| 1 | /* |
| 2 | * tclParse.c -- |
| 3 | * |
| 4 | * This file contains a collection of procedures that are used |
| 5 | * to parse Tcl commands or parts of commands (like quoted |
| 6 | * strings or nested sub-commands). |
| 7 | * |
| 8 | * Copyright 1991 Regents of the University of California. |
| 9 | * Permission to use, copy, modify, and distribute this |
| 10 | * software and its documentation for any purpose and without |
| 11 | * fee is hereby granted, provided that the above copyright |
| 12 | * notice appear in all copies. The University of California |
| 13 | * makes no representations about the suitability of this |
| 14 | * software for any purpose. It is provided "as is" without |
| 15 | * express or implied warranty. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | static char rcsid[] = "$Header: /user6/ouster/tcl/RCS/tclParse.c,v 1.21 92/06/08 09:32:37 ouster Exp $ SPRITE (Berkeley)"; |
| 20 | #endif |
| 21 | |
| 22 | #include "tclint.h" |
| 23 | |
| 24 | /* |
| 25 | * The following table assigns a type to each character. Only types |
| 26 | * meaningful to Tcl parsing are represented here. The table indexes |
| 27 | * all 256 characters, with the negative ones first, then the positive |
| 28 | * ones. |
| 29 | */ |
| 30 | |
| 31 | char tclTypeTable[] = { |
| 32 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 33 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 34 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 35 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 36 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 37 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 38 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 39 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 40 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 41 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 42 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 43 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 44 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 45 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 46 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 47 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 48 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 49 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 50 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 51 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 52 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 53 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 54 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 55 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 56 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 57 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 58 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 59 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 60 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 61 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 62 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 63 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 64 | TCL_COMMAND_END, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 65 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 66 | TCL_NORMAL, TCL_SPACE, TCL_COMMAND_END, TCL_SPACE, |
| 67 | TCL_SPACE, TCL_SPACE, TCL_NORMAL, TCL_NORMAL, |
| 68 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 69 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 70 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 71 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 72 | TCL_SPACE, TCL_NORMAL, TCL_QUOTE, TCL_NORMAL, |
| 73 | TCL_DOLLAR, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 74 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 75 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 76 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 77 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 78 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_COMMAND_END, |
| 79 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 80 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 81 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 82 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 83 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 84 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 85 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 86 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_OPEN_BRACKET, |
| 87 | TCL_BACKSLASH, TCL_COMMAND_END, TCL_NORMAL, TCL_NORMAL, |
| 88 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 89 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 90 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 91 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 92 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 93 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, |
| 94 | TCL_NORMAL, TCL_NORMAL, TCL_NORMAL, TCL_OPEN_BRACE, |
