(in-package #:clsql-sys)
+(defmacro defaulting (&rest place-value-plist)
+ "for places and values (as an &rest plist)
+ if place-n is null set it to value-n"
+ `(progn
+ ,@(loop for (place value . rest) on place-value-plist by #'cddr
+ collect `(unless ,place (setf ,place ,value)))))
+
+(defmacro pop-n (place &optional (n 1))
+ "pops n items off of a list in place and returns their values in a new list
+
+ if n > the length of the list in place, then we return the full list,
+ setting the place to nil"
+ `(loop repeat ,n
+ while ,place
+ collect (pop ,place)))
+
+(defun %get-int (v)
+ (etypecase v
+ (string (parse-integer v :junk-allowed t))
+ (integer v)
+ (number (truncate v))))
+
+(defun dequote (it)
+ (if (and (listp it) (eql (first it) 'quote))
+ (second it)
+ it))
+
(defvar +whitespace-chars+
'(#\space #\tab #\newline #\return
;; Tested: sbcl unicode, allegrocl, openmcl,clisp use #\no-break_space
#+lispworks
(defvar +lw-has-without-preemption+
- #+lispworks6 nil
- #-lispworks6 t)
+ #-(or lispworks5 lispworks4) nil
+ #+(or lispworks5 lispworks4) t)
#+lispworks
(defvar +lw-global-lock+
(unless +lw-has-without-preemption+
(substitute-string-for-char s #\' "''"))
(defun substitute-string-for-char (procstr match-char subst-str)
-"Substitutes a string for a single matching character of a string"
- (declare (type string procstr))
- (let ((pos (position match-char procstr)))
- (if pos
- (concatenate 'string
- (subseq procstr 0 pos) subst-str
- (substitute-string-for-char
- (subseq procstr (1+ pos)) match-char subst-str))
- procstr)))
+ "Substitutes a string for a single matching character of a string"
+ (when procstr
+ (locally
+ (declare (type string procstr))
+ (let ((pos (position match-char procstr)))
+ (if pos
+ (concatenate 'string
+ (subseq procstr 0 pos) subst-str
+ (substitute-string-for-char
+ (subseq procstr (1+ pos)) match-char subst-str))
+ procstr)))))
(defun position-char (char string start max)
(cdr (assoc (string var) ext:*environment-list* :test #'equalp
:key #'string))
#+lispworks (lw:environment-variable (string var))
- #+mcl (ccl::getenv var)
+ #+ccl (ccl::getenv var)
#+sbcl (sb-ext:posix-getenv var))
(eval-when (:compile-toplevel :load-toplevel :execute)
(setq cl:*features* (delete :clsql-lowercase-reader cl:*features*)))
(defun replace-all (string part replacement &key (test #'char=) stream)
- "Returns a new string in which all the occurences of the part
+ "Returns a new string in which all the occurences of the part
is replaced with replacement. [FROM http://cl-cookbook.sourceforge.net/strings.html#manip]"
(let ((out (or stream (make-string-output-stream))))
(loop with part-length = (length part)
when pos do (write-string replacement out)
while pos)
(unless stream
- (get-output-stream-string out))))
\ No newline at end of file
+ (get-output-stream-string out))))
+
+(defun read-decimal-value (string)
+ (let* ((comma 0)
+ (dot 0)
+ (last))
+ (loop for c across string
+ do (case c
+ (#\. (incf dot) (setf last 'dot))
+ (#\, (incf comma) (setf last 'comma))))
+ (let* ((bag (if (and (eql last 'dot) (eql dot 1))
+ ".0123456789+-"
+ ",0123456789+-"))
+ (clean (with-output-to-string (out)
+ (loop for c across string
+ do (when (find c bag :test #'char=)
+ (write-char c out))))))
+ (if (and (eql last 'dot) (eql dot 1))
+ (decimals:parse-decimal-number clean)
+ (decimals:parse-decimal-number
+ clean :decimal-separator #\,)))))
+
+
+(defun filter-plist (plist &rest keys-to-remove)
+ "Returns a copy of the given plist with indicated key-value pairs
+removed. keys are searched with #'MEMBER"
+ (declare (dynamic-extent keys-to-remove))
+ (when plist
+ (loop for (k v . rest) = plist then rest
+ unless (member k keys-to-remove)
+ collect k and collect v
+ while rest)))
+
+(defmacro make-weak-hash-table (&rest args)
+ "Creates a weak hash table for use in a cache."
+ `(progn
+
+ ;;NB: These are generally used for caches that may not have an alternate
+ ;;clearing mechanism. If you are on an implementation that doesn't support
+ ;;weak hash tables then you're memory may accumulate.
+
+ #-(or sbcl allegro clisp lispworks ccl)
+ (warn "UNSAFE! use of weak hash on implementation without support. (see clsql/sql/utils.lisp to add)")
+
+ (make-hash-table
+ #+allegro :values #+allegro :weak
+ #+clisp :weak #+clisp :value
+ #+lispworks :weak-kind #+lispworks :value
+ #+sbcl :weakness #+sbcl :value
+ #+ccl :weak #+ccl :value
+ ,@args)
+ ))
+
+(defun to-slot-name (slot)
+ "try to turn what we got representing the slot into a slot name"
+ (etypecase slot
+ (symbol slot)
+ (slot-definition (slot-definition-name slot))))
+
+(defun to-class (it)
+ (etypecase it
+ (class it)
+ (symbol (find-class it))
+ (standard-object (class-of it))))
+
+(defun to-class-name (o)
+ (etypecase o
+ (symbol o)
+ (standard-class (class-name o))
+ (standard-object (class-name (class-of o)))))
+
+(defun easy-slot-value (obj slot)
+ "like slot-value except it accepts slot-names or defs
+ and returns nil when the slot is unbound"
+ (let ((n (to-slot-name slot)))
+ (when (and obj (slot-boundp obj n))
+ (slot-value obj n))))
+
+(defun (setf easy-slot-value) (new obj slot)
+ "like slot-value except it accepts slot-names or defs"
+ (setf (slot-value obj (to-slot-name slot)) new))
+
+(defun delist-if-single (x)
+ "if this is a single item in a list return it"
+ (if (and (listp x) (= 1 (length x)))
+ (first x)
+ x))
projects / clsql.git / blobdiff