#411 add len check for empty slices

peterstace · May 13, 2022 · d5d10af · d5d10af
1 parent 3487e8a
commit d5d10af
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diff --git a/geom/wkb_marshal.go b/geom/wkb_marshal.go
@@ -86,5 +86,8 @@ func (m *wkbMarshaler) writeSequence(seq Sequence) {
 // floatsAsBytes reinterprets the floats slice as a bytes slice in a similar
 // manner to reinterpret_cast in C++.
 func floatsAsBytes(floats []float64) []byte {
+	if len(floats) == 0 {
+		return nil
+	}
 	return unsafe.Slice((*byte)(unsafe.Pointer(&floats[0])), 8*len(floats))
 }
diff --git a/geom/wkb_parser.go b/geom/wkb_parser.go
@@ -223,6 +223,9 @@ func (p *wkbParser) parseLineString(ctype CoordinatesType) (LineString, error) {
 // bytesAsFloats reinterprets the bytes slice as a float64 slice in a similar
 // manner to reinterpret_cast in C++.
 func bytesAsFloats(byts []byte) []float64 {
+	if len(byts) == 0 {
+		return nil
+	}
 	return unsafe.Slice((*float64)(unsafe.Pointer(&byts[0])), len(byts)/8)
 }