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Annotation of 43BSDReno/pgrm/unifdef/unifdef.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1985 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Dave Yost.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted
        !             9:  * provided that: (1) source distributions retain this entire copyright
        !            10:  * notice and comment, and (2) distributions including binaries display
        !            11:  * the following acknowledgement:  ``This product includes software
        !            12:  * developed by the University of California, Berkeley and its contributors''
        !            13:  * in the documentation or other materials provided with the distribution
        !            14:  * and in all advertising materials mentioning features or use of this
        !            15:  * software. Neither the name of the University nor the names of its
        !            16:  * contributors may be used to endorse or promote products derived
        !            17:  * from this software without specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            19:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            20:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: char copyright[] =
        !            25: "@(#) Copyright (c) 1985 The Regents of the University of California.\n\
        !            26:  All rights reserved.\n";
        !            27: #endif /* not lint */
        !            28: 
        !            29: #ifndef lint
        !            30: static char sccsid[] = "@(#)unifdef.c  4.7 (Berkeley) 6/1/90";
        !            31: #endif /* not lint */
        !            32: 
        !            33: /*
        !            34:  * unifdef - remove ifdef'ed lines
        !            35:  *
        !            36:  *  Warning: will not work correctly if input contains null characters.
        !            37:  *
        !            38:  *  Wishlist:
        !            39:  *      provide an option which will append the name of the
        !            40:  *        appropriate symbol after #else's and #endif's
        !            41:  *      provide an option which will check symbols after
        !            42:  *        #else's and #endif's to see that they match their
        !            43:  *        corresponding #ifdef or #ifndef
        !            44:  */
        !            45: 
        !            46: #include <stdio.h>
        !            47: #include <ctype.h>
        !            48: 
        !            49: #define BSS
        !            50: FILE *input;
        !            51: #ifndef YES
        !            52: #define YES 1
        !            53: #define NO  0
        !            54: #endif/*YES */
        !            55: typedef int Bool;
        !            56: 
        !            57: char *progname BSS;
        !            58: char *filename BSS;
        !            59: char text BSS;          /* -t option in effect: this is a text file */
        !            60: char lnblank BSS;       /* -l option in effect: blank deleted lines */
        !            61: char complement BSS;    /* -c option in effect: complement the operation */
        !            62: 
        !            63: #define MAXSYMS 100
        !            64: char *symname[MAXSYMS] BSS; /* symbol name */
        !            65: char true[MAXSYMS] BSS;     /* -Dsym */
        !            66: char ignore[MAXSYMS] BSS;   /* -iDsym or -iUsym */
        !            67: char insym[MAXSYMS] BSS;    /* state: false, inactive, true */
        !            68: #define SYM_INACTIVE 0      /* symbol is currently inactive */
        !            69: #define SYM_FALSE    1      /* symbol is currently false */
        !            70: #define SYM_TRUE     2      /* symbol is currently true  */
        !            71: 
        !            72: char nsyms BSS;
        !            73: char incomment BSS;         /* inside C comment */
        !            74: 
        !            75: #define QUOTE_NONE   0
        !            76: #define QUOTE_SINGLE 1
        !            77: #define QUOTE_DOUBLE 2
        !            78: char inquote BSS;           /* inside single or double quotes */
        !            79: 
        !            80: int exitstat BSS;
        !            81: char *skipcomment ();
        !            82: char *skipquote ();
        !            83: 
        !            84: main (argc, argv)
        !            85: int argc;
        !            86: char **argv;
        !            87: {
        !            88:     char **curarg;
        !            89:     register char *cp;
        !            90:     register char *cp1;
        !            91:     char ignorethis;
        !            92: 
        !            93:     progname = argv[0][0] ? argv[0] : "unifdef";
        !            94: 
        !            95:     for (curarg = &argv[1]; --argc > 0; curarg++) {
        !            96:        if (*(cp1 = cp = *curarg) != '-')
        !            97:            break;
        !            98:        if (*++cp1 == 'i') {
        !            99:            ignorethis = YES;
        !           100:            cp1++;
        !           101:        } else
        !           102:            ignorethis = NO;
        !           103:        if (   (   *cp1 == 'D'
        !           104:                || *cp1 == 'U'
