;; You should have received a copy of the GNU General Public License
;; along with JSCL. If not, see <http://www.gnu.org/licenses/>.
+(/debug "loading string.lisp!")
+
+(defun stringp (s)
+ (stringp s))
+
+(defun string-length (string)
+ (storage-vector-size string))
+
+(defun make-string (n &key initial-element)
+ (make-array n :element-type 'character :initial-element initial-element))
+
+(defun char (string index)
+ (unless (stringp string) (error "~S is not a string" string))
+ (storage-vector-ref string index))
+
(defun string (x)
(cond ((stringp x) x)
((symbolp x) (symbol-name x))
- (t (char-to-string x))))
+ (t (make-string 1 :initial-element x))))
-(defun string= (s1 s2)
- (let ((n (length s1)))
- (when (= (length s2) n)
- (dotimes (i n t)
- (unless (char= (char s1 i) (char s2 i))
+(defun string= (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (let* ((s1 (string s1))
+ (s2 (string s2))
+ (n1 (length s1))
+ (n2 (length s2))
+ (end1 (or end1 n1))
+ (end2 (or end2 n2)))
+ (when (= (- end2 start2) (- end1 start1))
+ (dotimes (i (- end2 start2) t)
+ (unless (char= (char s1 (+ start1 i)) (char s2 (+ start2 i)))
(return-from string= nil))))))
-(defun string< (s1 s2)
- (let ((len-1 (length s1))
- (len-2 (length s2)))
- (cond ((= len-2 0) nil)
- ((= len-1 0) 0)
- (t (dotimes (i len-1 nil)
- (when (char< (char s1 i) (char s2 i))
- (return-from string< i)))))))
-
+(defun string/= (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (let* ((s1 (string s1))
+ (s2 (string s2))
+ (n1 (length s1))
+ (n2 (length s2))
+ (end1 (or end1 n1))
+ (end2 (or end2 n2)))
+ (dotimes (i (max (- end1 start1) (- end2 start2)) nil)
+ (when (or (>= (+ start1 i) n1)
+ (>= (+ start2 i) n2))
+ (return-from string/= (+ start1 i)))
+ (unless (char= (char s1 (+ start1 i)) (char s2 (+ start2 i)))
+ (return-from string/= (+ start1 i))))))
+
+
+(defun compare-strings (s1 s2 start1 end1 start2 end2 char-eq char-lt if-eq if-a-sub-b if-b-sub-a)
+ ;; step through strings S1 and S2, using bounds START1 END1 START2 END2.
+ ;; using character comparison functions CHAR-EQ (equality) and CHAR-LT (less-than),
+ ;; find the first difference, if any, and return its index.
+ ;; the IF-* params say what to do if the strings are equal, or a strict prefix substring of the other:
+ ;; if T, it returns the first different index. if NIL, it returns NIL.
+ (let* ((s1 (string s1))
+ (s2 (string s2))
+ (end1 (or end1 (length s1)))
+ (end2 (or end2 (length s2)))
+ (len-1 (- end1 start1))
+ (len-2 (- end2 start2)))
+ (dotimes (i (max len-1 len-2) (if if-eq (+ start1 i) nil))
+ (when (= i len-1) ;; ran off the end of s1
+ (return-from compare-strings (if if-a-sub-b (+ start1 i) nil)))
+ (when (= i len-2) ;; ran off the end of s2
+ (return-from compare-strings (if if-b-sub-a (+ start1 i) nil)))
+ (let ((c1 (char s1 (+ start1 i)))
+ (c2 (char s2 (+ start2 i))))
+ (when (not (funcall char-eq c1 c2)) ;; found a difference
+ (return-from compare-strings
+ (if (not (funcall char-lt c1 c2))
+ (+ start1 i)
+ nil)))))))
+
+(defun string< (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char= #'char> nil t nil))
+
+(defun string> (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char= #'char< nil nil t))
+
+(defun string<= (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char= #'char> t t nil))
+
+(defun string>= (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char= #'char< t nil t))
+
+(defun string-lessp (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char-equal #'char-greaterp nil t nil))
+
+(defun string-greaterp (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char-equal #'char-lessp nil nil t))
+
+(defun string-not-greaterp (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char-equal #'char-greaterp t t nil))
+
+(defun string-not-lessp (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (compare-strings s1 s2 start1 end1 start2 end2
