| 1 | /* |
| 2 | * tclCmdMZ.c -- |
| 3 | * |
| 4 | * This file contains the top-level command routines for most of |
| 5 | * the Tcl built-in commands whose names begin with the letters |
| 6 | * M to Z. It contains only commands in the generic core (i.e. |
| 7 | * those that don't depend much upon UNIX facilities). |
| 8 | * |
| 9 | * Copyright 1987-1991 Regents of the University of California |
| 10 | * Permission to use, copy, modify, and distribute this |
| 11 | * software and its documentation for any purpose and without |
| 12 | * fee is hereby granted, provided that the above copyright |
| 13 | * notice appear in all copies. The University of California |
| 14 | * makes no representations about the suitability of this |
| 15 | * software for any purpose. It is provided "as is" without |
| 16 | * express or implied warranty. |
| 17 | */ |
| 18 | |
| 19 | #ifndef lint |
| 20 | static char rcsid[] = "$Header: /user6/ouster/tcl/RCS/tclCmdMZ.c,v 1.13 92/04/23 11:07:54 ouster Exp $ SPRITE (Berkeley)"; |
| 21 | #endif |
| 22 | |
| 23 | #include "tclint.h" |
| 24 | |
| 25 | /* |
| 26 | * Structure used to hold information about variable traces: |
| 27 | */ |
| 28 | |
| 29 | typedef struct { |
| 30 | int flags; /* Operations for which Tcl command is |
| 31 | * to be invoked. */ |
| 32 | int length; /* Number of non-NULL chars. in command. */ |
| 33 | char command[4]; /* Space for Tcl command to invoke. Actual |
| 34 | * size will be as large as necessary to |
| 35 | * hold command. This field must be the |
| 36 | * last in the structure, so that it can |
| 37 | * be larger than 4 bytes. */ |
| 38 | } TraceVarInfo; |
| 39 | |
| 40 | /* |
| 41 | * Forward declarations for procedures defined in this file: |
| 42 | */ |
| 43 | |
| 44 | static char * TraceVarProc _ANSI_ARGS_((ClientData clientData, |
| 45 | Tcl_Interp *interp, char *name1, char *name2, |
| 46 | int flags)); |
| 47 | \f |
| 48 | /* |
| 49 | *---------------------------------------------------------------------- |
| 50 | * |
| 51 | * Tcl_RegexpCmd -- |
| 52 | * |
| 53 | * This procedure is invoked to process the "regexp" Tcl command. |
| 54 | * See the user documentation for details on what it does. |
| 55 | * |
| 56 | * Results: |
| 57 | * A standard Tcl result. |
| 58 | * |
| 59 | * Side effects: |
| 60 | * See the user documentation. |
| 61 | * |
| 62 | *---------------------------------------------------------------------- |
| 63 | */ |
| 64 | |
| 65 | /* ARGSUSED */ |
| 66 | int |
| 67 | Tcl_RegexpCmd(dummy, interp, argc, argv) |
| 68 | ClientData dummy; /* Not used. */ |
| 69 | Tcl_Interp *interp; /* Current interpreter. */ |
| 70 | int argc; /* Number of arguments. */ |
| 71 | char **argv; /* Argument strings. */ |
| 72 | { |
| 73 | int noCase = 0; |
| 74 | int indices = 0; |
| 75 | regexp *regexpPtr; |
| 76 | char **argPtr, *string; |
| 77 | int match, i; |
| 78 | |
| 79 | if (argc < 3) { |
| 80 | wrongNumArgs: |
| 81 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 82 | " ?-nocase? exp string ?matchVar? ?subMatchVar ", |
| 83 | "subMatchVar ...?\"", (char *) NULL); |
| 84 | return TCL_ERROR; |
| 85 | } |
| 86 | argPtr = argv+1; |
| 87 | argc--; |
| 88 | while ((argc > 0) && (argPtr[0][0] == '-')) { |
| 89 | if (strcmp(argPtr[0], "-indices") == 0) { |
| 90 | argPtr++; |
| 91 | argc--; |
| 92 | indices = 1; |
| 93 | } else if (strcmp(argPtr[0], "-nocase") == 0) { |
| 94 | argPtr++; |
| 95 | argc--; |
| 96 | noCase = 1; |
| 97 | } else { |
| 98 | break; |
| 99 | } |
| 100 | } |
| 101 | if (argc < 2) { |
| 102 | goto wrongNumArgs; |
| 103 | } |
| 104 | regexpPtr = TclCompileRegexp(interp, argPtr[0]); |
| 105 | if (regexpPtr == NULL) { |
| 106 | return TCL_ERROR; |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Convert the string to lower case, if desired, and perform |
| 111 | * the match. |
| 112 | */ |
| 113 | |
| 114 | if (noCase) { |
| 115 | register char *dst, *src; |
| 116 | |
| 117 | string = (char *) ckalloc((unsigned) (strlen(argPtr[1]) + 1)); |
| 118 | for (src = argPtr[1], dst = string; *src != 0; src++, dst++) { |
| 119 | if (isupper(*src)) { |
| 120 | *dst = tolower(*src); |
| 121 | } else { |
| 122 | *dst = *src; |
| 123 | } |
| 124 | } |
| 125 | *dst = 0; |
| 126 | } else { |
| 127 | string = argPtr[1]; |
| 128 | } |
| 129 | tclRegexpError = NULL; |
| 130 | match = regexec(regexpPtr, string); |
| 131 | if (string != argPtr[1]) { |
| 132 | ckfree(string); |
| 133 | } |
| 134 | if (tclRegexpError != NULL) { |
| 135 | Tcl_AppendResult(interp, "error while matching pattern: ", |
| 136 | tclRegexpError, (char *) NULL); |
| 137 | return TCL_ERROR; |
| 138 | } |
| 139 | if (!match) { |
| 140 | interp->result = "0"; |
| 141 | return TCL_OK; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * If additional variable names have been specified, return |
| 146 | * index information in those variables. |
| 147 | */ |
| 148 | |
| 149 | argc -= 2; |
| 150 | if (argc > NSUBEXP) { |
| 151 | interp->result = "too many substring variables"; |
| 152 | return TCL_ERROR; |
| 153 | } |
| 154 | for (i = 0; i < argc; i++) { |
| 155 | char *result, info[50]; |
| 156 | |
| 157 | if (regexpPtr->startp[i] == NULL) { |
| 158 | if (indices) { |
| 159 | result = Tcl_SetVar(interp, argPtr[i+2], "-1 -1", 0); |
| 160 | } else { |
| 161 | result = Tcl_SetVar(interp, argPtr[i+2], "", 0); |
| 162 | } |
| 163 | } else { |
| 164 | if (indices) { |
| 165 | sprintf(info, "%d %d", regexpPtr->startp[i] - string, |
| 166 | regexpPtr->endp[i] - string - 1); |
| 167 | result = Tcl_SetVar(interp, argPtr[i+2], info, 0); |
| 168 | } else { |
| 169 | char savedChar, *first, *last; |
| 170 | |
| 171 | first = argPtr[1] + (regexpPtr->startp[i] - string); |
| 172 | last = argPtr[1] + (regexpPtr->endp[i] - string); |
