X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=lispstrack.lisp;h=b467d2109c144d8203275d0009cf62deb074de9f;hb=64bbc0eee76aae8e023a7ed0b4a66f5d91bed684;hp=1419eb95f7c5e9a9bbc16785deb34986ebd5c5c2;hpb=d439d330be4452ee5e9b3863e342c3ae42ee30d7;p=jscl.git

diff --git a/lispstrack.lisp b/lispstrack.lisp
index 1419eb9..b467d21 100644
--- a/lispstrack.lisp
+++ b/lispstrack.lisp
@@ -1,52 +1,176 @@
 ;;; Utils
 
+(defmacro while (condition &body body)
+  `(do ()
+       ((not ,condition))
+     ,@body))
+
 ;;; simplify me, please
 (defun concat (&rest strs)
   (reduce (lambda (s1 s2) (concatenate 'string s1 s2))
           strs
           :initial-value ""))
 
+
+(let ((counter 0))
+  (defun make-var-binding (symbol)
+    (cons symbol (format nil "v~d" (incf counter)))))
+
+(let ((counter 0))
+  (defun make-func-binding (symbol)
+    (cons symbol (format nil "f~d" (incf counter)))))
+
+
+;;; Concatenate a list of strings, with a separator
+(defun join (list separator)
+  (cond
+    ((null list)
+     "")
+    ((null (cdr list))
+     (car list))
+    (t
+     (concat (car list)
+             separator
+             (join (cdr list) separator)))))
+
 ;;; Compiler
 
 (defvar *compilations* nil)
 
+(defun ls-compile-sexps (sexps env fenv)
+  (concat (join (mapcar (lambda (x)
+                          (concat (ls-compile x env fenv) ";"))
+                        sexps)
+                ";
+")))
+
+(defun ls-compile-block (sexps env fenv)
+  (concat (ls-compile-sexps (butlast sexps) env fenv)
+          "return " (ls-compile (car (last sexps)) env fenv) ";"))
+
+
+(defun extend-env (args env)
+  (append (mapcar #'make-var-binding args) env))
+
+(defparameter *env* '())
+(defparameter *fenv* '())
+
+(defun ls-lookup (symbol env)
+  (let ((binding (assoc symbol env)))
+    (and binding (format nil "~a" (cdr binding)))))
+
+(defun lookup-variable (symbol env)
+  (or (ls-lookup symbol env)
+      (ls-lookup symbol *env*)
+      (error "Undefined variable `~a'"  symbol)))
+
+(defun lookup-function (symbol env)
+  (or (ls-lookup symbol env)
+      (ls-lookup symbol *fenv*)
+      (error "Undefined function `~a'"  symbol)))
+
 (defmacro define-compilation (name args &body body)
-  `(push (list ',name (lambda (env ,@args) ,@body))
+  ;; Creates a new primitive `name' with parameters args and
+  ;; @body. The body can access to the local environment through the
+  ;; variable ENV.
+  `(push (list ',name (lambda (env fenv ,@args) ,@body))
          *compilations*))
 
 (define-compilation if (condition true false)
   (format nil "((~a)? (~a) : (~a))"
-          (ls-compile condition env)
-          (ls-compile true env)
-          (ls-compile false env)))
+          (ls-compile condition env fenv)
+          (ls-compile true env fenv)
+          (ls-compile false env fenv)))
 
 (define-compilation lambda (args &rest body)
-  (concat "(function ("
-          (format nil "~{V_~a~^, ~}" args)
-          "){ "
-          (ls-compile-block body env)
-          "})
-"))
+  (let ((new-env (extend-env args env)))
+    (concat "(function ("
+	    (join (mapcar (lambda (x) (lookup-variable x new-env))
+                          args)
+                  ",")
+	    "){
+"
+	    (ls-compile-block body new-env fenv)
+	    "
+})")))
 
