vi.c

   1 /*
   2  * NEATVI Editor
   3  *
   4  * Copyright (C) 2015-2016 Ali Gholami Rudi <ali at rudi dot ir>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #include <ctype.h>
  19 #include <fcntl.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include "vi.h"
  24
  25 static char vi_msg[EXLEN];      /* current message */
  26 static char vi_charlast[8];     /* the last character searched via f, t, F, or T */
  27 static int vi_charcmd;          /* the character finding command */
  28 static int vi_arg1, vi_arg2;    /* the first and second arguments */
  29 static int vi_ybuf;             /* current yank buffer */
  30 static int vi_pcol;             /* the column requested by | command */
  31 static int vi_printed;          /* ex_print() calls since the last command */
  32 static int vi_scroll;           /* scroll amount for ^f and ^d*/
  33 static int vi_soset, vi_so;     /* search offset; 1 in "/kw/1" */
  34
  35 static void vi_wait(void)
  36 {
  37         if (vi_printed > 1) {
  38                 free(ex_read("[enter to continue]"));
  39                 vi_msg[0] = '\0';
  40         }
  41         vi_printed = 0;
  42 }
  43
  44 static void vi_drawmsg(void)
  45 {
  46         int oleft = xleft;
  47         xleft = 0;
  48         led_print(vi_msg, xrows);
  49         vi_msg[0] = '\0';
  50         xleft = oleft;
  51 }
  52
  53 static void vi_drawrow(int row)
  54 {
  55         char *s = lbuf_get(xb, row);
  56         led_print(s ? s : (row ? "~" : ""), row - xtop);
  57 }
  58
  59 /* redraw the screen */
  60 static void vi_drawagain(int xcol, int lineonly)
  61 {
  62         int i;
  63         term_record();
  64         for (i = xtop; i < xtop + xrows; i++)
  65                 if (!lineonly || i == xrow)
  66                         vi_drawrow(i);
  67         vi_drawmsg();
  68         term_pos(xrow, led_pos(lbuf_get(xb, i), xcol));
  69         term_commit();
  70 }
  71
  72 /* update the screen */
  73 static void vi_drawupdate(int xcol, int otop)
  74 {
  75         int i;
  76         if (otop != xtop) {
  77                 term_record();
  78                 term_pos(0, 0);
  79                 term_room(otop - xtop);
  80                 if (xtop > otop) {
  81                         int n = MIN(xtop - otop, xrows);
  82                         for (i = 0; i < n; i++)
  83                                 vi_drawrow(xtop + xrows - n + i);
  84                 } else {
  85                         int n = MIN(otop - xtop, xrows);
  86                         for (i = 0; i < n; i++)
  87                                 vi_drawrow(xtop + i);
  88                 }
  89                 term_pos(xrow, led_pos(lbuf_get(xb, i), xcol));
  90                 term_commit();
  91         }
  92         vi_drawmsg();
  93         term_pos(xrow, led_pos(lbuf_get(xb, i), xcol));
  94 }
  95
  96 /* update the screen by removing lines r1 to r2 before an input command */
  97 static void vi_drawrm(int r1, int r2, int newln)
  98 {
  99         r1 = MIN(MAX(r1, xtop), xtop + xrows);
 100         r2 = MIN(MAX(r2, xtop), xtop + xrows);
 101         term_pos(r1 - xtop, 0);
 102         term_room(r1 - r2 + newln);
 103 }
 104
 105 static int vi_buf[128];
 106 static int vi_buflen;
 107
 108 static int vi_read(void)
 109 {
 110         return vi_buflen ? vi_buf[--vi_buflen] : term_read();
 111 }
 112
 113 static void vi_back(int c)
 114 {
 115         if (vi_buflen < sizeof(vi_buf))
 116                 vi_buf[vi_buflen++] = c;
 117 }
 118
 119 static char *vi_char(void)
 120 {
 121         return led_read(ex_kmap());
 122 }
 123
 124 static char *vi_prompt(char *msg, char **kmap)
 125 {
 126         char *r, *s;
 127         term_pos(xrows, led_pos(msg, 0));
 128         term_kill();
 129         s = led_prompt(msg, "", kmap);
 130         if (!s)
 131                 return NULL;
 132         r = uc_dup(strlen(s) >= strlen(msg) ? s + strlen(msg) : s);
 133         free(s);
 134         return r;
 135 }
 136
 137 /* read an ex input line */
 138 char *ex_read(char *msg)
 139 {
 140         struct sbuf *sb;
 141         char c;
 142         if (xled) {
 143                 char *s = led_prompt(msg, "", ex_kmap());
 144                 if (s)
 145                         term_chr('\n');
 146                 return s;
 147         }
 148         sb = sbuf_make();
 149         while ((c = getchar()) != EOF && c != '\n')
 150                 sbuf_chr(sb, c);
 151         if (c == EOF) {
 152                 sbuf_free(sb);
 153                 return NULL;
 154         }
 155         return sbuf_done(sb);
 156 }
 157
 158 /* show an ex message */
 159 void ex_show(char *msg)
 160 {
 161         if (xvis) {
 162                 snprintf(vi_msg, sizeof(vi_msg), "%s", msg);
 163         } else if (xled) {
 164                 led_print(msg, -1);
 165                 term_chr('\n');
 166         } else {
 167                 printf("%s", msg);
 168         }
 169 }
 170
 171 /* print an ex output line */
 172 void ex_print(char *line)
 173 {
 174         if (xvis) {
 175                 vi_printed += line ? 1 : 2;
 176                 if (line)
 177                         snprintf(vi_msg, sizeof(vi_msg), "%s", line);
 178                 if (line)
 179                         led_print(line, -1);
 180                 term_chr('\n');
 181         } else {
 182                 if (line)
 183                         ex_show(line);
 184         }
 185 }
 186
 187 static int vi_yankbuf(void)
 188 {
 189         int c = vi_read();
 190         if (c == '"')
 191                 return vi_read();
 192         vi_back(c);
 193         return 0;
 194 }
 195
 196 static int vi_prefix(void)
 197 {
 198         int n = 0;
 199         int c = vi_read();
 200         if ((c >= '1' && c <= '9')) {
 201                 while (isdigit(c)) {
 202                         n = n * 10 + c - '0';
 203                         c = vi_read();
 204                 }
 205         }
 206         vi_back(c);
 207         return n;
 208 }
 209
 210 static int vi_col2off(struct lbuf *lb, int row, int col)
 211 {
 212         char *ln = lbuf_get(lb, row);
 213         return ln ? ren_off(ln, col) : 0;
 214 }
 215
 216 static int vi_off2col(struct lbuf *lb, int row, int off)
 217 {
 218         char *ln = lbuf_get(lb, row);
 219         return ln ? ren_pos(ln, off) : 0;
 220 }
 221
 222 static int vi_nextoff(struct lbuf *lb, int dir, int *row, int *off)
 223 {
