dist/nvi/common/msg.c

   1 /*      $NetBSD: msg.c,v 1.2 2008/12/05 22:51:42 christos Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1991, 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 static const char sccsid[] = "Id: msg.c,v 10.61 2003/07/18 23:17:30 skimo Exp (Berkeley) Date: 2003/07/18 23:17:30";
  16 #endif /* not lint */
  17
  18 #include <sys/param.h>
  19 #include <sys/types.h>          /* XXX: param.h may not have included types.h */
  20 #include <sys/queue.h>
  21 #include <sys/stat.h>
  22 #include <sys/time.h>
  23
  24 #include <bitstring.h>
  25 #include <ctype.h>
  26 #include <errno.h>
  27 #include <fcntl.h>
  28 #include <limits.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33
  34 #ifdef __STDC__
  35 #include <stdarg.h>
  36 #else
  37 #include <varargs.h>
  38 #endif
  39
  40 #include "common.h"
  41 #include "dbinternal.h"
  42 #include "../vi/vi.h"
  43
  44 /*
  45  * msgq --
  46  *      Display a message.
  47  *
  48  * PUBLIC: void msgq __P((SCR *, mtype_t, const char *, ...));
  49  */
  50 void
  51 #ifdef __STDC__
  52 msgq(SCR *sp, mtype_t mt, const char *fmt, ...)
  53 #else
  54 msgq(sp, mt, fmt, va_alist)
  55         SCR *sp;
  56         mtype_t mt;
  57         const char *fmt;
  58         va_dcl
  59 #endif
  60 {
  61 #ifndef NL_ARGMAX
  62 #define __NL_ARGMAX     20              /* Set to 9 by System V. */
  63         struct {
  64                 const char *str;        /* String pointer. */
  65                 size_t   arg;           /* Argument number. */
  66                 size_t   prefix;        /* Prefix string length. */
  67                 size_t   skip;          /* Skipped string length. */
  68                 size_t   suffix;        /* Suffix string length. */
  69         } str[__NL_ARGMAX];
  70 #endif
  71         static int reenter;             /* STATIC: Re-entrancy check. */
  72         GS *gp;
  73         WIN *wp = NULL;
  74         size_t blen, len, mlen, nlen;
  75         const char *p;
  76         char *bp, *mp;
  77         va_list ap;
  78 #ifndef NL_ARGMAX
  79         CHAR_T ch;
  80         char *rbp, *s_rbp;
  81         const char *t, *u;
  82         size_t cnt1, cnt2, soff;
  83 #endif
  84
  85         /*
  86          * !!!
  87          * It's possible to enter msg when there's no screen to hold the
  88          * message.  If sp is NULL, ignore the special cases and put the
  89          * message out to stderr.
  90          */
  91         if (sp == NULL) {
  92                 gp = NULL;
  93                 if (mt == M_BERR)
  94                         mt = M_ERR;
  95                 else if (mt == M_VINFO)
  96                         mt = M_INFO;
  97         } else {
  98                 gp = sp->gp;
  99                 wp = sp->wp;
 100                 switch (mt) {
 101                 case M_BERR:
 102                         if (F_ISSET(sp, SC_VI) && !O_ISSET(sp, O_VERBOSE)) {
 103                                 F_SET(gp, G_BELLSCHED);
 104                                 return;
 105                         }
 106                         mt = M_ERR;
 107                         break;
 108                 case M_VINFO:
 109                         if (!O_ISSET(sp, O_VERBOSE))
 110                                 return;
 111                         mt = M_INFO;
 112                         /* FALLTHROUGH */
 113                 case M_INFO:
 114                         if (F_ISSET(sp, SC_EX_SILENT))
 115                                 return;
 116                         break;
 117                 case M_ERR:
 118                 case M_SYSERR:
 119                 case M_DBERR:
 120                         break;
 121                 default:
 122                         abort();
 123                 }
 124         }
 125
 126         /*
 127          * It's possible to reenter msg when it allocates space.  We're
 128          * probably dead anyway, but there's no reason to drop core.
 129          *
 130          * XXX
 131          * Yes, there's a race, but it should only be two instructions.
