common/api.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  * Copyright (c) 1995
   7  *      George V. Neville-Neil. 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: api.c,v 8.35 2001/04/25 21:27:32 skimo Exp $ (Berkeley) $Date: 2001/04/25 21:27:32 $";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20 #include <sys/time.h>
  21
  22 #include <bitstring.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <termios.h>
  28 #include <unistd.h>
  29
  30 #include "../common/common.h"
  31 #include "../ex/tag.h"
  32
  33 extern GS *__global_list;                       /* XXX */
  34
  35 /*
  36  * api_fscreen --
  37  *      Return a pointer to the screen specified by the screen id
  38  *      or a file name.
  39  *
  40  * PUBLIC: SCR *api_fscreen __P((int, char *));
  41  */
  42 SCR *
  43 api_fscreen(id, name)
  44         int id;
  45         char *name;
  46 {
  47         GS *gp;
  48         SCR *tsp;
  49         WIN *wp;
  50
  51         gp = __global_list;
  52
  53         /* Search the displayed lists. */
  54         for (wp = gp->dq.cqh_first;
  55             wp != (void *)&gp->dq; wp = wp->q.cqe_next)
  56                 for (tsp = wp->scrq.cqh_first;
  57                     tsp != (void *)&wp->scrq; tsp = tsp->q.cqe_next)
  58                 if (name == NULL) {
  59                         if (id == tsp->id)
  60                                 return (tsp);
  61                 } else if (!strcmp(name, tsp->frp->name))
  62                         return (tsp);
  63
  64         /* Search the hidden list. */
  65         for (tsp = gp->hq.cqh_first;
  66             tsp != (void *)&gp->hq; tsp = tsp->q.cqe_next)
  67                 if (name == NULL) {
  68                         if (id == tsp->id)
  69                                 return (tsp);
  70                 } else if (!strcmp(name, tsp->frp->name))
  71                         return (tsp);
  72         return (NULL);
  73 }
  74
  75 /*
  76  * api_aline --
  77  *      Append a line.
  78  *
  79  * PUBLIC: int api_aline __P((SCR *, db_recno_t, char *, size_t));
  80  */
  81 int
  82 api_aline(sp, lno, line, len)
  83         SCR *sp;
  84         db_recno_t lno;
  85         char *line;
  86         size_t len;
  87 {
  88         size_t wblen;
  89         CHAR_T *wbp;
  90
  91         CHAR2INT(sp, line, len, wbp, wblen);
  92
  93         return (db_append(sp, 1, lno, wbp, wblen));
  94 }
  95
  96 /*
  97  * api_extend --
  98  *      Extend file.
  99  *
 100  * PUBLIC: int api_extend __P((SCR *, db_recno_t));
 101  */
 102 int
 103 api_extend(sp, lno)
 104         SCR *sp;
 105         db_recno_t lno;
 106 {
 107         db_recno_t lastlno;
 108         if (db_last(sp, &lastlno))
 109             return 1;
 110         while(lastlno < lno)
 111             if (db_append(sp, 1, lastlno++, NULL, 0))
 112                 return 1;
 113         return 0;
 114 }
 115
 116 /*
 117  * api_dline --
 118  *      Delete a line.
 119  *
 120  * PUBLIC: int api_dline __P((SCR *, db_recno_t));
 121  */
 122 int
 123 api_dline(sp, lno)
 124         SCR *sp;
 125         db_recno_t lno;
 126 {
 127         if (db_delete(sp, lno))
 128                 return 1;
 129         /* change current line if deleted line is that one
 130          * or one berfore that
 131          */
 132         if (sp->lno >= lno && sp->lno > 1)
 133                 sp->lno--;
 134         return 0;
 135 }
 136
 137 /*
 138  * api_gline --
 139  *      Get a line.
 140  *
 141  * PUBLIC: int api_gline __P((SCR *, db_recno_t, CHAR_T **, size_t *));
 142  */
 143 int
 144 api_gline(sp, lno, linepp, lenp)
 145         SCR *sp;
 146         db_recno_t lno;
 147         CHAR_T **linepp;
 148         size_t *lenp;
 149 {
 150         int isempty;
 151
 152         if (db_eget(sp, lno, linepp, lenp, &isempty)) {
 153                 if (isempty)
 154                         msgq(sp, M_ERR, "209|The file is empty");
 155                 return (1);
 156         }
 157         return (0);
 158 }
 159
 160 /*
 161  * api_iline --
 162  *      Insert a line.