 224         int o = *off + dir;
 225         if (o < 0 || !lbuf_get(lb, *row) || o >= uc_slen(lbuf_get(lb, *row)))
 226                 return 1;
 227         *off = o;
 228         return 0;
 229 }
 230
 231 static int vi_nextcol(struct lbuf *lb, int dir, int *row, int *off)
 232 {
 233         char *ln = lbuf_get(lb, *row);
 234         int col = ln ? ren_pos(ln, *off) : 0;
 235         int o = ln ? ren_next(ln, col, dir) : -1;
 236         if (o < 0)
 237                 return -1;
 238         *off = ren_off(ln, o);
 239         return 0;
 240 }
 241
 242 static int vi_findchar(struct lbuf *lb, char *cs, int cmd, int n, int *row, int *off)
 243 {
 244         strcpy(vi_charlast, cs);
 245         vi_charcmd = cmd;
 246         return lbuf_findchar(lb, cs, cmd, n, row, off);
 247 }
 248
 249 static int vi_search(int cmd, int cnt, int *row, int *off)
 250 {
 251         char *kwd;
 252         int r = *row;
 253         int o = *off;
 254         int failed = 0;
 255         int len = 0;
 256         int i, dir;
 257         if (cmd == '/' || cmd == '?') {
 258                 char sign[4] = {cmd};
 259                 struct sbuf *sb;
 260                 char *kw = vi_prompt(sign, ex_kmap());
 261                 char *re;
 262                 if (!kw)
 263                         return 1;
 264                 sb = sbuf_make();
 265                 sbuf_chr(sb, cmd);
 266                 sbuf_str(sb, kw);
 267                 free(kw);
 268                 kw = sbuf_buf(sb);
 269                 if ((re = re_read(&kw))) {
 270                         ex_kwdset(re[0] ? re : NULL, cmd == '/' ? +1 : -1);
 271                         while (isspace(*kw))
 272                                 kw++;
 273                         vi_soset = !!kw[0];
 274                         vi_so = atoi(kw);
 275                         free(re);
 276                 }
 277                 sbuf_free(sb);
 278         }
 279         if (!lbuf_len(xb) || ex_kwd(&kwd, &dir))
 280                 return 1;
 281         dir = cmd == 'N' ? -dir : dir;
 282         o = *off;
 283         for (i = 0; i < cnt; i++) {
 284                 if (lbuf_search(xb, kwd, dir, &r, &o, &len)) {
 285                         failed = 1;
 286                         break;
 287                 }
 288                 if (i + 1 < cnt && cmd == '/')
 289                         o += len;
 290         }
 291         if (!failed) {
 292                 *row = r;
 293                 *off = o;
 294                 if (vi_soset) {
 295                         *off = -1;
 296                         if (*row + vi_so < 0 || *row + vi_so >= lbuf_len(xb))
 297                                 failed = 1;
 298                         else
 299                                 *row += vi_so;
 300                 }
 301         }
 302         if (failed)
 303                 snprintf(vi_msg, sizeof(vi_msg), "\"%s\" not found\n", kwd);
 304         return failed;
 305 }
 306
 307 /* read a line motion */
 308 static int vi_motionln(int *row, int cmd)
 309 {
 310         int cnt = (vi_arg1 ? vi_arg1 : 1) * (vi_arg2 ? vi_arg2 : 1);
 311         int c = vi_read();
 312         int mark, mark_row, mark_off;
 313         switch (c) {
 314         case '\n':
 315         case '+':
 316                 *row = MIN(*row + cnt, lbuf_len(xb) - 1);
 317                 break;
 318         case '-':
 319                 *row = MAX(*row - cnt, 0);
 320                 break;
 321         case '_':
 322                 *row = MIN(*row + cnt - 1, lbuf_len(xb) - 1);
 323                 break;
 324         case '\'':
 325                 if ((mark = vi_read()) <= 0)
 326                         return -1;
 327                 if (lbuf_jump(xb, mark, &mark_row, &mark_off))
 328                         return -1;
 329                 *row = mark_row;
 330                 break;
 331         case 'j':
 332                 *row = MIN(*row + cnt, lbuf_len(xb) - 1);
 333                 break;
 334         case 'k':
 335                 *row = MAX(*row - cnt, 0);
 336                 break;
 337         case 'G':
 338                 *row = (vi_arg1 || vi_arg2) ? cnt - 1 : lbuf_len(xb) - 1;
 339                 break;
 340         case 'H':
 341                 if (lbuf_len(xb))
 342                         *row = MIN(xtop + cnt - 1, lbuf_len(xb) - 1);
 343                 else
 344                         *row = 0;
 345                 break;
 346         case 'L':
 347                 if (lbuf_len(xb))
 348                         *row = MIN(xtop + xrows - 1 - cnt + 1, lbuf_len(xb) - 1);
 349                 else
 350                         *row = 0;
 351                 break;
 352         case 'M':
 353                 if (lbuf_len(xb))
 354                         *row = MIN(xtop + xrows / 2, lbuf_len(xb) - 1);
 355                 else
 356                         *row = 0;
 357                 break;
 358         default:
 359                 if (c == cmd) {
 360                         *row = MAX(0, MIN(*row + cnt - 1, lbuf_len(xb) - 1));
 361                         break;
 362                 }
 363                 if (c == '%' && (vi_arg1 || vi_arg2)) {
 364                         if (cnt > 100)
 365                                 return -1;
 366                         *row = MAX(0, lbuf_len(xb) - 1) * cnt / 100;
 367                         break;
 368                 }
 369                 vi_back(c);
 370                 return 0;
 371         }
 372         return c;
 373 }
 374
 375 static char *vi_curword(struct lbuf *lb, int row, int off)
 376 {
 377         struct sbuf *sb;
 378         char *ln = lbuf_get(lb, row);
 379         char *beg, *end;
 380         if (!ln)
 381                 return NULL;
 382         beg = uc_chr(ln, ren_noeol(ln, off));
 383         end = beg;
 384         while (*end && uc_kind(end) == 1)
 385                 end = uc_next(end);
 386         while (beg > ln && uc_kind(uc_beg(ln, beg - 1)) == 1)
 387                 beg = uc_beg(ln, beg - 1);
 388         if (beg >= end)
 389                 return NULL;
 390         sb = sbuf_make();
 391         sbuf_str(sb, "\\<");
 392         sbuf_mem(sb, beg, end - beg);
 393         sbuf_str(sb, "\\>");
 394         return sbuf_done(sb);
 395 }
 396
 397 /* read a motion */
 398 static int vi_motion(int *row, int *off)
 399 {
 400         int cnt = (vi_arg1 ? vi_arg1 : 1) * (vi_arg2 ? vi_arg2 : 1);
 401         char *ln = lbuf_get(xb, *row);
