common/options.c

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * %sccs.include.redist.c%
   6  */
   7
   8 #ifndef lint
   9 static char sccsid[] = "$Id: options.c,v 8.30 1993/12/10 16:31:23 bostic Exp $ (Berkeley) $Date: 1993/12/10 16:31:23 $";
  10 #endif /* not lint */
  11
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14
  15 #include <ctype.h>
  16 #include <curses.h>
  17 #include <errno.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21
  22 #include "vi.h"
  23 #include "excmd.h"
  24 #include "pathnames.h"
  25
  26 static int               opts_abbcmp __P((const void *, const void *));
  27 static int               opts_cmp __P((const void *, const void *));
  28 static OPTLIST const    *opts_prefix __P((char *));
  29 static int               opts_print __P((SCR *, OPTLIST const *, OPTION *));
  30
  31 /*
  32  * O'Reilly noted options and abbreviations are from "Learning the VI Editor",
  33  * Fifth Edition, May 1992.  There's no way of knowing what systems they are
  34  * actually from.
  35  *
  36  * HPUX noted options and abbreviations are from "The Ultimate Guide to the
  37  * VI and EX Text Editors", 1990.
  38  */
  39 static OPTLIST const optlist[] = {
  40 /* O_ALTWERASE    4.4BSD */
  41         {"altwerase",   f_altwerase,    OPT_0BOOL,      0},
  42 /* O_AUTOINDENT     4BSD */
  43         {"autoindent",  NULL,           OPT_0BOOL,      0},
  44 /* O_AUTOPRINT      4BSD */
  45         {"autoprint",   NULL,           OPT_1BOOL,      0},
  46 /* O_AUTOWRITE      4BSD */
  47         {"autowrite",   NULL,           OPT_0BOOL,      0},
  48 /* O_BEAUTIFY       4BSD */
  49         {"beautify",    NULL,           OPT_0BOOL,      0},
  50 /* O_COLUMNS      4.4BSD */
  51         {"columns",     f_columns,      OPT_NUM,        OPT_NOSAVE},
  52 /* O_COMMENT      4.4BSD */
  53         {"comment",     NULL,           OPT_0BOOL,      0},
  54 /* O_DIGRAPH      XXX: Elvis */
  55         {"digraph",     NULL,           OPT_0BOOL,      0},
  56 /* O_DIRECTORY      4BSD */
  57         {"directory",   NULL,           OPT_STR,        OPT_NOSAVE},
  58 /* O_EDCOMPATIBLE   4BSD */
  59         {"edcompatible",NULL,           OPT_0BOOL,      0},
  60 /* O_ERRORBELLS     4BSD */
  61         {"errorbells",  NULL,           OPT_0BOOL,      0},
  62 /* O_EXRC       System V (undocumented) */
  63         {"exrc",        NULL,           OPT_0BOOL,      0},
  64 /* O_EXTENDED     4.4BSD */
  65         {"extended",    NULL,           OPT_0BOOL,      0},
  66 /* O_FLASH          HPUX */
  67         {"flash",       NULL,           OPT_1BOOL,      0},
  68 /* O_HARDTABS       4BSD */
  69         {"hardtabs",    NULL,           OPT_NUM,        0},
  70 /* O_IGNORECASE     4BSD */
  71         {"ignorecase",  NULL,           OPT_0BOOL,      0},
  72 /* O_KEYTIME      4.4BSD */
  73         {"keytime",     f_keytime,      OPT_NUM,        0},
  74 /* O_LEFTRIGHT    4.4BSD */
  75         {"leftright",   f_leftright,    OPT_0BOOL,      0},
  76 /* O_LINES        4.4BSD */
  77         {"lines",       f_lines,        OPT_NUM,        OPT_NOSAVE},
  78 /* O_LISP           4BSD */
  79         {"lisp",        f_lisp,         OPT_0BOOL,      0},
  80 /* O_LIST           4BSD */
  81         {"list",        f_list,         OPT_0BOOL,      0},
  82 /* O_MAGIC          4BSD */
  83         {"magic",       NULL,           OPT_1BOOL,      0},
  84 /* O_MATCHTIME    4.4BSD */
