[unix-history] / usr.bin / unvis / unvis.c

/*-
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)unvis.c	5.1 (Berkeley) 6/1/90";
#endif /* not lint */

#include <stdio.h>
#include <vis.h>

char	*Program;
#define usage()	fprintf(stderr, "usage: %s %s\n", Program, USAGE)
#define USAGE "[file...]"

main(argc, argv)
	char *argv[];
{
	FILE *fp;
	extern char *optarg;
	extern int optind;
	int ch;

	Program = argv[0];
	while ((ch = getopt(argc, argv, "")) != EOF)
		switch((char)ch) {
		case '?':
		default:
			usage();
			exit(1);
		}
	argc -= optind;
	argv += optind;

	if (*argv)
		while (*argv) {
			if ((fp=fopen(*argv, "r")) != NULL)
				process(fp, *argv);
			else
				syserror("%s", *argv);
			argv++;
		}
	else
		process(stdin, "<stdin>");
	exit(0);
}

process(fp, filename)
	FILE *fp;
	char *filename;
{
	register int offset = 0, c, ret;
	int state = 0;
	char outc;

	while ((c = getc(fp)) != EOF) {
		offset++;
	again:
		switch(ret = unvis(&outc, (char)c, &state, 0)) {
		case UNVIS_VALID:
			putchar(outc);
			break;
		case UNVIS_VALIDPUSH:
			putchar(outc);
			goto again;
		case UNVIS_SYNBAD:
			error("%s: offset: %d: can't decode", filename, offset);
			state = 0;
			break;
		case 0:
		case UNVIS_NOCHAR:
			break;
		default:
			error("bad return value (%d), can't happen", ret);
			exit(1);
		}
	}
	if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
		putchar(outc);
}

#include <varargs.h>

error(va_alist)
	va_dcl
{
	char *fmt;
	va_list ap;
	extern errno;

	fprintf(stderr, "%s: ", Program);
	va_start(ap);
	fmt = va_arg(ap, char *);
	(void) vfprintf(stderr, fmt, ap);
	va_end(ap);
	fprintf(stderr, "\n");
}

syserror(va_alist)
	va_dcl
{
	char *fmt;
	va_list ap;
	extern errno;

	fprintf(stderr, "%s: ", Program);
	va_start(ap);
	fmt = va_arg(ap, char *);
	(void) vfprintf(stderr, fmt, ap);
	va_end(ap);
	fprintf(stderr, ": %s\n", strerror(errno));
}
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	char copyright[] =
	36	"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
	37	All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	static char sccsid[] = "@(#)unvis.c 5.1 (Berkeley) 6/1/90";
	42	#endif /* not lint */
	43
	44	#include <stdio.h>
	45	#include <vis.h>
	46
	47	char *Program;
	48	#define usage() fprintf(stderr, "usage: %s %s\n", Program, USAGE)
	49	#define USAGE "[file...]"
	50
	51	main(argc, argv)
	52	char *argv[];
	53	{
	54	FILE *fp;
	55	extern char *optarg;
	56	extern int optind;
	57	int ch;
	58
	59	Program = argv[0];
	60	while ((ch = getopt(argc, argv, "")) != EOF)
	61	switch((char)ch) {
	62	case '?':
	63	default:
	64	usage();
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	syserror("%s", *argv);
76	argv++;
77	}
78	else
79	process(stdin, "<stdin>");
80	exit(0);
81	}
82
83	process(fp, filename)
84	FILE *fp;
85	char *filename;
86	{
87	register int offset = 0, c, ret;
88	int state = 0;
89	char outc;
90
91	while ((c = getc(fp)) != EOF) {
92	offset++;
93	again:
94	switch(ret = unvis(&outc, (char)c, &state, 0)) {
95	case UNVIS_VALID:
96	putchar(outc);
97	break;
98	case UNVIS_VALIDPUSH:
99	putchar(outc);
100	goto again;
101	case UNVIS_SYNBAD:
102	error("%s: offset: %d: can't decode", filename, offset);
103	state = 0;
104	break;
105	case 0:
106	case UNVIS_NOCHAR:
107	break;
108	default:
109	error("bad return value (%d), can't happen", ret);
110	exit(1);
111	}
112	}
113	if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
114	putchar(outc);
115	}
116
117	#include <varargs.h>
118
119	error(va_alist)
120	va_dcl
121	{
122	char *fmt;
123	va_list ap;
124	extern errno;
125
126	fprintf(stderr, "%s: ", Program);
127	va_start(ap);
128	fmt = va_arg(ap, char *);
129	(void) vfprintf(stderr, fmt, ap);
130	va_end(ap);
131	fprintf(stderr, "\n");
132	}
133
134	syserror(va_alist)
135	va_dcl
136	{
137	char *fmt;
138	va_list ap;
139	extern errno;
140
141	fprintf(stderr, "%s: ", Program);
142	va_start(ap);
143	fmt = va_arg(ap, char *);
144	(void) vfprintf(stderr, fmt, ap);
145	va_end(ap);
146	fprintf(stderr, ": %s\n", strerror(errno));
147	}