;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: strings.lisp,v 1.24 2003/05/08 23:35:18 kevin Exp $
+;;;; $Id: strings.lisp,v 1.36 2003/06/07 05:45:14 kevin Exp $
;;;;
;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
;;;; *************************************************************************
-(in-package :kmrcl)
+(in-package #:kmrcl)
;;; Strings
(defun count-string-words (str)
(declare (simple-string str)
- (optimize (speed 3) (safety 0)))
+ (optimize (speed 3) (safety 0) (space 0)))
(let ((n-words 0)
(in-word nil))
(declare (fixnum n-words))
- (dotimes (i (length str))
- (let ((ch (char str i)))
- (declare (character ch))
- (if (alphanumericp ch)
- (unless in-word
- (incf n-words)
- (setq in-word t))
- (setq in-word nil))))
- n-words))
-
-#+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))
+ (do* ((len (length str))
+ (i 0 (1+ i)))
+ ((= i len) n-words)
+ (declare (fixnum i))
+ (if (alphanumericp (schar str i))
+ (unless in-word
+ (incf n-words)
+ (setq in-word t))
+ (setq in-word nil)))))
;; From Larry Hunter with modifications
(defun position-char (char string start max)
- (declare (optimize (speed 3) (safety 0))
+ (declare (optimize (speed 3) (safety 0) (space 0))
(fixnum start max) (simple-string string))
(do* ((i start (1+ i)))
((= i max) nil)
(declare (fixnum i))
(when (char= char (schar string i)) (return i))))
-(defun #-allegro delimited-string-to-list
- #+allegro my-delimited-string-to-list
- (string &optional (separator #\space) skip-terminal)
+(defun position-not-char (char string start max)
+ (declare (optimize (speed 3) (safety 0) (space 0))
+ (fixnum start max) (simple-string string))
+ (do* ((i start (1+ i)))
+ ((= i max) nil)
+ (declare (fixnum i))
+ (when (char/= char (schar string i)) (return i))))
+
+(defun 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)
(setq pos (1+ end))))
-(defun list-to-delimited-string (list &optional (separator #\space))
- (format nil (format nil "~~{~~A~~^~A~~}" separator) list))
+(defun list-to-delimited-string (list &optional (separator " "))
+ (format nil (concatenate 'string "~{~A~^" (string separator) "~}") list))
(defun string-invert (str)
"Invert case of a string"
(let ((up nil) (down nil))
(block skip
(loop for char of-type character across str do
- (cond ((upper-case-p char) (if down (return-from skip str) (setf up t)))
- ((lower-case-p char) (if up (return-from skip str) (setf down t)))))
+ (cond ((upper-case-p char)
+ (if down (return-from skip str) (setf up t)))
+ ((lower-case-p char)
+ (if up (return-from skip str) (setf down t)))))
(if up (string-downcase str) (string-upcase str)))))
(defun add-sql-quotes (s)
(defun escape-xml-string (string)
"Escape invalid XML characters"
- (substitute-chars-strings
- string '((#\& . "&") (#\> . ">") (#\< . "<") (#\" . """))))
-
+ (substitute-chars-strings string '((#\& . "&") (#\< . "<"))))
(defun make-usb8-array (len)
(make-array len :adjustable nil
vec))
(defun concat-separated-strings (separator &rest lists)
- (format nil (format nil "~~{~~A~~^~A~~}" separator) (append-sublists lists)))
+ (format nil (concatenate 'string "~{~A~^" (string separator) "~}")
+ (append-sublists lists)))
(defun only-null-list-elements-p (lst)
(or (null lst) (every #'null lst)))
(write-string elem strm)
(unless (and last-elem last-list)
(write-string separator strm)))))
+
+(defun prefixed-fixnum-string (num pchar len)
+ "Outputs a string of LEN digit with an optional initial character PCHAR.
+Leading zeros are present."
+ (declare (optimize (speed 3) (safety 0) (space 0))
+ (type fixnum num len))
+ (when pchar
+ (incf len))
+ (do* ((zero-code (char-code #\0))
+ (result (make-string len :initial-element #\0))
+ (minus? (minusp num))
+ (val (if minus? (- 0 num) num) (floor (/ val 10)))
+ (pos (1- len) (1- pos))
+ (mod (mod val 10) (mod val 10)))
+ ((or (zerop val) (minusp pos))
+ (when pchar
+ (setf (schar result 0) pchar))
+ (when minus? (setf (schar result (if pchar 1 0)) #\-))
+ result)
+ (declare (fixnum val mod zero-code pos) (simple-string result))
+ (setf (schar result pos) (code-char (+ zero-code mod)))))
+
+(defun integer-string (num len)
+ "Outputs a string of LEN digit with an optional initial character PCHAR.
+Leading zeros are present."
+ (declare (optimize (speed 3) (safety 0) (space 0))
+ (type fixnum len) (type integer num))
+ (do* ((zero-code (char-code #\0))
+ (result (make-string len :initial-element #\0))
+ (minus? (minusp num))
+ (val (if minus? (- 0 num) num) (floor (/ val 10)))
+ (pos (1- len) (1- pos))
+ (mod (mod val 10) (mod val 10)))
+ ((or (zerop val) (minusp pos))
+ (when minus? (setf (schar result 0) #\-))
+ result)
+ (declare (fixnum mod zero-code pos) (simple-string result) (integer val))
+ (setf (schar result pos) (code-char (+ zero-code mod)))))
+
+(defun fast-string-search (substr str substr-length startpos endpos)
+ "Optimized search for a substring in a simple-string"
+ (declare (simple-string substr str)
+ (fixnum substr-length startpos endpos)
+ (optimize (speed 3) (space 0) (safety 0)))
+ (do* ((pos startpos (1+ pos))
+ (lastpos (- endpos substr-length)))
+ ((> pos lastpos) nil)
+ (declare (fixnum pos lastpos))
+ (do ((i 0 (1+ i)))
+ ((= i substr-length)
+ (return-from fast-string-search pos))
+ (declare (fixnum i))
+ (unless (char= (schar str (+ i pos)) (schar substr i))
+ (return nil)))))
+
+(defun string-to-list-skip-delimiter (str &optional (delim #\space))
+ "Return a list of strings, delimited by spaces, skipping spaces."
+ (declare (simple-string str)
+ (optimize (speed 0) (space 0) (safety 0)))
+ (do* ((results '())
+ (end (length str))
+ (i (position-not-char delim str 0 end)
+ (position-not-char delim str j end))
+ (j (when i (position-char delim str i end))
+ (when i (position-char delim str i end))))
+ ((or (null i) (null j))
+ (when (and i (< i end))
+ (push (subseq str i end) results))
+ (nreverse results))
+ (declare (fixnum i j end))
+ (push (subseq str i j) results)))
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