  85         {"matchtime",   f_matchtime,    OPT_NUM,        0},
  86 /* O_MESG           4BSD */
  87         {"mesg",        f_mesg,         OPT_1BOOL,      0},
  88 /* O_MODELINE       4BSD */
  89         {"modeline",    f_modeline,     OPT_0BOOL,      0},
  90 /* O_NUMBER         4BSD */
  91         {"number",      f_number,       OPT_0BOOL,      0},
  92 /* O_NUNDO        4.4BSD */
  93         {"nundo",       NULL,           OPT_0BOOL,      0},
  94 /* O_OPEN           4BSD */
  95         {"open",        NULL,           OPT_1BOOL,      0},
  96 /* O_OPTIMIZE       4BSD */
  97         {"optimize",    f_optimize,     OPT_1BOOL,      0},
  98 /* O_PARAGRAPHS     4BSD */
  99         {"paragraphs",  f_paragraph,    OPT_STR,        0},
 100 /* O_PROMPT         4BSD */
 101         {"prompt",      NULL,           OPT_1BOOL,      0},
 102 /* O_READONLY       4BSD */
 103         {"readonly",    f_readonly,     OPT_0BOOL,      0},
 104 /* O_REDRAW         4BSD */
 105         {"redraw",      NULL,           OPT_0BOOL,      0},
 106 /* O_REMAP          4BSD */
 107         {"remap",       NULL,           OPT_1BOOL,      0},
 108 /* O_REPORT         4BSD */
 109         {"report",      NULL,           OPT_NUM,        OPT_NOSTR},
 110 /* O_RULER        4.4BSD */
 111         {"ruler",       f_ruler,        OPT_0BOOL,      0},
 112 /* O_SCROLL         4BSD */
 113         {"scroll",      NULL,           OPT_NUM,        0},
 114 /* O_SECTIONS       4BSD */
 115         {"sections",    f_section,      OPT_STR,        0},
 116 /* O_SHELL          4BSD */
 117         {"shell",       NULL,           OPT_STR,        0},
 118 /* O_SHIFTWIDTH     4BSD */
 119         {"shiftwidth",  f_shiftwidth,   OPT_NUM,        0},
 120 /* O_SHOWDIRTY    4.4BSD */
 121         {"showdirty",   NULL,           OPT_0BOOL,      0},
 122 /* O_SHOWMATCH      4BSD */
 123         {"showmatch",   NULL,           OPT_0BOOL,      0},
 124 /* O_SHOWMODE     4.4BSD */
 125         {"showmode",    NULL,           OPT_0BOOL,      0},
 126 /* O_SIDESCROLL   4.4BSD */
 127         {"sidescroll",  f_sidescroll,   OPT_NUM,        0},
 128 /* O_SLOWOPEN       4BSD  */
 129         {"slowopen",    NULL,           OPT_0BOOL,      0},
 130 /* O_SOURCEANY      4BSD (undocumented) */
 131         {"sourceany",   NULL,           OPT_0BOOL,      0},
 132 /* O_TABSTOP        4BSD */
 133         {"tabstop",     f_tabstop,      OPT_NUM,        0},
 134 /* O_TAGLENGTH      4BSD */
 135         {"taglength",   NULL,           OPT_NUM,        OPT_NOSTR},
 136 /* O_TAGS           4BSD */
 137         {"tags",        f_tags,         OPT_STR,        0},
 138 /* O_TERM           4BSD */
 139         {"term",        f_term,         OPT_STR,        OPT_NOSAVE},
 140 /* O_TERSE          4BSD */
 141         {"terse",       NULL,           OPT_0BOOL,      0},
 142 /* O_TIMEOUT        4BSD */
 143         {"timeout",     NULL,           OPT_0BOOL,      0},
 144 /* O_TTYWERASE    4.4BSD */
 145         {"ttywerase",   f_ttywerase,    OPT_0BOOL,      0},
 146 /* O_VERBOSE      4.4BSD */
 147         {"verbose",     NULL,           OPT_0BOOL,      0},
 148 /* O_W1200          4BSD */
 149         {"w1200",       f_w1200,        OPT_NUM,        OPT_NEVER},
 150 /* O_W300           4BSD */
 151         {"w300",        f_w300,         OPT_NUM,        OPT_NEVER},
 152 /* O_W9600          4BSD */