        !           105:               )
        !           106:            && cp1[1] != '\0'
        !           107:           ) {
        !           108:            register int symind;
        !           109: 
        !           110:            if ((symind = findsym (&cp1[1])) < 0) {
        !           111:                if (nsyms >= MAXSYMS) {
        !           112:                    prname ();
        !           113:                    fprintf (stderr, "too many symbols.\n");
        !           114:                    exit (2);
        !           115:                }
        !           116:                symind = nsyms++;
        !           117:                symname[symind] = &cp1[1];
        !           118:                insym[symind] = SYM_INACTIVE;
        !           119:            }
        !           120:            ignore[symind] = ignorethis;
        !           121:            true[symind] = *cp1 == 'D' ? YES : NO;
        !           122:        } else if (ignorethis)
        !           123:            goto unrec;
        !           124:        else if (strcmp (&cp[1], "t") == 0)
        !           125:            text = YES;
        !           126:        else if (strcmp (&cp[1], "l") == 0)
        !           127:            lnblank = YES;
        !           128:        else if (strcmp (&cp[1], "c") == 0)
        !           129:            complement = YES;
        !           130:        else {
        !           131:  unrec:
        !           132:            prname ();
        !           133:            fprintf (stderr, "unrecognized option: %s\n", cp);
        !           134:            goto usage;
        !           135:        }
        !           136:     }
        !           137:     if (nsyms == 0) {
        !           138:  usage:
        !           139:        fprintf (stderr, "\
        !           140: Usage: %s [-l] [-t] [-c] [[-Dsym] [-Usym] [-iDsym] [-iUsym]]... [file]\n\
        !           141:     At least one arg from [-D -U -iD -iU] is required\n", progname);
        !           142:        exit (2);
        !           143:     }
        !           144: 
        !           145:     if (argc > 1) {
        !           146:        prname ();
        !           147:        fprintf (stderr, "can only do one file.\n");
        !           148:     } else if (argc == 1) {
        !           149:        filename = *curarg;
        !           150:        if ((input = fopen (filename, "r")) != NULL) {
        !           151:            pfile();
        !           152:            (void) fclose (input);
        !           153:        } else {
        !           154:            prname ();
        !           155:            fprintf (stderr, "can't open ");
        !           156:            perror(*curarg);
        !           157:        }
        !           158:     } else {
        !           159:        filename = "[stdin]";
        !           160:        input = stdin;
        !           161:        pfile();
        !           162:     }
        !           163: 
        !           164:     (void) fflush (stdout);
        !           165:     exit (exitstat);
        !           166: }
        !           167: 
        !           168: /* types of input lines: */
        !           169: typedef int Linetype;
        !           170: #define LT_PLAIN       0   /* ordinary line */
        !           171: #define LT_TRUE        1   /* a true  #ifdef of a symbol known to us */
        !           172: #define LT_FALSE       2   /* a false #ifdef of a symbol known to us */
        !           173: #define LT_OTHER       3   /* an #ifdef of a symbol not known to us */
        !           174: #define LT_IF          4   /* an #ifdef of a symbol not known to us */
        !           175: #define LT_ELSE        5   /* #else */
        !           176: #define LT_ENDIF       6   /* #endif */
        !           177: #define LT_LEOF        7   /* end of file */
        !           178: extern Linetype checkline ();
        !           179: 
        !           180: typedef int Reject_level;
        !           181: Reject_level reject BSS;    /* 0 or 1: pass thru; 1 or 2: ignore comments */
        !           182: #define REJ_NO          0
        !           183: #define REJ_IGNORE      1
        !           184: #define REJ_YES         2
        !           185: 
        !           186: int linenum BSS;    /* current line number */
        !           187: int stqcline BSS;   /* start of current coment or quote */
        !           188: char *errs[] = {
        !           189: #define NO_ERR      0
        !           190:                        "",
        !           191: #define END_ERR     1
        !           192:                        "",
        !           193: #define ELSE_ERR    2
        !           194:                        "Inappropriate else",
        !           195: #define ENDIF_ERR   3
        !           196:                        "Inappropriate endif",
        !           197: #define IEOF_ERR    4
        !           198:                        "Premature EOF in ifdef",
        !           199: #define CEOF_ERR    5
        !           200:                        "Premature EOF in comment",
        !           201: #define Q1EOF_ERR   6
        !           202:                        "Premature EOF in quoted character",