 132          */
 133         if (reenter++)
 134                 return;
 135
 136         /* Get space for the message. */
 137         nlen = 1024;
 138         if (0) {
 139 retry:          FREE_SPACE(sp, bp, blen);
 140                 nlen *= 2;
 141         }
 142         bp = NULL;
 143         blen = 0;
 144         GET_SPACE_GOTOC(sp, bp, blen, nlen);
 145
 146         /*
 147          * Error prefix.
 148          *
 149          * mp:   pointer to the current next character to be written
 150          * mlen: length of the already written characters
 151          * blen: total length of the buffer
 152          */
 153 #define REM     (blen - mlen)
 154         mp = bp;
 155         mlen = 0;
 156         if (mt == M_SYSERR || mt == M_DBERR) {
 157                 p = msg_cat(sp, "020|Error: ", &len);
 158                 if (REM < len)
 159                         goto retry;
 160                 memcpy(mp, p, len);
 161                 mp += len;
 162                 mlen += len;
 163         }
 164
 165         /*
 166          * If we're running an ex command that the user didn't enter, display
 167          * the file name and line number prefix.
 168          */
 169         if ((mt == M_ERR || mt == M_SYSERR) &&
 170             sp != NULL && wp != NULL && wp->if_name != NULL) {
 171                 for (p = wp->if_name; *p != '\0'; ++p) {
 172                         len = snprintf(mp, REM, "%s", KEY_NAME(sp, *p));
 173                         mp += len;
 174                         if ((mlen += len) > blen)
 175                                 goto retry;
 176                 }
 177                 len = snprintf(mp, REM, ", %d: ", wp->if_lno);
 178                 mp += len;
 179                 if ((mlen += len) > blen)
 180                         goto retry;
 181         }
 182
 183         /* If nothing to format, we're done. */
 184         if (fmt == NULL)
 185                 goto nofmt;
 186         fmt = msg_cat(sp, fmt, NULL);
 187
 188 #ifndef NL_ARGMAX
 189         /*
 190          * Nvi should run on machines that don't support the numbered argument
 191          * specifications (%[digit]*$).  We do this by reformatting the string
 192          * so that we can hand it to vsprintf(3) and it will use the arguments
 193          * in the right order.  When vsprintf returns, we put the string back
 194          * into the right order.  It's undefined, according to SVID III, to mix
 195          * numbered argument specifications with the standard style arguments,
 196          * so this should be safe.
 197          *
 198          * In addition, we also need a character that is known to not occur in
 199          * any vi message, for separating the parts of the string.  As callers
 200          * of msgq are responsible for making sure that all the non-printable
 201          * characters are formatted for printing before calling msgq, we use a
 202          * random non-printable character selected at terminal initialization
 203          * time.  This code isn't fast by any means, but as messages should be
 204          * relatively short and normally have only a few arguments, it won't be
 205          * too bad.  Regardless, nobody has come up with any other solution.
 206          *
 207          * The result of this loop is an array of pointers into the message
 208          * string, with associated lengths and argument numbers.  The array
 209          * is in the "correct" order, and the arg field contains the argument
 210          * order.
 211          */
 212         for (p = fmt, soff = 0; soff < __NL_ARGMAX;) {
 213                 for (t = p; *p != '\0' && *p != '%'; ++p);
 214                 if (*p == '\0')
 215                         break;
 216                 ++p;
 217                 if (!isdigit(*p)) {
 218                         if (*p == '%')
 219                                 ++p;
 220                         continue;
 221                 }
 222                 for (u = p; *++p != '\0' && isdigit(*p););
 223                 if (*p != '$')
 224                         continue;
 225
 226                 /* Up to, and including the % character. */
 227                 str[soff].str = t;
 228                 str[soff].prefix = u - t;
 229
 230                 /* Up to, and including the $ character. */
 231                 str[soff].arg = atoi(u);
 232                 str[soff].skip = (p - u) + 1;
 233                 if (str[soff].arg >= __NL_ARGMAX)
 234                         goto ret;
 235
 236                 /* Up to, and including the conversion character. */
 237                 for (u = p; (ch = *++p) != '\0';)
 238                         if (isalpha(ch) &&
 239                             strchr("diouxXfeEgGcspn", ch) != NULL)
 240                                 break;
 241                 str[soff].suffix = p - u;
 242                 if (ch != '\0')
 243                         ++p;
 244                 ++soff;
 245         }
 246
 247         /* If no magic strings, we're done. */
 248         if (soff == 0)
 249                 goto format;
 250
 251          /* Get space for the reordered strings. */
 252         if ((rbp = malloc(nlen)) == NULL)
 253                 goto ret;
 254         s_rbp = rbp;
 255
 256         /*
 257          * Reorder the strings into the message string based on argument
 258          * order.