| 173 | savedChar = *last; |
| 174 | *last = 0; |
| 175 | result = Tcl_SetVar(interp, argPtr[i+2], first, 0); |
| 176 | *last = savedChar; |
| 177 | } |
| 178 | } |
| 179 | if (result == NULL) { |
| 180 | Tcl_AppendResult(interp, "couldn't set variable \"", |
| 181 | argPtr[i+2], "\"", (char *) NULL); |
| 182 | return TCL_ERROR; |
| 183 | } |
| 184 | } |
| 185 | interp->result = "1"; |
| 186 | return TCL_OK; |
| 187 | } |
| 188 | \f |
| 189 | /* |
| 190 | *---------------------------------------------------------------------- |
| 191 | * |
| 192 | * Tcl_RegsubCmd -- |
| 193 | * |
| 194 | * This procedure is invoked to process the "regsub" Tcl command. |
| 195 | * See the user documentation for details on what it does. |
| 196 | * |
| 197 | * Results: |
| 198 | * A standard Tcl result. |
| 199 | * |
| 200 | * Side effects: |
| 201 | * See the user documentation. |
| 202 | * |
| 203 | *---------------------------------------------------------------------- |
| 204 | */ |
| 205 | |
| 206 | /* ARGSUSED */ |
| 207 | int |
| 208 | Tcl_RegsubCmd(dummy, interp, argc, argv) |
| 209 | ClientData dummy; /* Not used. */ |
| 210 | Tcl_Interp *interp; /* Current interpreter. */ |
| 211 | int argc; /* Number of arguments. */ |
| 212 | char **argv; /* Argument strings. */ |
| 213 | { |
| 214 | int noCase = 0, all = 0; |
| 215 | regexp *regexpPtr; |
| 216 | char *string, *p, *firstChar, *newValue, **argPtr; |
| 217 | int match, result, flags; |
| 218 | register char *src, c; |
| 219 | |
| 220 | if (argc < 5) { |
| 221 | wrongNumArgs: |
| 222 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 223 | " ?-nocase? ?-all? exp string subSpec varName\"", (char *) NULL); |
| 224 | return TCL_ERROR; |
| 225 | } |
| 226 | argPtr = argv+1; |
| 227 | argc--; |
| 228 | while (argPtr[0][0] == '-') { |
| 229 | if (strcmp(argPtr[0], "-nocase") == 0) { |
| 230 | argPtr++; |
| 231 | argc--; |
| 232 | noCase = 1; |
| 233 | } else if (strcmp(argPtr[0], "-all") == 0) { |
| 234 | argPtr++; |
| 235 | argc--; |
| 236 | all = 1; |
| 237 | } else { |
| 238 | break; |
| 239 | } |
| 240 | } |
| 241 | if (argc != 4) { |
| 242 | goto wrongNumArgs; |
| 243 | } |
| 244 | regexpPtr = TclCompileRegexp(interp, argPtr[0]); |
| 245 | if (regexpPtr == NULL) { |
| 246 | return TCL_ERROR; |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * Convert the string to lower case, if desired. |
| 251 | */ |
| 252 | |
| 253 | if (noCase) { |
| 254 | register char *dst; |
| 255 | |
| 256 | string = (char *) ckalloc((unsigned) (strlen(argPtr[1]) + 1)); |
| 257 | for (src = argPtr[1], dst = string; *src != 0; src++, dst++) { |
| 258 | if (isupper(*src)) { |
| 259 | *dst = tolower(*src); |
| 260 | } else { |
| 261 | *dst = *src; |
| 262 | } |
| 263 | } |
| 264 | *dst = 0; |
| 265 | } else { |
| 266 | string = argPtr[1]; |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * The following loop is to handle multiple matches within the |
| 271 | * same source string; each iteration handles one match and its |
| 272 | * corresponding substitution. If "-all" hasn't been specified |
| 273 | * then the loop body only gets executed once. |
| 274 | */ |
| 275 | |
| 276 | flags = 0; |
| 277 | for (p = string; *p != 0; ) { |
| 278 | tclRegexpError = NULL; |
| 279 | match = regexec(regexpPtr, p); |
| 280 | if (tclRegexpError != NULL) { |
| 281 | Tcl_AppendResult(interp, "error while matching pattern: ", |
| 282 | tclRegexpError, (char *) NULL); |
| 283 | result = TCL_ERROR; |
| 284 | goto done; |
| 285 | } |
| 286 | if (!match) { |
| 287 | break; |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Copy the portion of the source string before the match to the |
| 292 | * result variable. |
| 293 | */ |
| 294 | |
| 295 | src = argPtr[1] + (regexpPtr->startp[0] - string); |
| 296 | c = *src; |
| 297 | *src = 0; |
| 298 | newValue = Tcl_SetVar(interp, argPtr[3], argPtr[1] + (p - string), |
| 299 | flags); |
| 300 | *src = c; |
| 301 | flags = TCL_APPEND_VALUE; |
| 302 | if (newValue == NULL) { |
| 303 | cantSet: |
| 304 | Tcl_AppendResult(interp, "couldn't set variable \"", |
| 305 | argPtr[3], "\"", (char *) NULL); |
| 306 | result = TCL_ERROR; |
| 307 | goto done; |
| 308 | } |
| 309 | |
| 310 | /* |
| 311 | * Append the subSpec argument to the variable, making appropriate |
| 312 | * substitutions. This code is a bit hairy because of the backslash |
| 313 | * conventions and because the code saves up ranges of characters in |
| 314 | * subSpec to reduce the number of calls to Tcl_SetVar. |
| 315 | */ |
| 316 | |
| 317 | for (src = firstChar = argPtr[2], c = *src; c != 0; src++, c = *src) { |
| 318 | int index; |
| 319 | |
| 320 | if (c == '&') { |
| 321 | index = 0; |
| 322 | } else if (c == '\\') { |
| 323 | c = src[1]; |
| 324 | if ((c >= '0') && (c <= '9')) { |
| 325 | index = c - '0'; |
| 326 | } else if ((c == '\\') || (c == '&')) { |
| 327 | *src = c; |
| 328 | src[1] = 0; |
| 329 | newValue = Tcl_SetVar(interp, argPtr[3], firstChar, |
| 330 | TCL_APPEND_VALUE); |
| 331 | *src = '\\'; |
| 332 | src[1] = c; |
| 333 | if (newValue == NULL) { |
| 334 | goto cantSet; |
| 335 | } |
| 336 | firstChar = src+2; |
| 337 | src++; |
| 338 | continue; |
| 339 | } else { |
| 340 | continue; |
| 341 | } |
| 342 | } else { |
| 343 | continue; |
| 344 | } |
| 345 | if (firstChar != src) { |
| 346 | c = *src; |
| 347 | *src = 0; |
| 348 | newValue = Tcl_SetVar(interp, argPtr[3], firstChar, |
| 349 | TCL_APPEND_VALUE); |
| 350 | *src = c; |
| 351 | if (newValue == NULL) { |
| 352 | goto cantSet; |
| 353 | } |
| 354 | } |
| 355 | if ((index < NSUBEXP) && (regexpPtr->startp[index] != NULL) |
| 356 | && (regexpPtr->endp[index] != NULL)) { |
| 357 | char *first, *last, saved; |
| 358 | |
| 359 | first = argPtr[1] + (regexpPtr->startp[index] - string); |
