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(in-package #:mulk.objective-cl)
(pushnew
(merge-pathnames (make-pathname :directory '(:relative "Objective-C"
"shared_obj")
:type ""
:name "")
(asdf:component-pathname (asdf:find-system
'#:objective-cl)))
cffi:*foreign-library-directories*)
(define-foreign-library libobjcl
(:unix (:or "libobjcl.so"
"libobjcl.so.0"))
(t (:default "libobjcl")))
(use-foreign-library libobjcl)
;; FIXME: docs
(defcfun ("objcl_initialise_runtime" initialise-runtime) :void)
;; FIXME: docs
(defcfun ("objcl_shutdown_runtime" shutdown-runtime) :void)
(defcfun ("objcl_invoke_instance_method"
%objcl-invoke-instance-method) obj-data
(receiver obj-data)
(method-name :string)
(argc :int)
&rest)
(defcfun ("objcl_invoke_class_method"
%objcl-invoke-class-method) obj-data
(receiver obj-data)
(method-name :string)
(argc :int)
&rest)
(defcfun ("objcl_find_class" %objcl-find-class) :pointer
(class-name :string))
(defcfun ("objcl_class_name" %objcl-class-name) :string
(class obj-data))
(defun symbol->objc-class-name (symbol)
(let ((components (split-sequence #\- (symbol-name symbol)
:remove-empty-subseqs t)))
(reduce #'(lambda (x y) (concatenate 'string x y))
(mapcar #'(lambda (x)
(concatenate 'string
(string (char x 0))
(string-downcase (subseq x 1))))
(subseq components 1))
:initial-value (concatenate 'string
(string (char (first components) 0))
(string-upcase
(subseq (first components) 1))))))
(defun find-objc-class (class-name)
"Retrieve an Objective C class by name.
## Arguments and Values:
*class-name* --- a **symbol** or a **string**.
Returns: *class* --- an __objc-class__ object representing the Objective
C class whose name is *class-name*.
## Description:
If *class-name* is a **symbol** which does not contain a hyphen, its
**name** is converted to **lowercase** except for the first letter,
which is left intact, and the resulting **string** used as if directly
given as an **argument** to __find-objc-class__.
If *class-name* is a **symbol** which containts a hyphen, its **name**
is split into components separated by hyphens and each component
converted into a **string** according to the following rules:
1. The first component is fully converted to **uppercase** except for
its first letter, which is left intact.
2. Any additional components have all of their letters converted to
**lowercase**, except for their first letters, which are left intact.
After that, the components are concatenated in order and the resulting
**string** used as if directly given as an **argument** to
__find-objc-class__.
## Examples:
(find-objc-class \"NSObject\") ;=> #<OBJC-CLASS NSObject>
(find-objc-class 'ns-object) ;=> #<OBJC-CLASS NSObject>
(find-objc-class 'nsobject) ;=> NIL
## Rationale:
The first component of an Objective C class name is conventionally
thought of as a namespace identifier. It is therefore sensible to
expect it to be converted to **uppercase** by default, which is the
conventional case for namespace identifiers in Objective C."
(typecase class-name
(string (find-objc-class-by-name class-name))
(symbol (find-objc-class-by-name (symbol->objc-class-name class-name)))))
(defun find-objc-class-by-name (class-name)
(let ((obj-data (%objcl-find-class class-name)))
(prog1
(if (null-pointer-p (foreign-slot-value
(foreign-slot-value obj-data 'obj-data 'data)
'obj-data-union
'class-val))
nil
(obj-data->lisp obj-data))
(dealloc-obj-data obj-data))))
(defun objcl-class-name (class)
(declare (type (or objc-class objc-id objc-exception) class))
(let ((obj-data (foreign-alloc 'obj-data)))
(with-foreign-slots ((type data) obj-data obj-data)
(setf (foreign-slot-value data
'obj-data-union
(etypecase class
(objc-class 'class-val)
(objc-id 'id-val)
(objc-exception 'exc-val)))
(pointer-to class))
(setf type (foreign-string-alloc (etypecase class
(objc-class "#")
(objc-id "@")
(objc-exception "E")))))
(prog1
(%objcl-class-name obj-data)
(dealloc-obj-data obj-data))))
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