lib/libedit/term.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Christos Zoulas of Cornell University.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)term.c   8.2 (Berkeley) 4/30/95
  33  * $NetBSD: term.c,v 1.46 2006/11/24 00:01:17 christos Exp $
  34  * $DragonFly: src/lib/libedit/term.c,v 1.5 2007/05/05 00:27:39 pavalos Exp $
  35  */
  36
  37 #include "config.h"
  38
  39 /*
  40  * term.c: Editor/termcap-curses interface
  41  *         We have to declare a static variable here, since the
  42  *         termcap putchar routine does not take an argument!
  43  */
  44 #include <stdio.h>
  45 #include <signal.h>
  46 #include <string.h>
  47 #include <stdlib.h>
  48 #include <unistd.h>
  49 #ifdef HAVE_TERMCAP_H
  50 #include <termcap.h>
  51 #endif
  52 #ifdef HAVE_CURSES_H
  53 #include <curses.h>
  54 #endif
  55 #ifdef HAVE_NCURSES_H
  56 #include <ncurses.h>
  57 #endif
  58 /* Solaris's term.h does horrid things. */
  59 #if (defined(HAVE_TERM_H) && !defined(SUNOS))
  60 #include <term.h>
  61 #endif
  62 #include <sys/types.h>
  63 #include <sys/ioctl.h>
  64
  65 #include "el.h"
  66
  67 /*
  68  * IMPORTANT NOTE: these routines are allowed to look at the current screen
  69  * and the current possition assuming that it is correct.  If this is not
  70  * true, then the update will be WRONG!  This is (should be) a valid
  71  * assumption...
  72  */
  73
  74 #define TC_BUFSIZE      2048
  75
  76 #define GoodStr(a)      (el->el_term.t_str[a] != NULL && \
  77                             el->el_term.t_str[a][0] != '\0')
  78 #define Str(a)          el->el_term.t_str[a]
  79 #define Val(a)          el->el_term.t_val[a]
  80
  81 #ifdef notdef
  82 private const struct {
  83         const char *b_name;
  84         int b_rate;
  85 } baud_rate[] = {
  86 #ifdef B0
  87         { "0", B0 },
  88 #endif
  89 #ifdef B50
  90         { "50", B50 },
  91 #endif
  92 #ifdef B75
  93         { "75", B75 },
  94 #endif
  95 #ifdef B110
  96         { "110", B110 },
  97 #endif
  98 #ifdef B134
  99         { "134", B134 },
 100 #endif
 101 #ifdef B150
 102         { "150", B150 },
 103 #endif
 104 #ifdef B200
 105         { "200", B200 },
 106 #endif
 107 #ifdef B300
 108         { "300", B300 },
 109 #endif
 110 #ifdef B600
 111         { "600", B600 },
 112 #endif
 113 #ifdef B900
 114         { "900", B900 },
 115 #endif
 116 #ifdef B1200
 117         { "1200", B1200 },
 118 #endif
 119 #ifdef B1800
 120         { "1800", B1800 },
 121 #endif
 122 #ifdef B2400
 123         { "2400", B2400 },
 124 #endif
 125 #ifdef B3600
 126         { "3600", B3600 },
 127 #endif
 128 #ifdef B4800
 129         { "4800", B4800 },
 130 #endif
 131 #ifdef B7200
 132         { "7200", B7200 },
 133 #endif
 134 #ifdef B9600
 135         { "9600", B9600 },
 136 #endif
 137 #ifdef EXTA
 138         { "19200", EXTA },
 139 #endif
 140 #ifdef B19200
 141         { "19200", B19200 },
 142 #endif
 143 #ifdef EXTB
 144         { "38400", EXTB },
 145 #endif
 146 #ifdef B38400
 147         { "38400", B38400 },
 148 #endif
 149         { NULL, 0 }
 150 };
 151 #endif
 152
 153 private const struct termcapstr {
 154         const char *name;
 155         const char *long_name;
 156 } tstr[] = {
 157 #define T_al    0
 158         { "al", "add new blank line" },
 159 #define T_bl    1
 160         { "bl", "audible bell" },
 161 #define T_cd    2
 162         { "cd", "clear to bottom" },
 163 #define T_ce    3
 164         { "ce", "clear to end of line" },
 165 #define T_ch    4
 166         { "ch", "cursor to horiz pos" },
 167 #define T_cl    5
 168         { "cl", "clear screen" },
 169 #define T_dc    6
 170         { "dc", "delete a character" },
 171 #define T_dl    7
 172         { "dl", "delete a line" },
 173 #define T_dm    8
 174         { "dm", "start delete mode" },
 175 #define T_ed    9
 176         { "ed", "end delete mode" },
 177 #define T_ei    10
 178         { "ei", "end insert mode" },
 179 #define T_fs    11
 180         { "fs", "cursor from status line" },
 181 #define T_ho    12
 182         { "ho", "home cursor" },
 183 #define T_ic    13
 184         { "ic", "insert character" },
 185 #define T_im    14
 186         { "im", "start insert mode" },
 187 #define T_ip    15
 188         { "ip", "insert padding" },
 189 #define T_kd    16
 190         { "kd", "sends cursor down" },
 191 #define T_kl    17
 192         { "kl", "sends cursor left" },
 193 #define T_kr    18
 194         { "kr", "sends cursor right" },
 195 #define T_ku    19
 196         { "ku", "sends cursor up" },
 197 #define T_md    20
 198         { "md", "begin bold" },
 199 #define T_me    21
 200         { "me", "end attributes" },
 201 #define T_nd    22
 202         { "nd", "non destructive space" },
 203 #define T_se    23
 204         { "se", "end standout" },
 205 #define T_so    24
 206         { "so", "begin standout" },
 207 #define T_ts    25
 208         { "ts", "cursor to status line" },
 209 #define T_up    26
 210         { "up", "cursor up one" },
 211 #define T_us    27
 212         { "us", "begin underline" },
 213 #define T_ue    28
 214         { "ue", "end underline" },
 215 #define T_vb    29
 216         { "vb", "visible bell" },
 217 #define T_DC    30
 218         { "DC", "delete multiple chars" },
 219 #define T_DO    31
 220         { "DO", "cursor down multiple" },
 221 #define T_IC    32
 222         { "IC", "insert multiple chars" },
 223 #define T_LE    33
 224         { "LE", "cursor left multiple" },
 225 #define T_RI    34
 226         { "RI", "cursor right multiple" },
 227 #define T_UP    35
 228         { "UP", "cursor up multiple" },
 229 #define T_kh    36
 230         { "kh", "send cursor home" },
 231 #define T_at7   37
 232         { "@7", "send cursor end" },
 233 #define T_str   38
 234         { NULL, NULL }
 235 };
 236
 237 private const struct termcapval {
 238         const char *name;
 239         const char *long_name;
 240 } tval[] = {
 241 #define T_am    0
 242         { "am", "has automatic margins" },
 243 #define T_pt    1
 244         { "pt", "has physical tabs" },
 245 #define T_li    2
 246         { "li", "Number of lines" },
 247 #define T_co    3
 248         { "co", "Number of columns" },
 249 #define T_km    4
 250         { "km", "Has meta key" },
 251 #define T_xt    5
 252         { "xt", "Tab chars destructive" },
 253 #define T_xn    6
 254         { "xn", "newline ignored at right margin" },
 255 #define T_MT    7
 256         { "MT", "Has meta key" },                       /* XXX? */
 257 #define T_val   8
 258         { NULL, NULL, }
 259 };
 260 /* do two or more of the attributes use me */
 261
 262 private void    term_setflags(EditLine *);
 263 private int     term_rebuffer_display(EditLine *);
 264 private void    term_free_display(EditLine *);
 265 private int     term_alloc_display(EditLine *);
 266 private void    term_alloc(EditLine *, const struct termcapstr *, const char *);
 267 private void    term_init_arrow(EditLine *);
 268 private void    term_reset_arrow(EditLine *);
 269
 270
 271 private FILE *term_outfile = NULL;      /* XXX: How do we fix that? */
 272
 273
 274 /* term_setflags():
 275  *      Set the terminal capability flags
 276  */
 277 private void
 278 term_setflags(EditLine *el)
 279 {
 280         EL_FLAGS = 0;
 281         if (el->el_tty.t_tabs)