        !           203: #define Q2EOF_ERR   7
        !           204:                        "Premature EOF in quoted string"
        !           205: };
        !           206: 
        !           207: /* States for inif arg to doif */
        !           208: #define IN_NONE 0
        !           209: #define IN_IF   1
        !           210: #define IN_ELSE 2
        !           211: 
        !           212: pfile ()
        !           213: {
        !           214:     reject = REJ_NO;
        !           215:     (void) doif (-1, IN_NONE, reject, 0);
        !           216:     return;
        !           217: }
        !           218: 
        !           219: int
        !           220: doif (thissym, inif, prevreject, depth)
        !           221: register int thissym;   /* index of the symbol who was last ifdef'ed */
        !           222: int inif;               /* YES or NO we are inside an ifdef */
        !           223: Reject_level prevreject;/* previous value of reject */
        !           224: int depth;              /* depth of ifdef's */
        !           225: {
        !           226:     register Linetype lineval;
        !           227:     register Reject_level thisreject;
        !           228:     int doret;          /* tmp return value of doif */
        !           229:     int cursym;         /* index of the symbol returned by checkline */
        !           230:     int stline;         /* line number when called this time */
        !           231: 
        !           232:     stline = linenum;
        !           233:     for (;;) {
        !           234:        switch (lineval = checkline (&cursym)) {
        !           235:        case LT_PLAIN:
        !           236:            flushline (YES);
        !           237:            break;
        !           238: 
        !           239:        case LT_TRUE:
        !           240:        case LT_FALSE:
        !           241:            thisreject = reject;
        !           242:            if (lineval == LT_TRUE)
        !           243:                insym[cursym] = SYM_TRUE;
        !           244:            else {
        !           245:                if (reject != REJ_YES)
        !           246:                    reject = ignore[cursym] ? REJ_IGNORE : REJ_YES;
        !           247:                insym[cursym] = SYM_FALSE;
        !           248:            }
        !           249:            if (ignore[cursym])
        !           250:                flushline (YES);
        !           251:            else {
        !           252:                exitstat = 1;
        !           253:                flushline (NO);
        !           254:            }
        !           255:            if ((doret = doif (cursym, IN_IF, thisreject, depth + 1)) != NO_ERR)
        !           256:                return error (doret, stline, depth);
        !           257:            break;
        !           258: 
        !           259:        case LT_IF:
        !           260:        case LT_OTHER:
        !           261:            flushline (YES);
        !           262:            if ((doret = doif (-1, IN_IF, reject, depth + 1)) != NO_ERR)
        !           263:                return error (doret, stline, depth);
        !           264:            break;
        !           265: 
        !           266:        case LT_ELSE:
        !           267:            if (inif != IN_IF)
        !           268:                return error (ELSE_ERR, linenum, depth);
        !           269:            inif = IN_ELSE;
        !           270:            if (thissym >= 0) {
        !           271:                if (insym[thissym] == SYM_TRUE) {
        !           272:                    reject = ignore[thissym] ? REJ_IGNORE : REJ_YES;
        !           273:                    insym[thissym] = SYM_FALSE;
        !           274:                } else { /* (insym[thissym] == SYM_FALSE) */
        !           275:                    reject = prevreject;
        !           276:                    insym[thissym] = SYM_TRUE;
        !           277:                }
        !           278:                if (!ignore[thissym]) {
        !           279:                    flushline (NO);
        !           280:                    break;
        !           281:                }
        !           282:            }
        !           283:            flushline (YES);
        !           284:            break;
        !           285: 
        !           286:        case LT_ENDIF:
        !           287:            if (inif == IN_NONE)
        !           288:                return error (ENDIF_ERR, linenum, depth);
        !           289:            if (thissym >= 0) {
        !           290:                insym[thissym] = SYM_INACTIVE;
        !           291:                reject = prevreject;
        !           292:                if (!ignore[thissym]) {
        !           293:                    flushline (NO);
        !           294:                    return NO_ERR;
        !           295:                }
        !           296:            }
        !           297:            flushline (YES);
        !           298:            return NO_ERR;
        !           299: 
        !           300:        case LT_LEOF: {
        !           301:            int err;
        !           302:            err =   incomment