| 95 | TCL_NORMAL, TCL_CLOSE_BRACE, TCL_NORMAL, TCL_NORMAL, |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * Function prototypes for procedures local to this file: |
| 100 | */ |
| 101 | |
| 102 | static char * QuoteEnd _ANSI_ARGS_((char *string, int term)); |
| 103 | static char * VarNameEnd _ANSI_ARGS_((char *string)); |
| 104 | \f |
| 105 | /* |
| 106 | *---------------------------------------------------------------------- |
| 107 | * |
| 108 | * Tcl_Backslash -- |
| 109 | * |
| 110 | * Figure out how to handle a backslash sequence. |
| 111 | * |
| 112 | * Results: |
| 113 | * The return value is the character that should be substituted |
| 114 | * in place of the backslash sequence that starts at src, or 0 |
| 115 | * if the backslash sequence should be replace by nothing (e.g. |
| 116 | * backslash followed by newline). If readPtr isn't NULL then |
| 117 | * it is filled in with a count of the number of characters in |
| 118 | * the backslash sequence. Note: if the backslash isn't followed |
| 119 | * by characters that are understood here, then the backslash |
| 120 | * sequence is only considered to be one character long, and it |
| 121 | * is replaced by a backslash char. |
| 122 | * |
| 123 | * Side effects: |
| 124 | * None. |
| 125 | * |
| 126 | *---------------------------------------------------------------------- |
| 127 | */ |
| 128 | |
| 129 | char |
| 130 | Tcl_Backslash(src, readPtr) |
| 131 | char *src; /* Points to the backslash character of |
| 132 | * a backslash sequence. */ |
| 133 | int *readPtr; /* Fill in with number of characters read |
| 134 | * from src, unless NULL. */ |
| 135 | { |
| 136 | register char *p = src+1; |
| 137 | char result; |
| 138 | int count; |
| 139 | |
| 140 | count = 2; |
| 141 | |
| 142 | switch (*p) { |
| 143 | case 'b': |
| 144 | result = '\b'; |
| 145 | break; |
| 146 | case 'e': |
| 147 | result = 033; |
| 148 | break; |
| 149 | case 'f': |
| 150 | result = '\f'; |
| 151 | break; |
| 152 | case 'n': |
| 153 | result = '\n'; |
| 154 | break; |
| 155 | case 'r': |
| 156 | result = '\r'; |
| 157 | break; |
| 158 | case 't': |
| 159 | result = '\t'; |
| 160 | break; |
| 161 | case 'v': |
| 162 | result = '\v'; |
| 163 | break; |
| 164 | case 'C': |
| 165 | p++; |
| 166 | if (isspace(*p) || (*p == 0)) { |
| 167 | result = 'C'; |
| 168 | count = 1; |
| 169 | break; |
| 170 | } |
| 171 | count = 3; |
| 172 | if (*p == 'M') { |
| 173 | p++; |
| 174 | if (isspace(*p) || (*p == 0)) { |
| 175 | result = 'M' & 037; |
| 176 | break; |
| 177 | } |
| 178 | count = 4; |
| 179 | result = (*p & 037) | 0200; |
| 180 | break; |
| 181 | } |
| 182 | count = 3; |
| 183 | result = *p & 037; |
| 184 | break; |
| 185 | case 'M': |
| 186 | p++; |
| 187 | if (isspace(*p) || (*p == 0)) { |
| 188 | result = 'M'; |
| 189 | count = 1; |
| 190 | break; |
| 191 | } |
| 192 | count = 3; |
| 193 | result = *p + 0200; |
| 194 | break; |
| 195 | case '}': |
| 196 | case '{': |
| 197 | case ']': |
| 198 | case '[': |
| 199 | case '$': |
| 200 | case ' ': |
| 201 | case ';': |
| 202 | case '"': |
| 203 | case '\\': |
| 204 | result = *p; |
| 205 | break; |
| 206 | case '\n': |
| 207 | result = 0; |
| 208 | break; |
| 209 | default: |
| 210 | if (isdigit(*p)) { |
| 211 | result = *p - '0'; |
| 212 | p++; |
| 213 | if (!isdigit(*p)) { |
| 214 | break; |
| 215 | } |
| 216 | count = 3; |
| 217 | result = (result << 3) + (*p - '0'); |
| 218 | p++; |
| 219 | if (!isdigit(*p)) { |
| 220 | break; |
| 221 | } |
| 222 | count = 4; |
| 223 | result = (result << 3) + (*p - '0'); |
| 224 | break; |
| 225 | } |
| 226 | result = '\\'; |
| 227 | count = 1; |
| 228 | break; |
| 229 | } |
| 230 | |
| 231 | if (readPtr != NULL) { |
| 232 | *readPtr = count; |
| 233 | } |
| 234 | return result; |
| 235 | } |
| 236 | \f |
| 237 | /* |
| 238 | *-------------------------------------------------------------- |
| 239 | * |
| 240 | * TclParseQuotes -- |
| 241 | * |
| 242 | * This procedure parses a double-quoted string such as a |
| 243 | * quoted Tcl command argument or a quoted value in a Tcl |
| 244 | * expression. This procedure is also used to parse array |
| 245 | * element names within parentheses, or anything else that |
| 246 | * needs all the substitutions that happen in quotes. |
| 247 | * |
| 248 | * Results: |
| 249 | * The return value is a standard Tcl result, which is |
| 250 | * TCL_OK unless there was an error while parsing the |
| 251 | * quoted string. If an error occurs then interp->result |
| 252 | * contains a standard error message. *TermPtr is filled |
| 253 | * in with the address of the character just after the |
| 254 | * last one successfully processed; this is usually the |
| 255 | * character just after the matching close-quote. The |
| 256 | * fully-substituted contents of the quotes are stored in |
| 257 | * standard fashion in *pvPtr, null-terminated with |
| 258 | * pvPtr->next pointing to the terminating null character. |
| 259 | * |
