![[BACK]](/icons/back.gif){kind=icon}
Return to tokenizer.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / lib / libedit|
Return to tokenizer.c CVS log | Up to [cvs.NetBSD.org] / src / lib / libedit |
1.14 ! lukem 1: /* $NetBSD: tokenizer.c,v 1.13 2003/10/18 23:48:42 christos Exp $ */
1.2 lukem 2:
1.1 cgd 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.
1.12 agc 18: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 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:
1.10 christos 35: #include "config.h"
1.1 cgd 36: #if !defined(lint) && !defined(SCCSID)
1.2 lukem 37: #if 0
1.1 cgd 38: static char sccsid[] = "@(#)tokenizer.c 8.1 (Berkeley) 6/4/93";
1.2 lukem 39: #else
1.14 ! lukem 40: __RCSID("$NetBSD: tokenizer.c,v 1.13 2003/10/18 23:48:42 christos Exp $");
1.2 lukem 41: #endif
1.1 cgd 42: #endif /* not lint && not SCCSID */
43:
44: /*
45: * tokenize.c: Bourne shell like tokenizer
46: */
47: #include <string.h>
48: #include <stdlib.h>
1.14 ! lukem 49: #include "histedit.h"
1.1 cgd 50:
1.6 lukem 51: typedef enum {
52: Q_none, Q_single, Q_double, Q_one, Q_doubleone
53: } quote_t;
1.1 cgd 54:
1.6 lukem 55: #define IFS "\t \n"
1.1 cgd 56:
1.6 lukem 57: #define TOK_KEEP 1
58: #define TOK_EAT 2
1.1 cgd 59:
1.6 lukem 60: #define WINCR 20
61: #define AINCR 10
1.1 cgd 62:
1.13 christos 63: #define tok_strdup(a) strdup(a)
1.6 lukem 64: #define tok_malloc(a) malloc(a)
65: #define tok_free(a) free(a)
66: #define tok_realloc(a, b) realloc(a, b)
1.1 cgd 67:
68:
69: struct tokenizer {
1.6 lukem 70: char *ifs; /* In field separator */
71: int argc, amax; /* Current and maximum number of args */
72: char **argv; /* Argument list */
73: char *wptr, *wmax; /* Space and limit on the word buffer */
74: char *wstart; /* Beginning of next word */
75: char *wspace; /* Space of word buffer */
76: quote_t quote; /* Quoting state */
77: int flags; /* flags; */
1.1 cgd 78: };
79:
80:
1.6 lukem 81: private void tok_finish(Tokenizer *);
1.1 cgd 82:
83:
84: /* tok_finish():
85: * Finish a word in the tokenizer.
86: */
87: private void
1.6 lukem 88: tok_finish(Tokenizer *tok)
1.1 cgd 89: {
1.6 lukem 90:
91: *tok->wptr = '\0';
92: if ((tok->flags & TOK_KEEP) || tok->wptr != tok->wstart) {
93: tok->argv[tok->argc++] = tok->wstart;
94: tok->argv[tok->argc] = NULL;
95: tok->wstart = ++tok->wptr;
96: }
97: tok->flags &= ~TOK_KEEP;
1.1 cgd 98: }
99:
100:
101: /* tok_init():
102: * Initialize the tokenizer
103: */
104: public Tokenizer *
1.6 lukem 105: tok_init(const char *ifs)
1.1 cgd 106: {
1.6 lukem 107: Tokenizer *tok = (Tokenizer *) tok_malloc(sizeof(Tokenizer));
1.1 cgd 108:
1.11 christos 109: if (tok == NULL)
110: return NULL;
1.13 christos 111: tok->ifs = tok_strdup(ifs ? ifs : IFS);
1.11 christos 112: if (tok->ifs == NULL) {
113: tok_free((ptr_t)tok);
114: return NULL;
115: }
1.6 lukem 116: tok->argc = 0;
117: tok->amax = AINCR;
118: tok->argv = (char **) tok_malloc(sizeof(char *) * tok->amax);
1.11 christos 119: if (tok->argv == NULL) {
120: tok_free((ptr_t)tok->ifs);
121: tok_free((ptr_t)tok);
122: return NULL;
123: }
1.6 lukem 124: tok->argv[0] = NULL;
125: tok->wspace = (char *) tok_malloc(WINCR);
1.11 christos 126: if (tok->wspace == NULL) {
127: tok_free((ptr_t)tok->argv);
128: tok_free((ptr_t)tok->ifs);
129: tok_free((ptr_t)tok);
130: return NULL;
131: }
1.6 lukem 132: tok->wmax = tok->wspace + WINCR;
133: tok->wstart = tok->wspace;
134: tok->wptr = tok->wspace;
135: tok->flags = 0;
136: tok->quote = Q_none;
1.1 cgd 137:
1.6 lukem 138: return (tok);
1.1 cgd 139: }
140:
141:
142: /* tok_reset():