 153         {"w9600",       f_w9600,        OPT_NUM,        OPT_NEVER},
 154 /* O_WARN           4BSD */
 155         {"warn",        NULL,           OPT_1BOOL,      0},
 156 /* O_WINDOW         4BSD */
 157         {"window",      f_window,       OPT_NUM,        0},
 158 /* O_WRAPMARGIN     4BSD */
 159         {"wrapmargin",  f_wrapmargin,   OPT_NUM,        OPT_NOSTR},
 160 /* O_WRAPSCAN       4BSD */
 161         {"wrapscan",    NULL,           OPT_1BOOL,      0},
 162 /* O_WRITEANY       4BSD */
 163         {"writeany",    NULL,           OPT_0BOOL,      0},
 164         {NULL},
 165 };
 166
 167 typedef struct abbrev {
 168         char *name;
 169         int offset;
 170 } OABBREV;
 171
 172 static OABBREV const abbrev[] = {
 173         {"ai",          O_AUTOINDENT},          /*     4BSD */
 174         {"ap",          O_AUTOPRINT},           /*     4BSD */
 175         {"aw",          O_AUTOWRITE},           /*     4BSD */
 176         {"bf",          O_BEAUTIFY},            /*     4BSD */
 177         {"co",          O_COLUMNS},             /*   4.4BSD */
 178         {"dir",         O_DIRECTORY},           /*     4BSD */
 179         {"eb",          O_ERRORBELLS},          /*     4BSD */
 180         {"ed",          O_EDCOMPATIBLE},        /*     4BSD (undocumented) */
 181         {"ex",          O_EXRC},                /* System V (undocumented) */
 182         {"ht",          O_HARDTABS},            /*     4BSD */
 183         {"ic",          O_IGNORECASE},          /*     4BSD */
 184         {"li",          O_LINES},               /*   4.4BSD */
 185         {"modelines",   O_MODELINE},            /*     HPUX */
 186         {"nu",          O_NUMBER},              /*     4BSD */
 187         {"opt",         O_OPTIMIZE},            /*     4BSD */
 188         {"para",        O_PARAGRAPHS},          /*     4BSD */
 189         {"re",          O_REDRAW},              /* O'Reilly */
 190         {"ro",          O_READONLY},            /*     4BSD (undocumented) */
 191         {"scr",         O_SCROLL},              /*     4BSD (undocumented) */
 192         {"sect",        O_SECTIONS},            /* O'Reilly */
 193         {"sh",          O_SHELL},               /*     4BSD */
 194         {"slow",        O_SLOWOPEN},            /*     4BSD */
 195         {"sm",          O_SHOWMATCH},           /*     4BSD */
 196         {"sw",          O_SHIFTWIDTH},          /*     4BSD */
 197         {"tag",         O_TAGS},                /*     4BSD (undocumented) */
 198         {"tl",          O_TAGLENGTH},           /*     4BSD */
 199         {"to",          O_TIMEOUT},             /*     4BSD (undocumented) */
 200         {"ts",          O_TABSTOP},             /*     4BSD */
 201         {"tty",         O_TERM},                /*     4BSD (undocumented) */
 202         {"ttytype",     O_TERM},                /*     4BSD (undocumented) */
 203         {"w",           O_WINDOW},              /* O'Reilly */
 204         {"wa",          O_WRITEANY},            /*     4BSD */
 205         {"wi",          O_WINDOW},              /*     4BSD (undocumented) */
 206         {"wm",          O_WRAPMARGIN},          /*     4BSD */
 207         {"ws",          O_WRAPSCAN},            /*     4BSD */
 208         {NULL},
 209 };
 210
 211 /*
 212  * opts_init --
 213  *      Initialize some of the options.  Since the user isn't really
 214  *      "setting" these variables, don't set their OPT_SET bits.