+ #'char-equal #'char-lessp t nil t))
+
(define-setf-expander char (string index)
(let ((g!string (gensym))
(g!index (gensym))
(list g!value)
`(aset ,g!string ,g!index ,g!value)
`(char ,g!string ,g!index))))
+
+
+(defun concat (&rest strs)
+ (flet ((concat-two (str1 str2)
+ (concatenate-storage-vector str1 str2)))
+ (!reduce #'concat-two strs "")))
+
+
+(defun string-upcase (string &key (start 0) end)
+ (let* ((string (string string))
+ (new (make-string (length string))))
+ (dotimes (i (length string) new)
+ (aset new i
+ (if (and (or (null start) (>= i start))
+ (or (null end) (< i end)))
+ (char-upcase (char string i))
+ (char string i))))))
+
+(defun nstring-upcase (string &key (start 0) end)
+ (let ((end (or end (length string))))
+ (dotimes (i (- end start) string)
+ (aset string (+ start i)
+ (char-upcase (char string (+ start i)))))))
+
+(defun string-downcase (string &key (start 0) end)
+ (let* ((string (string string))
+ (new (make-string (length string))))
+ (dotimes (i (length string) new)
+ (aset new i
+ (if (and (or (null start) (>= i start))
+ (or (null end) (< i end)))
+ (char-downcase (char string i))
+ (char string i))))))
+
+(defun nstring-downcase (string &key (start 0) end)
+ (let ((end (or end (length string))))
+ (dotimes (i (- end start) string)
+ (aset string (+ start i)
+ (char-downcase (char string (+ start i)))))))
+
+(defun string-capitalize (string &key (start 0) end)
+ (let* ((string (string string))
+ (new (make-string (length string)))
+ (just-saw-alphanum-p nil))
+ (dotimes (i (length string) new)
+ (aset new i
+ (cond ((or (and start (< i start))
+ (and end (> i end)))
+ (char string i))
+ ((or (= i start)
+ (not just-saw-alphanum-p))
+ (char-upcase (char string i)))
+ (t
+ (char-downcase (char string i)))))
+ (setq just-saw-alphanum-p (alphanumericp (char string i))))))
+
+(defun nstring-capitalize (string &key (start 0) end)
+ (let ((end (or end (length string)))
+ (just-saw-alphanum-p nil))
+ (dotimes (i (- end start) string)
+ (aset string (+ start i)
+ (if (or (zerop i)
+ (not just-saw-alphanum-p))
+ (char-upcase (char string (+ start i)))
+ (char-downcase (char string (+ start i)))))
+ (setq just-saw-alphanum-p (alphanumericp (char string (+ start i)))))))
+
+(defun string-equal (s1 s2 &key start1 end1 start2 end2)
+ (let* ((s1 (string s1))
+ (s2 (string s2))
+ (n1 (length s1))
+ (n2 (length s2))
+ (start1 (or start1 0))
+ (end1 (or end1 n1))
+ (start2 (or start2 0))
+ (end2 (or end2 n2)))
+ (when (= (- end2 start2) (- end1 start1))
+ (dotimes (i (- end2 start2) t)
+ (unless (char-equal (char s1 (+ start1 i)) (char s2 (+ start2 i)))
+ (return-from string-equal nil))))))
+
+;; just like string/= but with char-equal instead of char=
+(defun string-not-equal (s1 s2 &key (start1 0) end1 (start2 0) end2)
+ (let* ((s1 (string s1))
+ (s2 (string s2))
+ (n1 (length s1))
+ (n2 (length s2))
+ (end1 (or end1 n1))
+ (end2 (or end2 n2)))
+ (dotimes (i (max (- end1 start1) (- end2 start2)) nil)
+ (when (or (>= (+ start1 i) n1)
+ (>= (+ start2 i) n2))
+ (return-from string-not-equal (+ start1 i)))
+ (unless (char-equal (char s1 (+ start1 i)) (char s2 (+ start2 i)))
+ (return-from string-not-equal (+ start1 i))))))
+
+(defun string-trim (character-bag string)
+ (string-left-trim character-bag (string-right-trim character-bag string)))
+
+(defun string-left-trim (character-bag string)
+ (let* ((string (string string))
+ (n (length string))
+ (start (or (position-if-not (lambda (c) (find c character-bag)) string) n)))
+ (subseq string start)))
+
+(defun string-right-trim (character-bag string)
+ (let* ((string (string string))
+ (n (length string)))
+ (dotimes (i n "")
+ (when (not (find (char string (- n i 1)) character-bag))
+ (return-from string-right-trim (subseq string 0 (- n i)))))))
projects / jscl.git / blobdiff