| 360 | last = argPtr[1] + (regexpPtr->endp[index] - string); |
| 361 | saved = *last; |
| 362 | *last = 0; |
| 363 | newValue = Tcl_SetVar(interp, argPtr[3], first, |
| 364 | TCL_APPEND_VALUE); |
| 365 | *last = saved; |
| 366 | if (newValue == NULL) { |
| 367 | goto cantSet; |
| 368 | } |
| 369 | } |
| 370 | if (*src == '\\') { |
| 371 | src++; |
| 372 | } |
| 373 | firstChar = src+1; |
| 374 | } |
| 375 | if (firstChar != src) { |
| 376 | if (Tcl_SetVar(interp, argPtr[3], firstChar, |
| 377 | TCL_APPEND_VALUE) == NULL) { |
| 378 | goto cantSet; |
| 379 | } |
| 380 | } |
| 381 | p = regexpPtr->endp[0]; |
| 382 | if (!all) { |
| 383 | break; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | /* |
| 388 | * If there were no matches at all, then return a "0" result. |
| 389 | */ |
| 390 | |
| 391 | if (p == string) { |
| 392 | interp->result = "0"; |
| 393 | result = TCL_OK; |
| 394 | goto done; |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * Copy the portion of the source string after the last match to the |
| 399 | * result variable. |
| 400 | */ |
| 401 | |
| 402 | if (*p != 0) { |
| 403 | if (Tcl_SetVar(interp, argPtr[3], p, TCL_APPEND_VALUE) == NULL) { |
| 404 | goto cantSet; |
| 405 | } |
| 406 | } |
| 407 | interp->result = "1"; |
| 408 | result = TCL_OK; |
| 409 | |
| 410 | done: |
| 411 | if (string != argPtr[1]) { |
| 412 | ckfree(string); |
| 413 | } |
| 414 | return result; |
| 415 | } |
| 416 | \f |
| 417 | /* |
| 418 | *---------------------------------------------------------------------- |
| 419 | * |
| 420 | * Tcl_RenameCmd -- |
| 421 | * |
| 422 | * This procedure is invoked to process the "rename" Tcl command. |
| 423 | * See the user documentation for details on what it does. |
| 424 | * |
| 425 | * Results: |
| 426 | * A standard Tcl result. |
| 427 | * |
| 428 | * Side effects: |
| 429 | * See the user documentation. |
| 430 | * |
| 431 | *---------------------------------------------------------------------- |
| 432 | */ |
| 433 | |
| 434 | /* ARGSUSED */ |
| 435 | int |
| 436 | Tcl_RenameCmd(dummy, interp, argc, argv) |
| 437 | ClientData dummy; /* Not used. */ |
| 438 | Tcl_Interp *interp; /* Current interpreter. */ |
| 439 | int argc; /* Number of arguments. */ |
| 440 | char **argv; /* Argument strings. */ |
| 441 | { |
| 442 | register Command *cmdPtr; |
| 443 | Interp *iPtr = (Interp *) interp; |
| 444 | Tcl_HashEntry *hPtr; |
| 445 | int new; |
| 446 | |
| 447 | if (argc != 3) { |
| 448 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 449 | " oldName newName\"", (char *) NULL); |
| 450 | return TCL_ERROR; |
| 451 | } |
| 452 | if (argv[2][0] == '\0') { |
| 453 | if (Tcl_DeleteCommand(interp, argv[1]) != 0) { |
| 454 | Tcl_AppendResult(interp, "can't delete \"", argv[1], |
| 455 | "\": command doesn't exist", (char *) NULL); |
| 456 | return TCL_ERROR; |
| 457 | } |
| 458 | return TCL_OK; |
| 459 | } |
| 460 | hPtr = Tcl_FindHashEntry(&iPtr->commandTable, argv[2]); |
| 461 | if (hPtr != NULL) { |
| 462 | Tcl_AppendResult(interp, "can't rename to \"", argv[2], |
| 463 | "\": command already exists", (char *) NULL); |
| 464 | return TCL_ERROR; |
| 465 | } |
| 466 | hPtr = Tcl_FindHashEntry(&iPtr->commandTable, argv[1]); |
| 467 | if (hPtr == NULL) { |
| 468 | Tcl_AppendResult(interp, "can't rename \"", argv[1], |
| 469 | "\": command doesn't exist", (char *) NULL); |
| 470 | return TCL_ERROR; |
| 471 | } |
| 472 | cmdPtr = (Command *) Tcl_GetHashValue(hPtr); |
| 473 | Tcl_DeleteHashEntry(hPtr); |
| 474 | hPtr = Tcl_CreateHashEntry(&iPtr->commandTable, argv[2], &new); |
| 475 | Tcl_SetHashValue(hPtr, cmdPtr); |
| 476 | return TCL_OK; |
| 477 | } |
| 478 | \f |
| 479 | /* |
| 480 | *---------------------------------------------------------------------- |
| 481 | * |
| 482 | * Tcl_ReturnCmd -- |
| 483 | * |
| 484 | * This procedure is invoked to process the "return" Tcl command. |
| 485 | * See the user documentation for details on what it does. |
| 486 | * |
| 487 | * Results: |
| 488 | * A standard Tcl result. |
| 489 | * |
| 490 | * Side effects: |
| 491 | * See the user documentation. |
| 492 | * |
| 493 | *---------------------------------------------------------------------- |
| 494 | */ |
| 495 | |
| 496 | /* ARGSUSED */ |
| 497 | int |
| 498 | Tcl_ReturnCmd(dummy, interp, argc, argv) |
| 499 | ClientData dummy; /* Not used. */ |
| 500 | Tcl_Interp *interp; /* Current interpreter. */ |
| 501 | int argc; /* Number of arguments. */ |
| 502 | char **argv; /* Argument strings. */ |
| 503 | { |
| 504 | if (argc > 2) { |
| 505 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 506 | " ?value?\"", (char *) NULL); |
| 507 | return TCL_ERROR; |
| 508 | } |
| 509 | if (argc == 2) { |
| 510 | Tcl_SetResult(interp, argv[1], TCL_VOLATILE); |
| 511 | } |
| 512 | return TCL_RETURN; |
| 513 | } |
| 514 | \f |
| 515 | /* |
| 516 | *---------------------------------------------------------------------- |
| 517 | * |
| 518 | * Tcl_ScanCmd -- |
| 519 | * |
| 520 | * This procedure is invoked to process the "scan" Tcl command. |
| 521 | * See the user documentation for details on what it does. |
| 522 | * |
| 523 | * Results: |
| 524 | * A standard Tcl result. |
| 525 | * |
| 526 | * Side effects: |
| 527 | * See the user documentation. |
| 528 | * |
| 529 | *---------------------------------------------------------------------- |
| 530 | */ |
| 531 | |
| 532 | /* ARGSUSED */ |
| 533 | int |
| 534 | Tcl_ScanCmd(dummy, interp, argc, argv) |
| 535 | ClientData dummy; /* Not used. */ |
| 536 | Tcl_Interp *interp; /* Current interpreter. */ |
| 537 | int argc; /* Number of arguments. */ |
| 538 | char **argv; /* Argument strings. */ |
| 539 | { |
| 540 | int arg1Length; /* Number of bytes in argument to be |