 402         int dir = dir_context(ln ? ln : "");
 403         int mark, mark_row, mark_off;
 404         char *cs;
 405         int mv;
 406         int i;
 407         if ((mv = vi_motionln(row, 0))) {
 408                 *off = -1;
 409                 return mv;
 410         }
 411         mv = vi_read();
 412         switch (mv) {
 413         case 'f':
 414                 if (!(cs = vi_char()))
 415                         return -1;
 416                 if (vi_findchar(xb, cs, mv, cnt, row, off))
 417                         return -1;
 418                 break;
 419         case 'F':
 420                 if (!(cs = vi_char()))
 421                         return -1;
 422                 if (vi_findchar(xb, cs, mv, cnt, row, off))
 423                         return -1;
 424                 break;
 425         case ';':
 426                 if (!vi_charlast[0])
 427                         return -1;
 428                 if (vi_findchar(xb, vi_charlast, vi_charcmd, cnt, row, off))
 429                         return -1;
 430                 break;
 431         case ',':
 432                 if (!vi_charlast[0])
 433                         return -1;
 434                 if (vi_findchar(xb, vi_charlast, vi_charcmd, -cnt, row, off))
 435                         return -1;
 436                 break;
 437         case 'h':
 438                 for (i = 0; i < cnt; i++)
 439                         if (vi_nextcol(xb, -1 * dir, row, off))
 440                                 break;
 441                 break;
 442         case 'l':
 443                 for (i = 0; i < cnt; i++)
 444                         if (vi_nextcol(xb, +1 * dir, row, off))
 445                                 break;
 446                 break;
 447         case 't':
 448                 if (!(cs = vi_char()))
 449                         return -1;
 450                 if (vi_findchar(xb, cs, mv, cnt, row, off))
 451                         return -1;
 452                 break;
 453         case 'T':
 454                 if (!(cs = vi_char()))
 455                         return -1;
 456                 if (vi_findchar(xb, cs, mv, cnt, row, off))
 457                         return -1;
 458                 break;
 459         case 'B':
 460                 for (i = 0; i < cnt; i++)
 461                         if (lbuf_wordend(xb, 1, -1, row, off))
 462                                 break;
 463                 break;
 464         case 'E':
 465                 for (i = 0; i < cnt; i++)
 466                         if (lbuf_wordend(xb, 1, +1, row, off))
 467                                 break;
 468                 break;
 469         case 'W':
 470                 for (i = 0; i < cnt; i++)
 471                         if (lbuf_wordbeg(xb, 1, +1, row, off))
 472                                 break;
 473                 break;
 474         case 'b':
 475                 for (i = 0; i < cnt; i++)
 476                         if (lbuf_wordend(xb, 0, -1, row, off))
 477                                 break;
 478                 break;
 479         case 'e':
 480                 for (i = 0; i < cnt; i++)
 481                         if (lbuf_wordend(xb, 0, +1, row, off))
 482                                 break;
 483                 break;
 484         case 'w':
 485                 for (i = 0; i < cnt; i++)
 486                         if (lbuf_wordbeg(xb, 0, +1, row, off))
 487                                 break;
 488                 break;
 489         case '{':
 490                 for (i = 0; i < cnt; i++)
 491                         if (lbuf_paragraphbeg(xb, -1, row, off))
 492                                 break;
 493                 break;
 494         case '}':
 495                 for (i = 0; i < cnt; i++)
 496                         if (lbuf_paragraphbeg(xb, +1, row, off))
 497                                 break;
 498                 break;
 499         case '[':
 500                 if (vi_read() != '[')
 501                         return -1;
 502                 for (i = 0; i < cnt; i++)
 503                         if (lbuf_sectionbeg(xb, -1, row, off))
 504                                 break;
 505                 break;
 506         case ']':
 507                 if (vi_read() != ']')
 508                         return -1;
 509                 for (i = 0; i < cnt; i++)
 510                         if (lbuf_sectionbeg(xb, +1, row, off))
 511                                 break;
 512                 break;
 513         case '0':
 514                 *off = 0;
 515                 break;
 516         case '^':
 517                 *off = lbuf_indents(xb, *row);
 518                 break;
 519         case '$':
 520                 *off = lbuf_eol(xb, *row);
 521                 break;
 522         case '|':
 523                 *off = vi_col2off(xb, *row, cnt - 1);
 524                 vi_pcol = cnt - 1;
 525                 break;
 526         case '/':
 527                 if (vi_search(mv, cnt, row, off))
 528                         return -1;
 529                 break;
 530         case '?':
 531                 if (vi_search(mv, cnt, row, off))
 532                         return -1;
 533                 break;
 534         case 'n':
 535                 if (vi_search(mv, cnt, row, off))
 536                         return -1;
 537                 break;
 538         case 'N':
 539                 if (vi_search(mv, cnt, row, off))
 540                         return -1;
 541                 break;
 542         case TK_CTL('a'):
 543                 if (!(cs = vi_curword(xb, *row, *off)))
 544                         return -1;
 545                 ex_kwdset(cs, +1);
 546                 free(cs);
 547                 if (vi_search('n', cnt, row, off))
 548                         return -1;
 549                 break;
 550         case ' ':
 551                 for (i = 0; i < cnt; i++)
 552                         if (vi_nextoff(xb, +1, row, off))
 553                                 break;
 554                 break;
 555         case 127:
 556         case TK_CTL('h'):
 557                 for (i = 0; i < cnt; i++)
 558                         if (vi_nextoff(xb, -1, row, off))
 559                                 break;
 560                 break;
 561         case '`':
 562                 if ((mark = vi_read()) <= 0)
 563                         return -1;
 564                 if (lbuf_jump(xb, mark, &mark_row, &mark_off))