| 260 | * Side effects: |
| 261 | * The buffer space in pvPtr may be enlarged by calling its |
| 262 | * expandProc. |
| 263 | * |
| 264 | *-------------------------------------------------------------- |
| 265 | */ |
| 266 | |
| 267 | int |
| 268 | TclParseQuotes(interp, string, termChar, flags, termPtr, pvPtr) |
| 269 | Tcl_Interp *interp; /* Interpreter to use for nested command |
| 270 | * evaluations and error messages. */ |
| 271 | char *string; /* Character just after opening double- |
| 272 | * quote. */ |
| 273 | int termChar; /* Character that terminates "quoted" string |
| 274 | * (usually double-quote, but sometimes |
| 275 | * right-paren or something else). */ |
| 276 | int flags; /* Flags to pass to nested Tcl_Eval calls. */ |
| 277 | char **termPtr; /* Store address of terminating character |
| 278 | * here. */ |
| 279 | ParseValue *pvPtr; /* Information about where to place |
| 280 | * fully-substituted result of parse. */ |
| 281 | { |
| 282 | register char *src, *dst, c; |
| 283 | |
| 284 | src = string; |
| 285 | dst = pvPtr->next; |
| 286 | |
| 287 | while (1) { |
| 288 | if (dst == pvPtr->end) { |
| 289 | /* |
| 290 | * Target buffer space is about to run out. Make more space. |
| 291 | */ |
| 292 | |
| 293 | pvPtr->next = dst; |
| 294 | (*pvPtr->expandProc)(pvPtr, 1); |
| 295 | dst = pvPtr->next; |
| 296 | } |
| 297 | |
| 298 | c = *src; |
| 299 | src++; |
| 300 | if (c == termChar) { |
| 301 | *dst = '\0'; |
| 302 | pvPtr->next = dst; |
| 303 | *termPtr = src; |
| 304 | return TCL_OK; |
| 305 | } else if (CHAR_TYPE(c) == TCL_NORMAL) { |
| 306 | copy: |
| 307 | *dst = c; |
| 308 | dst++; |
| 309 | continue; |
| 310 | } else if (c == '$') { |
| 311 | int length; |
| 312 | char *value; |
| 313 | |
| 314 | value = Tcl_ParseVar(interp, src-1, termPtr); |
| 315 | if (value == NULL) { |
| 316 | return TCL_ERROR; |
| 317 | } |
| 318 | src = *termPtr; |
| 319 | length = strlen(value); |
| 320 | if ((pvPtr->end - dst) <= length) { |
| 321 | pvPtr->next = dst; |
| 322 | (*pvPtr->expandProc)(pvPtr, length); |
| 323 | dst = pvPtr->next; |
| 324 | } |
| 325 | strcpy(dst, value); |
| 326 | dst += length; |
| 327 | continue; |
| 328 | } else if (c == '[') { |
| 329 | int result; |
| 330 | |
| 331 | pvPtr->next = dst; |
| 332 | result = TclParseNestedCmd(interp, src, flags, termPtr, pvPtr); |
| 333 | if (result != TCL_OK) { |
| 334 | return result; |
| 335 | } |
| 336 | src = *termPtr; |
| 337 | dst = pvPtr->next; |
| 338 | continue; |
| 339 | } else if (c == '\\') { |
| 340 | int numRead; |
| 341 | |
| 342 | src--; |
| 343 | *dst = Tcl_Backslash(src, &numRead); |
| 344 | if (*dst != 0) { |
| 345 | dst++; |
| 346 | } |
| 347 | src += numRead; |
| 348 | continue; |
| 349 | } else if (c == '\0') { |
| 350 | Tcl_ResetResult(interp); |
| 351 | sprintf(interp->result, "missing %c", termChar); |
| 352 | *termPtr = string-1; |
| 353 | return TCL_ERROR; |
| 354 | } else { |
| 355 | goto copy; |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | \f |
| 360 | /* |
| 361 | *-------------------------------------------------------------- |
| 362 | * |
| 363 | * TclParseNestedCmd -- |
| 364 | * |
| 365 | * This procedure parses a nested Tcl command between |
| 366 | * brackets, returning the result of the command. |
| 367 | * |
| 368 | * Results: |
| 369 | * The return value is a standard Tcl result, which is |
| 370 | * TCL_OK unless there was an error while executing the |
| 371 | * nested command. If an error occurs then interp->result |
| 372 | * contains a standard error message. *TermPtr is filled |
| 373 | * in with the address of the character just after the |
| 374 | * last one processed; this is usually the character just |
| 375 | * after the matching close-bracket, or the null character |
| 376 | * at the end of the string if the close-bracket was missing |
| 377 | * (a missing close bracket is an error). The result returned |
| 378 | * by the command is stored in standard fashion in *pvPtr, |
| 379 | * null-terminated, with pvPtr->next pointing to the null |
| 380 | * character. |
| 381 | * |
| 382 | * Side effects: |
| 383 | * The storage space at *pvPtr may be expanded. |
| 384 | * |
| 385 | *-------------------------------------------------------------- |
| 386 | */ |
| 387 | |
| 388 | int |
| 389 | TclParseNestedCmd(interp, string, flags, termPtr, pvPtr) |
| 390 | Tcl_Interp *interp; /* Interpreter to use for nested command |
| 391 | * evaluations and error messages. */ |
| 392 | char *string; /* Character just after opening bracket. */ |
| 393 | int flags; /* Flags to pass to nested Tcl_Eval. */ |
| 394 | char **termPtr; /* Store address of terminating character |
| 395 | * here. */ |
| 396 | register ParseValue *pvPtr; /* Information about where to place |
| 397 | * result of command. */ |
| 398 | { |
| 399 | int result, length, shortfall; |
| 400 | Interp *iPtr = (Interp *) interp; |
| 401 | |
| 402 | result = Tcl_Eval(interp, string, flags | TCL_BRACKET_TERM, termPtr); |
