r2914: rename .cl files

[clsql.git] / sql / loop-extension.lisp

diff --git a/sql/loop-extension.lisp b/sql/loop-extension.lisp
new file mode 100644 (file)
index 0000000..d19dfb6
--- /dev/null
+++ b/sql/loop-extension.lisp
@@ -0,0 +1,98 @@
+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          loop-extension.cl
+;;;; Purpose:       Extensions to the Loop macro for CMUCL
+;;;; Programmer:    Pierre R. Mai
+;;;;
+;;;; Copyright (c) 1999-2001 Pierre R. Mai
+;;;;
+;;;; $Id: loop-extension.lisp,v 1.1 2002/09/30 10:19:23 kevin Exp $
+;;;;
+;;;; The functions in this file were orignally distributed in the
+;;;; MaiSQL package in the file sql/sql.cl
+;;;; *************************************************************************
+
+(in-package :cl-user)
+
+;;;; MIT-LOOP extension
+
+#+cmu
+(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 '(*default-database*)))
+    (cond
+      ((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
+                (database-dump-result-set ,result-set-var ,db-var))
+              ansi-loop::*loop-epilogue*)
+        `(((,variable nil ,data-type) (,query-var ,(first in-phrase))
+           (,db-var ,(first from-phrase))
+           (,result-set-var nil)
+           (,step-var nil))
+          ((multiple-value-bind (%rs %cols)
+               (database-query-result-set ,query-var ,db-var)
+             (setq ,result-set-var %rs ,step-var (make-list %cols))))
+          ()
+          ()
+          (not (database-store-next-row ,result-set-var ,db-var ,step-var))
+          (,variable ,step-var)
+          (not ,result-set-var)
+          ()
+          (not (database-store-next-row ,result-set-var ,db-var ,step-var))
+          (,variable ,step-var))))
+      (t
+       (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-)))
+        (push `(when ,result-set-var
+                (database-dump-result-set ,result-set-var ,db-var))
+              ansi-loop::*loop-epilogue*)
+        `(((,variable nil ,data-type) (,query-var ,(first in-phrase))
+           (,db-var ,(first from-phrase))
+           (,result-set-var nil))
+          ((multiple-value-bind (%rs %cols)
+               (database-query-result-set ,query-var ,db-var)
+             (setq ,result-set-var %rs ,variable (make-list %cols))))
+          ()
+          ()
+          (not (database-store-next-row ,result-set-var ,db-var ,variable))
+          ()
+          (not ,result-set-var)
+          ()
+          (not (database-store-next-row ,result-set-var ,db-var ,variable))
+          ()))))))
+
+#+cmu
+(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)