usr.bin/vgrind/vfontedpr.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)vfontedpr.c      8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/vgrind/vfontedpr.c,v 1.12 1999/08/28 01:07:21 peter Exp $
  36  * $DragonFly: src/usr.bin/vgrind/vfontedpr.c,v 1.4 2008/10/16 01:52:34 swildner Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <ctype.h>
  42 #include <err.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <time.h>
  47 #include "pathnames.h"
  48 #include "extern.h"
  49
  50 #define FALSE 0
  51 #define TRUE !(FALSE)
  52 #define NIL 0
  53 #define STANDARD 0
  54 #define ALTERNATE 1
  55
  56 /*
  57  * Vfontedpr.
  58  *
  59  * Dave Presotto 1/12/81 (adapted from an earlier version by Bill Joy)
  60  *
  61  */
  62
  63 #define STRLEN 10               /* length of strings introducing things */
  64 #define PNAMELEN 40             /* length of a function/procedure name */
  65 #define PSMAX 20                /* size of procedure name stacking */
  66
  67 static int       iskw(char *);
  68 static boolean   isproc(char *);
  69 static void      putKcp(char *, char *, boolean);
  70 static void      putScp(char *);
  71 static void      putcp(int);
  72 static int       tabs(char *, char *);
  73 static int       width(char *, char *);
  74
  75 /*
  76  *      The state variables
  77  */
  78
  79 static boolean  filter = FALSE; /* act as a filter (like eqn) */
  80 static boolean  inchr;          /* in a string constant */
  81 static boolean  incomm;         /* in a comment of the primary type */
  82 static boolean  idx = FALSE;    /* form an index */
  83 static boolean  instr;          /* in a string constant */
  84 static boolean  nokeyw = FALSE; /* no keywords being flagged */
  85 static boolean  pass = FALSE;   /*
  86                                  * when acting as a filter, pass indicates
  87                                  * whether we are currently processing
  88                                  * input.
  89                                  */
  90
  91 static int      blklevel;       /* current nesting level */
  92 static int      comtype;        /* type of comment */
  93 static char    *defsfile[2] = { _PATH_VGRINDEFS, 0 };
  94                                 /* name of language definitions file */
  95 static int      margin;
  96 static int      plstack[PSMAX]; /* the procedure nesting level stack */
  97 static char     pname[BUFSIZ+1];
  98 static boolean  prccont;        /* continue last procedure */
  99 static int      psptr;          /* the stack index of the current procedure */
 100 static char     pstack[PSMAX][PNAMELEN+1];      /* the procedure name stack */
 101
 102 /*
 103  *      The language specific globals
 104  */
 105
 106 char    *l_acmbeg;              /* string introducing a comment */
 107 char    *l_acmend;              /* string ending a comment */
 108 char    *l_blkbeg;              /* string begining of a block */
 109 char    *l_blkend;              /* string ending a block */
 110 char    *l_chrbeg;              /* delimiter for character constant */
 111 char    *l_chrend;              /* delimiter for character constant */
 112 char    *l_combeg;              /* string introducing a comment */
 113 char    *l_comend;              /* string ending a comment */
 114 char     l_escape;              /* character used to  escape characters */
 115 char    *l_keywds[BUFSIZ/2];    /* keyword table address */
 116 char    *l_nocom;               /* regexp for non-comments */
 117 char    *l_prcbeg;              /* regular expr for procedure begin */
 118 char    *l_strbeg;              /* delimiter for string constant */
 119 char    *l_strend;              /* delimiter for string constant */
 120 boolean  l_toplex;              /* procedures only defined at top lex level */
 121 char    *language = "c";        /* the language indicator */
 122
 123 #define ps(x)   printf("%s", x)
 124
 125 int
 126 main(int argc, char **argv)
 127 {
 128     char *fname = "";
 129     struct stat stbuf;
 130     char buf[BUFSIZ];
 131     char *defs;
 132     int needbp = 0;
 133
 134     argc--, argv++;
 135     do {
 136         char *cp;
 137         int i;
 138
 139         if (argc > 0) {
 140             if (!strcmp(argv[0], "-h")) {
 141                 if (argc == 1) {
 142                     printf("'ds =H\n");
 143                     argc = 0;
 144                     goto rest;
 145                 }
 146                 printf("'ds =H %s\n", argv[1]);
 147                 argc--, argv++;
 148                 argc--, argv++;
 149                 if (argc > 0)
 150                     continue;
 151                 goto rest;
 152             }
 153
 154             /* act as a filter like eqn */
 155             if (!strcmp(argv[0], "-f")) {
 156                 filter++;
 157                 argv[0] = argv[argc-1];
 158                 argv[argc-1] = "-";
 159                 continue;
 160             }
 161
 162             /* take input from the standard place */
