X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Fcl.el;h=8150e1d83898cb32f200b44ec27df94d6fdfc897;hb=dff25f45a911f8a0e5c5bde4c1df0b01e7289fb4;hp=e2ec4c55372b6bf5309194703d21ff39d951ba43;hpb=762383636a99307282c2d93d26c35c046ec24da1;p=chise%2Fxemacs-chise.git.1

diff --git a/lisp/cl.el b/lisp/cl.el
index e2ec4c5..8150e1d 100644
--- a/lisp/cl.el
+++ b/lisp/cl.el
@@ -217,7 +217,7 @@ Keywords supported:  :test :test-not :key"
 (defun cl-set-substring (str start end val)
   (if end (if (< end 0) (incf end (length str)))
     (setq end (length str)))
-  (if (< start 0) (incf start str))
+  (if (< start 0) (incf start (length str)))
   (concat (and (> start 0) (substring str 0 start))
 	  val
 	  (and (< end (length str)) (substring str end))))
@@ -269,7 +269,7 @@ If FORM is not a macro call, it is returned unchanged.
 Otherwise, the macro is expanded and the expansion is considered
 in place of FORM.  When a non-macro-call results, it is returned.
 
-The second optional arg ENVIRONMENT species an environment of macro
+The second optional arg ENVIRONMENT specifies an environment of macro
 definitions to shadow the loaded ones for use in file byte-compilation."
   (let ((cl-macro-environment cl-env))
     (while (progn (setq cl-macro (funcall cl-old-macroexpand cl-macro cl-env))
@@ -319,7 +319,10 @@ definitions to shadow the loaded ones for use in file byte-compilation."
 
 (defun gensym (&optional arg)
   "Generate a new uninterned symbol.
-The name is made by appending a number to PREFIX, default \"G\"."
+The name is made by appending a number to a prefix.  If ARG is a string, it
+is the prefix, otherwise the prefix defaults to \"G\".  If ARG is an integer,
+the internal counter is reset to that number before creating the name.
+There is no way to specify both using this function."
   (let ((prefix (if (stringp arg) arg "G"))
 	(num (if (integerp arg) arg
 	       (prog1 *gensym-counter*
@@ -328,7 +331,8 @@ The name is made by appending a number to PREFIX, default \"G\"."
 
 (defun gentemp (&optional arg)
   "Generate a new interned symbol with a unique name.
-The name is made by appending a number to PREFIX, default \"G\"."
+The name is made by appending a number to ARG, default \"G\".
+If ARG is not a string, it is ignored."
   (let ((prefix (if (stringp arg) arg "G"))
 	name)
     (while (intern-soft (setq name (format "%s%d" prefix *gensym-counter*)))
@@ -337,34 +341,29 @@ The name is made by appending a number to PREFIX, default \"G\"."
 
 ;;; Numbers.
 
-(defun floatp-safe (x)
-  "Return t if OBJECT is a floating point number.
-On Emacs versions that lack floating-point support, this function
-always returns nil."
-  ;;(and (numberp x) (not (integerp x)))
-  ;; XEmacs: use floatp.  XEmacs is always compiled with
-  ;; floating-point, anyway.
-  (floatp x))
+(defun floatp-safe (object)
+  "Return t if OBJECT is a floating point number."
+  (floatp object))
 
-(defun plusp (x)
+(defun plusp (number)
   "Return t if NUMBER is positive."
-  (> x 0))
+  (> number 0))
 
-(defun minusp (x)
+(defun minusp (number)
   "Return t if NUMBER is negative."
-  (< x 0))
+  (< number 0))
 
-(defun oddp (x)
+(defun oddp (integer)
   "Return t if INTEGER is odd."
-  (eq (logand x 1) 1))
+  (eq (logand integer 1) 1))
 
-(defun evenp (x)
+(defun evenp (integer)
   "Return t if INTEGER is even."
-  (eq (logand x 1) 0))
+  (eq (logand integer 1) 0))
 
-(defun cl-abs (x)
-  "Return the absolute value of ARG."
-  (if (>= x 0) x (- x)))
+(defun cl-abs (number)
+  "Return the absolute value of NUMBER."
+  (if (>= number 0) number (- number)))
 (or (fboundp 'abs) (defalias 'abs 'cl-abs))   ; This is built-in to Emacs 19
 
 (defvar *random-state* (vector 'cl-random-state-tag -1 30 (cl-random-time)))