Implement print-circle, allowing recursive and circular structures to be read. src/ChangeLog addition: 2011-09-04 Aidan Kehoe <kehoea@parhasard.net> * alloc.c: * alloc.c (ALLOC_FROB_BLOCK_LISP_OBJECT_1): * alloc.c (ALLOC_FROB_BLOCK_LISP_OBJECT): * alloc.c (cons_print_preprocess): * alloc.c (vector_print_preprocess): * alloc.c (vector_nsubst_structures_descend): * alloc.c (Fmake_symbol): * alloc.c (UNMARK_symbol): * alloc.c (sweep_symbols): * alloc.c (reinit_alloc_objects_early): * alloc.c (reinit_alloc_early): * bytecode.c: * bytecode.c (compiled_function_print_preprocess): * bytecode.c (compiled_function_nsubst_structures_descend): * bytecode.c (set_compiled_function_arglist): * bytecode.c (set_compiled_function_interactive): * bytecode.c (bytecode_objects_create): * chartab.c: * chartab.c (print_preprocess_mapper): * chartab.c (nsubst_structures_mapper): * chartab.c (char_table_nsubst_structures_descend): * chartab.c (chartab_objects_create): * elhash.c: * elhash.c (nsubst_structures_map_hash_table): * elhash.c (hash_table_nsubst_structures_descend): * elhash.c (print_preprocess_mapper): * elhash.c (hash_table_print_preprocess): * elhash.c (inchash_eq): * elhash.c (hash_table_objects_create): * elhash.c (syms_of_elhash): * elhash.h: * emacs.c (main_1): * fns.c: * fns.c (check_eq_nokey): * fns.c (Fnsubst): * fns.c (syms_of_fns): * lisp.h: * lisp.h (struct Lisp_Symbol): * lisp.h (IN_OBARRAY): * lisp.h (struct): * lisp.h (PRINT_PREPROCESS): * lread.c (read1): * lrecord.h: * lrecord.h (struct lrecord_implementation): * lrecord.h (DEFINE_DUMPABLE_MODULE_LISP_OBJECT): * print.c: * print.c (PRINT_CIRCLE_LIMIT): * print.c (print_continuous_numbering_changed): * print.c (print_prepare): * print.c (print_finish): * print.c (Fprin1_to_string): * print.c (print_cons): * print.c (print_preprocess_inchash_eq): * print.c (print_preprocess): * print.c (print_sort_get_numbers): * print.c (print_sort_compare_ordinals): * print.c (print_gensym_or_circle): * print.c (nsubst_structures_descend): * print.c (nsubst_structures): * print.c (print_internal): * print.c (print_symbol): * print.c (vars_of_print): * rangetab.c: * rangetab.c (range_table_print_preprocess): * rangetab.c (range_table_nsubst_structures_descend): * rangetab.c (rangetab_objects_create): * rangetab.c (syms_of_rangetab): * symbols.c: * symbols.c (symbol_print_preprocess): * symbols.c (Fintern): * symbols.c (Funintern): * symbols.c (reinit_symbol_objects_early): * symbols.c (init_symbols_once_early): * symsinit.h: Implement print-circle, printing circular structures in a readable fashion, and treating them appropriately on read. This is by means of two new object methods, print_preprocess (detecting circularities), and nsubst_structures_descend (replacing placeholders with the read objects). Expose the substitution to Lisp via #'nsubst and its new :descend-structures keyword. Store information as to whether symbols are interned in obarray or not in their header, making checking for keywords and uninterned symbols (and thus printing) cheaper. Default print_gensym to t, as Common Lisp does, and as a more-than-decade old comment suggests. lisp/ChangeLog addition: 2011-09-04 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el (byte-compile-output-file-form): * bytecomp.el (byte-compile-output-docform): Bind print-circle, print-continuous-numbering in these functions, now those variables are available. * lisp.el (forward-sexp): * lisp.el (backward-sexp): Recognise leading #N= as being part of an expression. tests/ChangeLog addition: 2011-09-04 Aidan Kehoe <kehoea@parhasard.net> * automated/lisp-reader-tests.el: * automated/lisp-tests.el (literal-with-uninterned): * automated/symbol-tests.el (foo): Test print-circle, for printing (mutually-)recursive and circular structures. Bind print-continuous-numbering where appropriate.