 259          *
 260          * !!!
 261          * We ignore arguments that are out of order, i.e. if we don't find
 262          * an argument, we continue.  Assume (almost certainly incorrectly)
 263          * that whoever created the string knew what they were doing.
 264          *
 265          * !!!
 266          * Brute force "sort", but since we don't expect more than one or two
 267          * arguments in a string, the setup cost of a fast sort will be more
 268          * expensive than the loop.
 269          */
 270         for (cnt1 = 1; cnt1 <= soff; ++cnt1)
 271                 for (cnt2 = 0; cnt2 < soff; ++cnt2)
 272                         if (cnt1 == str[cnt2].arg) {
 273                                 memmove(s_rbp, str[cnt2].str, str[cnt2].prefix);
 274                                 memmove(s_rbp + str[cnt2].prefix,
 275                                     str[cnt2].str + str[cnt2].prefix +
 276                                     str[cnt2].skip, str[cnt2].suffix);
 277                                 s_rbp += str[cnt2].prefix + str[cnt2].suffix;
 278                                 *s_rbp++ =
 279                                     gp == NULL ? DEFAULT_NOPRINT : gp->noprint;
 280                                 break;
 281                         }
 282         *s_rbp = '\0';
 283         fmt = rbp;
 284 #endif
 285
 286 #ifndef NL_ARGMAX
 287 format: /* Format the arguments into the string. */
 288 #endif
 289 #ifdef __STDC__
 290         va_start(ap, fmt);
 291 #else
 292         va_start(ap);
 293 #endif
 294         len = vsnprintf(mp, REM, fmt, ap);
 295         va_end(ap);
 296         if (len >= nlen)
 297                 goto retry;
 298
 299 #ifndef NL_ARGMAX
 300         if (soff == 0)
 301                 goto nofmt;
 302
 303         /*
 304          * Go through the resulting string, and, for each separator character
 305          * separated string, enter its new starting position and length in the
 306          * array.
 307          */
 308         for (p = t = mp, cnt1 = 1,
 309             ch = gp == NULL ? DEFAULT_NOPRINT : gp->noprint; *p != '\0'; ++p)
 310                 if (*p == ch) {
 311                         for (cnt2 = 0; cnt2 < soff; ++cnt2)
 312                                 if (str[cnt2].arg == cnt1)
 313                                         break;
 314                         str[cnt2].str = t;
 315                         str[cnt2].prefix = p - t;
 316                         t = p + 1;
 317                         ++cnt1;
 318                 }
 319
 320         /*
 321          * Reorder the strings once again, putting them back into the
 322          * message buffer.
 323          *
 324          * !!!
 325          * Note, the length of the message gets decremented once for
 326          * each substring, when we discard the separator character.
 327          */
 328         for (s_rbp = rbp, cnt1 = 0; cnt1 < soff; ++cnt1) {
 329                 memmove(rbp, str[cnt1].str, str[cnt1].prefix);
 330                 rbp += str[cnt1].prefix;
 331                 --len;
 332         }
 333         memmove(mp, s_rbp, rbp - s_rbp);
 334
 335         /* Free the reordered string memory. */
 336         free(s_rbp);
 337 #endif
 338
 339 nofmt:  mp += len;
 340         if ((mlen += len) > blen)
 341                 goto retry;
 342         if (mt == M_SYSERR) {
 343                 len = snprintf(mp, REM, ": %s", strerror(errno));
 344                 mp += len;
 345                 if ((mlen += len) > blen)
 346                         goto retry;
 347                 mt = M_ERR;
 348         }
 349         if (mt == M_DBERR) {
 350                 len = snprintf(mp, REM, ": %s", db_strerror(sp->db_error));
 351                 mp += len;
 352                 if ((mlen += len) > blen)
 353                         goto retry;
 354                 mt = M_ERR;
 355         }
 356
 357         /* Add trailing newline. */
 358         if ((mlen += 1) > blen)
 359                 goto retry;
 360         *mp = '\n';
 361
 362         if (sp != NULL && sp->ep != NULL)
 363                 (void)ex_fflush(sp);
 364         if (wp != NULL)
 365                 wp->scr_msg(sp, mt, bp, mlen);
 366         else
 367                 (void)fprintf(stderr, "%.*s", (int)mlen, bp);
 368
 369         /* Cleanup. */
 370 #ifndef NL_ARGMAX
 371 ret:
 372 #endif
 373         FREE_SPACE(sp, bp, blen);
 374 alloc_err:
 375         reenter = 0;
 376 }
 377
 378 /*
 379  * msgq_str --
 380  *      Display a message with an embedded string.