 282                 EL_FLAGS |= (Val(T_pt) && !Val(T_xt)) ? TERM_CAN_TAB : 0;
 283
 284         EL_FLAGS |= (Val(T_km) || Val(T_MT)) ? TERM_HAS_META : 0;
 285         EL_FLAGS |= GoodStr(T_ce) ? TERM_CAN_CEOL : 0;
 286         EL_FLAGS |= (GoodStr(T_dc) || GoodStr(T_DC)) ? TERM_CAN_DELETE : 0;
 287         EL_FLAGS |= (GoodStr(T_im) || GoodStr(T_ic) || GoodStr(T_IC)) ?
 288             TERM_CAN_INSERT : 0;
 289         EL_FLAGS |= (GoodStr(T_up) || GoodStr(T_UP)) ? TERM_CAN_UP : 0;
 290         EL_FLAGS |= Val(T_am) ? TERM_HAS_AUTO_MARGINS : 0;
 291         EL_FLAGS |= Val(T_xn) ? TERM_HAS_MAGIC_MARGINS : 0;
 292
 293         if (GoodStr(T_me) && GoodStr(T_ue))
 294                 EL_FLAGS |= (strcmp(Str(T_me), Str(T_ue)) == 0) ?
 295                     TERM_CAN_ME : 0;
 296         else
 297                 EL_FLAGS &= ~TERM_CAN_ME;
 298         if (GoodStr(T_me) && GoodStr(T_se))
 299                 EL_FLAGS |= (strcmp(Str(T_me), Str(T_se)) == 0) ?
 300                     TERM_CAN_ME : 0;
 301
 302
 303 #ifdef DEBUG_SCREEN
 304         if (!EL_CAN_UP) {
 305                 (void) fprintf(el->el_errfile,
 306                     "WARNING: Your terminal cannot move up.\n");
 307                 (void) fprintf(el->el_errfile,
 308                     "Editing may be odd for long lines.\n");
 309         }
 310         if (!EL_CAN_CEOL)
 311                 (void) fprintf(el->el_errfile, "no clear EOL capability.\n");
 312         if (!EL_CAN_DELETE)
 313                 (void) fprintf(el->el_errfile, "no delete char capability.\n");
 314         if (!EL_CAN_INSERT)
 315                 (void) fprintf(el->el_errfile, "no insert char capability.\n");
 316 #endif /* DEBUG_SCREEN */
 317 }
 318
 319
 320 /* term_init():
 321  *      Initialize the terminal stuff
 322  */
 323 protected int
 324 term_init(EditLine *el)
 325 {
 326
 327         el->el_term.t_buf = (char *) el_malloc(TC_BUFSIZE);
 328         if (el->el_term.t_buf == NULL)
 329                 return (-1);
 330         el->el_term.t_cap = (char *) el_malloc(TC_BUFSIZE);
 331         if (el->el_term.t_cap == NULL)
 332                 return (-1);
 333         el->el_term.t_fkey = (fkey_t *) el_malloc(A_K_NKEYS * sizeof(fkey_t));
 334         if (el->el_term.t_fkey == NULL)
 335                 return (-1);
 336         el->el_term.t_loc = 0;
 337         el->el_term.t_str = (char **) el_malloc(T_str * sizeof(char *));
 338         if (el->el_term.t_str == NULL)
 339                 return (-1);
 340         (void) memset(el->el_term.t_str, 0, T_str * sizeof(char *));
 341         el->el_term.t_val = (int *) el_malloc(T_val * sizeof(int));
 342         if (el->el_term.t_val == NULL)
 343                 return (-1);
 344         (void) memset(el->el_term.t_val, 0, T_val * sizeof(int));
 345         term_outfile = el->el_outfile;
 346         (void) term_set(el, NULL);
 347         term_init_arrow(el);
 348         return (0);
 349 }
 350
 351 /* term_end():
 352  *      Clean up the terminal stuff
 353  */
 354 protected void
 355 term_end(EditLine *el)
 356 {
 357
 358         el_free((ptr_t) el->el_term.t_buf);
 359         el->el_term.t_buf = NULL;
 360         el_free((ptr_t) el->el_term.t_cap);
 361         el->el_term.t_cap = NULL;
 362         el->el_term.t_loc = 0;
 363         el_free((ptr_t) el->el_term.t_str);
 364         el->el_term.t_str = NULL;
 365         el_free((ptr_t) el->el_term.t_val);
 366         el->el_term.t_val = NULL;
 367         el_free((ptr_t) el->el_term.t_fkey);
 368         el->el_term.t_fkey = NULL;
 369         term_free_display(el);
 370 }
 371
 372
 373 /* term_alloc():
 374  *      Maintain a string pool for termcap strings
 375  */
 376 private void
 377 term_alloc(EditLine *el, const struct termcapstr *t, const char *cap)
 378 {
 379         char termbuf[TC_BUFSIZE];
 380         int tlen, clen;
 381         char **tlist = el->el_term.t_str;
 382         char **tmp, **str = &tlist[t - tstr];
 383
 384         if (cap == NULL || *cap == '\0') {
 385                 *str = NULL;
 386                 return;
 387         } else
 388                 clen = strlen(cap);
 389
 390         tlen = *str == NULL ? 0 : strlen(*str);
 391
 392         /*
 393          * New string is shorter; no need to allocate space
 394          */
 395         if (clen <= tlen) {
 396                 if (*str)
 397                         (void) strcpy(*str, cap);       /* XXX strcpy is safe */
 398                 return;
 399         }
 400         /*
 401          * New string is longer; see if we have enough space to append
 402          */
 403         if (el->el_term.t_loc + 3 < TC_BUFSIZE) {
 404                                                 /* XXX strcpy is safe */
 405                 (void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc],
 406                     cap);
 407                 el->el_term.t_loc += clen + 1;  /* one for \0 */
 408                 return;
 409         }
 410         /*
 411          * Compact our buffer; no need to check compaction, cause we know it
 412          * fits...
