From 88e064a448756bb4a9045a9260702f60ba492990 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Tue, 26 Apr 2016 02:40:23 -0400
Subject: get ffi framework in place

---
 Cargo.toml     |  7 +++++++
 build.rs       | 16 ++++++++++++++++
 src/lib.rs     | 11 +++++------
 src/screen.rs  | 35 +++++++++++++++++++++++++++++++++++
 tests/basic.rs | 11 +++++++++++
 5 files changed, 74 insertions(+), 6 deletions(-)
 create mode 100644 src/screen.rs
 create mode 100644 tests/basic.rs

diff --git a/Cargo.toml b/Cargo.toml
index 09b94f4..c703990 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,3 +3,10 @@ name = "vt100"
 version = "0.1.0"
 authors = ["Jesse Luehrs <doy@tozt.net>"]
 build = "build.rs"
+
+[build-dependencies]
+pkg-config = "0.3.8"
+
+[dependencies]
+libc = "0.2.10"
+glib-sys = "0.3.0"
diff --git a/build.rs b/build.rs
index 14c4082..e5bb100 100644
--- a/build.rs
+++ b/build.rs
@@ -1,3 +1,5 @@
+extern crate pkg_config;
+
 fn main() {
     std::env::set_current_dir("libvt100")
         .unwrap_or_else(|e| { panic!("failed to chdir: {}", e) });
@@ -9,4 +11,18 @@ fn main() {
         println!("{}", std::string::String::from_utf8_lossy(&out.stderr));
         std::process::exit(out.status.code().unwrap_or(255));
     }
+
+    println!("cargo:rustc-link-search=native=libvt100");
+    println!("cargo:rustc-link-lib=static=vt100");
+
+    let lib_def = pkg_config::probe_library("glib-2.0")
+        .unwrap_or_else(|e| {
+            panic!("Couldn't find required dependency glib-2.0: {}", e);
+        });
+    for dir in lib_def.link_paths {
+        println!("cargo:rustc-link-search=native={:?}", dir);
+    }
+    for lib in lib_def.libs {
+        println!("cargo:rustc-link-lib={}", lib);
+    }
 }
diff --git a/src/lib.rs b/src/lib.rs
index cdfbe1a..92267a1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,5 @@
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-    }
-}
+extern crate libc;
+
+mod screen;
+
+pub use screen::Screen;
diff --git a/src/screen.rs b/src/screen.rs
new file mode 100644
index 0000000..b448a20
--- /dev/null
+++ b/src/screen.rs
@@ -0,0 +1,35 @@
+use libc;
+
+enum ScreenImpl {}
+pub struct Screen(*mut ScreenImpl);
+
+impl Screen {
+    pub fn new(rows: u32, cols: u32) -> Screen {
+        let screen_impl = unsafe {
+            vt100_screen_new(rows as libc::c_int, cols as libc::c_int)
+        };
+        Screen(screen_impl)
+    }
+}
+
+impl Drop for Screen {
+    fn drop(&mut self) {
+        let &mut Screen(screen_impl) = self;
+        unsafe { vt100_screen_delete(screen_impl) };
+    }
+}
+
+extern "C" {
+    fn vt100_screen_new(rows: libc::c_int, cols: libc::c_int) -> *mut ScreenImpl;
+    fn vt100_screen_delete(screen: *mut ScreenImpl);
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn ffi() {
+        let ptr = unsafe { super::vt100_screen_new(24, 80) };
+        assert!(!ptr.is_null());
+        unsafe { super::vt100_screen_delete(ptr) };
+    }
+}
diff --git a/tests/basic.rs b/tests/basic.rs
new file mode 100644
index 0000000..c52a574
--- /dev/null
+++ b/tests/basic.rs
@@ -0,0 +1,11 @@
+extern crate vt100;
+
+#[cfg(test)]
+mod tests {
+    use vt100;
+
+    #[test]
+    fn object_creation() {
+        let _ = vt100::Screen::new(24, 80);
+    }
+}
-- 
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