| 1 | /* |
| 2 | * Copyright (c) 1984, 1985, 1986 by the Regents of the |
| 3 | * University of California and by Gregory Glenn Minshall. |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute these |
| 6 | * programs and their documentation for any purpose and |
| 7 | * without fee is hereby granted, provided that this |
| 8 | * copyright and permission appear on all copies and |
| 9 | * supporting documentation, the name of the Regents of |
| 10 | * the University of California not be used in advertising |
| 11 | * or publicity pertaining to distribution of the programs |
| 12 | * without specific prior permission, and notice be given in |
| 13 | * supporting documentation that copying and distribution is |
| 14 | * by permission of the Regents of the University of California |
| 15 | * and by Gregory Glenn Minshall. Neither the Regents of the |
| 16 | * University of California nor Gregory Glenn Minshall make |
| 17 | * representations about the suitability of this software |
| 18 | * for any purpose. It is provided "as is" without |
| 19 | * express or implied warranty. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static char sccsid[] = "@(#)outbound.c 3.1 10/29/86"; |
| 24 | #endif /* lint */ |
| 25 | |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <dos.h> |
| 29 | #include "../general/general.h" |
| 30 | |
| 31 | #include "../telnet.ext" |
| 32 | |
| 33 | #include "../api/disp_asc.h" |
| 34 | #include "../ascii/map3270.ext" |
| 35 | |
| 36 | #include "../ctlr/hostctlr.h" |
| 37 | #include "../ctlr/inbound.ext" |
| 38 | #include "../ctlr/oia.h" |
| 39 | #include "../ctlr/options.ext" |
| 40 | #include "../ctlr/outbound.ext" |
| 41 | #include "../ctlr/screen.h" |
| 42 | |
| 43 | #include "../general/globals.h" |
| 44 | |
| 45 | #include "video.h" |
| 46 | |
| 47 | extern void EmptyTerminal(); |
| 48 | |
| 49 | #define CorrectTerminalCursor() ((TransparentClock == OutputClock)? \ |
| 50 | terminalCursorAddress:UnLocked? CursorAddress: HighestScreen()) |
| 51 | |
| 52 | |
| 53 | static int terminalCursorAddress; /* where the cursor is on term */ |
| 54 | static int screenInitd; /* the screen has been initialized */ |
| 55 | static int screenStopped; /* the screen has been stopped */ |
| 56 | |
| 57 | static int needToRing; /* need to ring terinal bell */ |
| 58 | |
| 59 | typedef struct { |
| 60 | char |
| 61 | data, /* The data for this position */ |
| 62 | attr; /* The attributes for this position */ |
| 63 | } ScreenBuffer; |
| 64 | |
| 65 | ScreenBuffer Screen[MAXNUMBERLINES*MAXNUMBERCOLUMNS]; |
| 66 | ScreenBuffer saveScreen[sizeof Screen/sizeof Screen[0]]; |
| 67 | \f |
| 68 | /* OurExitString - designed to keep us from going through infinite recursion */ |
| 69 | |
| 70 | static void |
| 71 | OurExitString(file, string, value) |
| 72 | FILE *file; |
| 73 | char *string; |
| 74 | int value; |
| 75 | { |
| 76 | static int recursion = 0; |
| 77 | |
| 78 | if (!recursion) { |
| 79 | recursion = 1; |
| 80 | ExitString(file, string, value); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | |
| 85 | static void |
| 86 | GoAway(from, where) |
| 87 | char *from; /* routine that gave error */ |
| 88 | int where; /* cursor address */ |
| 89 | { |
| 90 | char foo[100]; |
| 91 | |
| 92 | sprintf(foo, "ERR from %s at %d (%d, %d)\n", |
| 93 | from, where, ScreenLine(where), ScreenLineOffset(where)); |
| 94 | OurExitString(stderr, foo, 1); |
| 95 | /* NOTREACHED */ |
| 96 | } |
| 97 | \f |
| 98 | /* |
| 99 | * Routines to deal with the screen. These routines are lifted |
| 100 | * from mskermit. |
| 101 | */ |
| 102 | |
| 103 | #define CRT_STATUS 0x3da /* Color card */ |