 215  */
 216 int
 217 opts_init(sp)
 218         SCR *sp;
 219 {
 220         ARGS *argv[2], a, b;
 221         OPTLIST const *op;
 222         u_long v;
 223         int cnt;
 224         char *s, b1[1024];
 225
 226         a.bp = b1;
 227         a.len = 0;
 228         b.bp = NULL;
 229         b.len = 0;
 230         argv[0] = &a;
 231         argv[1] = &b;
 232
 233 #define SET_DEF(opt, str) {                                             \
 234         if (str != b1)          /* GCC puts strings in text-space. */   \
 235                 (void)strcpy(b1, str);                                  \
 236         a.len = strlen(b1);                                             \
 237         if (opts_set(sp, argv)) {                                       \
 238                 msgq(sp, M_ERR,                                         \
 239                     "Unable to set default %s option", optlist[opt]);   \
 240                 return (1);                                             \
 241         }                                                               \
 242         F_CLR(&sp->opts[opt], OPT_SET);                                 \
 243 }
 244         /* Set default values. */
 245         for (op = optlist, cnt = 0; op->name != NULL; ++op, ++cnt)
 246                 if (op->type == OPT_0BOOL)
 247                         O_CLR(sp, cnt);
 248                 else if (op->type == OPT_1BOOL)
 249                         O_SET(sp, cnt);
 250
 251         (void)snprintf(b1, sizeof(b1), "directory=%s",
 252             (s = getenv("TMPDIR")) == NULL ? _PATH_PRESERVE : s);
 253         SET_DEF(O_DIRECTORY, b1);
 254         SET_DEF(O_KEYTIME, "keytime=6");
 255         SET_DEF(O_MATCHTIME, "matchtime=7");
 256         SET_DEF(O_REPORT, "report=5");
 257         SET_DEF(O_PARAGRAPHS, "paragraphs=IPLPPPQPP LIpplpipbp");
 258         (void)snprintf(b1, sizeof(b1), "scroll=%ld", O_VAL(sp, O_LINES) / 2);
 259         SET_DEF(O_SCROLL, b1);
 260         SET_DEF(O_SECTIONS, "sections=NHSHH HUnhsh");
 261         (void)snprintf(b1, sizeof(b1),
 262             "shell=%s", (s = getenv("SHELL")) == NULL ? _PATH_BSHELL : s);
 263         SET_DEF(O_SHELL, b1);
 264         SET_DEF(O_SHIFTWIDTH, "shiftwidth=8");
 265         SET_DEF(O_SIDESCROLL, "sidescroll=16");
 266         SET_DEF(O_TABSTOP, "tabstop=8");
 267         (void)snprintf(b1, sizeof(b1), "tags=%s", _PATH_TAGS);
 268         SET_DEF(O_TAGS, b1);
 269         (void)snprintf(b1, sizeof(b1),
 270             "term=%s", (s = getenv("TERM")) == NULL ? "unknown" : s);
 271         SET_DEF(O_TERM, b1);
 272
 273         /*
 274          * The default window option values are:
 275          *              8 if baud rate <=  600
 276          *             16 if baud rate <= 1200
 277          *      LINES - 1 if baud rate  > 1200
 278          */
 279         v = baud_from_bval(sp);
 280         if (v <= 600)
 281                 v = 8;
 282         else if (v <= 1200)
 283                 v = 16;
 284         else
 285                 v = O_VAL(sp, O_LINES) - 1;
 286         (void)snprintf(b1, sizeof(b1), "window=%lu", v);
 287         SET_DEF(O_WINDOW, b1);
 288
 289         SET_DEF(O_WRAPMARGIN, "wrapmargin=0");
 290
 291         /*
 292          * By default, the historic vi always displayed information
 293          * about two options, redraw and term.  Term seems sufficient.
 294          */
 295         F_SET(&sp->opts[O_TERM], OPT_SET);
 296         return (0);
 297 }
 298
 299 /*
 300  * opts_set --
 301  *      Change the values of one or more options.
 302  */
 303 int
 304 opts_set(sp, argv)
 305         SCR *sp;
 306         ARGS *argv[];
 307 {
 308         enum optdisp disp;
 309         OABBREV atmp, *ap;
 310         OPTLIST const *op;
 311         OPTLIST otmp;
 312         OPTION *spo;
 313         u_long value, turnoff;
 314         int ch, offset, rval;
 315         char *endp, *equals, *name, *p;
 316
 317         disp = NO_DISPLAY;
 318         for (rval = 0; (*argv)->len != 0; ++argv) {
 319                 /*
 320                  * The historic vi dumped the options for each occurrence of
 321                  * "all" in the set list.  Puhleeze.
