X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=ecmalisp.lisp;h=de2fe683cda20cb449e317daaeb1366b6f0b985d;hb=3c6beba19730ea86d423a9970fe6a600fe3c3ef3;hp=eba5b14fc1b465c100cf059f142955647880943f;hpb=5c33064bc5e5a990afca671705849bd19fab99c6;p=jscl.git

diff --git a/ecmalisp.lisp b/ecmalisp.lisp
index eba5b14..de2fe68 100644
--- a/ecmalisp.lisp
+++ b/ecmalisp.lisp
@@ -40,7 +40,7 @@
     `(eval-when-compile
        ,@(mapcar (lambda (decl) `(!proclaim ',decl)) decls)))
 
-  (declaim (constant nil t))
+  (declaim (constant nil t) (special t nil))
   (setq nil 'nil)
   (setq t 't)
 
@@ -52,6 +52,7 @@
 
   (defmacro defvar (name value &optional docstring)
     `(progn
+       (declaim (special ,name))
        (unless (boundp ',name) (setq ,name ,value))
        ,@(when (stringp docstring) `((oset ',name "vardoc" ,docstring)))
        ',name))
@@ -97,8 +98,6 @@
 
   ;; Basic functions
   (defun = (x y) (= x y))
-  (defun + (x y) (+ x y))
-  (defun - (x y) (- x y))
   (defun * (x y) (* x y))
   (defun / (x y) (/ x y))
   (defun 1+ (x) (+ x 1))
@@ -248,6 +247,18 @@
 ;;; constructions.
 #+ecmalisp
 (progn
+  (defun + (&rest args)
+    (let ((r 0))
+      (dolist (x args r)
+	(incf r x))))
+
+  (defun - (x &rest others)
+    (if (null others)
+	(- x)
+	(let ((r x))
+	  (dolist (y others r)
+	    (decf r y)))))
+
   (defun append-two (list1 list2)
     (if (null list1)
         list2
@@ -274,9 +285,13 @@
       l))
 
   (defun length (seq)
-    (if (stringp seq)
-        (string-length seq)
-        (list-length seq)))
+    (cond
+      ((stringp seq)
+       (string-length seq))
+      ((arrayp seq)
+       (oget seq "length"))
+      ((listp seq)
+       (list-length seq))))
 
   (defun concat-two (s1 s2)
     (concat-two s1 s2))
@@ -456,6 +471,9 @@
 
   (defvar *package-list* nil)
 
+  (defun list-all-packages ()
+    *package-list*)
+
   (defun make-package (name &optional use)
     (let ((package (new))
           (use (mapcar #'find-package-or-fail use)))
@@ -503,6 +521,12 @@
   (defvar *user-package*
     (make-package "CL-USER" (list *common-lisp-package*)))
 
+  (defvar *keyword-package*
+    (make-package "KEYWORD"))
+
+  (defun keywordp (x)
+    (and (symbolp x) (eq (symbol-package x) *keyword-package*)))
+
   (defvar *package* *common-lisp-package*)
 
   (defmacro in-package (package-designator)
@@ -521,20 +545,28 @@
       (let ((symbols (%package-symbols package)))
         (if (in name symbols)
             (cons (oget symbols name) t)
-            (dolist (used (package-use-list package) (cons nil nil)))))))
+            (dolist (used (package-use-list package) (cons nil nil))
+              (let ((exports (%package-external-symbols used)))
+                (when (in name exports)
+                  (return-from %find-symbol
+                    (cons (oget exports name) t)))))))))
 
   (defun find-symbol (name &optional (package *package*))
     (car (%find-symbol name package)))
 
   (defun intern (name &optional (package *package*))
-    (let ((result (%find-symbol name package)))
-      (if (cdr result)
-          (car result)
-          (let ((symbols (%package-symbols package)))
-            (oget symbols name)
-            (let ((symbol (make-symbol name)))
-              (oset symbol "package" package)
-              (oset symbols name symbol))))))
+    (let ((package (find-package-or-fail package)))
+      (let ((result (%find-symbol name package)))
+        (if (cdr result)
+            (car result)
+            (let ((symbols (%package-symbols package)))
+              (oget symbols name)
+              (let ((symbol (make-symbol name)))
+                (oset symbol "package" package)
+                (when (eq package *keyword-package*)
+                  (oset symbol "value" symbol)
+                  (export (list symbol) package))
+                (oset symbols name symbol)))))))
 