| 104 | #define DISPLAY_ENABLE 0x08 /* Enable */ |
| 105 | #define scrseg() ((crt_mode == 7)? 0xb000 : 0xb800) |
| 106 | #define scrwait() if (crt_mode != 7) { \ |
| 107 | while ((inp(CRT_STATUS)&DISPLAY_ENABLE) == 0) { \ |
| 108 | ; \ |
| 109 | } \ |
| 110 | } |
| 111 | static int |
| 112 | crt_mode, |
| 113 | crt_cols, |
| 114 | crt_lins, |
| 115 | curpage; |
| 116 | |
| 117 | /* |
| 118 | * Set the cursor position to where it belongs. |
| 119 | */ |
| 120 | |
| 121 | static void |
| 122 | setcursor(row, column, page) |
| 123 | int |
| 124 | row, |
| 125 | column, |
| 126 | page; |
| 127 | { |
| 128 | union REGS inregs, outregs; |
| 129 | |
| 130 | inregs.h.dh = row; |
| 131 | inregs.h.dl = column; |
| 132 | inregs.h.bh = page; |
| 133 | inregs.h.ah = SetCursorPosition; |
| 134 | |
| 135 | int86(BIOS_VIDEO, &inregs, &outregs); |
| 136 | } |
| 137 | /* |
| 138 | * Read the state of the video system. Put the cursor somewhere |
| 139 | * reasonable. |
| 140 | */ |
| 141 | |
| 142 | static void |
| 143 | scrini() |
| 144 | { |
| 145 | union REGS inregs, outregs; |
| 146 | |
| 147 | inregs.h.ah = CurrentVideoState; |
| 148 | int86(BIOS_VIDEO, &inregs, &outregs); |
| 149 | |
| 150 | crt_mode = outregs.h.al; |
| 151 | crt_cols = outregs.h.ah; |
| 152 | crt_lins = 25; |
| 153 | curpage = outregs.h.bh; |
| 154 | |
| 155 | inregs.h.ah = ReadCursorPosition; |
| 156 | inregs.h.bh = curpage; |
| 157 | |
| 158 | int86(BIOS_VIDEO, &inregs, &outregs); |
| 159 | |
| 160 | if (outregs.h.dh > crt_lins) { |
| 161 | outregs.h.dh = crt_lins; |
| 162 | } |
| 163 | if (outregs.h.dl > crt_cols) { |
| 164 | outregs.h.dl = crt_cols; |
| 165 | } |
| 166 | inregs.h.dh = outregs.h.dh; |
| 167 | inregs.h.dl = outregs.h.dl; |
| 168 | inregs.h.bh = curpage; |
| 169 | |
| 170 | inregs.h.ah = SetCursorPosition; |
| 171 | int86(BIOS_VIDEO, &inregs, &outregs); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | static void |
| 176 | scrwrite(source, length, offset) |
| 177 | ScreenBuffer *source; |
| 178 | int |
| 179 | length, |
| 180 | offset; |
| 181 | { |
| 182 | struct SREGS segregs; |
| 183 | |
| 184 | segread(&segregs); /* read the current segment register */ |
| 185 | |
| 186 | scrwait(); |
| 187 | movedata(segregs.ds, source, scrseg(), sizeof *source*offset, |
| 188 | sizeof *source*length); |
| 189 | } |
| 190 | |
| 191 | static void |
| 192 | scrsave(buffer) |
| 193 | ScreenBuffer *buffer; |
| 194 | { |
| 195 | struct SREGS segregs; |
| 196 | |
| 197 | segread(&segregs); /* read the current segment register */ |
| 198 | |
| 199 | scrwait(); |
| 200 | movedata(scrseg(), 0, segregs.ds, buffer, crt_cols*crt_lins*2); |
| 201 | } |
| 202 | |
| 203 | static void |
| 204 | scrrest(buffer) |
| 205 | ScreenBuffer *buffer; |
| 206 | { |
| 207 | scrwrite(buffer, crt_cols*crt_lins, 0); |
| 208 | } |
| 209 | \f |
| 210 | static void |
| 211 | TryToSend() |
| 212 | { |
| 213 | #define STANDOUT 0x0a /* Highlighted mode */ |
| 214 | #define NORMAL 0x02 /* Normal mode */ |
| 215 | #define NONDISPLAY 0x00 /* Don't display */ |
| 216 | |
| 217 | #define DoAttribute(a) \ |
| 218 | if (screenIsFormatted) { \ |
| 219 | if (IsNonDisplayAttr(a)) { \ |
| 220 | a = NONDISPLAY; /* don't display */ \ |
| 221 | } else if (IsHighlightedAttr(a)) { \ |
| 222 | a = STANDOUT; \ |
| 223 | } else { \ |
| 224 | a = NORMAL; \ |
| 225 | } \ |
| 226 | } else { \ |
| 227 | a = NORMAL; /* do display on unformatted */\ |
| 228 | } |
| 229 | ScreenImage *p, *upper; |
| 230 | ScreenBuffer *sp; |
| 231 | int fieldattr; /* spends most of its time == 0 or 1 */ |
| 232 | int screenIsFormatted = FormattedScreen(); |
| 233 | |