 322                  */
 323                 if (!strcmp(argv[0]->bp, "all")) {
 324                         disp = ALL_DISPLAY;
 325                         continue;
 326                 }
 327
 328                 /* Find equals sign or end of set, skipping backquoted chars. */
 329                 for (p = name = argv[0]->bp, equals = NULL; ch = *p; ++p)
 330                         switch(ch) {
 331                         case '=':
 332                                 equals = p;
 333                                 break;
 334                         case '\\':
 335                                 /* Historic vi just used the backslash. */
 336                                 if (p[1] == '\0')
 337                                         break;
 338                                 ++p;
 339                                 break;
 340                         }
 341
 342                 turnoff = 0;
 343                 op = NULL;
 344                 if (equals)
 345                         *equals++ = '\0';
 346
 347                 /* Check list of abbreviations. */
 348                 atmp.name = name;
 349                 if ((ap = bsearch(&atmp, abbrev,
 350                     sizeof(abbrev) / sizeof(OABBREV) - 1,
 351                     sizeof(OABBREV), opts_abbcmp)) != NULL) {
 352                         op = optlist + ap->offset;
 353                         goto found;
 354                 }
 355
 356                 /* Check list of options. */
 357                 otmp.name = name;
 358                 if ((op = bsearch(&otmp, optlist,
 359                     sizeof(optlist) / sizeof(OPTLIST) - 1,
 360                     sizeof(OPTLIST), opts_cmp)) != NULL)
 361                         goto found;
 362
 363                 /* Try the name without any leading "no". */
 364                 if (name[0] == 'n' && name[1] == 'o') {
 365                         turnoff = 1;
 366                         name += 2;
 367                 } else
 368                         goto prefix;
 369
 370                 /* Check list of abbreviations. */
 371                 atmp.name = name;
 372                 if ((ap = bsearch(&atmp, abbrev,
 373                     sizeof(abbrev) / sizeof(OABBREV) - 1,
 374                     sizeof(OABBREV), opts_abbcmp)) != NULL) {
 375                         op = optlist + ap->offset;
 376                         goto found;
 377                 }
 378
 379                 /* Check list of options. */
 380                 otmp.name = name;
 381                 if ((op = bsearch(&otmp, optlist,
 382                     sizeof(optlist) / sizeof(OPTLIST) - 1,
 383                     sizeof(OPTLIST), opts_cmp)) != NULL)
 384                         goto found;
 385
 386                 /* Check for prefix match. */
 387 prefix:         op = opts_prefix(name);
 388
 389 found:          if (op == NULL) {
 390                         msgq(sp, M_ERR,
 391                             "no %s option: 'set all' gives all option values",
 392                             name);
 393                         continue;
 394                 }
 395
 396                 /* Find current option values. */
 397                 offset = op - optlist;
 398                 spo = sp->opts + offset;
 399
 400                 /* Set name, value. */
 401                 switch (op->type) {
 402                 case OPT_0BOOL:
 403                 case OPT_1BOOL:
 404                         if (equals) {
 405                                 msgq(sp, M_ERR,
 406                                     "set: [no]%s option doesn't take a value",
 407                                     name);
 408                                 break;
 409                         }
 410                         if (op->func != NULL) {
 411                                 if (op->func(sp, spo, NULL, turnoff)) {
 412                                         rval = 1;
 413                                         break;
 414                                 }
 415                         } else if (turnoff)
 416                                 O_CLR(sp, offset);
 417                         else
 418                                 O_SET(sp, offset);
 419                         goto change;
 420                 case OPT_NUM:
 421                         /*
 422                          * !!!
 423                          * Extension to historic vi.  If the OPT_NOSTR flag is
 424                          * set, a numeric option may be turned off by using a
 425                          * "no" prefix, e.g. "nowrapmargin".  (We assume that
 426                          * setting the value to 0 turns a numeric option off.)
