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Annotation of src/usr.bin/unvis/unvis.c, Revision 1.6

1.6     ! millert     1: /*     $OpenBSD: unvis.c,v 1.5 2002/02/16 21:27:56 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.
1.6     ! millert    15:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
                     31:
                     32: #ifndef lint
                     33: static char copyright[] =
                     34: "@(#) Copyright (c) 1989, 1993\n\
                     35:        The Regents of the University of California.  All rights reserved.\n";
                     36: #endif /* not lint */
                     37:
                     38: #ifndef lint
                     39: #if 0
                     40: static char sccsid[] = "@(#)unvis.c    8.1 (Berkeley) 6/6/93";
                     41: #endif
1.6     ! millert    42: static char rcsid[] = "$OpenBSD: unvis.c,v 1.5 2002/02/16 21:27:56 millert Exp $";
1.1       deraadt    43: #endif /* not lint */
                     44:
                     45: #include <stdio.h>
                     46: #include <stdlib.h>
                     47: #include <err.h>
                     48: #include <vis.h>
                     49:
1.5       millert    50: void process(FILE *fp, const char *filename);
1.1       deraadt    51:
                     52: int
                     53: main(argc, argv)
                     54:        int argc;
                     55:        char *argv[];
                     56: {
                     57:        FILE *fp;
                     58:        int ch;
                     59:
1.3       millert    60:        while ((ch = getopt(argc, argv, "")) != -1)
1.1       deraadt    61:                switch((char)ch) {
                     62:                case '?':
                     63:                default:
                     64:                        (void) fprintf(stderr, "usage: unvis [file...]\n");
                     65:                        exit(1);
                     66:                }
                     67:        argc -= optind;
                     68:        argv += optind;
                     69:
                     70:        if (*argv)
                     71:                while (*argv) {
                     72:                        if ((fp=fopen(*argv, "r")) != NULL)
                     73:                                process(fp, *argv);
                     74:                        else
                     75:                                warn("%s", *argv);
                     76:                        argv++;
                     77:                }
                     78:        else
                     79:                process(stdin, "<stdin>");
                     80:        exit(0);
                     81: }
                     82:
                     83: void
                     84: process(fp, filename)
                     85:        FILE *fp;
                     86:        const char *filename;
                     87: {
1.4       mpech      88:        int offset = 0, c, ret;
1.1       deraadt    89:        int state = 0;
                     90:        char outc;
                     91:
                     92:        while ((c = getc(fp)) != EOF) {
                     93:                offset++;
                     94:        again:
                     95:                switch(ret = unvis(&outc, (char)c, &state, 0)) {
                     96:                case UNVIS_VALID:
                     97:                        putchar(outc);
                     98:                        break;
                     99:                case UNVIS_VALIDPUSH:
                    100:                        putchar(outc);
                    101:                        goto again;
                    102:                case UNVIS_SYNBAD:
                    103:                        warnx("%s: offset: %d: can't decode", filename, offset);
                    104:                        state = 0;
                    105:                        break;
                    106:                case 0:
                    107:                case UNVIS_NOCHAR:
                    108:                        break;
                    109:                default:
                    110:                        errx(1, "bad return value (%d), can't happen", ret);
                    111:                        /* NOTREACHED */
                    112:                }
                    113:        }
                    114:        if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
                    115:                putchar(outc);
                    116: }