| 234 | /* OK. We want to do this a quickly as possible. So, we assume we |
| 235 | * only need to go from Lowest to Highest. However, if we find a |
| 236 | * field in the middle, we do the whole screen. |
| 237 | * |
| 238 | * In particular, we separate out the two cases from the beginning. |
| 239 | */ |
| 240 | if ((Highest != HighestScreen()) || (Lowest != LowestScreen())) { |
| 241 | sp = &Screen[Lowest]; |
| 242 | p = &Host[Lowest]; |
| 243 | upper = &Host[Highest]; |
| 244 | fieldattr = FieldAttributes(Lowest); |
| 245 | DoAttribute(fieldattr); /* Set standout, non-display status */ |
| 246 | |
| 247 | while (p <= upper) { |
| 248 | if (IsStartFieldPointer(p)) { /* New field? */ |
| 249 | Highest = HighestScreen(); |
| 250 | Lowest = LowestScreen(); |
| 251 | TryToSend(); /* Recurse */ |
| 252 | return; |
| 253 | } else if (fieldattr) { /* Should we display? */ |
| 254 | /* Display translated data */ |
| 255 | sp->data = disp_asc[GetHostPointer(p)]; |
| 256 | } else { |
| 257 | sp->data = ' '; |
| 258 | } |
| 259 | sp->attr = fieldattr; |
| 260 | p++; |
| 261 | sp++; |
| 262 | } |
| 263 | } else { /* Going from Lowest to Highest */ |
| 264 | ScreenImage *End = &Host[ScreenSize]-1; |
| 265 | |
| 266 | sp = Screen; |
| 267 | p = Host; |
| 268 | fieldattr = FieldAttributes(LowestScreen()); |
| 269 | DoAttribute(fieldattr); /* Set standout, non-display status */ |
| 270 | |
| 271 | while (p <= End) { |
| 272 | if (IsStartFieldPointer(p)) { /* New field? */ |
| 273 | fieldattr = FieldAttributesPointer(p); /* Get attributes */ |
| 274 | DoAttribute(fieldattr); /* Set standout, non-display */ |
| 275 | } |
| 276 | if (fieldattr) { /* Should we display? */ |
| 277 | /* Display translated data */ |
| 278 | sp->data = disp_asc[GetHostPointer(p)]; |
| 279 | } else { |
| 280 | sp->data = ' '; |
| 281 | } |
| 282 | sp->attr = fieldattr; |
| 283 | p++; |
| 284 | sp++; |
| 285 | } |
| 286 | } |
| 287 | terminalCursorAddress = CorrectTerminalCursor(); |
| 288 | /* |
| 289 | * We might be here just to update the cursor address. |
| 290 | */ |
| 291 | if (Highest >= Lowest) { |
| 292 | scrwrite(Screen+Lowest, (1+Highest-Lowest), Lowest); |
| 293 | } |
| 294 | setcursor(ScreenLine(terminalCursorAddress), |
| 295 | ScreenLineOffset(terminalCursorAddress), 0); |
| 296 | Lowest = HighestScreen()+1; |
| 297 | Highest = LowestScreen()-1; |
| 298 | if (needToRing) { |
| 299 | DataToTerminal("\7", 1); |
| 300 | needToRing = 0; |
| 301 | } |
| 302 | return; |
| 303 | } |
| 304 | \f |
| 305 | /* InitTerminal - called to initialize the screen, etc. */ |
| 306 | |
| 307 | void |
| 308 | InitTerminal() |
| 309 | { |
| 310 | InitMapping(); /* Go do mapping file (MAP3270) first */ |
| 311 | if (!screenInitd) { /* not initialized */ |
| 312 | MaxNumberLines = 24; /* XXX */ |
| 313 | MaxNumberColumns = 80; /* XXX */ |
| 314 | scrini(); |
| 315 | scrsave(saveScreen); /* Save the screen buffer away */ |
| 316 | ClearArray(Screen); |
| 317 | terminalCursorAddress = SetBufferAddress(0,0); |
| 318 | screenInitd = 1; |
| 319 | screenStopped = 0; /* Not stopped */ |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | |
| 324 | /* StopScreen - called when we are going away... */ |
| 325 | |
| 326 | void |
| 327 | StopScreen(doNewLine) |
| 328 | int doNewLine; |
| 329 | { |
| 330 | if (screenInitd && !screenStopped) { |
| 331 | scrrest(saveScreen); |
| 332 | setcursor(NumberLines-1, 1, 0); |
| 333 | if (doNewLine) { |
| 334 | StringToTerminal("\r\n"); |
| 335 | } |
| 336 | EmptyTerminal(); |
| 337 | screenStopped = 1; |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | |
| 342 | /* RefreshScreen - called to cause the screen to be refreshed */ |
| 343 | |