 427                          */
 428                         if (turnoff) {
 429                                 if (F_ISSET(op, OPT_NOSTR)) {
 430                                         value = 0;
 431                                         goto nostr;
 432                                 }
 433                                 msgq(sp, M_ERR,
 434                                     "set: %s option isn't a boolean", name);
 435                                 break;
 436                         }
 437                         if (!equals) {
 438                                 if (!disp)
 439                                         disp = SELECT_DISPLAY;
 440                                 F_SET(spo, OPT_SELECTED);
 441                                 break;
 442                         }
 443                         value = strtol(equals, &endp, 10);
 444                         if (*endp && !isblank(*endp)) {
 445                                 msgq(sp, M_ERR,
 446                                     "set %s: illegal number %s", name, equals);
 447                                 break;
 448                         }
 449 nostr:                  if (op->func != NULL) {
 450                                 if (op->func(sp, spo, equals, value)) {
 451                                         rval = 1;
 452                                         break;
 453                                 }
 454                         } else
 455                                 O_VAL(sp, offset) = value;
 456                         goto change;
 457                 case OPT_STR:
 458                         if (turnoff) {
 459                                 msgq(sp, M_ERR,
 460                                     "set: %s option isn't a boolean", name);
 461                                 break;
 462                         }
 463                         if (!equals) {
 464                                 if (!disp)
 465                                         disp = SELECT_DISPLAY;
 466                                 F_SET(spo, OPT_SELECTED);
 467                                 break;
 468                         }
 469                         if (op->func != NULL) {
 470                                 if (op->func(sp, spo, equals, (u_long)0)) {
 471                                         rval = 1;
 472                                         break;
 473                                 }
 474                         } else {
 475                                 if (F_ISSET(&sp->opts[offset], OPT_ALLOCATED))
 476                                         free(O_STR(sp, offset));
 477                                 if ((O_STR(sp, offset) =
 478                                     strdup(equals)) == NULL) {
 479                                         msgq(sp, M_SYSERR, NULL);
 480                                         rval = 1;
 481                                         break;
 482                                 } else
 483                                         F_SET(&sp->opts[offset], OPT_ALLOCATED);
 484                         }
 485 change:                 if (sp->s_optchange != NULL)
 486                                 (void)sp->s_optchange(sp, offset);
 487                         F_SET(&sp->opts[offset], OPT_SET);
 488                         break;
 489                 default:
 490                         abort();
 491                 }
 492         }
 493         if (disp)
 494                 opts_dump(sp, disp);
 495         return (rval);
 496 }
 497
 498 /*
 499  * opts_dump --
 500  *      List the current values of selected options.
 501  */
 502 void
 503 opts_dump(sp, type)
 504         SCR *sp;
 505         enum optdisp type;
 506 {
 507         OPTLIST const *op;
 508         int base, b_num, chcnt, cnt, col, colwidth, curlen, endcol, s_num;
 509         int numcols, numrows, row, tablen, termwidth;
 510         int b_op[O_OPTIONCOUNT], s_op[O_OPTIONCOUNT];
 511         char nbuf[20];
 512
 513         /*
 514          * Options are output in two groups -- those that fit at least two to
 515          * a line and those that don't.  We do output on tab boundaries for no
 516          * particular reason.   First get the set of options to list, keeping
 517          * track of the length of each.  No error checking, because we know
 518          * that O_TERM was set so at least one option has the OPT_SET bit on.
 519          * Termwidth is the tab stop before half of the line in the first loop,
 520          * and the full line length later on.
