640 lines
14 KiB
C
640 lines
14 KiB
C
/*
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* Copyright (c) 1985, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Dave Yost.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1985, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)unifdef.c 8.1 (Berkeley) 6/6/93";
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#endif
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/*
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* unifdef - remove ifdef'ed lines
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*
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* Warning: will not work correctly if input contains null characters.
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*
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* Wishlist:
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* provide an option which will append the name of the
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* appropriate symbol after #else's and #endif's
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* provide an option which will check symbols after
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* #else's and #endif's to see that they match their
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* corresponding #ifdef or #ifndef
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*/
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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typedef int Reject_level;
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#define BSS
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FILE *input;
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#ifndef YES
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#define YES 1
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#define NO 0
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#endif/*YES */
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typedef int Bool;
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typedef int Linetype;
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const char *filename BSS;
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char text BSS; /* -t option in effect: this is a text file */
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char lnblank BSS; /* -l option in effect: blank deleted lines */
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char complement BSS; /* -c option in effect: complement the operation */
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#define MAXSYMS 100
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char *symname[MAXSYMS] BSS; /* symbol name */
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char true[MAXSYMS] BSS; /* -Dsym */
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char ignore[MAXSYMS] BSS; /* -iDsym or -iUsym */
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char insym[MAXSYMS] BSS; /* state: false, inactive, true */
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#define SYM_INACTIVE 0 /* symbol is currently inactive */
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#define SYM_FALSE 1 /* symbol is currently false */
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#define SYM_TRUE 2 /* symbol is currently true */
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char nsyms BSS;
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char incomment BSS; /* inside C comment */
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#define QUOTE_NONE 0
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#define QUOTE_SINGLE 1
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#define QUOTE_DOUBLE 2
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char inquote BSS; /* inside single or double quotes */
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int exitstat BSS;
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char *skipcomment(char *);
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char *skipquote(char *, int);
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static void usage(void);
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void flushline(Bool);
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int getlin(char *, int, FILE *, int);
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int error(int, int, int);
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void pfile(void);
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int doif(int, int, Reject_level, int);
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int findsym(char *);
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Linetype checkline(int *);
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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char **curarg;
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char *cp;
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char *cp1;
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char ignorethis;
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for (curarg = &argv[1]; --argc > 0; curarg++) {
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if (*(cp1 = cp = *curarg) != '-')
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break;
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if (*++cp1 == 'i') {
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ignorethis = YES;
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cp1++;
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} else
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ignorethis = NO;
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if ( ( *cp1 == 'D'
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|| *cp1 == 'U'
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)
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&& cp1[1] != '\0'
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) {
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int symind;
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if ((symind = findsym (&cp1[1])) < 0) {
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if (nsyms >= MAXSYMS)
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errx(2, "too many symbols");
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symind = nsyms++;
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symname[symind] = &cp1[1];
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insym[symind] = SYM_INACTIVE;
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}
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ignore[symind] = ignorethis;
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true[symind] = *cp1 == 'D' ? YES : NO;
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} else if (ignorethis)
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goto unrec;
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else if (strcmp (&cp[1], "t") == 0)
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text = YES;
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else if (strcmp (&cp[1], "l") == 0)
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lnblank = YES;
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else if (strcmp (&cp[1], "c") == 0)
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complement = YES;
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else {
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unrec:
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warnx("unrecognized option: %s", cp);
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usage();
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}
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}
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if (nsyms == 0)
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usage();
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if (argc > 1) {
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warnx("can only do one file");
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} else if (argc == 1) {
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filename = *curarg;
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if ((input = fopen (filename, "r")) != NULL) {
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pfile();
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(void) fclose (input);
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} else {
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warn("can't open %s", *curarg);
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}
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} else {
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filename = "[stdin]";
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input = stdin;
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pfile();
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}
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(void) fflush (stdout);
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exit (exitstat);
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}
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static void
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usage()
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{
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fprintf (stderr, "usage: %s",
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"unifdef [-l] [-t] [-c] [[-Dsym] [-Usym] [-iDsym] [-iUsym]] ... [file]\n");