| 541 | * scanned. This gives an upper limit |
| 542 | * on string field sizes. */ |
| 543 | # define MAX_FIELDS 20 |
| 544 | typedef struct { |
| 545 | char fmt; /* Format for field. */ |
| 546 | int size; /* How many bytes to allow for |
| 547 | * field. */ |
| 548 | char *location; /* Where field will be stored. */ |
| 549 | } Field; |
| 550 | Field fields[MAX_FIELDS]; /* Info about all the fields in the |
| 551 | * format string. */ |
| 552 | register Field *curField; |
| 553 | int numFields = 0; /* Number of fields actually |
| 554 | * specified. */ |
| 555 | int suppress; /* Current field is assignment- |
| 556 | * suppressed. */ |
| 557 | int totalSize = 0; /* Number of bytes needed to store |
| 558 | * all results combined. */ |
| 559 | char *results; /* Where scanned output goes. */ |
| 560 | int numScanned; /* sscanf's result. */ |
| 561 | register char *fmt; |
| 562 | int i, widthSpecified; |
| 563 | |
| 564 | if (argc < 3) { |
| 565 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 566 | " string format ?varName varName ...?\"", (char *) NULL); |
| 567 | return TCL_ERROR; |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * This procedure operates in four stages: |
| 572 | * 1. Scan the format string, collecting information about each field. |
| 573 | * 2. Allocate an array to hold all of the scanned fields. |
| 574 | * 3. Call sscanf to do all the dirty work, and have it store the |
| 575 | * parsed fields in the array. |
| 576 | * 4. Pick off the fields from the array and assign them to variables. |
| 577 | */ |
| 578 | |
| 579 | arg1Length = (strlen(argv[1]) + 4) & ~03; |
| 580 | for (fmt = argv[2]; *fmt != 0; fmt++) { |
| 581 | if (*fmt != '%') { |
| 582 | continue; |
| 583 | } |
| 584 | fmt++; |
| 585 | if (*fmt == '*') { |
| 586 | suppress = 1; |
| 587 | fmt++; |
| 588 | } else { |
| 589 | suppress = 0; |
| 590 | } |
| 591 | widthSpecified = 0; |
| 592 | while (isdigit(*fmt)) { |
| 593 | widthSpecified = 1; |
| 594 | fmt++; |
| 595 | } |
| 596 | if (suppress) { |
| 597 | continue; |
| 598 | } |
| 599 | if (numFields == MAX_FIELDS) { |
| 600 | interp->result = "too many fields to scan"; |
| 601 | return TCL_ERROR; |
| 602 | } |
| 603 | curField = &fields[numFields]; |
| 604 | numFields++; |
| 605 | switch (*fmt) { |
| 606 | case 'D': |
| 607 | case 'O': |
| 608 | case 'X': |
| 609 | case 'd': |
| 610 | case 'o': |
| 611 | case 'x': |
| 612 | curField->fmt = 'd'; |
| 613 | curField->size = sizeof(int); |
| 614 | break; |
| 615 | |
| 616 | case 's': |
| 617 | curField->fmt = 's'; |
| 618 | curField->size = arg1Length; |
| 619 | break; |
| 620 | |
| 621 | case 'c': |
| 622 | if (widthSpecified) { |
| 623 | interp->result = |
| 624 | "field width may not be specified in %c conversion"; |
| 625 | return TCL_ERROR; |
| 626 | } |
| 627 | curField->fmt = 'c'; |
| 628 | curField->size = sizeof(int); |
| 629 | break; |
| 630 | |
| 631 | case 'E': |
| 632 | case 'F': |
| 633 | curField->fmt = 'F'; |
| 634 | curField->size = sizeof(double); |
| 635 | break; |
| 636 | |
| 637 | case 'e': |
| 638 | case 'f': |
| 639 | curField->fmt = 'f'; |
| 640 | curField->size = sizeof(float); |
| 641 | break; |
| 642 | |
| 643 | case '[': |
| 644 | curField->fmt = 's'; |
| 645 | curField->size = arg1Length; |
| 646 | do { |
| 647 | fmt++; |
| 648 | } while (*fmt != ']'); |
| 649 | break; |
| 650 | |
| 651 | default: |
| 652 | sprintf(interp->result, "bad scan conversion character \"%c\"", |
| 653 | *fmt); |
| 654 | return TCL_ERROR; |
| 655 | } |
| 656 | totalSize += curField->size; |
| 657 | } |
| 658 | |
| 659 | if (numFields != (argc-3)) { |
| 660 | interp->result = |
| 661 | "different numbers of variable names and field specifiers"; |
| 662 | return TCL_ERROR; |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Step 2: |
| 667 | */ |
| 668 | |
| 669 | results = (char *) ckalloc((unsigned) totalSize); |
| 670 | for (i = 0, totalSize = 0, curField = fields; |
| 671 | i < numFields; i++, curField++) { |
| 672 | curField->location = results + totalSize; |
| 673 | totalSize += curField->size; |
| 674 | } |
| 675 | |
| 676 | /* |
| 677 | * Step 3: |
| 678 | */ |
| 679 | |
| 680 | numScanned = sscanf(argv[1], argv[2], |
| 681 | fields[0].location, fields[1].location, fields[2].location, |
| 682 | fields[3].location, fields[4].location, fields[5].location, |
| 683 | fields[6].location, fields[7].location, fields[8].location, |
| 684 | fields[9].location, fields[10].location, fields[11].location, |
| 685 | fields[12].location, fields[13].location, fields[14].location, |
| 686 | fields[15].location, fields[16].location, fields[17].location, |
| 687 | fields[18].location, fields[19].location); |
| 688 | |
| 689 | /* |
| 690 | * Step 4: |
| 691 | */ |
| 692 | |
| 693 | if (numScanned < numFields) { |
| 694 | numFields = numScanned; |
| 695 | } |
| 696 | for (i = 0, curField = fields; i < numFields; i++, curField++) { |
| 697 | switch (curField->fmt) { |
| 698 | char string[120]; |
| 699 | |
| 700 | case 'd': |
| 701 | sprintf(string, "%d", *((int *) curField->location)); |
| 702 | if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { |
| 703 | storeError: |
| 704 | Tcl_AppendResult(interp, |
| 705 | "couldn't set variable \"", argv[i+3], "\"", |
| 706 | (char *) NULL); |
| 707 | ckfree((char *) results); |
| 708 | return TCL_ERROR; |
| 709 | } |
| 710 | break; |
| 711 | |
| 712 | case 'c': |
| 713 | sprintf(string, "%d", *((char *) curField->location) & 0xff); |
| 714 | if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { |
| 715 | goto storeError; |
| 716 | } |
| 717 | break; |
| 718 | |
| 719 | case 's': |
| 720 | if (Tcl_SetVar(interp, argv[i+3], curField->location, 0) |
| 721 | == NULL) { |
| 722 | goto storeError; |
| 723 | } |
| 724 | break; |
| 725 | |
| 726 | case 'F': |
