Annotation of src/lib/libedit/chared.c, Revision 1.51
1.51 ! christos 1: /* $NetBSD: chared.c,v 1.50 2016/04/09 18:43:17 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.
1.19 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:
1.15 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[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93";
1.2 lukem 39: #else
1.51 ! christos 40: __RCSID("$NetBSD: chared.c,v 1.50 2016/04/09 18:43:17 christos Exp $");
1.2 lukem 41: #endif
1.1 cgd 42: #endif /* not lint && not SCCSID */
43:
1.7 simonb 44: /*
1.1 cgd 45: * chared.c: Character editor utilities
46: */
1.46 christos 47: #include <ctype.h>
1.1 cgd 48: #include <stdlib.h>
1.46 christos 49: #include <string.h>
1.45 christos 50:
1.1 cgd 51: #include "el.h"
1.45 christos 52: #include "common.h"
1.1 cgd 53:
1.26 sketch 54: private void ch__clearmacro (EditLine *);
1.24 christos 55:
1.12 jdolecek 56: /* value to leave unused in line buffer */
57: #define EL_LEAVE 2
58:
1.1 cgd 59: /* cv_undo():
60: * Handle state for the vi undo command
61: */
62: protected void
1.17 christos 63: cv_undo(EditLine *el)
1.9 lukem 64: {
65: c_undo_t *vu = &el->el_chared.c_undo;
1.17 christos 66: c_redo_t *r = &el->el_chared.c_redo;
1.27 christos 67: size_t size;
1.16 christos 68:
1.17 christos 69: /* Save entire line for undo */
1.35 christos 70: size = (size_t)(el->el_line.lastchar - el->el_line.buffer);
71: vu->len = (ssize_t)size;
1.27 christos 72: vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer);
1.28 christos 73: (void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf));
1.16 christos 74:
1.17 christos 75: /* save command info for redo */
76: r->count = el->el_state.doingarg ? el->el_state.argument : 0;
77: r->action = el->el_chared.c_vcmd.action;
78: r->pos = r->buf;
79: r->cmd = el->el_state.thiscmd;
80: r->ch = el->el_state.thisch;
81: }
82:
83: /* cv_yank():
84: * Save yank/delete data for paste
85: */
86: protected void
1.28 christos 87: cv_yank(EditLine *el, const Char *ptr, int size)
1.17 christos 88: {
89: c_kill_t *k = &el->el_chared.c_kill;
90:
1.35 christos 91: (void)memcpy(k->buf, ptr, (size_t)size * sizeof(*k->buf));
1.17 christos 92: k->last = k->buf + size;
1.1 cgd 93: }
94:
95:
1.7 simonb 96: /* c_insert():
1.1 cgd 97: * Insert num characters
98: */
99: protected void
1.9 lukem 100: c_insert(EditLine *el, int num)
101: {
1.28 christos 102: Char *cp;
1.9 lukem 103:
1.17 christos 104: if (el->el_line.lastchar + num >= el->el_line.limit) {
1.27 christos 105: if (!ch_enlargebufs(el, (size_t)num))
1.17 christos 106: return; /* can't go past end of buffer */
107: }
1.9 lukem 108:
109: if (el->el_line.cursor < el->el_line.lastchar) {
110: /* if I must move chars */
111: for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
112: cp[num] = *cp;
113: }
114: el->el_line.lastchar += num;
115: }
1.1 cgd 116:
117:
118: /* c_delafter():
119: * Delete num characters after the cursor
120: */
121: protected void
1.9 lukem 122: c_delafter(EditLine *el, int num)
1.1 cgd 123: {
124:
1.9 lukem 125: if (el->el_line.cursor + num > el->el_line.lastchar)
1.27 christos 126: num = (int)(el->el_line.lastchar - el->el_line.cursor);
1.1 cgd 127:
1.17 christos 128: if (el->el_map.current != el->el_map.emacs) {
129: cv_undo(el);
130: cv_yank(el, el->el_line.cursor, num);
131: }
1.16 christos 132:
1.9 lukem 133: if (num > 0) {
1.28 christos 134: Char *cp;
1.1 cgd 135:
1.9 lukem 136: for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
137: *cp = cp[num];
1.1 cgd 138:
1.9 lukem 139: el->el_line.lastchar -= num;
140: }
1.1 cgd 141: }
142:
143:
1.22 mycroft 144: /* c_delafter1():
145: * Delete the character after the cursor, do not yank
146: */
147: protected void
