1 /* $NetBSD: tokenizer.c,v 1.29 2023/05/30 11:53:40 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Christos Zoulas of Cornell University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "config.h" 36 #if !defined(lint) && !defined(SCCSID) 37 #if 0 38 static char sccsid[] = "@(#)tokenizer.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 __RCSID("$NetBSD: tokenizer.c,v 1.29 2023/05/30 11:53:40 christos Exp $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 44 /* We build this file twice, once as NARROW, once as WIDE. */ 45 /* 46 * tokenize.c: Bourne shell like tokenizer 47 */ 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "histedit.h" 52 53 typedef enum { 54 Q_none, Q_single, Q_double, Q_one, Q_doubleone 55 } quote_t; 56 57 #define TOK_KEEP 1 58 #define TOK_EAT 2 59 60 #define WINCR 20 61 #define AINCR 10 62 63 #define IFS STR("\t \n") 64 65 #define tok_malloc(a) malloc(a) 66 #define tok_free(a) free(a) 67 #define tok_realloc(a, b) realloc(a, b) 68 69 #ifdef NARROWCHAR 70 #define Char char 71 #define FUN(prefix, rest) prefix ## _ ## rest 72 #define TYPE(type) type 73 #define STR(x) x 74 #define Strchr(s, c) strchr(s, c) 75 #define tok_strdup(s) strdup(s) 76 #else 77 #define Char wchar_t 78 #define FUN(prefix, rest) prefix ## _w ## rest 79 #define TYPE(type) type ## W 80 #define STR(x) L ## x 81 #define Strchr(s, c) wcschr(s, c) 82 #define tok_strdup(s) wcsdup(s) 83 #endif 84 85 struct TYPE(tokenizer) { 86 Char *ifs; /* In field separator */ 87 size_t argc, amax; /* Current and maximum number of args */ 88 const Char **argv; /* Argument list */ 89 Char *wptr, *wmax; /* Space and limit on the word buffer */ 90 Char *wstart; /* Beginning of next word */ 91 Char *wspace; /* Space of word buffer */ 92 quote_t quote; /* Quoting state */ 93 int flags; /* flags; */ 94 }; 95 96 97 static void FUN(tok,finish)(TYPE(Tokenizer) *); 98 99 100 /* FUN(tok,finish)(): 101 * Finish a word in the tokenizer. 102 */ 103 static void 104 FUN(tok,finish)(TYPE(Tokenizer) *tok) 105 { 106 107 *tok->wptr = '\0'; 108 if ((tok->flags & TOK_KEEP) || tok->wptr != tok->wstart) { 109 tok->argv[tok->argc++] = tok->wstart; 110 tok->argv[tok->argc] = NULL; 111 tok->wstart = ++tok->wptr; 112 } 113 tok->flags &= ~TOK_KEEP; 114 } 115 116 117 /* FUN(tok,init)(): 118 * Initialize the tokenizer 119 */ 120 TYPE(Tokenizer) * 121 FUN(tok,init)(const Char *ifs) 122 { 123 TYPE(Tokenizer) *tok = tok_malloc(sizeof(*tok)); 124 125 if (tok == NULL) 126 return NULL; 127 tok->ifs = tok_strdup(ifs ? ifs : IFS); 128 if (tok->ifs == NULL) { 129 tok_free(tok); 130 return NULL; 131 } 132 tok->argc = 0; 133 tok->amax = AINCR; 134 tok->argv = tok_malloc(sizeof(*tok->argv) * tok->amax); 135 if (tok->argv == NULL) { 136 tok_free(tok->ifs); 137 tok_free(tok); 138 return NULL; 139 } 140 tok->argv[0] = NULL; 141 tok->wspace = tok_malloc(WINCR * sizeof(*tok->wspace)); 142 if (tok->wspace == NULL) { 143 tok_free(tok->argv); 144 tok_free(tok->ifs); 145 tok_free(tok); 146 return NULL; 147 } 148 tok->wmax = tok->wspace + WINCR; 149 tok->wstart = tok->wspace; 150 tok->wptr = tok->wspace; 151 tok->flags = 0; 152 tok->quote = Q_none; 153 154 return tok; 155 } 156 157 158 /* FUN(tok,reset)(): 