More progresses to bootstrap

[jscl.git] / test.lisp

diff --git a/test.lisp b/test.lisp
index 560a255..950841d 100644 (file)
--- a/test.lisp
+++ b/test.lisp
@@ -21,6 +21,12 @@
        (%compile-defun ',name))
      (fsetq ,name (lambda ,args ,@body))))
 
+(defmacro when (condition &rest body)
+  `(if ,condition (progn ,@body)))
+
+(defmacro unless (condition &rest body)
+  `(if ,condition nil (progn ,@body)))
+
 (defun = (x y) (= x y))
 (defun + (x y) (+ x y))
 (defun - (x y) (- x y))
@@ -41,6 +47,9 @@
 (defun cdar (x) (cdr (car x)))
 (defun cddr (x) (cdr (cdr x)))
 
+(defun list (&rest args)
+  args)
+
 (defun append (list1 list2)
   (if (null list1)
       list2
@@ -98,6 +107,25 @@
                (progn ,@(cdar clausules))
                (cond ,@(cdr clausules))))))
 
+
+(defmacro case (form &rest clausules)
+  (let ((!form (make-symbol "FORM")))
+    `(let ((,!form ,form))
+       (cond
+         ,@(mapcar (lambda (clausule)
+                     (if (eq (car clausule) t)
+                         clausule
+                         `((eql ,!form ,(car clausule))
+                           ,@(cdr clausule))))
+                   clausules)))))
+
+(defmacro ecase (form &rest clausules)
+  `(case ,form
+     ,@(append
+        clausules
+        `((t
+           (error "ECASE expression failed."))))))
+
 (defun !reduce (func list initial)
   (if (null list)
       initial
@@ -177,6 +205,34 @@
 (defun char= (x y) (= x y))
 
 
+(defun digit-char-p (x)
+  (if (and (< #\0 x) (< x #\9))
+      (- x #\0)
+      nil))
+
+(defun parse-integer (string)
+  (let ((value 0)
+        (index 0)
+        (size (string-length string)))
+    (while (< index size)
+      (setq value (+ (* value 10) (digit-char-p (char string index))))
+      (incf index))))
+
+(defun every (function seq)
+  ;; string
+  (let ((ret t)
+        (index 0)
+        (size (string-length seq)))
+    (while (and ret (< index size))
+      (unless (funcall function (char seq index))
+        (setq ret nil)))))
+
+(defun eql (x y)
+  (eq x y))
+
+(defun string= (s1 s2)
+  (equal s1 s2))
+
 ;;;; Reader
 
 ;;; It is a basic Lisp reader. It does not use advanced stuff
@@ -209,3 +265,91 @@
   (or (null ch) (whitespacep ch) (char= #\) ch) (char= #\( ch)))
 
 
+(defun read-until (stream func)
+  (let ((string "")
+        (ch))
+    (setq ch (%peek-char stream))
+    (while (not (funcall func ch))
+      (setq string (concat string (string ch)))
+      (%read-char stream)
+      (setq ch (%peek-char stream)))
+    string))
+
+(defun skip-whitespaces-and-comments (stream)
+  (let (ch)
+    (skip-whitespaces stream)
+    (setq ch (%peek-char stream))
+    (while (and ch (char= ch #\;))
+      (read-until stream (lambda (x) (char= x #\newline)))
+      (skip-whitespaces stream)
+      (setq ch (%peek-char stream)))))
+
+(defun %read-list (stream)
+  (skip-whitespaces-and-comments stream)
+  (let ((ch (%peek-char stream)))
+    (cond
+      ((char= ch #\))
+       (%read-char stream)
+       nil)
+      ((char= ch #\.)
+       (%read-char stream)
+       (skip-whitespaces-and-comments stream)
+       (prog1 (ls-read stream)
+         (unless (char= (%read-char stream) #\))
+           (error "')' was expected."))))
+      (t
+       (cons (ls-read stream) (%read-list stream))))))
+
+(defvar *eof* (make-symbol "EOF"))
+(defun ls-read (stream)
+  (skip-whitespaces-and-comments stream)
+  (let ((ch (%peek-char stream)))
+    (cond
+      ((null ch)
+       *eof*)
+      ((char= ch #\()
+       (%read-char stream)
+       (%read-list stream))
+      ((char= ch #\')
+       (%read-char stream)
+       (list 'quote (ls-read stream)))
+      ((char= ch #\`)
+       (%read-char stream)
+       (list 'backquote (ls-read stream)))
+      ((char= ch #\")
+       (%read-char stream)
+       (prog1 (read-until stream (lambda (ch) (char= ch #\")))
+         (%read-char stream)))
+      ((char= ch #\,)
+       (%read-char stream)
+       (if (eql (%peek-char stream) #\@)
+           (progn (%read-char stream) (list 'unquote-splicing (ls-read stream)))
+           (list 'unquote (ls-read stream))))
+      ((char= ch #\#)
+       (%read-char stream)
+       (ecase (%read-char stream)
+         (#\'
+          (list 'function (ls-read stream)))
+         (#\\
+          (let ((cname
+                (concat (string (%read-char stream))
+                        (read-until stream #'terminalp))))
+            (cond
+              ((string= cname "space") (char-code #\space))
+              ((string= cname "newline") (char-code #\newline))
+              (t (char-code (char cname 0))))))
+         (#\+
+          (let ((feature (read-until stream #'terminalp)))
+            (cond
+              ((string= feature "common-lisp")
+               (ls-read stream)         ;ignore
+               (ls-read stream))
+              ((string= feature "lispstrack")
+               (ls-read stream))
+              (t
+               (error "Unknown reader form.")))))))
+      (t
+       (let ((string (read-until stream #'terminalp)))
+         (if (every #'digit-char-p string)
+             (parse-integer string)
+             (intern (string-upcase string))))))))