        !           303:                  ? CEOF_ERR
        !           304:                  : inquote == QUOTE_SINGLE
        !           305:                  ? Q1EOF_ERR
        !           306:                  : inquote == QUOTE_DOUBLE
        !           307:                  ? Q2EOF_ERR
        !           308:                  : NO_ERR;
        !           309:            if (inif != IN_NONE) {
        !           310:                if (err != NO_ERR)
        !           311:                    (void) error (err, stqcline, depth);
        !           312:                return error (IEOF_ERR, stline, depth);
        !           313:            } else if (err != NO_ERR)
        !           314:                return error (err, stqcline, depth);
        !           315:            else
        !           316:                return NO_ERR;
        !           317:            }
        !           318:        }
        !           319:     }
        !           320: }
        !           321: 
        !           322: #define endsym(c) (!isalpha (c) && !isdigit (c) && c != '_')
        !           323: 
        !           324: #define MAXLINE 256
        !           325: char tline[MAXLINE] BSS;
        !           326: 
        !           327: Linetype
        !           328: checkline (cursym)
        !           329: int *cursym;    /* if LT_TRUE or LT_FALSE returned, set this to sym index */
        !           330: {
        !           331:     register char *cp;
        !           332:     register char *symp;
        !           333:     char *scp;
        !           334:     Linetype retval;
        !           335: #   define KWSIZE 8
        !           336:     char keyword[KWSIZE];
        !           337: 
        !           338:     linenum++;
        !           339:     if (getlin (tline, sizeof tline, input, NO) == EOF)
        !           340:        return LT_LEOF;
        !           341: 
        !           342:     retval = LT_PLAIN;
        !           343:     if (   *(cp = tline) != '#'
        !           344:        || incomment
        !           345:        || inquote == QUOTE_SINGLE
        !           346:        || inquote == QUOTE_DOUBLE
        !           347:        )
        !           348:        goto eol;
        !           349: 
        !           350:     cp = skipcomment (++cp);
        !           351:     symp = keyword;
        !           352:     while (!endsym (*cp)) {
        !           353:        *symp = *cp++;
        !           354:        if (++symp >= &keyword[KWSIZE])
        !           355:            goto eol;
        !           356:     }
        !           357:     *symp = '\0';
        !           358: 
        !           359:     if (strcmp (keyword, "ifdef") == 0) {
        !           360:        retval = YES;
        !           361:        goto ifdef;
        !           362:     } else if (strcmp (keyword, "ifndef") == 0) {
        !           363:        retval = NO;
        !           364:  ifdef:
        !           365:        scp = cp = skipcomment (++cp);
        !           366:        if (incomment) {
        !           367:            retval = LT_PLAIN;
        !           368:            goto eol;
        !           369:        }
        !           370:        {
        !           371:            int symind;
        !           372: 
        !           373:            if ((symind = findsym (scp)) >= 0)
        !           374:                retval = (retval ^ true[*cursym = symind])
        !           375:                         ? LT_FALSE : LT_TRUE;
        !           376:            else
        !           377:                retval = LT_OTHER;
        !           378:        }
        !           379:     } else if (strcmp (keyword, "if") == 0)
        !           380:        retval = LT_IF;
        !           381:     else if (strcmp (keyword, "else") == 0)
        !           382:        retval = LT_ELSE;
        !           383:     else if (strcmp (keyword, "endif") == 0)
        !           384:        retval = LT_ENDIF;
        !           385: 
        !           386:  eol:
        !           387:     if (!text && reject != REJ_IGNORE)
        !           388:        for (; *cp; ) {
        !           389:            if (incomment)
        !           390:                cp = skipcomment (cp);
        !           391:            else if (inquote == QUOTE_SINGLE)
        !           392:                cp = skipquote (cp, QUOTE_SINGLE);
        !           393:            else if (inquote == QUOTE_DOUBLE)
        !           394:                cp = skipquote (cp, QUOTE_DOUBLE);
        !           395:            else if (*cp == '/' && cp[1] == '*')
        !           396:                cp = skipcomment (cp);
        !           397:            else if (*cp == '\'')
        !           398:                cp = skipquote (cp, QUOTE_SINGLE);
        !           399:            else if (*cp == '"')
        !           400:                cp = skipquote (cp, QUOTE_DOUBLE);
        !           401:            else
        !           402:                cp++;
        !           403:        }
        !           404:     return retval;
        !           405: }
        !           406: 
        !           407: /*
        !           408:  *  Skip over comments and stop at the next charaacter
        !           409:  *  position that is not whitespace.
