X-Git-Url: http://git.kpe.io/?p=clsql.git;a=blobdiff_plain;f=sql%2Floop-extension.lisp;fp=sql%2Floop-extension.lisp;h=d0f816f37da0192eadea3cdb3c5f2c35a68918a1;hp=0000000000000000000000000000000000000000;hb=279b34c9e8e28545c8f2a0959acb01d90138eeda;hpb=1f4aee256a7a46f6501f9db7798874307c88e5f7

diff --git a/sql/loop-extension.lisp b/sql/loop-extension.lisp
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+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:    loop-extension.lisp
+;;;; Purpose: Extensions to the Loop macro for CLSQL
+;;;;
+;;;; Copyright (c) 2001-2004 Kevin Rosenberg and (c) 1999-2001 Pierre R. Mai
+;;;;
+;;;; $Id$
+;;;; *************************************************************************
+
+(in-package #:cl-user)
+
+#+(or allegro sbcl)
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defpackage #:ansi-loop 
+    (:import-from #+sbcl #:sb-loop #+allegro #:excl
+		  #:loop-error
+		  #:*loop-epilogue*
+		  #:*loop-ansi-universe* 
+		  #:add-loop-path)))
+
+#+(or allegro sbcl)
+(defun ansi-loop::loop-gentemp (&optional (pref 'loopva-))
+  (gensym (string pref)))
+
+#+(or cmu scl sbcl openmcl allegro)
+(defun loop-record-iteration-path (variable data-type prep-phrases)
+  (let ((in-phrase nil)
+	(from-phrase nil))
+    (loop for (prep . rest) in prep-phrases
+	  do
+	  (case prep
+	    ((:in :of)
+	     (when in-phrase
+	       (ansi-loop::loop-error
+		"Duplicate OF or IN iteration path: ~S." (cons prep rest)))
+	     (setq in-phrase rest))
+	    ((:from)
+	     (when from-phrase
+	       (ansi-loop::loop-error
+		"Duplicate FROM iteration path: ~S." (cons prep rest)))
+	     (setq from-phrase rest))
+	    (t
+	     (ansi-loop::loop-error
+	      "Unknown preposition: ~S." prep))))
+    (unless in-phrase
+      (ansi-loop::loop-error "Missing OF or IN iteration path."))
+    (unless from-phrase
+      (setq from-phrase '(clsql:*default-database*)))
+
+    (unless (consp variable)
+      (setq variable (list variable)))
+
+    (cond
+     ;; object query
+     ((and (consp (first in-phrase))
+	   (string-equal "sql-query" (symbol-name (caar in-phrase)))
+	   (consp (second (first in-phrase)))
+	   (eq 'quote (first (second (first in-phrase))))
+	   (symbolp (second (second (first in-phrase)))))
+
+       (let ((result-var (ansi-loop::loop-gentemp
+			      'loop-record-result-))
+	     (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
+	 `(((,variable nil ,@(and data-type (list data-type)))
+	    (,result-var (clsql:query ,(first in-phrase)))
+	    (,step-var nil))
+	   ()
+	   ()
+	   ()
+	   (if (null ,result-var)
+	       t
+	       (progn
+		 (setq ,step-var (first ,result-var))
+		 (setq ,result-var (rest ,result-var))
+		 nil))
+	   (,variable ,step-var)
+	   (null ,result-var)
+	   ()
+	   (if (null ,result-var)
+	       t
+	       (progn
+		 (setq ,step-var (first ,result-var))
+		 (setq ,result-var (rest ,result-var))
+		 nil))
+	   (,variable ,step-var))))
+      
+      ((consp variable)
+       (let ((query-var (ansi-loop::loop-gentemp 'loop-record-))
+	     (db-var (ansi-loop::loop-gentemp 'loop-record-database-))
+	     (result-set-var (ansi-loop::loop-gentemp
+			      'loop-record-result-set-))
+	     (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
+	 (push `(when ,result-set-var
+		  (clsql:database-dump-result-set ,result-set-var ,db-var))
+	       ansi-loop::*loop-epilogue*)
+	 `(((,variable nil ,@(and data-type (list data-type)))
+	    (,query-var ,(first in-phrase))
+	    (,db-var ,(first from-phrase))
+	    (,result-set-var nil)
+	    (,step-var nil))
+	   ((multiple-value-bind (%rs %cols)
+		(clsql:database-query-result-set ,query-var ,db-var :result-types :auto)
