| File: | src/lib/libedit/tokenizer.c |
| Warning: | line 203, column 2 Value stored to 'ptr' is never read |
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| 1 | /* $OpenBSD: tokenizer.c,v 1.21 2016/04/11 21:17:29 schwarze Exp $ */ |
| 2 | /* $NetBSD: tokenizer.c,v 1.28 2016/04/11 18:56:31 christos Exp $ */ |
| 3 | |
| 4 | /*- |
| 5 | * Copyright (c) 1992, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to Berkeley by |
| 9 | * Christos Zoulas of Cornell University. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | #include "config.h" |
| 37 | |
| 38 | /* We build this file twice, once as NARROW, once as WIDE. */ |
| 39 | /* |
| 40 | * tokenize.c: Bourne shell like tokenizer |
| 41 | */ |
| 42 | #include <stdlib.h> |
| 43 | #include <string.h> |
| 44 | |
| 45 | #include "histedit.h" |
| 46 | |
| 47 | typedef enum { |
| 48 | Q_none, Q_single, Q_double, Q_one, Q_doubleone |
| 49 | } quote_t; |
| 50 | |
| 51 | #define TOK_KEEP1 1 |
| 52 | #define TOK_EAT2 2 |
| 53 | |
| 54 | #define WINCR20 20 |
| 55 | #define AINCR10 10 |
| 56 | |
| 57 | #define IFSL"\t \n" STR("\t \n")L"\t \n" |
| 58 | |
| 59 | #ifdef NARROWCHAR |
| 60 | #define Charwchar_t char |
| 61 | #define FUN(prefix, rest)prefix_wrest prefix ## _ ## rest |
| 62 | #define TYPE(type)typeW type |
| 63 | #define STR(x)Lx x |
| 64 | #define Strchr(s, c)wcschr(s, c) strchr(s, c) |
| 65 | #define tok_strdup(s)wcsdup(s) strdup(s) |
| 66 | #else |
| 67 | #define Charwchar_t wchar_t |
| 68 | #define FUN(prefix, rest)prefix_wrest prefix ## _w ## rest |
| 69 | #define TYPE(type)typeW type ## W |
| 70 | #define STR(x)Lx L ## x |
| 71 | #define Strchr(s, c)wcschr(s, c) wcschr(s, c) |
| 72 | #define tok_strdup(s)wcsdup(s) wcsdup(s) |
| 73 | #endif |
| 74 | |
| 75 | struct TYPE(tokenizer)tokenizerW { |
| 76 | Charwchar_t *ifs; /* In field separator */ |
| 77 | int argc, amax; /* Current and maximum number of args */ |
| 78 | Charwchar_t **argv; /* Argument list */ |
| 79 | Charwchar_t *wptr, *wmax; /* Space and limit on the word buffer */ |
| 80 | Charwchar_t *wstart; /* Beginning of next word */ |
| 81 | Charwchar_t *wspace; /* Space of word buffer */ |
| 82 | quote_t quote; /* Quoting state */ |
| 83 | int flags; /* flags; */ |
| 84 | }; |
| 85 | |
| 86 | |
| 87 | static void FUN(tok,finish)tok_wfinish(TYPE(Tokenizer)TokenizerW *); |
| 88 | |
| 89 | |
| 90 | /* FUN(tok,finish)(): |
| 91 | * Finish a word in the tokenizer. |
| 92 | */ |
| 93 | static void |
| 94 | FUN(tok,finish)tok_wfinish(TYPE(Tokenizer)TokenizerW *tok) |
| 95 | { |
| 96 | |
| 97 | *tok->wptr = '\0'; |
| 98 | if ((tok->flags & TOK_KEEP1) || tok->wptr != tok->wstart) { |
| 99 | tok->argv[tok->argc++] = tok->wstart; |
| 100 | tok->argv[tok->argc] = NULL((void *)0); |
| 101 | tok->wstart = ++tok->wptr; |
| 102 | } |
| 103 | tok->flags &= ~TOK_KEEP1; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | /* FUN(tok,init)(): |
| 108 | * Initialize the tokenizer |
| 109 | */ |
| 110 | TYPE(Tokenizer)TokenizerW * |
| 111 | FUN(tok,init)tok_winit(const Charwchar_t *ifs) |
| 112 | { |
| 113 | TYPE(Tokenizer)TokenizerW *tok = malloc(sizeof(TYPE(Tokenizer)TokenizerW)); |
| 114 | |
| 115 | if (tok == NULL((void *)0)) |
