(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
#+sbcl :weakness #+sbcl :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))