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1.1 ! root 1: /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */ ! 2: /* $Header: b2cmd.c,v 1.1 84/06/28 00:49:04 timo Exp $ */ ! 3: ! 4: /* B commands */ ! 5: #include "b.h" ! 6: #include "b0con.h" ! 7: #include "b1obj.h" ! 8: #include "b2env.h" ! 9: #include "b2scr.h" ! 10: #include "b2err.h" ! 11: #include "b2key.h" ! 12: #include "b2syn.h" ! 13: #include "b2sem.h" ! 14: #include "b2typ.h" ! 15: ! 16: #define Nex if (!xeq) {tx= ceol; return Yes;} ! 17: ! 18: char rdbuf[RDBUFSIZE]; ! 19: txptr rdbufend= &rdbuf[RDBUFSIZE]; ! 20: ! 21: #define USE_QUIT "\r*** use QUIT or interrupt to abort READ command\n" ! 22: ! 23: Hidden Procedure read_line(l, t, eg) loc l; btype t; bool eg; { ! 24: context c; txptr tx0= tx, rp; intlet k; value r; btype rt; ! 25: envtab svprmnvtab= Vnil; bool must_sv= eg, got; ! 26: sv_context(&c); ! 27: if (active_reads >= MAX_NMB_ACT_READS) ! 28: error("too many READs simultaneously active"); ! 29: if (setjmp(reading[active_reads++]) != 0) /* long jump occurred */ ! 30: set_context(&c); ! 31: if (cntxt != In_read) sv_context(&read_context); ! 32: if (must_sv) svprmnvtab= prmnvtab == Vnil ? Vnil : prmnv->tab; ! 33: /* save scratch-pad copy because of following setprmnv() */ ! 34: if (eg) setprmnv(); must_sv= No; ! 35: cntxt= In_read; ! 36: got= No; ! 37: while (!got) { ! 38: tx= rp= rdbuf; ! 39: if (read_interactive) { ! 40: fprintf(stderr, eg ? eg_prompt : raw_prompt); ! 41: } ! 42: got= Yes; ! 43: while ((k= getchar()) != EOF && k != '\n') { ! 44: *rp++= k; ! 45: if (rp > rdbufend-1) syserr("read buffer overflow"); ! 46: } ! 47: if (k == EOF) { ! 48: if (read_interactive) { ! 49: fprintf(stderr, USE_QUIT); ! 50: CLEAR_EOF; ! 51: if (outeractive) at_nwl= Yes; ! 52: got= No; ! 53: } else error("End of file encountered during READ command"); ! 54: } ! 55: } ! 56: if (read_interactive && outeractive && k == '\n') at_nwl= Yes; ! 57: *rp= '\n'; ! 58: Skipsp(tx); ! 59: if (atkw(QUIT)) int_signal(Yes); ! 60: if (eg) { ! 61: r= expr(rp); rt= valtype(r); ! 62: if (svprmnvtab != Vnil) { ! 63: prmnvtab= prmnv->tab; ! 64: prmnv->tab= svprmnvtab; ! 65: } ! 66: must_sv= Yes; ! 67: set_context(&c); ! 68: must_agree(t, rt, ! 69: "type of expression does not agree with that of EG sample"); ! 70: release(rt); ! 71: } else { ! 72: *rp= '\0'; ! 73: r= mk_text(rdbuf); ! 74: set_context(&c); ! 75: } ! 76: put(r, l); ! 77: active_reads--; ! 78: release(r); ! 79: tx= tx0; ! 80: } ! 81: ! 82: Hidden Procedure check(o) outcome o; { ! 83: if (o == Fail) checkerr(); ! 84: } ! 85: ! 86: Hidden bool sim_com() { ! 87: txptr ftx, ttx; ! 88: switch (Char(tx)) { ! 89: case 'C': if (atkw(CHECK)) { ! 90: env e0= curnv; outcome o; ! 