   (defun symbol-package (symbol)
     (unless (symbolp symbol)
@@ -567,7 +599,10 @@
   (defun setcar (cons new)
     (setf (car cons) new))
   (defun setcdr (cons new)
-    (setf (cdr cons) new)))
+    (setf (cdr cons) new))
+
+  (defun aset (array idx value)
+    (setf (aref array idx) value)))
 
 ;;; At this point, no matter if Common Lisp or ecmalisp is compiling
 ;;; from here, this code will compile on both. We define some helper
@@ -602,6 +637,19 @@
 (defun mapconcat (func list)
   (join (mapcar func list)))
 
+(defun vector-to-list (vector)
+  (let ((list nil)
+	(size (length vector)))
+    (dotimes (i size (reverse list))
+      (push (aref vector i) list))))
+
+(defun list-to-vector (list)
+  (let ((v (make-array (length list)))
+	(i 0))
+    (dolist (x list v)
+      (aset v i x)
+      (incf i))))
+
 ;;; Like CONCAT, but prefix each line with four spaces. Two versions
 ;;; of this function are available, because the Ecmalisp version is
 ;;; very slow and bootstraping was annoying.
@@ -670,7 +718,15 @@
 (progn
   (defun prin1-to-string (form)
     (cond
-      ((symbolp form) (symbol-name form))
+      ((symbolp form)
+       (if (cdr (%find-symbol (symbol-name form) *package*))
+           (symbol-name form)
+           (let ((package (symbol-package form))
+                 (name (symbol-name form)))
+             (concat (if (eq package (find-package "KEYWORD"))
+                         ""
+                         (package-name package))
+                     ":" name))))
       ((integerp form) (integer-to-string form))
       ((stringp form) (concat "\"" (escape-string form) "\""))
       ((functionp form)
@@ -686,6 +742,8 @@
                      (prin1-to-string (car last))
                      (concat (prin1-to-string (car last)) " . " (prin1-to-string (cdr last)))))
                ")"))
+      ((arrayp form)
+       (concat "#" (prin1-to-string (vector-to-list form))))
       ((packagep form)
        (concat "#<PACKAGE " (package-name form) ">"))))
 
@@ -788,6 +846,7 @@
   (ecase (%read-char stream)
     (#\'
      (list 'function (ls-read stream)))
+    (#\( (list-to-vector (%read-list stream)))
     (#\\
      (let ((cname
             (concat (string (%read-char stream))
@@ -840,7 +899,9 @@
     (setq package (find-package package))
     ;; TODO: PACKAGE:SYMBOL should signal error if SYMBOL is not an
     ;; external symbol from PACKAGE.
-    (intern name package)))
+    (if (or internalp (eq package (find-package "KEYWORD")))
+        (intern name package)
+        (find-symbol name package))))
 
 (defvar *eof* (gensym))
 (defun ls-read (stream)
@@ -973,6 +1034,10 @@
 
 (defun !proclaim (decl)
   (case (car decl)
+    (special
+     (dolist (name (cdr decl))
+       (let ((b (global-binding name 'variable 'variable)))
+         (push-binding-declaration 'special b))))
     (notinline
      (dolist (name (cdr decl))
        (let ((b (global-binding name 'function 'function)))
@@ -1153,7 +1218,9 @@
      (or (cdr (assoc sexp *literal-symbols*))
 	 (let ((v (genlit))
 	       (s #+common-lisp (concat "{name: \"" (escape-string (symbol-name sexp)) "\"}")
-		  #+ecmalisp (ls-compile `(intern ,(symbol-name sexp)))))
+		  #+ecmalisp (ls-compile
+                              `(intern ,(symbol-name sexp)
+                                       ,(package-name (symbol-package sexp))))))
 	   (push (cons sexp v) *literal-symbols*)
 	   (toplevel-compilation (concat "var " v " = " s))
 	   v)))
@@ -1164,7 +1231,15 @@
 	   c
 	   (let ((v (genlit)))
 	     (toplevel-compilation (concat "var " v " = " c))
-	     v))))))
+	     v))))
+    ((arrayp sexp)
+     (let ((elements (vector-to-list sexp)))
+       (let ((c (concat "[" (join (mapcar #'literal elements) ", ") "]")))
+	 (if recursive
+	     c
+	     (let ((v (genlit)))
+	       (toplevel-compilation (concat "var " v " = " c))
+	       v)))))))
 