 381  *
 382  * PUBLIC: void msgq_wstr __P((SCR *, mtype_t, const CHAR_T *, const char *));
 383  */
 384 void
 385 msgq_wstr(SCR *sp, mtype_t mtype, const CHAR_T *str, const char *fmt)
 386 {
 387         size_t nlen;
 388         const char *nstr;
 389
 390         if (str == NULL) {
 391                 msgq(sp, mtype, fmt);
 392                 return;
 393         }
 394         INT2CHAR(sp, str, STRLEN(str) + 1, nstr, nlen);
 395         msgq_str(sp, mtype, nstr, fmt);
 396 }
 397
 398 /*
 399  * msgq_str --
 400  *      Display a message with an embedded string.
 401  *
 402  * PUBLIC: void msgq_str __P((SCR *, mtype_t, char *, char *));
 403  */
 404 void
 405 msgq_str(SCR *sp, mtype_t mtype, const char *str, const char *fmt)
 406 {
 407         int nf, sv_errno;
 408         char *p;
 409
 410         if (str == NULL) {
 411                 msgq(sp, mtype, fmt);
 412                 return;
 413         }
 414
 415         sv_errno = errno;
 416         p = msg_print(sp, str, &nf);
 417         errno = sv_errno;
 418         msgq(sp, mtype, fmt, p);
 419         if (nf)
 420                 FREE_SPACE(sp, p, 0);
 421 }
 422
 423 /*
 424  * mod_rpt --
 425  *      Report on the lines that changed.
 426  *
 427  * !!!
 428  * Historic vi documentation (USD:15-8) claimed that "The editor will also
 429  * always tell you when a change you make affects text which you cannot see."
 430  * This wasn't true -- edit a large file and do "100d|1".  We don't implement
 431  * this semantic since it requires tracking each line that changes during a
 432  * command instead of just keeping count.
 433  *
 434  * Line counts weren't right in historic vi, either.  For example, given the
 435  * file:
 436  *      abc
 437  *      def
 438  * the command 2d}, from the 'b' would report that two lines were deleted,
 439  * not one.
 440  *
 441  * PUBLIC: void mod_rpt __P((SCR *));
 442  */
 443 void
 444 mod_rpt(SCR *sp)
 445 {
 446         static const char * const action[] = {
 447                 "293|added",
 448                 "294|changed",
 449                 "295|deleted",
 450                 "296|joined",
 451                 "297|moved",
 452                 "298|shifted",
 453                 "299|yanked",
 454         };
 455         static const char * const lines[] = {
 456                 "300|line",
 457                 "301|lines",
 458         };
 459         db_recno_t total;
 460         u_long rptval;
 461         int first;
 462         size_t cnt, blen, len, tlen;
 463         const char *t;
 464         const char * const *ap;
 465         char *bp, *p;
 466
 467         /* Change reports are turned off in batch mode. */
 468         if (F_ISSET(sp, SC_EX_SILENT))
 469                 return;
 470
 471         /* Reset changing line number. */
 472         sp->rptlchange = OOBLNO;
 473
 474         /*
 475          * Don't build a message if not enough changed.
 476          *
 477          * !!!
 478          * And now, a vi clone test.  Historically, vi reported if the number
 479          * of changed lines was > than the value, not >=, unless it was a yank
 480          * command, which used >=.  No lie.  Furthermore, an action was never
 481          * reported for a single line action.  This is consistent for actions
 482          * other than yank, but yank didn't report single line actions even if
 483          * the report edit option was set to 1.  In addition, setting report to
 484          * 0 in the 4BSD historic vi was equivalent to setting it to 1, for an
 485          * unknown reason (this bug was fixed in System III/V at some point).
