From 567863b2398b6832f686b258709396572af0e980 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Wed, 2 Oct 2024 21:22:19 -0400
Subject: First commit!

---
 sdl3/bindings/utils.scm | 60 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 sdl3/bindings/utils.scm

(limited to 'sdl3/bindings/utils.scm')

diff --git a/sdl3/bindings/utils.scm b/sdl3/bindings/utils.scm
new file mode 100644
index 0000000..738f2bc
--- /dev/null
+++ b/sdl3/bindings/utils.scm
@@ -0,0 +1,60 @@
+;;; guile-sdl3 -- Scheme bindings for SDL3
+;;; Copyright © 2024 David Thompson <dthompson2@worcester.edu>
+;;;
+;;; Licensed under the Apache License, Version 2.0 (the "License");
+;;; you may not use this file except in compliance with the License.
+;;; You may obtain a copy of the License at
+;;;
+;;;    http://www.apache.org/licenses/LICENSE-2.0
+;;;
+;;; Unless required by applicable law or agreed to in writing, software
+;;; distributed under the License is distributed on an "AS IS" BASIS,
+;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+;;; See the License for the specific language governing permissions and
+;;; limitations under the License.
+
+;;; Commentary:
+;;
+;; Low-level FFI binding utilities.
+;;
+;;; Code:
+
+(define-module (sdl3 bindings utils)
+  #:use-module (sdl3 config)
+  #:use-module (sdl3 guardian)
+  #:use-module (srfi srfi-9)
+  #:use-module (srfi srfi-9 gnu)
+  #:use-module (system foreign)
+  #:use-module (system foreign-library)
+  #:export (bool
+            define-sdl
+            define-sdl-pointer-type))
+
+;; Type aliases:
+(define bool uint8)
+
+(define-syntax define-sdl
+  (lambda (stx)
+    (syntax-case stx (->)
+      ((_ name arg-type ... -> return-type)
+       #`(define name
+           (foreign-library-function %libsdl3
+                                     #,(symbol->string (syntax->datum #'name))
+                                     #:arg-types (list arg-type ...)
+                                     #:return-type return-type)))
+      ((_ name arg-type ...)
+       #'(define-sdl name arg-type ... -> void)))))
+
+(define-syntax-rule (define-sdl-pointer-type name
+                      pred wrap unwrap
+                      destroyed-pred set-destroyed
+                      print)
+  (begin
+    (define-record-type name
+      (ctor ptr)
+      pred
+      (ptr unwrap)
+      (destroyed? destroyed-pred set-destroyed))
+    (define (wrap ptr)
+      (sdl-protect (ctor ptr)))
+    (set-record-type-printer! name print)))
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