remove some unnecessary wrappers

3 files changed, 19 insertions, 14 deletions

diff --git a/src/ffi.c b/src/ffi.c
index fb2a3b3..f3d1ecf 100644
--- a/src/ffi.c
+++ b/src/ffi.c
@@ -1,16 +1,6 @@
 #include <stdlib.h>
 #include "../libvt100/src/vt100.h"
 
-int vt100_wrapper_rows(VT100Screen *vt)
-{
-    return vt->grid->max.row;
-}
-
-int vt100_wrapper_cols(VT100Screen *vt)
-{
-    return vt->grid->max.col;
-}
-
 int vt100_wrapper_cell_is_wide(struct vt100_cell *cell)
 {
     return cell->is_wide;
diff --git a/src/ffi.rs b/src/ffi.rs
index 550e3b0..4586bcd 100644
--- a/src/ffi.rs
+++ b/src/ffi.rs
@@ -38,8 +38,6 @@ extern "C" {
         col: libc::c_int,
     ) -> *mut types::CellImpl;
 
-    pub fn vt100_wrapper_rows(screen: *mut types::ScreenImpl) -> libc::c_int;
-    pub fn vt100_wrapper_cols(screen: *mut types::ScreenImpl) -> libc::c_int;
     pub fn vt100_wrapper_cell_is_wide(cell: *mut types::CellImpl) -> libc::c_int;
     pub fn vt100_wrapper_cell_bold(cell: *mut types::CellImpl) -> libc::c_int;
     pub fn vt100_wrapper_cell_italic(cell: *mut types::CellImpl) -> libc::c_int;
diff --git a/src/screen.rs b/src/screen.rs
index d3e026f..074feff 100644
--- a/src/screen.rs
+++ b/src/screen.rs
@@ -7,6 +7,17 @@ use types;
 
 pub struct Screen(*mut types::ScreenImpl);
 
+#[repr(C)]
+struct ScreenGridPrefix {
+    cur: types::Loc,
+    max: types::Loc,
+}
+
+#[repr(C)]
+struct ScreenImplPrefix {
+    grid: *mut ScreenGridPrefix,
+}
+
 impl Screen {
     pub fn new(rows: i32, cols: i32) -> Screen {
         let screen_impl = unsafe {
@@ -17,12 +28,18 @@ impl Screen {
 
     pub fn rows(&self) -> i32 {
         let Screen(screen_impl) = *self;
-        unsafe { ffi::vt100_wrapper_rows(screen_impl) }
+        let prefix: *mut ScreenImplPrefix = unsafe {
+            std::mem::transmute(screen_impl)
+        };
+        unsafe { (*(*prefix).grid).max.row }
     }
 
     pub fn cols(&self) -> i32 {
         let Screen(screen_impl) = *self;
-        unsafe { ffi::vt100_wrapper_cols(screen_impl) }
+        let prefix: *mut ScreenImplPrefix = unsafe {
+            std::mem::transmute(screen_impl)
+        };
+        unsafe { (*(*prefix).grid).max.col }
     }
 
     pub fn set_window_size(&self, rows: i32, cols: i32) {