 565                         return -1;
 566                 *row = mark_row;
 567                 *off = mark_off;
 568                 break;
 569         case '%':
 570                 if (lbuf_pair(xb, row, off))
 571                         return -1;
 572                 break;
 573         default:
 574                 vi_back(mv);
 575                 return 0;
 576         }
 577         return mv;
 578 }
 579
 580 static void swap(int *a, int *b)
 581 {
 582         int t = *a;
 583         *a = *b;
 584         *b = t;
 585 }
 586
 587 static char *lbuf_region(struct lbuf *lb, int r1, int o1, int r2, int o2)
 588 {
 589         struct sbuf *sb;
 590         char *s1, *s2, *s3;
 591         if (r1 == r2)
 592                 return uc_sub(lbuf_get(lb, r1), o1, o2);
 593         sb = sbuf_make();
 594         s1 = uc_sub(lbuf_get(lb, r1), o1, -1);
 595         s3 = uc_sub(lbuf_get(lb, r2), 0, o2);
 596         s2 = lbuf_cp(lb, r1 + 1, r2);
 597         sbuf_str(sb, s1);
 598         sbuf_str(sb, s2);
 599         sbuf_str(sb, s3);
 600         free(s1);
 601         free(s2);
 602         free(s3);
 603         return sbuf_done(sb);
 604 }
 605
 606 static void vi_yank(int r1, int o1, int r2, int o2, int lnmode)
 607 {
 608         char *region;
 609         region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
 610         reg_put(vi_ybuf, region, lnmode);
 611         free(region);
 612         xrow = r1;
 613         xoff = lnmode ? xoff : o1;
 614 }
 615
 616 static void vi_delete(int r1, int o1, int r2, int o2, int lnmode)
 617 {
 618         char *pref, *post;
 619         char *region;
 620         region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
 621         reg_put(vi_ybuf, region, lnmode);
 622         free(region);
 623         pref = lnmode ? uc_dup("") : uc_sub(lbuf_get(xb, r1), 0, o1);
 624         post = lnmode ? uc_dup("\n") : uc_sub(lbuf_get(xb, r2), o2, -1);
 625         if (!lnmode) {
 626                 struct sbuf *sb = sbuf_make();
 627                 sbuf_str(sb, pref);
 628                 sbuf_str(sb, post);
 629                 lbuf_edit(xb, sbuf_buf(sb), r1, r2 + 1);
 630                 sbuf_free(sb);
 631         } else {
 632                 lbuf_edit(xb, NULL, r1, r2 + 1);
 633         }
 634         xrow = r1;
 635         xoff = lnmode ? lbuf_indents(xb, xrow) : o1;
 636         free(pref);
 637         free(post);
 638 }
 639
 640 static int linecount(char *s)
 641 {
 642         int n;
 643         for (n = 0; s; n++)
 644                 if ((s = strchr(s, '\n')))
 645                         s++;
 646         return n;
 647 }
 648
 649 static int charcount(char *text, char *post)
 650 {
 651         int tlen = strlen(text);
 652         int plen = strlen(post);
 653         char *nl = text;
 654         int i;
 655         if (tlen < plen)
 656                 return 0;
 657         for (i = 0; i < tlen - plen; i++)
 658                 if (text[i] == '\n')
 659                         nl = text + i + 1;
 660         return uc_slen(nl) - uc_slen(post);
 661 }
 662
 663 static char *vi_input(char *pref, char *post, int *row, int *off)
 664 {
 665         char *rep = led_input(pref, post, ex_kmap());
 666         if (!rep)
 667                 return NULL;
 668         *row = linecount(rep) - 1;
 669         *off = charcount(rep, post) - 1;
 670         if (*off < 0)
 671                 *off = 0;
 672         return rep;
 673 }
 674
 675 static char *vi_indents(char *ln)
 676 {
 677         struct sbuf *sb = sbuf_make();
 678         while (xai && ln && (*ln == ' ' || *ln == '\t'))
 679                 sbuf_chr(sb, *ln++);
 680         return sbuf_done(sb);
 681 }
 682
 683 static void vi_change(int r1, int o1, int r2, int o2, int lnmode)
 684 {
 685         char *region;
 686         int row, off;
 687         char *rep;
 688         char *pref, *post;
 689         region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
 690         reg_put(vi_ybuf, region, lnmode);
 691         free(region);
 692         pref = lnmode ? vi_indents(lbuf_get(xb, r1)) : uc_sub(lbuf_get(xb, r1), 0, o1);
 693         post = lnmode ? uc_dup("\n") : uc_sub(lbuf_get(xb, r2), o2, -1);
 694         vi_drawrm(r1, r2, 0);
 695         rep = vi_input(pref, post, &row, &off);
 696         if (rep) {
 697                 lbuf_edit(xb, rep, r1, r2 + 1);
 698                 xrow = r1 + row - 1;
 699                 xoff = off;
 700                 free(rep);
 701         }
 702         free(pref);
 703         free(post);
 704 }
 705
 706 static void vi_case(int r1, int o1, int r2, int o2, int lnmode, int cmd)
 707 {
 708         char *pref, *post;
 709         char *region, *s;
 710         region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
 711         s = region;
 712         while (*s) {
 713                 int c = (unsigned char) s[0];
 714                 if (c <= 0x7f) {
 715                         if (cmd == 'u')
 716                                 s[0] = tolower(c);
 717                         if (cmd == 'U')
 718                                 s[0] = toupper(c);
 719                         if (cmd == '~')
 720                                 s[0] = islower(c) ? toupper(c) : tolower(c);
 721                 }
 722                 s = uc_next(s);
 723         }
 724         pref = lnmode ? uc_dup("") : uc_sub(lbuf_get(xb, r1), 0, o1);
 725         post = lnmode ? uc_dup("\n") : uc_sub(lbuf_get(xb, r2), o2, -1);
 726         if (!lnmode) {
 727                 struct sbuf *sb = sbuf_make();
 728                 sbuf_str(sb, pref);
 729                 sbuf_str(sb, region);
 730                 sbuf_str(sb, post);
 731                 lbuf_edit(xb, sbuf_buf(sb), r1, r2 + 1);
 732                 sbuf_free(sb);
 733         } else {
 734                 lbuf_edit(xb, region, r1, r2 + 1);
 735         }
 736         xrow = r2;
 737         xoff = lnmode ? lbuf_indents(xb, r2) : o2;
 738         free(region);
 739         free(pref);
 740         free(post);
 741 }
 742
 743 static void vi_pipe(int r1, int r2)
 744 {
 745         char *text;
 746         char *rep;
 747         char *kmap = NULL;
 748         char *cmd = vi_prompt("!", &kmap);
 749         if (!cmd)
 750                 return;
 751         text = lbuf_cp(xb, r1, r2 + 1);
 752         rep = cmd_pipe(cmd, text, 1, 1);
 753         if (rep)
 754                 lbuf_edit(xb, rep, r1, r2 + 1);
 755         free(cmd);
 756         free(text);
 757         free(rep);