 (define-compilation quote (sexp)
   (literal sexp))
@@ -1194,43 +1269,46 @@
 (define-compilation progn (&rest body)
   (js!selfcall (ls-compile-block body t)))
 
-(defun dynamic-binding-wrapper (bindings body)
-  (if (null bindings)
-      body
-      (concat
-       "try {" *newline*
-       (indent
-        "var tmp;" *newline*
-        (join
-         (mapcar (lambda (b)
-                   (let ((s (ls-compile `(quote ,(car b)))))
-                     (concat "tmp = " s ".value;" *newline*
-                             s ".value = " (cdr b) ";" *newline*
-                             (cdr b) " = tmp;" *newline*)))
-                 bindings))
-        body)
-       "}" *newline*
-       "finally {"  *newline*
-       (indent
-        (join-trailing
-         (mapcar (lambda (b)
-                   (let ((s (ls-compile `(quote ,(car b)))))
-                     (concat s ".value" " = " (cdr b))))
-                 bindings)
-         (concat ";" *newline*)))
-       "}" *newline*)))
-
+(defun special-variable-p (x)
+  (claimp x 'variable 'special))
+
+;;; Wrap CODE to restore the symbol values of the dynamic
+;;; bindings. BINDINGS is a list of pairs of the form
+;;; (SYMBOL . PLACE),  where PLACE is a Javascript variable
+;;; name to initialize the symbol value and where to stored
+;;; the old value.
+(defun let-binding-wrapper (bindings body)
+  (when (null bindings)
+    (return-from let-binding-wrapper body))
+  (concat
+   "try {" *newline*
+   (indent "var tmp;" *newline*
+           (mapconcat
+            (lambda (b)
+              (let ((s (ls-compile `(quote ,(car b)))))
+                (concat "tmp = " s ".value;" *newline*
+                        s ".value = " (cdr b) ";" *newline*
+                        (cdr b) " = tmp;" *newline*)))
+            bindings)
+           body *newline*)
+   "}" *newline*
+   "finally {"  *newline*
+   (indent
+    (mapconcat (lambda (b)
+                 (let ((s (ls-compile `(quote ,(car b)))))
+                   (concat s ".value" " = " (cdr b) ";" *newline*)))
+               bindings))
+   "}" *newline*))
 
 (define-compilation let (bindings &rest body)
   (let ((bindings (mapcar #'ensure-list bindings)))
-    (let ((variables (mapcar #'first bindings))
-          (values    (mapcar #'second bindings)))
-      (let ((cvalues (mapcar #'ls-compile values))
-            (*environment* (extend-local-env (remove-if #'boundp variables)))
+    (let ((variables (mapcar #'first bindings)))
+      (let ((cvalues (mapcar #'ls-compile (mapcar #'second bindings)))
+            (*environment* (extend-local-env (remove-if #'special-variable-p variables)))
             (dynamic-bindings))
         (concat "(function("
                 (join (mapcar (lambda (x)
-                                (if (boundp x)
+                                (if (special-variable-p x)
                                     (let ((v (gvarname x)))
                                       (push (cons x v) dynamic-bindings)
                                       v)
@@ -1239,10 +1317,58 @@
                       ",")
                 "){" *newline*
                 (let ((body (ls-compile-block body t)))
-                  (indent (dynamic-binding-wrapper dynamic-bindings body)))
+                  (indent (let-binding-wrapper dynamic-bindings body)))
                 "})(" (join cvalues ",") ")")))))
 
