[postgis-tickets] [SCM] PostGIS branch stable-3.1 updated. 3.1.6-31-gdfcc4326f

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The branch, stable-3.1 has been updated
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       via  c10f3bbe7e9627305f5af77bc6012c2c82503b8b (commit)
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- Log -----------------------------------------------------------------
commit dfcc4326f5ff39e2d45896b290043387ab2fcb45
Author: Paul Ramsey <pramsey at cleverelephant.ca>
Date:   Wed Aug 17 13:49:48 2022 -0700

    News entry for #5171

diff --git a/NEWS b/NEWS
index d5c54593c..cf4230749 100644
--- a/NEWS
+++ b/NEWS
@@ -9,7 +9,8 @@ PostGIS 3.1.7dev
   - #5202, Guard against downgrades (Sandro Santilli)
   - #5209, #5210, Fix upgrades with CVE-2022-2625 PostgreSQL fix
   - #5032, Correctly read extent off multi-key GIST indexes (Paul Ramsey)
-  - #5171, Reset proj error state after failed parse (Paul Ramsey)
+  - #5181, Reset proj error state after failed parse (Paul Ramsey)
+  - #5171, Short circuit geodesic distance when inputs equal (Paul Ramsey)
 
 
 PostGIS 3.1.6

commit c10f3bbe7e9627305f5af77bc6012c2c82503b8b
Author: Paul Ramsey <pramsey at cleverelephant.ca>
Date:   Wed Aug 17 13:45:41 2022 -0700

    Short circuit geodesic distance when input points are equal (References #5171)

diff --git a/liblwgeom/lwspheroid.c b/liblwgeom/lwspheroid.c
index 59368db42..bf8c5cbef 100644
--- a/liblwgeom/lwspheroid.c
+++ b/liblwgeom/lwspheroid.c
@@ -79,6 +79,11 @@ static double spheroid_big_b(double u2)
 double spheroid_distance(const GEOGRAPHIC_POINT *a, const GEOGRAPHIC_POINT *b, const SPHEROID *spheroid)
 {
 	struct geod_geodesic gd;
+
+	/* Same point => zero distance */
+	if ( geographic_point_equals(a, b) )
+		return 0.0;
+
 	geod_init(&gd, spheroid->a, spheroid->f);
 	double lat1 = a->lat * 180.0 / M_PI;
 	double lon1 = a->lon * 180.0 / M_PI;

-----------------------------------------------------------------------

Summary of changes:
 NEWS                   | 3 ++-
 liblwgeom/lwspheroid.c | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)


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