1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: sqlite-api-uffi.lisp
6 ;;;; Purpose: Low-level SQLite interface using UFFI
7 ;;;; Programmers: Aurelio Bignoli and Kevin Rosenberg
8 ;;;; Date Started: Nov 2003
12 ;;;; This file, part of CLSQL, is Copyright (c) 2003 by Aurelio Bignoli
14 ;;;; CLSQL users are granted the rights to distribute and use this software
15 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
16 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
17 ;;;; *************************************************************************
19 (in-package #:cl-user)
22 (:use #:common-lisp #:uffi)
27 #:sqlite-error-message
41 #:sqlite-version ; Defined as constant.
42 #:sqlite-encoding ; Defined as constant.
43 #:sqlite-last-insert-rowid
45 ;;; Utility functions.
55 #:sqlite-row-pointer-type
60 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
62 ;;;; Return values for sqlite_exec() and sqlite_step()
64 (defconstant SQLITE-OK 0 "Successful result")
65 (defconstant SQLITE-ERROR 1 "SQL error or missing database")
66 (defconstant SQLITE-ROW 100 "sqlite_step() has another row ready")
67 (defconstant SQLITE-DONE 101 "sqlite_step() has finished executing")
69 (defvar +null-char-char-pointer+ (make-null-pointer 'string-pointer))
71 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
75 (define-condition sqlite-error ()
76 ((message :initarg :message :reader sqlite-error-message :initform "")
77 (code :initarg :code :reader sqlite-error-code))
78 (:report (lambda (condition stream)
79 (let ((code (sqlite-error-code condition)))
80 (format stream "SQLite error [~A]: ~A"
81 code (sqlite-error-message condition))))))
83 (defun signal-sqlite-error (code &optional message)
85 (make-condition 'sqlite-error
89 (sqlite-error-string code)))))
90 (unless (signal condition)
91 (invoke-debugger condition))))
93 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
95 ;;;; Foreign types definitions.
97 (def-foreign-type errmsg (* :char))
98 (def-foreign-type sqlite-db :pointer-void)
99 (def-foreign-type sqlite-vm :pointer-void)
100 (def-foreign-type string-pointer (* (* :char)))
101 (def-foreign-type sqlite-row-pointer (* string-pointer))
103 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
105 ;;; Lisp types used in declarations.
107 (def-type sqlite-db-type sqlite-db)
108 (def-type sqlite-row string-pointer)
109 (def-type sqlite-row-pointer-type (* string-pointer))
110 (def-type sqlite-vm-pointer (* sqlite-vm))
112 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
114 ;;;; Library functions.
116 (defmacro def-sqlite-function (name args &key (returning :void))
117 `(def-function ,name ,args
119 :returning ,returning))
122 "sqlite_error_string"
126 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
130 (declaim (inline %open))
132 ("sqlite_open" %open)
135 (error-message (* errmsg)))
136 :returning sqlite-db)
138 (declaim (inline sqlite-close))
143 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
147 (declaim (inline %compile))
149 ("sqlite_compile" %compile)
152 (sql-tail (* (* :char)))
154 (error-message (* errmsg)))
157 (declaim (inline %step))
159 ("sqlite_step" %step)
162 (cols (* (* (* :char))))
163 (col-names (* (* (* :char)))))
166 (declaim (inline %finalize))
168 ("sqlite_finalize" %finalize)
170 (error-message (* errmsg)))
173 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
177 (declaim (inline sqlite-last-insert-rowid))
179 "sqlite_last_insert_rowid"
183 (declaim (inline %get-table))
185 ("sqlite_get_table" %get-table)
188 (result (* (* (* :char))))
191 (error-message (* errmsg)))
194 (declaim (inline %free-table))
196 ("sqlite_free_table" %free-table)
197 ((rows :pointer-void)))
199 (declaim (inline sqlite-libversion))
205 (declaim (inline sqlite-libencoding))
211 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
213 ;;;; Wrapper functions.