 486          * I got complaints, so nvi conforms to System III/V historic practice
 487          * except that we report a yank of 1 line if report is set to 1.
 488          */
 489 #define ARSIZE(a)       sizeof(a) / sizeof (*a)
 490 #define MAXNUM          25
 491         rptval = O_VAL(sp, O_REPORT);
 492         for (cnt = 0, total = 0; cnt < ARSIZE(action); ++cnt)
 493                 total += sp->rptlines[cnt];
 494         if (total == 0)
 495                 return;
 496         if (total <= rptval && sp->rptlines[L_YANKED] < rptval) {
 497                 for (cnt = 0; cnt < ARSIZE(action); ++cnt)
 498                         sp->rptlines[cnt] = 0;
 499                 return;
 500         }
 501
 502         /* Build and display the message. */
 503         GET_SPACE_GOTOC(sp, bp, blen, sizeof(action) * MAXNUM + 1);
 504         for (p = bp, first = 1, tlen = 0,
 505             ap = action, cnt = 0; cnt < ARSIZE(action); ++ap, ++cnt)
 506                 if (sp->rptlines[cnt] != 0) {
 507                         if (first)
 508                                 first = 0;
 509                         else {
 510                                 *p++ = ';';
 511                                 *p++ = ' ';
 512                                 tlen += 2;
 513                         }
 514                         len = snprintf(p, MAXNUM, "%lu ",
 515                                 (unsigned long) sp->rptlines[cnt]);
 516                         p += len;
 517                         tlen += len;
 518                         t = msg_cat(sp,
 519                             lines[sp->rptlines[cnt] == 1 ? 0 : 1], &len);
 520                         memcpy(p, t, len);
 521                         p += len;
 522                         tlen += len;
 523                         *p++ = ' ';
 524                         ++tlen;
 525                         t = msg_cat(sp, *ap, &len);
 526                         memcpy(p, t, len);
 527                         p += len;
 528                         tlen += len;
 529                         sp->rptlines[cnt] = 0;
 530                 }
 531
 532         /* Add trailing newline. */
 533         *p = '\n';
 534         ++tlen;
 535
 536         (void)ex_fflush(sp);
 537         sp->wp->scr_msg(sp, M_INFO, bp, tlen);
 538
 539         FREE_SPACE(sp, bp, blen);
 540 alloc_err:
 541         return;
 542
 543 #undef ARSIZE
 544 #undef MAXNUM
 545 }
 546
 547 /*
 548  * msgq_status --
 549  *      Report on the file's status.
 550  *
 551  * PUBLIC: void msgq_status __P((SCR *, db_recno_t, u_int));
 552  */
 553 void
 554 msgq_status(SCR *sp, db_recno_t lno, u_int flags)
 555 {
 556         db_recno_t last;
 557         size_t blen, len;
 558         int cnt, needsep;
 559         const char *t;
 560         char **ap, *bp, *np, *p, *s;
 561
 562         /* Get sufficient memory. */
 563         len = strlen(sp->frp->name);
 564         GET_SPACE_GOTOC(sp, bp, blen, len * MAX_CHARACTER_COLUMNS + 128);
 565         p = bp;
 566
 567         /* Copy in the filename. */
 568         for (p = bp, t = sp->frp->name; *t != '\0'; ++t) {
 569                 len = KEY_LEN(sp, *t);
 570                 memcpy(p, KEY_NAME(sp, *t), len);
 571                 p += len;
 572         }
 573         np = p;
 574         *p++ = ':';
 575         *p++ = ' ';
 576
 577         /* Copy in the argument count. */
 578         if (F_ISSET(sp, SC_STATUS_CNT) && sp->argv != NULL) {
 579                 for (cnt = 0, ap = sp->argv; *ap != NULL; ++ap, ++cnt);
 580                 if (cnt > 1) {
 581                         (void)sprintf(p,
 582                             msg_cat(sp, "317|%d files to edit", NULL), cnt);
 583                         p += strlen(p);
 584                         *p++ = ':';
 585                         *p++ = ' ';
 586                 }
 587                 F_CLR(sp, SC_STATUS_CNT);
 588         }
 589
 590         /*
 591          * See nvi/exf.c:file_init() for a description of how and when the
 592          * read-only bit is set.
