X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-extensions.lisp;h=f97607b284569f124959110d8f518e99bbf13af1;hb=444d2072bc52e60a41af62ee22e343e76109212f;hp=2daa462f9b877b2ea01f9c8cc5f0cf852c09163c;hpb=231721189e1e2431597dc013aaf5eee01bc41a51;p=sbcl.git

diff --git a/src/code/target-extensions.lisp b/src/code/target-extensions.lisp
index 2daa462..f97607b 100644
--- a/src/code/target-extensions.lisp
+++ b/src/code/target-extensions.lisp
@@ -1,10 +1,10 @@
-;;;; This file contains things for the extensions package which can't
-;;;; be built at cross-compile time, and perhaps also some things
-;;;; which might as well not be built at cross-compile time because
-;;;; they're not needed then. Things which can't be built at
-;;;; cross-compile time (e.g. because they need machinery which only
-;;;; exists inside SBCL's implementation of the LISP package) do not
-;;;; belong in this file.
+;;;; This file contains things for the extensions packages (SB-EXT and
+;;;; also "internal extensions" SB-INT) which can't be built at
+;;;; cross-compile time, and perhaps also some things which might as
+;;;; well not be built at cross-compile time because they're not
+;;;; needed then. Things which can't be built at cross-compile time
+;;;; (e.g. because they need machinery which only exists inside SBCL's
+;;;; implementation of the LISP package) do not belong in this file.
 
 ;;;; This software is part of the SBCL system. See the README file for
 ;;;; more information.
@@ -17,30 +17,67 @@
 
 (in-package "SB!IMPL")
 
-;;;; miscellaneous I/O
+;;;; variables initialization and shutdown sequences
 
-;;; INDENTING-FURTHER is a user-level macro which may be used to locally
-;;; increment the indentation of a stream.
-(defmacro indenting-further (stream more &rest body)
+;; (Most of the save-a-core functionality is defined later, in its
+;; own file, but we'd like to have these symbols declared special
+;; and initialized ASAP.)
+(defvar *save-hooks* nil
   #!+sb-doc
-  "Causes the output of the indenting Stream to indent More spaces. More is
-  evaluated twice."
-  `(unwind-protect
-     (progn
-      (incf (sb!impl::indenting-stream-indentation ,stream) ,more)
-      ,@body)
-     (decf (sb!impl::indenting-stream-indentation ,stream) ,more)))
-
-(defun skip-whitespace (&optional (stream *standard-input*))
-  (loop (let ((char (read-char stream)))
-	  (unless (sb!impl::whitespacep char)
-	    (return (unread-char char stream))))))
+  "This is a list of functions which are called in an unspecified
+order before creating a saved core image. Unused by SBCL itself:
+reserved for user and applications.")
 
+(defvar *init-hooks* nil
+  #!+sb-doc
+  "This is a list of functions which are called in an unspecified
+order when a saved core image starts up, after the system itself has
+been initialized. Unused by SBCL itself: reserved for user and
+applications.")
+
+
+;;; Binary search for simple vectors
+(defun binary-search (value seq &key (key #'identity))
+  (declare (simple-vector seq))
+  (labels ((recurse (start end)
+             (when (< start end)
+               (let* ((i (+ start (truncate (- end start) 2)))
+                      (elt (svref seq i))
+                      (key-value (funcall key elt)))
+                 (cond ((< value key-value)
+                        (recurse start i))
+                       ((> value key-value)
+                        (recurse (1+ i) end))
+                       (t
+                        elt))))))
+    (recurse 0 (length seq))))
+
+
 ;;; like LISTEN, but any whitespace in the input stream will be flushed
 (defun listen-skip-whitespace (&optional (stream *standard-input*))
   (do ((char (read-char-no-hang stream nil nil nil)
-	     (read-char-no-hang stream nil nil nil)))
+             (read-char-no-hang stream nil nil nil)))
       ((null char) nil)
-    (cond ((not (whitespace-char-p char))
-	   (unread-char char stream)
-	   (return t)))))
+    (cond ((not (whitespace[1]p char))
+           (unread-char char stream)
+           (return t)))))
+
+;;;; helpers for C library calls
+
+;;; Signal a SIMPLE-CONDITION/ERROR condition associated with an ANSI C
+;;; errno problem, arranging for the condition's print representation
+;;; to be similar to the ANSI C perror(3) style.
+(defun simple-perror (prefix-string
+                      &key
+                      (errno (get-errno))
+                      (simple-error 'simple-error)
+                      other-condition-args)
+  (declare (type symbol simple-error))
+  (aver (subtypep simple-error 'simple-condition))
+  (aver (subtypep simple-error 'error))
+  (apply #'error
+         simple-error
+         :format-control "~@<~A: ~2I~_~A~:>"
+         :format-arguments (list prefix-string (strerror errno))
+         other-condition-args))
+