| 116 | return NULL((void *)0); |
| 117 | tok->ifs = tok_strdup(ifs ? ifs : IFS)wcsdup(ifs ? ifs : L"\t \n"); |
| 118 | if (tok->ifs == NULL((void *)0)) { |
| 119 | free(tok); |
| 120 | return NULL((void *)0); |
| 121 | } |
| 122 | tok->argc = 0; |
| 123 | tok->amax = AINCR10; |
| 124 | tok->argv = reallocarray(NULL((void *)0), tok->amax, sizeof(*tok->argv)); |
| 125 | if (tok->argv == NULL((void *)0)) { |
| 126 | free(tok->ifs); |
| 127 | free(tok); |
| 128 | return NULL((void *)0); |
| 129 | } |
| 130 | tok->argv[0] = NULL((void *)0); |
| 131 | tok->wspace = reallocarray(NULL((void *)0), WINCR20, sizeof(*tok->wspace)); |
| 132 | if (tok->wspace == NULL((void *)0)) { |
| 133 | free(tok->argv); |
| 134 | free(tok->ifs); |
| 135 | free(tok); |
| 136 | return NULL((void *)0); |
| 137 | } |
| 138 | tok->wmax = tok->wspace + WINCR20; |
| 139 | tok->wstart = tok->wspace; |
| 140 | tok->wptr = tok->wspace; |
| 141 | tok->flags = 0; |
| 142 | tok->quote = Q_none; |
| 143 | |
| 144 | return tok; |
| 145 | } |
| 146 | |
| 147 | |
| 148 | /* FUN(tok,reset)(): |
| 149 | * Reset the tokenizer |
| 150 | */ |
| 151 | void |
| 152 | FUN(tok,reset)tok_wreset(TYPE(Tokenizer)TokenizerW *tok) |
| 153 | { |
| 154 | |
| 155 | tok->argc = 0; |
| 156 | tok->wstart = tok->wspace; |
| 157 | tok->wptr = tok->wspace; |
| 158 | tok->flags = 0; |
| 159 | tok->quote = Q_none; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /* FUN(tok,end)(): |
| 164 | * Clean up |
| 165 | */ |
| 166 | void |
| 167 | FUN(tok,end)tok_wend(TYPE(Tokenizer)TokenizerW *tok) |
| 168 | { |
| 169 | |
| 170 | free(tok->ifs); |
| 171 | free(tok->wspace); |
| 172 | free(tok->argv); |
| 173 | free(tok); |
| 174 | } |
| 175 | |
| 176 | |
| 177 | |
| 178 | /* FUN(tok,line)(): |
| 179 | * Bourne shell (sh(1)) like tokenizing |
| 180 | * Arguments: |
| 181 | * tok current tokenizer state (setup with FUN(tok,init)()) |
| 182 | * line line to parse |
| 183 | * Returns: |
| 184 | * -1 Internal error |
| 185 | * 3 Quoted return |
| 186 | * 2 Unmatched double quote |
| 187 | * 1 Unmatched single quote |
| 188 | * 0 Ok |
| 189 | * Modifies (if return value is 0): |
| 190 | * argc number of arguments |
| 191 | * argv argument array |
| 192 | * cursorc if !NULL, argv element containing cursor |
| 193 | * cursorv if !NULL, offset in argv[cursorc] of cursor |
| 194 | */ |
| 195 | int |
| 196 | FUN(tok,line)tok_wline(TYPE(Tokenizer)TokenizerW *tok, const TYPE(LineInfo)LineInfoW *line, |
| 197 | int *argc, const Charwchar_t ***argv, int *cursorc, int *cursoro) |
| 198 | { |
| 199 | const Charwchar_t *ptr; |
| 200 | int cc, co; |
| 201 | |
| 202 | cc = co = -1; |
| 203 | ptr = line->buffer; |
Value stored to 'ptr' is never read | |
| 204 | for (ptr = line->buffer; ;ptr++) { |
| 205 | if (ptr >= line->lastchar) |
| 206 | ptr = STR("")L""; |
| 207 | if (ptr == line->cursor) { |
| 208 | cc = tok->argc; |
| 209 | co = (int)(tok->wptr - tok->wstart); |
| 210 | } |
| 211 | switch (*ptr) { |
| 212 | case '\'': |
| 213 | tok->flags |= TOK_KEEP1; |
| 214 | tok->flags &= ~TOK_EAT2; |
| 215 | switch (tok->quote) { |
| 216 | case Q_none: |
| 217 | tok->quote = Q_single; /* Enter single quote |
| 218 | * mode */ |
