[unix-history] / usr / src / usr.bin / vis / vis.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#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[] = "@(#)vis.c	1.2 (Berkeley) 6/29/90";
#endif /* not lint */

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

int eflags, fold, foldwidth=80, none, markeol, debug;

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

	while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF)
		switch((char)ch) {
		case 'n':
			none++;
			break;
		case 'w':
			eflags |= VIS_WHITE;
			break;
		case 'c':
			eflags |= VIS_CSTYLE;
			break;
		case 't':
			eflags |= VIS_TAB;
			break;
		case 's':
			eflags |= VIS_SAFE;
			break;
		case 'o':
			eflags |= VIS_OCTAL;
			break;
		case 'b':
			eflags |= VIS_NOSLASH;
			break;
		case 'F':
			if ((foldwidth = atoi(optarg))<5) {
				fprintf(stderr, 
				 "vis: can't fold lines to less than 5 cols\n");
				exit(1);
			}
			/*FALLTHROUGH*/
		case 'f':
			fold++;		/* fold output lines to 80 cols */
			break;		/* using hidden newline */
		case 'l':
			markeol++;	/* mark end of line with \$ */
			break;
#ifdef DEBUG
		case 'd':
			debug++;
			break;
#endif
		case '?':
		default:
			fprintf(stderr, 
		"usage: vis [-nwctsobf] [-F foldwidth]\n");
			exit(1);
		}
	argc -= optind;
	argv += optind;

	if (*argv)
		while (*argv) {
			if ((fp=fopen(*argv, "r")) != NULL)
				process(fp, *argv);
			else
				fprintf(stderr, "vis: %s: %s\n", *argv,
				    (char *)strerror(errno));
			argv++;
		}
	else
		process(stdin, "<stdin>");
	exit(0);
}
	
process(fp, filename)
	FILE *fp;
	char *filename;
{
	static int col = 0;
	register char *cp = "\0"+1;	/* so *(cp-1) starts out != '\n' */
	register int c, rachar; 
	register char nc;
	char buff[5];
	
	c = getc(fp);
	while (c != EOF) {
		rachar = getc(fp);
		if (none) {
			cp = buff;
			*cp++ = c;
			if (c == '\\')
				*cp++ = '\\';
			*cp = '\0';
		} else if (markeol && c == '\n') {
			cp = buff;
			if ((eflags & VIS_NOSLASH) == 0)
				*cp++ = '\\';
			*cp++ = '$';
			*cp++ = '\n';
			*cp = '\0';
		} else 
			(void) vis(buff, (char)c, eflags, (char)rachar);