 593          *
 594          * !!!
 595          * The historic display for "name changed" was "[Not edited]".
 596          */
 597         needsep = 0;
 598         if (F_ISSET(sp->frp, FR_NEWFILE)) {
 599                 F_CLR(sp->frp, FR_NEWFILE);
 600                 t = msg_cat(sp, "021|new file", &len);
 601                 memcpy(p, t, len);
 602                 p += len;
 603                 needsep = 1;
 604         } else {
 605                 if (F_ISSET(sp->frp, FR_NAMECHANGE)) {
 606                         t = msg_cat(sp, "022|name changed", &len);
 607                         memcpy(p, t, len);
 608                         p += len;
 609                         needsep = 1;
 610                 }
 611                 if (needsep) {
 612                         *p++ = ',';
 613                         *p++ = ' ';
 614                 }
 615                 if (F_ISSET(sp->ep, F_MODIFIED))
 616                         t = msg_cat(sp, "023|modified", &len);
 617                 else
 618                         t = msg_cat(sp, "024|unmodified", &len);
 619                 memcpy(p, t, len);
 620                 p += len;
 621                 needsep = 1;
 622         }
 623         if (F_ISSET(sp->frp, FR_UNLOCKED)) {
 624                 if (needsep) {
 625                         *p++ = ',';
 626                         *p++ = ' ';
 627                 }
 628                 t = msg_cat(sp, "025|UNLOCKED", &len);
 629                 memcpy(p, t, len);
 630                 p += len;
 631                 needsep = 1;
 632         }
 633         if (O_ISSET(sp, O_READONLY)) {
 634                 if (needsep) {
 635                         *p++ = ',';
 636                         *p++ = ' ';
 637                 }
 638                 t = msg_cat(sp, "026|readonly", &len);
 639                 memcpy(p, t, len);
 640                 p += len;
 641                 needsep = 1;
 642         }
 643         if (needsep) {
 644                 *p++ = ':';
 645                 *p++ = ' ';
 646         }
 647         if (LF_ISSET(MSTAT_SHOWLAST)) {
 648                 if (db_last(sp, &last))
 649                         return;
 650                 if (last == 0) {
 651                         t = msg_cat(sp, "028|empty file", &len);
 652                         memcpy(p, t, len);
 653                         p += len;
 654                 } else {
 655                         t = msg_cat(sp, "027|line %lu of %lu [%ld%%]", &len);
 656                         (void)sprintf(p, t, lno, last, (lno * 100) / last);
 657                         p += strlen(p);
 658                 }
 659         } else {
 660                 t = msg_cat(sp, "029|line %lu", &len);
 661                 (void)sprintf(p, t, lno);
 662                 p += strlen(p);
 663         }
 664 #ifdef DEBUG
 665         (void)sprintf(p, " (pid %lu)", (u_long)getpid());
 666         p += strlen(p);
 667 #endif
 668         *p++ = '\n';
 669         len = p - bp;
 670
 671         /*
 672          * There's a nasty problem with long path names.  Cscope and tags files
 673          * can result in long paths and vi will request a continuation key from
 674          * the user as soon as it starts the screen.  Unfortunately, the user
 675          * has already typed ahead, and chaos results.  If we assume that the
 676          * characters in the filenames and informational messages only take a
 677          * single screen column each, we can trim the filename.
 678          *
 679          * XXX
 680          * Status lines get put up at fairly awkward times.  For example, when
 681          * you do a filter read (e.g., :read ! echo foo) in the top screen of a
 682          * split screen, we have to repaint the status lines for all the screens
 683          * below the top screen.  We don't want users having to enter continue
 684          * characters for those screens.  Make it really hard to screw this up.
 685          */
 686         s = bp;
 687         if (LF_ISSET(MSTAT_TRUNCATE) && len > sp->cols) {
 688                 for (; s < np && (*s != '/' || (size_t)(p - s) > sp->cols - 3); ++s);
 689                 if (s == np) {
 690                         s = p - (sp->cols - 5);
 691                         *--s = ' ';
 692                 }
 693                 *--s = '.';
 694                 *--s = '.';
 695                 *--s = '.';
 696                 len = p - s;
 697         }
 698
 699         /* Flush any waiting ex messages. */
 700         (void)ex_fflush(sp);
 701
 702         sp->wp->scr_msg(sp, M_INFO, s, len);
 703
 704         FREE_SPACE(sp, bp, blen);
 705 alloc_err:
 706         return;
 707 }
 708
 709 /*
 710  * msg_open --
 711  *      Open the message catalogs.