148: c_delafter1(EditLine *el)
149: {
1.28 christos 150: Char *cp;
1.22 mycroft 151:
152: for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
153: *cp = cp[1];
154:
155: el->el_line.lastchar--;
156: }
157:
158:
1.1 cgd 159: /* c_delbefore():
160: * Delete num characters before the cursor
161: */
162: protected void
1.9 lukem 163: c_delbefore(EditLine *el, int num)
1.1 cgd 164: {
165:
1.9 lukem 166: if (el->el_line.cursor - num < el->el_line.buffer)
1.27 christos 167: num = (int)(el->el_line.cursor - el->el_line.buffer);
1.1 cgd 168:
1.17 christos 169: if (el->el_map.current != el->el_map.emacs) {
170: cv_undo(el);
171: cv_yank(el, el->el_line.cursor - num, num);
172: }
1.16 christos 173:
1.9 lukem 174: if (num > 0) {
1.28 christos 175: Char *cp;
1.1 cgd 176:
1.9 lukem 177: for (cp = el->el_line.cursor - num;
178: cp <= el->el_line.lastchar;
179: cp++)
180: *cp = cp[num];
1.1 cgd 181:
1.9 lukem 182: el->el_line.lastchar -= num;
183: }
1.1 cgd 184: }
185:
186:
1.22 mycroft 187: /* c_delbefore1():
188: * Delete the character before the cursor, do not yank
189: */
190: protected void
191: c_delbefore1(EditLine *el)
192: {
1.28 christos 193: Char *cp;
1.22 mycroft 194:
195: for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++)
196: *cp = cp[1];
197:
198: el->el_line.lastchar--;
199: }
200:
201:
1.1 cgd 202: /* ce__isword():
203: * Return if p is part of a word according to emacs
204: */
205: protected int
1.41 christos 206: ce__isword(wint_t p)
1.1 cgd 207: {
1.51 ! christos 208: return iswalnum(p) || wcschr(L"*?_-.[]~=", p) != NULL;
1.1 cgd 209: }
210:
211:
212: /* cv__isword():
213: * Return if p is part of a word according to vi
214: */
215: protected int
1.41 christos 216: cv__isword(wint_t p)
1.1 cgd 217: {
1.50 christos 218: if (iswalnum(p) || p == L'_')
1.17 christos 219: return 1;
1.50 christos 220: if (iswgraph(p))
1.17 christos 221: return 2;
222: return 0;
1.16 christos 223: }
224:
225:
226: /* cv__isWord():
227: * Return if p is part of a big word according to vi
228: */
229: protected int
1.41 christos 230: cv__isWord(wint_t p)
1.16 christos 231: {
1.50 christos 232: return !iswspace(p);
1.1 cgd 233: }
234:
235:
236: /* c__prev_word():
237: * Find the previous word
238: */
1.28 christos 239: protected Char *
1.41 christos 240: c__prev_word(Char *p, Char *low, int n, int (*wtest)(wint_t))
1.9 lukem 241: {
242: p--;
243:
244: while (n--) {
1.28 christos 245: while ((p >= low) && !(*wtest)(*p))
1.9 lukem 246: p--;
1.28 christos 247: while ((p >= low) && (*wtest)(*p))
1.9 lukem 248: p--;
249: }
250:
251: /* cp now points to one character before the word */
252: p++;
253: if (p < low)
254: p = low;
255: /* cp now points where we want it */
1.32 christos 256: return p;
1.1 cgd 257: }
258:
259:
260: /* c__next_word():
261: * Find the next word
262: */
1.28 christos 263: protected Char *
1.41 christos 264: c__next_word(Char *p, Char *high, int n, int (*wtest)(wint_t))
1.9 lukem 265: {
266: while (n--) {
1.28 christos 267: while ((p < high) && !(*wtest)(*p))
1.9 lukem 268: p++;
1.28 christos 269: while ((p < high) && (*wtest)(*p))
1.9 lukem 270: p++;
271: }
272: if (p > high)
273: p = high;
274: /* p now points where we want it */
1.32 christos 275: return p;
1.1 cgd 276: }
277:
278: /* cv_next_word():
279: * Find the next word vi style
280: */
1.28 christos 281: protected Char *
1.41 christos 282: cv_next_word(EditLine *el, Char *p, Char *high, int n, int (*wtest)(wint_t))
1.9 lukem 283: {
284: int test;
285:
286: while (n--) {
1.28 christos 287: test = (*wtest)(*p);
288: while ((p < high) && (*wtest)(*p) == test)
1.9 lukem 289: p++;
290: /*
291: * vi historically deletes with cw only the word preserving the
292: * trailing whitespace! This is not what 'w' does..
