[librsvg] marker.rs: Extract marker positions from segments in separate functions

[Federico Mena Quintero <federico src gnome org>]

commit 1756c70e1eb81e7048cfcd63682e7fe11687f3fc
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Mar 2 13:10:56 2017 -0600

    marker.rs: Extract marker positions from segments in separate functions

 rust/src/marker.rs |   50 ++++++++++++++++++++------------------------------
 1 files changed, 20 insertions(+), 30 deletions(-)
---
diff --git a/rust/src/marker.rs b/rust/src/marker.rs
index 6792195..e2eb77f 100644
--- a/rust/src/marker.rs
+++ b/rust/src/marker.rs
@@ -611,27 +611,30 @@ fn emit_marker_by_name (draw_ctx:       *const RsvgDrawingCtx,
     drawing_ctx::release_node (draw_ctx, c_node);
 }
 
+fn get_marker_position_at_start_of_segment (segment: &Segment) -> (f64, f64) {
+    match *segment {
+        Segment::Degenerate  { x, y } => (x, y),
+
+        Segment::LineOrCurve { x1, y1, .. } => (x1, y1)
+    }
+}
+
+fn get_marker_position_at_end_of_segment (segment: &Segment) -> (f64, f64) {
+    match *segment {
+        Segment::Degenerate  { x, y } => (x, y),
+
+        Segment::LineOrCurve { x4, y4, .. } => (x4, y4)
+    }
+}
+
 fn emit_marker_at_start_of_segment (segment: &Segment,
                                     marker_name: *const libc::c_char,
                                     orient: f64,
                                     line_width: f64,
                                     draw_ctx: *const RsvgDrawingCtx) {
-    let xpos: f64;
-    let ypos: f64;
-
-    match *segment {
-        Segment::Degenerate { x, y } => {
-            xpos = x;
-            ypos = y;
-        },
-
-        Segment::LineOrCurve { x1, y1, .. } => {
-            xpos = x1;
-            ypos = y1;
-        }
-    }
+    let (x, y) = get_marker_position_at_start_of_segment (segment);
 
-    emit_marker_by_name (draw_ctx, marker_name, xpos, ypos, orient, line_width);
+    emit_marker_by_name (draw_ctx, marker_name, x, y, orient, line_width);
 }
 
 fn emit_marker_at_end_of_segment (segment: &Segment,
@@ -639,22 +642,9 @@ fn emit_marker_at_end_of_segment (segment: &Segment,
                                   orient: f64,
                                   line_width: f64,
                                   draw_ctx: *const RsvgDrawingCtx) {
-    let xpos: f64;
-    let ypos: f64;
-
-    match *segment {
-        Segment::Degenerate { x, y } => {
-            xpos = x;
-            ypos = y;
-        },
-
-        Segment::LineOrCurve { x4, y4, .. } => {
-            xpos = x4;
-            ypos = y4;
-        }
-    }
+    let (x, y) = get_marker_position_at_end_of_segment (segment);
 
-    emit_marker_by_name (draw_ctx, marker_name, xpos, ypos, orient, line_width);
+    emit_marker_by_name (draw_ctx, marker_name, x, y, orient, line_width);
 }
 
 extern "C" {