 413          */
 414         tlen = 0;
 415         for (tmp = tlist; tmp < &tlist[T_str]; tmp++)
 416                 if (*tmp != NULL && *tmp != '\0' && *tmp != *str) {
 417                         char *ptr;
 418
 419                         for (ptr = *tmp; *ptr != '\0'; termbuf[tlen++] = *ptr++)
 420                                 continue;
 421                         termbuf[tlen++] = '\0';
 422                 }
 423         memcpy(el->el_term.t_buf, termbuf, TC_BUFSIZE);
 424         el->el_term.t_loc = tlen;
 425         if (el->el_term.t_loc + 3 >= TC_BUFSIZE) {
 426                 (void) fprintf(el->el_errfile,
 427                     "Out of termcap string space.\n");
 428                 return;
 429         }
 430                                         /* XXX strcpy is safe */
 431         (void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc], cap);
 432         el->el_term.t_loc += clen + 1;  /* one for \0 */
 433         return;
 434 }
 435
 436
 437 /* term_rebuffer_display():
 438  *      Rebuffer the display after the screen changed size
 439  */
 440 private int
 441 term_rebuffer_display(EditLine *el)
 442 {
 443         coord_t *c = &el->el_term.t_size;
 444
 445         term_free_display(el);
 446
 447         c->h = Val(T_co);
 448         c->v = Val(T_li);
 449
 450         if (term_alloc_display(el) == -1)
 451                 return (-1);
 452         return (0);
 453 }
 454
 455
 456 /* term_alloc_display():
 457  *      Allocate a new display.
 458  */
 459 private int
 460 term_alloc_display(EditLine *el)
 461 {
 462         int i;
 463         char **b;
 464         coord_t *c = &el->el_term.t_size;
 465
 466         b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
 467         if (b == NULL)
 468                 return (-1);
 469         for (i = 0; i < c->v; i++) {
 470                 b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
 471                 if (b[i] == NULL) {
 472                         while (--i >= 0)
 473                                 el_free((ptr_t) b[i]);
 474                         el_free((ptr_t) b);
 475                         return (-1);
 476                 }
 477         }
 478         b[c->v] = NULL;
 479         el->el_display = b;
 480
 481         b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
 482         if (b == NULL)
 483                 return (-1);
 484         for (i = 0; i < c->v; i++) {
 485                 b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
 486                 if (b[i] == NULL) {
 487                         while (--i >= 0)
 488                                 el_free((ptr_t) b[i]);
 489                         el_free((ptr_t) b);
 490                         return (-1);
 491                 }
 492         }
 493         b[c->v] = NULL;
 494         el->el_vdisplay = b;
 495         return (0);
 496 }
 497
 498
 499 /* term_free_display():
 500  *      Free the display buffers
 501  */
 502 private void
 503 term_free_display(EditLine *el)
 504 {
 505         char **b;
 506         char **bufp;
 507
 508         b = el->el_display;
 509         el->el_display = NULL;
 510         if (b != NULL) {
 511                 for (bufp = b; *bufp != NULL; bufp++)
 512                         el_free((ptr_t) * bufp);
 513                 el_free((ptr_t) b);
 514         }
 515         b = el->el_vdisplay;
 516         el->el_vdisplay = NULL;
 517         if (b != NULL) {
 518                 for (bufp = b; *bufp != NULL; bufp++)
 519                         el_free((ptr_t) * bufp);
 520                 el_free((ptr_t) b);
 521         }
 522 }
 523
 524
 525 /* term_move_to_line():
 526  *      move to line <where> (first line == 0)
 527  *      as efficiently as possible
 528  */
 529 protected void
 530 term_move_to_line(EditLine *el, int where)
 531 {
 532         int del;
 533
 534         if (where == el->el_cursor.v)
 535                 return;
 536
 537         if (where > el->el_term.t_size.v) {
 538 #ifdef DEBUG_SCREEN
 539                 (void) fprintf(el->el_errfile,
 540                     "term_move_to_line: where is ridiculous: %d\r\n", where);
 541 #endif /* DEBUG_SCREEN */
 542                 return;
 543         }
 544         if ((del = where - el->el_cursor.v) > 0) {
 545                 while (del > 0) {
 546                         if (EL_HAS_AUTO_MARGINS &&
 547                             el->el_display[el->el_cursor.v][0] != '\0') {
 548                                 /* move without newline */
 549                                 term_move_to_char(el, el->el_term.t_size.h - 1);
 550                                 term_overwrite(el,
 551                                     &el->el_display[el->el_cursor.v][el->el_cursor.h],
 552                                     1);
 553                                 /* updates Cursor */
 554                                 del--;
 555                         } else {
 556                                 if ((del > 1) && GoodStr(T_DO)) {
 557                                         (void) tputs(tgoto(Str(T_DO), del, del),
 558                                             del, term__putc);
 559                                         del = 0;
 560                                 } else {
 561                                         for (; del > 0; del--)
 562                                                 term__putc('\n');
 563                                         /* because the \n will become \r\n */
 564                                         el->el_cursor.h = 0;
 565                                 }
 566                         }
 567                 }
 568         } else {                /* del < 0 */
 569                 if (GoodStr(T_UP) && (-del > 1 || !GoodStr(T_up)))
 570                         (void) tputs(tgoto(Str(T_UP), -del, -del), -del,
 571                             term__putc);
 572                 else {
 573                         if (GoodStr(T_up))
 574                                 for (; del < 0; del++)
 575                                         (void) tputs(Str(T_up), 1, term__putc);
 576                 }
 577         }
 578         el->el_cursor.v = where;/* now where is here */
 579 }
 580
 581
 582 /* term_move_to_char():
 583  *      Move to the character position specified
 584  */
 585 protected void
 586 term_move_to_char(EditLine *el, int where)
 587 {
 588         int del, i;
 589
 590 mc_again:
 591         if (where == el->el_cursor.h)
 592                 return;
 593
 594         if (where > el->el_term.t_size.h) {
 595 #ifdef DEBUG_SCREEN
 596                 (void) fprintf(el->el_errfile,
 597                     "term_move_to_char: where is riduculous: %d\r\n", where);
 598 #endif /* DEBUG_SCREEN */
 599                 return;
 600         }
 601         if (!where) {           /* if where is first column */
 602                 term__putc('\r');       /* do a CR */
 603                 el->el_cursor.h = 0;
 604                 return;
 605         }
 606         del = where - el->el_cursor.h;
 607
 608         if ((del < -4 || del > 4) && GoodStr(T_ch))
 609                 /* go there directly */
 610                 (void) tputs(tgoto(Str(T_ch), where, where), where, term__putc);
 611         else {
 612                 if (del > 0) {  /* moving forward */
 613                         if ((del > 4) && GoodStr(T_RI))
 614                                 (void) tputs(tgoto(Str(T_RI), del, del),
 615                                     del, term__putc);
 616                         else {
 617                                         /* if I can do tabs, use them */
 618                                 if (EL_CAN_TAB) {
 619                                         if ((el->el_cursor.h & 0370) !=
 620                                             (where & 0370)) {
 621                                                 /* if not within tab stop */
 622                                                 for (i =
 623                                                     (el->el_cursor.h & 0370);
 624                                                     i < (where & 0370);
 625                                                     i += 8)
 626                                                         term__putc('\t');
 627                                                         /* then tab over */
 628                                                 el->el_cursor.h = where & 0370;
 629                                         }
 630                                 }
 631                                 /*
 632                                  * it's usually cheaper to just write the
 633                                  * chars, so we do.
 634                                  */
 635                                 /*
 636                                  * NOTE THAT term_overwrite() WILL CHANGE
 637                                  * el->el_cursor.h!!!
 638                                  */
 639                                 term_overwrite(el,
 640                                     &el->el_display[el->el_cursor.v][el->el_cursor.h],
 641                                     where - el->el_cursor.h);
 642
 643                         }
 644                 } else {        /* del < 0 := moving backward */
 645                         if ((-del > 4) && GoodStr(T_LE))
 646                                 (void) tputs(tgoto(Str(T_LE), -del, -del),
 647                                     -del, term__putc);
 648                         else {  /* can't go directly there */
 649                                 /*
 650                                  * if the "cost" is greater than the "cost"
 651                                  * from col 0
 652                                  */
 653                                 if (EL_CAN_TAB ?