        !           410:  */
        !           411: char *
        !           412: skipcomment (cp)
        !           413: register char *cp;
        !           414: {
        !           415:     if (incomment)
        !           416:        goto inside;
        !           417:     for (;; cp++) {
        !           418:        while (*cp == ' ' || *cp == '\t')
        !           419:            cp++;
        !           420:        if (text)
        !           421:            return cp;
        !           422:        if (   cp[0] != '/'
        !           423:            || cp[1] != '*'
        !           424:           )
        !           425:            return cp;
        !           426:        cp += 2;
        !           427:        if (!incomment) {
        !           428:            incomment = YES;
        !           429:            stqcline = linenum;
        !           430:        }
        !           431:  inside:
        !           432:        for (;;) {
        !           433:            for (; *cp != '*'; cp++)
        !           434:                if (*cp == '\0')
        !           435:                    return cp;
        !           436:            if (*++cp == '/') {
        !           437:                incomment = NO;
        !           438:                break;
        !           439:            }
        !           440:        }
        !           441:     }
        !           442: }
        !           443: 
        !           444: /*
        !           445:  *  Skip over a quoted string or character and stop at the next charaacter
        !           446:  *  position that is not whitespace.
        !           447:  */
        !           448: char *
        !           449: skipquote (cp, type)
        !           450: register char *cp;
        !           451: register int type;
        !           452: {
        !           453:     register char qchar;
        !           454: 
        !           455:     qchar = type == QUOTE_SINGLE ? '\'' : '"';
        !           456: 
        !           457:     if (inquote == type)
        !           458:        goto inside;
        !           459:     for (;; cp++) {
        !           460:        if (*cp != qchar)
        !           461:            return cp;
        !           462:        cp++;
        !           463:        inquote = type;
        !           464:        stqcline = linenum;
        !           465:  inside:
        !           466:        for (; ; cp++) {
        !           467:            if (*cp == qchar)
        !           468:                break;
        !           469:            if (   *cp == '\0'
        !           470:                || *cp == '\\' && *++cp == '\0'
        !           471:               )
        !           472:                return cp;
        !           473:        }
        !           474:        inquote = QUOTE_NONE;
        !           475:     }
        !           476: }
        !           477: 
        !           478: /*
        !           479:  *  findsym - look for the symbol in the symbol table.
        !           480:  *            if found, return symbol table index,
        !           481:  *            else return -1.
