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| Title: | DEC Pascal Notes |
| Notice: | See note 1 for kits. Bug reports to CLT::DEC_PASCAL_BUGS |
| Moderator: | TLE::REAGAN |
|
| Created: | Sat Jan 25 1986 |
| Last Modified: | Tue Jun 03 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2675 |
| Total number of notes: | 13409 |
2673.0. "How to flush terminal output without using writeln?" by SNOC01::63620::GRAHAM (Russell GRAHAM) Tue May 13 1997 07:17
Hi,
I have a customer who is migrating from OVMS VAX (V6.0) to OVMS AXP (V7.1).
They have an application written largely in Pascal with some macro-32.
They have a mechanism to control the user interface screens on VT terminals,
where the pascal code does a lot of write(); statements
to format information on the screen, paint menu options, etc.
Then they call a macro routine that does a QIOW read with prompt call.
They "dig" into some internal data structures to get the buffer start address
and buffer next-to-add pointer that pascal maintains (where all the text in
previous write statements is stored) and provide this to the QIOW to form the
prompt.
In effect they need never use a writeln to flush the output to the screen.
This is old code and has always worked on the VAX through various versions
of OVMS and the Pascal compiler.
But now, it won't work on the alpha... surprise!
There is a lot of code that uses this mechanism, so they don't want to recode
it all.
What is required, is either:
- the equivant of the "magic numbers" used on the VAX ,
by the routine mu_prmptrd.
Refer to the attached list file of the macro code.
Refer to lines 01c0, 01c4.
- some way to flush the text held in the buffer without doing a writeln.
(The writeln adds a cr,lf which would mess up the screen)
- an alternate mechanism ...
Any help or comments would be appreciated.
Russell Graham
NSIS, Sydney
@SNO
----------------------------------------------------------------------
MU_TRMIO
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0000 1 .TITLE MU_TRMIO
0000 2 ;
0000 3 ; Modifications:
0000 4 ;
0000 5 ;
0000 6 ; MEC
27-JUL-93 Add handling of F6-F20 keys in MU_PRMPT.
0000 7 ;PMP1323 MEC
27-AUG-93 Commented out go_f7 to go_f20.
0000 8 ;
0000 9 ;++
0000 10 ; This module contains
subroutines used for getting input from a CRT.
0000 11 ;
0000 12 ; 1) MU_TINIT
- assign channel to SYS$INPUT, and set up.
0000 13 ; A
channel is assigned to SYS$INPUT.
0000 14 ; GETDVI
is used to get the device class.
0000 15 ; If the
device class is "terminal", then
0000 16 ;
a sensemode QIO is used to get the chars.
0000 17 ;
If the terminal is a VT100 then
0000 18 ;
the terminal is set as /ESCAPE,
0000 19 ;
and the type flag is set accordingly.
0000 20 ;
0000 21 ; The input to
MU_TINIT is the length of reads to do for
0000 22 ; future calls to
MU_PRMPTRD, and an array showing the
0000 23 ; code returns
wanted for the different type of terminators.
0000 24 ; these codes are
assumed to be in the order of the
0000 25 ; go codes as
enumerated below ( empty, text, up, ... )
0000 26 ;
0000 27 ; 2) MU_PRMPTRD
- get data from the terminal.
0000 28 ;
- reads data into the users buffer.
0000 29 ;
- returns the length read, and an indication
0000 30 ;
of any special return.
0000 31 ;
- optionally timesout
0000 32 ;
- optionally clears type ahead buffer
0000 33 ;
- optionally does not echo the input
0000 34 ; function MU_PRMPTRD (
var pfv : text;
0000 35 ;
var buffer : varying [n] of char;
0000 36 ;
timeout : integer := 0 ;
0000 37 ;
clear_type : boolean := false;
0000 38 ;
no_echo : boolean := false)
0000 39 ;
: mu_response ;
0000 40 ;
0000 41 ; 3) MU_EXHAN
- exit handler to set terminal back to
0000 42 ;
no escape.