159 * Reset the tokenizer 160 */ 161 void 162 FUN(tok,reset)(TYPE(Tokenizer) *tok) 163 { 164 165 tok->argc = 0; 166 tok->wstart = tok->wspace; 167 tok->wptr = tok->wspace; 168 tok->flags = 0; 169 tok->quote = Q_none; 170 } 171 172 173 /* FUN(tok,end)(): 174 * Clean up 175 */ 176 void 177 FUN(tok,end)(TYPE(Tokenizer) *tok) 178 { 179 180 tok_free(tok->ifs); 181 tok_free(tok->wspace); 182 tok_free(tok->argv); 183 tok_free(tok); 184 } 185 186 187 188 /* FUN(tok,line)(): 189 * Bourne shell (sh(1)) like tokenizing 190 * Arguments: 191 * tok current tokenizer state (setup with FUN(tok,init)()) 192 * line line to parse 193 * Returns: 194 * -1 Internal error 195 * 3 Quoted return 196 * 2 Unmatched double quote 197 * 1 Unmatched single quote 198 * 0 Ok 199 * Modifies (if return value is 0): 200 * argc number of arguments 201 * argv argument array 202 * cursorc if !NULL, argv element containing cursor 203 * cursorv if !NULL, offset in argv[cursorc] of cursor 204 */ 205 int 206 FUN(tok,line)(TYPE(Tokenizer) *tok, const TYPE(LineInfo) *line, 207 int *argc, const Char ***argv, int *cursorc, int *cursoro) 208 { 209 const Char *ptr; 210 int cc, co; 211 212 cc = co = -1; 213 ptr = line->buffer; 214 for (ptr = line->buffer; ;ptr++) { 215 if (ptr >= line->lastchar) 216 ptr = STR(""); 217 if (ptr == line->cursor) { 218 cc = (int)tok->argc; 219 co = (int)(tok->wptr - tok->wstart); 220 } 221 switch (*ptr) { 222 case '\'': 223 tok->flags |= TOK_KEEP; 224 tok->flags &= ~TOK_EAT; 225 switch (tok->quote) { 226 case Q_none: 227 tok->quote = Q_single; /* Enter single quote 228 * mode */ 229 break; 230 231 case Q_single: /* Exit single quote mode */ 232 tok->quote = Q_none; 233 break; 234 235 case Q_one: /* Quote this ' */ 236 tok->quote = Q_none; 237 *tok->wptr++ = *ptr; 238 break; 239 240 case Q_double: /* Stay in double quote mode */ 241 *tok->wptr++ = *ptr; 242 break; 243 244 case Q_doubleone: /* Quote this ' */ 245 tok->quote = Q_double; 246 *tok->wptr++ = *ptr; 247 break; 248 249 default: 250 return -1; 251 } 252 break; 253 254 case '"': 255 tok->flags &= ~TOK_EAT; 256 tok->flags |= TOK_KEEP; 257 switch (tok->quote) { 258 case Q_none: /* Enter double quote mode */ 259 tok->quote = Q_double; 260 break; 261 262 case Q_double: /* Exit double quote mode */ 263 tok->quote = Q_none; 264 break; 265 266 case Q_one: /* Quote this " */ 267 tok->quote = Q_none; 268 *tok->wptr++ = *ptr; 269 break; 270 271 case Q_single: /* Stay in single quote mode */ 272 *tok->wptr++ = *ptr; 273 break; 274 275 case Q_doubleone: /* Quote this " */ 276 tok->quote = Q_double; 277 *tok->wptr++ = *ptr; 278 break; 279 280 default: 281 return -1; 282 } 283 break; 284 285 case '\\': 286 tok->flags |= TOK_KEEP; 287 tok->flags &= ~TOK_EAT; 288 switch (tok->quote) { 289 case Q_none: /* Quote next character */ 290 tok->quote = Q_one; 291 break; 292 293 case Q_double: /* Quote next character */ 294 tok->quote = Q_doubleone; 295 break; 296 297 case Q_one: /* Quote this, restore state */ 298 *tok->wptr++ = *ptr; 299 tok->quote = Q_none; 300 break; 301 302 case Q_single: /* Stay in single quote mode */ 303 *tok->wptr++ = *ptr; 304 break; 305 306 case Q_doubleone: /* Quote this \ */ 307 