293: */
1.16 christos 294: if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT))
1.50 christos 295: while ((p < high) && iswspace(*p))
1.9 lukem 296: p++;
297: }
1.1 cgd 298:
1.9 lukem 299: /* p now points where we want it */
300: if (p > high)
1.32 christos 301: return high;
1.9 lukem 302: else
1.32 christos 303: return p;
1.1 cgd 304: }
305:
306:
307: /* cv_prev_word():
308: * Find the previous word vi style
309: */
1.28 christos 310: protected Char *
1.41 christos 311: cv_prev_word(Char *p, Char *low, int n, int (*wtest)(wint_t))
1.1 cgd 312: {
1.9 lukem 313: int test;
1.1 cgd 314:
1.16 christos 315: p--;
1.9 lukem 316: while (n--) {
1.50 christos 317: while ((p > low) && iswspace(*p))
1.16 christos 318: p--;
1.28 christos 319: test = (*wtest)(*p);
320: while ((p >= low) && (*wtest)(*p) == test)
1.9 lukem 321: p--;
322: }
1.16 christos 323: p++;
1.1 cgd 324:
1.9 lukem 325: /* p now points where we want it */
326: if (p < low)
1.32 christos 327: return low;
1.9 lukem 328: else
1.32 christos 329: return p;
1.1 cgd 330: }
331:
332:
333: /* cv_delfini():
334: * Finish vi delete action
335: */
336: protected void
1.9 lukem 337: cv_delfini(EditLine *el)
1.1 cgd 338: {
1.9 lukem 339: int size;
1.17 christos 340: int action = el->el_chared.c_vcmd.action;
1.1 cgd 341:
1.17 christos 342: if (action & INSERT)
1.9 lukem 343: el->el_map.current = el->el_map.key;
1.1 cgd 344:
1.9 lukem 345: if (el->el_chared.c_vcmd.pos == 0)
1.17 christos 346: /* sanity */
1.9 lukem 347: return;
348:
1.27 christos 349: size = (int)(el->el_line.cursor - el->el_chared.c_vcmd.pos);
1.17 christos 350: if (size == 0)
351: size = 1;
1.16 christos 352: el->el_line.cursor = el->el_chared.c_vcmd.pos;
1.17 christos 353: if (action & YANK) {
354: if (size > 0)
355: cv_yank(el, el->el_line.cursor, size);
356: else
357: cv_yank(el, el->el_line.cursor + size, -size);
1.9 lukem 358: } else {
1.17 christos 359: if (size > 0) {
360: c_delafter(el, size);
361: re_refresh_cursor(el);
362: } else {
363: c_delbefore(el, -size);
364: el->el_line.cursor += size;
365: }
1.9 lukem 366: }
1.17 christos 367: el->el_chared.c_vcmd.action = NOP;
1.1 cgd 368: }
369:
370:
371: /* cv__endword():
372: * Go to the end of this word according to vi
373: */
1.28 christos 374: protected Char *
1.41 christos 375: cv__endword(Char *p, Char *high, int n, int (*wtest)(wint_t))
1.9 lukem 376: {
1.16 christos 377: int test;
378:
1.9 lukem 379: p++;
1.1 cgd 380:
1.9 lukem 381: while (n--) {
1.50 christos 382: while ((p < high) && iswspace(*p))
1.9 lukem 383: p++;
384:
1.28 christos 385: test = (*wtest)(*p);
386: while ((p < high) && (*wtest)(*p) == test)
1.16 christos 387: p++;
1.9 lukem 388: }
389: p--;
1.32 christos 390: return p;
1.1 cgd 391: }
392:
393: /* ch_init():
394: * Initialize the character editor
395: */
396: protected int
1.9 lukem 397: ch_init(EditLine *el)
1.1 cgd 398: {
1.24 christos 399: c_macro_t *ma = &el->el_chared.c_macro;
400:
1.28 christos 401: el->el_line.buffer = el_malloc(EL_BUFSIZ *
402: sizeof(*el->el_line.buffer));
1.11 christos 403: if (el->el_line.buffer == NULL)
1.32 christos 404: return -1;
1.11 christos 405:
1.28 christos 406: (void) memset(el->el_line.buffer, 0, EL_BUFSIZ *
407: sizeof(*el->el_line.buffer));
1.9 lukem 408: el->el_line.cursor = el->el_line.buffer;
409: el->el_line.lastchar = el->el_line.buffer;
1.16 christos 410: el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE];
1.9 lukem 411:
1.28 christos 412: el->el_chared.c_undo.buf = el_malloc(EL_BUFSIZ *
413: sizeof(*el->el_chared.c_undo.buf));
1.11 christos 414: if (el->el_chared.c_undo.buf == NULL)
1.32 christos 415: return -1;
1.28 christos 416: (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ *
417: sizeof(*el->el_chared.c_undo.buf));
1.16 christos 418: el->el_chared.c_undo.len = -1;
419: el->el_chared.c_undo.cursor = 0;
1.28 christos 420: el->el_chared.c_redo.buf = el_malloc(EL_BUFSIZ *
421: sizeof(*el->el_chared.c_redo.buf));
1.17 christos 422: if (el->el_chared.c_redo.buf == NULL)
1.32 christos 423: return -1;
1.17 christos 424: el->el_chared.c_redo.pos = el->el_chared.c_redo.buf;
425: el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ;
426: el->el_chared.c_redo.cmd = ED_UNASSIGNED;
1.9 lukem 427:
428: el->el_chared.c_vcmd.action = NOP;
429: el->el_chared.c_vcmd.pos = el->el_line.buffer;
430:
1.28 christos 431: el->el_chared.c_kill.buf = el_malloc(EL_BUFSIZ *
432: sizeof(*el->el_chared.c_kill.buf));
1.11 christos 433: if (el->el_chared.c_kill.buf == NULL)
1.32 christos 434: return -1;
1.28 christos 435: (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ *
436: sizeof(*el->el_chared.c_kill.buf));
1.9 lukem 437: el->el_chared.c_kill.mark = el->el_line.buffer;
438: el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
1.29 christos 439: el->el_chared.c_resizefun = NULL;
440: el->el_chared.c_resizearg = NULL;
1.40 christos 441: el->el_chared.c_aliasfun = NULL;
442: el->el_chared.c_aliasarg = NULL;
1.9 lukem 443:
444: el->el_map.current = el->el_map.key;
445:
446: el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
447: el->el_state.doingarg = 0;
448: el->el_state.metanext = 0;
449: el->el_state.argument = 1;
450: el->el_state.lastcmd = ED_UNASSIGNED;
451:
1.24 christos 452: ma->level = -1;
453: ma->offset = 0;
1.28 christos 454: ma->macro = el_malloc(EL_MAXMACRO * sizeof(*ma->macro));
1.24 christos 455: if (ma->macro == NULL)
1.32 christos 456: return -1;
457: return 0;
1.1 cgd 458: }
459:
460: /* ch_reset():
461: * Reset the character editor
462: */
463: protected void
1.24 christos 464: ch_reset(EditLine *el, int mclear)
1.1 cgd 465: {
1.9 lukem 466: el->el_line.cursor = el->el_line.buffer;
467: el->el_line.lastchar = el->el_line.buffer;
1.1 cgd 468:
1.16 christos 469: el->el_chared.c_undo.len = -1;
470: el->el_chared.c_undo.cursor = 0;
1.1 cgd 471:
1.9 lukem 472: el->el_chared.c_vcmd.action = NOP;
473: el->el_chared.c_vcmd.pos = el->el_line.buffer;