0000 43 ;
0000 44 ; 4) MU_MUMAKE
- change lx_buffer ( packed ) to mu_text
0000 45 ; mu_mumake (
lx_buffer, lx_length, var mu_text )
0000 46 ; 5) MU_LXMAKE
- change mu_text ( varying) to lx_buffer
0000 47 ; mu_lxmake (
mu_text, var lx_buffer, var lx_length )
0000 48 ;--
MU_TRMIO
12-MAY-1997 16:43:05 VAX MACRO V5.4-3 Page 2
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0000 50 $DCDEF
0000 51 $DVIDEF
0000 52 USEFUL_MACROS
0000 53 ;
0000 54 ; Data area
00000009 0000 55 asc_tab = 9
0000000A 0000 56 asc_lf = 10
0000000B 0000 57 asc_vt = 11
0000000C 0000 58 asc_ff = 12
0000000D 0000 59 asc_cr = 13
0000001A 0000 60 asc_eof = 26
0000001B 0000 61 asc_esc = 27
0000 62 ;
00000000 0000 63 go_empty = 0
00000001 0000 64 go_nowhere = 1
00000002 0000 65 go_north = 2
00000003 0000 66 go_south = 3
00000004 0000 67 go_east = 4
00000005 0000 68 go_west = 5
00000006 0000 69 go_away = 6
00000007 0000 70 go_pf1 = 7
00000008 0000 71 go_pf2 = 8
00000009 0000 72 go_pf3 = 9
0000000A 0000 73 go_pf4 = 10
0000000B 0000 74 go_timed = 11
0000000C 0000 75 go_f6 = 12
0000000D 0000 76 go_f7 = 13
0000000E 0000 77 go_f8 = 14
0000000F 0000 78 go_f9 = 15
00000010 0000 79 go_f10 = 16
00000011 0000 80 go_f11 = 17
00000012 0000 81 go_f12 = 18
00000013 0000 82 go_f13 = 19
00000014 0000 83 go_f14 = 20
00000015 0000 84 go_f15 = 21
00000016 0000 85 go_f16 = 22
00000017 0000 86 go_f17 = 23
00000018 0000 87 go_f18 = 24
00000019 0000 88 go_f19 = 25
0000001A 0000 89 go_f20 = 26
0000 90 ;
0000000C 0000 91 go_max = go_f6
; apply only keys in use
0000000D 0000 92 go_length = go_max + 1
0000 93 ;
0000 94 ; Read write data
0000 95 ;
00000000 96 .PSECT
$LOCAL,PIC,USR,CON,REL,LCL,NOSHR,NOEXE,RD,WRT,LONG
0000 97 ;
0000 98 DESBLK:
; exit handler control block
00000000 0000 99 .LONG 0
; link
00000000 0004 100 .LONG 0
; will be .ADDRESS MU_EXHAN
00000001 0008 101 .LONG 1
; number of args ( the status address)
00000000 000C 102 .LONG 0
; will be .ADDRESS EST
00000001 0010 103 EST: .LONG 1
; exit status
00000000 00000000 0014 104 TERMCHR:.LONG 0,0
; init term characteristics
0000 001C 105 CHAN: .WORD 0
; channel to SYS$INPUT
0000 001E 106 TYPE: .WORD 0
; 0 = not known terminal
MU_TRMIO
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0020 107 ;
; 1 = VT100 /VT52
0000 0020 108 TYPE2: .WORD 0
; 1 = VT100
0000002F 0022 109 RETURNS: .BLKB go_length
; returns for all the go codes.
002F 110 ;
002F 111 ; Read only data
002F 112 ;
00000000 113 .PSECT
$CODE,PIC,USR,CON,REL,LCL,SHR,EXE,RD,NOWRT,LONG
0000 114 ;
FFFFFFFF 00000000 0000 115 TERMBUF: .LONG 0,-1
; terminate on all control chars
0008 116
; including TAB,LF,VT,FF,BS
0008 117 ONETERMS:
00 0A 0008 118 .BYTE asc_lf, go_empty
; return go_empty if its an LF
04 09 000A 119 .BYTE asc_tab, go_east
; return go_east if its a TAB
06 1A 000C 120 .BYTE asc_eof, go_away
01 00 000E 121 .BYTE 0, go_nowhere
0010 122 TWOTERMS:
02 41 0010 123 .BYTE ^A"A", go_north
03 42 0012 124 .BYTE ^A"B", go_south
04 43 0014 125 .BYTE ^A"C", go_east
05 44 0016 126 .BYTE ^A"D", go_west
07 50 0018 127 .BYTE ^A"P", go_pf1
08 51 001A 128 .BYTE ^A"Q", go_pf2
09 52 001C 129 .BYTE ^A"R", go_pf3
0A 53 001E 130 .BYTE ^A"S", go_pf4
01 00 0020 131 .BYTE 0, go_nowhere
0022 132
0022 133
; { MAL272 vvvvvvvvvv }
0022 134 ; We call them 'fourterms', even
though there are 5 characters input from the
0022 135 ; terminal. We just don't
reference the ESC character in this table, as the code
0022 136 ; skips over it for us.