143: * Reset the tokenizer
144: */
145: public void
1.6 lukem 146: tok_reset(Tokenizer *tok)
1.1 cgd 147: {
1.6 lukem 148:
149: tok->argc = 0;
150: tok->wstart = tok->wspace;
151: tok->wptr = tok->wspace;
152: tok->flags = 0;
153: tok->quote = Q_none;
1.1 cgd 154: }
155:
156:
157: /* tok_end():
158: * Clean up
159: */
160: public void
1.6 lukem 161: tok_end(Tokenizer *tok)
1.1 cgd 162: {
1.6 lukem 163:
164: tok_free((ptr_t) tok->ifs);
165: tok_free((ptr_t) tok->wspace);
166: tok_free((ptr_t) tok->argv);
167: tok_free((ptr_t) tok);
1.1 cgd 168: }
169:
170:
171:
172: /* tok_line():
1.14 ! lukem 173: * Bourne shell (sh(1)) like tokenizing
! 174: * Arguments:
! 175: * tok current tokenizer state (setup with tok_init())
! 176: * line line to parse
! 177: * Returns:
! 178: * -1 Internal error
! 179: * 3 Quoted return
! 180: * 2 Unmatched double quote
! 181: * 1 Unmatched single quote
! 182: * 0 Ok
! 183: * Modifies (if return value is 0):
! 184: * argc number of arguments
! 185: * argv argument array
! 186: * cursorc if !NULL, argv element containing cursor
! 187: * cursorv if !NULL, offset in argv[cursorc] of cursor
1.1 cgd 188: */
189: public int
1.14 ! lukem 190: tok_line(Tokenizer *tok, const LineInfo *line,
! 191: int *argc, const char ***argv, int *cursorc, int *cursoro)
1.1 cgd 192: {
1.6 lukem 193: const char *ptr;
1.14 ! lukem 194: int cc, co;
1.1 cgd 195:
1.14 ! lukem 196: cc = co = -1;
! 197: ptr = line->buffer;
! 198: for (ptr = line->buffer; ;ptr++) {
! 199: if (ptr >= line->lastchar)
! 200: ptr = "";
! 201: if (ptr == line->cursor) {
! 202: cc = tok->argc;
! 203: co = tok->wptr - tok->wstart;
! 204: }
! 205: switch (*ptr) {
1.6 lukem 206: case '\'':
207: tok->flags |= TOK_KEEP;
208: tok->flags &= ~TOK_EAT;
209: switch (tok->quote) {
210: case Q_none:
211: tok->quote = Q_single; /* Enter single quote
212: * mode */
213: break;
214:
215: case Q_single: /* Exit single quote mode */
216: tok->quote = Q_none;
217: break;
218:
219: case Q_one: /* Quote this ' */
220: tok->quote = Q_none;
221: *tok->wptr++ = *ptr;
222: break;
223:
224: case Q_double: /* Stay in double quote mode */
225: *tok->wptr++ = *ptr;
226: break;
227:
228: case Q_doubleone: /* Quote this ' */
229: tok->quote = Q_double;
230: *tok->wptr++ = *ptr;
231: break;
232:
233: default:
234: return (-1);
235: }
236: break;
237:
238: case '"':
239: tok->flags &= ~TOK_EAT;
240: tok->flags |= TOK_KEEP;
241: switch (tok->quote) {
242: case Q_none: /* Enter double quote mode */
243: tok->quote = Q_double;
244: break;
245:
246: case Q_double: /* Exit double quote mode */
247: tok->quote = Q_none;
248: break;
249:
250: case Q_one: /* Quote this " */
251: tok->quote = Q_none;
252: *tok->wptr++ = *ptr;
253: break;
254:
255: case Q_single: /* Stay in single quote mode */
256: *tok->wptr++ = *ptr;
257: break;
258:
259: case Q_doubleone: /* Quote this " */
260: tok->quote = Q_double;
261: *tok->wptr++ = *ptr;
262: break;
263:
264: default:
265: return (-1);
266: }
267: break;
268:
269: case '\\':
270: tok->flags |= TOK_KEEP;
271: tok->flags &= ~TOK_EAT;
272: switch (tok->quote) {
273: case Q_none: /* Quote next character */
274: tok->quote = Q_one;
275: break;
276:
277: case Q_double: /* Quote next character */
278: tok->quote = Q_doubleone;
279: break;
280:
281: case Q_one: /* Quote this, restore state */
282: *tok->wptr++ = *ptr;
283: tok->quote = Q_none;
284: break;
285:
286: case Q_single: /* Stay in single quote mode */
287: *tok->wptr++ = *ptr;
288: break;
289:
290: case Q_doubleone: /* Quote this \ */
291: tok->quote = Q_double;
