Fixed error handling for bool specilization of constant trait

Author: 9prady9

src/data/mod.rs

@@ -133,12 +133,16 @@ impl ConstGenerator for Complex<f64> {
 
 #[allow(unused_mut)]
 impl ConstGenerator for bool {
-    fn generate(&self, dims: Dim4) -> Array {
+    fn generate(&self, dims: Dim4) -> Result<Array, AfError> {
         unsafe {
             let mut temp: i64 = 0;
-            af_constant(&mut temp as MutAfArray, *self as c_int as c_double,
-                              dims.ndims() as c_uint, dims.get().as_ptr() as *const DimT, 4);
-            Array::from(temp)
+            let err_val = af_constant(&mut temp as MutAfArray, *self as c_int as c_double,
+                                      dims.ndims() as c_uint,
+                                      dims.get().as_ptr() as *const DimT, 4);
+            match err_val {
+                0 => Ok(Array::from(temp)),
+                _ => Err(AfError::from(err_val)),
+            }
         }
     }
 }

src/graphics.rs

@@ -0,0 +1,26 @@
+extern crate libc;
+
+use defines::AfError;
+use defines::Aftype;
+use self::libc::{uint8_t, c_int, c_uint, c_double};
+
+type MutWindow = *mut self::libc::c_ulonglong;
+type Window    = self::libc::c_ulonglong;
+type AfArray   = self::libc::c_longlong;
+type Cell      = *const self::libc::c_void;
+
+#[allow(dead_code)]
+extern {
+    fn af_create_window(out: MutWindow, w: c_int, h: c_int, title: *const u8) -> c_int;
+    fn af_set_position(wnd: Window, x: c_uint, y: c_uint) -> c_int;
+    fn af_set_title(wnd: Window, title: *const u8) -> c_int;
+    fn af_draw_image(wnd: Window, arr: AfArray, props: Cell) -> c_int;
+    fn af_draw_plot(wnd: Window, x: AfArray,  y: AfArray, props: Cell) -> c_int;
+    fn af_grid(wnd: Window, rows: c_int, cols: c_int) -> c_int;
+    fn af_show(wnd: Window) -> c_int;
+    fn af_is_window_closed(out: *mut c_int, wnd: Window) -> c_int;
+    fn af_destroy_window(wnd: Window) -> c_int;
+
+    fn af_draw_hist(wnd: Window, x: AfArray,
+                    minval: c_double, maxval: c_double, props: Cell) -> c_int;
+}

src/lib.rs

@@ -40,6 +40,9 @@ mod defines;
 pub use dim4::Dim4;
 mod dim4;
 
+pub use graphics::Window;
+mod graphics;
+
 pub use image::{gaussian_kernel, load_image, save_image};
 pub use image::{resize, transform, rotate, translate, scale, skew};
 pub use image::{dilate, dilate3, erode, erode3, minfilt, maxfilt};