215 (defparameter sqlite-version (sqlite-libversion))
216 (defparameter sqlite-encoding (sqlite-libencoding))
218 (defun sqlite-open (db-name &optional (mode 0))
219 (with-cstring (db-name-native db-name)
220 (let ((db (%open db-name-native mode +null-char-char-pointer+)))
221 (if (null-pointer-p db)
222 (signal-sqlite-error SQLITE-ERROR
223 (format nil "unable to open ~A" db-name))
226 (defun sqlite-compile (db sql)
227 (with-cstring (sql-native sql)
228 (let ((vm (allocate-foreign-object 'sqlite-vm)))
229 (with-foreign-object (sql-tail '(* :char))
230 (let ((result (%compile db sql-native sql-tail vm +null-char-char-pointer+)))
231 (if (= result SQLITE-OK)
234 (free-foreign-object vm)
235 (signal-sqlite-error result))))))))
237 (defun sqlite-step (vm)
238 (declare (type sqlite-vm-pointer vm))
239 (with-foreign-object (cols-n :int)
240 (let ((cols (allocate-foreign-object '(* (* :char))))
241 (col-names (allocate-foreign-object '(* (* :char)))))
242 (declare (type sqlite-row-pointer-type cols col-names))
243 (let ((result (%step (deref-pointer vm 'sqlite-vm)
244 cols-n cols col-names)))
246 ((= result SQLITE-ROW)
247 (let ((n (deref-pointer cols-n :int)))
248 (values n cols col-names)))
249 ((= result SQLITE-DONE)
250 (free-foreign-object cols)
251 (free-foreign-object col-names)
252 (values 0 +null-char-char-pointer+ +null-char-char-pointer+))
254 (free-foreign-object cols)
255 (free-foreign-object col-names)
256 (signal-sqlite-error result)))))))
258 (defun sqlite-finalize (vm)
259 (declare (type sqlite-vm-pointer vm))
260 (let ((result (%finalize (deref-pointer vm 'sqlite-vm) +null-char-char-pointer+)))
261 (if (= result SQLITE-OK)
263 (free-foreign-object vm)
265 (signal-sqlite-error result))))
267 (defun sqlite-get-table (db sql)
268 (declare (type sqlite-db-type db))
269 (with-cstring (sql-native sql)
270 (let ((rows (allocate-foreign-object '(* (* :char)))))
271 (declare (type sqlite-row-pointer-type rows))
272 (with-foreign-object (rows-n :int)
273 (with-foreign-object (cols-n :int)
274 (let ((result (%get-table db sql-native rows rows-n cols-n +null-char-char-pointer+)))
275 (if (= result SQLITE-OK)
276 (let ((cn (deref-pointer cols-n :int))
277 (rn (deref-pointer rows-n :int)))
280 (free-foreign-object rows)
281 (signal-sqlite-error result)))))))))
283 (declaim (inline sqlite-free-table))
284 (defun sqlite-free-table (table)
285 (declare (type sqlite-row-pointer-type table))
286 (%free-table (deref-pointer table 'sqlite-row-pointer)))
288 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
290 ;;;; Utility functions.
292 (declaim (inline make-null-row))
293 (defun make-null-row ()
294 +null-char-char-pointer)
296 (declaim (inline make-null-vm))
297 (defun make-null-vm ()
298 (uffi:make-null-pointer 'sqlite-vm))
300 (declaim (inline null-row-p))
301 (defun null-row-p (row)
302 (null-pointer-p row))
304 (declaim (inline sqlite-aref))
305 (defun sqlite-aref (a n)
306 (declare (type sqlite-row-pointer-type a))
307 (convert-from-foreign-string
308 (deref-array (deref-pointer a 'sqlite-row-pointer) '(:array (* :char)) n)))
310 (declaim (inline sqlite-free-row))
311 (defun sqlite-free-row (row)
312 (declare (type sqlite-row-pointer-type row))
313 (free-foreign-object row))