| 727 | sprintf(string, "%g", *((double *) curField->location)); |
| 728 | if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { |
| 729 | goto storeError; |
| 730 | } |
| 731 | break; |
| 732 | |
| 733 | case 'f': |
| 734 | sprintf(string, "%g", *((float *) curField->location)); |
| 735 | if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { |
| 736 | goto storeError; |
| 737 | } |
| 738 | break; |
| 739 | } |
| 740 | } |
| 741 | ckfree(results); |
| 742 | sprintf(interp->result, "%d", numScanned); |
| 743 | return TCL_OK; |
| 744 | } |
| 745 | \f |
| 746 | /* |
| 747 | *---------------------------------------------------------------------- |
| 748 | * |
| 749 | * Tcl_SplitCmd -- |
| 750 | * |
| 751 | * This procedure is invoked to process the "split" Tcl command. |
| 752 | * See the user documentation for details on what it does. |
| 753 | * |
| 754 | * Results: |
| 755 | * A standard Tcl result. |
| 756 | * |
| 757 | * Side effects: |
| 758 | * See the user documentation. |
| 759 | * |
| 760 | *---------------------------------------------------------------------- |
| 761 | */ |
| 762 | |
| 763 | /* ARGSUSED */ |
| 764 | int |
| 765 | Tcl_SplitCmd(dummy, interp, argc, argv) |
| 766 | ClientData dummy; /* Not used. */ |
| 767 | Tcl_Interp *interp; /* Current interpreter. */ |
| 768 | int argc; /* Number of arguments. */ |
| 769 | char **argv; /* Argument strings. */ |
| 770 | { |
| 771 | char *splitChars; |
| 772 | register char *p, *p2; |
| 773 | char *elementStart; |
| 774 | |
| 775 | if (argc == 2) { |
| 776 | splitChars = " \n\t\r"; |
| 777 | } else if (argc == 3) { |
| 778 | splitChars = argv[2]; |
| 779 | } else { |
| 780 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 781 | " string ?splitChars?\"", (char *) NULL); |
| 782 | return TCL_ERROR; |
| 783 | } |
| 784 | |
| 785 | /* |
| 786 | * Handle the special case of splitting on every character. |
| 787 | */ |
| 788 | |
| 789 | if (*splitChars == 0) { |
| 790 | char string[2]; |
| 791 | string[1] = 0; |
| 792 | for (p = argv[1]; *p != 0; p++) { |
| 793 | string[0] = *p; |
| 794 | Tcl_AppendElement(interp, string, 0); |
| 795 | } |
| 796 | return TCL_OK; |
| 797 | } |
| 798 | |
| 799 | /* |
| 800 | * Normal case: split on any of a given set of characters. |
| 801 | * Discard instances of the split characters. |
| 802 | */ |
| 803 | |
| 804 | for (p = elementStart = argv[1]; *p != 0; p++) { |
| 805 | char c = *p; |
| 806 | for (p2 = splitChars; *p2 != 0; p2++) { |
| 807 | if (*p2 == c) { |
| 808 | *p = 0; |
| 809 | Tcl_AppendElement(interp, elementStart, 0); |
| 810 | *p = c; |
| 811 | elementStart = p+1; |
| 812 | break; |
| 813 | } |
| 814 | } |
| 815 | } |
| 816 | if (p != argv[1]) { |
| 817 | Tcl_AppendElement(interp, elementStart, 0); |
| 818 | } |
| 819 | return TCL_OK; |
| 820 | } |
| 821 | \f |
| 822 | /* |
| 823 | *---------------------------------------------------------------------- |
| 824 | * |
| 825 | * Tcl_StringCmd -- |
| 826 | * |
| 827 | * This procedure is invoked to process the "string" Tcl command. |
| 828 | * See the user documentation for details on what it does. |
| 829 | * |
| 830 | * Results: |
| 831 | * A standard Tcl result. |
| 832 | * |
| 833 | * Side effects: |
| 834 | * See the user documentation. |
| 835 | * |
| 836 | *---------------------------------------------------------------------- |
| 837 | */ |
| 838 | |
| 839 | /* ARGSUSED */ |
| 840 | int |
| 841 | Tcl_StringCmd(dummy, interp, argc, argv) |
| 842 | ClientData dummy; /* Not used. */ |
| 843 | Tcl_Interp *interp; /* Current interpreter. */ |
| 844 | int argc; /* Number of arguments. */ |
| 845 | char **argv; /* Argument strings. */ |
| 846 | { |
| 847 | int length; |
| 848 | register char *p, c; |
| 849 | int match; |
| 850 | int first; |
| 851 | int left = 0, right = 0; |
| 852 | |
| 853 | if (argc < 2) { |
| 854 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 855 | " option arg ?arg ...?\"", (char *) NULL); |
| 856 | return TCL_ERROR; |
| 857 | } |
| 858 | c = argv[1][0]; |
| 859 | length = strlen(argv[1]); |
| 860 | if ((c == 'c') && (strncmp(argv[1], "compare", length) == 0)) { |
| 861 | if (argc != 4) { |
| 862 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 863 | " compare string1 string2\"", (char *) NULL); |
| 864 | return TCL_ERROR; |
| 865 | } |
| 866 | match = strcmp(argv[2], argv[3]); |
| 867 | if (match > 0) { |
| 868 | interp->result = "1"; |
| 869 | } else if (match < 0) { |
| 870 | interp->result = "-1"; |
| 871 | } else { |
| 872 | interp->result = "0"; |
| 873 | } |
| 874 | return TCL_OK; |
| 875 | } else if ((c == 'f') && (strncmp(argv[1], "first", length) == 0)) { |
| 876 | if (argc != 4) { |
| 877 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 878 | " first string1 string2\"", (char *) NULL); |
| 879 | return TCL_ERROR; |
| 880 | } |
| 881 | first = 1; |
| 882 | |
| 883 | firstLast: |
| 884 | match = -1; |
| 885 | c = *argv[2]; |
| 886 | length = strlen(argv[2]); |
| 887 | for (p = argv[3]; *p != 0; p++) { |
| 888 | if (*p != c) { |
| 889 | continue; |
| 890 | } |
| 891 | if (strncmp(argv[2], p, length) == 0) { |
| 892 | match = p-argv[3]; |
| 893 | if (first) { |
| 894 | break; |
| 895 | } |
| 896 | } |
| 897 | } |
| 898 | sprintf(interp->result, "%d", match); |
| 899 | return TCL_OK; |
| 900 | } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)) { |
| 901 | int index; |
| 902 | |
| 903 | if (argc != 4) { |
| 904 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 905 | " index string charIndex\"", (char *) NULL); |
| 906 | return TCL_ERROR; |
| 907 | } |
| 908 | if (Tcl_GetInt(interp, argv[3], &index) != TCL_OK) { |
| 909 | return TCL_ERROR; |
| 910 | } |
| 911 | if ((index >= 0) && (index < strlen(argv[2]))) { |
| 912 | interp->result[0] = argv[2][index]; |