0022 137 FOURTERMS:
0C 7E 37 31 0022 138 .BYTE ^A"1", ^A"7",
^A"~", go_f6
0026 139 ; .BYTE ^A"1", ^A"8",
^A"~", go_f7 {Not yet required PMP1323vv}
0026 140 ; .BYTE ^A"1", ^A"9",
^A"~", go_f8
0026 141 ; .BYTE ^A"2", ^A"0",
^A"~", go_f9
0026 142 ; .BYTE ^A"2", ^A"1",
^A"~", go_f10
0026 143 ; .BYTE ^A"2", ^A"3",
^A"~", go_f11
0026 144 ; .BYTE ^A"2", ^A"4",
^A"~", go_f12
0026 145 ; .BYTE ^A"2", ^A"5",
^A"~", go_f13
0026 146 ; .BYTE ^A"2", ^A"6",
^A"~", go_f14
0026 147 ; .BYTE ^A"2", ^A"8",
^A"~", go_f15
0026 148 ; .BYTE ^A"2", ^A"9",
^A"~", go_f16
0026 149 ; .BYTE ^A"3", ^A"1",
^A"~", go_f17
0026 150 ; .BYTE ^A"3", ^A"2",
^A"~", go_f18
0026 151 ; .BYTE ^A"3", ^A"3",
^A"~", go_f19
0026 152 ; .BYTE ^A"3", ^A"4",
^A"~", go_f20 { PMP1323 ^^^^^^^^^ }
01 00 0026 153 .BYTE 0, go_nowhere
; { MAL272 ^^^^^^^^^^^ }
0028 154 ;
0028 155 ;
54 55 50 4E 49 24 53 59 53 0028 156 DEVNAM: .ASCII /SYS$INPUT/
; The davice name.
00000009 0031 157 DEVNAM_L = .-DEVNAM
MU_TRMIO
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27-AUG-1993 17:16:41 [SOURCE.MENU]TERMIO.MAR;22 (3)
0031 159 ;++
0031 160 ; MU_TINIT - assign
a channel to SYS$INPUT
0031 161 ; get
the device characteristics
0031 162 ; set
terminal as /ESCAPE
0031 163 ; set up
an exit handler to set characteristics
0031 164 ; as
/NOESCAPE.
0031 165 ; If the
terminal is not a VT100/VT52, release channel.
0031 166 ;--
003C 0031 167 .ENTRY MU_TINIT,^M<R2,R3,R4,R5>
; Assign channel, set characteristics
0000001E'GF B4 0033 168 CLRW g^TYPE
; assume unknown terminal.
00000022'GF 04 BC 0D 28 0039 169 MOVC3 #go_length,
@4(AP), - ; set up the return codes
0042 170 g^RETURNS
E3 AF 9F 0042 171 PUSHAB DEVNAM
; make a descriptor for the name.
09 DD 0045 172 PUSHL #DEVNAM_L
; ( SYS$INPUT )
50 5E D0 0047 173 MOVL SP, R0
004A 174 $ASSIGN_S
CHAN=CHAN,- ; Get a channel to SYS$INPUT.
004A 175 DEVNAM = (R0)
01 50 E8 005D 176 BLBS R0,10$
; if LBC fail
04 0060 177 RET
0061 178 ;
52 5E D0 0061 179 10$: MOVL SP, R2
; Where to get the device class.
5E 000000C8 8F C2 0064 180 SUBL #200, SP
; room for itmlst
51 5E D0 006B 181 MOVL SP, R1
81 04 B0 006E 182 MOVW #4, (R1)+
; fill in item list
81 04 B0 0071 183 MOVW #DVI$_DEVCLASS,
(R1)+ ; want the device class.
81 62 DE 0074 184 MOVAL (R2), (R1)+
; place for buffer
81 04 A2 DE 0077 185 MOVAL 4(R2), (R1)+
; place for buffer length
81 D4 007B 186 CLRL (R1)+
; terminator.
51 5E D0 007D 187 MOVL SP, R1
0080 188 $GETDVI_S
CHAN=CHAN,-
0080 189 EFN =
#1,-
0080 190 ITMLST =
(R1)
39 50 E9 009A 191 BLBC R0, 200$
009D 192 $WAITFR_S EFN= #1
00000042 8F 62 D1 00A6 193 CMPL (R2), #DC$_TERM
; is it a terminal ?
03 13 00AD 194 BEQL 150$
; if EQL no
00B1 31 00AF 195 BRW 1000$
; else no.
50 5E D0 00B2 196 150$: MOVL SP, R0
; use stack as IOSB
00B5 197 $QIOW_S -
; Now sense the characteristics.