| 403 | if (result != TCL_OK) { |
| 404 | /* |
| 405 | * The increment below results in slightly cleaner message in |
| 406 | * the errorInfo variable (the close-bracket will appear). |
| 407 | */ |
| 408 | |
| 409 | if (**termPtr == ']') { |
| 410 | *termPtr += 1; |
| 411 | } |
| 412 | return result; |
| 413 | } |
| 414 | (*termPtr) += 1; |
| 415 | length = strlen(iPtr->result); |
| 416 | shortfall = length + 1 - (pvPtr->end - pvPtr->next); |
| 417 | if (shortfall > 0) { |
| 418 | (*pvPtr->expandProc)(pvPtr, shortfall); |
| 419 | } |
| 420 | strcpy(pvPtr->next, iPtr->result); |
| 421 | pvPtr->next += length; |
| 422 | Tcl_FreeResult(iPtr); |
| 423 | iPtr->result = iPtr->resultSpace; |
| 424 | iPtr->resultSpace[0] = '\0'; |
| 425 | return TCL_OK; |
| 426 | } |
| 427 | \f |
| 428 | /* |
| 429 | *-------------------------------------------------------------- |
| 430 | * |
| 431 | * TclParseBraces -- |
| 432 | * |
| 433 | * This procedure scans the information between matching |
| 434 | * curly braces. |
| 435 | * |
| 436 | * Results: |
| 437 | * The return value is a standard Tcl result, which is |
| 438 | * TCL_OK unless there was an error while parsing string. |
| 439 | * If an error occurs then interp->result contains a |
| 440 | * standard error message. *TermPtr is filled |
| 441 | * in with the address of the character just after the |
| 442 | * last one successfully processed; this is usually the |
| 443 | * character just after the matching close-brace. The |
| 444 | * information between curly braces is stored in standard |
| 445 | * fashion in *pvPtr, null-terminated with pvPtr->next |
| 446 | * pointing to the terminating null character. |
| 447 | * |
| 448 | * Side effects: |
| 449 | * The storage space at *pvPtr may be expanded. |
| 450 | * |
| 451 | *-------------------------------------------------------------- |
| 452 | */ |
| 453 | |
| 454 | int |
| 455 | TclParseBraces(interp, string, termPtr, pvPtr) |
| 456 | Tcl_Interp *interp; /* Interpreter to use for nested command |
| 457 | * evaluations and error messages. */ |
| 458 | char *string; /* Character just after opening bracket. */ |
| 459 | char **termPtr; /* Store address of terminating character |
| 460 | * here. */ |
| 461 | register ParseValue *pvPtr; /* Information about where to place |
| 462 | * result of command. */ |
| 463 | { |
| 464 | int level; |
| 465 | register char *src, *dst, *end; |
| 466 | register char c; |
| 467 | |
| 468 | src = string; |
| 469 | dst = pvPtr->next; |
| 470 | end = pvPtr->end; |
| 471 | level = 1; |
| 472 | |
| 473 | /* |
| 474 | * Copy the characters one at a time to the result area, stopping |
| 475 | * when the matching close-brace is found. |
| 476 | */ |
| 477 | |
| 478 | while (1) { |
| 479 | c = *src; |
| 480 | src++; |
| 481 | if (dst == end) { |
| 482 | pvPtr->next = dst; |
| 483 | (*pvPtr->expandProc)(pvPtr, 20); |
| 484 | dst = pvPtr->next; |
| 485 | end = pvPtr->end; |
| 486 | } |
| 487 | *dst = c; |
| 488 | dst++; |
| 489 | if (CHAR_TYPE(c) == TCL_NORMAL) { |
| 490 | continue; |
| 491 | } else if (c == '{') { |
| 492 | level++; |
| 493 | } else if (c == '}') { |
| 494 | level--; |
| 495 | if (level == 0) { |
| 496 | dst--; /* Don't copy the last close brace. */ |
| 497 | break; |
| 498 | } |
| 499 | } else if (c == '\\') { |
| 500 | int count; |
| 501 | |
| 502 | /* |
| 503 | * Must always squish out backslash-newlines, even when in |
| 504 | * braces. This is needed so that this sequence can appear |
| 505 | * anywhere in a command, such as the middle of an expression. |
| 506 | */ |
| 507 | |
| 508 | if (*src == '\n') { |
| 509 | dst--; |
| 510 | src++; |
| 511 | } else { |
| 512 | (void) Tcl_Backslash(src-1, &count); |
| 513 | while (count > 1) { |
| 514 | if (dst == end) { |
| 515 | pvPtr->next = dst; |
| 516 | (*pvPtr->expandProc)(pvPtr, 20); |
| 517 | dst = pvPtr->next; |
| 518 | end = pvPtr->end; |
| 519 | } |
| 520 | *dst = *src; |
| 521 | dst++; |
| 522 | src++; |
| 523 | count--; |
| 524 | } |
| 525 | } |
| 526 | } else if (c == '\0') { |
| 527 | Tcl_SetResult(interp, "missing close-brace", TCL_STATIC); |
| 528 | *termPtr = string-1; |
| 529 | return TCL_ERROR; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | *dst = '\0'; |
| 534 | pvPtr->next = dst; |
| 535 | *termPtr = src; |
| 536 | return TCL_OK; |
| 537 | } |
| 538 | \f |
| 539 | /* |
| 540 | *-------------------------------------------------------------- |
| 541 | * |
| 542 | * TclParseWords -- |
| 543 | * |
| 544 | * This procedure parses one or more words from a command |
| 545 | * string and creates argv-style pointers to fully-substituted |
| 546 | * copies of those words. |
| 547 | * |
| 548 | * Results: |
| 549 | * The return value is a standard Tcl result. |
| 550 | * |
| 551 | * *argcPtr is modified to hold a count of the number of words |
| 552 | * successfully parsed, which may be 0. At most maxWords words |
| 553 | * will be parsed. If 0 <= *argcPtr < maxWords then it |
