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sources/edt/extend.bli
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%TITLE 'EXTEND - EXTEND change-mode command'MODULE EXTEND ( ! EXTEND change-mode command
IDENT = '3-004' ! File: EXTEND.BLI Edit: CJG3004
) =
BEGIN
!
! COPYRIGHT (c) 1981, 1985 BY
! DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
! ALL RIGHTS RESERVED.
!
! THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
! ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
! INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
! COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
! OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
! TRANSFERRED.
!
! THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
! AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
! CORPORATION.
!
! DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
! SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
!
!++
! FACILITY: EDT -- The DEC Standard Editor
!
! ABSTRACT:
!
! Do the EXTEND change-mode command, which allows a line-mode
! command to be executed from change mode.
!
! ENVIRONMENT: Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: 6-AUG-1979
!
! MODIFIED BY:
!
! 1-001 - Original. DJS 18-FEB-1981. This module was created by
! extracting routine EDT$$EXT_CMD from module EDTCTR.
! 1-002 - Regularize headers. JBS 04-Mar-1981
! 1-003 - Do prompting from a global and remove LLINE and LCHANGE. JBS 23-Oct-1981
! 1-004 - Replace L_LINE and L_CHANGE 7-Dec-81
! 1-005 - Add EDT$$LOAD_EXTEND, so that EDT$LNM_CMD can reload this routine into
! memory prior to returning to it. Also, use a different symbol
! for EDT$$LNM_CMD, so the overlay analyzer can be told to ignore it.
! JBS 12-Mar-1982
! 1-006 - Do the same for EDT$$PA_CMD. JBS 16-Mar-1982
! 1-007 - Remove L_LINE and L_CHANGE. JBS 03-Jun-1982
! 1-008 - Allow any key to terminate the "Continue" message. SMB 10-Jun-1982
! 1-009 - Fix bug in /RECOVER associated with above change. SMB 16-Jun-1982
! 1-010 - Position the cursor better when waiting for a command to execute.
! SMB 28-Jun-1982
! 1-011 - We can't use TI_WRSTR unless this is a VT100/52. SMB 02-Jul-1982
! 1-012 - Use new formatting flags to control output at the bottom
! of the screen. JBS 05-Jul-1982
! 1-013 - Fix up response to PRTC when reading the journal file. JBS 06-Jul-1982
! 1-014 - Check for control C. STS 15-Jul-1982
! 1-015 - Write out the journal buffer before asking for input. JBS 03-Aug-1982
! 1-016 - Force a cursor positioning sequence and reverse video. SMB 30-Aug-1982
! 1-017 - Output the format buffer after turning off reverse video. SMB 01-Sept-1982
! 1-018 - Don't destory EDT$$G_PRV_COL, it is now being maintained accurately. JBS 05-Oct-1982
! 1-019 - Force a write to the journal file after return is pressed. STS 07-Oct-1982
! 1-020 - Don't clear EDT$$G_SCR_CHGD. JBS 09-Oct-1982
! 1-021 - Check for hardcopy terminal. STS 02-Dec-198_
! 1-022 - Also check for terminal type unknown. STS 03-Dec-1982
! 1-023 - Don't permit a long response to destroy the stack. JBS 13-Dec-1982
! 3-001 - Don't need overlay code. CJG 17-Apr-1983
! 3-002 - Add updates from V3 sources. GB 27-Apr-1983
! 3-003 - Add some checking for PUSH command. CJG 22-Nov-1983
! 3-004 - Clear TIN_ECHOFLG is TXT_ONSCR is set so that <GOLD>repeat will
! always display the count on the message line. CJG 4-Jan-1983
!--
%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!
REQUIRE 'EDTSRC:TRAROUNAM';
FORWARD ROUTINE
EDT$$EXT_CMD : NOVALUE;
!
! INCLUDE FILES:
!
REQUIRE 'EDTSRC:EDTREQ';
REQUIRE 'SYS:JSYS';
!
! MACROS:
!
! NONE
!
! EQUATED SYMBOLS:
!
! NONE
!
! OWN STORAGE:
!
! NONE
!
! EXTERNAL REFERENCES:
!
! In the routine
%SBTTL 'EDT$$EXT_CMD - EXTEND change-mode command'
GLOBAL ROUTINE EDT$$EXT_CMD ! EXTEND change-mode command
: NOVALUE =
!++
! FUNCTIONAL DESCRIPTION:
!
! Do the EXTEND change-mode command. This allows a line-mode
! command to be executed from change mode.
!
! FORMAL PARAMETERS:
!
! NONE
!
! IMPLICIT INPUTS:
!
! MESSAGE_LINE
! EXI
! CMD_BUF
! CMD_PTR
! CMD_END
! EXITD
! RCOV_MOD
! PA_STK
!
! IMPLICIT OUTPUTS:
!
! SCR_CHGD
! TXT_ONSCR
! FMT_LNPOS
! LASTMSG
! TIN_ECHOFLG
! TIN_ECHOPOS
!
! ROUTINE VALUE:
!
! NONE
!
! SIDE EFFECTS:
!
! MANY
!