91: Nex; ! 92: o= test(ceol); ! 93: if (xeq) { ! 94: check(o); ! 95: restore_env(e0); ! 96: } ! 97: return Yes; ! 98: } else if (atkw(CHOOSE)) { ! 99: loc l; value v; ! 100: reqkw(FROM_choose, &ftx, &ttx); ! 101: Nex; ! 102: l= targ(ftx); ! 103: tx= ttx; v= expr(ceol); ! 104: if (xeq) choose(l, v); ! 105: release(v); release(l); ! 106: return Yes; ! 107: } ! 108: return No; ! 109: case 'D': if (atkw(DELETE)) { ! 110: loc l; ! 111: Nex; ! 112: l= targ(ceol); ! 113: if (xeq) l_delete(l); ! 114: release(l); ! 115: return Yes; ! 116: } else if (atkw(DRAW)) { ! 117: loc l; ! 118: Nex; ! 119: l= targ(ceol); ! 120: if (xeq) draw(l); ! 121: release(l); ! 122: return Yes; ! 123: } ! 124: return No; ! 125: case 'E': if (atkw(ELSE)) { ! 126: pprerr("ELSE only allowed as alternative test after SELECT", ""); ! 127: } ! 128: return No; ! 129: case 'I': if (atkw(INSERT)) { ! 130: value v; loc l; ! 131: reqkw(IN_insert, &ftx, &ttx); ! 132: Nex; ! 133: v= expr(ftx); ! 134: tx= ttx; l= targ(ceol); ! 135: if (xeq) l_insert(v, l); ! 136: release(v); release(l); ! 137: return Yes; ! 138: } ! 139: return No; ! 140: case 'P': if (atkw(PUT)) { ! 141: value v; loc l; ! 142: reqkw(IN_put, &ftx, &ttx); ! 143: Nex; ! 144: v= expr(ftx); ! 145: tx= ttx; l= targ(ceol); ! 146: if (xeq) put(v, l); ! 147: release(v); release(l); ! 148: return Yes; ! 149: } ! 150: return No; ! 151: case 'R': if (atkw(READ)) { ! 152: value v; loc l; btype vt, lt; bool eg= Yes; ! 153: if (find(RAW, ceol, &ftx, &ttx)) { ! 154: eg= No; ! 155: vt= mk_text(""); ! 156: } else reqkw(EG, &ftx, &ttx); ! 157: Nex; ! 158: l= targ(ftx); lt= loctype(l); ! 159: tx= ttx; ! 160: if (eg) { ! 161: v= expr(ceol); ! 162: vt= valtype(v); release(v); ! 163: } ! 164: must_agree(vt, lt, ! 165: eg ? "this sample could not lawfully be put in the target" ! 166: : "in READ x RAW, x must be a simple textual target"); ! 167: release(lt); ! 168: if (xeq) read_line(l, vt, eg); ! 169: release(l); release(vt); ! 170: return Yes; ! 171: } else if (atkw(REMOVE)) { ! 172: value v; loc l; ! 173: reqkw(FROM_remove, &ftx, &ttx); ! 174: Nex; ! 175: v= expr(ftx); ! 176: tx= ttx; l= targ(ceol); ! 177: if (xeq) l_remove(v, l); ! 178: release(v); release(l); ! 179: return Yes; ! 180: } ! 181: return No; ! 182: case 'S': if (atkw(SET_RANDOM)) { ! 183: value v; ! 184: Nex; ! 185: v= expr(ceol); ! 186: if (xeq) set_random(v); ! 187: release(v); ! 188: return Yes; ! 189: } else if (atkw(SHARE)) pprerr( ! 190: "SHARE only allowed following HOW'TO-, YIELD- or TEST-heading", ""); ! 191: return No; ! 192: case 'W': if (atkw(WRITE)) { ! 193: txptr tx0; value v; intlet nwlc; ! 194: Nex; ! 195: Skipsp(tx); ! 196: while (Char(tx) == '/' && (Char(tx+1) == '/')) { ! 