 163             if (!strcmp(argv[0], "-")) {
 164                 argc = 0;
 165                 goto rest;
 166             }
 167
 168             /* build an index */
 169             if (!strcmp(argv[0], "-x")) {
 170                 idx++;
 171                 argv[0] = "-n";
 172             }
 173
 174             /* indicate no keywords */
 175             if (!strcmp(argv[0], "-n")) {
 176                 nokeyw++;
 177                 argc--, argv++;
 178                 continue;
 179             }
 180
 181             /* specify the font size */
 182             if (!strncmp(argv[0], "-s", 2)) {
 183                 i = 0;
 184                 cp = argv[0] + 2;
 185                 while (*cp)
 186                     i = i * 10 + (*cp++ - '0');
 187                 printf("'ps %d\n'vs %d\n", i, i+1);
 188                 argc--, argv++;
 189                 continue;
 190             }
 191
 192             /* specify the language */
 193             if (!strncmp(argv[0], "-l", 2)) {
 194                 language = argv[0]+2;
 195                 argc--, argv++;
 196                 continue;
 197             }
 198
 199             /* specify the language description file */
 200             if (!strncmp(argv[0], "-d", 2)) {
 201                 defsfile[0] = argv[1];
 202                 argc--, argv++;
 203                 argc--, argv++;
 204                 continue;
 205             }
 206
 207             /* open the file for input */
 208             if (freopen(argv[0], "r", stdin) == NULL)
 209                 err(1, "%s", argv[0]);
 210             if (idx)
 211                 printf("'ta 4i 4.25i 5.5iR\n'in .5i\n");
 212             fname = argv[0];
 213             argc--, argv++;
 214         }
 215     rest:
 216
 217         /*
 218          *  get the  language definition from the defs file
 219          */
 220         i = cgetent(&defs, defsfile, language);
 221         if (i == -1) {
 222             fprintf (stderr, "no entry for language %s\n", language);
 223             exit (0);
 224         } else  if (i == -2) { fprintf(stderr,
 225             "cannot find vgrindefs file %s\n", defsfile[0]);
 226             exit (0);
 227         } else if (i == -3) { fprintf(stderr,
 228             "potential reference loop detected in vgrindefs file %s\n",
 229             defsfile[0]);
 230             exit(0);
 231         }
 232         if (cgetustr(defs, "kw", &cp) == -1)
 233             nokeyw = TRUE;
 234         else  {
 235             char **cpp;
 236
 237             cpp = l_keywds;
 238             while (*cp) {
 239                 while (*cp == ' ' || *cp =='\t')
 240                     *cp++ = '\0';
 241                 if (*cp)
 242                     *cpp++ = cp;
 243                 while (*cp != ' ' && *cp  != '\t' && *cp)
 244                     cp++;
 245             }
 246             *cpp = NIL;
 247         }
 248         cgetustr(defs, "pb", &cp);
 249         l_prcbeg = convexp(cp);
 250         cgetustr(defs, "cb", &cp);
 251         l_combeg = convexp(cp);
 252         cgetustr(defs, "ce", &cp);
 253         l_comend = convexp(cp);
 254         cgetustr(defs, "ab", &cp);
 255         l_acmbeg = convexp(cp);
 256         cgetustr(defs, "ae", &cp);
 257         l_acmend = convexp(cp);
 258         cgetustr(defs, "sb", &cp);
 259         l_strbeg = convexp(cp);
 260         cgetustr(defs, "se", &cp);
 261         l_strend = convexp(cp);
 262         cgetustr(defs, "bb", &cp);
 263         l_blkbeg = convexp(cp);
 264         cgetustr(defs, "be", &cp);
 265         l_blkend = convexp(cp);
 266         cgetustr(defs, "lb", &cp);
 267         l_chrbeg = convexp(cp);
 268         cgetustr(defs, "le", &cp);
 269         l_chrend = convexp(cp);
 270         if (cgetustr(defs, "nc", &cp) >= 0)
 271                 l_nocom = convexp(cp);
 272         l_escape = '\\';
 273         l_onecase = (cgetcap(defs, "oc", ':') != NULL);
 274         l_toplex = (cgetcap(defs, "tl", ':') != NULL);
 275
 276         /* initialize the program */
 277
 278         incomm = FALSE;
 279         instr = FALSE;
 280         inchr = FALSE;
 281         _escaped = FALSE;
 282         blklevel = 0;
 283         for (psptr=0; psptr<PSMAX; psptr++) {
 284             pstack[psptr][0] = '\0';
 285             plstack[psptr] = 0;
 286         }
 287         psptr = -1;
 288         ps("'-F\n");
 289         if (!filter) {
 290             printf(".ds =F %s\n", fname);
 291             ps("'wh 0 vH\n");
 292             ps("'wh -1i vF\n");
 293         }
 294         if (needbp) {
 295             needbp = 0;
 296             printf(".()\n");
 297             printf(".bp\n");
 298         }
 299         if (!filter) {
 300             fstat(fileno(stdin), &stbuf);
 301             cp = ctime(&stbuf.st_mtime);
 302             cp[16] = '\0';
 303             cp[24] = '\0';
 304             printf(".ds =M %s %s\n", cp+4, cp+20);
 305         }
 306
 307         /*
 308          *      MAIN LOOP!!!