 
+;;; Return the code to initialize BINDING, and push it extending the
+;;; current lexical environment if the variable is special.
+(defun let*-initialize-value (binding)
+  (let ((var (first binding))
+        (value (second binding)))
+    (if (special-variable-p var)
+        (concat (ls-compile `(setq ,var ,value)) ";" *newline*)
+        (let ((v (gvarname var)))
+          (let ((b (make-binding var 'variable v)))
+            (prog1 (concat "var " v " = " (ls-compile value) ";" *newline*)
+              (push-to-lexenv b *environment* 'variable)))))))
+
+;;; Wrap BODY to restore the symbol values of SYMBOLS after body. It
+;;; DOES NOT generate code to initialize the value of the symbols,
+;;; unlike let-binding-wrapper.
+(defun let*-binding-wrapper (symbols body)
+  (when (null symbols)
+    (return-from let*-binding-wrapper body))
+  (let ((store (mapcar (lambda (s) (cons s (gvarname s)))
+                       (remove-if-not #'special-variable-p symbols))))
+    (concat
+     "try {" *newline*
+     (indent
+      (mapconcat (lambda (b)
+                   (let ((s (ls-compile `(quote ,(car b)))))
+                     (concat "var " (cdr b) " = " s ".value;" *newline*)))
+                 store)
+      body)
+     "}" *newline*
+     "finally {" *newline*
+     (indent
+      (mapconcat (lambda (b)
+                   (let ((s (ls-compile `(quote ,(car b)))))
+                     (concat s ".value" " = " (cdr b) ";" *newline*)))
+                 store))
+     "}" *newline*)))
+
+
+(define-compilation let* (bindings &rest body)
+  (let ((bindings (mapcar #'ensure-list bindings))
+        (*environment* (copy-lexenv *environment*)))
+    (js!selfcall
+      (let ((specials (remove-if-not #'special-variable-p (mapcar #'first bindings)))
+            (body (concat (mapconcat #'let*-initialize-value bindings)
+                          (ls-compile-block body t))))
+        (let*-binding-wrapper specials body)))))
+
+
 (defvar *block-counter* 0)
 
 (define-compilation block (name &rest body)
@@ -1449,12 +1575,54 @@
                decls)
      (concat "return " (progn ,@body) ";" *newline*)))
 
+;;; VARIABLE-ARITY compiles variable arity operations. ARGS stands for
+;;; a variable which holds a list of forms. It will compile them and
+;;; store the result in some Javascript variables. BODY is evaluated
+;;; with ARGS bound to the list of these variables to generate the
+;;; code which performs the transformation on these variables.
+
+(defun variable-arity-call (args function)
+  (unless (consp args)
+    (error "ARGS must be a non-empty list"))
+  (let ((counter 0)
+        (variables '())
+        (prelude ""))
+    (dolist (x args)
+      (let ((v (concat "x" (integer-to-string (incf counter)))))
+        (push v variables)
+        (concatf prelude
+                 (concat "var " v " = " (ls-compile x) ";" *newline*
+                         "if (typeof " v " !== 'number') throw 'Not a number!';"
+                         *newline*))))
+    (js!selfcall prelude (funcall function (reverse variables)))))
+
+
+(defmacro variable-arity (args &body body)
+  (unless (symbolp args)
+    (error "Bad usage of VARIABLE-ARITY, yo must pass a symbol"))
+  `(variable-arity-call ,args
+                        (lambda (,args)
+                          (concat "return " ,@body ";" *newline*))))
+
+
 (defun num-op-num (x op y)
   (type-check (("x" "number" x) ("y" "number" y))
     (concat "x" op "y")))
 
-(define-builtin + (x y) (num-op-num x "+" y))
-(define-builtin - (x y) (num-op-num x "-" y))
+(define-raw-builtin + (&rest numbers)
+  (if (null numbers)
+      "0"
+      (variable-arity numbers
+	(join numbers "+"))))
+
+(define-raw-builtin - (x &rest others)
+  (let ((args (cons x others)))
+    (variable-arity args
+      (if (null others)
+	  (concat "-" (car args))
+	  (join args "-")))))
+
+
 (define-builtin * (x y) (num-op-num x "*" y))
 (define-builtin / (x y) (num-op-num x "/" y))
 
@@ -1638,6 +1806,33 @@
   (type-check (("x" "string" x))
     "lisp.write(x)"))
 