 712  *
 713  * PUBLIC: int msg_open __P((SCR *, const char *));
 714  */
 715 int
 716 msg_open(SCR *sp, const char *file)
 717 {
 718         /*
 719          * !!!
 720          * Assume that the first file opened is the system default, and that
 721          * all subsequent ones user defined.  Only display error messages
 722          * if we can't open the user defined ones -- it's useful to know if
 723          * the system one wasn't there, but if nvi is being shipped with an
 724          * installed system, the file will be there, if it's not, then the
 725          * message will be repeated every time nvi is started up.
 726          */
 727         static int first = 1;
 728         DB *db;
 729         DBT data, key;
 730         db_recno_t msgno;
 731         char buf[MAXPATHLEN];
 732         const char *p, *t;
 733
 734         if ((p = strrchr(file, '/')) != NULL && p[1] == '\0' &&
 735             (((t = getenv("LC_MESSAGES")) != NULL && t[0] != '\0') ||
 736             ((t = getenv("LANG")) != NULL && t[0] != '\0'))) {
 737                 (void)snprintf(buf, sizeof(buf), "%s%s", file, t);
 738                 p = buf;
 739         } else
 740                 p = file;
 741         if ((sp->db_error = db_create(&db, 0, 0)) != 0 ||
 742             (sp->db_error = db->set_re_source(db, p)) != 0 ||
 743             (sp->db_error = db_open(db, NULL, DB_RECNO, 0, 0)) != 0) {
 744                 if (first) {
 745                         first = 0;
 746                         return (1);
 747                 }
 748                 msgq_str(sp, M_DBERR, p, "%s");
 749                 return (1);
 750         }
 751
 752         /*
 753          * Test record 1 for the magic string.  The msgq call is here so
 754          * the message catalog build finds it.
 755          */
 756 #define VMC     "VI_MESSAGE_CATALOG"
 757         memset(&key, 0, sizeof(key));
 758         key.data = &msgno;
 759         key.size = sizeof(db_recno_t);
 760         memset(&data, 0, sizeof(data));
 761         msgno = 1;
 762         if ((sp->db_error = db->get(db, NULL, &key, &data, 0)) != 0 ||
 763             data.size != sizeof(VMC) - 1 ||
 764             memcmp(data.data, VMC, sizeof(VMC) - 1)) {
 765                 (void)db->close(db, DB_NOSYNC);
 766                 if (first) {
 767                         first = 0;
 768                         return (1);
 769                 }
 770                 msgq_str(sp, M_DBERR, p,
 771                     "030|The file %s is not a message catalog");
 772                 return (1);
 773         }
 774         first = 0;
 775
 776         if (sp->gp->msg != NULL)
 777                 (void)sp->gp->msg->close(sp->gp->msg, DB_NOSYNC);
 778         sp->gp->msg = db;
 779         return (0);
 780 }
 781
 782 /*
 783  * msg_close --
 784  *      Close the message catalogs.
 785  *
 786  * PUBLIC: void msg_close __P((GS *));
 787  */
 788 void
 789 msg_close(GS *gp)
 790 {
 791         if (gp->msg != NULL) {
 792                 (void)gp->msg->close(gp->msg, 0);
 793                 gp->msg = NULL;
 794         }
 795 }
 796
 797 /*
 798  * msg_cont --
 799  *      Return common continuation messages.
 800  *
 801  * PUBLIC: const char *msg_cmsg __P((SCR *, cmsg_t, size_t *));
 802  */
 803 const char *
 804 msg_cmsg(SCR *sp, cmsg_t which, size_t *lenp)
 805 {
 806         switch (which) {
 807         case CMSG_CONF:
 808                 return (msg_cat(sp, "268|confirm? [ynq]", lenp));
 809         case CMSG_CONT:
 810                 return (msg_cat(sp, "269|Press any key to continue: ", lenp));
 811         case CMSG_CONT_EX:
 812                 return (msg_cat(sp,
 813             "270|Press any key to continue [: to enter more ex commands]: ",
 814                     lenp));
 815         case CMSG_CONT_R:
 816                 return (msg_cat(sp, "161|Press Enter to continue: ", lenp));
 817         case CMSG_CONT_S:
 818                 return (msg_cat(sp, "275| cont?", lenp));
 819         case CMSG_CONT_Q:
 820                 return (msg_cat(sp,
 821                     "271|Press any key to continue [q to quit]: ", lenp));
 822         default:
 823                 abort();
 824         }
 825         /* NOTREACHED */
 826 }
 827
 828 /*
 829  * msg_cat --
 830  *      Return a single message from the catalog, plus its length.