tok->quote = Q_double; 308 *tok->wptr++ = *ptr; 309 break; 310 311 default: 312 return -1; 313 } 314 break; 315 316 case '\n': 317 tok->flags &= ~TOK_EAT; 318 switch (tok->quote) { 319 case Q_none: 320 goto tok_line_outok; 321 322 case Q_single: 323 case Q_double: 324 *tok->wptr++ = *ptr; /* Add the return */ 325 break; 326 327 case Q_doubleone: /* Back to double, eat the '\n' */ 328 tok->flags |= TOK_EAT; 329 tok->quote = Q_double; 330 break; 331 332 case Q_one: /* No quote, more eat the '\n' */ 333 tok->flags |= TOK_EAT; 334 tok->quote = Q_none; 335 break; 336 337 default: 338 return 0; 339 } 340 break; 341 342 case '\0': 343 switch (tok->quote) { 344 case Q_none: 345 /* Finish word and return */ 346 if (tok->flags & TOK_EAT) { 347 tok->flags &= ~TOK_EAT; 348 return 3; 349 } 350 goto tok_line_outok; 351 352 case Q_single: 353 return 1; 354 355 case Q_double: 356 return 2; 357 358 case Q_doubleone: 359 tok->quote = Q_double; 360 *tok->wptr++ = *ptr; 361 break; 362 363 case Q_one: 364 tok->quote = Q_none; 365 *tok->wptr++ = *ptr; 366 break; 367 368 default: 369 return -1; 370 } 371 break; 372 373 default: 374 tok->flags &= ~TOK_EAT; 375 switch (tok->quote) { 376 case Q_none: 377 if (Strchr(tok->ifs, *ptr) != NULL) 378 FUN(tok,finish)(tok); 379 else 380 *tok->wptr++ = *ptr; 381 break; 382 383 case Q_single: 384 case Q_double: 385 *tok->wptr++ = *ptr; 386 break; 387 388 389 case Q_doubleone: 390 *tok->wptr++ = '\\'; 391 tok->quote = Q_double; 392 *tok->wptr++ = *ptr; 393 break; 394 395 case Q_one: 396 tok->quote = Q_none; 397 *tok->wptr++ = *ptr; 398 break; 399 400 default: 401 return -1; 402 403 } 404 break; 405 } 406 407 if (tok->wptr >= tok->wmax - 4) { 408 size_t size = (size_t)(tok->wmax - tok->wspace + WINCR); 409 Char *s = tok_realloc(tok->wspace, 410 size * sizeof(*s)); 411 if (s == NULL) 412 return -1; 413 414 if (s != tok->wspace) { 415 size_t i; 416 for (i = 0; i < tok->argc; i++) { 417 tok->argv[i] = 418 (tok->argv[i] - tok->wspace) + s; 419 } 420 tok->wptr = (tok->wptr - tok->wspace) + s; 421 tok->wstart = (tok->wstart - tok->wspace) + s; 422 tok->wspace = s; 423 } 424 tok->wmax = s + size; 425 } 426 if (tok->argc >= tok->amax - 4) { 427 const Char **p; 428 tok->amax += AINCR; 429 p = tok_realloc(tok->argv, tok->amax * sizeof(*p)); 430 if (p == NULL) { 431 tok->amax -= AINCR; 432 return -1; 433 } 434 tok->argv = p; 435 } 436 } 437 tok_line_outok: 438 if (cc == -1 && co == -1) { 439 cc = (int)tok->argc; 440 co = (int)(tok->wptr - tok->wstart); 441 } 442 if (cursorc != NULL) 443 *cursorc = cc; 444 if (cursoro != NULL) 445 *cursoro = co; 446 FUN(tok,finish)(tok); 447 *argv = tok->argv; 448 *argc = (int)tok->argc; 449 return 0; 450 } 451 452 /* FUN(tok,str)(): 453 * Simpler version of tok_line, taking a NUL terminated line 454 * and splitting into words, ignoring cursor state. 455 */ 456 int 457 FUN(tok,str)(TYPE(Tokenizer) *tok, const Char *line, int *argc, 458 const Char ***argv) 459 { 460 TYPE(LineInfo) li; 461 462 memset(&li, 0, sizeof(li)); 463 li.buffer = line; 464 li.cursor = li.lastchar = Strchr(line, '\0'); 465 return FUN(tok,line)(tok, &li, argc, argv, NULL, NULL); 466 } 467
Indexes created Sat Sep 20 22:09:52 GMT 2025