 758 }
 759
 760 static void vi_shift(int r1, int r2, int dir)
 761 {
 762         struct sbuf *sb;
 763         char *ln;
 764         int i;
 765         for (i = r1; i <= r2; i++) {
 766                 if (!(ln = lbuf_get(xb, i)))
 767                         continue;
 768                 sb = sbuf_make();
 769                 if (dir > 0)
 770                         sbuf_chr(sb, '\t');
 771                 else
 772                         ln = ln[0] == ' ' || ln[0] == '\t' ? ln + 1 : ln;
 773                 sbuf_str(sb, ln);
 774                 lbuf_edit(xb, sbuf_buf(sb), i, i + 1);
 775                 sbuf_free(sb);
 776         }
 777         xrow = r1;
 778         xoff = lbuf_indents(xb, xrow);
 779 }
 780
 781 static int vc_motion(int cmd)
 782 {
 783         int r1 = xrow, r2 = xrow;       /* region rows */
 784         int o1 = xoff, o2 = xoff;       /* visual region columns */
 785         int lnmode = 0;                 /* line-based region */
 786         int mv;
 787         vi_arg2 = vi_prefix();
 788         if (vi_arg2 < 0)
 789                 return 1;
 790         o1 = ren_noeol(lbuf_get(xb, r1), o1);
 791         o2 = o1;
 792         if ((mv = vi_motionln(&r2, cmd))) {
 793                 o2 = -1;
 794         } else if (!(mv = vi_motion(&r2, &o2))) {
 795                 vi_read();
 796                 return 1;
 797         }
 798         if (mv < 0)
 799                 return 1;
 800         lnmode = o2 < 0;
 801         if (lnmode) {
 802                 o1 = 0;
 803                 o2 = lbuf_eol(xb, r2);
 804         }
 805         if (r1 > r2) {
 806                 swap(&r1, &r2);
 807                 swap(&o1, &o2);
 808         }
 809         if (r1 == r2 && o1 > o2)
 810                 swap(&o1, &o2);
 811         o1 = ren_noeol(lbuf_get(xb, r1), o1);
 812         if (!lnmode && strchr("fFtTeE%", mv))
 813                 if (o2 < lbuf_eol(xb, r2))
 814                         o2 = ren_noeol(lbuf_get(xb, r2), o2) + 1;
 815         if (cmd == 'y')
 816                 vi_yank(r1, o1, r2, o2, lnmode);
 817         if (cmd == 'd')
 818                 vi_delete(r1, o1, r2, o2, lnmode);
 819         if (cmd == 'c')
 820                 vi_change(r1, o1, r2, o2, lnmode);
 821         if (cmd == '~' || cmd == 'u' || cmd == 'U')
 822                 vi_case(r1, o1, r2, o2, lnmode, cmd);
 823         if (cmd == '!')
 824                 vi_pipe(r1, r2);
 825         if (cmd == '>' || cmd == '<')
 826                 vi_shift(r1, r2, cmd == '>' ? +1 : -1);
 827         return 0;
 828 }
 829
 830 static int vc_insert(int cmd)
 831 {
 832         char *pref, *post;
 833         char *ln = lbuf_get(xb, xrow);
 834         int row, off = 0;
 835         char *rep;
 836         if (cmd == 'I')
 837                 xoff = lbuf_indents(xb, xrow);
 838         if (cmd == 'A')
 839                 xoff = lbuf_eol(xb, xrow);
 840         xoff = ren_noeol(ln, xoff);
 841         if (cmd == 'o')
 842                 xrow += 1;
 843         if (cmd == 'i' || cmd == 'I')
 844                 off = xoff;
 845         if (cmd == 'a' || cmd == 'A')
 846                 off = xoff + 1;
 847         if (ln && ln[0] == '\n')
 848                 off = 0;
 849         pref = ln && cmd != 'o' && cmd != 'O' ? uc_sub(ln, 0, off) : vi_indents(ln);
 850         post = ln && cmd != 'o' && cmd != 'O' ? uc_sub(ln, off, -1) : uc_dup("\n");
 851         vi_drawrm(xrow, xrow, cmd == 'o' || cmd == 'O');
 852         rep = vi_input(pref, post, &row, &off);
 853         if ((cmd == 'o' || cmd == 'O') && !lbuf_len(xb))
 854                 lbuf_edit(xb, "\n", 0, 0);
 855         if (rep) {
 856                 lbuf_edit(xb, rep, xrow, xrow + (cmd != 'o' && cmd != 'O'));
 857                 xrow += row - 1;
 858                 xoff = off;
 859                 free(rep);
 860         }
 861         free(pref);
 862         free(post);
 863         return !rep;
 864 }
 865
 866 static int vc_put(int cmd)
 867 {
 868         int cnt = MAX(1, vi_arg1);
 869         int lnmode;
 870         char *buf = reg_get(vi_ybuf, &lnmode);
 871         int i;
 872         if (!buf) {
 873                 snprintf(vi_msg, sizeof(vi_msg), "yank buffer empty\n");
 874                 return 1;
 875         }
 876         if (lnmode) {
 877                 struct sbuf *sb = sbuf_make();
 878                 for (i = 0; i < cnt; i++)
 879                         sbuf_str(sb, buf);
 880                 if (!lbuf_len(xb))
 881                         lbuf_edit(xb, "\n", 0, 0);
 882                 if (cmd == 'p')
 883                         xrow++;
 884                 lbuf_edit(xb, sbuf_buf(sb), xrow, xrow);
 885                 xoff = lbuf_indents(xb, xrow);
 886                 sbuf_free(sb);
 887         } else {
 888                 struct sbuf *sb = sbuf_make();
 889                 char *ln = xrow < lbuf_len(xb) ? lbuf_get(xb, xrow) : "\n";
 890                 int off = ren_noeol(ln, xoff) + (ln[0] != '\n' && cmd == 'p');
 891                 char *s = uc_sub(ln, 0, off);
 892                 sbuf_str(sb, s);
 893                 free(s);
 894                 for (i = 0; i < cnt; i++)
 895                         sbuf_str(sb, buf);
 896                 s = uc_sub(ln, off, -1);
 897                 sbuf_str(sb, s);
 898                 free(s);
 899                 lbuf_edit(xb, sbuf_buf(sb), xrow, xrow + 1);
 900                 xoff = off + uc_slen(buf) * cnt - 1;
 901                 sbuf_free(sb);
 902         }
 903         return 0;
 904 }
 905
 906 static int join_spaces(char *prev, char *next)
 907 {
 908         int prevlen = strlen(prev);
 909         if (!prev[0])
 910                 return 0;
 911         if (prev[prevlen - 1] == ' ' || next[0] == ')')
 912                 return 0;
 913         return prev[prevlen - 1] == '.' ? 2 : 1;
 914 }
 915
 916 static int vc_join(void)
 917 {
 918         struct sbuf *sb;
 919         int cnt = vi_arg1 <= 1 ? 2 : vi_arg1;
 920         int beg = xrow;
 921         int end = xrow + cnt;
 922         int off = 0;
 923         int i;
 924         if (!lbuf_get(xb, beg) || !lbuf_get(xb, end - 1))
 925                 return 1;
 926         sb = sbuf_make();
 927         for (i = beg; i < end; i++) {
 928                 char *ln = lbuf_get(xb, i);
 929                 char *lnend = strchr(ln, '\n');
 930                 int spaces;
 931                 if (i > beg)
 932                         while (ln[0] == ' ' || ln[0] == '\t')
