jot.c revision 77287 
1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  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
35static const char copyright[] =
36"@(#) Copyright (c) 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)jot.c	8.1 (Berkeley) 6/6/93";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/usr.bin/jot/jot.c 77287 2001-05-28 00:55:50Z dd $";
46#endif /* not lint */
47
48/*
49 * jot - print sequential or random data
50 *
51 * Author:  John Kunze, Office of Comp. Affairs, UCB
52 */
53
54#include <ctype.h>
55#include <err.h>
56#include <limits.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <time.h>
61#include <unistd.h>
62
63#define	REPS_DEF	100
64#define	BEGIN_DEF	1
65#define	ENDER_DEF	100
66#define	STEP_DEF	1
67
68#define	is_default(s)	(strcmp((s), "-") == 0)
69
70double	begin;
71double	ender;
72double	s;
73long	reps;
74int	randomize;
75int	infinity;
76int	boring;
77int	prec;
78int	longdata;
79int	intdata;
80int	chardata;
81int	nosign;
82int	nofinalnl;
83const	char *sepstring = "\n";
84char	format[BUFSIZ];
85
86int		main __P((int, char *[]));
87void		getformat __P((void));
88int		getprec __P((char *));
89int		putdata __P((double, long));
90static void	usage __P((void));
91
92int
93main(argc, argv)
94	int argc;
95	char *argv[];
96{
97	double	xd, yd;
98	long	id;
99	double	*x = &xd;
100	double	*y = &yd;
101	long	*i = &id;
102	unsigned int	mask = 0;
103	int	n = 0;
104	int	ch;
105
106	while ((ch = getopt(argc, argv, "rb:w:cs:np:")) != -1)
107		switch ((char)ch) {
108		case 'r':
109			randomize = 1;
110			break;
111		case 'c':
112			chardata = 1;
113			break;
114		case 'n':
115			nofinalnl = 1;
116			break;
117		case 'b':
118			boring = 1;
119			/* FALLTHROUGH */
120		case 'w':
121			if (strlcpy(format, optarg, sizeof(format)) >=
122			    sizeof(format))
123				errx(1, "-%c word too long", ch);
124			break;
125		case 's':
126			sepstring = optarg;
127			break;
128		case 'p':
129			prec = atoi(optarg);
130			if (prec <= 0)
131				errx(1, "bad precision value");
132			break;
133		default:
134			usage();
135		}
136	argc -= optind;
137	argv += optind;
138
139	switch (argc) {	/* examine args right to left, falling thru cases */
140	case 4:
141		if (!is_default(argv[3])) {
142			if (!sscanf(argv[3], "%lf", &s))
143				errx(1, "bad s value: %s", argv[3]);
144			mask |= 01;
145		}
146	case 3:
147		if (!is_default(argv[2])) {
148			if (!sscanf(argv[2], "%lf", &ender))
149				ender = argv[2][strlen(argv[2])-1];
150			mask |= 02;
151			if (!prec)
152				n = getprec(argv[2]);
153		}
154	case 2:
155		if (!is_default(argv[1])) {
156			if (!sscanf(argv[1], "%lf", &begin))
157				begin = argv[1][strlen(argv[1])-1];
158			mask |= 04;
159			if (!prec)
160				prec = getprec(argv[1]);
161			if (n > prec)		/* maximum precision */
162				prec = n;
163		}
164	case 1:
165		if (!is_default(argv[0])) {
166			if (!sscanf(argv[0], "%ld", &reps))
167				errx(1, "bad reps value: %s", argv[0]);
168			mask |= 010;
169		}
170		break;
171	case 0:
172		usage();
173	default:
174		errx(1, "too many arguments.  What do you mean by %s?",
175		    argv[4]);
176	}
177	getformat();
178	while (mask)	/* 4 bit mask has 1's where last 4 args were given */
179		switch (mask) {	/* fill in the 0's by default or computation */
180		case 001:
181			reps = REPS_DEF;
182			mask = 011;
183			break;
184		case 002:
185			reps = REPS_DEF;
186			mask = 012;
187			break;
188		case 003:
189			reps = REPS_DEF;
190			mask = 013;
191			break;
192		case 004:
193			reps = REPS_DEF;
194			mask = 014;
195			break;
196		case 005:
197			reps = REPS_DEF;
198			mask = 015;
199			break;
200		case 006:
201			reps = REPS_DEF;
202			mask = 016;
203			break;
204		case 007:
205			if (randomize) {
206				reps = REPS_DEF;
207				mask = 0;
208				break;
209			}
210			if (s == 0.0) {
211				reps = 0;
212				mask = 0;
213				break;
214			}
215			reps = (ender - begin + s) / s;
216			if (reps <= 0)
217				errx(1, "impossible stepsize");
218			mask = 0;
219			break;
220		case 010:
221			begin = BEGIN_DEF;
222			mask = 014;
223			break;
224		case 011:
225			begin = BEGIN_DEF;
226			mask = 015;
227			break;
228		case 012:
229			s = (randomize ? time(NULL) : STEP_DEF);
230			mask = 013;
231			break;
232		case 013:
233			if (randomize)
234				begin = BEGIN_DEF;
235			else if (reps == 0)
236				errx(1, "must specify begin if reps == 0");
237			begin = ender - reps * s + s;
238			mask = 0;
239			break;
240		case 014:
241			s = (randomize ? -1.0 : STEP_DEF);
242			mask = 015;
243			break;
244		case 015:
245			if (randomize)
246				ender = ENDER_DEF;
247			else
248				ender = begin + reps * s - s;
249			mask = 0;
250			break;
251		case 016:
252			if (randomize)
253				s = -1.0;
254			else if (reps == 0)
255				errx(1, "infinite sequences cannot be bounded");