 309          */
 310         while (fgets(buf, sizeof buf, stdin) != NULL) {
 311             if (buf[0] == '\f') {
 312                 printf(".bp\n");
 313             }
 314             if (buf[0] == '.') {
 315                 printf("%s", buf);
 316                 if (!strncmp (buf+1, "vS", 2))
 317                     pass = TRUE;
 318                 if (!strncmp (buf+1, "vE", 2))
 319                     pass = FALSE;
 320                 continue;
 321             }
 322             prccont = FALSE;
 323             if (!filter || pass)
 324                 putScp(buf);
 325             else
 326                 printf("%s", buf);
 327             if (prccont && (psptr >= 0)) {
 328                 ps("'FC ");
 329                 ps(pstack[psptr]);
 330                 ps("\n");
 331             }
 332 #ifdef DEBUG
 333             printf ("com %o str %o chr %o ptr %d\n", incomm, instr, inchr, psptr);
 334 #endif
 335             margin = 0;
 336         }
 337         needbp = 1;
 338     } while (argc > 0);
 339     exit(0);
 340 }
 341
 342 #define isidchr(c) (isalnum(c) || (c) == '_')
 343
 344 static void
 345 putScp(char *os)
 346 {
 347     char *s = os;                       /* pointer to unmatched string */
 348     char dummy[BUFSIZ];                 /* dummy to be used by expmatch */
 349     char *comptr;                       /* end of a comment delimiter */
 350     char *acmptr;                       /* end of a comment delimiter */
 351     char *strptr;                       /* end of a string delimiter */
 352     char *chrptr;                       /* end of a character const delimiter */
 353     char *blksptr;                      /* end of a lexical block start */
 354     char *blkeptr;                      /* end of a lexical block end */
 355     char *nocomptr;                     /* end of a non-comment delimiter */
 356
 357     s_start = os;                       /* remember the start for expmatch */
 358     _escaped = FALSE;
 359     if (nokeyw || incomm || instr)
 360         goto skip;
 361     if (isproc(s)) {
 362         ps("'FN ");
 363         ps(pname);
 364         ps("\n");
 365         if (psptr < PSMAX) {
 366             ++psptr;
 367             strncpy (pstack[psptr], pname, PNAMELEN);
 368             pstack[psptr][PNAMELEN] = '\0';
 369             plstack[psptr] = blklevel;
 370         }
 371     }
 372 skip:
 373     do {
 374         /* check for string, comment, blockstart, etc */
 375         if (!incomm && !instr && !inchr) {
 376
 377             blkeptr = expmatch (s, l_blkend, dummy);
 378             blksptr = expmatch (s, l_blkbeg, dummy);
 379             comptr = expmatch (s, l_combeg, dummy);
 380             acmptr = expmatch (s, l_acmbeg, dummy);
 381             strptr = expmatch (s, l_strbeg, dummy);
 382             chrptr = expmatch (s, l_chrbeg, dummy);
 383             nocomptr = expmatch (s, l_nocom, dummy);
 384
 385             /* start of non-comment? */
 386             if (nocomptr != NIL)
 387                 if ((nocomptr <= comptr || comptr == NIL)
 388                   && (nocomptr <= acmptr || acmptr == NIL)) {
 389                     /* continue after non-comment */
 390                     putKcp (s, nocomptr-1, FALSE);
 391                     s = nocomptr;
 392                     continue;
 393                 }
 394
 395             /* start of a comment? */
 396             if (comptr != NIL)
 397                 if ((comptr < strptr || strptr == NIL)
 398                   && (comptr < acmptr || acmptr == NIL)
 399                   && (comptr < chrptr || chrptr == NIL)
 400                   && (comptr < blksptr || blksptr == NIL)
 401                   && (comptr < blkeptr || blkeptr == NIL)) {
 402                     putKcp (s, comptr-1, FALSE);
 403                     s = comptr;
 404                     incomm = TRUE;
 405                     comtype = STANDARD;
 406                     if (s != os)
 407                         ps ("\\c");
 408                     ps ("\\c\n'+C\n");
 409                     continue;
 410                 }
 411
 412             /* start of a comment? */
 413             if (acmptr != NIL)
 414                 if ((acmptr < strptr || strptr == NIL)
 415                   && (acmptr < chrptr || chrptr == NIL)
 416                   && (acmptr < blksptr || blksptr == NIL)
 417                   && (acmptr < blkeptr || blkeptr == NIL)) {