 933                                 ln++;
 934                 spaces = i > beg ? join_spaces(sbuf_buf(sb), ln) : 0;
 935                 off = uc_slen(sbuf_buf(sb));
 936                 while (spaces--)
 937                         sbuf_chr(sb, ' ');
 938                 sbuf_mem(sb, ln, lnend - ln);
 939         }
 940         sbuf_chr(sb, '\n');
 941         lbuf_edit(xb, sbuf_buf(sb), beg, end);
 942         xoff = off;
 943         sbuf_free(sb);
 944         return 0;
 945 }
 946
 947 static int vi_scrollforeward(int cnt)
 948 {
 949         if (xtop >= lbuf_len(xb) - 1)
 950                 return 1;
 951         xtop = MIN(lbuf_len(xb) - 1, xtop + cnt);
 952         xrow = MAX(xrow, xtop);
 953         return 0;
 954 }
 955
 956 static int vi_scrollbackward(int cnt)
 957 {
 958         if (xtop == 0)
 959                 return 1;
 960         xtop = MAX(0, xtop - cnt);
 961         xrow = MIN(xrow, xtop + xrows - 1);
 962         return 0;
 963 }
 964
 965 static void vc_status(void)
 966 {
 967         int col = vi_off2col(xb, xrow, xoff);
 968         snprintf(vi_msg, sizeof(vi_msg),
 969                 "\"%s\"%c %d lines  L%d C%d\n",
 970                 ex_path()[0] ? ex_path() : "unnamed",
 971                 lbuf_modified(xb) ? '*' : ' ',
 972                 lbuf_len(xb), xrow + 1,
 973                 ren_cursor(lbuf_get(xb, xrow), col) + 1);
 974 }
 975
 976 static void vc_charinfo(void)
 977 {
 978         char *c = uc_chr(lbuf_get(xb, xrow), xoff);
 979         if (c) {
 980                 char cbuf[8] = "";
 981                 memcpy(cbuf, c, uc_len(c));
 982                 snprintf(vi_msg, sizeof(vi_msg), "<%s> %04x\n", cbuf, uc_code(c));
 983         }
 984 }
 985
 986 static int vc_replace(void)
 987 {
 988         int cnt = MAX(1, vi_arg1);
 989         char *cs = vi_char();
 990         char *ln = lbuf_get(xb, xrow);
 991         struct sbuf *sb;
 992         char *pref, *post;
 993         char *s;
 994         int off, i;
 995         if (!ln || !cs)
 996                 return 1;
 997         off = ren_noeol(ln, xoff);
 998         s = uc_chr(ln, off);
 999         for (i = 0; s[0] != '\n' && i < cnt; i++)
1000                 s = uc_next(s);
1001         if (i < cnt)
1002                 return 1;
1003         pref = uc_sub(ln, 0, off);
1004         post = uc_sub(ln, off + cnt, -1);
1005         sb = sbuf_make();
1006         sbuf_str(sb, pref);
1007         for (i = 0; i < cnt; i++)
1008                 sbuf_str(sb, cs);
1009         sbuf_str(sb, post);
1010         lbuf_edit(xb, sbuf_buf(sb), xrow, xrow + 1);
1011         off += cnt - 1;
1012         xoff = off;
1013         sbuf_free(sb);
1014         free(pref);
1015         free(post);
1016         return 0;
1017 }
1018
1019 static char rep_cmd[4096];      /* the last command */
1020 static int rep_len;
1021
1022 static void vc_repeat(void)
1023 {
1024         int i;
1025         for (i = 0; i < MAX(1, vi_arg1); i++)
1026                 term_push(rep_cmd, rep_len);
1027 }
1028
1029 static void vc_execute(void)
1030 {
1031         static int exec_buf;
1032         int lnmode;
1033         int c = vi_read();
1034         char *buf;
1035         int i;
1036         if (TK_INT(c))
1037                 return;
1038         if (c == '@')
1039                 c = exec_buf;
1040         exec_buf = c;
1041         buf = reg_get(exec_buf, &lnmode);
1042         if (buf)
1043                 for (i = 0; i < MAX(1, vi_arg1); i++)
1044                         term_push(buf, strlen(buf));
1045 }
1046
1047 static void vi(void)
1048 {
1049         int xcol;
1050         int mark;
1051         char *ln;
1052         char *kmap = NULL;
1053         xtop = MAX(0, xrow - xrows / 2);
1054         xoff = 0;
1055         xcol = vi_off2col(xb, xrow, xoff);
1056         vi_drawagain(xcol, 0);
1057         term_pos(xrow - xtop, led_pos(lbuf_get(xb, xrow), xcol));
1058         while (!xquit) {
1059                 int mod = 0;    /* screen should be redrawn */
1060                 int nrow = xrow;
1061                 int noff = ren_noeol(lbuf_get(xb, xrow), xoff);
1062                 int otop = xtop;
1063                 int oleft = xleft;
1064                 int mv, n;
1065                 term_cmd(&n);
1066                 vi_arg2 = 0;
1067                 vi_ybuf = vi_yankbuf();
1068                 vi_arg1 = vi_prefix();
1069                 if (!vi_ybuf)
1070                         vi_ybuf = vi_yankbuf();
1071                 mv = vi_motion(&nrow, &noff);
1072                 if (mv > 0) {
1073                         if (strchr("\'`GHML/?{}[]nN", mv) ||
1074                                         (mv == '%' && noff < 0)) {
1075                                 lbuf_mark(xb, '\'', xrow, xoff);
1076                                 lbuf_mark(xb, '`', xrow, xoff);
1077                         }
1078                         xrow = nrow;
1079                         if (noff < 0 && !strchr("jk", mv))
1080                                 noff = lbuf_indents(xb, xrow);
1081                         if (strchr("jk", mv))
1082                                 noff = vi_col2off(xb, xrow, xcol);
1083                         xoff = ren_noeol(lbuf_get(xb, xrow), noff);
1084                         if (!strchr("|jk", mv))
1085                                 xcol = vi_off2col(xb, xrow, xoff);
1086                         if (mv == '|')
1087                                 xcol = vi_pcol;
1088                 } else if (mv == 0) {
1089                         char *cmd;
1090                         int c = vi_read();
1091                         int k;
1092                         if (c <= 0)
1093                                 continue;
1094                         lbuf_mark(xb, '*', xrow, xoff);
1095                         switch (c) {
1096                         case TK_CTL('b'):
1097                                 if (vi_scrollbackward(MAX(1, vi_arg1) * (xrows - 1)))
1098                                         break;
1099                                 xoff = lbuf_indents(xb, xrow);
1100                                 break;
1101                         case TK_CTL('f'):
1102                                 if (vi_scrollforeward(MAX(1, vi_arg1) * (xrows - 1)))
1103                                         break;
1104                                 xoff = lbuf_indents(xb, xrow);
1105                                 break;
1106                         case TK_CTL('e'):
