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1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Christos Zoulas of Cornell University.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
36 * $NetBSD: tokenizer.c,v 1.6 2000/09/04 22:06:33 lukem Exp $
32 * $NetBSD: tokenizer.c,v 1.14 2003/12/05 13:37:48 lukem Exp $
33 */
34
35#if !defined(lint) && !defined(SCCSID)
36static char sccsid[] = "@(#)tokenizer.c 8.1 (Berkeley) 6/4/93";
37#endif /* not lint && not SCCSID */
38#include <sys/cdefs.h>
43__FBSDID("$FreeBSD: head/lib/libedit/tokenizer.c 148814 2005-08-07 08:35:39Z stefanf $");
39__FBSDID("$FreeBSD: head/lib/libedit/tokenizer.c 148834 2005-08-07 20:55:59Z stefanf $");
40
41/*
42 * tokenize.c: Bourne shell like tokenizer
43 */
44#include "sys.h"
45#include <string.h>
46#include <stdlib.h>
51#include "tokenizer.h"
47#include "histedit.h"
48
49typedef enum {
50 Q_none, Q_single, Q_double, Q_one, Q_doubleone
51} quote_t;
52
53#define IFS "\t \n"
54
55#define TOK_KEEP 1
56#define TOK_EAT 2
57
58#define WINCR 20
59#define AINCR 10
60
61#define tok_strdup(a) strdup(a)
62#define tok_malloc(a) malloc(a)
63#define tok_free(a) free(a)
64#define tok_realloc(a, b) realloc(a, b)
65
66
67struct tokenizer {
68 char *ifs; /* In field separator */
69 int argc, amax; /* Current and maximum number of args */
70 char **argv; /* Argument list */
71 char *wptr, *wmax; /* Space and limit on the word buffer */
72 char *wstart; /* Beginning of next word */
73 char *wspace; /* Space of word buffer */
74 quote_t quote; /* Quoting state */
75 int flags; /* flags; */
76};
77
78
79private void tok_finish(Tokenizer *);
80
81
82/* tok_finish():
83 * Finish a word in the tokenizer.
84 */
85private void
86tok_finish(Tokenizer *tok)
87{
88
89 *tok->wptr = '\0';
90 if ((tok->flags & TOK_KEEP) || tok->wptr != tok->wstart) {
91 tok->argv[tok->argc++] = tok->wstart;
92 tok->argv[tok->argc] = NULL;
93 tok->wstart = ++tok->wptr;
94 }
95 tok->flags &= ~TOK_KEEP;
96}
97
98
99/* tok_init():
100 * Initialize the tokenizer
101 */
102public Tokenizer *
103tok_init(const char *ifs)
104{
105 Tokenizer *tok = (Tokenizer *) tok_malloc(sizeof(Tokenizer));
106
110 tok->ifs = strdup(ifs ? ifs : IFS);
107 if (tok == NULL)
108 return NULL;
109 tok->ifs = tok_strdup(ifs ? ifs : IFS);
110 if (tok->ifs == NULL) {
111 tok_free((ptr_t)tok);
112 return NULL;
113 }
114 tok->argc = 0;
115 tok->amax = AINCR;
116 tok->argv = (char **) tok_malloc(sizeof(char *) * tok->amax);
114 if (tok->argv == NULL)
115 return (NULL);
117 if (tok->argv == NULL) {
118 tok_free((ptr_t)tok->ifs);
119 tok_free((ptr_t)tok);
120 return NULL;
121 }
122 tok->argv[0] = NULL;
123 tok->wspace = (char *) tok_malloc(WINCR);
118 if (tok->wspace == NULL)
119 return (NULL);
124 if (tok->wspace == NULL) {
125 tok_free((ptr_t)tok->argv);
126 tok_free((ptr_t)tok->ifs);
127 tok_free((ptr_t)tok);
128 return NULL;
129 }
130 tok->wmax = tok->wspace + WINCR;
131 tok->wstart = tok->wspace;
132 tok->wptr = tok->wspace;
133 tok->flags = 0;
134 tok->quote = Q_none;
135
136 return (tok);
137}
138
139
140/* tok_reset():
141 * Reset the tokenizer
142 */
143public void
144tok_reset(Tokenizer *tok)
145{
146
147 tok->argc = 0;
148 tok->wstart = tok->wspace;
149 tok->wptr = tok->wspace;
150 tok->flags = 0;
151 tok->quote = Q_none;
152}
153
154
155/* tok_end():
156 * Clean up
157 */