-(defparameter *env* '())
-(defparameter *env-fun* '())
+(define-compilation fsetq (var val)
+  (format nil "~a = ~a" (lookup-function var fenv) (ls-compile val env fenv)))
 
-(defun ls-compile (sexp &optional env)
+(define-compilation setq (var val)
+  (format nil "~a = ~a" (lookup-variable var env) (ls-compile val env fenv)))
+
+(defun lisp->js (sexp)
   (cond
-    ((symbolp sexp) (format nil "V_~a" sexp))
-    ((integerp sexp) (format nil " ~a " sexp))
-    ((stringp sexp) (format nil " \"~a\" " sexp))
-    ; list
+    ((integerp sexp) (format nil "~a" sexp))
+    ((stringp sexp) (format nil "\"~a\"" sexp))
+    ((listp sexp)   (concat "[" (join (mapcar 'lisp->js sexp) ",") "]"))))
+
+(define-compilation quote (sexp)
+  (lisp->js sexp))
+
+(define-compilation debug (form)
+  (format nil "console.log(~a)" (ls-compile form env fenv)))
+
+(define-compilation while (pred &rest body)
+  (format nil "(function(){while(~a){~a}})() "
+	  (ls-compile pred env fenv)
+	  (ls-compile-sexps body env fenv)))
+
+(defmacro eval-when-compile (&body body)
+  `(eval-when (:compile-toplevel :execute)
+     ,@body))
+
+(define-compilation eval-when-compile (&rest body)
+  (eval (cons 'progn body)))
+
+;;; aritmetic primitives
+(define-compilation + (x y)
+  (concat "((" (ls-compile x env fenv) ") + (" (ls-compile y env fenv) "))"))
+
+(define-compilation - (x y)
+  (concat "((" (ls-compile x env fenv) ") - (" (ls-compile y env fenv) "))"))
+
+(define-compilation * (x y)
+  (concat "((" (ls-compile x env fenv) ") * (" (ls-compile y env fenv) "))"))
+
+(define-compilation / (x y)
+  (concat "((" (ls-compile x env fenv) ") / (" (ls-compile y env fenv) "))"))
+
+(define-compilation = (x y)
+  (concat "((" (ls-compile x env fenv) ") == (" (ls-compile y env fenv) "))"))
+
+
+(defun %compile-defvar (name)
+  (push (make-var-binding name) *env*)
+  (format nil "var ~a" (lookup-variable name *env*)))
+
+(defun %compile-defun (name)
+  (push (make-func-binding name) *fenv*)
+  (format nil "var ~a" (lookup-variable name *fenv*)))
+
+(defun compile-funcall (name args env fenv)
+  (format nil "~a(~{~a~^, ~})"
+          (lookup-function name fenv)
+          (mapcar (lambda (x) (ls-compile x env fenv)) args)))
+
+(defun ls-compile (sexp &optional env fenv)
+  (cond
+    ((symbolp sexp) (lookup-variable sexp env))
+    ((integerp sexp) (format nil "~a" sexp))
+    ((stringp sexp) (format nil "\"~a\"" sexp))
     ((listp sexp)
      (let ((compiler-func (second (assoc (car sexp) *compilations*))))
        (if compiler-func
-           (apply compiler-func env (cdr sexp))
-           ;; funcall
-           )))))
-
-(defun ls-compile-block (sexps env)
-  (format nil
-    "~{~#[~; return ~a;~:;~a;~%~]~}"
-    (mapcar #'(lambda (x)
-		      (ls-compile x env))
-		  sexps)))
+           (apply compiler-func env fenv (cdr sexp))
+           (compile-funcall (car sexp) (cdr sexp) env fenv))))))
+
+
+;;; Testing
+
+(defun compile-test ()
+  (with-open-file (in "test.lisp")
+    (with-open-file (out "test.js" :direction :output :if-exists :supersede)
+      (loop
+         for x = (read in nil) while x
+         do (write-line (concat (ls-compile x) "; ") out)))))