00B5 198 EFN = #1,-
00B5 199 FUNC =
#IO$_SENSEMODE,-
00B5 200 CHAN = CHAN,-
00B5 201 IOSB = (R0),-
00B5 202 P1 = (R2),-
; set the chars
00B5 203 P2 = #8
5A 50 E9 00D6 204 200$: BLBC R0, 500$
; if LBC fail
50 6E 3C 00D9 205 MOVZWL (SP), R0
; Check on the IOSB
54 50 E9 00DC 206 BLBC R0, 500$
00000020'EF 01 90 00DF 207 MOVB #1, TYPE2
; set as VT100
60 8F 01 A2 91 00E6 208 CMPB 1(R2),
#DT$_VT100 ; is it a VT100 ?
0D 13 00EB 209 BEQL 210$
; if EQL yes
00000020'EF 94 00ED 210 CLRB TYPE2
; set as VT52
40 8F 01 A2 91 00F3 211 CMPB 1(R2), #DT$_VT52
; is it VT52
69 12 00F8 212 BNEQ 1000$
; if NEQ no.
00000014'GF 62 7D 00FA 213 210$: MOVQ (R2), g^TERMCHR
; set the initial characteristics
0000001E'GF B6 0101 214 INCW g^TYPE
53 04 A2 00000000'8F E2 0107 215 BBSS #TT$V_ESCAPE, -
; branch if already escape
MU_TRMIO
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27-AUG-1993 17:16:41 [SOURCE.MENU]TERMIO.MAR;22 (3)
0110 216 4(R2), 1000$
;
00000004'EF 0000017E'EF 9E 0110 217 MOVAB MU_EXHAN, DESBLK
+ 4 ; set up the DESBLK ( do so now to
0000000C'EF 00000010'EF DE 011B 218 MOVAL EST, DESBLK + 12
; make code shareable )
0126 219 $DCLEXH_S -
; declare an exit handler to
0126 220 DESBLK =
g^DESBLK ; switch back the chars.
2D 50 E9 0133 221 500$: BLBC R0, 1000$
50 5E D0 0136 222 MOVL SP, R0
0139 223 $QIOW_S -
; Now sense the characteristics.
0139 224 EFN = #1,-
0139 225 FUNC =
#IO$_SETMODE,-
0139 226 CHAN = CHAN,-
0139 227 IOSB = (R0),-
0139 228 P1 = (R2),-
; set the chars
0139 229 P2 = #8
06 50 E9 015A 230 BLBC R0, 1000$
; if LBC fail
50 6E 3C 015D 231 MOVZWL (SP), R0
; Check on the IOSB
00 50 E9 0160 232 BLBC R0, 1000$
13 0000001E'GF E8 0163 233 1000$: BLBS g^TYPE, 2000$
; if all o.k.
50 DD 016A 234 PUSHL R0
016C 235 $DASSGN_S CHAN =
CHAN
50 8E D0 017A 236 MOVL (SP)+, R0
04 017D 237 2000$: RET
; And that is that.
MU_TRMIO
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27-AUG-1993 17:16:41 [SOURCE.MENU]TERMIO.MAR;22 (4)
017E 239 ;++
017E 240 ; MU_EXHAN is an exit
handler set up to set the terminal as NO ESCAPE
017E 241 ;
017E 242 ; It is only set up to be
called if the terminal has been set as
017E 243 ; ESCAPE by MU_TINIT.
017E 244 ;--
0000 017E 245 MU_EXHAN: .WORD ^M<>
5E 08 C2 0180 246 SUBL #8, SP
50 5E D0 0183 247 MOVL SP, R0
; use stack as IOSB
0186 248 $QIOW_S -
; Now sense the characteristics.
0186 249 EFN = #1,-
0186 250 FUNC =
#IO$_SETMODE,-
0186 251 CHAN = CHAN,-
0186 252 IOSB = (R0),-
0186 253 P1 = g^TERMCHR,-
; set the chars
0186 254 P2 = #8
50 01 D0 01AB 255 1000$: MOVL #1,R0
04 01AE 256 RET
MU_TRMIO
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00000004 01AF 258 PFVARG = 4
00000008 01AF 259 BUARG = PFVARG + 4
0000000C 01AF 260 TIMARG = BUARG + 4
00000010 01AF 261 CLTARG = TIMARG + 4
00000014 01AF 262 ECHOARG = CLTARG + 4
0000000C 01AF 263 FCBOFF = 12
FFFFFFE8 01AF 264 FCBRECBEG = -24
FFFFFFEC 01AF 265 FCBRECCUR = -20
01AF 266 ;
03FC 01AF 267 .ENTRY
MU_PRMPTRD,^M<R2,R3,R4,R5,R6,R7,R8,R9>; read data.
50 08 BC DE 01B1 268 MOVAL @BUARG(AP), R0
; point to the varying n of char
01B5 269
; R0 points to a descriptor.