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exit (2);
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}
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/* types of input lines: */
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#define LT_PLAIN 0 /* ordinary line */
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#define LT_TRUE 1 /* a true #ifdef of a symbol known to us */
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#define LT_FALSE 2 /* a false #ifdef of a symbol known to us */
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#define LT_OTHER 3 /* an #ifdef of a symbol not known to us */
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#define LT_IF 4 /* an #ifdef of a symbol not known to us */
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#define LT_ELSE 5 /* #else */
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#define LT_ENDIF 6 /* #endif */
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#define LT_LEOF 7 /* end of file */
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Reject_level reject BSS; /* 0 or 1: pass thru; 1 or 2: ignore comments */
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#define REJ_NO 0
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#define REJ_IGNORE 1
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#define REJ_YES 2
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int linenum BSS; /* current line number */
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int stqcline BSS; /* start of current coment or quote */
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const char *errs[] = {
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#define NO_ERR 0
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"",
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#define END_ERR 1
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"",
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#define ELSE_ERR 2
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"Inappropriate else",
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#define ENDIF_ERR 3
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"Inappropriate endif",
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#define IEOF_ERR 4
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"Premature EOF in ifdef",
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#define CEOF_ERR 5
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"Premature EOF in comment",
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#define Q1EOF_ERR 6
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"Premature EOF in quoted character",
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#define Q2EOF_ERR 7
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"Premature EOF in quoted string"
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};
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/* States for inif arg to doif */
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#define IN_NONE 0
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#define IN_IF 1
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#define IN_ELSE 2
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void
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pfile ()
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{
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reject = REJ_NO;
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(void) doif (-1, IN_NONE, reject, 0);
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}
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int
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doif (thissym, inif, prevreject, depth)
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int thissym; /* index of the symbol who was last ifdef'ed */
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int inif; /* YES or NO we are inside an ifdef */
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Reject_level prevreject;/* previous value of reject */
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int depth; /* depth of ifdef's */
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{
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Linetype lineval;
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Reject_level thisreject;
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int doret; /* tmp return value of doif */
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int cursym; /* index of the symbol returned by checkline */
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int stline; /* line number when called this time */
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stline = linenum;
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for (;;) {
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switch (lineval = checkline (&cursym)) {
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case LT_PLAIN:
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flushline (YES);
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break;
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case LT_TRUE:
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case LT_FALSE:
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thisreject = reject;
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if (lineval == LT_TRUE)
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insym[cursym] = SYM_TRUE;
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else {
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if (reject != REJ_YES)
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reject = ignore[cursym] ? REJ_IGNORE : REJ_YES;
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insym[cursym] = SYM_FALSE;
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}
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if (ignore[cursym])
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flushline (YES);
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else {
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exitstat = 1;
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flushline (NO);
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}
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if ((doret = doif (cursym, IN_IF, thisreject, depth + 1)) != NO_ERR)
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return error (doret, stline, depth);
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break;
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case LT_IF:
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case LT_OTHER:
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flushline (YES);
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if ((doret = doif (-1, IN_IF, reject, depth + 1)) != NO_ERR)
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return error (doret, stline, depth);
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break;
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case LT_ELSE:
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if (inif != IN_IF)
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return error (ELSE_ERR, linenum, depth);
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inif = IN_ELSE;
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if (thissym >= 0) {
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if (insym[thissym] == SYM_TRUE) {
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reject = ignore[thissym] ? REJ_IGNORE : REJ_YES;
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insym[thissym] = SYM_FALSE;
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} else { /* (insym[thissym] == SYM_FALSE) */
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reject = prevreject;
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insym[thissym] = SYM_TRUE;
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}
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if (!ignore[thissym]) {
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flushline (NO);
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break;
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}
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}
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flushline (YES);
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break;
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case LT_ENDIF:
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if (inif == IN_NONE)
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return error (ENDIF_ERR, linenum, depth);
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if (thissym >= 0) {
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insym[thissym] = SYM_INACTIVE;
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reject = prevreject;
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if (!ignore[thissym]) {
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flushline (NO);
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return NO_ERR;
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}
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}
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flushline (YES);
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return NO_ERR;
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case LT_LEOF: {
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int lerr;
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lerr = incomment
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? CEOF_ERR
