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1.28 ! christos 1: /* $NetBSD: tokenizer.c,v 1.27 2016/04/11 16:06:52 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
1.28 ! christos 40: __RCSID("$NetBSD: tokenizer.c,v 1.27 2016/04/11 16:06:52 christos Exp $");
1.2 lukem 41: #endif
1.1 cgd 42: #endif /* not lint && not SCCSID */
43:
1.16 christos 44: /* We build this file twice, once as NARROW, once as WIDE. */
1.1 cgd 45: /*
46: * tokenize.c: Bourne shell like tokenizer
47: */
1.24 christos 48: #include <stdlib.h>
1.1 cgd 49: #include <string.h>
1.24 christos 50:
1.14 lukem 51: #include "histedit.h"
1.1 cgd 52:
1.6 lukem 53: typedef enum {
54: Q_none, Q_single, Q_double, Q_one, Q_doubleone
55: } quote_t;
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:
1.16 christos 63: #define IFS STR("\t \n")
64:
1.6 lukem 65: #define tok_malloc(a) malloc(a)
66: #define tok_free(a) free(a)
67: #define tok_realloc(a, b) realloc(a, b)
1.1 cgd 68:
1.25 christos 69: #ifdef NARROWCHAR
1.26 christos 70: #define Char char
1.25 christos 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
1.26 christos 77: #define Char wchar_t
1.25 christos 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
1.1 cgd 84:
1.18 christos 85: struct TYPE(tokenizer) {
1.16 christos 86: Char *ifs; /* In field separator */
1.21 christos 87: size_t argc, amax; /* Current and maximum number of args */
1.16 christos 88: 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 */
1.6 lukem 92: quote_t quote; /* Quoting state */
93: int flags; /* flags; */
1.1 cgd 94: };
95:
96:
1.28 ! christos 97: static void FUN(tok,finish)(TYPE(Tokenizer) *);
1.1 cgd 98:
99:
1.16 christos 100: /* FUN(tok,finish)():
1.1 cgd 101: * Finish a word in the tokenizer.
102: */
1.28 ! christos 103: static void
1.16 christos 104: FUN(tok,finish)(TYPE(Tokenizer) *tok)
1.1 cgd 105: {
1.6 lukem 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;
1.1 cgd 114: }
115:
116:
1.16 christos 117: /* FUN(tok,init)():
1.1 cgd 118: * Initialize the tokenizer
119: */
1.28 ! christos 120: TYPE(Tokenizer) *
1.16 christos 121: FUN(tok,init)(const Char *ifs)
1.1 cgd 122: {
1.19 christos 123: TYPE(Tokenizer) *tok = tok_malloc(sizeof(*tok));
1.1 cgd 124:
1.11 christos 125: if (tok == NULL)
126: return NULL;
1.13 christos 127: tok->ifs = tok_strdup(ifs ? ifs : IFS);
1.11 christos 128: if (tok->ifs == NULL) {
1.19 christos 129: tok_free(tok);
1.11 christos 130: return NULL;
131: }
1.6 lukem 132: tok->argc = 0;
133: tok->amax = AINCR;
1.16 christos 134: tok->argv = tok_malloc(sizeof(*tok->argv) * tok->amax);
1.11 christos 135: if (tok->argv == NULL) {
1.19 christos 136: tok_free(tok->ifs);
137: tok_free(tok);
1.11 christos 138: return NULL;
139: }
1.6 lukem 140: tok->argv[0] = NULL;
1.16 christos 141: tok->wspace = tok_malloc(WINCR * sizeof(*tok->wspace));
1.11 christos 142: if (tok->wspace == NULL) {
1.19 christos 143: tok_free(tok->argv);
144: tok_free(tok->ifs);
145: tok_free(tok);
1.11 christos 146: return NULL;
147: }
1.6 lukem 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;
1.1 cgd 153:
1.20 christos 154: return tok;
1.1 cgd 155: }
156:
157:
1.16 christos 158: /* FUN(tok,reset)():
1.1 cgd 159: * Reset the tokenizer
160: */
1.28 ! christos 161: void
1.16 christos 162: FUN(tok,reset)(TYPE(Tokenizer) *tok)
1.1 cgd 163: {
1.6 lukem 164:
165: tok->argc = 0;
166: tok->wstart = tok->wspace;
167: tok->wptr = tok->wspace;
168: tok->flags = 0;
169: tok->quote = Q_none;
1.1 cgd 170: }
171:
172:
1.16 christos 173: /* FUN(tok,end)():
1.1 cgd 174: * Clean up
175: */
1.28 ! christos 176: void
1.16 christos 177: FUN(tok,end)(TYPE(Tokenizer) *tok)
1.1 cgd 178: {
1.6 lukem 179:
1.19 christos 180: tok_free(tok->ifs);
181: tok_free(tok->wspace);
182: tok_free(tok->argv);
183: tok_free(tok);
1.1 cgd 184: }
185:
186:
187:
1.16 christos 188: /* FUN(tok,line)():
1.14 lukem 189: * Bourne shell (sh(1)) like tokenizing
190: * Arguments:
1.16 christos 191: * tok current tokenizer state (setup with FUN(tok,init)())
1.14 lukem 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
1.1 cgd 204: */
1.28 ! christos 205: int
1.17 christos 206: FUN(tok,line)(TYPE(Tokenizer) *tok, const TYPE(LineInfo) *line,
1.16 christos 207: int *argc, const Char ***argv, int *cursorc, int *cursoro)
1.1 cgd 208: {
1.16 christos 209: const Char *ptr;
1.14 lukem 210: int cc, co;
1.1 cgd 211:
1.14 lukem 212: cc = co = -1;
213: ptr = line->buffer;
214: for (ptr = line->buffer; ;ptr++) {
215: if (ptr >= line->lastchar)
1.16 christos 216: ptr = STR("");
1.14 lukem 217: if (ptr == line->cursor) {
1.21 christos 218: cc = (int)tok->argc;
1.15 christos 219: co = (int)(tok->wptr - tok->wstart);
1.14 lukem 220: }
221: switch (*ptr) {
1.6 lukem 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:
1.20 christos 250: return -1;
1.6 lukem 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:
1.20 christos 281: return -1;
1.6 lukem 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:
1.20 christos 312: return -1;
1.6 lukem 313: }
314: break;
315:
316: case '\n':
317: tok->flags &= ~TOK_EAT;
318: switch (tok->quote) {
319: case Q_none:
1.14 lukem 320: goto tok_line_outok;
1.6 lukem 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:
1.20 christos 338: return 0;
1.6 lukem 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;
1.20 christos 348: return 3;
1.6 lukem 349: }
1.14 lukem 350: goto tok_line_outok;
1.6 lukem 351:
352: case Q_single:
1.20 christos 353: return 1;
1.6 lukem 354:
355: case Q_double:
1.20 christos 356: return 2;
1.6 lukem 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:
1.20 christos 369: return -1;
1.6 lukem 370: }
371: break;
372:
373: default:
374: tok->flags &= ~TOK_EAT;
375: switch (tok->quote) {
376: case Q_none:
1.16 christos 377: if (Strchr(tok->ifs, *ptr) != NULL)
378: FUN(tok,finish)(tok);
1.6 lukem 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;
1.1 cgd 399:
1.6 lukem 400: default:
1.20 christos 401: return -1;
1.1 cgd 402:
1.6 lukem 403: }
404: break;
405: }
1.1 cgd 406:
1.6 lukem 407: if (tok->wptr >= tok->wmax - 4) {
1.21 christos 408: size_t size = (size_t)(tok->wmax - tok->wspace + WINCR);
1.16 christos 409: Char *s = tok_realloc(tok->wspace,
410: size * sizeof(*s));
1.7 christos 411: if (s == NULL)
1.20 christos 412: return -1;
1.6 lukem 413:
1.8 christos 414: if (s != tok->wspace) {
1.21 christos 415: size_t i;
1.8 christos 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;
1.6 lukem 422: tok->wspace = s;
423: }
1.9 christos 424: tok->wmax = s + size;
1.6 lukem 425: }
426: if (tok->argc >= tok->amax - 4) {
1.16 christos 427: Char **p;
1.6 lukem 428: tok->amax += AINCR;
1.16 christos 429: p = tok_realloc(tok->argv, tok->amax * sizeof(*p));
1.23 christos 430: if (p == NULL) {
431: tok->amax -= AINCR;
1.20 christos 432: return -1;
1.23 christos 433: }
1.7 christos 434: tok->argv = p;
1.6 lukem 435: }
1.1 cgd 436: }
1.14 lukem 437: tok_line_outok:
438: if (cc == -1 && co == -1) {
1.21 christos 439: cc = (int)tok->argc;
1.15 christos 440: co = (int)(tok->wptr - tok->wstart);
1.14 lukem 441: }
442: if (cursorc != NULL)
443: *cursorc = cc;
444: if (cursoro != NULL)
445: *cursoro = co;
1.16 christos 446: FUN(tok,finish)(tok);
447: *argv = (const Char **)tok->argv;
1.21 christos 448: *argc = (int)tok->argc;
1.20 christos 449: return 0;
1.14 lukem 450: }
451:
1.16 christos 452: /* FUN(tok,str)():
1.14 lukem 453: * Simpler version of tok_line, taking a NUL terminated line
454: * and splitting into words, ignoring cursor state.
455: */
1.28 ! christos 456: int
1.16 christos 457: FUN(tok,str)(TYPE(Tokenizer) *tok, const Char *line, int *argc,
458: const Char ***argv)
1.14 lukem 459: {
1.17 christos 460: TYPE(LineInfo) li;
1.14 lukem 461:
462: memset(&li, 0, sizeof(li));
463: li.buffer = line;
1.16 christos 464: li.cursor = li.lastchar = Strchr(line, '\0');
1.22 christos 465: return FUN(tok,line)(tok, &li, argc, argv, NULL, NULL);
1.1 cgd 466: }