 654                                     ((unsigned int)-del >
 655                                     (((unsigned int) where >> 3) +
 656                                      (where & 07)))
 657                                     : (-del > where)) {
 658                                         term__putc('\r');       /* do a CR */
 659                                         el->el_cursor.h = 0;
 660                                         goto mc_again;  /* and try again */
 661                                 }
 662                                 for (i = 0; i < -del; i++)
 663                                         term__putc('\b');
 664                         }
 665                 }
 666         }
 667         el->el_cursor.h = where;                /* now where is here */
 668 }
 669
 670
 671 /* term_overwrite():
 672  *      Overstrike num characters
 673  */
 674 protected void
 675 term_overwrite(EditLine *el, const char *cp, int n)
 676 {
 677         if (n <= 0)
 678                 return;         /* catch bugs */
 679
 680         if (n > el->el_term.t_size.h) {
 681 #ifdef DEBUG_SCREEN
 682                 (void) fprintf(el->el_errfile,
 683                     "term_overwrite: n is riduculous: %d\r\n", n);
 684 #endif /* DEBUG_SCREEN */
 685                 return;
 686         }
 687         do {
 688                 term__putc(*cp++);
 689                 el->el_cursor.h++;
 690         } while (--n);
 691
 692         if (el->el_cursor.h >= el->el_term.t_size.h) {  /* wrap? */
 693                 if (EL_HAS_AUTO_MARGINS) {      /* yes */
 694                         el->el_cursor.h = 0;
 695                         el->el_cursor.v++;
 696                         if (EL_HAS_MAGIC_MARGINS) {
 697                                 /* force the wrap to avoid the "magic"
 698                                  * situation */
 699                                 char c;
 700                                 if ((c = el->el_display[el->el_cursor.v][el->el_cursor.h])
 701                                     != '\0')
 702                                         term_overwrite(el, &c, 1);
 703                                 else
 704                                         term__putc(' ');
 705                                 el->el_cursor.h = 1;
 706                         }
 707                 } else          /* no wrap, but cursor stays on screen */
 708                         el->el_cursor.h = el->el_term.t_size.h;
 709         }
 710 }
 711
 712
 713 /* term_deletechars():
 714  *      Delete num characters
 715  */
 716 protected void
 717 term_deletechars(EditLine *el, int num)
 718 {
 719         if (num <= 0)
 720                 return;
 721
 722         if (!EL_CAN_DELETE) {
 723 #ifdef DEBUG_EDIT
 724                 (void) fprintf(el->el_errfile, "   ERROR: cannot delete   \n");
 725 #endif /* DEBUG_EDIT */
 726                 return;
 727         }
 728         if (num > el->el_term.t_size.h) {
 729 #ifdef DEBUG_SCREEN
 730                 (void) fprintf(el->el_errfile,
 731                     "term_deletechars: num is riduculous: %d\r\n", num);
 732 #endif /* DEBUG_SCREEN */
 733                 return;
 734         }
 735         if (GoodStr(T_DC))      /* if I have multiple delete */
 736                 if ((num > 1) || !GoodStr(T_dc)) {      /* if dc would be more
 737                                                          * expen. */
 738                         (void) tputs(tgoto(Str(T_DC), num, num),
 739                             num, term__putc);
 740                         return;
 741                 }
 742         if (GoodStr(T_dm))      /* if I have delete mode */
 743                 (void) tputs(Str(T_dm), 1, term__putc);
 744
 745         if (GoodStr(T_dc))      /* else do one at a time */
 746                 while (num--)
 747                         (void) tputs(Str(T_dc), 1, term__putc);
 748
 749         if (GoodStr(T_ed))      /* if I have delete mode */
 750                 (void) tputs(Str(T_ed), 1, term__putc);
 751 }
 752
 753
 754 /* term_insertwrite():
 755  *      Puts terminal in insert character mode or inserts num
 756  *      characters in the line
 757  */
 758 protected void
 759 term_insertwrite(EditLine *el, char *cp, int num)
 760 {
 761         if (num <= 0)
 762                 return;
 763         if (!EL_CAN_INSERT) {
 764 #ifdef DEBUG_EDIT
 765                 (void) fprintf(el->el_errfile, "   ERROR: cannot insert   \n");
 766 #endif /* DEBUG_EDIT */
 767                 return;
 768         }
 769         if (num > el->el_term.t_size.h) {
 770 #ifdef DEBUG_SCREEN
 771                 (void) fprintf(el->el_errfile,
 772                     "StartInsert: num is riduculous: %d\r\n", num);
 773 #endif /* DEBUG_SCREEN */
 774                 return;
 775         }
 776         if (GoodStr(T_IC))      /* if I have multiple insert */
 777                 if ((num > 1) || !GoodStr(T_ic)) {
 778                                 /* if ic would be more expensive */
 779                         (void) tputs(tgoto(Str(T_IC), num, num),
 780                             num, term__putc);
 781                         term_overwrite(el, cp, num);
 782                                 /* this updates el_cursor.h */
 783                         return;
 784                 }
 785         if (GoodStr(T_im) && GoodStr(T_ei)) {   /* if I have insert mode */
 786                 (void) tputs(Str(T_im), 1, term__putc);
 787
 788                 el->el_cursor.h += num;
 789                 do
 790                         term__putc(*cp++);
 791                 while (--num);
 792
 793                 if (GoodStr(T_ip))      /* have to make num chars insert */
 794                         (void) tputs(Str(T_ip), 1, term__putc);
 795
 796                 (void) tputs(Str(T_ei), 1, term__putc);
 797                 return;
 798         }
 799         do {
 800                 if (GoodStr(T_ic))      /* have to make num chars insert */
 801                         (void) tputs(Str(T_ic), 1, term__putc);
 802                                         /* insert a char */
 803
 804                 term__putc(*cp++);
 805
 806                 el->el_cursor.h++;
 807
 808                 if (GoodStr(T_ip))      /* have to make num chars insert */
 809                         (void) tputs(Str(T_ip), 1, term__putc);
 810                                         /* pad the inserted char */
 811
 812         } while (--num);
 813 }
 814
 815
 816 /* term_clear_EOL():
 817  *      clear to end of line.  There are num characters to clear
 818  */
 819 protected void
 820 term_clear_EOL(EditLine *el, int num)
 821 {
 822         int i;
 823
 824         if (EL_CAN_CEOL && GoodStr(T_ce))
 825                 (void) tputs(Str(T_ce), 1, term__putc);
 826         else {
 827                 for (i = 0; i < num; i++)
 828                         term__putc(' ');
 829                 el->el_cursor.h += num; /* have written num spaces */
 830         }
 831 }
 832
 833
 834 /* term_clear_screen():
