-;;;; -*- 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.cl,v 1.1 2002/03/23 14:04:49 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)