1107                                 if (vi_scrollforeward(MAX(1, vi_arg1)))
1108                                         break;
1109                                 break;
1110                         case TK_CTL('y'):
1111                                 if (vi_scrollbackward(MAX(1, vi_arg1)))
1112                                         break;
1113                                 break;
1114                         case TK_CTL('u'):
1115                                 if (xrow == 0)
1116                                         break;
1117                                 if (vi_arg1)
1118                                         vi_scroll = vi_arg1;
1119                                 n = vi_scroll ? vi_scroll : xrows / 2;
1120                                 xrow = MAX(0, xrow - n);
1121                                 if (xtop > 0)
1122                                         xtop = MAX(0, xtop - n);
1123                                 xoff = lbuf_indents(xb, xrow);
1124                                 break;
1125                         case TK_CTL('d'):
1126                                 if (xrow == lbuf_len(xb) - 1)
1127                                         break;
1128                                 if (vi_arg1)
1129                                         vi_scroll = vi_arg1;
1130                                 n = vi_scroll ? vi_scroll : xrows / 2;
1131                                 xrow = MIN(MAX(0, lbuf_len(xb) - 1), xrow + n);
1132                                 if (xtop < lbuf_len(xb) - xrows)
1133                                         xtop = MIN(lbuf_len(xb) - xrows, xtop + n);
1134                                 xoff = lbuf_indents(xb, xrow);
1135                                 break;
1136                         case TK_CTL('z'):
1137                                 term_pos(xrows, 0);
1138                                 term_suspend();
1139                                 mod = 1;
1140                                 break;
1141                         case 'u':
1142                                 if (!lbuf_undo(xb)) {
1143                                         lbuf_jump(xb, '*', &xrow, &xoff);
1144                                         mod = 1;
1145                                 } else {
1146                                         snprintf(vi_msg, sizeof(vi_msg), "undo failed\n");
1147                                 }
1148                                 break;
1149                         case TK_CTL('r'):
1150                                 if (!lbuf_redo(xb)) {
1151                                         lbuf_jump(xb, '*', &xrow, &xoff);
1152                                         mod = 1;
1153                                 } else {
1154                                         snprintf(vi_msg, sizeof(vi_msg), "redo failed\n");
1155                                 }
1156                                 break;
1157                         case TK_CTL('g'):
1158                                 vc_status();
1159                                 break;
1160                         case TK_CTL('^'):
1161                                 ex_command("e #");
1162                                 mod = 1;
1163                                 break;
1164                         case ':':
1165                                 ln = vi_prompt(":", &kmap);
1166                                 if (ln && ln[0]) {
1167                                         ex_command(ln);
1168                                         mod = 1;
1169                                 }
1170                                 free(ln);
1171                                 if (xquit)
1172                                         continue;
1173                                 break;
1174                         case 'c':
1175                         case 'd':
1176                         case 'y':
1177                         case '!':
1178                         case '>':
1179                         case '<':
1180                                 if (!vc_motion(c))
1181                                         mod = 1;
1182                                 break;
1183                         case 'i':
1184                         case 'I':
1185                         case 'a':
1186                         case 'A':
1187                         case 'o':
1188                         case 'O':
1189                                 if (!vc_insert(c))
1190                                         mod = 1;
1191                                 break;
1192                         case 'J':
1193                                 if (!vc_join())
1194                                         mod = 1;
1195                                 break;
1196                         case TK_CTL('l'):
1197                                 term_done();
1198                                 term_init();
1199                                 mod = 1;
1200                                 break;
1201                         case 'm':
1202                                 if ((mark = vi_read()) > 0 && islower(mark))
1203                                         lbuf_mark(xb, mark, xrow, xoff);
1204                                 break;
1205                         case 'p':
1206                         case 'P':
1207                                 if (!vc_put(c))
1208                                         mod = 1;
1209                                 break;
1210                         case 'z':
1211                                 k = vi_read();
1212                                 switch (k) {
1213                                 case '\n':
1214                                         xtop = vi_arg1 ? vi_arg1 : xrow;
1215                                         break;
1216                                 case '.':
1217                                         n = vi_arg1 ? vi_arg1 : xrow;
1218                                         xtop = MAX(0, n - xrows / 2);
1219                                         break;
1220                                 case '-':
1221                                         n = vi_arg1 ? vi_arg1 : xrow;
1222                                         xtop = MAX(0, n - xrows + 1);
1223                                         break;
1224                                 case 'l':
1225                                 case 'r':
1226                                         xdir = k == 'r' ? -1 : +1;
1227                                         break;
