;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: strings.lisp,v 1.2 2002/11/04 18:02:13 kevin Exp $
+;;;; $Id: strings.lisp,v 1.18 2003/05/05 19:54:14 kevin Exp $
;;;;
;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(in-package :kmrcl)
-(declaim (optimize (speed 3) (safety 1) (compilation-speed 0) (debug 3)))
;;; Strings
(defmacro string-append (outputstr &rest args)
`(setq ,outputstr (concatenate 'string ,outputstr ,@args)))
-(defmacro string-field-append (outputstr &rest args)
- `(setq ,outputstr (concatenate 'string ,outputstr ,@args)))
-
(defun list-to-string (lst)
"Converts a list to a string, doesn't include any delimiters between elements"
(format nil "~{~A~}" lst))
(setq in-word nil))))
n-words))
-#+excl
-(defun delimited-string-to-list (string &optional (separator #\space))
+#+allegro
+(defun delimited-string-to-list (string &optional (separator #\space) skip-terminal)
+ "Uses allegro's internal function since that benchmarks faster than
+my algorithm. Does allegro use assembly?"
+ (declare (string string) (character separator))
+ (when skip-terminal
+ (let ((len (length string)))
+ (when (and (plusp len) (char= separator (char string (1- len))))
+ (setq string (subseq string 0 (1- len))))))
(excl:delimited-string-to-list string separator))
-#-excl
-(defun delimited-string-to-list (sequence &optional (separator #\space))
- "Split a string by a delimitor"
- (loop
- with start = 0
- for end = (position separator sequence :start start)
- collect (subseq sequence start end)
- until (null end)
- do
- (setf start (1+ end))))
-
-#+excl
-(defun list-to-delimited-string (list &optional (separator #\space))
- (excl:list-to-delimited-string list separator))
+(defun #-allegro delimited-string-to-list
+ #+allegro my-delimited-string-to-list
+ (string &optional (separator #\space) skip-terminal)
+ "split a string with delimiter"
+ (declare (optimize (speed 3) (safety 0) (space 0) (compilation-speed 0))
+ (type string string)
+ (type character separator))
+ (do* ((len (length string))
+ (output '())
+ (pos 0)
+ (end (position separator string :start pos :end len)
+ (position separator string :start pos :end len))
+ (previous nil))
+ ((null end)
+ (cond
+ ((null previous)
+ (list string))
+ (t
+ (incf previous)
+ (if (< previous len)
+ (push (subseq string previous) output)
+ (unless skip-terminal
+ (push "" output)))
+ (nreverse output))))
+ (declare (type fixnum pos len)
+ (type (or null fixnum) end previous))
+ (push (subseq string pos end) output)
+ (setq previous end)
+ (setq pos (1+ end))))
+
-#-excl
(defun list-to-delimited-string (list &optional (separator #\space))
- (let ((output (when list (format nil "~A" (car list)))))
- (dolist (obj (rest list))
- (setq output (concatenate 'string output
- (format nil "~A" separator)
- (format nil "~A" obj))))
- output))
+ (format nil (format nil "~~{~~A~~^~A~~}" separator) list))
(defun string-invert (str)
"Invert case of a string"
(defun substitute-string-for-char (procstr match-char subst-str)
"Substitutes a string for a single matching character of a string"
- (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)))
+ (substitute-chars-strings procstr (list (cons match-char subst-str))))
(defun string-substitute (string substring replacement-string)
"String substitute by Larry Hunter. Obtained from Google"
replacement-string))
(setq last-end (+ next-start substring-length)))))
-
(defun string-trim-last-character (s)
-"Return the string less the last character"
- (subseq s 0 (1- (length s))))
+ "Return the string less the last character"
+ (let ((len (length s)))
+ (if (plusp len)
+ (subseq s 0 (1- len))
+ s)))
+
+(defun nstring-trim-last-character (s)
+ "Return the string less the last character"
+ (let ((len (length s)))
+ (if (plusp len)
+ (nsubseq s 0 (1- len))
+ s)))
(defun string-hash (str &optional (bitmask 65535))
(let ((hash 0))
(defun whitespace? (c)
(declare (character c))
- (declare (optimize (speed 3) (safety 0)))
- (or (char= c #\Space) (char= c #\Tab) (char= c #\Return) (char= c #\Linefeed)))
+ (locally (declare (optimize (speed 3) (safety 0)))
+ (or (char= c #\Space) (char= c #\Tab) (char= c #\Return)
+ (char= c #\Linefeed))))
(defun not-whitespace? (c)
(not (whitespace? c)))
(when (stringp str)
(null (find-if #'not-whitespace? str))))
+(defun replaced-string-length (str repl-alist)
+ (declare (string str))
+ (let* ((orig-len (length str))
+ (new-len orig-len))
+ (declare (fixnum orig-len new-len))
+ (dotimes (i orig-len)
+ (declare (fixnum i))
+ (let* ((c (char str i))
+ (match (assoc c repl-alist :test #'char=)))
+ (declare (character c))
+ (when match
+ (incf new-len (1- (length (cdr match)))))))
+ new-len))
+
+(defun substitute-chars-strings (str repl-alist)
+ "Replace all instances of a chars with a string. repl-alist is an assoc
+list of characters and replacement strings."
+ (declare (simple-string str))
+ (do* ((orig-len (length str))
+ (new-string (make-string (replaced-string-length str repl-alist)))
+ (spos 0 (1+ spos))
+ (dpos 0))
+ ((>= spos orig-len)
+ new-string)
+ (declare (fixnum spos dpos) (simple-string new-string))
+ (let* ((c (char str spos))
+ (match (assoc c repl-alist :test #'char=)))
+ (declare (character c))
+ (if match
+ (let* ((subst (cdr match))
+ (len (length subst)))
+ (declare (fixnum len))
+ (dotimes (j len)
+ (declare (fixnum j))
+ (setf (char new-string dpos) (char subst j))
+ (incf dpos)))
+ (progn
+ (setf (char new-string dpos) c)
+ (incf dpos))))))
+
+(defun escape-xml-string (string)
+ "Escape invalid XML characters"
+ (substitute-chars-strings
+ string '((#\& . "&") (#\> . ">") (#\< . "<") (#\" . """))))
+
+
+(defun make-usb8-array (len)
+ (make-array len :adjustable nil
+ :fill-pointer nil
+ :element-type '(unsigned-byte 8)))
+
+(defun usb8-array-to-string (vec)
+ (let* ((len (length vec))
+ (str (make-string len)))
+ (declare (fixnum len)
+ (simple-string str)
+ (optimize (speed 3)))
+ (dotimes (i len)
+ (declare (fixnum i))
+ (setf (schar str i) (code-char (aref vec i))))
+ str))
+
+(defun string-to-usb8-array (str)
+ (let* ((len (length str))
+ (vec (make-usb8-array len)))
+ (declare (fixnum len)
+ (type (array fixnum (*)) vec)
+ (optimize (speed 3)))
+ (dotimes (i len)
+ (declare (fixnum i))
+ (setf (aref vec i) (char-code (schar str i))))
+ vec))
+
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