197: if (xeq) newline(); ! 198: tx++; ! 199: } ! 200: tx0= tx; ! 201: loop: if (Char(tx++) != '/') {tx= tx0; goto postnl;} ! 202: if (Char(tx++) == '*') goto loop; ! 203: if (xeq) newline(); ! 204: tx= tx0+1; ! 205: postnl: ftx= ceol; ! 206: while (Space(Char(ftx-1))) ftx--; ! 207: nwlc= 0; ! 208: while (ftx > tx && Char(ftx-1) == '/') { ! 209: nwlc++; ! 210: ftx--; ! 211: } ! 212: if (ftx > tx) { ! 213: v= expr(ftx); ! 214: if (xeq) writ(v); ! 215: release(v); ! 216: } ! 217: while (nwlc-- > 0) { ! 218: if (xeq) newline(); ! 219: } ! 220: return Yes; ! 221: } ! 222: return No; ! 223: default: return No; ! 224: } ! 225: } ! 226: ! 227: #define Reqcol {req(":", ceol, &utx, &vtx); \ ! 228: if (!xeq) {tx= vtx; comm_suite(); return Yes;}} ! 229: #define Resetx(tx0) {tx= (tx0); lino= lino0; cur_ilev= cil;} ! 230: ! 231: Hidden bool con_com() { ! 232: intlet lino0= lino, cil= cur_ilev; ! 233: txptr ftx, ttx, utx, vtx; ! 234: switch (Char(tx)) { ! 235: case 'I': if (atkw(IF)) { ! 236: env e0= curnv; bool xeq0= xeq; ! 237: outcome o; ! 238: Reqcol; ! 239: o= test(utx); ! 240: xeq= o == Succ; ! 241: tx= vtx; comm_suite(); ! 242: xeq= xeq0; restore_env(e0); ! 243: return Yes; ! 244: } ! 245: return No; ! 246: case 'S': if (atkw(SELECT)) { ! 247: need(":"); ! 248: upto(ceol, "SELECT:"); ! 249: alt_suite(); ! 250: return Yes; ! 251: } ! 252: return No; ! 253: case 'W': if (atkw(WHILE)) { ! 254: env e0= curnv; bool xeq0= xeq; txptr tx0= tx; ! 255: outcome o; ! 256: Reqcol; ! 257: loop: o= test(utx); ! 258: if (xeq0) xeq= o == Succ; ! 259: tx= vtx; comm_suite(); ! 260: xeq= xeq0; restore_env(e0); ! 261: if (xeq && o == Succ && !terminated) { ! 262: Resetx(tx0); goto loop; ! 263: } ! 264: return Yes; ! 265: } ! 266: return No; ! 267: case 'F': if (atkw(FOR)) { ! 268: env e0= curnv; bool xeq0= xeq; loc l; value v, w; ! 269: Reqcol; ! 270: if (find(PARSING, utx, &ftx, &ttx)) { ! 271: tx= ttx; pprerr("PARSING not allowed in FOR ...", ""); ! 272: } ! 273: reqkw(IN_for, &ftx, &ttx); ! 274: if (ttx > ceol) { ! 275: tx= ceol; ! 276: parerr("IN after colon", ""); ! 277: } ! 278: l= targ(ftx); ! 279: if (!Is_simploc(l) && !Is_compound(l)) /*to bloc.c?*/ ! 280: pprerr("inappropriate identifier after FOR", ""); ! 281: bind(l); ! 282: tx= ttx; v= expr(utx); ! 283: {value k, k1, len= xeq ? size(v) : copy(one); ! 284: if (compare(len, zero) == 0) { ! 285: xeq= No; release(len); len= copy(one); ! 286: } ! 287: k= copy(one); ! 288: while (!terminated && compare(k, len) <= 0) { ! 289: Resetx(utx); ! 290: if (xeq) { ! 291: w= th_of(k, v); ! 292: put(w, l); ! 293: release(w); ! 294: } ! 295: k= sum(k1= k, one); release(k1); ! 296: tx= vtx; comm_suite(); ! 297: } ! 298: release(k); release(len); ! 299: } ! 