| 554 | * means that a command separator was seen. If *argcPtr |
| 555 | * is maxWords then it means that a command separator was |
| 556 | * not seen yet. |
| 557 | * |
| 558 | * *TermPtr is filled in with the address of the character |
| 559 | * just after the last one successfully processed in the |
| 560 | * last word. This is either the command terminator (if |
| 561 | * *argcPtr < maxWords), the character just after the last |
| 562 | * one in a word (if *argcPtr is maxWords), or the vicinity |
| 563 | * of an error (if the result is not TCL_OK). |
| 564 | * |
| 565 | * The pointers at *argv are filled in with pointers to the |
| 566 | * fully-substituted words, and the actual contents of the |
| 567 | * words are copied to the buffer at pvPtr. |
| 568 | * |
| 569 | * If an error occurrs then an error message is left in |
| 570 | * interp->result and the information at *argv, *argcPtr, |
| 571 | * and *pvPtr may be incomplete. |
| 572 | * |
| 573 | * Side effects: |
| 574 | * The buffer space in pvPtr may be enlarged by calling its |
| 575 | * expandProc. |
| 576 | * |
| 577 | *-------------------------------------------------------------- |
| 578 | */ |
| 579 | |
| 580 | int |
| 581 | TclParseWords(interp, string, flags, maxWords, termPtr, argcPtr, argv, pvPtr) |
| 582 | Tcl_Interp *interp; /* Interpreter to use for nested command |
| 583 | * evaluations and error messages. */ |
| 584 | char *string; /* First character of word. */ |
| 585 | int flags; /* Flags to control parsing (same values as |
| 586 | * passed to Tcl_Eval). */ |
| 587 | int maxWords; /* Maximum number of words to parse. */ |
| 588 | char **termPtr; /* Store address of terminating character |
| 589 | * here. */ |
| 590 | int *argcPtr; /* Filled in with actual number of words |
| 591 | * parsed. */ |
| 592 | char **argv; /* Store addresses of individual words here. */ |
| 593 | register ParseValue *pvPtr; /* Information about where to place |
| 594 | * fully-substituted word. */ |
| 595 | { |
| 596 | register char *src, *dst; |
| 597 | register char c; |
| 598 | int type, result, argc; |
| 599 | char *oldBuffer; /* Used to detect when pvPtr's buffer gets |
| 600 | * reallocated, so we can adjust all of the |
| 601 | * argv pointers. */ |
| 602 | |
| 603 | src = string; |
| 604 | oldBuffer = pvPtr->buffer; |
| 605 | dst = pvPtr->next; |
| 606 | for (argc = 0; argc < maxWords; argc++) { |
| 607 | argv[argc] = dst; |
| 608 | |
| 609 | /* |
| 610 | * Skip leading space. |
| 611 | */ |
| 612 | |
| 613 | skipSpace: |
| 614 | c = *src; |
| 615 | type = CHAR_TYPE(c); |
| 616 | while (type == TCL_SPACE) { |
| 617 | src++; |
| 618 | c = *src; |
| 619 | type = CHAR_TYPE(c); |
| 620 | } |
| 621 | |
| 622 | /* |
| 623 | * Handle the normal case (i.e. no leading double-quote or brace). |
| 624 | */ |
| 625 | |
| 626 | if (type == TCL_NORMAL) { |
| 627 | normalArg: |
| 628 | while (1) { |
| 629 | if (dst == pvPtr->end) { |
| 630 | /* |
| 631 | * Target buffer space is about to run out. Make |
| 632 | * more space. |
| 633 | */ |
| 634 | |
| 635 | pvPtr->next = dst; |
| 636 | (*pvPtr->expandProc)(pvPtr, 1); |
| 637 | dst = pvPtr->next; |
| 638 | } |
| 639 | |
| 640 | if (type == TCL_NORMAL) { |
| 641 | copy: |
| 642 | *dst = c; |
| 643 | dst++; |
| 644 | src++; |
| 645 | } else if (type == TCL_SPACE) { |
| 646 | goto wordEnd; |
| 647 | } else if (type == TCL_DOLLAR) { |
| 648 | int length; |
| 649 | char *value; |
| 650 | |
| 651 | value = Tcl_ParseVar(interp, src, termPtr); |
| 652 | if (value == NULL) { |
| 653 | return TCL_ERROR; |
| 654 | } |
| 655 | src = *termPtr; |
| 656 | length = strlen(value); |
| 657 | if ((pvPtr->end - dst) <= length) { |
| 658 | pvPtr->next = dst; |
| 659 | (*pvPtr->expandProc)(pvPtr, length); |
| 660 | dst = pvPtr->next; |
| 661 | } |
| 662 | strcpy(dst, value); |
| 663 | dst += length; |
| 664 | } else if (type == TCL_COMMAND_END) { |
| 665 | if ((c == ']') && !(flags & TCL_BRACKET_TERM)) { |
| 666 | goto copy; |
| 667 | } |
| 668 | |
| 669 | /* |
| 670 | * End of command; simulate a word-end first, so |
| 671 | * that the end-of-command can be processed as the |
| 672 | * first thing in a new word. |
| 673 | */ |
| 674 | |
| 675 | goto wordEnd; |
| 676 | } else if (type == TCL_OPEN_BRACKET) { |
| 677 | pvPtr->next = dst; |
| 678 | result = TclParseNestedCmd(interp, src+1, flags, termPtr, |
| 679 | pvPtr); |
| 680 | if (result != TCL_OK) { |
| 681 | return result; |
| 682 | } |
| 683 | src = *termPtr; |
| 684 | dst = pvPtr->next; |
| 685 | } else if (type == TCL_BACKSLASH) { |
| 686 | int numRead; |
| 687 | |
| 688 | *dst = Tcl_Backslash(src, &numRead); |
| 689 | if (*dst != 0) { |
| 690 | dst++; |
| 691 | } |
| 692 | src += numRead; |
| 693 | } else { |
| 694 | goto copy; |
| 695 | } |
| 696 | c = *src; |
| 697 | type = CHAR_TYPE(c); |
| 698 | } |
| 699 | } else { |
| 700 | |
| 701 | /* |
| 702 | * Check for the end of the command. |
| 703 | */ |
| 704 | |
| 705 | if (type == TCL_COMMAND_END) { |