        !           482:  */
        !           483: int
        !           484: findsym (str)
        !           485: char *str;
        !           486: {
        !           487:     register char *cp;
        !           488:     register char *symp;
        !           489:     register int symind;
        !           490:     register char chr;
        !           491: 
        !           492:     for (symind = 0; symind < nsyms; ++symind) {
        !           493:        if (insym[symind] == SYM_INACTIVE) {
        !           494:            for ( symp = symname[symind], cp = str
        !           495:                ; *symp && *cp == *symp
        !           496:                ; cp++, symp++
        !           497:                )
        !           498:                continue;
        !           499:            chr = *cp;
        !           500:            if (*symp == '\0' && endsym (chr))
        !           501:                return symind;
        !           502:        }
        !           503:     }
        !           504:     return -1;
        !           505: }
        !           506: 
        !           507: /*
        !           508:  *   getlin - expands tabs if asked for
        !           509:  *            and (if compiled in) treats form-feed as an end-of-line
        !           510:  */
        !           511: int
        !           512: getlin (line, maxline, inp, expandtabs)
        !           513: register char *line;
        !           514: int maxline;
        !           515: FILE *inp;
        !           516: int expandtabs;
        !           517: {
        !           518:     int tmp;
        !           519:     register int num;
        !           520:     register int chr;
        !           521: #ifdef  FFSPECIAL
        !           522:     static char havechar = NO;  /* have leftover char from last time */
        !           523:     static char svchar BSS;
        !           524: #endif/*FFSPECIAL */
        !           525: 
        !           526:     num = 0;
        !           527: #ifdef  FFSPECIAL
        !           528:     if (havechar) {
        !           529:        havechar = NO;
        !           530:        chr = svchar;
        !           531:        goto ent;
        !           532:     }
        !           533: #endif/*FFSPECIAL */
        !           534:     while (num + 8 < maxline) {   /* leave room for tab */
        !           535:        chr = getc (inp);
        !           536:        if (isprint (chr)) {
        !           537: #ifdef  FFSPECIAL
        !           538:  ent:
        !           539: #endif/*FFSPECIAL */
        !           540:            *line++ = chr;
        !           541:            num++;
        !           542:        } else
        !           543:            switch (chr) {
        !           544:            case EOF:
        !           545:                return EOF;
        !           546: 
        !           547:            case '\t':
        !           548:                if (expandtabs) {
        !           549:                    num += tmp = 8 - (num & 7);
        !           550:                    do
        !           551:                        *line++ = ' ';
        !           552:                    while (--tmp);
        !           553:                    break;
        !           554:                }
        !           555:            default:
        !           556:                *line++ = chr;
        !           557:                num++;
        !           558:                break;
        !           559: 
        !           560:            case '\n':
        !           561:                *line = '\n';
        !           562:                num++;
        !           563:                goto end;
        !           564: 
        !           565: #ifdef  FFSPECIAL
        !           566:            case '\f':
        !           567:                if (++num == 1)
        !           568:                    *line = '\f';
        !           569:                else {
        !           570:                    *line = '\n';
        !           571:                    havechar = YES;
        !           572:                    svchar = chr;
        !           573:                }
        !           574:                goto end;
        !           575: #endif/*FFSPECIAL */
        !           576:            }
        !           577:     }
        !           578:  end:
        !           579:     *++line = '\0';
        !           580:     return num;
        !           581: }
        !           582: 
        !           583: flushline (keep)
        !           584: Bool keep;
        !           585: {
        !           586:     if ((keep && reject != REJ_YES) ^ complement) {
        !           587:        register char *line = tline;
        !           588:        register FILE *out = stdout;
        !           589:        register char chr;
        !           590: 
        !           591:        while (chr = *line++)
        !           592:            putc (chr, out);
        !           593:     } else if (lnblank)
        !           594:        putc ('\n', stdout);
        !           595:     return;
        !           596: }
        !           597: 
        !           598: prname ()
        !           599: {
        !           600:     fprintf (stderr, "%s: ", progname);
        !           601:     return;
        !           602: }
        !           603: 
        !           604: int
        !           605: error (err, line, depth)
        !           606: int err;        /* type of error & index into error string array */
        !           607: int line;       /* line number */
        !           608: int depth;      /* how many ifdefs we are inside */
        !           609: {
        !           610:     if (err == END_ERR)
        !           611:        return err;
        !           612: 
        !           613:     prname ();
        !           614: 
        !           615: #ifndef TESTING
        !           616:     fprintf (stderr, "Error in %s line %d: %s.\n", filename, line, errs[err]);
        !           617: #else/* TESTING */
        !           618:     fprintf (stderr, "Error in %s line %d: %s. ", filename, line, errs[err]);
        !           619:     fprintf (stderr, "ifdef depth: %d\n", depth);
        !           620: #endif/*TESTING */
        !           621: 
        !           622:     exitstat = 2;
        !           623:     return depth > 1 ? IEOF_ERR : END_ERR;
        !           624: }

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