		cp = buff;
		if (fold) {
#ifdef DEBUG
			if (debug)
				printf("<%02d,", col);
#endif
			col = foldit(cp, col, foldwidth);
#ifdef DEBUG
			if (debug)
				printf("%02d>", col);
#endif
		}
		do {
			putchar(*cp);
		} while (*++cp);
		c = rachar;
	}
	/*
	 * terminate partial line with a hidden newline
	 */
	if (fold && *(cp-1) != '\n')
		printf("\\\n");
}
Commit	Line	Data
07c06a90 MT	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 are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	16	*/
	17
	18	#ifndef lint
	19	char copyright[] =
	20	"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
	21	All rights reserved.\n";
	22	#endif /* not lint */
	23
	24	#ifndef lint
1c15e888	25	static char sccsid[] = "@(#)vis.c 1.2 (Berkeley) 6/29/90";
07c06a90 MT	26	#endif /* not lint */
	27
	28	#include <stdio.h>
0374ba61	29	#include <vis.h>
07c06a90	30
0374ba61	31	int eflags, fold, foldwidth=80, none, markeol, debug;
07c06a90 MT	32
	33	main(argc, argv)
	34	char *argv[];
	35	{
	36	extern char *optarg;
	37	extern int optind;
	38	extern int errno;
	39	FILE *fp;
	40	int ch;
	41
0374ba61	42	while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF)
07c06a90 MT	43	switch((char)ch) {
	44	case 'n':
	45	none++;
	46	break;
	47	case 'w':
0374ba61	48	eflags \|= VIS_WHITE;
07c06a90 MT	49	break;
07c06a90 MT	50	case 'c':
0374ba61	51	eflags \|= VIS_CSTYLE;
07c06a90	52	break;
0374ba61 MT	53	case 't':
0374ba61 MT	54	eflags \|= VIS_TAB;
07c06a90	55	break;
0374ba61 MT	56	case 's':
0374ba61 MT	57	eflags \|= VIS_SAFE;
07c06a90	58	break;
0374ba61 MT	59	case 'o':
0374ba61 MT	60	eflags \|= VIS_OCTAL;
07c06a90	61	break;
0374ba61 MT	62	case 'b':
0374ba61 MT	63	eflags \|= VIS_NOSLASH;
07c06a90 MT	64	break;
	65	case 'F':
	66	if ((foldwidth = atoi(optarg))<5) {
	67	fprintf(stderr,
0374ba61	68	"vis: can't fold lines to less than 5 cols\n");
07c06a90 MT	69	exit(1);
	70	}
	71	/FALLTHROUGH/
	72	case 'f':
	73	fold++; /* fold output lines to 80 cols */
	74	break; /* using hidden newline */
0374ba61 MT	75	case 'l':
0374ba61 MT	76	markeol++; /* mark end of line with \$ */
07c06a90	77	break;
0374ba61 MT	78	#ifdef DEBUG
	79	case 'd':
	80	debug++;
07c06a90	81	break;
0374ba61	82	#endif
07c06a90 MT	83	case '?':
	84	default:
	85	fprintf(stderr,
0374ba61	86	"usage: vis [-nwctsobf] [-F foldwidth]\n");
07c06a90 MT	87	exit(1);
	88	}
	89	argc -= optind;
	90	argv += optind;
	91
07c06a90 MT	92	if (*argv)
	93	while (*argv) {
	94	if ((fp=fopen(*argv, "r")) != NULL)
	95	process(fp, *argv);
	96	else
	97	fprintf(stderr, "vis: %s: %s\n", *argv,
	98	(char *)strerror(errno));
	99	argv++;
	100	}
	101	else
	102	process(stdin, "<stdin>");
	103	exit(0);
	104	}
	105
	106	process(fp, filename)
	107	FILE *fp;
	108	char *filename;
	109	{
	110	static int col = 0;
0374ba61	111	register char cp = "\0"+1; / so (cp-1) starts out != '\n' /
07c06a90 MT	112	register int c, rachar;
07c06a90 MT	113	register char nc;
0374ba61	114	char buff[5];
07c06a90	115
0374ba61 MT	116	c = getc(fp);
	117	while (c != EOF) {
	118	rachar = getc(fp);
	119	if (none) {
	120	cp = buff;
	121	*cp++ = c;
	122	if (c == '\\')
	123	*cp++ = '\\';
	124	*cp = '\0';
	125	} else if (markeol && c == '\n') {
	126	cp = buff;
	127	if ((eflags & VIS_NOSLASH) == 0)
	128	*cp++ = '\\';
	129	*cp++ = '$';
	130	*cp++ = '\n';
	131	*cp = '\0';
	132	} else
	133	(void) vis(buff, (char)c, eflags, (char)rachar);
	134
	135	cp = buff;
	136	if (fold) {
	137	#ifdef DEBUG
	138	if (debug)
	139	printf("<%02d,", col);
	140	#endif
	141	col = foldit(cp, col, foldwidth);
	142	#ifdef DEBUG
	143	if (debug)
	144	printf("%02d>", col);
	145	#endif
07c06a90	146	}
0374ba61 MT	147	do {
	148	putchar(*cp);
	149	} while (*++cp);
	150	c = rachar;
	151	}
07c06a90	152	/*
0374ba61	153	* terminate partial line with a hidden newline
07c06a90	154	*/
0374ba61 MT	155	if (fold && *(cp-1) != '\n')
0374ba61 MT	156	printf("\\\n");
07c06a90	157	}