| 219 | break; |
| 220 | |
| 221 | case Q_single: /* Exit single quote mode */ |
| 222 | tok->quote = Q_none; |
| 223 | break; |
| 224 | |
| 225 | case Q_one: /* Quote this ' */ |
| 226 | tok->quote = Q_none; |
| 227 | *tok->wptr++ = *ptr; |
| 228 | break; |
| 229 | |
| 230 | case Q_double: /* Stay in double quote mode */ |
| 231 | *tok->wptr++ = *ptr; |
| 232 | break; |
| 233 | |
| 234 | case Q_doubleone: /* Quote this ' */ |
| 235 | tok->quote = Q_double; |
| 236 | *tok->wptr++ = *ptr; |
| 237 | break; |
| 238 | |
| 239 | default: |
| 240 | return -1; |
| 241 | } |
| 242 | break; |
| 243 | |
| 244 | case '"': |
| 245 | tok->flags &= ~TOK_EAT2; |
| 246 | tok->flags |= TOK_KEEP1; |
| 247 | switch (tok->quote) { |
| 248 | case Q_none: /* Enter double quote mode */ |
| 249 | tok->quote = Q_double; |
| 250 | break; |
| 251 | |
| 252 | case Q_double: /* Exit double quote mode */ |
| 253 | tok->quote = Q_none; |
| 254 | break; |
| 255 | |
| 256 | case Q_one: /* Quote this " */ |
| 257 | tok->quote = Q_none; |
| 258 | *tok->wptr++ = *ptr; |
| 259 | break; |
| 260 | |
| 261 | case Q_single: /* Stay in single quote mode */ |
| 262 | *tok->wptr++ = *ptr; |
| 263 | break; |
| 264 | |
| 265 | case Q_doubleone: /* Quote this " */ |
| 266 | tok->quote = Q_double; |
| 267 | *tok->wptr++ = *ptr; |
| 268 | break; |
| 269 | |
| 270 | default: |
| 271 | return -1; |
| 272 | } |
| 273 | break; |
| 274 | |
| 275 | case '\\': |
| 276 | tok->flags |= TOK_KEEP1; |
| 277 | tok->flags &= ~TOK_EAT2; |
| 278 | switch (tok->quote) { |
| 279 | case Q_none: /* Quote next character */ |
| 280 | tok->quote = Q_one; |
| 281 | break; |
| 282 | |
| 283 | case Q_double: /* Quote next character */ |
| 284 | tok->quote = Q_doubleone; |
| 285 | break; |
| 286 | |
| 287 | case Q_one: /* Quote this, restore state */ |
| 288 | *tok->wptr++ = *ptr; |
| 289 | tok->quote = Q_none; |
| 290 | break; |
| 291 | |
| 292 | case Q_single: /* Stay in single quote mode */ |
| 293 | *tok->wptr++ = *ptr; |
| 294 | break; |
| 295 | |
| 296 | case Q_doubleone: /* Quote this \ */ |
| 297 | tok->quote = Q_double; |
| 298 | *tok->wptr++ = *ptr; |
| 299 | break; |
| 300 | |
| 301 | default: |
| 302 | return -1; |
| 303 | } |
| 304 | break; |
| 305 | |
| 306 | case '\n': |
| 307 | tok->flags &= ~TOK_EAT2; |
| 308 | switch (tok->quote) { |
| 309 | case Q_none: |
| 310 | goto tok_line_outok; |
| 311 | |
| 312 | case Q_single: |
| 313 | case Q_double: |
| 314 | *tok->wptr++ = *ptr; /* Add the return */ |
| 315 | break; |
| 316 | |
| 317 | case Q_doubleone: /* Back to double, eat the '\n' */ |
| 318 | tok->flags |= TOK_EAT2; |
| 319 | tok->quote = Q_double; |
| 320 | break; |
| 321 | |
| 322 | case Q_one: /* No quote, more eat the '\n' */ |
| 323 | tok->flags |= TOK_EAT2; |
| 324 | tok->quote = Q_none; |
| 325 | break; |
| 326 | |
| 327 | default: |
| 328 | return 0; |
| 329 | } |
| 330 | break; |
| 331 | |
| 332 | case '\0': |
| 333 | switch (tok->quote) { |
| 334 | case Q_none: |
| 335 | /* Finish word and return */ |
| 336 | if (tok->flags & TOK_EAT2) { |
| 337 | tok->flags &= ~TOK_EAT2; |
| 338 | return 3; |
| 339 | } |
| 340 | goto tok_line_outok; |
| 341 | |
| 342 | case Q_single: |
