- (let ((*load-depth* (1+ *load-depth*))
- ;; KLUDGE: I can't find in the ANSI spec where it says that
- ;; DECLAIM/PROCLAIM of optimization policy should have file
- ;; scope. CMU CL did this, and it seems reasonable, but it
- ;; might not be right; after all, things like (PROCLAIM '(TYPE
- ;; ..)) don't have file scope, and I can't find anything under
- ;; PROCLAIM or COMPILE-FILE or LOAD or OPTIMIZE which
- ;; justifies this behavior. Hmm. -- WHN 2001-04-06
- (sb!c::*policy* sb!c::*policy*)
- ;; The ANSI spec for LOAD says "LOAD binds *READTABLE* and
- ;; *PACKAGE* to the values they held before loading the file."
- (*package* (sane-package))
- (*readtable* *readtable*)
- ;; The old CMU CL LOAD function used an IF-DOES-NOT-EXIST
- ;; argument of (MEMBER :ERROR NIL) type. ANSI constrains us to
- ;; accept a generalized boolean argument value for this
- ;; externally-visible function, but the internal functions
- ;; still use the old convention.
- (internal-if-does-not-exist (if if-does-not-exist :error nil)))
- ;; FIXME: This VALUES wrapper is inherited from CMU CL. Once SBCL
- ;; gets function return type checking right, we can achieve a
- ;; similar effect better by adding FTYPE declarations.
- (values
- (if (streamp filespec)
- (if (or (equal (stream-element-type filespec)
- '(unsigned-byte 8)))
- (load-as-fasl filespec verbose print)
- (load-as-source filespec verbose print))
- (let* ((pathname (pathname filespec))
- (physical-pathname (translate-logical-pathname pathname))
- (probed-file (probe-file physical-pathname)))
- (if (or probed-file
- (pathname-type physical-pathname))
- (internal-load physical-pathname
- probed-file
- internal-if-does-not-exist
- verbose
- print)
- (internal-load-default-type pathname
- internal-if-does-not-exist
- verbose
- print)))))))
+ (let* ((header-line (make-array
+ (length *fasl-header-string-start-string*)
+ :element-type '(unsigned-byte 8))))
+ (read-sequence header-line stream)
+ (if (mismatch header-line *fasl-header-string-start-string*
+ :test #'(lambda (code char) (= code (char-code char))))
+ (let ((truename (probe-file stream)))
+ (when (and truename
+ (string= (pathname-type truename) *fasl-file-type*))
+ (error 'fasl-header-missing
+ :stream (namestring truename)
+ :fhsss header-line
+ :expected *fasl-header-string-start-string*)))
+ (progn
+ (file-position stream :start)
+ (return-from load
+ (load-stream stream))))))
+ (with-open-file (stream pathname :external-format external-format)
+ (load-stream stream)))))
+
+;; This implements the defaulting SBCL seems to have inherited from
+;; CMU. This routine does not try to perform any loading; all it does
+;; is return the pathname (not the truename) of a file to be loaded,
+;; or NIL if no such file can be found. This routine is supposed to
+;; signal an error if a fasl's timestamp is older than its source
+;; file, but we protect against errors in PROBE-FILE, because any of
+;; the ways that we might fail to find a defaulted file are reasons
+;; not to load it, but not worth exposing to the user who didn't
+;; expicitly ask us to load a file with a made-up name (e.g., the
+;; defaulted filename might exceed filename length limits).
+(defun probe-load-defaults (pathname)
+ (destructuring-bind (defaulted-source-pathname
+ defaulted-source-truename
+ defaulted-fasl-pathname
+ defaulted-fasl-truename)
+ (loop for type in (list *load-source-default-type*
+ *fasl-file-type*)
+ as probe-pathname = (make-pathname :type type
+ :defaults pathname)
+ collect probe-pathname
+ collect (handler-case (probe-file probe-pathname)
+ (file-error () nil)))
+ (cond ((and defaulted-fasl-truename
+ defaulted-source-truename
+ (> (file-write-date defaulted-source-truename)
+ (file-write-date defaulted-fasl-truename)))
+ (restart-case
+ (error "The object file ~A is~@
+ older than the presumed source:~% ~A."
+ defaulted-fasl-truename
+ defaulted-source-truename)
+ (source () :report "load source file"
+ defaulted-source-pathname)
+ (object () :report "load object file"
+ defaulted-fasl-pathname)))
+ (defaulted-fasl-truename defaulted-fasl-pathname)
+ (defaulted-source-truename defaulted-source-pathname))))