fix a double-free. add a generic value-swapping macro.

1 files changed, 3 insertions, 3 deletions

diff --git a/internal.h b/internal.h
index 6cd512c..8b6784f 100644
--- a/internal.h
+++ b/internal.h
@@ -45,7 +45,6 @@ void rmfbctl(Framebufctl*);
 
 /* vertex */
 Vertex dupvertex(Vertex*);
-void swapvertex(Vertex*, Vertex*);
 void lerpvertex(Vertex*, Vertex*, Vertex*, double);
 void berpvertex(Vertex*, Vertex*, Vertex*, Vertex*, Point3);
 void delvattrs(Vertex*);
@@ -58,8 +57,6 @@ int rectclipline(Rectangle, Point*, Point*, Vertex*, Vertex*);
 /* util */
 int min(int, int);
 int max(int, int);
-void swapi(int*, int*);
-void swappt(Point*, Point*);
 void memsetf(void*, float, usize);
 void memsetl(void*, ulong, usize);
 
@@ -70,3 +67,6 @@ uvlong nanosec(void);
 #define getpixel(fb, p) (((fb)->cb)[Dx((fb)->r)*(p).y + (p).x])
 /* void putpixel(Framebuf *fb, Point p, ulong c) */
 #define putpixel(fb, p, c) (((fb)->cb)[Dx((fb)->r)*(p).y + (p).x] = (c))
+
+/* void SWAP(type t, type *a, type *b) */
+#define SWAP(t, a, b) {t tmp; tmp = *(a); *(a) = *(b); *(b) = tmp;}