+(define-builtin make-array (n)
+  (js!selfcall
+    "var r = [];" *newline*
+    "for (var i = 0; i < " n "; i++)" *newline*
+    (indent "r.push(" (ls-compile nil) ");" *newline*)
+    "return r;" *newline*))
+
+(define-builtin arrayp (x)
+  (js!bool
+   (js!selfcall
+     "var x = " x ";" *newline*
+     "return typeof x === 'object' && 'length' in x;")))
+
+(define-builtin aref (array n)
+  (js!selfcall
+    "var x = " "(" array ")[" n "];" *newline*
+    "if (x === undefined) throw 'Out of range';" *newline*
+    "return x;" *newline*))
+
+(define-builtin aset (array n value)
+  (js!selfcall
+    "var x = " array ";" *newline*
+    "var i = " n ";" *newline*
+    "if (i < 0 || i >= x.length) throw 'Out of range';" *newline*
+    "return x[i] = " value ";" *newline*))
+
+
 (defun macro (x)
   (and (symbolp x)
        (let ((b (lookup-in-lexenv x *environment* 'function)))
@@ -1687,14 +1882,16 @@
     ((symbolp sexp)
      (let ((b (lookup-in-lexenv sexp *environment* 'variable)))
        (cond
-         ((eq (binding-type b) 'lexical-variable)
+         ((and b (not (member 'special (binding-declarations b))))
           (binding-value b))
-         ((claimp sexp 'variable 'constant)
+         ((or (keywordp sexp)
+              (member 'constant (binding-declarations b)))
           (concat (ls-compile `',sexp) ".value"))
          (t
           (ls-compile `(symbol-value ',sexp))))))
     ((integerp sexp) (integer-to-string sexp))
     ((stringp sexp) (concat "\"" (escape-string sexp) "\""))
+    ((arrayp sexp) (literal sexp))
     ((listp sexp)
      (let ((name (car sexp))
            (args (cdr sexp)))
@@ -1711,7 +1908,9 @@
          (t
           (if (macro name)
               (ls-compile (ls-macroexpand-1 sexp))
-              (compile-funcall name args))))))))
+              (compile-funcall name args))))))
+    (t
+     (error "How should I compile this?"))))
 
 (defun ls-compile-toplevel (sexp)
   (let ((*toplevel-compilations* nil))
@@ -1748,25 +1947,23 @@
                (ls-compile-toplevel x))))
       (js-eval code)))
 
-  (export '(* *gensym-counter* *package* + - / 1+ 1- < <= = = > >= and append
-            apply assoc atom block boundp boundp butlast caar cadddr
-            caddr cadr car car case catch cdar cdddr cddr cdr cdr char
-            char-code char= code-char cond cons consp copy-list decf
-            declaim defparameter defun defvar digit-char-p disassemble
-            documentation dolist dotimes ecase eq eql equal error eval
-            every export fdefinition find-package find-symbol first
-            fourth fset funcall function functionp gensym go identity
-            in-package incf integerp integerp intern lambda-code last
-            length let list listp make-package make-symbol mapcar
-            member minusp mod nil not nth nthcdr null numberp or
-            package-name package-use-list packagep plusp
-            prin1-to-string print proclaim prog1 prog2 pron push quote
-            remove remove-if remove-if-not return return-from
-            revappend reverse second set setq some string-upcase
-            string string= stringp subseq symbol-function symbol-name
-            symbol-package symbol-plist symbol-value symbolp t tagbody
-            third throw truncate unless unwind-protect variable warn
-            when write-line write-string zerop))
+  (export '(&rest &optional &body * *gensym-counter* *package* + - / 1+ 1- < <= =
+	    = > >= and append apply aref arrayp aset assoc atom block boundp
+	    boundp butlast caar cadddr caddr cadr car car case catch cdar cdddr
+	    cddr cdr cdr char char-code char= code-char cond cons consp copy-list
+	    decf declaim defparameter defun defvar digit-char-p disassemble
+	    documentation dolist dotimes ecase eq eql equal error eval every
+	    export fdefinition find-package find-symbol first fourth fset funcall
+	    function functionp gensym go identity if in-package incf integerp
+	    integerp intern keywordp lambda last length let let* list-all-packages
+	    list listp make-array make-package make-symbol mapcar member minusp
+	    mod nil not nth nthcdr null numberp or package-name package-use-list
+	    packagep plusp prin1-to-string print proclaim prog1 prog2 pron push
+	    quote remove remove-if remove-if-not return return-from revappend
+	    reverse second set setq some string-upcase string string= stringp
+	    subseq symbol-function symbol-name symbol-package symbol-plist
+	    symbol-value symbolp t tagbody third throw truncate unless
+	    unwind-protect variable warn when write-line write-string zerop))
 
   (setq *package* *user-package*)