 521          */
 522         colwidth = -1;
 523         tablen = O_VAL(sp, O_TABSTOP);
 524         termwidth = (sp->cols - 1) / 2 & ~(tablen - 1);
 525         for (b_num = s_num = 0, op = optlist; op->name; ++op) {
 526                 cnt = op - optlist;
 527
 528                 /* If OPT_NEVER set, it's never displayed. */
 529                 if (F_ISSET(op, OPT_NEVER))
 530                         continue;
 531
 532                 switch (type) {
 533                 case ALL_DISPLAY:               /* Display all. */
 534                         break;
 535                 case CHANGED_DISPLAY:           /* Display changed. */
 536                         if (!F_ISSET(&sp->opts[cnt], OPT_SET))
 537                                 continue;
 538                         break;
 539                 case SELECT_DISPLAY:            /* Display selected. */
 540                         if (!F_ISSET(&sp->opts[cnt], OPT_SELECTED))
 541                                 continue;
 542                         break;
 543                 default:
 544                 case NO_DISPLAY:
 545                         abort();
 546                         /* NOTREACHED */
 547                 }
 548                 F_CLR(&sp->opts[cnt], OPT_SELECTED);
 549
 550                 curlen = strlen(op->name);
 551                 switch (op->type) {
 552                 case OPT_0BOOL:
 553                 case OPT_1BOOL:
 554                         if (!O_ISSET(sp, cnt))
 555                                 curlen += 2;
 556                         break;
 557                 case OPT_NUM:
 558                         (void)snprintf(nbuf,
 559                             sizeof(nbuf), "%ld", O_VAL(sp, cnt));
 560                         curlen += strlen(nbuf);
 561                         break;
 562                 case OPT_STR:
 563                         curlen += strlen(O_STR(sp, cnt)) + 3;
 564                         break;
 565                 }
 566                 if (curlen < termwidth) {
 567                         if (colwidth < curlen)
 568                                 colwidth = curlen;
 569                         s_op[s_num++] = cnt;
 570                 } else
 571                         b_op[b_num++] = cnt;
 572         }
 573
 574         colwidth = (colwidth + tablen) & ~(tablen - 1);
 575         termwidth = sp->cols - 1;
 576         numcols = termwidth / colwidth;
 577         if (s_num > numcols) {
 578                 numrows = s_num / numcols;
 579                 if (s_num % numcols)
 580                         ++numrows;
 581         } else
 582                 numrows = 1;
 583
 584         for (row = 0; row < numrows;) {
 585                 endcol = colwidth;
 586                 for (base = row, chcnt = col = 0; col < numcols; ++col) {
 587                         chcnt += opts_print(sp,
 588                             &optlist[s_op[base]], &sp->opts[s_op[base]]);
 589                         if ((base += numrows) >= s_num)
 590                                 break;
 591                         while ((cnt =
 592                             (chcnt + tablen & ~(tablen - 1))) <= endcol) {
 593                                 (void)ex_printf(EXCOOKIE, "\t");
 594                                 chcnt = cnt;
 595                         }
 596                         endcol += colwidth;
 597                 }
 598                 if (++row < numrows || b_num)
 599                         (void)ex_printf(EXCOOKIE, "\n");
 600         }
 601
 602         for (row = 0; row < b_num;) {
 603                 (void)opts_print(sp, &optlist[b_op[row]], &sp->opts[b_op[row]]);
 604                 if (++row < b_num)
 605                         (void)ex_printf(EXCOOKIE, "\n");
 606         }
 607         (void)ex_printf(EXCOOKIE, "\n");
 608 }
 609
 610 /*
 611  * opts_print --
 612  *      Print out an option.
 613  */
 614 static int
 615 opts_print(sp, op, spo)
 616         SCR *sp;
 617         OPTLIST const *op;
 618         OPTION *spo;
 619 {
 620         int curlen, offset;
 621
 622         curlen = 0;
 623         offset = op - optlist;
 624         switch (op->type) {
 625         case OPT_0BOOL:
 626         case OPT_1BOOL:
 627                 curlen += ex_printf(EXCOOKIE,
 628                     "%s%s", O_ISSET(sp, offset) ? "" : "no", op->name);
 629                 break;
 630         case OPT_NUM:
 631                 curlen += ex_printf(EXCOOKIE,
 632                      "%s=%ld", op->name, O_VAL(sp, offset));
 633                 break;
 634         case OPT_STR:
 635                 curlen += ex_printf(EXCOOKIE,
 636                     "%s=\"%s\"", op->name, O_STR(sp, offset));
 637                 break;
 638         }
 639         return (curlen);
 640 }
 641
 642 /*
 643  * opts_save --
 644  *      Write the current configuration to a file.