!--
BEGIN
EXTERNAL ROUTINE
EDT$$SC_REVID,
EDT$$SC_NONREVID,
EDT$$SC_POSCSIF,
EDT$$FMT_CRLF,
EDT$$STOP_WKINGMSG,
EDT$$RD_JOUTXT,
EDT$$TI_WRSTR,
EDT$$TI_RDCMDLN,
EDT$$TI_INPCH,
EDT$$CHK_CC,
EDT$$MSG_TOSTR,
EDT$$OUT_FMTBUF, ! Output the format buffer
EDT$$PA_CMD, ! Parse a command
EDT$$LNM_CMD, ! Execute a line mode command
EDT$$TI_FLUSHJOUFI : NOVALUE, ! Write out the journal file's buffer
EDT$$FMT_MSG : NOVALUE, ! Output a message
EDT$$ALO_HEAP, ! Allocate heap storage
EDT$$DEA_HEAP : NOVALUE; ! Deallocate heap storage
EXTERNAL
PUT_JOU, ! force a write to journal file
MESSAGE_LINE, ! Message lines are this + 1
EXI, ! Change mode has been exited
FMT_WRRUT, ! Output format routine
TEMP_BUFFER, ! Temporary storage
CMD_BUF, ! Command line buffer
CMD_PTR, ! Pointer into command line buffer
CMD_END, ! End of current command
EXITD, ! Did we exit with the last command?
EDIT_MOD, ! Current editing mode
RCOV_MOD, ! Are we in recovery mode?
SCR_CHGD, ! screen changed
PUSH_FLAG, ! Last command was PUSH
TI_TYP, ! kind of terminal
FMT_LNPOS, ! Position on the output line
TXT_ONSCR, ! Text was written to screen
TIN_ECHOFLG, ! Echo status
TIN_ECHOPOS, ! Echo position
PA_STK, ! Parser semantic stack
PA_MORE, ! More data on command line
FMT_BOT, ! 1 = messages at bottom of screen
FMT_LCNT,
CC_DONE, ! Control-c flag
LASTMSG; ! The last message printed. 1 = None
MESSAGES ((PRERETCON, INSMEM));
LOCAL
CONT_RESP : REF BLOCK [CH$ALLOCATION (256)],
C,
TERM,
LEN;
TXT_ONSCR = 0;
EDIT_MOD = LINE_MODE;
!+
! Position the cursor to the message line.
!-
IF ((.TI_TYP NEQ TERM_HCPY) AND (.TI_TYP NEQ TERM_UNKNOWN))
THEN
BEGIN
EDT$$SC_POSCSIF (.MESSAGE_LINE + 1, 0);
FMT_LNPOS = 0;
FMT_BOT = 1;
FMT_LCNT = 0;
EDT$$SC_REVID ();
END;
!+
! Copy the remainder of the command and append <CR><LF><NUL>
! Then place the command in the rescan buffer and make it available.
!-
C = CH$MOVE (CH$DIFF (.CMD_END, .CMD_PTR), .CMD_PTR, CH$PTR (TEMP_BUFFER));
CH$MOVE (3, CH$PTR (UPLIT (%STRING (%CHAR (ASC_K_CR), %CHAR (ASC_K_LF),
%CHAR (0)))), .C);
CMD_PTR = .CMD_END;
_RSCAN (CH$PTR (TEMP_BUFFER)); ! Put command in rescan buffer
_RSCAN ($RSINI);
DO
BEGIN
IF EDT$$PA_CMD (0,0) THEN EDT$$LNM_CMD (PA_STK) ELSE TXT_ONSCR = 1;
END
UNTIL ((.PA_MORE EQL 0) OR (.EDIT_MOD EQL CHANGE_MODE) OR (EDT$$CHK_CC ()));
!+
! See if the reason we are exiting is because of a control C seen.
!-
IF ( NOT (.PA_MORE EQL 0) OR (.EDIT_MOD EQL CHANGE_MODE))
THEN
CC_DONE = 1;
!+
! Text on the screen means we have more than 2 lines of messages and that
! we need to issue the Press return to continue message.
!-
IF ((.TXT_ONSCR NEQ 0) AND (.FMT_WRRUT EQL EDT$$TI_WRSTR))
THEN
BEGIN
!+
! Allocate heap storage for the response, even though we use so much space only in /RECOVER mode,
! so that if we run out of storage during /RECOVER we will also run out in the original session.
!-
IF ( NOT EDT$$ALO_HEAP (%REF (256), CONT_RESP))
THEN
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
END
ELSE
BEGIN
IF (.RCOV_MOD EQL 0)
THEN
BEGIN
EDT$$STOP_WKINGMSG ();
!+
! Output the "Press return to continue" message and wait for ANY key
! to be pressed before refreshing the screen and returning to change mode.
!-
EDT$$FMT_CRLF ();
!+
! Don't call FMT_MSG because we don't want the bell to ring.
!-
EDT$$SC_REVID ();
EDT$$MSG_TOSTR (EDT$_PRERETCON);
EDT$$OUT_FMTBUF ();
!+
! Make sure the journal buffer has been written to the journal file,
! since we are about to wait for terminal input.
!-
EDT$$TI_FLUSHJOUFI (%C'T');
!+
! Get the next character of input, including any characters generated by
! striking a keypad key.
!-
EDT$$TI_INPCH (C);
EDT$$TI_RDCMDLN (.C, .CMD_PTR, CMD_PTR, .C, TERM);
!+
! Make sure that the echo flag and position are clear
!-
TIN_ECHOFLG = 0;
TIN_ECHOPOS = 0;
END
ELSE
EDT$$RD_JOUTXT (.CONT_RESP, LEN);
EDT$$DEA_HEAP (%REF (256), CONT_RESP);
END;
LASTMSG = 1;
IF (.PUSH_FLAG EQL 0) THEN SCR_CHGD = 1;
END;
IF (.EXITD NEQ 0) THEN EXI = 1;
PUT_JOU = 1; ! make sure the response gets written out alone
EDT$$SC_NONREVID ();
EDT$$OUT_FMTBUF ();
PUSH_FLAG = 0; ! No last command now
FMT_BOT = 0;
EDIT_MOD = CHANGE_MODE;
END; ! of routine EDT$$EXT_CMD
END
ELUDOM