59 60 3C 01B5 270 MOVZWL (R0), R9
; get ret length for data
58 04 A0 D0 01B8 271 MOVL 4(R0), R8
; and R8 the varying string
51 04 BC DE 01BC 272 MOVAL @PFVARG(AP), R1
; point to the pascal file variable
51 0C B1 DE 01C0 273 MOVAL @FCBOFF(R1), R1
; point to the FCB
57 E8 B1 DE 01C4 274 MOVAL @FCBRECBEG(R1),
R7 ; R7 points to prompt buffer
E8 A1 A3 01C8 275 SUBW3 FCBRECBEG(R1),-
EC A1 01CB 276 FCBRECCUR(R1),-
56 01CD 277 R6
; Length of output/prompt buffer
E8 A1 D0 01CE 278 MOVL FCBRECBEG(R1),-
EC A1 01D1 279 FCBRECCUR(R1)
; Reset the buffer
68 B4 01D3 280 CLRW (R8)
; string starts as a zero.
39 0000001E'GF E8 01D5 281 BLBS g^TYPE, 5$
; branch if terminal
01DC 282
; make descriptor
67 3F 01DC 283 PUSHAW (R7)
; push address of output buffer
7E 56 3C 01DE 284 MOVZWL R6,-(SP)
; push length
6E DF 01E1 285 PUSHAL (SP)
00000000'GF 01 FB 01E3 286 CALLS
#1,g^LIB$PUT_OUTPUT ;
16 50 E9 01EA 287 BLBC R0, 3$
; branch on error
02 A8 3F 01ED 288 PUSHAW 2(R8)
; make descriptor
59 DD 01F0 289 PUSHL R9
68 3F 01F2 290 PUSHAW (R8)
00 DD 01F4 291 PUSHL #0
08 AE DF 01F6 292 PUSHAL 8(SP)
00000000'GF 03 FB 01F9 293 CALLS
#3,g^LIB$GET_INPUT ; get the input
05 50 E8 0200 294 BLBS R0, 1$
; branch on success
52 06 D0 0203 295 3$: MOVL #go_away, R2
; set as EOF
0A 11 0206 296 BRB 2$
52 01 D0 0208 297 1$: MOVL #go_nowhere, R2
; return go nowhere
68 B5 020B 298 TSTW (R8)
03 12 020D 299 BNEQ 2$
52 00 D0 020F 300 MOVL #go_empty, R2
00FF 31 0212 301 2$: BRW 1050$
0215 302
52 06 D0 0215 303 5$: MOVL #go_away, R2
; Assume its end of file
51 D4 0218 304 CLRL R1
; assume not escape
7E 7C 021A 305 CLRQ -(SP)
; Iosb on the stack
50 5E D0 021C 306 MOVL SP,R0
55 00000000'8F D0 021F 307 MOVL #IO$_READPROMPT,
R5
51 FDD6 CF DE 0226 308 MOVAL TERMBUF, R1
; set terminators
54 D4 022B 309 CLRL R4
; set as no timeout
03 6C B1 022D 310 CMPW (AP), #TIMARG/4
; enough arguments for time
1F 19 0230 311 BLSS 100$
; branch if no
54 0C BC D0 0232 312 MOVL @TIMARG(AP), R4
; get the time argument
19 13 0236 313 BEQL 100$
; if eql then not timed
00 55 00000000'8F E2 0238 314 BBSS #IO$V_TIMED, R5,
80$ ; set tas timed.
MU_TRMIO
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04 6C B1 0240 315 80$: CMPW (AP), #CLTARG/4
; enough args for clear type ahead ?
0C 19 0243 316 BLSS 100$
; if LSS no
08 10 BC E9 0245 317 BLBC @CLTARG(AP),
100$ ; branch if not to clear.
00 55 00000000'8F E2 0249 318 BBSS #IO$V_PURGE, R5,
100$ ; set to purge type ahead.
05 6C B1 0251 319 100$: CMPW (AP), #ECHOARG/4
; check for no_echo arg
0D 19 0254 320 BLSS 102$
; branch if no
14 BC 95 0256 321 TSTB @ECHOARG(AP)
08 13 0259 322 BEQL 102$
; if eql then echo is on
EE 55 00000000'8F E2 025B 323 BBSS #IO$V_NOECHO,
R5, 100$ ; set to purge type ahead.