1228                                 case 'L':
1229                                 case 'R':
1230                                         xdir = k == 'R' ? -2 : +2;
1231                                         break;
1232                                 }
1233                                 mod = 1;
1234                                 break;
1235                         case 'g':
1236                                 k = vi_read();
1237                                 if (k == '~' || k == 'u' || k == 'U')
1238                                         if (!vc_motion(k))
1239                                                 mod = 1;
1240                                 if (k == 'a')
1241                                         vc_charinfo();
1242                                 break;
1243                         case 'x':
1244                                 vi_back(' ');
1245                                 if (!vc_motion('d'))
1246                                         mod = 2;
1247                                 break;
1248                         case 'X':
1249                                 vi_back(TK_CTL('h'));
1250                                 if (!vc_motion('d'))
1251                                         mod = 2;
1252                                 break;
1253                         case 'C':
1254                                 vi_back('$');
1255                                 if (!vc_motion('c'))
1256                                         mod = 1;
1257                                 break;
1258                         case 'D':
1259                                 vi_back('$');
1260                                 if (!vc_motion('d'))
1261                                         mod = 2;
1262                                 break;
1263                         case 'r':
1264                                 if (!vc_replace())
1265                                         mod = 2;
1266                                 break;
1267                         case 's':
1268                                 vi_back(' ');
1269                                 if (!vc_motion('c'))
1270                                         mod = 1;
1271                                 break;
1272                         case 'S':
1273                                 vi_back('c');
1274                                 if (!vc_motion('c'))
1275                                         mod = 1;
1276                                 break;
1277                         case 'Y':
1278                                 vi_back('y');
1279                                 vc_motion('y');
1280                                 break;
1281                         case 'Z':
1282                                 k = vi_read();
1283                                 if (k == 'Z')
1284                                         ex_command("x");
1285                                 break;
1286                         case '~':
1287                                 vi_back(' ');
1288                                 if (!vc_motion('~'))
1289                                         mod = 2;
1290                                 break;
1291                         case '.':
1292                                 vc_repeat();
1293                                 break;
1294                         case '@':
1295                                 vc_execute();
1296                                 break;
1297                         default:
1298                                 continue;
1299                         }
1300                         cmd = term_cmd(&n);
1301                         if (strchr("!<>ACDIJOPRSXYacdioprsxy~", c)) {
1302                                 if (n < sizeof(rep_cmd)) {
1303                                         memcpy(rep_cmd, cmd, n);
1304                                         rep_len = n;
1305                                 }
1306                         }
1307                 }
1308                 if (xrow < 0 || xrow >= lbuf_len(xb))
1309                         xrow = lbuf_len(xb) ? lbuf_len(xb) - 1 : 0;
1310                 if (xtop > xrow)
1311                         xtop = xtop - xrows / 2 > xrow ?
1312                                         MAX(0, xrow - xrows / 2) : xrow;
1313                 if (xtop + xrows <= xrow)
1314                         xtop = xtop + xrows + xrows / 2 <= xrow ?
1315                                         xrow - xrows / 2 : xrow - xrows + 1;
1316                 xoff = ren_noeol(lbuf_get(xb, xrow), xoff);
1317                 if (mod)
1318                         xcol = vi_off2col(xb, xrow, xoff);
1319                 if (xcol >= xleft + xcols)
1320                         xleft = xcol - xcols / 2;
1321                 if (xcol < xleft)
1322                         xleft = xcol < xcols ? 0 : xcol - xcols / 2;
1323                 vi_wait();
1324                 if (mod || xleft != oleft)
1325                         vi_drawagain(xcol, mod == 2 && xleft == oleft);
1326                 else if (xtop != otop)
1327                         vi_drawupdate(xcol, otop);
1328                 if (vi_msg[0])
1329                         vi_drawmsg();
1330                 term_pos(xrow - xtop, led_pos(lbuf_get(xb, xrow),
1331                                 ren_cursor(lbuf_get(xb, xrow), xcol)));
1332                 lbuf_modified(xb);
1333         }
1334         term_pos(xrows, 0);
1335         term_kill();
1336 }
1337
1338 int main(int argc, char *argv[])
1339 {
1340         int i;
1341         char *prog = strchr(argv[0], '/') ? strrchr(argv[0], '/') + 1 : argv[0];
1342         xvis = strcmp("ex", prog) && strcmp("neatex", prog);
1343         for (i = 1; i < argc && argv[i][0] == '-'; i++) {
1344                 if (argv[i][1] == 's')
1345                         xled = 0;
1346                 if (argv[i][1] == 'e')
1347                         xvis = 0;
1348                 if (argv[i][1] == 'v')
1349                         xvis = 1;
1350         }
1351         dir_init();
1352         syn_init();
1353         if (xled || xvis)
1354                 term_init();
1355         if (!ex_init(argv + i)) {
1356                 if (xvis)
1357                         vi();
1358                 else
1359                         ex();
1360                 if (xled || xvis)
1361                         term_done();
1362                 ex_done();
1363         }
1364         reg_done();
1365         syn_done();
1366         dir_done();
1367         return 0;
1368 }