158public void
159tok_end(Tokenizer *tok)
160{
161
162 tok_free((ptr_t) tok->ifs);
163 tok_free((ptr_t) tok->wspace);
164 tok_free((ptr_t) tok->argv);
165 tok_free((ptr_t) tok);
166}
167
168
169
170/* tok_line():
161 * Bourne shell like tokenizing
162 * Return:
163 * -1: Internal error
164 * 3: Quoted return
165 * 2: Unmatched double quote
166 * 1: Unmatched single quote
167 * 0: Ok
171 * Bourne shell (sh(1)) like tokenizing
172 * Arguments:
173 * tok current tokenizer state (setup with tok_init())
174 * line line to parse
175 * Returns:
176 * -1 Internal error
177 * 3 Quoted return
178 * 2 Unmatched double quote
179 * 1 Unmatched single quote
180 * 0 Ok
181 * Modifies (if return value is 0):
182 * argc number of arguments
183 * argv argument array
184 * cursorc if !NULL, argv element containing cursor
185 * cursorv if !NULL, offset in argv[cursorc] of cursor
186 */
187public int
170tok_line(Tokenizer *tok, const char *line, int *argc, char ***argv)
188tok_line(Tokenizer *tok, const LineInfo *line,
189 int *argc, const char ***argv, int *cursorc, int *cursoro)
190{
191 const char *ptr;
192 int cc, co;
193
174 for (;;) {
175 switch (*(ptr = line++)) {
194 cc = co = -1;
195 ptr = line->buffer;
196 for (ptr = line->buffer; ;ptr++) {
197 if (ptr >= line->lastchar)
198 ptr = "";
199 if (ptr == line->cursor) {
200 cc = tok->argc;
201 co = tok->wptr - tok->wstart;
202 }
203 switch (*ptr) {
204 case '\'':
205 tok->flags |= TOK_KEEP;
206 tok->flags &= ~TOK_EAT;
207 switch (tok->quote) {
208 case Q_none:
209 tok->quote = Q_single; /* Enter single quote
210 * mode */
211 break;
212
213 case Q_single: /* Exit single quote mode */
214 tok->quote = Q_none;
215 break;
216
217 case Q_one: /* Quote this ' */
218 tok->quote = Q_none;
219 *tok->wptr++ = *ptr;
220 break;
221
222 case Q_double: /* Stay in double quote mode */
223 *tok->wptr++ = *ptr;
224 break;
225
226 case Q_doubleone: /* Quote this ' */
227 tok->quote = Q_double;
228 *tok->wptr++ = *ptr;
229 break;
230
231 default:
232 return (-1);
233 }
234 break;
235
236 case '"':
237 tok->flags &= ~TOK_EAT;
238 tok->flags |= TOK_KEEP;
239 switch (tok->quote) {
240 case Q_none: /* Enter double quote mode */
241 tok->quote = Q_double;
242 break;
243
244 case Q_double: /* Exit double quote mode */
245 tok->quote = Q_none;
246 break;
247
248 case Q_one: /* Quote this " */
249 tok->quote = Q_none;
250 *tok->wptr++ = *ptr;
251 break;
252
253 case Q_single: /* Stay in single quote mode */
254 *tok->wptr++ = *ptr;
255 break;
256
257 case Q_doubleone: /* Quote this " */
258 tok->quote = Q_double;
259 *tok->wptr++ = *ptr;
260 break;
261
262 default:
263 return (-1);
264 }
265 break;
266
267 case '\\':
268 tok->flags |= TOK_KEEP;
269 tok->flags &= ~TOK_EAT;
270 switch (tok->quote) {
271 case Q_none: /* Quote next character */
272 tok->quote = Q_one;
273 break;
274
275 case Q_double: /* Quote next character */
276 tok->quote = Q_doubleone;
277 break;
278
279 case Q_one: /* Quote this, restore state */
280 *tok->wptr++ = *ptr;
281 tok->quote = Q_none;
282 break;
283
284 case Q_single: /* Stay in single quote mode */
285 *tok->wptr++ = *ptr;
286 break;
287
288 case Q_doubleone: /* Quote this \ */
289 tok->quote = Q_double;
290 *tok->wptr++ = *ptr;
291 break;
292
293 default:
294 return (-1);
295 }
296 break;
297
298 case '\n':
299 tok->flags &= ~TOK_EAT;