 835  *      Clear the screen
 836  */
 837 protected void
 838 term_clear_screen(EditLine *el)
 839 {                               /* clear the whole screen and home */
 840
 841         if (GoodStr(T_cl))
 842                 /* send the clear screen code */
 843                 (void) tputs(Str(T_cl), Val(T_li), term__putc);
 844         else if (GoodStr(T_ho) && GoodStr(T_cd)) {
 845                 (void) tputs(Str(T_ho), Val(T_li), term__putc); /* home */
 846                 /* clear to bottom of screen */
 847                 (void) tputs(Str(T_cd), Val(T_li), term__putc);
 848         } else {
 849                 term__putc('\r');
 850                 term__putc('\n');
 851         }
 852 }
 853
 854
 855 /* term_beep():
 856  *      Beep the way the terminal wants us
 857  */
 858 protected void
 859 term_beep(EditLine *el)
 860 {
 861         if (GoodStr(T_bl))
 862                 /* what termcap says we should use */
 863                 (void) tputs(Str(T_bl), 1, term__putc);
 864         else
 865                 term__putc('\007');     /* an ASCII bell; ^G */
 866 }
 867
 868
 869 #ifdef notdef
 870 /* term_clear_to_bottom():
 871  *      Clear to the bottom of the screen
 872  */
 873 protected void
 874 term_clear_to_bottom(EditLine *el)
 875 {
 876         if (GoodStr(T_cd))
 877                 (void) tputs(Str(T_cd), Val(T_li), term__putc);
 878         else if (GoodStr(T_ce))
 879                 (void) tputs(Str(T_ce), Val(T_li), term__putc);
 880 }
 881 #endif
 882
 883 protected void
 884 term_get(EditLine *el, const char **term)
 885 {
 886         *term = el->el_term.t_name;
 887 }
 888
 889
 890 /* term_set():
 891  *      Read in the terminal capabilities from the requested terminal
 892  */
 893 protected int
 894 term_set(EditLine *el, const char *term)
 895 {
 896         int i;
 897         char buf[TC_BUFSIZE];
 898         char *area;
 899         const struct termcapstr *t;
 900         sigset_t oset, nset;
 901         int lins, cols;
 902
 903         (void) sigemptyset(&nset);
 904         (void) sigaddset(&nset, SIGWINCH);
 905         (void) sigprocmask(SIG_BLOCK, &nset, &oset);
 906
 907         area = buf;
 908
 909
 910         if (term == NULL)
 911                 term = getenv("TERM");
 912
 913         if (!term || !term[0])
 914                 term = "dumb";
 915
 916         if (strcmp(term, "emacs") == 0)
 917                 el->el_flags |= EDIT_DISABLED;
 918
 919         memset(el->el_term.t_cap, 0, TC_BUFSIZE);
 920
 921         i = tgetent(el->el_term.t_cap, term);
 922
 923         if (i <= 0) {
 924                 if (i == -1)
 925                         (void) fprintf(el->el_errfile,
 926                             "Cannot read termcap database;\n");
 927                 else if (i == 0)
 928                         (void) fprintf(el->el_errfile,
 929                             "No entry for terminal type \"%s\";\n", term);
 930                 (void) fprintf(el->el_errfile,
 931                     "using dumb terminal settings.\n");
 932                 Val(T_co) = 80; /* do a dumb terminal */
 933                 Val(T_pt) = Val(T_km) = Val(T_li) = 0;
 934                 Val(T_xt) = Val(T_MT);
 935                 for (t = tstr; t->name != NULL; t++)
 936                         term_alloc(el, t, NULL);
 937         } else {
 938                 /* auto/magic margins */
 939                 Val(T_am) = tgetflag("am");
 940                 Val(T_xn) = tgetflag("xn");
 941                 /* Can we tab */
 942                 Val(T_pt) = tgetflag("pt");
 943                 Val(T_xt) = tgetflag("xt");
 944                 /* do we have a meta? */
 945                 Val(T_km) = tgetflag("km");
 946                 Val(T_MT) = tgetflag("MT");
 947                 /* Get the size */
 948                 Val(T_co) = tgetnum("co");
 949                 Val(T_li) = tgetnum("li");
 950                 for (t = tstr; t->name != NULL; t++) {
 951                         /* XXX: some systems' tgetstr needs non const */
 952                         term_alloc(el, t, tgetstr(strchr(t->name, *t->name),
 953                             &area));
 954                 }
 955         }
 956
 957         if (Val(T_co) < 2)
 958                 Val(T_co) = 80; /* just in case */
 959         if (Val(T_li) < 1)
 960                 Val(T_li) = 24;
 961
 962         el->el_term.t_size.v = Val(T_co);
 963         el->el_term.t_size.h = Val(T_li);
 964
 965         term_setflags(el);
 966
 967                                 /* get the correct window size */
 968         (void) term_get_size(el, &lins, &cols);
 969         if (term_change_size(el, lins, cols) == -1)
 970                 return (-1);
 971         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
 972         term_bind_arrow(el);
 973         el->el_term.t_name = term;
 974         return (i <= 0 ? -1 : 0);
 975 }
 976
 977
 978 /* term_get_size():
 979  *      Return the new window size in lines and cols, and
 980  *      true if the size was changed.
 981  */
 982 protected int
 983 term_get_size(EditLine *el, int *lins, int *cols)
 984 {
 985
 986         *cols = Val(T_co);
 987         *lins = Val(T_li);
 988
 989 #ifdef TIOCGWINSZ
 990         {
 991                 struct winsize ws;
 992                 if (ioctl(el->el_infd, TIOCGWINSZ, (ioctl_t) & ws) != -1) {
 993                         if (ws.ws_col)
 994                                 *cols = ws.ws_col;
 995                         if (ws.ws_row)
 996                                 *lins = ws.ws_row;
 997                 }
 998         }
 999 #endif
1000 #ifdef TIOCGSIZE
1001         {
1002                 struct ttysize ts;
1003                 if (ioctl(el->el_infd, TIOCGSIZE, (ioctl_t) & ts) != -1) {
1004                         if (ts.ts_cols)
1005                                 *cols = ts.ts_cols;
1006                         if (ts.ts_lines)
1007                                 *lins = ts.ts_lines;
1008                 }
1009         }
1010 #endif
1011         return (Val(T_co) != *cols || Val(T_li) != *lins);
1012 }
1013
1014
1015 /* term_change_size():
1016  *      Change the size of the terminal
1017  */
1018 protected int
1019 term_change_size(EditLine *el, int lins, int cols)
1020 {
1021         /*
1022          * Just in case
1023          */
1024         Val(T_co) = (cols < 2) ? 80 : cols;
1025         Val(T_li) = (lins < 1) ? 24 : lins;
1026
1027         /* re-make display buffers */
1028         if (term_rebuffer_display(el) == -1)
1029                 return (-1);
1030         re_clear_display(el);
1031         return (0);
1032 }
1033
1034
1035 /* term_init_arrow():
1036  *      Initialize the arrow key bindings from termcap
1037  */
1038 private void
1039 term_init_arrow(EditLine *el)
1040 {
1041         fkey_t *arrow = el->el_term.t_fkey;
1042
1043         arrow[A_K_DN].name = "down";
1044         arrow[A_K_DN].key = T_kd;
1045         arrow[A_K_DN].fun.cmd = ED_NEXT_HISTORY;
1046         arrow[A_K_DN].type = XK_CMD;
1047
