--- /dev/null
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+
+(in-package "SB!BYTECODE")
+
+;;; This is defined here so that the printer etc. can call
+;;; INTERPRETED-FUNCTION-P before the full interpreter is loaded.
+
+;;; an interpreted function
+(defstruct (interpreted-function
+ (:alternate-metaclass sb!kernel:funcallable-instance
+ sb!kernel:funcallable-structure-class
+ sb!kernel:make-funcallable-structure-class)
+ (:type sb!kernel:funcallable-structure)
+ (:constructor %make-interpreted-function)
+ (:copier nil)
+ ;; FIXME: Binding PRINT-OBJECT isn't going to help unless
+ ;; we fix the print-a-funcallable-instance code so that
+ ;; it calls PRINT-OBJECT in this case.
+ (:print-object
+ (lambda (x stream)
+ (print-unreadable-object (x stream :identity t)
+ (interpreted-function-%name x)))))
+ ;; The name of this interpreted function, or NIL if none specified.
+ (%name nil)
+ ;; This function's debug arglist.
+ (arglist nil)
+ ;; A lambda that can be converted to get the definition.
+ (lambda nil)
+ ;; If this function has been converted, then this is the XEP. If this is
+ ;; false, then the function is not in the cache (or is in the process of
+ ;; being removed.)
+ (definition nil :type (or sb!c::clambda null))
+ ;; The number of consecutive GCs that this function has been unused.
+ ;; This is used to control cache replacement.
+ (gcs 0 :type sb!c::index)
+ ;; True if Lambda has been converted at least once, and thus warnings should
+ ;; be suppressed on additional conversions.
+ (converted-once nil)
+ ;; For a closure, the closure date vector.
+ (closure nil :type (or null simple-vector)))
+\f
+;;; FIXME: Could we make this extra IN-PACKAGE go away, so that all
+;;; this bytecode interpreter implementation stuff was in the
+;;; SB!BYTECODE package?
+(in-package "SB!IMPL")
+
+;;;; EVAL and friends
+
+;;; This needs to be initialized in the cold load, since the top-level
+;;; catcher will always restore the initial value.
+(defvar *eval-stack-top* 0)
+
+;;; general case of EVAL (except in that it can't handle toplevel
+;;; EVAL-WHEN magic properly): Delegate to the byte compiler.
+(defun sb!bytecode:internal-eval (expr)
+ (funcall (compile (gensym "EVAL-TMPFUN-")
+ `(lambda ()
+
+ ;; SPEED=0,DEBUG=1 => byte-compile
+ (declare (optimize (speed 0) (debug 1)))
+
+ ;; Other than that, basically we care about
+ ;; compilation speed, compilation speed, and
+ ;; compilation speed. (There are cases where
+ ;; the user wants something else, but we don't
+ ;; know enough to guess that; and if he is
+ ;; unhappy about our guessed emphasis, he
+ ;; should explicitly compile his code, with
+ ;; explicit declarations to tell us what to
+ ;; emphasize.)
+ (declare (optimize (space 1) (safety 1)))
+ (declare (optimize (compilation-speed 3)))
+
+ ,expr))))
+
+;;; Pick off a few easy cases, and call INTERNAL-EVAL for the rest. If
+;;; *ALREADY-EVALED-THIS* is true, then we bind it to NIL before doing
+;;; a call so that the effect is confined to the lexical scope of the
+;;; EVAL-WHEN.
+(defun eval (original-exp)
+ #!+sb-doc
+ "Evaluate the argument in a null lexical environment, returning the
+ result or results."
+ (declare (optimize (safety 1)))
+ (let ((exp (macroexpand original-exp)))
+ (typecase exp
+ (symbol
+ (ecase (info :variable :kind exp)
+ (:constant
+ (values (info :variable :constant-value exp)))
+ ((:special :global)
+ (symbol-value exp))
+ (:alien
+ (sb!bytecode:internal-eval original-exp))))
+ (list
+ (let ((name (first exp))
+ (args (1- (length exp))))
+ (case name
+ (function
+ (unless (= args 1)
+ (error "wrong number of args to FUNCTION:~% ~S" exp))
+ (let ((name (second exp)))
+ (if (or (atom name)
+ (and (consp name)
+ (eq (car name) 'setf)))
+ (fdefinition name)
+ (sb!bytecode:internal-eval original-exp))))
+ (quote
+ (unless (= args 1)
+ (error "wrong number of args to QUOTE:~% ~S" exp))
+ (second exp))
+ (setq
+ (unless (evenp args)
+ (error "odd number of args to SETQ:~% ~S" exp))
+ (unless (zerop args)
+ (do ((name (cdr exp) (cddr name)))
+ ((null name)
+ (do ((args (cdr exp) (cddr args)))
+ ((null (cddr args))
+ ;; We duplicate the call to SET so that the
+ ;; correct value gets returned.
