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sources/init.bli
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%TITLE 'INIT - initialize'
MODULE INIT ( ! Initialize
IDENT = '3-013' ! File: INIT.BLI Edit: CJG3013
) =
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:
!
! Initialize EDT
!
! ENVIRONMENT: Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: August 6, 1979
!
! MODIFIED BY:
!
! 1-001 - Original. DJS 18-FEB-1981. This module was created by
! extracting routine EDT$$INIT from module TINPUT.
! 1-002 - Regularized the headers and arranged to call EDT$$FATAL_IOERR for I/O errors. JBS 19-Feb-1981
! 1-003 - Changed from IO_STS and IO_FNF to IOFI_NFND . JBS 19-Feb-1981
! 1-004 - Fixed module and file name. JBS 04-Mar-1981
! 1-005 - Fix the file name. JBS 11-Mar-1981
! 1-006 - Use new message codes. JBS 04-Aug-1981
! 1-007 - Check for storage exhausted when defining the permanent buffers, and return
! a value rather than printing a message if the primary input file is not found. JBS 16-Aug-1981
! 1-008 - Initialization moved from EDT$DATA to here. STS 05-Nov-1981
! 1-009 - Add some initialization of the TBCB for the main buffer. (a bug
! surfaced where the cur_line was not zero.) STS 13-Nov-1981
! 1-010 - Change this to initialize everything necessary for sharable
! image. STS 17-Nov-1981
! 1-011 - Initialize the control C data by calling EDT$$CLR_CC. JBS 29-Dec-1981
! 1-012 - Convert to fileio to open input file. STS 06-Jan-1982
! 1-013 - Remove reference to sys_prirab. STS 22-Jan-1982
! 1-014 - Autorepeat is initially on. JBS 30-Jan-1982
! 1-015 - Initialize ENB_AUTRPT. JBS 11-Feb-1982
! 1-016 - Use routine edt$workio to open workfile. STS 08-Feb-1982
! 1-017 - Initialize descriptor WF_DESC. STS 15-Feb-1982
! 1-018 - Add literals needed for callable EDT. STS 08-Mar-1982
! 1-019 - Initialize line number correctly. STS 10-Mar-1982
! 1-020 - Change CMD and JOU to OPTIONS. JBS 18-Mar-1982
! 1-021 - The file I/O routine returns a status code. Watch for EDT$_NONSTDFIL.
! JBS 26-Mar-1982
! 1-022 - Correct a typo in non-standard file handling. JBS 27-Mar-1982
! 1-023 - Don't clear EIGHT_BIT. JBS 05-Apr-1982
! 1-024 - Set up input file open flag. STS 07-Apr-1982
! 1-025 - Don't initialiaze the TBCBs -- now done by EDT$$GET_BUFPTR. JBS 08-Apr-1982
! 1-026 - Initialize JOU_VALID. JBS 09-Apr-1982
! 1-027 - Improve the message if the primary input file cannot be opened. JBS 03-Jun-1982
! 1-028 - Pass the default file name in the RHB parameter. JBS 15-Jun-1982
! 1-029 - Set CHM_FRST_ENTRY to 1 for callable EDT. SMB 01-Jul-1982
! 1-030 - Initialize LASTMSG, remove CHM_FRST_ENTRY. JBS 05-JUL-1982
! 1-031 - Take out reference to PRTC prompt. STS 07-Jul-1982
! 1-032 - Save original terminal width. STS 08-Jul-1982
! 1-033 - Change the line mode insert prompt. SMB 14-Jul-1982
! 1-034 - Remove EDT$$A_STR_CMP. JBS 19-Jul-1982
! 1-035 - Add initialization of select range. STS 06-Aug-1982
! 1-036 - Move open input file first and get out if not found and
! nocreate. STS 10-Aug-1982
! 1-037 - New implementation of defined keys. JBS 12-Aug-1982
! 1-038 - Make use of the bit masks in the options word. STS 17-Aug-1982
! 1-039 - Fix up references to EDT$M_. JBS 23-Aug-1982
! 1-040 - Zero out the help file open flag. STS 27-Aug-1982
! 1-041 - Call EDT$$INIT_IO. JBS 27-Aug-1982
! 1-042 - Initialize EDT$$G_ENB_AUTRPT in the terminal initialization. JBS 02-Sep-1982
