r4886: Automatic commit for debian_version_0_2_0-1

[cl-readline.git] / readline.lisp

diff --git a/readline.lisp b/readline.lisp
index 4e8af262c09fe969a4d58d71974a6809c3b6ae1f..95c460f235689d2629427a40d1f57de72a0a39b2 100644 (file)
--- a/readline.lisp
+++ b/readline.lisp
@@ -23,25 +23,67 @@
 
 (defvar *whitespace* (list #\Space #\Tab))
 
-(let (cl-complete)
+(defun convert-and-free-foreign-string (foreign-string)
+  (let ((lisp-string (convert-from-foreign-string foreign-string)))
+    (free-foreign-object foreign-string)
+      lisp-string))
+
+(defmacro ignore-end-of-file (&body forms)
+  `(catch 'end-of-file
+    (handler-bind ((end-of-file (lambda (e)
+                                 (declare (ignore e))
+                                 (throw 'end-of-file nil))))
+      ,@forms)))
+
+(def-function ("readline" c-readline)
+    ((prompt :cstring))
+  :module "readline"
+  :returning (* :char))
+
+(def-function ("add_history" c-add-history)
+    ((str :cstring))
+  :module "readline"
+  :returning :void)
+
+(def-function ("add_completion" c-add-completion)
+    ((str :cstring))
+  :module "cl-readline"
+  :returning :int)
+
+(def-function ("clear_completions" c-clear-completions)
+    ()
+  :module "cl-readline"
+  :returning :void)
+
+(def-function "use_custom_complete"
+    ()
+  :module "cl-readline"
+  :returning :void)
+
+(def-function "use_filename_complete"
+    ()
+  :module "cl-readline"
+  :returning :void)
+
+(let (pkg)
   
   (defun add-completion (string)
     "Add STRING as a custom-completion."
-    (setq cl-complete nil)
+    (setq pkg nil)
     (with-cstring (c-str string)
-      (= 1 (libreadline::add-completion c-str))))
+      (= 1 (c-add-completion c-str))))
 
   (defun clear-completions ()
     "Clear all custom-completions."
-    (setq cl-complete nil)
-    (libreadline::clear-completions))
+    (setq pkg nil)
+    (c-clear-completions))
   
-  (defun use-cl-complete ()
+  (defun use-package-complete (package)
     "Load symbols in package CL-USER as custom-completions."
-    (unless cl-complete
-      (setq cl-complete t)
+    (unless (eql pkg package)
+      (setq pkg package)
       (clear-completions)
-      (do-symbols (sym (find-package :cl-user))
+      (do-symbols (sym (find-package package))
        (add-completion (string-downcase (string sym)))))
     (use-custom-complete)
     nil))
@@ -49,29 +91,32 @@
 ;;; Everything that affects the custom-completion collection goes
 ;;; above.
 
-(defun use-custom-complete ()
-  "Use custom-competions."
-  (libreadline::use-custom-complete)
-  nil)
-  
-(defun use-filename-complete ()
-  "Use default completion system. (filename)"
-  (libreadline::use-filename-complete)
-  nil)
 
 (defun add-history (string)
   "Add STRING to history."
   (with-cstring (c-string string)
-    (libreadline::add-history c-string))
+    (c-add-history c-string))
   string)
   
 (defun readline (&key (prompt "") (history t))
   "Read a line from current TTY with line-editing."
   (with-cstring (c-prompt prompt)
-    (let* ((char* (libreadline::readline c-prompt))
-          (str (string-trim *whitespace*
-                            (convert-from-foreign-string char*))))
-      (free-foreign-object char*)
+    (let ((str (string-trim *whitespace*
+                           (convert-and-free-foreign-string (c-readline c-prompt)))))
       (when (and history (not (string= "" str)))
        (add-history str))
       str)))
+
+(defun readexpr (&key (primary-prompt "=> ") (secondary-prompt "|     ") (history t))
+  "Read an expression from current TTY with line-editing."
+  (let (expr)
+    (do* ((str (readline :prompt primary-prompt :history history)
+              (readline :prompt secondary-prompt :history history))
+         (input str (concatenate 'string input " " str)))
+        ((ignore-end-of-file
+          (setq expr (with-input-from-string (in input)
+                       (read in nil nil))))
+         expr))))
+
+
+