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#![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::{Builder as WindowBuilder, 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,
#[error("This version of GLFW is unsupported")]
UnsupportedVersion,
/// 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))
}
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