| 913 | interp->result[1] = 0; |
| 914 | } |
| 915 | return TCL_OK; |
| 916 | } else if ((c == 'l') && (strncmp(argv[1], "last", length) == 0) |
| 917 | && (length >= 2)) { |
| 918 | if (argc != 4) { |
| 919 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 920 | " last string1 string2\"", (char *) NULL); |
| 921 | return TCL_ERROR; |
| 922 | } |
| 923 | first = 0; |
| 924 | goto firstLast; |
| 925 | } else if ((c == 'l') && (strncmp(argv[1], "length", length) == 0) |
| 926 | && (length >= 2)) { |
| 927 | if (argc != 3) { |
| 928 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 929 | " length string\"", (char *) NULL); |
| 930 | return TCL_ERROR; |
| 931 | } |
| 932 | sprintf(interp->result, "%d", strlen(argv[2])); |
| 933 | return TCL_OK; |
| 934 | } else if ((c == 'm') && (strncmp(argv[1], "match", length) == 0)) { |
| 935 | if (argc != 4) { |
| 936 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 937 | " match pattern string\"", (char *) NULL); |
| 938 | return TCL_ERROR; |
| 939 | } |
| 940 | if (Tcl_StringMatch(argv[3], argv[2]) != 0) { |
| 941 | interp->result = "1"; |
| 942 | } else { |
| 943 | interp->result = "0"; |
| 944 | } |
| 945 | return TCL_OK; |
| 946 | } else if ((c == 'r') && (strncmp(argv[1], "range", length) == 0)) { |
| 947 | int first, last, stringLength; |
| 948 | |
| 949 | if (argc != 5) { |
| 950 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 951 | " range string first last\"", (char *) NULL); |
| 952 | return TCL_ERROR; |
| 953 | } |
| 954 | stringLength = strlen(argv[2]); |
| 955 | if (Tcl_GetInt(interp, argv[3], &first) != TCL_OK) { |
| 956 | return TCL_ERROR; |
| 957 | } |
| 958 | if ((*argv[4] == 'e') |
| 959 | && (strncmp(argv[4], "end", strlen(argv[4])) == 0)) { |
| 960 | last = stringLength-1; |
| 961 | } else { |
| 962 | if (Tcl_GetInt(interp, argv[4], &last) != TCL_OK) { |
| 963 | Tcl_ResetResult(interp); |
| 964 | Tcl_AppendResult(interp, |
| 965 | "expected integer or \"end\" but got \"", |
| 966 | argv[4], "\"", (char *) NULL); |
| 967 | return TCL_ERROR; |
| 968 | } |
| 969 | } |
| 970 | if (first < 0) { |
| 971 | first = 0; |
| 972 | } |
| 973 | if (last >= stringLength) { |
| 974 | last = stringLength-1; |
| 975 | } |
| 976 | if (last >= first) { |
| 977 | char saved, *p; |
| 978 | |
| 979 | p = argv[2] + last + 1; |
| 980 | saved = *p; |
| 981 | *p = 0; |
| 982 | Tcl_SetResult(interp, argv[2] + first, TCL_VOLATILE); |
| 983 | *p = saved; |
| 984 | } |
| 985 | return TCL_OK; |
| 986 | } else if ((c == 't') && (strncmp(argv[1], "tolower", length) == 0) |
| 987 | && (length >= 3)) { |
| 988 | register char *p; |
| 989 | |
| 990 | if (argc != 3) { |
| 991 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 992 | " tolower string\"", (char *) NULL); |
| 993 | return TCL_ERROR; |
| 994 | } |
| 995 | Tcl_SetResult(interp, argv[2], TCL_VOLATILE); |
| 996 | for (p = interp->result; *p != 0; p++) { |
| 997 | if (isupper(*p)) { |
| 998 | *p = tolower(*p); |
| 999 | } |
| 1000 | } |
| 1001 | return TCL_OK; |
| 1002 | } else if ((c == 't') && (strncmp(argv[1], "toupper", length) == 0) |
| 1003 | && (length >= 3)) { |
| 1004 | register char *p; |
| 1005 | |
| 1006 | if (argc != 3) { |
| 1007 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 1008 | " toupper string\"", (char *) NULL); |
| 1009 | return TCL_ERROR; |
| 1010 | } |
| 1011 | Tcl_SetResult(interp, argv[2], TCL_VOLATILE); |
| 1012 | for (p = interp->result; *p != 0; p++) { |
| 1013 | if (islower(*p)) { |
| 1014 | *p = toupper(*p); |
| 1015 | } |
| 1016 | } |
| 1017 | return TCL_OK; |
| 1018 | } else if ((c == 't') && (strncmp(argv[1], "trim", length) == 0) |
| 1019 | && (length == 4)) { |
| 1020 | char *trimChars; |
| 1021 | register char *p, *checkPtr; |
| 1022 | |
| 1023 | left = right = 1; |
| 1024 | |
| 1025 | trim: |
| 1026 | if (argc == 4) { |
| 1027 | trimChars = argv[3]; |
| 1028 | } else if (argc == 3) { |
| 1029 | trimChars = " \t\n\r"; |
| 1030 | } else { |
| 1031 | Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 1032 | " ", argv[1], " string ?chars?\"", (char *) NULL); |
| 1033 | return TCL_ERROR; |
| 1034 | } |
| 1035 | p = argv[2]; |
| 1036 | if (left) { |
| 1037 | for (c = *p; c != 0; p++, c = *p) { |
| 1038 | for (checkPtr = trimChars; *checkPtr != c; checkPtr++) { |
| 1039 | if (*checkPtr == 0) { |
| 1040 | goto doneLeft; |
| 1041 | } |
| 1042 | } |
| 1043 | } |
| 1044 | } |
| 1045 | doneLeft: |
| 1046 | Tcl_SetResult(interp, p, TCL_VOLATILE); |
| 1047 | if (right) { |
| 1048 | char *donePtr; |
| 1049 | |
| 1050 | p = interp->result + strlen(interp->result) - 1; |
| 1051 | donePtr = &interp->result[-1]; |
| 1052 | for (c = *p; p != donePtr; p--, c = *p) { |
| 1053 | for (checkPtr = trimChars; *checkPtr != c; checkPtr++) { |
| 1054 | if (*checkPtr == 0) { |
| 1055 | goto doneRight; |
| 1056 | } |
| 1057 | } |
| 1058 | } |
| 1059 | doneRight: |
| 1060 | p[1] = 0; |
| 1061 | } |
| 1062 | return TCL_OK; |
| 1063 | } else if ((c == 't') && (strncmp(argv[1], "trimleft", length) == 0) |
| 1064 | && (length > 4)) { |
| 1065 | left = 1; |
| 1066 | argv[1] = "trimleft"; |
| 1067 | goto trim; |
| 1068 | } else if ((c == 't') && (strncmp(argv[1], "trimright", length) == 0) |
| 1069 | && (length > 4)) { |
| 1070 | right = 1; |
| 1071 | argv[1] = "trimright"; |
| 1072 | goto trim; |
| 1073 | } else { |
| 1074 | Tcl_AppendResult(interp, "bad option \"", argv[1], |
| 1075 | "\": should be compare, first, index, last, length, match, ", |
| 1076 | "range, tolower, toupper, trim, trimleft, or trimright", |
| 1077 | (char *) NULL); |
| 1078 | return TCL_ERROR; |
| 1079 | } |
| 1080 | } |
| 1081 | \f |
| 1082 | /* |
| 1083 | *---------------------------------------------------------------------- |
| 1084 | * |
| 1085 | * Tcl_TraceCmd -- |