300: xeq= xeq0; restore_env(e0); ! 301: release(v); release(l); ! 302: return Yes; ! 303: } ! 304: return No; ! 305: default: return No; ! 306: } ! 307: } ! 308: ! 309: Hidden bool term_com() { ! 310: switch (Char(tx)) { ! 311: case 'F': if (atkw(FAIL)) { ! 312: upto(ceol, "FAIL"); ! 313: if (xeq) { ! 314: chckvtc(Rep); ! 315: resout= Fail; ! 316: terminated= Yes; ! 317: } else tx= ceol; ! 318: return Yes; ! 319: } ! 320: return No; ! 321: case 'Q': if (atkw(QUIT)) { ! 322: upto(ceol, "QUIT"); ! 323: if (xeq) { ! 324: if (cur_ilev == 0) bye(0); ! 325: chckvtc(Voi); ! 326: terminated= Yes; ! 327: } ! 328: return Yes; ! 329: } ! 330: return No; ! 331: case 'R': if (atkw(RETURN)) { ! 332: if (xeq) { ! 333: chckvtc(Ret); ! 334: resval= expr(ceol); ! 335: terminated= Yes; ! 336: } else tx= ceol; ! 337: return Yes; ! 338: } else if (atkw(REPORT)) { ! 339: if (xeq) { ! 340: chckvtc(Rep); ! 341: resout= test(ceol); ! 342: terminated= Yes; ! 343: } else tx= ceol; ! 344: return Yes; ! 345: } ! 346: return No; ! 347: case 'S': if (atkw(SUCCEED)) { ! 348: upto(ceol, "SUCCEED"); ! 349: if (xeq) { ! 350: chckvtc(Rep); ! 351: resout= Succ; ! 352: terminated= Yes; ! 353: } else tx= ceol; ! 354: return Yes; ! 355: } ! 356: return No; ! 357: default: return No; ! 358: } ! 359: } ! 360: ! 361: Hidden bool secret_com() { ! 362: switch (Char(tx)) { ! 363: case 'D': if (atkw("DEBUG")) { ! 364: Nex; ! 365: bugs= Yes; ! 366: return Yes; ! 367: } ! 368: return No; ! 369: case 'G': if (atkw("GR")) { ! 370: Nex; ! 371: prgr(); ! 372: return Yes; ! 373: } ! 374: return No; ! 375: case 'N': if (atkw("NO'DEBUG")) { ! 376: Nex; ! 377: bugs= No; ! 378: return Yes; ! 379: } else if (atkw("NO'TRACE")) { ! 380: Nex; ! 381: tracing= No; ! 382: return Yes; ! 383: } ! 384: return No; ! 385: case 'T': if (atkw("TRACE")) { ! 386: Nex; ! 387: tracing= Yes; ! 388: return Yes; ! 389: } ! 390: return No; ! 391: default: return No; ! 392: } ! 393: } ! 394: ! 395: Hidden Procedure chckvtc(re) literal re; { ! 396: if (cntxt != In_unit || resexp == Voi) { ! 397: if (re == Ret) ! 398: pprerr("RETURN e only allowed inside YIELD-unit or\n", ! 399: " expression-refinement"); ! 400: else if (re == Rep) ! 401: pprerr("REPORT t only allowed inside TEST-unit", ! 402: " or test-refinement"); ! 403: } ! 404: if (re != resexp) { ! 405: if (resexp == Ret) ! 406: pprerr( ! 407: "RETURN e must terminate YIELD-unit or expression-refinement", ""); ! 408: if (resexp == Rep) ! 409: pprerr( ! 410: "REPORT t must terminate TEST-unit or test-refinement", ""); ! 411: } ! 412: } ! 413: ! 414: Hidden bool expr_s() { ! 415: char c; ! 416: Skipsp(tx); ! 417: if (tx >= ceol) return No; ! 418: c= Char(tx); ! 419: return Letter(c) || Montormark(c) || Dig(c) || c == '.' || c == 'E' || ! 