 163  *
 164  * PUBLIC: int api_iline __P((SCR *, db_recno_t, CHAR_T *, size_t));
 165  */
 166 int
 167 api_iline(sp, lno, line, len)
 168         SCR *sp;
 169         db_recno_t lno;
 170         CHAR_T *line;
 171         size_t len;
 172 {
 173         return (db_insert(sp, lno, line, len));
 174 }
 175
 176 /*
 177  * api_lline --
 178  *      Return the line number of the last line in the file.
 179  *
 180  * PUBLIC: int api_lline __P((SCR *, db_recno_t *));
 181  */
 182 int
 183 api_lline(sp, lnop)
 184         SCR *sp;
 185         db_recno_t *lnop;
 186 {
 187         return (db_last(sp, lnop));
 188 }
 189
 190 /*
 191  * api_sline --
 192  *      Set a line.
 193  *
 194  * PUBLIC: int api_sline __P((SCR *, db_recno_t, CHAR_T *, size_t));
 195  */
 196 int
 197 api_sline(sp, lno, line, len)
 198         SCR *sp;
 199         db_recno_t lno;
 200         CHAR_T *line;
 201         size_t len;
 202 {
 203         return (db_set(sp, lno, line, len));
 204 }
 205
 206 /*
 207  * api_getmark --
 208  *      Get the mark.
 209  *
 210  * PUBLIC: int api_getmark __P((SCR *, int, MARK *));
 211  */
 212 int
 213 api_getmark(sp, markname, mp)
 214         SCR *sp;
 215         int markname;
 216         MARK *mp;
 217 {
 218         return (mark_get(sp, (ARG_CHAR_T)markname, mp, M_ERR));
 219 }
 220
 221 /*
 222  * api_setmark --
 223  *      Set the mark.
 224  *
 225  * PUBLIC: int api_setmark __P((SCR *, int, MARK *));
 226  */
 227 int
 228 api_setmark(sp, markname, mp)
 229         SCR *sp;
 230         int markname;
 231         MARK *mp;
 232 {
 233         return (mark_set(sp, (ARG_CHAR_T)markname, mp, 1));
 234 }
 235
 236 /*
 237  * api_nextmark --
 238  *      Return the first mark if next not set, otherwise return the
 239  *      subsequent mark.
 240  *
 241  * PUBLIC: int api_nextmark __P((SCR *, int, char *));
 242  */
 243 int
 244 api_nextmark(sp, next, namep)
 245         SCR *sp;
 246         int next;
 247         char *namep;
 248 {
 249         LMARK *mp;
 250
 251         mp = sp->ep->marks.lh_first;
 252         if (next)
 253                 for (; mp != NULL; mp = mp->q.le_next)
 254                         if (mp->name == *namep) {
 255                                 mp = mp->q.le_next;
 256                                 break;
 257                         }
 258         if (mp == NULL)
 259                 return (1);
 260         *namep = mp->name;
 261         return (0);
 262 }
 263
 264 /*
 265  * api_getcursor --
 266  *      Get the cursor.
 267  *
 268  * PUBLIC: int api_getcursor __P((SCR *, MARK *));
 269  */
 270 int
 271 api_getcursor(sp, mp)
 272         SCR *sp;
 273         MARK *mp;
 274 {
 275         mp->lno = sp->lno;
 276         mp->cno = sp->cno;
 277         return (0);
 278 }
 279
 280 /*
 281  * api_setcursor --
 282  *      Set the cursor.
 283  *
 284  * PUBLIC: int api_setcursor __P((SCR *, MARK *));
 285  */
 286 int
 287 api_setcursor(sp, mp)
 288         SCR *sp;
 289         MARK *mp;
 290 {
 291         size_t len;
 292
 293         if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
 294                 return (1);
 295         if (mp->cno < 0 || mp->cno > len) {
 296                 msgq(sp, M_ERR, "Cursor set to nonexistent column");
 297                 return (1);
 298         }
 299
 300         /* Set the cursor. */
 301         sp->lno = mp->lno;
 302         sp->cno = mp->cno;
 303         return (0);
 304 }
 305
 306 /*
 307  * api_emessage --
 308  *      Print an error message.
