From: Sandro Santilli <strk@keybit.net>
Date: Thu, 12 Jan 2012 08:51:53 +0000 (+0000)
Subject: Expose gbox_float_round to liblwgeom API
X-Git-Tag: 2.0.0alpha1~97
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a58b999828bc032ee40b0c3f98a0af0783c1191f;p=postgis

Expose gbox_float_round to liblwgeom API

git-svn-id: http://svn.osgeo.org/postgis/trunk@8783 b70326c6-7e19-0410-871a-916f4a2858ee
---

diff --git a/liblwgeom/g_box.c b/liblwgeom/g_box.c
index fb6bcf521..61cb1d6db 100644
--- a/liblwgeom/g_box.c
+++ b/liblwgeom/g_box.c
@@ -568,3 +568,22 @@ int lwgeom_calculate_gbox_cartesian(const LWGEOM *lwgeom, GBOX *gbox)
 	lwerror("unsupported type (%d) - %s", lwgeom->type, lwtype_name(lwgeom->type));
 	return LW_FAILURE;
 }
+
+void gbox_float_round(GBOX *gbox)
+{
+	gbox->xmin = next_float_down(gbox->xmin);
+	gbox->xmax = next_float_up(gbox->xmax);
+
+	gbox->ymin = next_float_down(gbox->ymin);
+	gbox->ymax = next_float_up(gbox->ymax);
+
+	gbox->mmin = next_float_down(gbox->mmin);
+	gbox->mmax = next_float_up(gbox->mmax);
+
+	if ( FLAGS_GET_Z(gbox->flags) )
+	{
+		gbox->zmin = next_float_down(gbox->zmin);
+		gbox->zmax = next_float_up(gbox->zmax);
+	}
+}
+
diff --git a/liblwgeom/g_serialized.c b/liblwgeom/g_serialized.c
index e706c977f..9006cbf44 100644
--- a/liblwgeom/g_serialized.c
+++ b/liblwgeom/g_serialized.c
@@ -126,25 +126,6 @@ char* gserialized_to_string(const GSERIALIZED *g)
 	return lwgeom_to_wkt(lwgeom_from_gserialized(g), WKT_ISO, 12, 0);
 }
 
-/* TODO: expose to internal API ? */
-static void gbox_float_round(GBOX *gbox)
-{
-	gbox->xmin = next_float_down(gbox->xmin);
-	gbox->xmax = next_float_up(gbox->xmax);
-
-	gbox->ymin = next_float_down(gbox->ymin);
-	gbox->ymax = next_float_up(gbox->ymax);
-
-	gbox->mmin = next_float_down(gbox->mmin);
-	gbox->mmax = next_float_up(gbox->mmax);
-
-	if ( FLAGS_GET_Z(gbox->flags) )
-	{
-		gbox->zmin = next_float_down(gbox->zmin);
-		gbox->zmax = next_float_up(gbox->zmax);
-	}
-}
-
 int gserialized_read_gbox_p(const GSERIALIZED *g, GBOX *gbox)
 {
 
diff --git a/liblwgeom/liblwgeom.h.in b/liblwgeom/liblwgeom.h.in
index 3c20e6872..b4f340d7b 100644
--- a/liblwgeom/liblwgeom.h.in
+++ b/liblwgeom/liblwgeom.h.in
@@ -1547,6 +1547,14 @@ extern size_t gbox_serialized_size(uint8_t flags);
 */
 extern int gbox_same(const GBOX *g1, const GBOX *g2);
 
+/**
+ * Round given GBOX to float boundaries
+ *
+ * This turns a GBOX into the version it would become
+ * after a serialize/deserialize round trip.
+ */
+extern void gbox_float_round(GBOX *gbox);
+
 /**
 * Utility function to get type number from string. For example, a string 'POINTZ' 
 * would return type of 1 and z of 1 and m of 0. Valid