1: /* Copyright (c) 1979 Regents of the University of California */ 2: #include "ex.h" 3: #include "ex_argv.h" 4: #include "ex_temp.h" 5: #include "ex_tty.h" 6: 7: bool pflag, nflag; 8: int poffset; 9: 10: #define nochng() lchng = chng 11: 12: /* 13: * Main loop for command mode command decoding. 14: * A few commands are executed here, but main function 15: * is to strip command addresses, do a little address oriented 16: * processing and call command routines to do the real work. 17: */ 18: commands(noprompt, exitoneof) 19: bool noprompt, exitoneof; 20: { 21: register line *addr; 22: register int c; 23: register int lchng; 24: int given; 25: int seensemi; 26: int cnt; 27: bool hadpr; 28: 29: resetflav(); 30: nochng(); 31: for (;;) { 32: /* 33: * If dot at last command 34: * ended up at zero, advance to one if there is a such. 35: */ 36: if (dot <= zero) { 37: dot = zero; 38: if (dol > zero) 39: dot = one; 40: } 41: shudclob = 0; 42: 43: /* 44: * If autoprint or trailing print flags, 45: * print the line at the specified offset 46: * before the next command. 47: */ 48: if (pflag || 49: lchng != chng && value(AUTOPRINT) && !inglobal && !inopen && endline) { 50: pflag = 0; 51: nochng(); 52: if (dol != zero) { 53: addr1 = addr2 = dot + poffset; 54: if (addr1 < one || addr1 > dol) 55: error("Offset out-of-bounds|Offset after command too large"); 56: setdot1(); 57: goto print; 58: } 59: } 60: nochng(); 61: 62: /* 63: * Print prompt if appropriate. 64: * If not in global flush output first to prevent 65: * going into pfast mode unreasonably. 66: */ 67: if (inglobal == 0) { 68: flush(); 69: if (!hush && value(PROMPT) && !globp && !noprompt && endline) { 70: putchar(':'); 71: hadpr = 1; 72: } 73: TSYNC(); 74: } 75: 76: /* 77: * Gobble up the address. 78: * Degenerate addresses yield ".". 79: */ 80: addr2 = 0; 81: given = seensemi = 0; 82: do { 83: addr1 = addr2; 84: addr = address(0); 85: c = getcd(); 86: if (addr == 0) 87: if (c == ',') 88: addr = dot; 89: else if (addr1 != 0) { 90: addr2 = dot; 91: break; 92: } else 93: break; 94: addr2 = addr; 95: given++; 96: if (c == ';') { 97: c = ','; 98: dot = addr; 99: seensemi = 1; 100: } 101: } while (c == ','); 102: if (c == '%') { 103: /* %: same as 1,$ */ 104: addr1 = one; 105: addr2 = dol; 106: given = 2; 107: c = getchar(); 108: } 109: if (addr1 == 0) 110: addr1 = addr2; 111: if (c == ':') 112: c = getchar(); 113: 114: /* 115: * Set command name for special character commands. 116: */ 117: tailspec(c); 118: 119: /* 120: * If called via : escape from open or visual, limit 121: * the set of available commands here to save work below. 122: */ 123: if (inopen) { 124: if (c=='\n' || c=='\r' || c==CTRL(d) || c==EOF) { 125: if (addr2) 126: dot = addr2; 127: if (c == EOF) 128: return; 129: continue; 130: } 131: if (any(c, "o")) 132: notinvis: 133: tailprim(Command, 1, 1); 134: } 135: choice: 136: switch (c) { 137: 138: case 'a': 139: 140: if (peekchar() == 'r') { 141: /* args */ 142: tail("args"); 143: setnoaddr(); 144: eol(); 145: pargs(); 146: continue; 147: } 148: 149: /* append */ 150: if (inopen) 151: goto notinvis; 152: tail("append"); 153: setdot(); 154: aiflag = exclam(); 155: newline(); 156: deletenone(); 157: setin(addr2); 158: ignore(append(gettty, addr2)); 159: nochng(); 160: continue; 161: 162: case 'c': 163: switch (peekchar()) { 164: 165: /* copy */ 166: case 'o': 167: tail("copy"); 168: move(); 169: continue; 170: 171: #ifdef CHDIR 172: /* cd */ 173: case 'd': 174: tail("cd"); 175: goto