300 switch (tok->quote) {
301 case Q_none:
274 tok_finish(tok);
275 *argv = tok->argv;
276 *argc = tok->argc;
277 return (0);
302 goto tok_line_outok;
303
304 case Q_single:
305 case Q_double:
306 *tok->wptr++ = *ptr; /* Add the return */
307 break;
308
309 case Q_doubleone: /* Back to double, eat the '\n' */
310 tok->flags |= TOK_EAT;
311 tok->quote = Q_double;
312 break;
313
314 case Q_one: /* No quote, more eat the '\n' */
315 tok->flags |= TOK_EAT;
316 tok->quote = Q_none;
317 break;
318
319 default:
320 return (0);
321 }
322 break;
323
324 case '\0':
325 switch (tok->quote) {
326 case Q_none:
327 /* Finish word and return */
328 if (tok->flags & TOK_EAT) {
329 tok->flags &= ~TOK_EAT;
330 return (3);
331 }
307 tok_finish(tok);
308 *argv = tok->argv;
309 *argc = tok->argc;
310 return (0);
332 goto tok_line_outok;
333
334 case Q_single:
335 return (1);
336
337 case Q_double:
338 return (2);
339
340 case Q_doubleone:
341 tok->quote = Q_double;
342 *tok->wptr++ = *ptr;
343 break;
344
345 case Q_one:
346 tok->quote = Q_none;
347 *tok->wptr++ = *ptr;
348 break;
349
350 default:
351 return (-1);
352 }
353 break;
354
355 default:
356 tok->flags &= ~TOK_EAT;
357 switch (tok->quote) {
358 case Q_none:
359 if (strchr(tok->ifs, *ptr) != NULL)
360 tok_finish(tok);
361 else
362 *tok->wptr++ = *ptr;
363 break;
364
365 case Q_single:
366 case Q_double:
367 *tok->wptr++ = *ptr;
368 break;
369
370
371 case Q_doubleone:
372 *tok->wptr++ = '\\';
373 tok->quote = Q_double;
374 *tok->wptr++ = *ptr;
375 break;
376
377 case Q_one:
378 tok->quote = Q_none;
379 *tok->wptr++ = *ptr;
380 break;
381
382 default:
383 return (-1);
384
385 }
386 break;
387 }
388
389 if (tok->wptr >= tok->wmax - 4) {
390 size_t size = tok->wmax - tok->wspace + WINCR;
391 char *s = (char *) tok_realloc(tok->wspace, size);
370 /* SUPPRESS 22 */
371 int offs = s - tok->wspace;
392 if (s == NULL)
393 return (-1);
394
375 if (offs != 0) {
395 if (s != tok->wspace) {
396 int i;
377 for (i = 0; i < tok->argc; i++)
378 tok->argv[i] = tok->argv[i] + offs;
379 tok->wptr = tok->wptr + offs;
380 tok->wstart = tok->wstart + offs;
381 tok->wmax = s + size;
397 for (i = 0; i < tok->argc; i++) {
398 tok->argv[i] =
399 (tok->argv[i] - tok->wspace) + s;
400 }
401 tok->wptr = (tok->wptr - tok->wspace) + s;
402 tok->wstart = (tok->wstart - tok->wspace) + s;
403 tok->wspace = s;
404 }
405 tok->wmax = s + size;
406 }
407 if (tok->argc >= tok->amax - 4) {
408 char **p;
409 tok->amax += AINCR;
410 p = (char **) tok_realloc(tok->argv,
411 tok->amax * sizeof(char *));
412 if (p == NULL)
413 return (-1);
414 tok->argv = p;
415 }
416 }
417 tok_line_outok:
418 if (cc == -1 && co == -1) {
419 cc = tok->argc;
420 co = tok->wptr - tok->wstart;
421 }
422 if (cursorc != NULL)
423 *cursorc = cc;
424 if (cursoro != NULL)
425 *cursoro = co;
426 tok_finish(tok);
427 *argv = (const char **)tok->argv;
428 *argc = tok->argc;
429 return (0);
430}
431
432/* tok_str():
433 * Simpler version of tok_line, taking a NUL terminated line
434 * and splitting into words, ignoring cursor state.
435 */
436public int
437tok_str(Tokenizer *tok, const char *line, int *argc, const char ***argv)
438{
439 LineInfo li;
440
441 memset(&li, 0, sizeof(li));
442 li.buffer = line;
443 li.cursor = li.lastchar = strchr(line, '\0');
444 return (tok_line(tok, &li, argc, argv, NULL, NULL));
445}