+	      (setq ,result-set-var %rs ,step-var (make-list %cols))))
+	   ()
+	   ()
+	   (not (clsql:database-store-next-row ,result-set-var ,db-var ,step-var))
+	   (,variable ,step-var)
+	   (not ,result-set-var)
+	   ()
+	   (not (clsql:database-store-next-row ,result-set-var ,db-var ,step-var))
+	   (,variable ,step-var)))))))
+
+#+(or cmu scl sbcl openmcl allegro)
+(ansi-loop::add-loop-path '(record records tuple tuples)
+			  'loop-record-iteration-path
+			  ansi-loop::*loop-ansi-universe*
+			  :preposition-groups '((:of :in) (:from))
+			  :inclusive-permitted nil)
+
+#+lispworks 
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (in-package loop))
+
+#+lispworks
+(cl-user::define-loop-method (record records tuple tuples) clsql-loop-method 
+  (in of from))
+
+#+lispworks
+(defun clsql-loop-method (method-name iter-var iter-var-data-type 
+			  prep-phrases inclusive? allowed-preps 
+			  method-specific-data)
+  (declare (ignore method-name inclusive? allowed-preps method-specific-data))
+  (let ((in-phrase nil)
+	(from-phrase nil))
+    (loop for (prep . rest) in prep-phrases
+	  do
+	  (cond
+	    ((or (eq prep 'in) (eq prep 'of))
+	     (when in-phrase
+	       (error
+		"Duplicate OF or IN iteration path: ~S." (cons prep rest)))
+	     (setq in-phrase rest))
+	    ((eq prep 'from)
+	     (when from-phrase
+	       (error
+		"Duplicate FROM iteration path: ~S." (cons prep rest)))
+	     (setq from-phrase rest))
+	    (t
+	     (error
+	      "Unknown preposition: ~S." prep))))
+    (unless in-phrase
+      (error "Missing OF or IN iteration path."))
+    (unless from-phrase
+      (setq from-phrase '(clsql:*default-database*)))
+
+    (unless (consp iter-var)
+      (setq iter-var (list iter-var)))
+
+    (cond
+     ;; object query
+     ((and (consp in-phrase)
+	   (string-equal "sql-query" (symbol-name (car in-phrase)))
+	   (consp (second in-phrase))
+	   (eq 'quote (first (second in-phrase)))
+	   (symbolp (second (second in-phrase))))
+
+       (let ((result-var (gensym "LOOP-RECORD-RESULT-"))
+	     (step-var (gensym "LOOP-RECORD-STEP-")))
+	 (values
+	  t
+	  nil
+	  `(,@(mapcar (lambda (v) `(,v nil)) iter-var)
+	      (,result-var (clsql:query ,in-phrase))
+	      (,step-var nil))
+	  ()
+	  ()
+	  ()
+	  `((if (null ,result-var)
+		t
+		(progn
+		  (setq ,step-var (first ,result-var))
+		  (setq ,result-var (rest ,result-var))
+		  nil)))
+	  `(,iter-var ,step-var)
+	  `((if (null ,result-var)
+		t
+		(progn
+		  (setq ,step-var (first ,result-var))
+		  (setq ,result-var (rest ,result-var))
+		  nil)))
+	   `(,iter-var ,step-var)
+	   ()
+	   ()
+	   )))
+      
+      ((consp iter-var)
+       (let ((query-var (gensym "LOOP-RECORD-"))
+	     (db-var (gensym "LOOP-RECORD-DATABASE-"))
+	     (result-set-var (gensym "LOOP-RECORD-RESULT-SET-"))
+	     (step-var (gensym "LOOP-RECORD-STEP-")))
+	 (values
+	  t
+	  nil
+	  `(,@(mapcar (lambda (v) `(,v nil)) iter-var)
+	    (,query-var ,in-phrase)
+	    (,db-var ,(first from-phrase))
+	    (,result-set-var nil)
+	    (,step-var nil))
+	  `((multiple-value-bind (%rs %cols)
+		(clsql:database-query-result-set ,query-var ,db-var :result-types :auto)
+	      (setq ,result-set-var %rs ,step-var (make-list %cols))))
+	  ()
+	  ()
+	  `((unless (clsql:database-store-next-row ,result-set-var ,db-var ,step-var)
+	      (when ,result-set-var
+		(clsql:database-dump-result-set ,result-set-var ,db-var))
+	      t))
+	  `(,iter-var ,step-var)
+	  `((unless (clsql:database-store-next-row ,result-set-var ,db-var ,step-var)
+	      (when ,result-set-var
+		(clsql:database-dump-result-set ,result-set-var ,db-var))
+	      t))
+	  `(,iter-var ,step-var)
+	  ()
+	  ()))))))
+