1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: loop-extension.lisp
6 ;;;; Purpose: Extensions to the Loop macro for CLSQL
8 ;;;; Copyright (c) 2001-2004 Kevin Rosenberg and (c) 1999-2001 Pierre R. Mai
11 ;;;; *************************************************************************
13 (in-package #:cl-user)
16 (eval-when (:compile-toplevel :load-toplevel :execute)
17 (defpackage #:ansi-loop
18 (:import-from #+sbcl #:sb-loop #+allegro #:excl
21 #:*loop-ansi-universe*
25 (defun ansi-loop::loop-gentemp (&optional (pref 'loopva-))
26 (gensym (string pref)))
28 #+(or cmu scl sbcl openmcl allegro)
29 (defun loop-record-iteration-path (variable data-type prep-phrases)
32 (loop for (prep . rest) in prep-phrases
37 (ansi-loop::loop-error
38 "Duplicate OF or IN iteration path: ~S." (cons prep rest)))
39 (setq in-phrase rest))
42 (ansi-loop::loop-error
43 "Duplicate FROM iteration path: ~S." (cons prep rest)))
44 (setq from-phrase rest))
46 (ansi-loop::loop-error
47 "Unknown preposition: ~S." prep))))
49 (ansi-loop::loop-error "Missing OF or IN iteration path."))
51 (setq from-phrase '(clsql-base:*default-database*)))
53 (unless (consp variable)
54 (setq variable (list variable)))
57 ;; Object query resulting in a list of returned object instances
58 ((and (consp (first in-phrase))
59 (consp (second (first in-phrase)))
60 (eq 'quote (first (second (first in-phrase))))
61 (symbolp (second (second (first in-phrase)))))
63 (let ((result-var (ansi-loop::loop-gentemp
64 'loop-record-result-))
65 (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
66 `(((,variable nil ,@(and data-type (list data-type)))
67 (,result-var ,(first in-phrase))
72 (if (null ,result-var)
75 (setq ,step-var (first ,result-var))
76 (setq ,result-var (rest ,result-var))
81 (if (null ,result-var)
84 (setq ,step-var (first ,result-var))
85 (setq ,result-var (rest ,result-var))
87 (,variable ,step-var))))
90 (let ((query-var (ansi-loop::loop-gentemp 'loop-record-))
91 (db-var (ansi-loop::loop-gentemp 'loop-record-database-))
92 (result-set-var (ansi-loop::loop-gentemp
93 'loop-record-result-set-))
94 (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
95 (push `(when ,result-set-var
96 (clsql-base:database-dump-result-set ,result-set-var ,db-var))
97 ansi-loop::*loop-epilogue*)
98 `(((,variable nil ,@(and data-type (list data-type)))
99 (,query-var ,(first in-phrase))
100 (,db-var ,(first from-phrase))
101 (,result-set-var nil)
103 ((multiple-value-bind (%rs %cols)
104 (clsql-base:database-query-result-set ,query-var ,db-var :result-types :auto)
105 (setq ,result-set-var %rs ,step-var (make-list %cols))))
108 (not (clsql-base:database-store-next-row ,result-set-var ,db-var ,step-var))
109 (,variable ,step-var)
110 (not ,result-set-var)
112 (not (clsql-base:database-store-next-row ,result-set-var ,db-var ,step-var))
113 (,variable ,step-var)))))))
115 #+(or cmu scl sbcl openmcl allegro)
116 (ansi-loop::add-loop-path '(record records tuple tuples)
117 'loop-record-iteration-path
118 ansi-loop::*loop-ansi-universe*
119 :preposition-groups '((:of :in) (:from))
120 :inclusive-permitted nil)
123 (eval-when (:compile-toplevel :load-toplevel :execute)
127 (cl-user::define-loop-method (record records tuple tuples) clsql-loop-method
131 (defun clsql-loop-method (method-name iter-var iter-var-data-type
132 prep-phrases inclusive? allowed-preps
133 method-specific-data)
134 (declare (ignore method-name inclusive? allowed-preps method-specific-data))
135 (let ((in-phrase nil)
137 (loop for (prep . rest) in prep-phrases
140 ((or (eq prep 'in) (eq prep 'of))
143 "Duplicate OF or IN iteration path: ~S." (cons prep rest)))
144 (setq in-phrase rest))
148 "Duplicate FROM iteration path: ~S." (cons prep rest)))
149 (setq from-phrase rest))
152 "Unknown preposition: ~S." prep))))
154 (error "Missing OF or IN iteration path."))
156 (setq from-phrase '(clsql-base:*default-database*)))
158 (unless (consp iter-var)
159 (setq iter-var (list iter-var)))
162 ;; Object query resulting in a list of returned object instances
163 ((and (string-equal "select" (symbol-name (car in-phrase)))
164 (eq 'quote (first (second in-phrase)))
165 (symbolp (second (second in-phrase))))
167 (let ((result-var (gensym "LOOP-RECORD-RESULT-"))
168 (step-var (gensym "LOOP-RECORD-STEP-")))
172 `(,@(mapcar (lambda (v) `(,v nil)) iter-var)
173 (,result-var ,in-phrase)
178 `((if (null ,result-var)
181 (setq ,step-var (first ,result-var))
182 (setq ,result-var (rest ,result-var))
184 `(,iter-var ,step-var)
185 `((if (null ,result-var)
188 (setq ,step-var (first ,result-var))
189 (setq ,result-var (rest ,result-var))
191 `(,iter-var ,step-var)
197 (let ((query-var (gensym "LOOP-RECORD-"))
198 (db-var (gensym "LOOP-RECORD-DATABASE-"))
199 (result-set-var (gensym "LOOP-RECORD-RESULT-SET-"))
200 (step-var (gensym "LOOP-RECORD-STEP-")))
204 `(,@(mapcar (lambda (v) `(,v nil)) iter-var)
205 (,query-var ,in-phrase)
206 (,db-var ,(first from-phrase))
207 (,result-set-var nil)
209 `((multiple-value-bind (%rs %cols)
210 (clsql-base:database-query-result-set ,query-var ,db-var :result-types :auto)
211 (setq ,result-set-var %rs ,step-var (make-list %cols))))
214 `((unless (clsql-base:database-store-next-row ,result-set-var ,db-var ,step-var)
215 (when ,result-set-var
216 (clsql-base:database-dump-result-set ,result-set-var ,db-var))
218 `(,iter-var ,step-var)
219 `((unless (clsql-base:database-store-next-row ,result-set-var ,db-var ,step-var)
220 (when ,result-set-var
221 (clsql-base:database-dump-result-set ,result-set-var ,db-var))
223 `(,iter-var ,step-var)