 645  */
 646 int
 647 opts_save(sp, fp)
 648         SCR *sp;
 649         FILE *fp;
 650 {
 651         OPTION *spo;
 652         OPTLIST const *op;
 653         int ch, cnt;
 654         char *p;
 655
 656         for (spo = sp->opts, op = optlist; op->name; ++op) {
 657                 if (F_ISSET(op, OPT_NOSAVE))
 658                         continue;
 659                 cnt = op - optlist;
 660                 switch (op->type) {
 661                 case OPT_0BOOL:
 662                 case OPT_1BOOL:
 663                         if (O_ISSET(sp, cnt))
 664                                 (void)fprintf(fp, "set %s\n", op->name);
 665                         else
 666                                 (void)fprintf(fp, "set no%s\n", op->name);
 667                         break;
 668                 case OPT_NUM:
 669                         (void)fprintf(fp,
 670                             "set %s=%-3d\n", op->name, O_VAL(sp, cnt));
 671                         break;
 672                 case OPT_STR:
 673                         (void)fprintf(fp, "set ");
 674                         for (p = op->name; (ch = *p) != '\0'; ++p) {
 675                                 if (isblank(ch))
 676                                         (void)putc('\\', fp);
 677                                 (void)putc(ch, fp);
 678                         }
 679                         (void)putc('=', fp);
 680                         for (p = O_STR(sp, cnt); (ch = *p) != '\0'; ++p) {
 681                                 if (isblank(ch))
 682                                         (void)putc('\\', fp);
 683                                 (void)putc(ch, fp);
 684                         }
 685                         (void)putc('\n', fp);
 686                         break;
 687                 }
 688                 if (ferror(fp)) {
 689                         msgq(sp, M_ERR, "I/O error: %s", strerror(errno));
 690                         return (1);
 691                 }
 692         }
 693         return (0);
 694 }
 695
 696 /*
 697  * opts_prefix --
 698  *      Check to see if the name is the prefix of one (and only one)
 699  *      option.  If so, return the option.
 700  */
 701 static OPTLIST const *
 702 opts_prefix(name)
 703         char *name;
 704 {
 705         OPTLIST const *op, *save_op;
 706         size_t len;
 707
 708         save_op = NULL;
 709         len = strlen(name);
 710         for (op = optlist; op->name != NULL; ++op) {
 711                 if (op->name[0] < name[0])
 712                         continue;
 713                 if (op->name[0] > name[0])
 714                         break;
 715                 if (!memcmp(op->name, name, len)) {
 716                         if (save_op != NULL)
 717                                 return (NULL);
 718                         save_op = op;
 719                 }
 720         }
 721         return (save_op);
 722 }
 723
 724 static int
 725 opts_abbcmp(a, b)
 726         const void *a, *b;
 727 {
 728         return(strcmp(((OABBREV *)a)->name, ((OABBREV *)b)->name));
 729 }
 730
 731 static int
 732 opts_cmp(a, b)
 733         const void *a, *b;
 734 {
 735         return(strcmp(((OPTLIST *)a)->name, ((OPTLIST *)b)->name));
 736 }
 737
 738 /*
 739  * opts_free --
 740  *      Free all option strings
 741  */
 742 void
 743 opts_free(sp)
 744         SCR *sp;
 745 {
 746         int cnt;
 747         char *p;
 748
 749         for (cnt = 0; cnt < O_OPTIONCOUNT; ++cnt)
 750                 if (F_ISSET(&sp->opts[cnt], OPT_ALLOCATED)) {
 751                         p = O_STR(sp, cnt);
 752                         FREE(p, strlen(p) + 1);
 753                 }
 754 }
 755
 756 /*
 757  * opts_copy --
 758  *      Copy a screen's OPTION array.
 759  */
 760 int
 761 opts_copy(orig, sp)
 762         SCR *orig, *sp;
 763 {
 764         OPTION *op;
 765         int cnt;
 766
 767         /* Copy most everything without change. */
 768         memmove(sp->opts, orig->opts, sizeof(orig->opts));
 769
 770         /*
 771          * Allocate copies of the strings -- keep trying to reallocate
 772          * after ENOMEM failure, otherwise end up with more than one
 773          * screen referencing the original memory.
 774          */
 775         for (op = sp->opts, cnt = 0; cnt < O_OPTIONCOUNT; ++cnt, ++op)
 776                 if (F_ISSET(&sp->opts[cnt], OPT_ALLOCATED) &&
 777                     (O_STR(sp, cnt) = strdup(O_STR(sp, cnt))) == NULL) {
 778                         msgq(orig, M_SYSERR, NULL);
 779                         return (1);
 780                 }
 781         return (0);
 782 }