 309  *
 310  * PUBLIC: void api_emessage __P((SCR *, char *));
 311  */
 312 void
 313 api_emessage(sp, text)
 314         SCR *sp;
 315         char *text;
 316 {
 317         msgq(sp, M_ERR, "%s", text);
 318 }
 319
 320 /*
 321  * api_imessage --
 322  *      Print an informational message.
 323  *
 324  * PUBLIC: void api_imessage __P((SCR *, char *));
 325  */
 326 void
 327 api_imessage(sp, text)
 328         SCR *sp;
 329         char *text;
 330 {
 331         msgq(sp, M_INFO, "%s", text);
 332 }
 333
 334 /*
 335  * api_edit
 336  *      Create a new screen and return its id
 337  *      or edit a new file in the current screen.
 338  *
 339  * PUBLIC: int api_edit __P((SCR *, char *, SCR **, int));
 340  */
 341 int
 342 api_edit(sp, file, spp, newscreen)
 343         SCR *sp;
 344         char *file;
 345         SCR **spp;
 346         int newscreen;
 347 {
 348         EXCMD cmd;
 349         size_t wlen;
 350         CHAR_T *wp;
 351
 352         if (file) {
 353                 ex_cinit(sp, &cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0);
 354                 CHAR2INT(sp, file, strlen(file) + 1, wp, wlen);
 355                 argv_exp0(sp, &cmd, wp, wlen - 1 /* terminating 0 */);
 356         } else
 357                 ex_cinit(sp, &cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0);
 358         if (newscreen)
 359                 cmd.flags |= E_NEWSCREEN;               /* XXX */
 360         if (cmd.cmd->fn(sp, &cmd))
 361                 return (1);
 362         *spp = sp->nextdisp;
 363         return (0);
 364 }
 365
 366 /*
 367  * api_escreen
 368  *      End a screen.
 369  *
 370  * PUBLIC: int api_escreen __P((SCR *));
 371  */
 372 int
 373 api_escreen(sp)
 374         SCR *sp;
 375 {
 376         EXCMD cmd;
 377
 378         /*
 379          * XXX
 380          * If the interpreter exits anything other than the current
 381          * screen, vi isn't going to update everything correctly.
 382          */
 383         ex_cinit(sp, &cmd, C_QUIT, 0, OOBLNO, OOBLNO, 0);
 384         return (cmd.cmd->fn(sp, &cmd));
 385 }
 386
 387 /*
 388  * api_swscreen --
 389  *    Switch to a new screen.
 390  *
 391  * PUBLIC: int api_swscreen __P((SCR *, SCR *));
 392  */
 393 int
 394 api_swscreen(sp, new)
 395       SCR *sp, *new;
 396 {
 397         /*
 398          * XXX
 399          * If the interpreter switches from anything other than the
 400          * current screen, vi isn't going to update everything correctly.
 401          */
 402         sp->nextdisp = new;
 403         F_SET(sp, SC_SSWITCH);
 404
 405         return (0);
 406 }
 407
 408 /*
 409  * api_map --
 410  *      Map a key.
 411  *
 412  * PUBLIC: int api_map __P((SCR *, char *, char *, size_t));
 413  */
 414 int
 415 api_map(sp, name, map, len)
 416         SCR *sp;
 417         char *name, *map;
 418         size_t len;
 419 {
 420         EXCMD cmd;
 421         size_t wlen;
 422         CHAR_T *wp;
 423
 424         ex_cinit(sp, &cmd, C_MAP, 0, OOBLNO, OOBLNO, 0);
 425         CHAR2INT(sp, name, strlen(name) + 1, wp, wlen);
 426         argv_exp0(sp, &cmd, wp, wlen - 1);
 427         CHAR2INT(sp, map, len, wp, wlen);
 428         argv_exp0(sp, &cmd, wp, wlen);
 429         return (cmd.cmd->fn(sp, &cmd));
 430 }
 431
 432 /*
 433  * api_unmap --
 434  *      Unmap a key.