! 1-043 - Initialize some screen structure globals. SMB 10-Oct-1982
! 1-044 - Initialize the keypad translation table. JBS 17-Oct-1982
! 1-045 - New handling of EDT$$G_SCR_REBUILD. JBS 21-Oct-1982
! 1-046 - Make edt$$wf_desc static not dynamic descriptor. STS 11-Nov-1982
! 1-047 - Initialize EDT$$A_OLD_SEL. JBS 02-Dec-1982
! 1-048 - Remove reference to EDT$$T_EXE_LNO. JBS 14-Dec-1982
! 1-049 - Initialize EDT$$G_CS_LNO. JBS 29-Dec-1982
! 1-050 - Initialize EDT$$G_TOP_SCREG, EDT$$G_BOT_SCREG. SMB 11-Jan-1983
! 1-051 - Initialize EDT$$G_RECSCRUPD. JBS 21-Jan-1983
! 1-052 - Add conditionals for WPS support. JBS 10-Feb-1983
! 3-001 - Change CH$MOVE to EDT$$CPY_STR for TOPS so we get string ptrs. GB 24-Jan-1983
! 3-002 - Initialise FMT_CUR with a real string ptr. GB 3-Feb-1983
! 3-003 - Initialise prompt strings correctly. GB 09-Feb-1983
! 3-004 - Modify call to EDT$$CALLFIO. CJG 19-Apr-1983
! 3-005 - Remove call to EDT$$INIT_IO. CJG 2-Jun-1983
! 3-006 - Remove call to EDT$$CALLFIO, and EDT$$CALLWIO. CJG 10-Jun-1983
! 3-007 - Remove <CR><LF> from front of default prompts. CJG 15-Jun-1983
! 3-008 - Change the way that filespecs are handled. CJG 22-Jun-1983
! 3-009 - Use CH$FILL to clear the data area. CJG 22-Jun-1983
! 3-010 - Call EDT$$PA_CMDLN here, after clearing database. CJG 27-Jun-1983
! 3-011 - Deal with the CREATE command (EDT$M_NEWFILE). CJG 12-Jul-1983
! 3-012 - Preset CTRL_T to 1. CJG 4-Jan-1984
! 3-013 - Add FMT_FREE to improve speed of format routines. CJG 11-Jan-1984
!--
%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!
REQUIRE 'EDTSRC:TRAROUNAM';
FORWARD ROUTINE
EDT$$INIT;
!
! INCLUDE FILES:
!
REQUIRE 'EDTSRC:EDTREQ';
LIBRARY 'EDTSRC:SUPPORTS';
LIBRARY 'EDTSRC:KEYPADDEF';
!
! MACROS:
!
! NONE
!
! EQUATED SYMBOLS:
!
! NONE
!
LITERAL
NO_SELECT = -1;
!
!
! OWN STORAGE:
!
! NONE
!
! EXTERNAL REFERENCES:
!
! In the routine
%SBTTL 'EDT$$INIT - Initialize EDT'
GLOBAL ROUTINE EDT$$INIT ! Initialize EDT
=
!++
! FUNCTIONAL DESCRIPTION:
!
! Initialize EDT
!
! FORMAL PARAMETERS:
!
! NONE
!
! IMPLICIT INPUTS:
!
! LNO_EMPTY
! CUR_BUF
! INP_NAM
! IOFI_NFND
!
! IMPLICIT OUTPUTS:
!
! Most of EDT's global variables
!
! ROUTINE VALUE:
!
! 0 Primary input file was not found
! 1 Primary input file was found
! 2 Primary input file does not have standard text format
! 3 Primary input file open failure or other fatal error--abort
!
! SIDE EFFECTS:
!
! Initializes most variables.
! Opens the work file and terminal.
! Establishes the MAIN and PASTE buffers, or fails.
! Any I/O errors are fatal.
!
!--
BEGIN
EXTERNAL ROUTINE
EDT$FILEIO,
EDT$$WF_OPN,
EDT$$PA_CMDLN : NOVALUE, ! Parse the initial command line
EDT$$FMT_MSG,
EDT$$TI_OPN,
EDT$$ALO_HEAP, ! allocate heap storage for strings
EDT$$GET_BUFPTR,
EDT$$FND_BUF,
EDT$$NEW_BUF,
EDT$$CLR_CC : NOVALUE, ! Clear control C state
EDT$$FIOPN_ERR : NOVALUE; ! Report a file open error
EXTERNAL LITERAL
EDT$M_RECOVER,
EDT$M_NOCREATE,
EDT$M_NEWFILE,
EDT$K_OPEN_INPUT,
EDT$K_INPUT_FILE;
EXTERNAL
AAAAAA, ! First and last locations to clear
ZZZZZZ,
TOP_SCREG, ! Top of scrolling region
BOT_SCREG, ! Bottom of scrolling regon
LNO_EMPTY : LN_BLOCK, ! Empty record
TOP_LN : LN_BLOCK, ! Top screen record
LASTMSG, ! The last message printed
WORKCOUNT, ! Working message flag
MESSAGE_LINE, ! Line number for messages
INPUT_OPN, ! input file open flag
CUR_BUF : REF TBCB_BLOCK, ! Current text buffer control block.
