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Annotation of src/usr.bin/unvis/unvis.c, Revision 1.9

1.9     ! deraadt     1: /*     $OpenBSD: unvis.c,v 1.8 2008/07/06 13:49:35 sobrado 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: #include <stdio.h>
                     33: #include <stdlib.h>
                     34: #include <err.h>
                     35: #include <vis.h>
                     36:
1.5       millert    37: void process(FILE *fp, const char *filename);
1.1       deraadt    38:
                     39: int
1.7       deraadt    40: main(int argc, char *argv[])
1.1       deraadt    41: {
                     42:        FILE *fp;
                     43:        int ch;
                     44:
1.3       millert    45:        while ((ch = getopt(argc, argv, "")) != -1)
1.1       deraadt    46:                switch((char)ch) {
                     47:                case '?':
                     48:                default:
1.8       sobrado    49:                        (void) fprintf(stderr, "usage: unvis [file ...]\n");
1.1       deraadt    50:                        exit(1);
                     51:                }
                     52:        argc -= optind;
                     53:        argv += optind;
                     54:
                     55:        if (*argv)
                     56:                while (*argv) {
                     57:                        if ((fp=fopen(*argv, "r")) != NULL)
                     58:                                process(fp, *argv);
                     59:                        else
                     60:                                warn("%s", *argv);
                     61:                        argv++;
                     62:                }
                     63:        else
                     64:                process(stdin, "<stdin>");
                     65:        exit(0);
                     66: }
                     67:
                     68: void
1.7       deraadt    69: process(FILE *fp, const char *filename)
1.1       deraadt    70: {
1.4       mpech      71:        int offset = 0, c, ret;
1.1       deraadt    72:        int state = 0;
                     73:        char outc;
                     74:
                     75:        while ((c = getc(fp)) != EOF) {
                     76:                offset++;
                     77:        again:
                     78:                switch(ret = unvis(&outc, (char)c, &state, 0)) {
                     79:                case UNVIS_VALID:
                     80:                        putchar(outc);
                     81:                        break;
                     82:                case UNVIS_VALIDPUSH:
                     83:                        putchar(outc);
                     84:                        goto again;
                     85:                case UNVIS_SYNBAD:
                     86:                        warnx("%s: offset: %d: can't decode", filename, offset);
                     87:                        state = 0;
                     88:                        break;
                     89:                case 0:
                     90:                case UNVIS_NOCHAR:
                     91:                        break;
                     92:                default:
                     93:                        errx(1, "bad return value (%d), can't happen", ret);
                     94:                        /* NOTREACHED */
                     95:                }
                     96:        }
                     97:        if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
                     98:                putchar(outc);
                     99: }