1.1 cgd 474:
1.9 lukem 475: el->el_chared.c_kill.mark = el->el_line.buffer;
1.1 cgd 476:
1.9 lukem 477: el->el_map.current = el->el_map.key;
1.1 cgd 478:
1.9 lukem 479: el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
480: el->el_state.doingarg = 0;
481: el->el_state.metanext = 0;
482: el->el_state.argument = 1;
483: el->el_state.lastcmd = ED_UNASSIGNED;
1.1 cgd 484:
1.25 christos 485: el->el_history.eventno = 0;
486:
1.24 christos 487: if (mclear)
488: ch__clearmacro(el);
489: }
1.1 cgd 490:
1.24 christos 491: private void
1.27 christos 492: ch__clearmacro(EditLine *el)
1.24 christos 493: {
494: c_macro_t *ma = &el->el_chared.c_macro;
495: while (ma->level >= 0)
1.31 christos 496: el_free(ma->macro[ma->level--]);
1.1 cgd 497: }
498:
1.12 jdolecek 499: /* ch_enlargebufs():
500: * Enlarge line buffer to be able to hold twice as much characters.
501: * Returns 1 if successful, 0 if not.
502: */
503: protected int
1.27 christos 504: ch_enlargebufs(EditLine *el, size_t addlen)
1.12 jdolecek 505: {
1.13 lukem 506: size_t sz, newsz;
1.28 christos 507: Char *newbuffer, *oldbuf, *oldkbuf;
1.12 jdolecek 508:
1.35 christos 509: sz = (size_t)(el->el_line.limit - el->el_line.buffer + EL_LEAVE);
1.13 lukem 510: newsz = sz * 2;
511: /*
512: * If newly required length is longer than current buffer, we need
513: * to make the buffer big enough to hold both old and new stuff.
514: */
515: if (addlen > sz) {
516: while(newsz - sz < addlen)
517: newsz *= 2;
518: }
519:
520: /*
521: * Reallocate line buffer.
522: */
1.28 christos 523: newbuffer = el_realloc(el->el_line.buffer, newsz * sizeof(*newbuffer));
1.13 lukem 524: if (!newbuffer)
525: return 0;
526:
527: /* zero the newly added memory, leave old data in */
1.28 christos 528: (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
1.47 christos 529:
1.13 lukem 530: oldbuf = el->el_line.buffer;
531:
532: el->el_line.buffer = newbuffer;
533: el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
534: el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
1.16 christos 535: /* don't set new size until all buffers are enlarged */
536: el->el_line.limit = &newbuffer[sz - EL_LEAVE];
1.13 lukem 537:
538: /*
539: * Reallocate kill buffer.
540: */
1.31 christos 541: newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz *
542: sizeof(*newbuffer));
1.13 lukem 543: if (!newbuffer)
544: return 0;
1.12 jdolecek 545:
1.13 lukem 546: /* zero the newly added memory, leave old data in */
1.28 christos 547: (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
1.12 jdolecek 548:
1.13 lukem 549: oldkbuf = el->el_chared.c_kill.buf;
1.12 jdolecek 550:
1.13 lukem 551: el->el_chared.c_kill.buf = newbuffer;
552: el->el_chared.c_kill.last = newbuffer +
1.12 jdolecek 553: (el->el_chared.c_kill.last - oldkbuf);
1.13 lukem 554: el->el_chared.c_kill.mark = el->el_line.buffer +
1.12 jdolecek 555: (el->el_chared.c_kill.mark - oldbuf);
556:
1.13 lukem 557: /*
558: * Reallocate undo buffer.