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: inquote == QUOTE_SINGLE
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? Q1EOF_ERR
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: inquote == QUOTE_DOUBLE
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? Q2EOF_ERR
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: NO_ERR;
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if (inif != IN_NONE) {
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if (lerr != NO_ERR)
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(void) error (lerr, stqcline, depth);
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return error (IEOF_ERR, stline, depth);
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} else if (lerr != NO_ERR)
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return error (lerr, stqcline, depth);
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else
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return NO_ERR;
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}
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}
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}
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}
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#define endsym(c) (!isalpha (c) && !isdigit (c) && c != '_')
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#define MAXLINE 256
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char tline[MAXLINE] BSS;
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Linetype
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checkline (cursym)
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int *cursym; /* if LT_TRUE or LT_FALSE returned, set this to sym index */
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{
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char *cp;
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char *symp;
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char *scp;
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Linetype retval;
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# define KWSIZE 8
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char keyword[KWSIZE];
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linenum++;
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if (getlin (tline, sizeof tline, input, NO) == EOF)
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return LT_LEOF;
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retval = LT_PLAIN;
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if ( *(cp = tline) != '#'
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|| incomment
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|| inquote == QUOTE_SINGLE
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|| inquote == QUOTE_DOUBLE
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)
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goto eol;
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cp = skipcomment (++cp);
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symp = keyword;
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while (!endsym (*cp)) {
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*symp = *cp++;
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if (++symp >= &keyword[KWSIZE])
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goto eol;
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}
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*symp = '\0';
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if (strcmp (keyword, "ifdef") == 0) {
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retval = YES;
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goto ifdef;
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} else if (strcmp (keyword, "ifndef") == 0) {
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retval = NO;
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ifdef:
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scp = cp = skipcomment (++cp);
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if (incomment) {
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retval = LT_PLAIN;
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goto eol;
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}
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{
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int symind;
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if ((symind = findsym (scp)) >= 0)
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retval = (retval ^ true[*cursym = symind])
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? LT_FALSE : LT_TRUE;
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else
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retval = LT_OTHER;
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}
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} else if (strcmp (keyword, "if") == 0)
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retval = LT_IF;
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else if (strcmp (keyword, "else") == 0)
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retval = LT_ELSE;
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else if (strcmp (keyword, "endif") == 0)
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retval = LT_ENDIF;
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eol:
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if (!text && reject != REJ_IGNORE)
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for (; *cp; ) {
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if (incomment)
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cp = skipcomment (cp);
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else if (inquote == QUOTE_SINGLE)
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cp = skipquote (cp, QUOTE_SINGLE);
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else if (inquote == QUOTE_DOUBLE)
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cp = skipquote (cp, QUOTE_DOUBLE);
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else if (*cp == '/' && cp[1] == '*')
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cp = skipcomment (cp);
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else if (*cp == '\'')
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cp = skipquote (cp, QUOTE_SINGLE);
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else if (*cp == '"')
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cp = skipquote (cp, QUOTE_DOUBLE);
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else
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cp++;
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}
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return retval;
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}
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/*
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* Skip over comments and stop at the next charaacter
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* position that is not whitespace.
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*/
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char *
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skipcomment (cp)
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char *cp;
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{
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if (incomment)
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goto inside;
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for (;; cp++) {
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while (*cp == ' ' || *cp == '\t')
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cp++;
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if (text)
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return cp;
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if ( cp[0] != '/'
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|| cp[1] != '*'
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)
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return cp;
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cp += 2;
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if (!incomment) {
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incomment = YES;
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stqcline = linenum;
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}
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inside:
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for (;;) {
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for (; *cp != '*'; cp++)
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if (*cp == '\0')
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return cp;
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if (*++cp == '/') {
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incomment = NO;
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break;
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}
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}
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}
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}
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/*
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* Skip over a quoted string or character and stop at the next charaacter
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* position that is not whitespace.