;;; tty-init.el --- initialization code for tty's

;; Copyright (C) 1994, 1997 Free Software Foundation, Inc.
;; Copyright (C) 1996 Ben Wing <ben@xemacs.org>.

;; Maintainer: XEmacs Development Team
;; Keywords: terminals, dumped

;; This file is part of XEmacs.

;; XEmacs is free software: you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by the
;; Free Software Foundation, either version 3 of the License, or (at your
;; option) any later version.

;; XEmacs is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
;; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
;; for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Synched up with: Not synched.

;;; Commentary:

;; This file is dumped with XEmacs (when TTY support is compiled in).

;;; Code:

(defvar make-device-early-tty-entry-point-called-p nil
  "Whether `make-device-early-tty-entry-point' has been called, at least once.")

(defun make-device-early-tty-entry-point ()
  "Entry point to set up the Lisp environment for TTY device creation."
  (with-fboundp 'register-tty-color
    (unless make-device-early-tty-entry-point-called-p
      (register-tty-color "black"   "\e[30m" "\e[40m")
      (register-tty-color "red"     "\e[31m" "\e[41m")
      (register-tty-color "green"   "\e[32m" "\e[42m")
      (register-tty-color "yellow"  "\e[33m" "\e[43m")
      (register-tty-color "blue"    "\e[34m" "\e[44m")
      (register-tty-color "magenta" "\e[35m" "\e[45m")
      (register-tty-color "cyan"    "\e[36m" "\e[46m")
      (register-tty-color "white"   "\e[37m" "\e[47m")

      ;; Define `highlighted' tty colors
      (register-tty-color "darkgrey"      "\e[1;30m" "\e[1;40m")
      (register-tty-color "brightred"     "\e[1;31m" "\e[1;41m")
      (register-tty-color "brightgreen"   "\e[1;32m" "\e[1;42m")
      (register-tty-color "brightyellow"  "\e[1;33m" "\e[1;43m")
      (register-tty-color "brightblue"    "\e[1;34m" "\e[1;44m")
      (register-tty-color "brightmagenta" "\e[1;35m" "\e[1;45m")
      (register-tty-color "brightcyan"    "\e[1;36m" "\e[1;46m")
      (register-tty-color "brightwhite"   "\e[1;37m" "\e[1;47m")

      (setq make-device-early-tty-entry-point-called-p t))))

;; We have to do this for every created TTY console, after the first frame
;; has been created.
(defun make-frame-after-init-entry-point (console)
  "Entry point for Lisp called after first frame creation on a TTY device."
  ;; load the appropriate term-type-specific Lisp file.
  ;; we don't do this at startup here so that the user can
  ;; override term-file-prefix. (startup.el does it after
  ;; loading the init file.)
  (when (and (find-coding-system 'euc-jp)
             (string-match "^kterm" (getenv "TERM")))
    (set-console-tty-coding-system console 'euc-jp))
  (when init-file-loaded
    ;; temporarily select the console so that the changes
    ;; to function-key-map are made for the right console.
    (let ((foobar (selected-console)))
      (unwind-protect
	  (progn
	    (select-console console)
	    (load-terminal-library))
	(select-console foobar)))))

(defun make-frame-on-tty (tty &optional props)
  "Create a frame on the TTY connection named TTY.
TTY should be a TTY device name such as \"/dev/ttyp3\" (as returned by
the `tty' command in that TTY), or nil for the standard input/output
of the running XEmacs process.

PROPS should be a plist of properties, as in the call to `make-frame'.

This function opens a connection to the TTY or reuses an existing
connection.

This function is a trivial wrapper around `make-frame-on-device'."
  (interactive "sMake frame on TTY: ")
  (if (equal tty "") (setq tty nil))
  (make-frame-on-device 'tty tty props))

;;; tty-init.el ends here