0263 324 .SHOW MEB
0263 325 102$: $QIOW_S -
; Issue read, no terminators
0263 326 EFN = #1,-
0263 327 FUNC = R5,-
0263 328 IOSB = (R0),-
0263 329 CHAN = CHAN,-
0263 330 P1=2(R8),-
; address of input buffer
0263 331 P2=R9,-
; size of input buffer
0263 332 P3=R4,-
; timeout
0263 333 P4=R1,-
; address of terminator mask
0263 334 P5=R7,-
; address of prompt buffer
0263 335 P6=R6
; length of prompt buffer
56 DD 0263 PUSHL R6
57 DD 0265 PUSHL R7
51 DD 0267 PUSHL R1
54 DD 0269 PUSHL R4
59 DD 026B PUSHL R9
02 A8 9F 026D PUSHAB 2(R8)
7E 7C 0270 CLRQ -(SP)
60 9F 0272 PUSHAB (R0)
7E 55 3C 0274 MOVZWL R5,-(SP)
7E 0000001C'EF 3C 0277 MOVZWL
CHAN,-(SP)
01 DD 027E PUSHL #1
00000000'GF 0C FB 0280 CALLS
#12,G^SYS$QIOW
0287 336 ;;; BLBC R0, 1020$
; if LBC fails
0287 337 TEST_AND_BR_ON_FAIL R0,
1020$, 3000$
17 50 E8 0287 BLBS R0, 30002$
50 DD 028A PUSHL R0
6E DF 028C PUSHAL (SP)
00000347'EF 3F 028E PUSHAW 3000$
00000000'GF 02 FB 0294 CALLS #2,
g^LG_SS_ELOGIT
50 8ED0 029B POPL R0
0065 31 029E BRW 1020$
02A1 30002$:
02A1 338 .NOSHOW MEB
50 6E 3C 02A1 339 MOVZWL (SP), R0
; Check the IOSB - may fail then
52 0B D0 02A4 340 MOVL #go_timed, R2
; assume timed out.
0000'8F 50 B1 02A7 341 CMPW R0, #SS$_TIMEOUT
; timed out ?
58 13 02AC 342 BEQL 1020$
; if EQL yes
52 06 D0 02AE 343 MOVL #go_away, R2
; assume fail - eof.
52 50 E9 02B1 344 BLBC R0, 1020$
; if LBC fail
52 01 D0 02B4 345 MOVL #go_nowhere, R2
; assume its normal
51 02 AE 3C 02B7 346 MOVZWL 2(SP), R1
; get offset to terminator
51 58 C0 02BB 347 ADDL R8, R1
51 02 C0 02BE 348 ADDL #2, R1
50 FD43 CF 9E 02C1 349 MOVAB ONETERMS, R0
01 06 AE B1 02C6 350 CMPW 6(SP), #1
; normal terminator length ?
3A 19 02CA 351 BLSS 1020$
; if LSS buffer full
MU_TRMIO
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28 13 02CC 352 BEQL 900$
; if EQL 1 character
02CE 353
; else escape sequence.
51 D6 02CE 354 INCL R1
; point past escape
50 FD3C CF 9E 02D0 355 MOVAB TWOTERMS, R0
02 06 AE B1 02D5 356 CMPW 6(SP), #2
; 2 char escape sequence ?
1B 13 02D9 357 BEQL 900$
; if EQL yes
05 06 AE B1 02DB 358 CMPW 6(SP), #5
; is it 5 char esc sequence ?
08 12 02DF 359 BNEQ 800$
; no, so jump to compare chars
5B 8F 81 91 02E1 360 CMPB (R1)+, #^A"["
; possibles are <ESC>[?
39 13 02E5 361 BEQL 1900$
; if EQL compare chars
1D 11 02E7 362 BRB 1020$
; must be 5 char unknown, give up
02E9 363
5B 8F 81 91 02E9 364 800$: CMPB (R1)+, #^A"["
; possibles are <ESC>[?
07 13 02ED 365 BEQL 900$
; if EQL possible
4F 8F FF A1 91 02EF 366 CMPB -1(R1),#^A"O"
; and <ESC>O?
10 12 02F4 367 BNEQ 1020$
; if NEQ bad
60 61 91 02F6 368 900$: CMPB (R1), (R0)
; match ?
07 13 02F9 369 BEQL 920$
; if EQL found
50 02 C0 02FB 370 ADDL #2,R0
60 95 02FE 371 TSTB (R0)
F4 12 0300 372 BNEQ 900$
52 01 A0 9A 0302 373 920$: MOVZBL 1(R0), R2
; get the code.
0306 374 ;
68 02 AE B0 0306 375 1020$: MOVW 2(SP), (R8)
; return the length read.
08 12 030A 376 BNEQ 1050$
; if NEQ something there
01 52 91 030C 377 CMPB R2, #go_nowhere
; going anywhere ?
03 12 030F 378 BNEQ 1050$
; if NEQ yes
52 00 D0 0311 379 MOVL #go_empty, R2
51 00000022'GF DE 0314 380 1050$: MOVAL g^RETURNS, R1
50 6142 9A 031B 381 MOVZBL (R1)[R2], R0
; return the type
04 031F 382 RET
0320 383
50 FCFE CF 9E 0320 384 1900$: MOVAB FOURTERMS, R0
; { MAL272 vvv }
60 61 91 0325 385 1901$: CMPB (R1), (R0)
; first char match?
