparse-perf
# Available At https://bitbucket.org/octobus/mercurial-devel/
# hg pull https://bitbucket.org/octobus/mercurial-devel/ -r
036a7425b869
sparse-revlog: add a `index_segment_span` 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
@@ -1010,6 +1010,14 @@ bail:
return NULL;
}
+static inline long index_segment_span(indexObject *self, Py_ssize_t start_rev,
+ Py_ssize_t end_rev)
+{
+ return (index_get_start(self, end_rev) -
+ index_get_start(self, start_rev) +
+ index_get_length(self, end_rev));
+}
+
static inline int nt_level(const char *node, Py_ssize_t level)
{
int v = node[level >> 1];
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