420: c == '(' || c == '{' || c == '\'' || c == '"'; ! 421: } ! 422: ! 423: intlet comcnt= 0; ! 424: ! 425: Visible Procedure command() { ! 426: if (++comcnt > 10000) { ! 427: putprmnv(); ! 428: comcnt= 1; ! 429: } ! 430: if (Char(tx) == Eotc) getline(); ! 431: debug("analyzing command"); ! 432: if (tracing) trace(); ! 433: if (Ceol(tx)); ! 434: else if (sim_com() || con_com() || ! 435: unit() || term_com() || ref_com() || udc() || ! 436: secret_com()) skipping= No; ! 437: else if (Char(tx) == ':' || Char(tx) == '=' || Char(tx) == '!') { ! 438: if (!interactive) parerr("special commands only interactively", ""); ! 439: if (!(cntxt == In_command && cur_ilev == 0)) parerr( ! 440: "special commands only on outermost level (no indentation)", ""); ! 441: special(); ! 442: } else if (cntxt == In_command && cur_ilev == 0 && expr_s()) { ! 443: value w= expr(ceol); ! 444: wri(w, Yes, No, No); ! 445: release(w); ! 446: } else {txptr tx0= tx; value uc= keyword(ceol); ! 447: tx= tx0; parerr("you have not told me HOW'TO ", strval(uc)); ! 448: } ! 449: To_eol(tx); ! 450: debug("command treated"); ! 451: } ! 452: ! 453: Visible Procedure comm_suite() { ! 454: intlet cil= cur_ilev; ! 455: if (ateol()) { ! 456: txptr tx0= tx; bool xeq0= xeq; ! 457: if (Char(tx+1) == Eotc) xeq= No; ! 458: while (ilev(No) > cil) { ! 459: findceol(); ! 460: command(); ! 461: if (terminated) return; ! 462: if (cur_ilev <= cil) goto brk1; ! 463: } ! 464: veli(); ! 465: brk1: if (xeq0 && !xeq) { ! 466: tx= tx0; xeq= Yes; ! 467: cur_ilev= cil; ! 468: while (ilev(No) > cil) { ! 469: findceol(); ! 470: command(); ! 471: if (terminated) return; ! 472: if (cur_ilev <= cil) goto brk2; ! 473: } ! 474: veli(); ! 475: brk2: ; ! 476: } ! 477: } else command(); ! 478: } ! 479: ! 480: Hidden Procedure alt_suite() { ! 481: intlet cil= cur_ilev; env e0= curnv; txptr utx, vtx; ! 482: bool xeq0= xeq, succ= !xeq, Else= No; ! 483: if (!ateol()) syserr("alt_suite not at end of line"); ! 484: while (ilev(No) > cil) { ! 485: findceol(); ! 486: if (Else) ! 487: parerr("after ELSE: ... no more alternatives are allowed", ""); ! 488: req(":", ceol, &utx, &vtx); ! 489: if (atkw(ELSE)) { ! 490: succ= Else= Yes; ! 491: upto(utx, "ELSE"); ! 492: tx= vtx; comm_suite(); ! 493: if (terminated) return; ! 494: } else { ! 495: if (xeq) succ= test(utx) == Succ; ! 496: xeq= xeq && succ; ! 497: tx= vtx; comm_suite(); ! 498: if (terminated) return; ! 499: xeq= !succ; ! 500: } ! 501: if (cur_ilev <= cil) goto brk; ! 502: } ! 503: veli(); ! 504: brk: if (!succ) error("none of the alternative tests of SELECT succeeds"); ! 505: xeq= xeq0; if (xeq) restore_env(e0); ! 506: }
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