| 706 | if (flags & TCL_BRACKET_TERM) { |
| 707 | if (c == '\0') { |
| 708 | Tcl_SetResult(interp, "missing close-bracket", |
| 709 | TCL_STATIC); |
| 710 | return TCL_ERROR; |
| 711 | } |
| 712 | } else { |
| 713 | if (c == ']') { |
| 714 | goto normalArg; |
| 715 | } |
| 716 | } |
| 717 | goto done; |
| 718 | } |
| 719 | |
| 720 | /* |
| 721 | * Now handle the special cases: open braces, double-quotes, |
| 722 | * and backslash-newline. |
| 723 | */ |
| 724 | |
| 725 | pvPtr->next = dst; |
| 726 | if (type == TCL_QUOTE) { |
| 727 | result = TclParseQuotes(interp, src+1, '"', flags, |
| 728 | termPtr, pvPtr); |
| 729 | } else if (type == TCL_OPEN_BRACE) { |
| 730 | result = TclParseBraces(interp, src+1, termPtr, pvPtr); |
| 731 | } else if ((type == TCL_BACKSLASH) && (src[1] == '\n')) { |
| 732 | src += 2; |
| 733 | goto skipSpace; |
| 734 | } else { |
| 735 | goto normalArg; |
| 736 | } |
| 737 | if (result != TCL_OK) { |
| 738 | return result; |
| 739 | } |
| 740 | |
| 741 | /* |
| 742 | * Back from quotes or braces; make sure that the terminating |
| 743 | * character was the end of the word. Have to be careful here |
| 744 | * to handle continuation lines (i.e. lines ending in backslash). |
| 745 | */ |
| 746 | |
| 747 | c = **termPtr; |
| 748 | if ((c == '\\') && ((*termPtr)[1] == '\n')) { |
| 749 | c = (*termPtr)[2]; |
| 750 | } |
| 751 | type = CHAR_TYPE(c); |
| 752 | if ((type != TCL_SPACE) && (type != TCL_COMMAND_END)) { |
| 753 | if (*src == '"') { |
| 754 | Tcl_SetResult(interp, "extra characters after close-quote", |
| 755 | TCL_STATIC); |
| 756 | } else { |
| 757 | Tcl_SetResult(interp, "extra characters after close-brace", |
| 758 | TCL_STATIC); |
| 759 | } |
| 760 | return TCL_ERROR; |
| 761 | } |
| 762 | src = *termPtr; |
| 763 | dst = pvPtr->next; |
| 764 | |
| 765 | } |
| 766 | |
| 767 | /* |
| 768 | * We're at the end of a word, so add a null terminator. Then |
| 769 | * see if the buffer was re-allocated during this word. If so, |
| 770 | * update all of the argv pointers. |
| 771 | */ |
| 772 | |
| 773 | wordEnd: |
| 774 | *dst = '\0'; |
| 775 | dst++; |
| 776 | if (oldBuffer != pvPtr->buffer) { |
| 777 | int i; |
| 778 | |
| 779 | for (i = 0; i <= argc; i++) { |
| 780 | argv[i] = pvPtr->buffer + (argv[i] - oldBuffer); |
| 781 | } |
| 782 | oldBuffer = pvPtr->buffer; |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | done: |
| 787 | pvPtr->next = dst; |
| 788 | *termPtr = src; |
| 789 | *argcPtr = argc; |
| 790 | return TCL_OK; |
| 791 | } |
| 792 | \f |
| 793 | /* |
| 794 | *-------------------------------------------------------------- |
| 795 | * |
| 796 | * TclExpandParseValue -- |
| 797 | * |
| 798 | * This procedure is commonly used as the value of the |
| 799 | * expandProc in a ParseValue. It uses malloc to allocate |
| 800 | * more space for the result of a parse. |
| 801 | * |
| 802 | * Results: |
| 803 | * The buffer space in *pvPtr is reallocated to something |
| 804 | * larger, and if pvPtr->clientData is non-zero the old |
| 805 | * buffer is freed. Information is copied from the old |
| 806 | * buffer to the new one. |
| 807 | * |
| 808 | * Side effects: |
| 809 | * None. |
| 810 | * |
| 811 | *-------------------------------------------------------------- |
| 812 | */ |
| 813 | |
| 814 | void |
| 815 | TclExpandParseValue(pvPtr, needed) |
| 816 | register ParseValue *pvPtr; /* Information about buffer that |
| 817 | * must be expanded. If the clientData |
| 818 | * in the structure is non-zero, it |
| 819 | * means that the current buffer is |
| 820 | * dynamically allocated. */ |
| 821 | int needed; /* Minimum amount of additional space |
| 822 | * to allocate. */ |
| 823 | { |
| 824 | int newSpace; |
| 825 | char *new; |
| 826 | |
| 827 | /* |
| 828 | * Either double the size of the buffer or add enough new space |
| 829 | * to meet the demand, whichever produces a larger new buffer. |
| 830 | */ |
| 831 | |
| 832 | newSpace = (pvPtr->end - pvPtr->buffer) + 1; |
| 833 | if (newSpace < needed) { |
| 834 | newSpace += needed; |
| 835 | } else { |
| 836 | newSpace += newSpace; |
| 837 | } |
| 838 | new = (char *) ckalloc((unsigned) newSpace); |
| 839 | |
| 840 | /* |
| 841 | * Copy from old buffer to new, free old buffer if needed, and |
| 842 | * mark new buffer as malloc-ed. |
| 843 | */ |
| 844 | |
| 845 | memcpy((VOID *) new, (VOID *) pvPtr->buffer, pvPtr->next - pvPtr->buffer); |
| 846 | pvPtr->next = new + (pvPtr->next - pvPtr->buffer); |
| 847 | if (pvPtr->clientData != 0) { |
| 848 | ckfree(pvPtr->buffer); |
| 849 | } |
| 850 | pvPtr->buffer = new; |
| 851 | pvPtr->end = new + newSpace - 1; |
| 852 | pvPtr->clientData = (ClientData) 1; |
| 853 | } |
| 854 | \f |
| 855 | /* |
| 856 | *---------------------------------------------------------------------- |
| 857 | * |
| 858 | * TclWordEnd -- |
| 859 | * |
| 860 | * Given a pointer into a Tcl command, find the end of the next |
| 861 | * word of the command. |
| 862 | * |