 418                     putKcp (s, acmptr-1, FALSE);
 419                     s = acmptr;
 420                     incomm = TRUE;
 421                     comtype = ALTERNATE;
 422                     if (s != os)
 423                         ps ("\\c");
 424                     ps ("\\c\n'+C\n");
 425                     continue;
 426                 }
 427
 428             /* start of a string? */
 429             if (strptr != NIL)
 430                 if ((strptr < chrptr || chrptr == NIL)
 431                   && (strptr < blksptr || blksptr == NIL)
 432                   && (strptr < blkeptr || blkeptr == NIL)) {
 433                     putKcp (s, strptr-1, FALSE);
 434                     s = strptr;
 435                     instr = TRUE;
 436                     continue;
 437                 }
 438
 439             /* start of a character string? */
 440             if (chrptr != NIL)
 441                 if ((chrptr < blksptr || blksptr == NIL)
 442                   && (chrptr < blkeptr || blkeptr == NIL)) {
 443                     putKcp (s, chrptr-1, FALSE);
 444                     s = chrptr;
 445                     inchr = TRUE;
 446                     continue;
 447                 }
 448
 449             /* end of a lexical block */
 450             if (blkeptr != NIL) {
 451                 if (blkeptr < blksptr || blksptr == NIL) {
 452                     putKcp (s, blkeptr - 1, FALSE);
 453                     s = blkeptr;
 454                     if (blklevel > 0 /* sanity */)
 455                             blklevel--;
 456                     if (psptr >= 0 && plstack[psptr] >= blklevel) {
 457
 458                         /* end of current procedure */
 459                         if (s != os)
 460                             ps ("\\c");
 461                         ps ("\\c\n'-F\n");
 462                         blklevel = plstack[psptr];
 463
 464                         /* see if we should print the last proc name */
 465                         if (--psptr >= 0)
 466                             prccont = TRUE;
 467                         else
 468                             psptr = -1;
 469                     }
 470                     continue;
 471                 }
 472             }
 473
 474             /* start of a lexical block */
 475             if (blksptr != NIL) {
 476                 putKcp (s, blksptr - 1, FALSE);
 477                 s = blksptr;
 478                 blklevel++;
 479                 continue;
 480             }
 481
 482         /* check for end of comment */
 483         } else if (incomm) {
 484             comptr = expmatch (s, l_comend, dummy);
 485             acmptr = expmatch (s, l_acmend, dummy);
 486             if (((comtype == STANDARD) && (comptr != NIL)) ||
 487                 ((comtype == ALTERNATE) && (acmptr != NIL))) {
 488                 if (comtype == STANDARD) {
 489                     putKcp (s, comptr-1, TRUE);
 490                     s = comptr;
 491                 } else {
 492                     putKcp (s, acmptr-1, TRUE);
 493                     s = acmptr;
 494                 }
 495                 incomm = FALSE;
 496                 ps("\\c\n'-C\n");
 497                 continue;
 498             } else {
 499                 putKcp (s, s + strlen(s) -1, TRUE);
 500                 s = s + strlen(s);
 501                 continue;
 502             }
 503
 504         /* check for end of string */
 505         } else if (instr) {
 506             if ((strptr = expmatch (s, l_strend, dummy)) != NIL) {
 507                 putKcp (s, strptr-1, TRUE);
 508                 s = strptr;
 509                 instr = FALSE;
 510                 continue;
 511             } else {
 512                 putKcp (s, s+strlen(s)-1, TRUE);
 513                 s = s + strlen(s);
 514                 continue;
 515             }
 516
 517         /* check for end of character string */
 518         } else if (inchr) {
 519             if ((chrptr = expmatch (s, l_chrend, dummy)) != NIL) {
 520                 putKcp (s, chrptr-1, TRUE);
 521                 s = chrptr;
 522                 inchr = FALSE;
 523                 continue;
 524             } else {
 525                 putKcp (s, s+strlen(s)-1, TRUE);
 526                 s = s + strlen(s);
 527                 continue;
 528             }
 529         }
 530