256			else if (reps == 1)
257				s = 0.0;
258			else
259				s = (ender - begin) / (reps - 1);
260			mask = 0;
261			break;
262		case 017:		/* if reps given and implied, */
263			if (!randomize && s != 0.0) {
264				long t = (ender - begin + s) / s;
265				if (t <= 0)
266					errx(1, "impossible stepsize");
267				if (t < reps)		/* take lesser */
268					reps = t;
269			}
270			mask = 0;
271			break;
272		default:
273			errx(1, "bad mask");
274		}
275	if (reps == 0)
276		infinity = 1;
277	if (randomize) {
278		*x = (ender - begin) * (ender > begin ? 1 : -1);
279		for (*i = 1; *i <= reps || infinity; (*i)++) {
280			*y = arc4random() / ULONG_MAX;
281			if (putdata(*y * *x + begin, reps - *i))
282				errx(1, "range error in conversion");
283		}
284	} else
285		for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
286			if (putdata(*x, reps - *i))
287				errx(1, "range error in conversion");
288	if (!nofinalnl)
289		putchar('\n');
290	exit(0);
291}
292
293int
294putdata(x, notlast)
295	double x;
296	long notlast;
297{
298
299	if (boring)
300		printf("%s", format);
301	else if (longdata && nosign) {
302		if (x <= (double)ULONG_MAX && x >= (double)0)
303			printf(format, (unsigned long)x);
304		else
305			return (1);
306	} else if (longdata) {
307		if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
308			printf(format, (long)x);
309		else
310			return (1);
311	} else if (chardata || (intdata && !nosign)) {
312		if (x <= (double)INT_MAX && x >= (double)INT_MIN)
313			printf(format, (int)x);
314		else
315			return (1);
316	} else if (intdata) {
317		if (x <= (double)UINT_MAX && x >= (double)0)
318			printf(format, (unsigned int)x);
319		else
320			return (1);
321
322	} else
323		printf(format, x);
324	if (notlast != 0)
325		fputs(sepstring, stdout);
326
327	return (0);
328}
329
330static void
331usage()
332{
333	fprintf(stderr, "%s\n%s\n",
334	"usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
335	"           [reps [begin [end [s]]]]");
336	exit(1);
337}
338
339int
340getprec(str)
341	char *str;
342{
343	char	*p;
344	char	*q;
345
346	for (p = str; *p; p++)
347		if (*p == '.')
348			break;
349	if (!*p)
350		return (0);
351	for (q = ++p; *p; p++)
352		if (!isdigit(*p))
353			break;
354	return (p - q);
355}
356
357void
358getformat()
359{
360	char	*p, *p2;
361	int dot, hash, space, sign, numbers = 0;
362	size_t sz;
363
364	if (boring)				/* no need to bother */
365		return;
366	for (p = format; *p; p++)		/* look for '%' */
367		if (*p == '%' && *(p+1) != '%')	/* leave %% alone */
368			break;
369	sz = sizeof(format) - strlen(format) - 1;
370	if (!*p && !chardata) {
371		if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
372			errx(1, "-w word too long");
373	} else if (!*p && chardata) {
374		if (strlcpy(p, "%c", sz) >= sz)
375			errx(1, "-w word too long");
376		intdata = 1;
377	} else if (!*(p+1)) {
378		if (sz <= 0)
379			errx(1, "-w word too long");
380		strcat(format, "%");		/* cannot end in single '%' */
381	} else {
382		/*
383		 * Allow conversion format specifiers of the form
384		 * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
385		 * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
386		 */
387		p2 = p++;
388		dot = hash = space = sign = numbers = 0;
389		while (!isalpha(*p)) {
390			if (isdigit(*p)) {
391				numbers++;
392				p++;
393			} else if ((*p == '#' && !(numbers|dot|sign|space|
394			    hash++)) ||
395			    (*p == ' ' && !(numbers|dot|space++)) ||
396			    ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
397			    || (*p == '.' && !(dot++)))
398				p++;
399			else
400				goto fmt_broken;
401		}
402		if (*p == 'l') {
403			longdata = 1;
404			if (*++p == 'l') {
405				if (p[1] != '\0')
406					p++;
407				goto fmt_broken;
408			}
409		}
410		switch (*p) {
411		case 'o': case 'u': case 'x': case 'X':
412			intdata = nosign = 1;
413			break;
414		case 'd': case 'i':
415			intdata = 1;
416			break;
417		case 'D':
418			if (!longdata) {
419				intdata = 1;
420				break;
421			}
422		case 'O': case 'U':
423			if (!longdata) {
424				intdata = nosign = 1;
425				break;
426			}
427		case 'c':
428			if (!(intdata | longdata)) {
429				chardata = 1;
430				break;
431			}
432		case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
433		case '$': case '*':
434			goto fmt_broken;
435		case 'f': case 'e': case 'g': case 'E': case 'G':
436			if (!longdata)
437				break;
438			/* FALLTHROUGH */
439		default:
440fmt_broken:
441			*++p = '\0';
442			errx(1, "illegal or unsupported format '%s'", p2);
443			/* NOTREACHED */
444		}
445		while (*++p)
446			if (*p == '%' && *(p+1) && *(p+1) != '%')
447				errx(1, "too many conversions");
448			else if (*p == '%' && *(p+1) == '%')
449				p++;
450			else if (*p == '%' && !*(p+1)) {
451				strcat(format, "%");
452				break;
453			}
454	}
455}
456