ndarray: add proper argument parenthetisation in macros

1 files changed, 6 insertions, 6 deletions

diff --git a/ndarray.h b/ndarray.h
index 42cb64f..db58254 100644
--- a/ndarray.h
+++ b/ndarray.h
@@ -45,13 +45,13 @@ typedef struct NDArray {
 
 #define NDARRAY_ALLOC_ZERO (1 << 0)
 
-#define NDIDX1D(arr, x)       (arr->stride[0] * x)
-#define NDIDX2D(arr, x, y)    (arr->stride[0] * y + arr->stride[1] * x)
-#define NDIDX3D(arr, x, y, z) (arr->stride[0] * z + arr->stride[1] * y + arr->stride[0] * x)
+#define NDIDX1D(arr, x)       ((arr)->stride[0] * (x))
+#define NDIDX2D(arr, x, y)    ((arr)->stride[0] * (y) + (arr)->stride[1] * (x))
+#define NDIDX3D(arr, x, y, z) ((arr)->stride[0] * (z) + (arr)->stride[1] * (y) + (arr)->stride[0] * (x))
 
-#define NDPTR1D(arr, x)       (arr->data + NDIDX1D(arr, x))
-#define NDPTR2D(arr, x, y)    (arr->data + NDIDX2D(arr, x, y))
-#define NDPTR3D(arr, x, y, z) (arr->data + NDIDX2D(arr, x, y, z))
+#define NDPTR1D(arr, x)       ((arr)->data + NDIDX1D(arr, x))
+#define NDPTR2D(arr, x, y)    ((arr)->data + NDIDX2D(arr, x, y))
+#define NDPTR3D(arr, x, y, z) ((arr)->data + NDIDX2D(arr, x, y, z))
 
 int mg2di_ndarray_alloc(NDArray **result, unsigned int dims,
                         const size_t * const size, unsigned int flags);