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Annotation of src/usr.bin/unvis/unvis.c, Revision 1.4

1.4     ! mpech       1: /*     $OpenBSD: unvis.c,v 1.3 1997/01/15 23:43:29 millert Exp $       */
1.2       deraadt     2:
1.1       deraadt     3: /*-
                      4:  * Copyright (c) 1989, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *     This product includes software developed by the University of
                     18:  *     California, Berkeley and its contributors.
                     19:  * 4. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #ifndef lint
                     37: static char copyright[] =
                     38: "@(#) Copyright (c) 1989, 1993\n\
                     39:        The Regents of the University of California.  All rights reserved.\n";
                     40: #endif /* not lint */
                     41:
                     42: #ifndef lint
                     43: #if 0
                     44: static char sccsid[] = "@(#)unvis.c    8.1 (Berkeley) 6/6/93";
                     45: #endif
1.4     ! mpech      46: static char rcsid[] = "$OpenBSD: unvis.c,v 1.3 1997/01/15 23:43:29 millert Exp $";
1.1       deraadt    47: #endif /* not lint */
                     48:
                     49: #include <stdio.h>
                     50: #include <stdlib.h>
                     51: #include <err.h>
                     52: #include <vis.h>
                     53:
                     54: void process __P((FILE *fp, const char *filename));
                     55:
                     56: int
                     57: main(argc, argv)
                     58:        int argc;
                     59:        char *argv[];
                     60: {
                     61:        FILE *fp;
                     62:        int ch;
                     63:
1.3       millert    64:        while ((ch = getopt(argc, argv, "")) != -1)
1.1       deraadt    65:                switch((char)ch) {
                     66:                case '?':
                     67:                default:
                     68:                        (void) fprintf(stderr, "usage: unvis [file...]\n");
                     69:                        exit(1);
                     70:                }
                     71:        argc -= optind;
                     72:        argv += optind;
                     73:
                     74:        if (*argv)
                     75:                while (*argv) {
                     76:                        if ((fp=fopen(*argv, "r")) != NULL)
                     77:                                process(fp, *argv);
                     78:                        else
                     79:                                warn("%s", *argv);
                     80:                        argv++;
                     81:                }
                     82:        else
                     83:                process(stdin, "<stdin>");
                     84:        exit(0);
                     85: }
                     86:
                     87: void
                     88: process(fp, filename)
                     89:        FILE *fp;
                     90:        const char *filename;
                     91: {
1.4     ! mpech      92:        int offset = 0, c, ret;
1.1       deraadt    93:        int state = 0;
                     94:        char outc;
                     95:
                     96:        while ((c = getc(fp)) != EOF) {
                     97:                offset++;
                     98:        again:
                     99:                switch(ret = unvis(&outc, (char)c, &state, 0)) {
                    100:                case UNVIS_VALID:
                    101:                        putchar(outc);
                    102:                        break;
                    103:                case UNVIS_VALIDPUSH:
                    104:                        putchar(outc);
                    105:                        goto again;
                    106:                case UNVIS_SYNBAD:
                    107:                        warnx("%s: offset: %d: can't decode", filename, offset);
                    108:                        state = 0;
                    109:                        break;
                    110:                case 0:
                    111:                case UNVIS_NOCHAR:
                    112:                        break;
                    113:                default:
                    114:                        errx(1, "bad return value (%d), can't happen", ret);
                    115:                        /* NOTREACHED */
                    116:                }
                    117:        }
                    118:        if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
                    119:                putchar(outc);
                    120: }