INP_NAM, ! Name of input file.
PRV_BUF, ! Previous tbcb.
PST_BUF, ! Paste buffer tbcb.
EDIT_MOD,
EDIT_DFLTMOD,
SAV_CNT,
PRV_LN,
CTRL_T,
NOS,
SEA_BEG,
RPT,
FNF_MSGFLG,
TRUN,
TI_WID,
SAV_TIWID,
KPAD,
WD_WRAP,
SCLL_TOP,
SCLL_BOT,
SCR_LNS,
CS_LNO,
SCR_REBUILD,
US_ENT : VECTOR,
US_TXT : VECTOR,
RCOV_MOD,
DIR_MOD,
SEL_POS,
SUMRY,
PARTYP,
K_AUTRPT,
WK_GRTSTBUK,
FMT_CUR,
FMT_FREE,
FMT_WRRUT,
PA_CURTOK,
PMT_LINE : VECTOR,
! PMT_KPD : VECTOR,
! PMT_NOKPD : VECTOR,
PMT_HCCHG : VECTOR,
PMT_INS : VECTOR,
! PMT_INSN : VECTOR,
PMT_QUERY : VECTOR,
FMT_BUF,
EDT$$TI_WRLN,
CMD_BUF,
IOFI_NFND, ! 1 = open failed due to file not found
WF_DESC : BLOCK [8],
OPTIONS : BITVECTOR [36]; ! Options bits, bit 0 = /RECOVER
MESSAGES ((INSMEM, INPFILOPN));
LOCAL
LEN,
NEW,
RETURN_VALUE,
IO_STS;
RETURN_VALUE = 1; ! Assume success
!+
! Initialize a lot of variables. This is done by calling CH$FILL to
! copy zeros throughout the data area. (See DATA.BLI)
!-
AAAAAA = 0; ! Clear the first word
CH$FILL (0, ZZZZZZ - AAAAAA, CH$PTR (AAAAAA, 0, 36));
WF_DESC [DSC$W_LENGTH] = 512;
MOVELINE (LNO_EMPTY, TOP_LN);
EDIT_MOD = LINE_MODE;
EDIT_DFLTMOD = LINE_MODE;
SAV_CNT = 3;
WORKCOUNT = -1; ! No working message
LASTMSG = 1; ! No last message
NOS = 1;
SEA_BEG = 1;
RPT = 1;
TRUN = 1;
KPAD = 1;
CTRL_T = 1;
TI_WID = 80;
MESSAGE_LINE = 22;
WD_WRAP = 256;
SCLL_TOP = 7;
SCLL_BOT = 14;
SCR_LNS = 22;
!+
! Set scrolling boundaries to 99 to ensure that they get set the
! first time thru change mode.
!-
TOP_SCREG = 99;
BOT_SCREG = 99;
PRV_LN = 999;
SEL_POS = NO_SELECT;
SCR_REBUILD = 1;
CS_LNO = -1;
DIR_MOD = 1;
SUMRY = 1;
PARTYP = 1;
K_AUTRPT = 1;
WK_GRTSTBUK = 1;
PA_CURTOK = CMD_BUF;
!+
! Parse the initial command line and set recovery mode accordingly.
!-
EDT$$PA_CMDLN ();
RCOV_MOD = ((.OPTIONS AND EDT$M_RECOVER) NEQ 0);
!+
! Open the terminal. If it fails, abort.
!-
EDT$$TI_OPN ();
!+
! Attempt open first
!-
FNF_MSGFLG = 1;
FMT_CUR = CH$PTR (FMT_BUF,, BYTE_SIZE);
FMT_FREE = FMT_BUFLEN;
FMT_WRRUT = EDT$$TI_WRLN;
EDT$$CLR_CC ();
!+
! Make sure the command wasn't CREATE file/NOCREATE
!-
IF ((.OPTIONS AND EDT$M_NEWFILE) EQL 0)
THEN
BEGIN
IF ((.OPTIONS AND EDT$M_NOCREATE) NEQ 0)
THEN
BEGIN
IO_STS = 0;
IOFI_NFND = 1; ! Pretend not found error
END
!+
! Open the input file if not CREATE command.
!-
ELSE
IO_STS = EDT$FILEIO (EDT$K_OPEN_INPUT, EDT$K_INPUT_FILE, INP_NAM);
IF ( NOT .IO_STS)
THEN
BEGIN
IF .IOFI_NFND
THEN
BEGIN
RETURN_VALUE = 0;
IF ((.OPTIONS AND EDT$M_NOCREATE) NEQ 0) THEN RETURN (0);
END
ELSE
BEGIN
EDT$$FIOPN_ERR (EDT$_INPFILOPN, INP_NAM);
RETURN_VALUE = 3;
END;
END
ELSE
INPUT_OPN = 1; ! indicate input file open
END;
!+
! Set the default prompts. Note that leading <CR><LF> is not needed on TOPS-20.