292: *tok->wptr++ = *ptr;
293: break;
294:
295: default:
296: return (-1);
297: }
298: break;
299:
300: case '\n':
301: tok->flags &= ~TOK_EAT;
302: switch (tok->quote) {
303: case Q_none:
1.14 ! lukem 304: goto tok_line_outok;
1.6 lukem 305:
306: case Q_single:
307: case Q_double:
308: *tok->wptr++ = *ptr; /* Add the return */
309: break;
310:
311: case Q_doubleone: /* Back to double, eat the '\n' */
312: tok->flags |= TOK_EAT;
313: tok->quote = Q_double;
314: break;
315:
316: case Q_one: /* No quote, more eat the '\n' */
317: tok->flags |= TOK_EAT;
318: tok->quote = Q_none;
319: break;
320:
321: default:
322: return (0);
323: }
324: break;
325:
326: case '\0':
327: switch (tok->quote) {
328: case Q_none:
329: /* Finish word and return */
330: if (tok->flags & TOK_EAT) {
331: tok->flags &= ~TOK_EAT;
332: return (3);
333: }
1.14 ! lukem 334: goto tok_line_outok;
1.6 lukem 335:
336: case Q_single:
337: return (1);
338:
339: case Q_double:
340: return (2);
341:
342: case Q_doubleone:
343: tok->quote = Q_double;
344: *tok->wptr++ = *ptr;
345: break;
346:
347: case Q_one:
348: tok->quote = Q_none;
349: *tok->wptr++ = *ptr;
350: break;
351:
352: default:
353: return (-1);
354: }
355: break;
356:
357: default:
358: tok->flags &= ~TOK_EAT;
359: switch (tok->quote) {
360: case Q_none:
361: if (strchr(tok->ifs, *ptr) != NULL)
362: tok_finish(tok);
363: else
364: *tok->wptr++ = *ptr;
365: break;
366:
367: case Q_single:
368: case Q_double:
369: *tok->wptr++ = *ptr;
370: break;
371:
372:
373: case Q_doubleone:
374: *tok->wptr++ = '\\';
375: tok->quote = Q_double;
376: *tok->wptr++ = *ptr;
377: break;
378:
379: case Q_one:
380: tok->quote = Q_none;
381: *tok->wptr++ = *ptr;
382: break;
1.1 cgd 383:
1.6 lukem 384: default:
385: return (-1);
1.1 cgd 386:
1.6 lukem 387: }
388: break;
389: }
1.1 cgd 390:
1.6 lukem 391: if (tok->wptr >= tok->wmax - 4) {
392: size_t size = tok->wmax - tok->wspace + WINCR;
393: char *s = (char *) tok_realloc(tok->wspace, size);
1.7 christos 394: if (s == NULL)
395: return (-1);
1.6 lukem 396:
1.8 christos 397: if (s != tok->wspace) {
1.6 lukem 398: int i;
1.8 christos 399: for (i = 0; i < tok->argc; i++) {
400: tok->argv[i] =
401: (tok->argv[i] - tok->wspace) + s;
402: }
403: tok->wptr = (tok->wptr - tok->wspace) + s;
404: tok->wstart = (tok->wstart - tok->wspace) + s;
1.6 lukem 405: tok->wspace = s;
406: }
1.9 christos 407: tok->wmax = s + size;
1.6 lukem 408: }
409: if (tok->argc >= tok->amax - 4) {
1.7 christos 410: char **p;
1.6 lukem 411: tok->amax += AINCR;
1.7 christos 412: p = (char **) tok_realloc(tok->argv,
1.6 lukem 413: tok->amax * sizeof(char *));
1.7 christos 414: if (p == NULL)
415: return (-1);
416: tok->argv = p;
1.6 lukem 417: }
1.1 cgd 418: }
1.14 ! lukem 419: tok_line_outok:
! 420: if (cc == -1 && co == -1) {
! 421: cc = tok->argc;
! 422: co = tok->wptr - tok->wstart;
! 423: }
! 424: if (cursorc != NULL)
! 425: *cursorc = cc;
! 426: if (cursoro != NULL)
! 427: *cursoro = co;
! 428: tok_finish(tok);
! 429: *argv = (const char **)tok->argv;
! 430: *argc = tok->argc;
! 431: return (0);
! 432: }
! 433:
! 434: /* tok_str():
! 435: * Simpler version of tok_line, taking a NUL terminated line
! 436: * and splitting into words, ignoring cursor state.
! 437: */
! 438: public int
! 439: tok_str(Tokenizer *tok, const char *line, int *argc, const char ***argv)
! 440: {
! 441: LineInfo li;
! 442:
! 443: memset(&li, 0, sizeof(li));
! 444: li.buffer = line;
! 445: li.cursor = li.lastchar = strchr(line, '\0');
! 446: return (tok_line(tok, &li, argc, argv, NULL, NULL));
1.1 cgd 447: }