559: */
1.28 christos 560: newbuffer = el_realloc(el->el_chared.c_undo.buf,
561: newsz * sizeof(*newbuffer));
1.13 lukem 562: if (!newbuffer)
563: return 0;
564:
565: /* zero the newly added memory, leave old data in */
1.28 christos 566: (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
1.16 christos 567: el->el_chared.c_undo.buf = newbuffer;
1.13 lukem 568:
1.28 christos 569: newbuffer = el_realloc(el->el_chared.c_redo.buf,
570: newsz * sizeof(*newbuffer));
1.16 christos 571: if (!newbuffer)
572: return 0;
1.17 christos 573: el->el_chared.c_redo.pos = newbuffer +
574: (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf);
575: el->el_chared.c_redo.lim = newbuffer +
576: (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf);
577: el->el_chared.c_redo.buf = newbuffer;
1.47 christos 578:
1.13 lukem 579: if (!hist_enlargebuf(el, sz, newsz))
580: return 0;
1.12 jdolecek 581:
1.16 christos 582: /* Safe to set enlarged buffer size */
1.21 christos 583: el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE];
1.29 christos 584: if (el->el_chared.c_resizefun)
585: (*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg);
1.13 lukem 586: return 1;
1.12 jdolecek 587: }
1.1 cgd 588:
589: /* ch_end():
590: * Free the data structures used by the editor
591: */
592: protected void
1.9 lukem 593: ch_end(EditLine *el)
1.1 cgd 594: {
1.31 christos 595: el_free(el->el_line.buffer);
1.9 lukem 596: el->el_line.buffer = NULL;
597: el->el_line.limit = NULL;
1.31 christos 598: el_free(el->el_chared.c_undo.buf);
1.9 lukem 599: el->el_chared.c_undo.buf = NULL;
1.31 christos 600: el_free(el->el_chared.c_redo.buf);
1.17 christos 601: el->el_chared.c_redo.buf = NULL;
602: el->el_chared.c_redo.pos = NULL;
603: el->el_chared.c_redo.lim = NULL;
604: el->el_chared.c_redo.cmd = ED_UNASSIGNED;
1.31 christos 605: el_free(el->el_chared.c_kill.buf);
1.9 lukem 606: el->el_chared.c_kill.buf = NULL;
1.24 christos 607: ch_reset(el, 1);
1.31 christos 608: el_free(el->el_chared.c_macro.macro);
1.9 lukem 609: el->el_chared.c_macro.macro = NULL;
1.1 cgd 610: }
611:
612:
613: /* el_insertstr():
614: * Insert string at cursorI
615: */
616: public int
1.51 ! christos 617: el_winsertstr(EditLine *el, const Char *s)
1.9 lukem 618: {
1.14 christos 619: size_t len;
1.9 lukem 620:
1.51 ! christos 621: if (s == NULL || (len = wcslen(s)) == 0)
1.32 christos 622: return -1;
1.12 jdolecek 623: if (el->el_line.lastchar + len >= el->el_line.limit) {
624: if (!ch_enlargebufs(el, len))
1.32 christos 625: return -1;
1.12 jdolecek 626: }
1.9 lukem 627:
1.14 christos 628: c_insert(el, (int)len);
1.9 lukem 629: while (*s)
630: *el->el_line.cursor++ = *s++;
1.32 christos 631: return 0;
1.1 cgd 632: }
633:
634:
635: /* el_deletestr():
636: * Delete num characters before the cursor
637: */
638: public void
1.9 lukem 639: el_deletestr(EditLine *el, int n)
640: {
641: if (n <= 0)
642: return;
643:
644: if (el->el_line.cursor < &el->el_line.buffer[n])
645: return;
646:
647: c_delbefore(el, n); /* delete before dot */
648: el->el_line.cursor -= n;
649: if (el->el_line.cursor < el->el_line.buffer)
650: el->el_line.cursor = el->el_line.buffer;
1.1 cgd 651: }
652:
1.38 christos 653: /* el_cursor():
654: * Move the cursor to the left or the right of the current position