+ (set (first args) (eval (second args))))
+ (set (first args) (eval (second args)))))
+ (let ((symbol (first name)))
+ (case (info :variable :kind symbol)
+ ;; FIXME: I took out the *TOP-LEVEL-AUTO-DECLARE*
+ ;; test here, and removed the *TOP-LEVEL-AUTO-DECLARE*
+ ;; variable; the code should now act as though that
+ ;; variable is NIL. This should be tested..
+ (:special)
+ (t (return (sb!bytecode:internal-eval original-exp))))))))
+ ((progn)
+ (when (> args 0)
+ (dolist (x (butlast (rest exp)) (eval (car (last exp))))
+ (eval x))))
+ ((eval-when)
+ (if (and (> args 0)
+ (or (member 'eval (second exp))
+ (member :execute (second exp))))
+ (when (> args 1)
+ (dolist (x (butlast (cddr exp)) (eval (car (last exp))))
+ (eval x)))
+ (sb!bytecode:internal-eval original-exp)))
+ (t
+ (if (and (symbolp name)
+ (eq (info :function :kind name) :function))
+ (collect ((args))
+ (dolist (arg (rest exp))
+ (args (eval arg)))
+ (apply (symbol-function name) (args)))
+ (sb!bytecode:internal-eval original-exp))))))
+ (t
+ exp))))
+
+;;; Given a function, return three values:
+;;; 1] A lambda expression that could be used to define the function,
+;;; or NIL if the definition isn't available.
+;;; 2] NIL if the function was definitely defined in a null lexical
+;;; environment, and T otherwise.
+;;; 3] Some object that \"names\" the function. Although this is
+;;; allowed to be any object, CMU CL always returns a valid
+;;; function name or a string.
+;;;
+;;; If interpreted, use the interpreter interface. Otherwise, see
+;;; whether it was compiled with COMPILE. If that fails, check for an
+;;; inline expansion.
+(defun function-lambda-expression (fun)
+ (declare (type function fun))
+ (let* ((fun (%function-self fun))
+ (name (%function-name fun))
+ (code (sb!di::function-code-header fun))
+ (info (sb!kernel:%code-debug-info code)))
+ (if info
+ (let ((source (first (sb!c::compiled-debug-info-source info))))
+ (cond ((and (eq (sb!c::debug-source-from source) :lisp)
+ (eq (sb!c::debug-source-info source) fun))
+ (values (second (svref (sb!c::debug-source-name source) 0))
+ nil name))
+ ((stringp name)
+ (values nil t name))
+ (t
+ (let ((exp (info :function :inline-expansion name)))
+ (if exp
+ (values exp nil name)
+ (values nil t name))))))
+ (values nil t name))))
+
+;;; This is like FIND-IF, except that we do it on a compiled closure's
+;;; environment.
+(defun find-if-in-closure (test fun)
+ (dotimes (index (1- (get-closure-length fun)))
+ (let ((elt (%closure-index-ref fun index)))
+ (when (funcall test elt)
+ (return elt)))))
+\f
+;;; miscellaneous full function definitions of things which are
+;;; ordinarily handled magically by the compiler
+
+(defun apply (function arg &rest arguments)
+ #!+sb-doc
+ "Apply FUNCTION to a list of arguments produced by evaluating ARGUMENTS in
+ the manner of LIST*. That is, a list is made of the values of all but the
+ last argument, appended to the value of the last argument, which must be a
+ list."
+ (cond ((atom arguments)
+ (apply function arg))
+ ((atom (cdr arguments))
+ (apply function (cons arg (car arguments))))
+ (t (do* ((a1 arguments a2)
+ (a2 (cdr arguments) (cdr a2)))
+ ((atom (cdr a2))
+ (rplacd a1 (car a2))
+ (apply function (cons arg arguments)))))))
+
+(defun funcall (function &rest arguments)
+ #!+sb-doc
+ "Call FUNCTION with the given ARGUMENTS."
+ (apply function arguments))
+
+(defun values (&rest values)
+ #!+sb-doc
+ "Return all arguments, in order, as values."
+ (values-list values))
+
+(defun values-list (list)
+ #!+sb-doc
+ "Return all of the elements of LIST, in order, as values."
+ (values-list list))
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