| 863 | * Results: |
| 864 | * The return value is a pointer to the character just after the |
| 865 | * last one that's part of the word pointed to by "start". This |
| 866 | * may be the address of the NULL character at the end of the |
| 867 | * string. |
| 868 | * |
| 869 | * Side effects: |
| 870 | * None. |
| 871 | * |
| 872 | *---------------------------------------------------------------------- |
| 873 | */ |
| 874 | |
| 875 | char * |
| 876 | TclWordEnd(start, nested) |
| 877 | char *start; /* Beginning of a word of a Tcl command. */ |
| 878 | int nested; /* Zero means this is a top-level command. |
| 879 | * One means this is a nested command (close |
| 880 | * brace is a word terminator). */ |
| 881 | { |
| 882 | register char *p; |
| 883 | int count; |
| 884 | |
| 885 | p = start; |
| 886 | while (isspace(*p)) { |
| 887 | p++; |
| 888 | } |
| 889 | |
| 890 | /* |
| 891 | * Handle words beginning with a double-quote or a brace. |
| 892 | */ |
| 893 | |
| 894 | if (*p == '"') { |
| 895 | p = QuoteEnd(p+1, '"'); |
| 896 | } else if (*p == '{') { |
| 897 | int braces = 1; |
| 898 | while (braces != 0) { |
| 899 | p++; |
| 900 | while (*p == '\\') { |
| 901 | (void) Tcl_Backslash(p, &count); |
| 902 | p += count; |
| 903 | } |
| 904 | if (*p == '}') { |
| 905 | braces--; |
| 906 | } else if (*p == '{') { |
| 907 | braces++; |
| 908 | } else if (*p == 0) { |
| 909 | return p; |
| 910 | } |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | /* |
| 915 | * Handle words that don't start with a brace or double-quote. |
| 916 | * This code is also invoked if the word starts with a brace or |
| 917 | * double-quote and there is garbage after the closing brace or |
| 918 | * quote. This is an error as far as Tcl_Eval is concerned, but |
| 919 | * for here the garbage is treated as part of the word. |
| 920 | */ |
| 921 | |
| 922 | while (*p != 0) { |
| 923 | if (*p == '[') { |
| 924 | p++; |
| 925 | while ((*p != ']') && (*p != 0)) { |
| 926 | p = TclWordEnd(p, 1); |
| 927 | } |
| 928 | if (*p == ']') { |
| 929 | p++; |
| 930 | } |
| 931 | } else if (*p == '\\') { |
| 932 | (void) Tcl_Backslash(p, &count); |
| 933 | p += count; |
| 934 | } else if (*p == '$') { |
| 935 | p = VarNameEnd(p); |
| 936 | } else if (*p == ';') { |
| 937 | /* |
| 938 | * Note: semi-colon terminates a word |
| 939 | * and also counts as a word by itself. |
| 940 | */ |
| 941 | |
| 942 | if (p == start) { |
| 943 | p++; |
| 944 | } |
| 945 | break; |
| 946 | } else if (isspace(*p)) { |
| 947 | break; |
| 948 | } else if ((*p == ']') && nested) { |
| 949 | break; |
| 950 | } else { |
| 951 | p++; |
| 952 | } |
| 953 | } |
| 954 | return p; |
| 955 | } |
| 956 | \f |
| 957 | /* |
| 958 | *---------------------------------------------------------------------- |
| 959 | * |
| 960 | * QuoteEnd -- |
| 961 | * |
| 962 | * Given a pointer to a string that obeys the parsing conventions |
| 963 | * for quoted things in Tcl, find the end of that quoted thing. |
| 964 | * The actual thing may be a quoted argument or a parenthesized |
| 965 | * index name. |
| 966 | * |
| 967 | * Results: |
| 968 | * The return value is a pointer to the character just after the |
| 969 | * last one that is part of the quoted string. |
| 970 | * |
| 971 | * Side effects: |
| 972 | * None. |
| 973 | * |
| 974 | *---------------------------------------------------------------------- |
| 975 | */ |
| 976 | |
| 977 | static char * |
| 978 | QuoteEnd(string, term) |
| 979 | char *string; /* Pointer to character just after opening |
| 980 | * "quote". */ |
| 981 | int term; /* This character will terminate the |
| 982 | * quoted string (e.g. '"' or ')'). */ |
| 983 | { |
| 984 | register char *p = string; |
| 985 | int count; |
| 986 | |
| 987 | while ((*p != 0) && (*p != term)) { |
| 988 | if (*p == '\\') { |
| 989 | (void) Tcl_Backslash(p, &count); |
| 990 | p += count; |
| 991 | } else if (*p == '[') { |
| 992 | p++; |
| 993 | while ((*p != ']') && (*p != 0)) { |
| 994 | p = TclWordEnd(p, 1); |
| 995 | } |
| 996 | if (*p == ']') { |
| 997 | p++; |
| 998 | } |
| 999 | } else if (*p == '$') { |
| 1000 | p = VarNameEnd(p); |
| 1001 | } else { |
| 1002 | p++; |
| 1003 | } |
| 1004 | } |
| 1005 | return p; |
| 1006 | } |
| 1007 | \f |
| 1008 | /* |
| 1009 | *---------------------------------------------------------------------- |
| 1010 | * |
| 1011 | * VarNameEnd -- |
| 1012 | * |
| 1013 | * Given a pointer to a variable reference using $-notation, find |
| 1014 | * the end of the variable name spec. |
| 1015 | * |
| 1016 | * Results: |
| 1017 | * The return value is a pointer to the character just after the |
| 1018 | * last one that is part of the variable name. |
| 1019 | * |
| 1020 | * Side effects: |
| 1021 | * None. |
| 1022 | * |
| 1023 | *---------------------------------------------------------------------- |
| 1024 | */ |
| 1025 | |
| 1026 | static char * |
| 1027 | VarNameEnd(string) |
| 1028 | char *string; /* Pointer to dollar-sign character. */ |