changdir; 176: 177: /* chdir */ 178: case 'h': 179: ignchar(); 180: if (peekchar() == 'd') { 181: register char *p; 182: tail2of("chdir"); 183: changdir: 184: if (savedfile[0] == '/' || !value(WARN)) 185: ignore(exclam()); 186: else 187: ignore(quickly()); 188: if (skipend()) { 189: p = getenv("HOME"); 190: if (p == NULL) 191: error("Home directory unknown"); 192: } else 193: getone(), p = file; 194: eol(); 195: if (chdir(p) < 0) 196: filioerr(p); 197: if (savedfile[0] != '/') 198: edited = 0; 199: continue; 200: } 201: if (inopen) 202: tailprim("change", 2, 1); 203: tail2of("change"); 204: break; 205: 206: #endif 207: default: 208: if (inopen) 209: goto notinvis; 210: tail("change"); 211: break; 212: } 213: /* change */ 214: aiflag = exclam(); 215: setCNL(); 216: setin(addr1); 217: delete(0); 218: ignore(append(gettty, addr1 - 1)); 219: nochng(); 220: continue; 221: 222: /* delete */ 223: case 'd': 224: /* 225: * Caution: dp and dl have special meaning already. 226: */ 227: tail("delete"); 228: c = cmdreg(); 229: setCNL(); 230: if (c) 231: YANKreg(c); 232: delete(0); 233: appendnone(); 234: continue; 235: 236: /* edit */ 237: /* ex */ 238: case 'e': 239: tail(peekchar() == 'x' ? "ex" : "edit"); 240: editcmd: 241: if (!exclam() && chng) 242: c = 'E'; 243: filename(c); 244: if (c == 'E') { 245: ungetchar(lastchar()); 246: ignore(quickly()); 247: } 248: setnoaddr(); 249: doecmd: 250: init(); 251: addr2 = zero; 252: laste++; 253: sync(); 254: rop(c); 255: nochng(); 256: continue; 257: 258: /* file */ 259: case 'f': 260: tail("file"); 261: setnoaddr(); 262: filename(c); 263: noonl(); 264: synctmp(); 265: continue; 266: 267: /* global */ 268: case 'g': 269: tail("global"); 270: global(!exclam()); 271: nochng(); 272: continue; 273: 274: /* insert */ 275: case 'i': 276: if (inopen) 277: goto notinvis; 278: tail("insert"); 279: setdot(); 280: nonzero(); 281: aiflag = exclam(); 282: newline(); 283: deletenone(); 284: setin(addr2); 285: ignore(append(gettty, addr2 - 1)); 286: if (dot == zero && dol > zero) 287: dot = one; 288: nochng(); 289: continue; 290: 291: /* join */ 292: case 'j': 293: tail("join"); 294: c = exclam(); 295: setcount(); 296: nonzero(); 297: newline(); 298: if (given < 2 && addr2 != dol) 299: addr2++; 300: join(c); 301: continue; 302: 303: /* k */ 304: case 'k': 305: casek: 306: pastwh(); 307: c = getchar(); 308: if (endcmd(c)) 309: serror("Mark what?|%s requires following letter", Command); 310: newline(); 311: if (!islower(c)) 312: error("Bad mark|Mark must specify a letter"); 313: setdot(); 314: nonzero(); 315: names[c - 'a'] = *addr2 &~ 01; 316: anymarks = 1; 317: continue; 318: 319: /* list */ 320: case 'l': 321: tail("list"); 322: setCNL(); 323: ignorf(setlist(1)); 324: pflag = 0; 325: goto print; 326: 327: case 'm': 328: if (peekchar() == 'a') { 329: /* mark */ 330: tail("mark"); 331: goto casek; 332: } 333: /* move */ 334: tail("move"); 335: move(); 336: continue; 337: 338: case 'n': 339: if (peekchar() == 'u') { 340: tail("number"); 341: goto numberit; 342: } 343: /* next */ 344: tail("next"); 345: setnoaddr(); 346: ckaw(); 347: ignore(quickly()); 348: if (getargs()) 349: makargs(); 350: next(); 351: c = 'e'; 352: filename(c); 353: goto doecmd; 354: 355: /* open */ 356: case 'o': 357: tail("open"); 358: oop(); 359: pflag = 0; 360: nochng(); 361: continue; 362: 363: case 'p': 364: case 'P': 365: switch (peekchar()) { 366: 367: /* put */ 368: case 'u': 369: tail("put"); 370: setdot(); 371: c = cmdreg(); 372: eol(); 373: if (c) 374: putreg(c); 375: else 376: put(); 377: continue; 378: 379: case 'r': 380: ignchar(); 381: if (peekchar() == 'e') { 382: /* preserve */ 383: tail2of("preserve"); 384: eol(); 385: if (preserve() == 0) 386: error("Preserve failed!"); 387: else 388: error("File preserved."); 389: } 390: tail2of("print"); 391: break; 392: 393: default: 394: tail("print"); 395: break; 396: } 397: /* print */ 398: setCNL(); 399: pflag = 0; 400: print: 401: nonzero(); 402: if (CL && span() > LINES) { 403: flush1(); 404: vclear(); 405: } 406: plines(addr1, addr2, 1); 407: continue; 408: 409: /* quit */ 410: case 'q': 411: tail("quit"); 412: setnoaddr(); 413: c = quickly(); 414: eol(); 415: if (!c) 416: quit: 417: nomore(); 418: if (inopen) { 419: vgoto(WECHO, 0); 420: if (!ateopr()) 421: vnfl(); 422: else 423: putpad(VE); 424: flush(); 425: setty(normf); 426: } 427: cleanup(1); 428: exit(0); 429: 430: case 'r': 431: if (peekchar() == 'e') { 432: ignchar(); 433: switch (peekchar()) { 434: 435: /* rewind */ 436: case 'w': 437: tail2of("rewind"); 438: setnoaddr(); 439: eol(); 440: ckaw(); 441: ignore(quickly()); 442: erewind(); 443: next(); 444: c = 'e'; 445: ungetchar(lastchar()); 446: filename(c); 447: goto doecmd; 448: 449: /* recover */ 450: case 'c': 451: tail2of("recover"); 452: setnoaddr(); 453: c = 'e'; 454: if (!exclam() && chng) 455: c = 'E'; 456: filename(c); 457: if (c == 'E') { 458: ungetchar(lastchar()); 459: ignore(quickly()); 460: } 461: init(); 462: addr2 = zero; 463: laste++; 464: sync(); 465: recover(); 466: rop2(); 467: revocer(); 468: if (status == 0) 469: rop3(c); 470: if (dol != zero) 471: change(); 472: nochng(); 473: continue; 474: } 475: tail2of("read"); 476: } else 477: tail("read"); 478: /* read */ 479: if (savedfile[0] == 0 && dol == zero) 480: c = 'e'; 481: pastwh(); 482: if (peekchar() == '!') { 483: setdot(); 484: ignchar(); 485: unix0(0); 486: filter(0); 487: continue; 488: } 489: filename(c); 490: rop(c); 491: nochng(); 492: if (inopen && endline && addr1 > zero && addr1 < dol) 493: dot = addr1 + 1; 494: continue; 495: 496: case 's': 497: switch (peekchar()) { 498: 499: /* set */ 500: case 'e': 501: tail("set"); 502: setnoaddr(); 503: set(); 504: continue; 505: 506: /* shell */ 507: case 'h': 508: tail("shell"); 509: setNAEOL(); 510: vnfl(); 511: putpad(TE); 512: flush(); 513: unixwt(1, unixex("-i", (char *) 0, 0, 0)); 514: vcontin(0); 515: putpad(TI); 516: continue; 517: 518: /* source */ 519: case 'o': 520: if (inopen) 521: goto notinvis; 522: tail("source"); 523: setnoaddr(); 524: getone(); 525: eol(); 526: source(file, 0); 527: continue; 528: } 529: /* fall into ... */ 530: 531: /* & */ 532: /* ~ */ 533: /* substitute */ 534: case '&': 535: case '~': 536: Command = "substitute"; 537: if (c == 's') 538: tail(Command); 539: if (!substitute(c)) 540: pflag = 0; 541: continue; 542: 543: /* t */ 544: case 't': 545: #ifdef TAGSCODE 546: if (peekchar() == 'a') { 547: tail("tag"); 548: tagfind(exclam()); 549: if (!inopen) 550: lchng = chng - 1; 551: else 552: nochng(); 553: continue; 554: } 555: #endif 556: tail("t"); 557: move(); 558: continue; 559: 560: /* undo */ 561: case 'u': 562: tail("undo"); 563: setnoaddr(); 564: markDOT(); 565: c = exclam(); 566: newline(); 567: undo(c); 568: continue; 569: 570: case 'v': 571: switch (peekchar()) { 572: 573: case 'e': 574: /* version */ 575: tail("version"); 576: setNAEOL(); 577: printf("Version 2.13, 9/5/80"); 578: noonl(); 579: continue; 580: 581: /* visual */ 582: case 'i': 583: tail("visual"); 584: if (inopen) { 585: c = 'e'; 586: goto editcmd; 587: } 588: vop(); 589: pflag = 0; 590: nochng(); 591: continue; 592: } 593: /* v */ 594: tail("v"); 595: global(0); 596: nochng(); 597: continue; 598: 599: /* write */ 600: case 'w': 601: c = peekchar(); 602: tail(c == 'q' ? "wq" : "write"); 603: wq: 604: if (skipwh() && peekchar() == '!') { 605: ignchar(); 606: setall(); 607: unix0(0); 608: filter(1); 609: } else { 610: setall(); 611: wop(1); 612: nochng(); 613: } 614: if (c == 'q') 615: goto quit; 616: continue; 617: 618: /* xit */ 619: case 'x': 620: tail("xit"); 621: if (!chng) 622: goto quit; 623: c = 'q'; 624: goto wq; 625: 626: /* yank */ 627: case 'y': 628: tail("yank"); 629: c = cmdreg(); 630: setcount(); 631: eol(); 632: if (c) 633: YANKreg(c); 634: else 635: yank(); 636: continue; 637: 638: /* z */ 639: case 'z': 640: zop(0); 641: pflag = 0; 642: continue; 643: 644: /* | */ 645: case '|': 646: endline = 0; 647: goto caseline; 648: 649: /* \n */ 650: case '\n': 651: endline = 1; 652: caseline: 653: notempty(); 654: if (addr2 == 0) { 655: if (UP != NOSTR && c == '\n' && !inglobal) 656: c = CTRL(k); 657: if (inglobal) 658: addr1 = addr2 = dot; 659: else { 660: if (dot == dol) 661: error("At EOF|At end-of-file"); 662: addr1 = addr2 = dot + 1; 663: } 664: } 665: setdot(); 666: nonzero(); 667: if (seensemi) 668: addr1 = addr2; 669: getline(*addr1); 670: if (c == CTRL(k)) { 671: flush1(); 672: destline--; 673: if (hadpr) 674: shudclob = 1; 675: } 676: plines(addr1, addr2, 1); 677: continue; 678: 679: /* " */ 680: case '"': 681: comment(); 682: continue; 683: 684: /* # */ 685: case '#': 686: numberit: 687: setCNL(); 688: ignorf(setnumb(1)); 689: pflag = 0; 690: goto print; 691: 692: /* = */ 693: case '=': 694: newline(); 695: setall(); 696: printf("%d", lineno(addr2)); 697: noonl(); 698: continue; 699: 700: /* ! */ 701: case '!': 702: if (addr2 != 0) { 703: unix0(0); 704: setdot(); 705: filter(2); 706: } else { 707: unix0(1); 708: vnfl(); 709: putpad(TE); 710: flush(); 711: unixwt(1, unixex("-c", uxb, 0, 0)); 712: vcontin(1); 713: putpad(TI); 714: nochng(); 715: } 716: continue; 717: 718: /* < */ 719: /* > */ 720: case '<': 721: case '>': 722: for (cnt = 1; peekchar() == c; cnt++) 723: ignchar(); 724: setCNL(); 725: shift(c, cnt); 726: continue; 727: 728: /* ^D */ 729: /* EOF */ 730: case CTRL(d): 731: case EOF: 732: if (exitoneof) { 733: if (addr2 != 0) 734: dot = addr2; 735: return; 736: } 737: if (!isatty(0)) { 738: if (intty) 739: /* 740: * Chtty sys call at UCB may cause a 741: * input which was a tty to suddenly be 742: * turned into /dev/null. 743: */ 744: onhup(); 745: return; 746: } 747: if (addr2 != 0) { 748: setlastchar('\n'); 749: putnl(); 750: } 751: if (dol == zero) { 752: if (addr2 == 0) 753: putnl(); 754: notempty(); 755: } 756: ungetchar(EOF); 757: zop(hadpr); 758: continue; 759: 760: default: 761: if (!isalpha(c)) 762: break; 763: ungetchar(c); 764: tailprim("", 0, 0); 765: } 766: error("What?|Unknown command character '%c'", c); 767: } 768: }
Defined functions
commands
defined in line 18; used 10 times
- in /usr/src/ucb/ex/ex2/ex.c line 261, 282, 301, 315
- in /usr/src/ucb/ex/ex2/ex_cmdsub.c line 540, 551
- in /usr/src/ucb/ex/ex2/ex_io.c line 379, 684
- in /usr/src/ucb/ex/ex2/ex_re.c line 91
- in /usr/src/ucb/ex/ex2/ex_vmain.c line 757
Defined variables
Defined macros
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Last modified: 1980-09-13
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