1048         arrow[A_K_UP].name = "up";
1049         arrow[A_K_UP].key = T_ku;
1050         arrow[A_K_UP].fun.cmd = ED_PREV_HISTORY;
1051         arrow[A_K_UP].type = XK_CMD;
1052
1053         arrow[A_K_LT].name = "left";
1054         arrow[A_K_LT].key = T_kl;
1055         arrow[A_K_LT].fun.cmd = ED_PREV_CHAR;
1056         arrow[A_K_LT].type = XK_CMD;
1057
1058         arrow[A_K_RT].name = "right";
1059         arrow[A_K_RT].key = T_kr;
1060         arrow[A_K_RT].fun.cmd = ED_NEXT_CHAR;
1061         arrow[A_K_RT].type = XK_CMD;
1062
1063         arrow[A_K_HO].name = "home";
1064         arrow[A_K_HO].key = T_kh;
1065         arrow[A_K_HO].fun.cmd = ED_MOVE_TO_BEG;
1066         arrow[A_K_HO].type = XK_CMD;
1067
1068         arrow[A_K_EN].name = "end";
1069         arrow[A_K_EN].key = T_at7;
1070         arrow[A_K_EN].fun.cmd = ED_MOVE_TO_END;
1071         arrow[A_K_EN].type = XK_CMD;
1072 }
1073
1074
1075 /* term_reset_arrow():
1076  *      Reset arrow key bindings
1077  */
1078 private void
1079 term_reset_arrow(EditLine *el)
1080 {
1081         fkey_t *arrow = el->el_term.t_fkey;
1082         static const char strA[] = {033, '[', 'A', '\0'};
1083         static const char strB[] = {033, '[', 'B', '\0'};
1084         static const char strC[] = {033, '[', 'C', '\0'};
1085         static const char strD[] = {033, '[', 'D', '\0'};
1086         static const char strH[] = {033, '[', 'H', '\0'};
1087         static const char strF[] = {033, '[', 'F', '\0'};
1088         static const char stOA[] = {033, 'O', 'A', '\0'};
1089         static const char stOB[] = {033, 'O', 'B', '\0'};
1090         static const char stOC[] = {033, 'O', 'C', '\0'};
1091         static const char stOD[] = {033, 'O', 'D', '\0'};
1092         static const char stOH[] = {033, 'O', 'H', '\0'};
1093         static const char stOF[] = {033, 'O', 'F', '\0'};
1094
1095         key_add(el, strA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1096         key_add(el, strB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1097         key_add(el, strC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1098         key_add(el, strD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1099         key_add(el, strH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1100         key_add(el, strF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1101         key_add(el, stOA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1102         key_add(el, stOB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1103         key_add(el, stOC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1104         key_add(el, stOD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1105         key_add(el, stOH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1106         key_add(el, stOF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1107
1108         if (el->el_map.type == MAP_VI) {
1109                 key_add(el, &strA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1110                 key_add(el, &strB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1111                 key_add(el, &strC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1112                 key_add(el, &strD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1113                 key_add(el, &strH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1114                 key_add(el, &strF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1115                 key_add(el, &stOA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1116                 key_add(el, &stOB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1117                 key_add(el, &stOC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1118                 key_add(el, &stOD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1119                 key_add(el, &stOH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1120                 key_add(el, &stOF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1121         }
1122 }
1123
1124
1125 /* term_set_arrow():
1126  *      Set an arrow key binding
1127  */
1128 protected int
1129 term_set_arrow(EditLine *el, const char *name, key_value_t *fun, int type)
1130 {
1131         fkey_t *arrow = el->el_term.t_fkey;
1132         int i;
1133
1134         for (i = 0; i < A_K_NKEYS; i++)
1135                 if (strcmp(name, arrow[i].name) == 0) {
1136                         arrow[i].fun = *fun;
1137                         arrow[i].type = type;
1138                         return (0);
1139                 }
1140         return (-1);
1141 }
1142
1143
1144 /* term_clear_arrow():
1145  *      Clear an arrow key binding
1146  */
1147 protected int
1148 term_clear_arrow(EditLine *el, const char *name)
1149 {
1150         fkey_t *arrow = el->el_term.t_fkey;
1151         int i;
1152
1153         for (i = 0; i < A_K_NKEYS; i++)
1154                 if (strcmp(name, arrow[i].name) == 0) {
1155                         arrow[i].type = XK_NOD;
1156                         return (0);
1157                 }
1158         return (-1);
1159 }
1160
1161
1162 /* term_print_arrow():
1163  *      Print the arrow key bindings
1164  */
1165 protected void
1166 term_print_arrow(EditLine *el, const char *name)
1167 {
1168         int i;
1169         fkey_t *arrow = el->el_term.t_fkey;
1170
1171         for (i = 0; i < A_K_NKEYS; i++)
1172                 if (*name == '\0' || strcmp(name, arrow[i].name) == 0)
1173                         if (arrow[i].type != XK_NOD)
1174                                 key_kprint(el, arrow[i].name, &arrow[i].fun,
1175                                     arrow[i].type);
1176 }
1177
1178
1179 /* term_bind_arrow():
1180  *      Bind the arrow keys
1181  */
1182 protected void
1183 term_bind_arrow(EditLine *el)
1184 {
1185         el_action_t *map;
1186         const el_action_t *dmap;
1187         int i, j;
1188         char *p;
1189         fkey_t *arrow = el->el_term.t_fkey;
1190
1191         /* Check if the components needed are initialized */
1192         if (el->el_term.t_buf == NULL || el->el_map.key == NULL)
1193                 return;
1194
1195         map = el->el_map.type == MAP_VI ? el->el_map.alt : el->el_map.key;
1196         dmap = el->el_map.type == MAP_VI ? el->el_map.vic : el->el_map.emacs;
1197
1198         term_reset_arrow(el);
1199
1200         for (i = 0; i < A_K_NKEYS; i++) {
1201                 p = el->el_term.t_str[arrow[i].key];
1202                 if (p && *p) {
1203                         j = (unsigned char) *p;
1204                         /*
1205                          * Assign the arrow keys only if:
1206                          *
1207                          * 1. They are multi-character arrow keys and the user
1208                          *    has not re-assigned the leading character, or
1209                          *    has re-assigned the leading character to be
1210                          *        ED_SEQUENCE_LEAD_IN
1211                          * 2. They are single arrow keys pointing to an
1212                          *    unassigned key.