655: */
656: public int
657: el_cursor(EditLine *el, int n)
658: {
659: if (n == 0)
660: goto out;
661:
662: el->el_line.cursor += n;
663:
664: if (el->el_line.cursor < el->el_line.buffer)
665: el->el_line.cursor = el->el_line.buffer;
666: if (el->el_line.cursor > el->el_line.lastchar)
667: el->el_line.cursor = el->el_line.lastchar;
668: out:
1.39 christos 669: return (int)(el->el_line.cursor - el->el_line.buffer);
1.38 christos 670: }
671:
1.1 cgd 672: /* c_gets():
673: * Get a string
674: */
675: protected int
1.28 christos 676: c_gets(EditLine *el, Char *buf, const Char *prompt)
1.9 lukem 677: {
1.48 christos 678: wchar_t wch;
1.27 christos 679: ssize_t len;
1.48 christos 680: Char *cp = el->el_line.buffer, ch;
1.18 christos 681:
682: if (prompt) {
1.51 ! christos 683: len = (ssize_t)wcslen(prompt);
1.35 christos 684: (void)memcpy(cp, prompt, (size_t)len * sizeof(*cp));
1.18 christos 685: cp += len;
686: }
687: len = 0;
688:
689: for (;;) {
690: el->el_line.cursor = cp;
691: *cp = ' ';
692: el->el_line.lastchar = cp + 1;
693: re_refresh(el);
694:
1.48 christos 695: if (el_wgetc(el, &wch) != 1) {
1.18 christos 696: ed_end_of_file(el, 0);
697: len = -1;
698: break;
699: }
1.48 christos 700: ch = (Char)wch;
1.1 cgd 701:
1.9 lukem 702: switch (ch) {
1.18 christos 703:
1.48 christos 704: case L'\b': /* Delete and backspace */
1.9 lukem 705: case 0177:
1.27 christos 706: if (len == 0) {
1.18 christos 707: len = -1;
708: break;
1.9 lukem 709: }
1.49 christos 710: len--;
1.18 christos 711: cp--;
712: continue;
1.9 lukem 713:
714: case 0033: /* ESC */
1.48 christos 715: case L'\r': /* Newline */
716: case L'\n':
1.18 christos 717: buf[len] = ch;
1.9 lukem 718: break;
719:
720: default:
1.34 christos 721: if (len >= (ssize_t)(EL_BUFSIZ - 16))
1.30 christos 722: terminal_beep(el);
1.9 lukem 723: else {
724: buf[len++] = ch;
1.18 christos 725: *cp++ = ch;
1.9 lukem 726: }
1.18 christos 727: continue;
1.9 lukem 728: }
1.18 christos 729: break;
1.9 lukem 730: }
1.18 christos 731:
732: el->el_line.buffer[0] = '\0';
733: el->el_line.lastchar = el->el_line.buffer;
734: el->el_line.cursor = el->el_line.buffer;
1.27 christos 735: return (int)len;
1.1 cgd 736: }
737:
738:
739: /* c_hpos():
740: * Return the current horizontal position of the cursor
741: */
742: protected int
1.9 lukem 743: c_hpos(EditLine *el)
1.1 cgd 744: {
1.28 christos 745: Char *ptr;
1.1 cgd 746:
1.9 lukem 747: /*
748: * Find how many characters till the beginning of this line.
749: */
750: if (el->el_line.cursor == el->el_line.buffer)
1.32 christos 751: return 0;
1.9 lukem 752: else {
753: for (ptr = el->el_line.cursor - 1;
754: ptr >= el->el_line.buffer && *ptr != '\n';
755: ptr--)
756: continue;
1.27 christos 757: return (int)(el->el_line.cursor - ptr - 1);
1.9 lukem 758: }
1.1 cgd 759: }
1.29 christos 760:
761: protected int
762: ch_resizefun(EditLine *el, el_zfunc_t f, void *a)
763: {
764: el->el_chared.c_resizefun = f;
765: el->el_chared.c_resizearg = a;
766: return 0;
767: }
1.40 christos 768:
769: protected int
770: ch_aliasfun(EditLine *el, el_afunc_t f, void *a)
771: {
772: el->el_chared.c_aliasfun = f;
773: el->el_chared.c_aliasarg = a;
774: return 0;
775: }
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