 831  *
 832  * !!!
 833  * Only a single catalog message can be accessed at a time, if multiple
 834  * ones are needed, they must be copied into local memory.
 835  *
 836  * PUBLIC: const char *msg_cat __P((SCR *, const char *, size_t *));
 837  */
 838 const char *
 839 msg_cat(SCR *sp, const char *str, size_t *lenp)
 840 {
 841         GS *gp;
 842         DBT data, key;
 843         db_recno_t msgno;
 844
 845         /*
 846          * If it's not a catalog message, i.e. has doesn't have a leading
 847          * number and '|' symbol, we're done.
 848          */
 849         if (isdigit((unsigned char)str[0]) &&
 850             isdigit((unsigned char)str[1]) && isdigit((unsigned char)str[2]) &&
 851             str[3] == '|') {
 852                 memset(&key, 0, sizeof(key));
 853                 key.data = &msgno;
 854                 key.size = sizeof(db_recno_t);
 855                 memset(&data, 0, sizeof(data));
 856                 msgno = atoi(str);
 857
 858                 /*
 859                  * XXX
 860                  * Really sleazy hack -- we put an extra character on the
 861                  * end of the format string, and then we change it to be
 862                  * the nul termination of the string.  There ought to be
 863                  * a better way.  Once we can allocate multiple temporary
 864                  * memory buffers, maybe we can use one of them instead.
 865                  */
 866                 gp = sp == NULL ? NULL : sp->gp;
 867                 if (gp != NULL && gp->msg != NULL &&
 868                     gp->msg->get(gp->msg, NULL, &key, &data, 0) == 0 &&
 869                     data.size != 0) {
 870                         if (lenp != NULL)
 871                                 *lenp = data.size - 1;
 872                         ((char *)data.data)[data.size - 1] = '\0';
 873                         return (data.data);
 874                 }
 875                 str = &str[4];
 876         }
 877         if (lenp != NULL)
 878                 *lenp = strlen(str);
 879         return (str);
 880 }
 881
 882 /*
 883  * msg_print --
 884  *      Return a printable version of a string, in allocated memory.
 885  *
 886  * PUBLIC: char *msg_print __P((SCR *, const char *, int *));
 887  */
 888 char *
 889 msg_print(SCR *sp, const char *s, int *needfree)
 890 {
 891         size_t blen, nlen;
 892         const char *cp;
 893         char *bp, *ep, *p;
 894         unsigned char *t;
 895
 896         *needfree = 0;
 897
 898         for (cp = s; *cp != '\0'; ++cp)
 899                 if (!isprint((unsigned char)*cp))
 900                         break;
 901         if (*cp == '\0')
 902                 return ((char *)__UNCONST(s));  /* SAFE: needfree set to 0. */
 903
 904         nlen = 0;
 905         if (0) {
 906 retry:          if (sp == NULL)
 907                         free(bp);
 908                 else
 909                         FREE_SPACE(sp, bp, blen);
 910                 *needfree = 0;
 911         }
 912         nlen += 256;
 913         if (sp == NULL) {
 914                 if ((bp = malloc(nlen)) == NULL)
 915                         goto alloc_err;
 916         } else
 917                 GET_SPACE_GOTOC(sp, bp, blen, nlen);
 918         if (0) {
 919 alloc_err:      return __UNCONST("");
 920         }
 921         *needfree = 1;
 922
 923         for (p = bp, ep = (bp + blen) - 1, cp = s; *cp != '\0' && p < ep; ++cp)
 924                 for (t = KEY_NAME(sp, *cp); *t != '\0' && p < ep; *p++ = *t++);
 925         if (p == ep)
 926                 goto retry;
 927         *p = '\0';
 928         return (bp);
 929 }