| 1029 | { |
| 1030 | register char *p = string+1; |
| 1031 | |
| 1032 | if (*p == '{') { |
| 1033 | do { |
| 1034 | p++; |
| 1035 | } while ((*p != '}') && (*p != 0)); |
| 1036 | } else { |
| 1037 | while (isalnum(*p) || (*p == '_')) { |
| 1038 | p++; |
| 1039 | } |
| 1040 | if ((*p == '(') && (p != string+1)) { |
| 1041 | p = QuoteEnd(p+1, ')'); |
| 1042 | } |
| 1043 | } |
| 1044 | return p; |
| 1045 | } |
| 1046 | \f |
| 1047 | /* |
| 1048 | *---------------------------------------------------------------------- |
| 1049 | * |
| 1050 | * Tcl_ParseVar -- |
| 1051 | * |
| 1052 | * Given a string starting with a $ sign, parse off a variable |
| 1053 | * name and return its value. |
| 1054 | * |
| 1055 | * Results: |
| 1056 | * The return value is the contents of the variable given by |
| 1057 | * the leading characters of string. If termPtr isn't NULL, |
| 1058 | * *termPtr gets filled in with the address of the character |
| 1059 | * just after the last one in the variable specifier. If the |
| 1060 | * variable doesn't exist, then the return value is NULL and |
| 1061 | * an error message will be left in interp->result. |
| 1062 | * |
| 1063 | * Side effects: |
| 1064 | * None. |
| 1065 | * |
| 1066 | *---------------------------------------------------------------------- |
| 1067 | */ |
| 1068 | |
| 1069 | char * |
| 1070 | Tcl_ParseVar(interp, string, termPtr) |
| 1071 | Tcl_Interp *interp; /* Context for looking up variable. */ |
| 1072 | register char *string; /* String containing variable name. |
| 1073 | * First character must be "$". */ |
| 1074 | char **termPtr; /* If non-NULL, points to word to fill |
| 1075 | * in with character just after last |
| 1076 | * one in the variable specifier. */ |
| 1077 | |
| 1078 | { |
| 1079 | char *name1, *name1End, c, *result; |
| 1080 | register char *name2; |
| 1081 | #define NUM_CHARS 200 |
| 1082 | char copyStorage[NUM_CHARS]; |
| 1083 | ParseValue pv; |
| 1084 | |
| 1085 | /* |
| 1086 | * There are three cases: |
| 1087 | * 1. The $ sign is followed by an open curly brace. Then the variable |
| 1088 | * name is everything up to the next close curly brace, and the |
| 1089 | * variable is a scalar variable. |
| 1090 | * 2. The $ sign is not followed by an open curly brace. Then the |
| 1091 | * variable name is everything up to the next character that isn't |
| 1092 | * a letter, digit, or underscore. If the following character is an |
| 1093 | * open parenthesis, then the information between parentheses is |
| 1094 | * the array element name, which can include any of the substitutions |
| 1095 | * permissible between quotes. |
| 1096 | * 3. The $ sign is followed by something that isn't a letter, digit, |
| 1097 | * or underscore: in this case, there is no variable name, and "$" |
| 1098 | * is returned. |
| 1099 | */ |
| 1100 | |
| 1101 | name2 = NULL; |
| 1102 | string++; |
| 1103 | if (*string == '{') { |
| 1104 | string++; |
| 1105 | name1 = string; |
| 1106 | while (*string != '}') { |
| 1107 | if (*string == 0) { |
| 1108 | Tcl_SetResult(interp, "missing close-brace for variable name", |
| 1109 | TCL_STATIC); |
| 1110 | if (termPtr != 0) { |
| 1111 | *termPtr = string; |
| 1112 | } |
| 1113 | return NULL; |
| 1114 | } |
| 1115 | string++; |
| 1116 | } |
| 1117 | name1End = string; |
| 1118 | string++; |
| 1119 | } else { |
| 1120 | name1 = string; |
| 1121 | while (isalnum(*string) || (*string == '_')) { |
| 1122 | string++; |
| 1123 | } |
| 1124 | if (string == name1) { |
| 1125 | if (termPtr != 0) { |
| 1126 | *termPtr = string; |
| 1127 | } |
| 1128 | return "$"; |
| 1129 | } |
| 1130 | name1End = string; |
| 1131 | if (*string == '(') { |
| 1132 | char *end; |
| 1133 | |
| 1134 | /* |
| 1135 | * Perform substitutions on the array element name, just as |
| 1136 | * is done for quotes. |
| 1137 | */ |
| 1138 | |
| 1139 | pv.buffer = pv.next = copyStorage; |
| 1140 | pv.end = copyStorage + NUM_CHARS - 1; |
| 1141 | pv.expandProc = TclExpandParseValue; |
| 1142 | pv.clientData = (ClientData) NULL; |
| 1143 | if (TclParseQuotes(interp, string+1, ')', 0, &end, &pv) |
| 1144 | != TCL_OK) { |
| 1145 | char msg[100]; |
| 1146 | sprintf(msg, "\n (parsing index for array \"%.*s\")", |
| 1147 | string-name1, name1); |
| 1148 | Tcl_AddErrorInfo(interp, msg); |
| 1149 | result = NULL; |
| 1150 | name2 = pv.buffer; |
| 1151 | if (termPtr != 0) { |
| 1152 | *termPtr = end; |
| 1153 | } |
| 1154 | goto done; |
| 1155 | } |
| 1156 | string = end; |
| 1157 | name2 = pv.buffer; |
| 1158 | } |
| 1159 | } |
| 1160 | if (termPtr != 0) { |
| 1161 | *termPtr = string; |
| 1162 | } |
| 1163 | |
| 1164 | c = *name1End; |
| 1165 | *name1End = 0; |
| 1166 | result = Tcl_GetVar2(interp, name1, name2, TCL_LEAVE_ERR_MSG); |
| 1167 | *name1End = c; |
| 1168 | |
| 1169 | done: |
| 1170 | if ((name2 != NULL) && (pv.buffer != copyStorage)) { |
| 1171 | ckfree(pv.buffer); |
| 1172 | } |
| 1173 | return result; |
| 1174 | } |