0E 12 0328 386 BNEQ 1910$
; didn't match
01 A0 01 A1 91 032A 387 CMPB 1(R1), 1(R0)
; second character match
07 12 032F 388 BNEQ 1910$
; didn't match
02 A0 02 A1 91 0331 389 CMPB 2(R1), 2(R0)
; third char match
09 13 0336 390 BEQL 1920$
; did match
50 04 C0 0338 391 1910$: ADDL #4, R0
; no match try next entry in the table
60 95 033B 392 TSTB (R0)
; end of table?
E6 12 033D 393 BNEQ 1901$
; not end, loop back
C5 13 033F 394 BEQL 1020$
; no match give up
52 03 A0 9A 0341 395 1920$: MOVZBL 3(R0), R2
; matches!! return code { MAL272 ^^^ }
BF 11 0345 396 BRB 1020$
; matched so return
0347 397 ;
0347 398 3000$: PASSTRING
<"Mu_prmptrd - the QIO failed. ">
0366 399 .END
MU_TRMIO
12-MAY-1997 16:43:05 VAX MACRO V5.4-3 Page 10
Symbol table
27-AUG-1993 17:16:41 [SOURCE.MENU]TERMIO.MAR;22 (5)
$$$ADR = 00000060 D IO$_READPROMPT
******** X 03
$$T1 = 00000001 D IO$_SENSEMODE
******** X 03
ASC_CR = 0000000D D IO$_SETMODE
******** X 03
ASC_EOF = 0000001A D LG_SS_ELOGIT
******** X 03
ASC_ESC = 0000001B D LIB$GET_INPUT
******** X 03
ASC_FF = 0000000C D LIB$PUT_OUTPUT
******** X 03
ASC_LF = 0000000A D MU_EXHAN
0000017E R D 03
ASC_TAB = 00000009 D MU_PRMPTRD
000001AF RG D 03
ASC_VT = 0000000B D MU_TINIT
00000031 RG D 03
BUARG = 00000008 D ONETERMS
00000008 R D 03
CHAN 0000001C R D 02 PFVARG
= 00000004 D
CLTARG = 00000010 D RETURNS
00000022 R D 02
DC$_TERM = 00000042 D SS$_TIMEOUT
******** X 03
DESBLK 00000000 R D 02 SYS$ASSIGN
******** GX 03
DEVNAM 00000028 R D 03 SYS$DASSGN
******** GX 03
DEVNAM_L = 00000009 D SYS$DCLEXH
******** GX 03
DT$_VT100 = 00000060 D SYS$GETDVI
******** GX 03
DT$_VT52 = 00000040 D SYS$QIOW
******** GX 03
DVI$_DEVCLASS = 00000004 D SYS$WAITFR
******** GX 03
ECHOARG = 00000014 D TERMBUF
00000000 R D 03
EST 00000010 R D 02 TERMCHR
00000014 R D 02
FCBOFF = 0000000C D TIMARG
= 0000000C D
FCBRECBEG = FFFFFFE8 D TT$V_ESCAPE
******** X 03
FCBRECCUR = FFFFFFEC D TWOTERMS
00000010 R D 03
FOURTERMS 00000022 R D 03 TYPE
0000001E R D 02
GO_AWAY = 00000006 D TYPE2
00000020 R D 02
GO_EAST = 00000004 D
GO_EMPTY = 00000000 D
GO_F10 = 00000010 D
GO_F11 = 00000011 D
GO_F12 = 00000012 D
GO_F13 = 00000013 D
GO_F14 = 00000014 D
GO_F15 = 00000015 D
GO_F16 = 00000016 D
GO_F17 = 00000017 D
GO_F18 = 00000018 D
GO_F19 = 00000019 D
GO_F20 = 0000001A D
GO_F6 = 0000000C D
GO_F7 = 0000000D D
GO_F8 = 0000000E D
GO_F9 = 0000000F D
GO_LENGTH = 0000000D D
GO_MAX = 0000000C D
GO_NORTH = 00000002 D
GO_NOWHERE = 00000001 D
GO_PF1 = 00000007 D
GO_PF2 = 00000008 D
GO_PF3 = 00000009 D
GO_PF4 = 0000000A D
GO_SOUTH = 00000003 D
GO_TIMED = 0000000B D
GO_WEST = 00000005 D
IO$V_NOECHO ******** X 03
IO$V_PURGE ******** X 03
IO$V_TIMED ******** X 03
MU_TRMIO
12-MAY-1997 16:43:05 VAX MACRO V5.4-3 Page 11
Psect synopsis
27-AUG-1993 17:16:41 [SOURCE.MENU]TERMIO.MAR;22 (5)
+----------------+
! Psect synopsis !
