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glfw: add error handling

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2021-07-16 14:34:51 -07:00
parent 4b5f94c4ea
commit 1b1e184129
1 changed files with 25 additions and 3 deletions
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28
glfw/src/errors.zig
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@ -3,7 +3,7 @@
const c = @cImport(@cInclude("GLFW/glfw3.h")); const c = @cImport(@cInclude("GLFW/glfw3.h"));
/// Errors that GLFW can produce. /// Errors that GLFW can produce.
const Error = error{ pub const Error = error{
/// GLFW has not been initialized. /// GLFW has not been initialized.
/// ///
/// This occurs if a GLFW function was called that must not be called unless the library is /// This occurs if a GLFW function was called that must not be called unless the library is
@ -87,9 +87,9 @@ const Error = error{
NoWindowContext, NoWindowContext,
}; };
fn convertError(e: int) ?Error { fn convertError(e: c_int) Error!void {
return switch (e) { return switch (e) {
c.GLFW_NO_ERROR => null, c.GLFW_NO_ERROR => {},
c.GLFW_NOT_INITIALIZED => Error.NotInitialized, c.GLFW_NOT_INITIALIZED => Error.NotInitialized,
c.GLFW_NO_CURRENT_CONTEXT => Error.NoCurrentContext, c.GLFW_NO_CURRENT_CONTEXT => Error.NoCurrentContext,
c.GLFW_INVALID_ENUM => Error.InvalidEnum, c.GLFW_INVALID_ENUM => Error.InvalidEnum,
@ -100,5 +100,27 @@ fn convertError(e: int) ?Error {
c.GLFW_PLATFORM_ERROR => Error.PlatformError, c.GLFW_PLATFORM_ERROR => Error.PlatformError,
c.GLFW_FORMAT_UNAVAILABLE => Error.FormatUnavailable, c.GLFW_FORMAT_UNAVAILABLE => Error.FormatUnavailable,
c.GLFW_NO_WINDOW_CONTEXT => Error.NoWindowContext, c.GLFW_NO_WINDOW_CONTEXT => Error.NoWindowContext,
else => unreachable,
}; };
} }
/// Returns and clears the last error for the calling thread.
///
/// This function returns and clears the error code of the last error that occurred on the calling
/// thread, and optionally a UTF-8 encoded human-readable description of it. If no error has
/// occurred since the last call, it returns GLFW_NO_ERROR (zero) and the description pointer is
/// set to `NULL`.
///
/// * @param[in] description Where to store the error description pointer, or `NULL`.
/// @return The last error code for the calling thread, or @ref GLFW_NO_ERROR (zero).
///
/// @pointer_lifetime The returned string is allocated and freed by GLFW. You should not free it
/// yourself. It is guaranteed to be valid only until the next error occurs or the library is
/// terminated.
///
/// @remark This function may be called before @ref glfwInit.
///
/// @thread_safety This function may be called from any thread.
pub fn getError() Error!void {
return convertError(c.glfwGetError(null));
}