1 files changed, 50 insertions, 0 deletions
diff --git a/glfw/src/lib.rs b/glfw/src/lib.rs
new file mode 100644
index 0000000..889015b
--- /dev/null
+++ b/glfw/src/lib.rs
@@ -0,0 +1,50 @@
+#![deny(clippy::all, clippy::pedantic)]
+
+use std::ffi::{c_char, CStr};
+use std::ptr::null;
+
+mod ffi;
+mod init;
+mod util;
+
+pub mod window;
+
+pub use window::{Size as WindowSize, Window};
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error
+{
+    /// The current thread is not the main thread.
+    #[error("The current thread is not the main thread")]
+    NotInMainThread,
+
+    /// An internal nul byte was found in a window title.
+    #[error("An internal nul byte was found in the window title")]
+    InternalNulByteInWindowTitle,
+
+    /// GLFW error.
+    #[error("GLFW error {0} occured. {1}")]
+    GlfwError(i32, String),
+}
+
+fn get_glfw_error() -> Result<(), Error>
+{
+    let mut description_ptr: *const c_char = null();
+
+    let err = unsafe { crate::ffi::glfwGetError(&mut description_ptr) };
+
+    if err == crate::ffi::GLFW_NO_ERROR {
+        return Ok(());
+    }
+
+    // SAFETY: The description is guaranteed by GLFW to be valid UTF-8
+    let desc_str = unsafe {
+        std::str::from_utf8_unchecked(CStr::from_ptr(description_ptr).to_bytes())
+    };
+
+    // The description has to be copied because it is guaranteed to be valid only
+    // until the next GLFW error occurs or the GLFW library is terminated.
+    let description = desc_str.to_string();
+
+    Err(Error::GlfwError(err, description))
+}