| 1086 | * |
| 1087 | * This procedure is invoked to process the "trace" Tcl command. |
| 1088 | * See the user documentation for details on what it does. |
| 1089 | * |
| 1090 | * Results: |
| 1091 | * A standard Tcl result. |
| 1092 | * |
| 1093 | * Side effects: |
| 1094 | * See the user documentation. |
| 1095 | * |
| 1096 | *---------------------------------------------------------------------- |
| 1097 | */ |
| 1098 | |
| 1099 | /* ARGSUSED */ |
| 1100 | int |
| 1101 | Tcl_TraceCmd(dummy, interp, argc, argv) |
| 1102 | ClientData dummy; /* Not used. */ |
| 1103 | Tcl_Interp *interp; /* Current interpreter. */ |
| 1104 | int argc; /* Number of arguments. */ |
| 1105 | char **argv; /* Argument strings. */ |
| 1106 | { |
| 1107 | char c; |
| 1108 | int length; |
| 1109 | |
| 1110 | if (argc < 2) { |
| 1111 | Tcl_AppendResult(interp, "too few args: should be \"", |
| 1112 | argv[0], " option [arg arg ...]\"", (char *) NULL); |
| 1113 | return TCL_ERROR; |
| 1114 | } |
| 1115 | c = argv[1][1]; |
| 1116 | length = strlen(argv[1]); |
| 1117 | if ((c == 'a') && (strncmp(argv[1], "variable", length) == 0) |
| 1118 | && (length >= 2)) { |
| 1119 | char *p; |
| 1120 | int flags, length; |
| 1121 | TraceVarInfo *tvarPtr; |
| 1122 | |
| 1123 | if (argc != 5) { |
| 1124 | Tcl_AppendResult(interp, "wrong # args: should be \"", |
| 1125 | argv[0], " variable name ops command\"", (char *) NULL); |
| 1126 | return TCL_ERROR; |
| 1127 | } |
| 1128 | |
| 1129 | flags = 0; |
| 1130 | for (p = argv[3] ; *p != 0; p++) { |
| 1131 | if (*p == 'r') { |
| 1132 | flags |= TCL_TRACE_READS; |
| 1133 | } else if (*p == 'w') { |
| 1134 | flags |= TCL_TRACE_WRITES; |
| 1135 | } else if (*p == 'u') { |
| 1136 | flags |= TCL_TRACE_UNSETS; |
| 1137 | } else { |
| 1138 | goto badOps; |
| 1139 | } |
| 1140 | } |
| 1141 | if (flags == 0) { |
| 1142 | goto badOps; |
| 1143 | } |
| 1144 | |
| 1145 | length = strlen(argv[4]); |
| 1146 | tvarPtr = (TraceVarInfo *) ckalloc((unsigned) |
| 1147 | (sizeof(TraceVarInfo) - sizeof(tvarPtr->command) + length + 1)); |
| 1148 | tvarPtr->flags = flags; |
| 1149 | tvarPtr->length = length; |
| 1150 | flags |= TCL_TRACE_UNSETS; |
| 1151 | strcpy(tvarPtr->command, argv[4]); |
| 1152 | if (Tcl_TraceVar(interp, argv[2], flags, TraceVarProc, |
| 1153 | (ClientData) tvarPtr) != TCL_OK) { |
| 1154 | ckfree((char *) tvarPtr); |
| 1155 | return TCL_ERROR; |
| 1156 | } |
| 1157 | } else if ((c == 'd') && (strncmp(argv[1], "vdelete", length) |
| 1158 | && (length >= 2)) == 0) { |
| 1159 | char *p; |
| 1160 | int flags, length; |
| 1161 | TraceVarInfo *tvarPtr; |
| 1162 | ClientData clientData; |
| 1163 | |
| 1164 | if (argc != 5) { |
| 1165 | Tcl_AppendResult(interp, "wrong # args: should be \"", |
| 1166 | argv[0], " vdelete name ops command\"", (char *) NULL); |
| 1167 | return TCL_ERROR; |
| 1168 | } |
| 1169 | |
| 1170 | flags = 0; |
| 1171 | for (p = argv[3] ; *p != 0; p++) { |
| 1172 | if (*p == 'r') { |
| 1173 | flags |= TCL_TRACE_READS; |
| 1174 | } else if (*p == 'w') { |
| 1175 | flags |= TCL_TRACE_WRITES; |
| 1176 | } else if (*p == 'u') { |
| 1177 | flags |= TCL_TRACE_UNSETS; |
| 1178 | } else { |
| 1179 | goto badOps; |
| 1180 | } |
| 1181 | } |
| 1182 | if (flags == 0) { |
| 1183 | goto badOps; |
| 1184 | } |
| 1185 | |
| 1186 | /* |
| 1187 | * Search through all of our traces on this variable to |
| 1188 | * see if there's one with the given command. If so, then |
| 1189 | * delete the first one that matches. |
| 1190 | */ |
| 1191 | |
| 1192 | length = strlen(argv[4]); |
| 1193 | clientData = 0; |
| 1194 | while ((clientData = Tcl_VarTraceInfo(interp, argv[2], 0, |
| 1195 | TraceVarProc, clientData)) != 0) { |
| 1196 | tvarPtr = (TraceVarInfo *) clientData; |
| 1197 | if ((tvarPtr->length == length) && (tvarPtr->flags == flags) |
| 1198 | && (strncmp(argv[4], tvarPtr->command, length) == 0)) { |
| 1199 | Tcl_UntraceVar(interp, argv[2], flags | TCL_TRACE_UNSETS, |
| 1200 | TraceVarProc, clientData); |
| 1201 | ckfree((char *) tvarPtr); |
| 1202 | break; |
| 1203 | } |
| 1204 | } |
| 1205 | } else if ((c == 'i') && (strncmp(argv[1], "vinfo", length) == 0) |
| 1206 | && (length >= 2)) { |
| 1207 | ClientData clientData; |
| 1208 | char ops[4], *p; |
| 1209 | char *prefix = "{"; |
| 1210 | |
| 1211 | if (argc != 3) { |
| 1212 | Tcl_AppendResult(interp, "wrong # args: should be \"", |
| 1213 | argv[0], " vinfo name\"", (char *) NULL); |
| 1214 | return TCL_ERROR; |
| 1215 | } |
| 1216 | clientData = 0; |
| 1217 | while ((clientData = Tcl_VarTraceInfo(interp, argv[2], 0, |
| 1218 | TraceVarProc, clientData)) != 0) { |
| 1219 | TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData; |
| 1220 | p = ops; |
| 1221 | if (tvarPtr->flags & TCL_TRACE_READS) { |
| 1222 | *p = 'r'; |
| 1223 | p++; |
| 1224 | } |
| 1225 | if (tvarPtr->flags & TCL_TRACE_WRITES) { |
| 1226 | *p = 'w'; |
| 1227 | p++; |
| 1228 | } |
| 1229 | if (tvarPtr->flags & TCL_TRACE_UNSETS) { |
| 1230 | *p = 'u'; |
| 1231 | p++; |
| 1232 | } |
| 1233 | *p = '\0'; |
| 1234 | Tcl_AppendResult(interp, prefix, (char *) NULL); |
| 1235 | Tcl_AppendElement(interp, ops, 1); |
| 1236 | Tcl_AppendElement(interp, tvarPtr->command, 0); |
| 1237 | Tcl_AppendResult(interp, "}", (char *) NULL); |
| 1238 | prefix = " {"; |
| 1239 | } |
| 1240 | } else { |
| 1241 | Tcl_AppendResult(interp, "bad option \"", argv[1], |
| 1242 | "\": should be variable, vdelete, or vinfo", |
| 1243 | (char *) NULL); |
| 1244 | return TCL_ERROR; |
| 1245 | } |
| 1246 | return TCL_OK; |
| 1247 | |
| 1248 | badOps: |
| 1249 | Tcl_AppendResult(interp, "bad operations \"", argv[3], |
| 1250 | "\": should be one or more of rwu", (char *) NULL); |
| 1251 | return TCL_ERROR; |
| 1252 | } |
| 1253 | \f |
| 1254 | /* |
