;;; -*- Mode: Common-Lisp; Package: system; Base: 10.; Patch-File: T -*-

;;; Reason:  Modified SYS:BASIC-BUFFERED-OUTPUT-STREAM :READ-CURSORPOS and :increment-cursorpos to not error when stream-input-buffer is a network packet. 

;;;                           RESTRICTED RIGHTS LEGEND
;;;
;;; Use, duplication, or disclosure by the Government is subject to
;;; restrictions as set forth in subdivision (c)(1)(ii) of the Rights in
;;; Technical Data and Computer Software clause at 52.227-7013.
;;;
;;;   TEXAS INSTRUMENTS INCORPORATED      
;;;   P.O. BOX 2909, M/S 2151             
;;;   AUSTIN, TEXAS 78769                 
;;;
;;; Copyright (C) 1989 Texas Instruments Incorporated.
;;; All rights reserved.

;;; Written 02/22/90 12:26:37 by BERGER,
;;; while running on Pasteur from band LOD2
;;; With SYSTEM 6.30, VIRTUAL-MEMORY 6.3, EH 6.6, MAKE-SYSTEM 6.2, MICRONET 6.0, LOCAL-FILE 6.1,
;;;  BASIC-PATHNAME 6.3, NETWORK-SUPPORT-COLD 6.2, BASIC-NAMESPACE 6.7, NETWORK-NAMESPACE 6.1,
;;;  DISK-IO 6.2, DISK-LABEL 6.0, BASIC-FILE 6.7, MAC-PATHNAME 6.0, NETWORK-PATHNAME 6.1,
;;;  COMPILER 6.14, TV 6.24, DATALINK 6.0, CHAOSNET 6.5, GC 6.3, MEMORY-AUX 6.0, NVRAM 6.2,
;;;  SYSLOG 6.2, STREAMER-TAPE 6.5, UCL 6.0, INPUT-EDITOR 6.0, METER 6.1, ZWEI 6.12,
;;;  DEBUG-TOOLS 6.4, NETWORK-SUPPORT 6.1, NETWORK-SERVICE 6.2, DATALINK-DISPLAYS 6.0,
;;;  FONT-EDITOR 6.1, SERIAL 6.0, PRINTER 6.3, MAC-PRINTER-TYPES 6.1, PRINTER-TYPES 6.2,
;;;  IMAGEN 6.1, SUGGESTIONS 6.1, MAIL-DAEMON 6.5, MAIL-READER 6.7, TELNET 6.1, VT100 6.0,
;;;  NAMESPACE-EDITOR 6.4, PROFILE 6.2, VISIDOC 6.7, TI-CLOS 6.39, CLEH 6.5, IP 3.57,
;;;  Experimental CLX 6.8, CLUE 6.59, X11M 6.20, Experimental BUG 11.18,  microcode 648,
;;;  Band Name: rel6.0 1/23

#!C
; From file STREAM.LISP#> BASIC-FILE; SYS SYSTEM#:
(COMPILER-LET ((*PACKAGE* (FIND-PACKAGE "SYSTEM"))
                          (SI:*LISP-MODE* :COMMON-LISP)
                          (*READTABLE* COMMON-LISP-READTABLE)
                          (SI:*READER-SYMBOL-SUBSTITUTIONS* *COMMON-LISP-SYMBOL-SUBSTITUTIONS*))
  (COMPILER#:PATCH-SOURCE-FILE "SYS: BASIC-FILE; STREAM.#"



(DEFMETHOD (SYS:BASIC-BUFFERED-OUTPUT-STREAM :READ-CURSORPOS) (&OPTIONAL UNITS) ; DAB 12-08-89
  "Reads the current cursor position relative to the last NEWLINE. UNITS much be :CHARACTER.
   NOTE: The :SET-POINTER operation will reset the position of the last NEWLINE to zero. This may cause a 
   value return from  :READ-CURSORPOS to be smaller than what it really is."
    (UNLESS (EQ UNITS ':CHARACTER)
      (ERROR "UNITS is ~S; only ~S is meaningful here." UNITS ':CHARACTER))
    (IF (NULL STREAM-OUTPUT-BUFFER) ; haven't started writing yet
	(VALUES 0 0)
	(unless (or (stringp  STREAM-OUTPUT-BUFFER) (send self :characters)) ; DAB 02-22-90
	  (ERROR "~a must be a character stream." self))
	(LET ((NX (POSITION #\NEWLINE (THE STRING STREAM-OUTPUT-BUFFER)  ; DAB 12-08-89Get the last position
			    :END STREAM-OUTPUT-INDEX :FROM-END T)))
	  (VALUES (IF (NULL NX) ;Last NEWLINE is in previous buffer.
		      ;;last-position-newline is updated in :send-current-output-buffer.
		      (+ STREAM-OUTPUT-INDEX last-position-newline ) 
		      (- STREAM-OUTPUT-INDEX NX 1))
		  0))))

(DEFMETHOD (SYS:BASIC-BUFFERED-OUTPUT-STREAM :increment-CURSORPOS) (&OPTIONAL (X 0) (y 0) UNITS) ; DAB 12-08-89
  "Outputs X spaces from current cursor position."
    (UNLESS (EQ UNITS ':CHARACTER)
      (ERROR "UNITS is ~S; only ~S is meaningful here." UNITS ':CHARACTER))
    (unless (or (stringp  STREAM-OUTPUT-BUFFER) (send self :characters)) ; DAB 02-22-90
      (ERROR "~a must be a character stream." self))
  (UNLESS (EQ Y 0)   ; DAB 12-08-89 Y must be ZERO since we only operate in the X-plane.
    (ERROR "The Y argument must be 0"))
   (dotimes (xx x) (send self :tyo #\space))	;Output the SPACES.
   )

))