1213                          */
1214                         if (arrow[i].type == XK_NOD)
1215                                 key_clear(el, map, p);
1216                         else {
1217                                 if (p[1] && (dmap[j] == map[j] ||
1218                                         map[j] == ED_SEQUENCE_LEAD_IN)) {
1219                                         key_add(el, p, &arrow[i].fun,
1220                                             arrow[i].type);
1221                                         map[j] = ED_SEQUENCE_LEAD_IN;
1222                                 } else if (map[j] == ED_UNASSIGNED) {
1223                                         key_clear(el, map, p);
1224                                         if (arrow[i].type == XK_CMD)
1225                                                 map[j] = arrow[i].fun.cmd;
1226                                         else
1227                                                 key_add(el, p, &arrow[i].fun,
1228                                                     arrow[i].type);
1229                                 }
1230                         }
1231                 }
1232         }
1233 }
1234
1235
1236 /* term__putc():
1237  *      Add a character
1238  */
1239 protected int
1240 term__putc(int c)
1241 {
1242
1243         return (fputc(c, term_outfile));
1244 }
1245
1246
1247 /* term__flush():
1248  *      Flush output
1249  */
1250 protected void
1251 term__flush(void)
1252 {
1253
1254         (void) fflush(term_outfile);
1255 }
1256
1257 /* term_writec():
1258  *      Write the given character out, in a human readable form
1259  */
1260 protected void
1261 term_writec(EditLine *el, int c)
1262 {
1263         char buf[8];
1264         int cnt = key__decode_char(buf, sizeof(buf), 0, c);
1265         buf[cnt] = '\0';
1266         term_overwrite(el, buf, cnt);
1267         term__flush();
1268 }
1269
1270
1271 /* term_telltc():
1272  *      Print the current termcap characteristics
1273  */
1274 protected int
1275 /*ARGSUSED*/
1276 term_telltc(EditLine *el, int argc __attribute__((__unused__)),
1277     const char **argv __attribute__((__unused__)))
1278 {
1279         const struct termcapstr *t;
1280         char **ts;
1281         char upbuf[EL_BUFSIZ];
1282
1283         (void) fprintf(el->el_outfile, "\n\tYour terminal has the\n");
1284         (void) fprintf(el->el_outfile, "\tfollowing characteristics:\n\n");
1285         (void) fprintf(el->el_outfile, "\tIt has %d columns and %d lines\n",
1286             Val(T_co), Val(T_li));
1287         (void) fprintf(el->el_outfile,
1288             "\tIt has %s meta key\n", EL_HAS_META ? "a" : "no");
1289         (void) fprintf(el->el_outfile,
1290             "\tIt can%suse tabs\n", EL_CAN_TAB ? " " : "not ");
1291         (void) fprintf(el->el_outfile, "\tIt %s automatic margins\n",
1292             EL_HAS_AUTO_MARGINS ? "has" : "does not have");
1293         if (EL_HAS_AUTO_MARGINS)
1294                 (void) fprintf(el->el_outfile, "\tIt %s magic margins\n",
1295                     EL_HAS_MAGIC_MARGINS ? "has" : "does not have");
1296
1297         for (t = tstr, ts = el->el_term.t_str; t->name != NULL; t++, ts++) {
1298                 const char *ub;
1299                 if (*ts && **ts) {
1300                     (void) key__decode_str(*ts, upbuf, sizeof(upbuf), "");
1301                     ub = upbuf;
1302                 } else {
1303                     ub = "(empty)";
1304                 }
1305                 (void) fprintf(el->el_outfile, "\t%25s (%s) == %s\n",
1306                     t->long_name, t->name, ub);
1307         }
1308         (void) fputc('\n', el->el_outfile);
1309         return (0);
1310 }
1311
1312
1313 /* term_settc():
1314  *      Change the current terminal characteristics
1315  */
1316 protected int
1317 /*ARGSUSED*/
1318 term_settc(EditLine *el, int argc __attribute__((__unused__)),
1319     const char **argv)
1320 {
1321         const struct termcapstr *ts;
1322         const struct termcapval *tv;
1323         const char *what, *how;
1324
1325         if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
1326                 return -1;
1327
1328         what = argv[1];
1329         how = argv[2];
1330
1331         /*
1332          * Do the strings first
1333          */
1334         for (ts = tstr; ts->name != NULL; ts++)
1335                 if (strcmp(ts->name, what) == 0)
1336                         break;
1337
1338         if (ts->name != NULL) {
1339                 term_alloc(el, ts, how);
1340                 term_setflags(el);
1341                 return 0;
1342         }
1343         /*
1344          * Do the numeric ones second
1345          */
1346         for (tv = tval; tv->name != NULL; tv++)
1347                 if (strcmp(tv->name, what) == 0)
1348                         break;
1349
1350         if (tv->name != NULL)
1351                 return -1;
1352
1353         if (tv == &tval[T_pt] || tv == &tval[T_km] ||
1354             tv == &tval[T_am] || tv == &tval[T_xn]) {
1355                 if (strcmp(how, "yes") == 0)
1356                         el->el_term.t_val[tv - tval] = 1;
1357                 else if (strcmp(how, "no") == 0)
1358                         el->el_term.t_val[tv - tval] = 0;
1359                 else {
1360                         (void) fprintf(el->el_errfile,
1361                             "%s: Bad value `%s'.\n", argv[0], how);
1362                         return -1;
1363                 }
1364                 term_setflags(el);
1365                 if (term_change_size(el, Val(T_li), Val(T_co)) == -1)
1366                         return -1;
1367                 return 0;
1368         } else {
1369                 long i;
1370                 char *ep;
1371
1372                 i = strtol(how, &ep, 10);
1373                 if (*ep != '\0') {
1374                         (void) fprintf(el->el_errfile,
1375                             "%s: Bad value `%s'.\n", argv[0], how);
1376                         return -1;
1377                 }
1378                 el->el_term.t_val[tv - tval] = (int) i;
1379                 el->el_term.t_size.v = Val(T_co);
1380                 el->el_term.t_size.h = Val(T_li);
1381                 if (tv == &tval[T_co] || tv == &tval[T_li])
1382                         if (term_change_size(el, Val(T_li), Val(T_co))
1383                             == -1)
1384                                 return -1;
1385                 return 0;
1386         }
1387 }
1388
1389
1390 /* term_gettc():
1391  *      Get the current terminal characteristics
1392  */
1393 protected int
1394 /*ARGSUSED*/
1395 term_gettc(EditLine *el, int argc __attribute__((__unused__)), char **argv)
1396 {
1397         const struct termcapstr *ts;
1398         const struct termcapval *tv;
1399         char *what;
1400         void *how;
1401
1402         if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
1403                 return (-1);
1404
1405         what = argv[1];
1406         how = argv[2];
1407
1408         /*
1409          * Do the strings first
1410          */
1411         for (ts = tstr; ts->name != NULL; ts++)
1412                 if (strcmp(ts->name, what) == 0)
1413                         break;
1414
1415         if (ts->name != NULL) {
1416                 *(char **)how = el->el_term.t_str[ts - tstr];
1417                 return 0;
1418         }
1419         /*
1420          * Do the numeric ones second
1421          */
1422         for (tv = tval; tv->name != NULL; tv++)
1423                 if (strcmp(tv->name, what) == 0)
1424                         break;
1425
1426         if (tv->name == NULL)
1427                 return -1;
1428
1429         if (tv == &tval[T_pt] || tv == &tval[T_km] ||
1430             tv == &tval[T_am] || tv == &tval[T_xn]) {
1431                 static char yes[] = "yes";
1432                 static char no[] = "no";
1433                 if (el->el_term.t_val[tv - tval])
1434                         *(char **)how = yes;
1435                 else
1436                         *(char **)how = no;
1437                 return 0;
1438         } else {
1439                 *(int *)how = el->el_term.t_val[tv - tval];
1440                 return 0;
1441         }
1442 }
1443
1444 /* term_echotc():
1445  *      Print the termcap string out with variable substitution
1446  */
1447 protected int
1448 /*ARGSUSED*/
1449 term_echotc(EditLine *el, int argc __attribute__((__unused__)),
1450     const char **argv)
1451 {
1452         char *cap, *scap, *ep;
1453         int arg_need, arg_cols, arg_rows;
1454         int verbose = 0, silent = 0;
1455         char *area;
1456         static const char fmts[] = "%s\n", fmtd[] = "%d\n";
1457         const struct termcapstr *t;
1458         char buf[TC_BUFSIZE];
1459         long i;
1460
1461         area = buf;
1462
1463         if (argv == NULL || argv[1] == NULL)
1464                 return (-1);
1465         argv++;
1466
1467         if (argv[0][0] == '-') {
1468                 switch (argv[0][1]) {
1469                 case 'v':
1470                         verbose = 1;
1471                         break;
1472                 case 's':
1473                         silent = 1;
1474                         break;
1475                 default:
1476                         /* stderror(ERR_NAME | ERR_TCUSAGE); */
1477                         break;
1478                 }
1479                 argv++;
1480         }
1481         if (!*argv || *argv[0] == '\0')
1482                 return (0);
1483         if (strcmp(*argv, "tabs") == 0) {
1484                 (void) fprintf(el->el_outfile, fmts, EL_CAN_TAB ? "yes" : "no");
1485                 return (0);
1486         } else if (strcmp(*argv, "meta") == 0) {
1487                 (void) fprintf(el->el_outfile, fmts, Val(T_km) ? "yes" : "no");
1488                 return (0);
1489         } else if (strcmp(*argv, "xn") == 0) {
1490                 (void) fprintf(el->el_outfile, fmts, EL_HAS_MAGIC_MARGINS ?