!-
PMT_LINE [0] = 1;
CH$MOVE (1, CH$PTR (UPLIT (%STRING ('*'))),
CH$PTR (PMT_LINE [1],, BYTE_SIZE));
PMT_HCCHG [0] = 2;
CH$MOVE (2, CH$PTR (UPLIT (%STRING ('C', '*'))),
CH$PTR (PMT_HCCHG [1],, BYTE_SIZE));
PMT_INS [0] = 12;
CH$MOVE (12, CH$PTR (UPLIT (%STRING (' '))),
CH$PTR (PMT_INS [1],, BYTE_SIZE));
! PMT_INSN [0] = 0;
! PMT_INSN [1] = 0;
PMT_QUERY [0] = 1;
CH$MOVE (1, CH$PTR (UPLIT (%STRING ('?'))),
CH$PTR (PMT_QUERY [1],, BYTE_SIZE));
! PMT_KPD = 0;
! PMT_NOKPD = 0;
!+
! Allocate some VM for the string such as page and end text and entity specifications
!-
LEN = 10;
IF EDT$$ALO_HEAP (LEN, US_TXT [0]) ! end text
THEN
BEGIN
.US_TXT [0] = .LEN - 5;
CH$MOVE (.LEN - 5, CH$PTR (UPLIT (%STRING ('[EOB]'))),
CH$PTR (.US_TXT [0] + 1,, BYTE_SIZE));
END
ELSE
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
LEN = 9;
IF EDT$$ALO_HEAP (LEN, US_TXT [1]) ! page text
THEN
BEGIN
.US_TXT [1] = .LEN - 5;
CH$MOVE (.LEN - 5, CH$PTR (UPLIT (%STRING ('<FF>'))),
CH$PTR (.US_TXT [1] + 1,, BYTE_SIZE));
END
ELSE
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
LEN = 11;
IF EDT$$ALO_HEAP (LEN, US_ENT [0]) ! word entity
THEN
BEGIN
.US_ENT [0] = .LEN - 5;
CH$MOVE (.LEN - 5, CH$PTR (UPLIT (%STRING (' ', %CHAR( 9, 10, 11, 12, 13)))),
CH$PTR (.US_ENT [0] + 1,, BYTE_SIZE));
END
ELSE
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
LEN = 8;
IF EDT$$ALO_HEAP (LEN, US_ENT [1]) ! sent entity
THEN
BEGIN
.US_ENT [1] = .LEN - 5;
CH$MOVE (.LEN - 5, CH$PTR (UPLIT (%STRING ('.', '!', '?'))),
CH$PTR (.US_ENT [1] + 1,, BYTE_SIZE));
END
ELSE
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
LEN = 7;
IF EDT$$ALO_HEAP (LEN, US_ENT [2]) ! sect entity
THEN
BEGIN
.US_ENT [2] = .LEN - 5;
CH$MOVE (.LEN - 5, CH$PTR (UPLIT (%CHAR (13, 13))),
CH$PTR (.US_ENT [2] + 1,, BYTE_SIZE));
END
ELSE
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
LEN = 6;
IF EDT$$ALO_HEAP (LEN, US_ENT [3]) ! page entity
THEN
BEGIN
.US_ENT [3] = .LEN - 5;
CH$MOVE (.LEN - 5, CH$PTR (UPLIT (%CHAR (12))),
CH$PTR (.US_ENT [3] + 1,, BYTE_SIZE));
END
ELSE
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
!+
! Save the terminal width gotten from the operating system
!-
SAV_TIWID = .TI_WID;
!+
! Open the workfile. If it fails, abort.
!-
EDT$$WF_OPN ();
!+
! Open the paste text buffer.
!-
IF ( NOT EDT$$FND_BUF (CH$PTR (UPLIT ('PASTE')), 5))
THEN
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
PST_BUF = .CUR_BUF;
!+
! And the MAIN text buffer.
!-
IF ( NOT EDT$$GET_BUFPTR (CH$PTR (UPLIT ('MAIN')), 4, CUR_BUF, NEW))
THEN
BEGIN
EDT$$FMT_MSG (EDT$_INSMEM);
RETURN (3);
END;
PRV_BUF = .CUR_BUF;
IF .INPUT_OPN THEN CUR_BUF [TBCB_INPUT_RAB] = 1;
EDT$$NEW_BUF ();
RETURN (.RETURN_VALUE);
END; ! of routine EDT$$INIT
END
ELUDOM