 435  *
 436  * PUBLIC: int api_unmap __P((SCR *, char *));
 437  */
 438 int
 439 api_unmap(sp, name)
 440         SCR *sp;
 441         char *name;
 442 {
 443         EXCMD cmd;
 444         size_t wlen;
 445         CHAR_T *wp;
 446
 447         ex_cinit(sp, &cmd, C_UNMAP, 0, OOBLNO, OOBLNO, 0);
 448         CHAR2INT(sp, name, strlen(name) + 1, wp, wlen);
 449         argv_exp0(sp, &cmd, wp, wlen - 1);
 450         return (cmd.cmd->fn(sp, &cmd));
 451 }
 452
 453 /*
 454  * api_opts_get --
 455  *      Return a option value as a string, in allocated memory.
 456  *      If the option is of type boolean, boolvalue is (un)set
 457  *      according to the value; otherwise boolvalue is -1.
 458  *
 459  * PUBLIC: int api_opts_get __P((SCR *, char *, char **, int *));
 460  */
 461 int
 462 api_opts_get(sp, name, value, boolvalue)
 463         SCR *sp;
 464         char *name, **value;
 465         int *boolvalue;
 466 {
 467         OPTLIST const *op;
 468         int offset;
 469
 470         if ((op = opts_search(name)) == NULL) {
 471                 opts_nomatch(sp, name);
 472                 return (1);
 473         }
 474
 475         offset = op - optlist;
 476         if (boolvalue != NULL)
 477                 *boolvalue = -1;
 478         switch (op->type) {
 479         case OPT_0BOOL:
 480         case OPT_1BOOL:
 481                 MALLOC_RET(sp, *value, char *, strlen(op->name) + 2 + 1);
 482                 (void)sprintf(*value,
 483                     "%s%s", O_ISSET(sp, offset) ? "" : "no", op->name);
 484                 if (boolvalue != NULL)
 485                         *boolvalue = O_ISSET(sp, offset);
 486                 break;
 487         case OPT_NUM:
 488                 MALLOC_RET(sp, *value, char *, 20);
 489                 (void)sprintf(*value, "%lu", (u_long)O_VAL(sp, offset));
 490                 break;
 491         case OPT_STR:
 492                 if (O_STR(sp, offset) == NULL) {
 493                         MALLOC_RET(sp, *value, char *, 2);
 494                         value[0] = '\0';
 495                 } else {
 496                         MALLOC_RET(sp,
 497                             *value, char *, strlen(O_STR(sp, offset)) + 1);
 498                         (void)sprintf(*value, "%s", O_STR(sp, offset));
 499                 }
 500                 break;
 501         }
 502         return (0);
 503 }
 504
 505 /*
 506  * api_opts_set --
 507  *      Set options.
 508  *
 509  * PUBLIC: int api_opts_set __P((SCR *, char *, char *, u_long, int));
 510  */
 511 int
 512 api_opts_set(sp, name, str_value, num_value, bool_value)
 513         SCR *sp;
 514         char *name, *str_value;
 515         u_long num_value;
 516         int bool_value;
 517 {
 518         ARGS *ap[2], a, b;
 519         OPTLIST const *op;
 520         int rval;
 521         size_t blen;
 522         char *bp;
 523         size_t wblen;
 524         CHAR_T *wbp;
 525
 526         if ((op = opts_search(name)) == NULL) {
 527                 opts_nomatch(sp, name);
 528                 return (1);
 529         }
 530
 531         switch (op->type) {
 532         case OPT_0BOOL:
 533         case OPT_1BOOL:
 534                 GET_SPACE_RET(sp, bp, blen, 64);
 535                 a.len = snprintf(bp, 64, "%s%s", bool_value ? "" : "no", name);
 536                 break;
 537         case OPT_NUM:
 538                 GET_SPACE_RET(sp, bp, blen, 64);
 539                 a.len = snprintf(bp, 64, "%s=%lu", name, num_value);
 540                 break;
 541         case OPT_STR:
 542                 GET_SPACE_RET(sp, bp, blen, 1024);
 543                 a.len = snprintf(bp, 1024, "%s=%s", name, str_value);
 544                 break;
 545         }
 546
 547         CHAR2INT(sp, bp, a.len, wbp, wblen);
 548         a.len = wblen;
 549         wbp = v_wstrdup(sp, wbp, wblen);
 550
 551         a.bp = wbp;
 552         b.len = 0;
 553         b.bp = NULL;
 554         ap[0] = &a;
 555         ap[1] = &b;
 556         rval = opts_set(sp, ap, NULL);
 557
 558         free(wbp);
 559         FREE_SPACE(sp, bp, blen);
 560
 561         return (rval);
 562 }
 563
 564 /*
 565  * api_run_str --
 566  *      Execute a string as an ex command.