| 1255 | *---------------------------------------------------------------------- |
| 1256 | * |
| 1257 | * TraceVarProc -- |
| 1258 | * |
| 1259 | * This procedure is called to handle variable accesses that have |
| 1260 | * been traced using the "trace" command. |
| 1261 | * |
| 1262 | * Results: |
| 1263 | * Normally returns NULL. If the trace command returns an error, |
| 1264 | * then this procedure returns an error string. |
| 1265 | * |
| 1266 | * Side effects: |
| 1267 | * Depends on the command associated with the trace. |
| 1268 | * |
| 1269 | *---------------------------------------------------------------------- |
| 1270 | */ |
| 1271 | |
| 1272 | /* ARGSUSED */ |
| 1273 | static char * |
| 1274 | TraceVarProc(clientData, interp, name1, name2, flags) |
| 1275 | ClientData clientData; /* Information about the variable trace. */ |
| 1276 | Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 1277 | char *name1; /* Name of variable or array. */ |
| 1278 | char *name2; /* Name of element within array; NULL means |
| 1279 | * scalar variable is being referenced. */ |
| 1280 | int flags; /* OR-ed bits giving operation and other |
| 1281 | * information. */ |
| 1282 | { |
| 1283 | TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData; |
| 1284 | char *result; |
| 1285 | int code, cmdLength, flags1, flags2; |
| 1286 | Interp dummy; |
| 1287 | #define STATIC_SIZE 199 |
| 1288 | char staticSpace[STATIC_SIZE+1]; |
| 1289 | char *cmdPtr, *p; |
| 1290 | |
| 1291 | result = NULL; |
| 1292 | if ((tvarPtr->flags & flags) && !(flags & TCL_INTERP_DESTROYED)) { |
| 1293 | |
| 1294 | /* |
| 1295 | * Generate a command to execute by appending list elements |
| 1296 | * for the two variable names and the operation. The five |
| 1297 | * extra characters are for three space, the opcode character, |
| 1298 | * and the terminating null. |
| 1299 | */ |
| 1300 | |
| 1301 | if (name2 == NULL) { |
| 1302 | name2 = ""; |
| 1303 | } |
| 1304 | cmdLength = tvarPtr->length + Tcl_ScanElement(name1, &flags1) + |
| 1305 | Tcl_ScanElement(name2, &flags2) + 5; |
| 1306 | if (cmdLength < STATIC_SIZE) { |
| 1307 | cmdPtr = staticSpace; |
| 1308 | } else { |
| 1309 | cmdPtr = (char *) ckalloc((unsigned) cmdLength); |
| 1310 | } |
| 1311 | p = cmdPtr; |
| 1312 | strcpy(p, tvarPtr->command); |
| 1313 | p += tvarPtr->length; |
| 1314 | *p = ' '; |
| 1315 | p++; |
| 1316 | p += Tcl_ConvertElement(name1, p, flags1); |
| 1317 | *p = ' '; |
| 1318 | p++; |
| 1319 | p += Tcl_ConvertElement(name2, p, flags2); |
| 1320 | *p = ' '; |
| 1321 | if (flags & TCL_TRACE_READS) { |
| 1322 | p[1] = 'r'; |
| 1323 | } else if (flags & TCL_TRACE_WRITES) { |
| 1324 | p[1] = 'w'; |
| 1325 | } else if (flags & TCL_TRACE_UNSETS) { |
| 1326 | p[1] = 'u'; |
| 1327 | } |
| 1328 | p[2] = '\0'; |
| 1329 | |
| 1330 | /* |
| 1331 | * Execute the command. Be careful to save and restore the |
| 1332 | * result from the interpreter used for the command. |
| 1333 | */ |
| 1334 | |
| 1335 | dummy.freeProc = interp->freeProc; |
| 1336 | if (interp->freeProc == 0) { |
| 1337 | Tcl_SetResult((Tcl_Interp *) &dummy, interp->result, TCL_VOLATILE); |
| 1338 | } else { |
| 1339 | dummy.result = interp->result; |
| 1340 | } |
| 1341 | code = Tcl_Eval(interp, cmdPtr, 0, (char **) NULL); |
| 1342 | if (cmdPtr != staticSpace) { |
| 1343 | ckfree(cmdPtr); |
| 1344 | } |
| 1345 | if (code != TCL_OK) { |
| 1346 | result = "access disallowed by trace command"; |
| 1347 | Tcl_ResetResult(interp); /* Must clear error state. */ |
| 1348 | } |
| 1349 | Tcl_FreeResult(interp); |
| 1350 | interp->result = dummy.result; |
| 1351 | interp->freeProc = dummy.freeProc; |
| 1352 | } |
| 1353 | if (flags & TCL_TRACE_DESTROYED) { |
| 1354 | ckfree((char *) tvarPtr); |
| 1355 | } |
| 1356 | return result; |
| 1357 | } |
| 1358 | \f |
| 1359 | /* |
| 1360 | *---------------------------------------------------------------------- |
| 1361 | * |
| 1362 | * Tcl_WhileCmd -- |
| 1363 | * |
| 1364 | * This procedure is invoked to process the "while" Tcl command. |
| 1365 | * See the user documentation for details on what it does. |
| 1366 | * |
| 1367 | * Results: |
| 1368 | * A standard Tcl result. |
| 1369 | * |
| 1370 | * Side effects: |
| 1371 | * See the user documentation. |
| 1372 | * |
| 1373 | *---------------------------------------------------------------------- |
| 1374 | */ |
| 1375 | |
| 1376 | /* ARGSUSED */ |
| 1377 | int |
| 1378 | Tcl_WhileCmd(dummy, interp, argc, argv) |
| 1379 | ClientData dummy; /* Not used. */ |
| 1380 | Tcl_Interp *interp; /* Current interpreter. */ |
| 1381 | int argc; /* Number of arguments. */ |
| 1382 | char **argv; /* Argument strings. */ |
| 1383 | { |
| 1384 | int result, value; |
| 1385 | |
| 1386 | if (argc != 3) { |
| 1387 | Tcl_AppendResult(interp, "wrong # args: should be \"", |
| 1388 | argv[0], " test command\"", (char *) NULL); |
| 1389 | return TCL_ERROR; |
| 1390 | } |
| 1391 | |
| 1392 | while (1) { |
| 1393 | result = Tcl_ExprBoolean(interp, argv[1], &value); |
| 1394 | if (result != TCL_OK) { |
| 1395 | return result; |
| 1396 | } |
| 1397 | if (!value) { |
| 1398 | break; |
| 1399 | } |
| 1400 | result = Tcl_Eval(interp, argv[2], 0, (char **) NULL); |
| 1401 | if (result == TCL_CONTINUE) { |
| 1402 | result = TCL_OK; |
| 1403 | } else if (result != TCL_OK) { |
| 1404 | if (result == TCL_ERROR) { |
| 1405 | char msg[60]; |
| 1406 | sprintf(msg, "\n (\"while\" body line %d)", |
| 1407 | interp->errorLine); |
| 1408 | Tcl_AddErrorInfo(interp, msg); |
| 1409 | } |
| 1410 | break; |
| 1411 | } |
| 1412 | } |
| 1413 | if (result == TCL_BREAK) { |
| 1414 | result = TCL_OK; |
| 1415 | } |
| 1416 | if (result == TCL_OK) { |
| 1417 | Tcl_ResetResult(interp); |
| 1418 | } |
| 1419 | return result; |
| 1420 | } |