+----------------+
PSECT name Allocation PSECT No. Attributes
---------- ---------- --------- ----------
. ABS . 00000000 ( 0.) 00 ( 0.) NOPIC USR CON
ABS LCL NOSHR NOEXE NORD NOWRT NOVEC BYTE
$ABS$ 00000000 ( 0.) 01 ( 1.) NOPIC USR CON
ABS LCL NOSHR EXE RD WRT NOVEC BYTE
$LOCAL 0000002F ( 47.) 02 ( 2.) PIC USR CON
REL LCL NOSHR NOEXE RD WRT NOVEC LONG
$CODE 00000366 ( 870.) 03 ( 3.) PIC USR CON
REL LCL SHR EXE RD NOWRT NOVEC LONG
+------------------------+
! Performance indicators !
+------------------------+
Phase Page faults CPU Time Elapsed Time
----- ----------- -------- ------------
Initialization 37 00:00:00.02 00:00:00.10
Command processing 854 00:00:00.11 00:00:00.36
Pass 1 465 00:00:00.63 00:00:01.27
Symbol table sort 1 00:00:00.07 00:00:00.07
Pass 2 33 00:00:00.16 00:00:00.57
Symbol table output 1 00:00:00.00 00:00:00.00
Psect synopsis output 2 00:00:00.01 00:00:00.14
Cross-reference output 0 00:00:00.00 00:00:00.00
Assembler run totals 1399 00:00:01.00 00:00:02.52
The working set limit was 1950 pages.
48055 bytes (94 pages) of virtual memory were used to buffer the intermediate
code.
There were 50 pages of symbol table space allocated to hold 754 non-local and 28
local symbols.
399 source lines were read in Pass 1, producing 56 object records in Pass 2.
28 pages of virtual memory were used to define 25 macros.
+--------------------------+
! Macro library statistics !
+--------------------------+
Macro library name Macros defined
------------------ --------------
TOTE_MAL:[SHARED]TOTELIB.MLB;1 1
SYS$COMMON:[SYSLIB]STARLET.MLB;2 15
TOTALS (all libraries) 16
933 GETS were required to define 16 macros.
There were no errors, warnings or information messages.
MACRO/OBJ=TERMIO/LIST=TERMIO/DEBUG TERMIO+[SHARED]TOTELIB/LIB
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2673.1 | | TLE::REAGAN | All of this chaos makes perfect sense | Tue May 13 1997 14:50 | 20 |
| Gee, now I've seen everything.
As you can guess, doing this is unsupported and subject to change
at any time. Guess what? It has!
In OpenVMS Alpha V6.1 and V6.2, the "magic" numbers are -44/-40.
In OpenVMS Alpha V7.0, they are -48/-44 and with OpenVMS V7.1,
they are -56/-52.
In addition, I found a major bug in SDL between OpenVMS V6.2
and V7.0. The numbers should have also been -44/-40 in V7.0
and -52/-48 in V7.1. So when I go QAR it and it gets fixed,
the numbers will change again.
Alternatively, the way to do this is open OUTPUT explicitly
with CARRIAGE_CONTROL := NONE. That way, WRITELN does just
a buffer flush with no added cr,lf. If you want carriage
returns or line feeds, you have to write them out explicitly.
-John
|
| 2673.2 | | TLE::REAGAN | All of this chaos makes perfect sense | Wed May 14 1997 13:34 | 9 |
| I remember something last night. Besides getting new RTLs
with OpenVMS Alpha, the Pascal kit has also provided new RTLs
on occasion. There is a chance that an OpenVMS V6.1 system could
have a PAS$RTL.EXE that came with the compiler kit with the "magic"
numbers that aren't -44/-40. So if the customer thinks they can
decide the numbers based on the OpenVMS version, that won't work
either.
-John
|
| 2673.3 | | AUSS::GARSON | DECcharity Program Office | Wed May 14 1997 22:55 | 5 |
| re .2
I don't suppose there is an undocumented PAS$ routine that does the
flush. It would still be unsupported to call it but better than hard
coding offsets into data structures. ??
|
| 2673.4 | | TLE::REAGAN | All of this chaos makes perfect sense | Thu May 15 1997 13:31 | 8 |
| Nope. There is no undocumented routine to flush the buffer. The
documented routine to flush the buffer is WRITELN. If you don't
the implicit cr/lf that RMS adds, open the file with CARRIAGE_CONTROL
set to NONE. The Pascal RTL does not add the cr/lf. What RMS routine
could we call to flush the buffer without carriage control if the
file has it set?
-John
|