 567  *
 568  * PUBLIC: int api_run_str __P((SCR *, char *));
 569  */
 570 int
 571 api_run_str(sp, cmd)
 572         SCR *sp;
 573         char *cmd;
 574 {
 575         size_t wlen;
 576         CHAR_T *wp;
 577
 578         CHAR2INT(sp, cmd, strlen(cmd)+1, wp, wlen);
 579         return (ex_run_str(sp, NULL, wp, wlen - 1, 0, 0));
 580 }
 581
 582 /*
 583  * PUBLIC: TAGQ * api_tagq_new __P((SCR*, char*));
 584  */
 585 TAGQ *
 586 api_tagq_new(sp, tag)
 587         SCR *sp;
 588         char *tag;
 589 {
 590         TAGQ *tqp;
 591         size_t len;
 592
 593         /* Allocate and initialize the tag queue structure. */
 594         len = strlen(tag);
 595         CALLOC_GOTO(sp, tqp, TAGQ *, 1, sizeof(TAGQ) + len + 1);
 596         CIRCLEQ_INIT(&tqp->tagq);
 597         tqp->tag = tqp->buf;
 598         memcpy(tqp->tag, tag, (tqp->tlen = len) + 1);
 599
 600         return tqp;
 601
 602 alloc_err:
 603         return (NULL);
 604 }
 605
 606 /*
 607  * PUBLIC: void api_tagq_add __P((SCR*, TAGQ*, char*, char *, char *));
 608  */
 609 void
 610 api_tagq_add(sp, tqp, filename, search, msg)
 611         SCR *sp;
 612         TAGQ *tqp;
 613         char *filename, *search, *msg;
 614 {
 615         TAG *tp;
 616         CHAR_T *wp;
 617         size_t wlen;
 618         size_t flen = strlen(filename);
 619         size_t slen = strlen(search);
 620         size_t mlen = strlen(msg);
 621
 622         CALLOC_GOTO(sp, tp, TAG *, 1,
 623                     sizeof(TAG) - 1 + flen + 1 +
 624                     (slen + 1 + mlen + 1) * sizeof(CHAR_T));
 625         tp->fname = (char *)tp->buf;
 626         memcpy(tp->fname, filename, flen + 1);
 627         tp->fnlen = flen;
 628         tp->search = (CHAR_T *)((char *)tp->fname + flen + 1);
 629         CHAR2INT(sp, search, slen + 1, wp, wlen);
 630         MEMCPYW(tp->search, wp, wlen);
 631         tp->slen = slen;
 632         tp->msg = tp->search + slen + 1;
 633         CHAR2INT(sp, msg, mlen + 1, wp, wlen);
 634         MEMCPYW(tp->msg, wp, wlen);
 635         tp->mlen = mlen;
 636         CIRCLEQ_INSERT_TAIL(&tqp->tagq, tp, q);
 637
 638 alloc_err:
 639         return;
 640 }
 641
 642 /*
 643  * PUBLIC: int api_tagq_push __P((SCR*, TAGQ**));
 644  */
 645 int
 646 api_tagq_push(sp, tqpp)
 647         SCR *sp;
 648         TAGQ **tqpp;
 649 {
 650         FREF *frp;
 651         db_recno_t lno;
 652         size_t cno;
 653         int istmp;
 654         TAGQ *tqp;
 655
 656         tqp = *tqpp;
 657
 658         *tqpp = 0;
 659
 660         /* Check to see if we found anything. */
 661         if (tqp->tagq.cqh_first == (void *)&tqp->tagq) {
 662                 free(tqp);
 663                 return 0;
 664         }
 665
 666         tqp->current = tqp->tagq.cqh_first;
 667
 668         if (tagq_push(sp, tqp, 0, 0))
 669                 return 1;
 670
 671         return (0);
 672 }
 673
 674 /*
 675  * PUBLIC: void api_tagq_free __P((SCR*, TAGQ*));
 676  */
 677 void
 678 api_tagq_free(sp, tqp)
 679         SCR *sp;
 680         TAGQ *tqp;
 681 {
 682         if (tqp)
 683                 tagq_free(sp, tqp);
 684 }