| 343 | return 1; |
| 344 | |
| 345 | case Q_double: |
| 346 | return 2; |
| 347 | |
| 348 | case Q_doubleone: |
| 349 | tok->quote = Q_double; |
| 350 | *tok->wptr++ = *ptr; |
| 351 | break; |
| 352 | |
| 353 | case Q_one: |
| 354 | tok->quote = Q_none; |
| 355 | *tok->wptr++ = *ptr; |
| 356 | break; |
| 357 | |
| 358 | default: |
| 359 | return -1; |
| 360 | } |
| 361 | break; |
| 362 | |
| 363 | default: |
| 364 | tok->flags &= ~TOK_EAT2; |
| 365 | switch (tok->quote) { |
| 366 | case Q_none: |
| 367 | if (Strchr(tok->ifs, *ptr)wcschr(tok->ifs, *ptr) != NULL((void *)0)) |
| 368 | FUN(tok,finish)tok_wfinish(tok); |
| 369 | else |
| 370 | *tok->wptr++ = *ptr; |
| 371 | break; |
| 372 | |
| 373 | case Q_single: |
| 374 | case Q_double: |
| 375 | *tok->wptr++ = *ptr; |
| 376 | break; |
| 377 | |
| 378 | |
| 379 | case Q_doubleone: |
| 380 | *tok->wptr++ = '\\'; |
| 381 | tok->quote = Q_double; |
| 382 | *tok->wptr++ = *ptr; |
| 383 | break; |
| 384 | |
| 385 | case Q_one: |
| 386 | tok->quote = Q_none; |
| 387 | *tok->wptr++ = *ptr; |
| 388 | break; |
| 389 | |
| 390 | default: |
| 391 | return -1; |
| 392 | |
| 393 | } |
| 394 | break; |
| 395 | } |
| 396 | |
| 397 | if (tok->wptr >= tok->wmax - 4) { |
| 398 | size_t size = tok->wmax - tok->wspace + WINCR20; |
| 399 | Charwchar_t *s = reallocarray(tok->wspace, size, sizeof(*s)); |
| 400 | if (s == NULL((void *)0)) |
| 401 | return -1; |
| 402 | |
| 403 | if (s != tok->wspace) { |
| 404 | int i; |
| 405 | for (i = 0; i < tok->argc; i++) { |
| 406 | tok->argv[i] = |
| 407 | (tok->argv[i] - tok->wspace) + s; |
| 408 | } |
| 409 | tok->wptr = (tok->wptr - tok->wspace) + s; |
| 410 | tok->wstart = (tok->wstart - tok->wspace) + s; |
| 411 | tok->wspace = s; |
| 412 | } |
| 413 | tok->wmax = s + size; |
| 414 | } |
| 415 | if (tok->argc >= tok->amax - 4) { |
| 416 | Charwchar_t **p; |
| 417 | tok->amax += AINCR10; |
| 418 | p = reallocarray(tok->argv, tok->amax, sizeof(*p)); |
| 419 | if (p == NULL((void *)0)) { |
| 420 | tok->amax -= AINCR10; |
| 421 | return -1; |
| 422 | } |
| 423 | tok->argv = p; |
| 424 | } |
| 425 | } |
| 426 | tok_line_outok: |
| 427 | if (cc == -1 && co == -1) { |
| 428 | cc = tok->argc; |
| 429 | co = (int)(tok->wptr - tok->wstart); |
| 430 | } |
| 431 | if (cursorc != NULL((void *)0)) |
| 432 | *cursorc = cc; |
| 433 | if (cursoro != NULL((void *)0)) |
| 434 | *cursoro = co; |
| 435 | FUN(tok,finish)tok_wfinish(tok); |
| 436 | *argv = (const Charwchar_t **)tok->argv; |
| 437 | *argc = tok->argc; |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | /* FUN(tok,str)(): |
| 442 | * Simpler version of tok_line, taking a NUL terminated line |
| 443 | * and splitting into words, ignoring cursor state. |
| 444 | */ |
| 445 | int |
| 446 | FUN(tok,str)tok_wstr(TYPE(Tokenizer)TokenizerW *tok, const Charwchar_t *line, int *argc, |
| 447 | const Charwchar_t ***argv) |
| 448 | { |
| 449 | TYPE(LineInfo)LineInfoW li; |
| 450 | |
| 451 | memset(&li, 0, sizeof(li)); |
| 452 | li.buffer = line; |
| 453 | li.cursor = li.lastchar = Strchr(line, '\0')wcschr(line, '\0'); |
| 454 | return FUN(tok,line)tok_wline(tok, &li, argc, argv, NULL((void *)0), NULL((void *)0)); |
| 455 | } |