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[clsql.git] / clsql-base / cmucl-compat.cl

diff --git a/clsql-base/cmucl-compat.cl b/clsql-base/cmucl-compat.cl
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+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          cmucl-compat.sql
+;;;; Purpose:       Compatiblity library for CMUCL functions
+;;;; Programmer:    Kevin M. Rosenberg
+;;;; Date Started:  Feb 2002
+;;;;
+;;;; $Id: cmucl-compat.cl,v 1.1 2002/08/01 03:06:26 kevin Exp $
+;;;;
+;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;;
+;;;; CLSQL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
+
+(declaim (optimize (debug 3) (speed 3) (safety 1) (compilation-speed 0)))
+(in-package :cl-user)
+
+(defpackage :cmucl-compat
+  (:export
+   #:shrink-vector
+   #:make-sequence-of-type
+   #:result-type-or-lose
+   #:required-argument
+   ))
+(in-package :cmucl-compat)
+
+#+cmu
+(defmacro required-argument ()
+  `(ext:required-argument))
+
+#-cmu
+(defun required-argument ()
+  (error "~&A required keyword argument was not supplied"))
+
+#+cmu
+(defmacro shrink-vector (vec len)
+  `(lisp::shrink-vector ,vec ,len))
+
+#-cmu
+(defmacro shrink-vector (vec len)
+  "Shrinks a vector. Optimized if vector has a fill pointer.
+Needs to be a macro to overwrite value of VEC."
+  (let ((new-vec (gensym)))
+    `(cond
+      ((adjustable-array-p ,vec)
+       (adjust-array ,vec ,len))
+      ((typep ,vec 'simple-array)
+       (let ((,new-vec (make-array ,len :element-type
+                                  (array-element-type ,vec))))
+        (dotimes (i ,len)
+          (declare (fixnum i))
+          (setf (aref ,new-vec i) (aref ,vec i)))
+        (setq ,vec ,new-vec)))
+      ((typep ,vec 'vector)
+       (setf (fill-pointer ,vec) ,len)
+       ,vec)
+      (t
+       (error "Unable to shrink vector ~S which is type-of ~S" ,vec (type-of ,vec))) 
+       )))
+
+
+
+#-cmu
+(defun make-sequence-of-type (type length)
+  "Returns a sequence of the given TYPE and LENGTH."
+  (declare (fixnum length))
+  (case type
+    (list 
+     (make-list length))
+    ((bit-vector simple-bit-vector) 
+     (make-array length :element-type '(mod 2)))
+    ((string simple-string base-string simple-base-string)
+     (make-string length))
+    (simple-vector 
+     (make-array length))
+    ((array simple-array vector)
+     (if (listp type)
+        (make-array length :element-type (cadr type))
+       (make-array length)))
+    (t
+     (make-sequence-of-type (result-type-or-lose type t) length))))
+
+
+#+cmu
+(if (fboundp 'lisp::make-sequence-of-type)
+    (defun make-sequence-of-type (type len)
+      (lisp::make-sequence-of-type type len))
+  (defun make-sequence-of-type (type len)
+    (system::make-sequence-of-type type len)))
+  
+
+#-cmu
+(defun result-type-or-lose (type nil-ok)
+  (unless (or type nil-ok)
+    (error "NIL output type invalid for this sequence function"))
+  (case type
+    ((list cons)
+     'list)
+    ((string simple-string base-string simple-base-string)
+     'string)
+    (simple-vector
+     'simple-vector)
+    (vector
+     'vector)
+    (t
+     (error "~S is a bad type specifier for sequence functions." type))
+    ))
+
+#+cmu
+(defun result-type-or-lose (type nil-ok)
+  (lisp::result-type-or-lose type nil-ok))