 531         /* print out the line */
 532         putKcp (s, s + strlen(s) -1, FALSE);
 533         s = s + strlen(s);
 534     } while (*s);
 535 }
 536
 537 /* force: true if we should force nokeyw */
 538 static void
 539 putKcp(char *start, char *end, boolean force)
 540 {
 541     int i;
 542     int xfld = 0;
 543
 544     while (start <= end) {
 545         if (idx) {
 546             if (*start == ' ' || *start == '\t') {
 547                 if (xfld == 0)
 548                     printf("\001");
 549                 printf("\t");
 550                 xfld = 1;
 551                 while (*start == ' ' || *start == '\t')
 552                     start++;
 553                 continue;
 554             }
 555         }
 556
 557         /* take care of nice tab stops */
 558         if (*start == '\t') {
 559             while (*start == '\t')
 560                 start++;
 561             i = tabs(s_start, start) - margin / 8;
 562             printf("\\h'|%dn'", i * 10 + 1 - margin % 8);
 563             continue;
 564         }
 565
 566         if (!nokeyw && !force)
 567             if ((*start == '#' || isidchr(*start))
 568             && (start == s_start || !isidchr(start[-1]))) {
 569                 i = iskw(start);
 570                 if (i > 0) {
 571                     ps("\\*(+K");
 572                     do
 573                         putcp((unsigned char)*start++);
 574                     while (--i > 0);
 575                     ps("\\*(-K");
 576                     continue;
 577                 }
 578             }
 579
 580         putcp ((unsigned char)*start++);
 581     }
 582 }
 583
 584
 585 static int
 586 tabs(char *s, char *os)
 587 {
 588
 589     return (width(s, os) / 8);
 590 }
 591
 592 static int
 593 width(char *s, char *os)
 594 {
 595         int i = 0;
 596
 597         while (s < os) {
 598                 if (*s == '\t') {
 599                         i = (i + 8) &~ 7;
 600                         s++;
 601                         continue;
 602                 }
 603                 if (*s < ' ')
 604                         i += 2;
 605                 else
 606                         i++;
 607                 s++;
 608         }
 609         return (i);
 610 }
 611
 612 static void
 613 putcp(int c)
 614 {
 615
 616         switch(c) {
 617
 618         case 0:
 619                 break;
 620
 621         case '\f':
 622                 break;
 623
 624         case '\r':
 625                 break;
 626
 627         case '{':
 628                 ps("\\*(+K{\\*(-K");
 629                 break;
 630
 631         case '}':
 632                 ps("\\*(+K}\\*(-K");
 633                 break;
 634
 635         case '\\':
 636                 ps("\\e");
 637                 break;
 638
 639         case '_':
 640                 ps("\\*_");
 641                 break;
 642
 643         case '-':
 644                 ps("\\*-");
 645                 break;
 646
 647         case '`':
 648                 ps("\\`");
 649                 break;
 650
 651         case '\'':
 652                 ps("\\'");
 653                 break;
 654
 655         case '.':
 656                 ps("\\&.");
 657                 break;
 658
 659         case '*':
 660                 ps("\\fI*\\fP");
 661                 break;
 662
 663         case '/':
 664                 ps("\\fI\\h'\\w' 'u-\\w'/'u'/\\fP");
 665                 break;
 666
 667         default:
 668                 if (c < 040)
 669                         putchar('^'), c |= '@';
 670         case '\t':
 671         case '\n':
 672                 putchar(c);
 673         }
 674 }
 675
 676 /*
 677  *      look for a process beginning on this line
 678  */
 679 static boolean
 680 isproc(char *s)
 681 {
 682     pname[0] = '\0';
 683     if (!l_toplex || blklevel == 0)
 684         if (expmatch (s, l_prcbeg, pname) != NIL) {
 685             return (TRUE);
 686         }
 687     return (FALSE);
 688 }
 689
 690
 691 /*  iskw -      check to see if the next word is a keyword
 692  */
 693
 694 static int
 695 iskw(char *s)
 696 {
 697         char **ss = l_keywds;
 698         int i = 1;
 699         char *cp = s;
 700
 701         while (++cp, isidchr(*cp))
 702                 i++;
 703         while (cp = *ss++)
 704                 if (!STRNCMP(s,cp,i) && !isidchr(cp[i]))
 705                         return (i);
 706         return (0);
 707 }
 708