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*/
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char *
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skipquote (cp, type)
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char *cp;
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int type;
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{
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char qchar;
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qchar = type == QUOTE_SINGLE ? '\'' : '"';
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if (inquote == type)
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goto inside;
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for (;; cp++) {
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if (*cp != qchar)
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return cp;
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cp++;
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inquote = type;
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stqcline = linenum;
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inside:
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for (; ; cp++) {
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if (*cp == qchar)
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break;
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if ( *cp == '\0'
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|| (*cp == '\\' && *++cp == '\0')
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)
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return cp;
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}
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inquote = QUOTE_NONE;
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}
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}
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/*
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* findsym - look for the symbol in the symbol table.
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* if found, return symbol table index,
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* else return -1.
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*/
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int
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findsym (str)
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char *str;
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{
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char *cp;
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char *symp;
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int symind;
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char chr;
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for (symind = 0; symind < nsyms; ++symind) {
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if (insym[symind] == SYM_INACTIVE) {
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for ( symp = symname[symind], cp = str
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; *symp && *cp == *symp
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; cp++, symp++
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)
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continue;
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chr = *cp;
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if (*symp == '\0' && endsym (chr))
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return symind;
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}
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}
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return -1;
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}
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/*
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* getlin - expands tabs if asked for
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* and (if compiled in) treats form-feed as an end-of-line
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*/
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int
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getlin (line, maxline, inp, expandtabs)
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char *line;
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int maxline;
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FILE *inp;
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int expandtabs;
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{
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int tmp;
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int num;
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int chr;
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#ifdef FFSPECIAL
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static char havechar = NO; /* have leftover char from last time */
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static char svchar BSS;
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#endif/*FFSPECIAL */
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num = 0;
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#ifdef FFSPECIAL
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if (havechar) {
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havechar = NO;
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chr = svchar;
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goto ent;
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}
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#endif/*FFSPECIAL */
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while (num + 8 < maxline) { /* leave room for tab */
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chr = getc (inp);
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if (isprint (chr)) {
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#ifdef FFSPECIAL
|
|
ent:
|
|
#endif/*FFSPECIAL */
|
|
*line++ = chr;
|
|
num++;
|
|
} else
|
|
switch (chr) {
|
|
case EOF:
|
|
return EOF;
|
|
|
|
case '\t':
|
|
if (expandtabs) {
|
|
num += tmp = 8 - (num & 7);
|
|
do
|
|
*line++ = ' ';
|
|
while (--tmp);
|
|
break;
|
|
}
|
|
default:
|
|
*line++ = chr;
|
|
num++;
|
|
break;
|
|
|
|
case '\n':
|
|
*line = '\n';
|
|
num++;
|
|
goto end;
|
|
|
|
#ifdef FFSPECIAL
|
|
case '\f':
|
|
if (++num == 1)
|
|
*line = '\f';
|
|
else {
|
|
*line = '\n';
|
|
havechar = YES;
|
|
svchar = chr;
|
|
}
|
|
goto end;
|
|
#endif/*FFSPECIAL */
|
|
}
|
|
}
|
|
end:
|
|
*++line = '\0';
|
|
return num;
|
|
}
|
|
|
|
void
|
|
flushline (keep)
|
|
Bool keep;
|
|
{
|
|
if ((keep && reject != REJ_YES) ^ complement) {
|
|
char *line = tline;
|
|
FILE *out = stdout;
|
|
char chr;
|
|
|
|
while ((chr = *line++))
|
|
putc (chr, out);
|
|
} else if (lnblank)
|
|
putc ('\n', stdout);
|
|
}
|
|
|
|
int
|
|
error (lerr, line, depth)
|
|
int lerr; /* type of error & index into error string array */
|
|
int line; /* line number */
|
|
int depth; /* how many ifdefs we are inside */
|
|
{
|
|
if (lerr == END_ERR)
|
|
return lerr;
|
|
|
|
#ifndef TESTING
|
|
warnx("error in %s line %d: %s", filename, line, errs[lerr]);
|
|
#else/* TESTING */
|
|
warnx("error in %s line %d: %s. ifdef depth: %d",
|
|
filename, line, errs[lerr], depth);
|
|
#endif/*TESTING */
|
|
|
|
exitstat = 2;
|
|
return depth > 1 ? IEOF_ERR : END_ERR;
|
|
}
|