X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fstring.lisp;h=411c638be89569d6e9c3e2eeeab4423800761f2b;hb=1be162e1ed191a148ef302a3b1ee93eae6700890;hp=1aa09ace78794dcfd7cdb3017ca422f318107124;hpb=26af6f56fc615a008c3f433265ccecbfce815a61;p=jscl.git

diff --git a/src/string.lisp b/src/string.lisp
index 1aa09ac..411c638 100644
--- a/src/string.lisp
+++ b/src/string.lisp
@@ -13,24 +13,67 @@
 ;; You should have received a copy of the GNU General Public License
 ;; along with JSCL.  If not, see <http://www.gnu.org/licenses/>.
 
+(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)))
+  (let* ((s1 (string s1))
+         (s2 (string s2))
+         (n (length s1)))
     (when (= (length s2) n)
       (dotimes (i n t)
         (unless (char= (char s1 i) (char s2 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))
+               (when (and (= i (1- len-1)) (> len-2 len-1))
+                 (return-from string< (1+ i))))))))
+
 (define-setf-expander char (string index)
   (let ((g!string (gensym))
         (g!index (gensym))
         (g!value (gensym)))
-    (list (list g!string g!index)
-          (list string index)
-          (list g!value)
-          `(aset ,g!string ,g!index ,g!value)
-          `(char ,g!string ,g!index))))
+    (values (list g!string g!index)
+            (list string index)
+            (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)
+  (let ((new (make-string (length string))))
+    (dotimes (i (length string) new)
+      (aset new i (char-upcase (char string i))))))
+
+(defun string-downcase (string)
+  (let ((new (make-string (length string))))
+    (dotimes (i (length string) new)
+      (aset new i (char-downcase (char string i))))))