1491                     "yes" : "no");
1492                 return (0);
1493         } else if (strcmp(*argv, "am") == 0) {
1494                 (void) fprintf(el->el_outfile, fmts, EL_HAS_AUTO_MARGINS ?
1495                     "yes" : "no");
1496                 return (0);
1497         } else if (strcmp(*argv, "baud") == 0) {
1498 #ifdef notdef
1499                 int i;
1500
1501                 for (i = 0; baud_rate[i].b_name != NULL; i++)
1502                         if (el->el_tty.t_speed == baud_rate[i].b_rate) {
1503                                 (void) fprintf(el->el_outfile, fmts,
1504                                     baud_rate[i].b_name);
1505                                 return (0);
1506                         }
1507                 (void) fprintf(el->el_outfile, fmtd, 0);
1508 #else
1509                 (void) fprintf(el->el_outfile, fmtd, (int)el->el_tty.t_speed);
1510 #endif
1511                 return (0);
1512         } else if (strcmp(*argv, "rows") == 0 || strcmp(*argv, "lines") == 0) {
1513                 (void) fprintf(el->el_outfile, fmtd, Val(T_li));
1514                 return (0);
1515         } else if (strcmp(*argv, "cols") == 0) {
1516                 (void) fprintf(el->el_outfile, fmtd, Val(T_co));
1517                 return (0);
1518         }
1519         /*
1520          * Try to use our local definition first
1521          */
1522         scap = NULL;
1523         for (t = tstr; t->name != NULL; t++)
1524                 if (strcmp(t->name, *argv) == 0) {
1525                         scap = el->el_term.t_str[t - tstr];
1526                         break;
1527                 }
1528         if (t->name == NULL) {
1529                 /* XXX: some systems' tgetstr needs non const */
1530                 scap = tgetstr(strchr(*argv, **argv), &area);
1531         }
1532         if (!scap || scap[0] == '\0') {
1533                 if (!silent)
1534                         (void) fprintf(el->el_errfile,
1535                             "echotc: Termcap parameter `%s' not found.\n",
1536                             *argv);
1537                 return (-1);
1538         }
1539         /*
1540          * Count home many values we need for this capability.
1541          */
1542         for (cap = scap, arg_need = 0; *cap; cap++)
1543                 if (*cap == '%')
1544                         switch (*++cap) {
1545                         case 'd':
1546                         case '2':
1547                         case '3':
1548                         case '.':
1549                         case '+':
1550                                 arg_need++;
1551                                 break;
1552                         case '%':
1553                         case '>':
1554                         case 'i':
1555                         case 'r':
1556                         case 'n':
1557                         case 'B':
1558                         case 'D':
1559                                 break;
1560                         default:
1561                                 /*
1562                                  * hpux has lot's of them...
1563                                  */
1564                                 if (verbose)
1565                                         (void) fprintf(el->el_errfile,
1566                                 "echotc: Warning: unknown termcap %% `%c'.\n",
1567                                             *cap);
1568                                 /* This is bad, but I won't complain */
1569                                 break;
1570                         }
1571
1572         switch (arg_need) {
1573         case 0:
1574                 argv++;
1575                 if (*argv && *argv[0]) {
1576                         if (!silent)
1577                                 (void) fprintf(el->el_errfile,
1578                                     "echotc: Warning: Extra argument `%s'.\n",
1579                                     *argv);
1580                         return (-1);
1581                 }
1582                 (void) tputs(scap, 1, term__putc);
1583                 break;
1584         case 1:
1585                 argv++;
1586                 if (!*argv || *argv[0] == '\0') {
1587                         if (!silent)
1588                                 (void) fprintf(el->el_errfile,
1589                                     "echotc: Warning: Missing argument.\n");
1590                         return (-1);
1591                 }
1592                 arg_cols = 0;
1593                 i = strtol(*argv, &ep, 10);
1594                 if (*ep != '\0' || i < 0) {
1595                         if (!silent)
1596                                 (void) fprintf(el->el_errfile,
1597                                     "echotc: Bad value `%s' for rows.\n",
1598                                     *argv);
1599                         return (-1);
1600                 }
1601                 arg_rows = (int) i;
1602                 argv++;
1603                 if (*argv && *argv[0]) {
1604                         if (!silent)
1605                                 (void) fprintf(el->el_errfile,
1606                                     "echotc: Warning: Extra argument `%s'.\n",
1607                                     *argv);
1608                         return (-1);
1609                 }
1610                 (void) tputs(tgoto(scap, arg_cols, arg_rows), 1, term__putc);
1611                 break;
1612         default:
1613                 /* This is wrong, but I will ignore it... */
1614                 if (verbose)
1615                         (void) fprintf(el->el_errfile,
1616                          "echotc: Warning: Too many required arguments (%d).\n",
1617                             arg_need);
1618                 /* FALLTHROUGH */
1619         case 2:
1620                 argv++;
1621                 if (!*argv || *argv[0] == '\0') {
1622                         if (!silent)
1623                                 (void) fprintf(el->el_errfile,
1624                                     "echotc: Warning: Missing argument.\n");
1625                         return (-1);
1626                 }
1627                 i = strtol(*argv, &ep, 10);
1628                 if (*ep != '\0' || i < 0) {
1629                         if (!silent)
1630                                 (void) fprintf(el->el_errfile,
1631                                     "echotc: Bad value `%s' for cols.\n",
1632                                     *argv);
1633                         return (-1);
1634                 }
1635                 arg_cols = (int) i;
1636                 argv++;
1637                 if (!*argv || *argv[0] == '\0') {
1638                         if (!silent)
1639                                 (void) fprintf(el->el_errfile,
1640                                     "echotc: Warning: Missing argument.\n");
1641                         return (-1);
1642                 }
1643                 i = strtol(*argv, &ep, 10);
1644                 if (*ep != '\0' || i < 0) {
1645                         if (!silent)
1646                                 (void) fprintf(el->el_errfile,
1647                                     "echotc: Bad value `%s' for rows.\n",
1648                                     *argv);
1649                         return (-1);
1650                 }
1651                 arg_rows = (int) i;
1652                 if (*ep != '\0') {
1653                         if (!silent)
1654                                 (void) fprintf(el->el_errfile,
1655                                     "echotc: Bad value `%s'.\n", *argv);
1656                         return (-1);
1657                 }
1658                 argv++;
1659                 if (*argv && *argv[0]) {
1660                         if (!silent)
1661                                 (void) fprintf(el->el_errfile,
1662                                     "echotc: Warning: Extra argument `%s'.\n",
1663                                     *argv);
1664                         return (-1);
1665                 }
1666                 (void) tputs(tgoto(scap, arg_cols, arg_rows), arg_rows,
1667                     term__putc);
1668                 break;
1669         }
1670         return (0);
1671 }