| 344 | void |
| 345 | RefreshScreen() |
| 346 | { |
| 347 | Highest = HighestScreen(); |
| 348 | Lowest = LowestScreen(); |
| 349 | TryToSend(); |
| 350 | } |
| 351 | |
| 352 | |
| 353 | /* ConnectScreen - called to reconnect to the screen */ |
| 354 | |
| 355 | void |
| 356 | ConnectScreen() |
| 357 | { |
| 358 | if (screenInitd) { |
| 359 | RefreshScreen(); |
| 360 | screenStopped = 0; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /* LocalClearScreen() - clear the whole ball of wax, cheaply */ |
| 365 | |
| 366 | void |
| 367 | LocalClearScreen() |
| 368 | { |
| 369 | Clear3270(); |
| 370 | Lowest = LowestScreen(); /* everything in sync... */ |
| 371 | Highest = HighestScreen(); |
| 372 | TryToSend(); |
| 373 | } |
| 374 | \f |
| 375 | /* |
| 376 | * Implement the bell/error message function. |
| 377 | */ |
| 378 | |
| 379 | int |
| 380 | bellwinup = 0; /* If != 0, length of bell message */ |
| 381 | static int |
| 382 | bell_len = 0; /* Length of error message */ |
| 383 | |
| 384 | |
| 385 | void |
| 386 | BellOff() |
| 387 | { |
| 388 | ScreenBuffer a[100]; |
| 389 | int i; |
| 390 | |
| 391 | if (bellwinup) { |
| 392 | unsigned char blank = ' '; |
| 393 | |
| 394 | for (i = 0; i < bell_len; i++) { |
| 395 | a[i].attr = NORMAL; |
| 396 | a[i].data = ' '; |
| 397 | } |
| 398 | } |
| 399 | scrwrite(a, bell_len, 24*80); /* XXX */ |
| 400 | } |
| 401 | |
| 402 | |
| 403 | void |
| 404 | RingBell(s) |
| 405 | char *s; |
| 406 | { |
| 407 | needToRing = 1; |
| 408 | if (s) { |
| 409 | int i; |
| 410 | ScreenBuffer bellstring[100]; |
| 411 | |
| 412 | bell_len = strlen(s); |
| 413 | bellwinup = 1; |
| 414 | if (bell_len > sizeof bellstring-1) { |
| 415 | OurExitString(stderr, "Bell string too long.", 1); |
| 416 | } |
| 417 | for (i = 0; i < bell_len; i++) { |
| 418 | bellstring[i].attr = STANDOUT; |
| 419 | bellstring[i].data = s[i]; |
| 420 | } |
| 421 | scrwrite(bellstring, bell_len, 24*80); /* XXX */ |
| 422 | } |
| 423 | } |
| 424 | \f |
| 425 | /* |
| 426 | * Update the OIA area. |
| 427 | */ |
| 428 | |
| 429 | void |
| 430 | ScreenOIA(oia) |
| 431 | OIA *oia; |
| 432 | { |
| 433 | } |
| 434 | \f |
| 435 | |
| 436 | /* returns a 1 if no more output available (so, go ahead and block), |
| 437 | or a 0 if there is more output available (so, just poll the other |
| 438 | sources/destinations, don't block). |
| 439 | */ |
| 440 | |
| 441 | int |
| 442 | DoTerminalOutput() |
| 443 | { |
| 444 | /* called just before a select to conserve IO to terminal */ |
| 445 | if (!(screenInitd||screenStopped)) { |
| 446 | return 1; /* No output if not initialized */ |
| 447 | } |
| 448 | if ((Lowest <= Highest) || needToRing || |
| 449 | (terminalCursorAddress != CorrectTerminalCursor())) { |
| 450 | TryToSend(); |
| 451 | } |
| 452 | if (Lowest > Highest) { |
| 453 | return 1; /* no more output now */ |
| 454 | } else { |
| 455 | return 0; /* more output for future */ |
| 456 | } |
| 457 | } |
| 458 | \f |
| 459 | /* |
| 460 | * The following are defined to handle transparent data. |
| 461 | */ |
| 462 | |
| 463 | void |
| 464 | TransStop() |
| 465 | { |
| 466 | RefreshScreen(); |
| 467 | } |
| 468 | |
| 469 | void |
| 470 | TransOut(buffer, count) |
| 471 | unsigned char *buffer; |
| 472 | int count; |
| 473 | { |
| 474 | |
| 475 | while (DoTerminalOutput() == 0) { |
| 476 | ; |
| 477 | } |
| 478 | (void) DataToTerminal(buffer, count); |
| 479 | } |
| 480 | \f |
| 481 | /* |
| 482 | * init_screen() |
| 483 | * |
| 484 | * Initialize variables used by screen. |
| 485 | */ |
| 486 | |
| 487 | void |
| 488 | init_screen() |
| 489 | { |
| 490 | bellwinup = 0; |
| 491 | } |
| 492 | |
| 493 | |