1 /* $OpenBSD: jot.c,v 1.56 2021/08/13 12:37:28 jmc Exp $ */
2 /* $NetBSD: jot.c,v 1.3 1994/12/02 20:29:43 pk Exp $ */
3
4 /*-
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * jot - print sequential or random data
35 *
36 * Author: John Kunze, Office of Comp. Affairs, UCB
37 */
38
39 #include <ctype.h>
40 #include <err.h>
41 #include <limits.h>
42 #include <math.h>
43 #include <stdbool.h>
44 #include <stdint.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49
50 #define REPS 1
51 #define BEGIN 2
52 #define ENDER 4
53 #define STEP 8
54
55 #define is_default(s) (strcmp((s), "-") == 0)
56
57 static long reps = 100;
58 static double begin = 1;
59 static double ender = 100;
60 static double step = 1;
61
62 static char *format = "";
63 static char *sepstring = "\n";
64 static int prec = -1;
65 static bool boring;
66 static bool chardata;
67 static bool finalnl = true;
68 static bool infinity;
69 static bool intdata;
70 static bool longdata;
71 static bool nosign;
72 static bool randomize;
73 static bool word;
74
75 static void getformat(void);
76 static int getprec(char *);
77 static int putdata(double, bool);
78 static void __dead usage(void);
79
80 int
main(int argc,char * argv[])81 main(int argc, char *argv[])
82 {
83 double x;
84 double y;
85 long i;
86 unsigned int mask = 0;
87 int n = 0;
88 int ch;
89 const char *errstr;
90
91 if (pledge("stdio", NULL) == -1)
92 err(1, "pledge");
93
94 while ((ch = getopt(argc, argv, "b:cnp:rs:w:")) != -1) {
95 switch (ch) {
96 case 'b':
97 boring = true;
98 chardata = word = false;
99 format = optarg;
100 break;
101 case 'c':
102 chardata = true;
103 boring = word = false;
104 format = "";
105 break;
106 case 'n':
107 finalnl = false;
108 break;
109 case 'p':
110 prec = strtonum(optarg, 0, INT_MAX, &errstr);
111 if (errstr != NULL)
112 errx(1, "bad precision value, %s: %s", errstr,
113 optarg);
114 break;
115 case 'r':
116 randomize = true;
117 break;
118 case 's':
119 sepstring = optarg;
120 break;
121 case 'w':
122 word = true;
123 boring = chardata = false;
124 format = optarg;
125 break;
126 default:
127 usage();
128 }
129 }
130 argc -= optind;
131 argv += optind;
132
133 switch (argc) { /* examine args right to left, falling thru cases */
134 case 4:
135 if (!is_default(argv[3])) {
136 if (!sscanf(argv[3], "%lf", &step))
137 errx(1, "Bad s value: %s", argv[3]);
138 mask |= STEP;
139 if (randomize)
140 warnx("random seeding not supported");
141 }
142 case 3:
143 if (!is_default(argv[2])) {
144 if (!sscanf(argv[2], "%lf", &ender))
145 ender = argv[2][strlen(argv[2])-1];
146 mask |= ENDER;
147 if (prec == -1)
148 n = getprec(argv[2]);
149 }
150 case 2:
151 if (!is_default(argv[1])) {
152 if (!sscanf(argv[1], "%lf", &begin))
153 begin = argv[1][strlen(argv[1])-1];
154 mask |= BEGIN;
155 if (prec == -1)
156 prec = getprec(argv[1]);
157 if (n > prec) /* maximum precision */
158 prec = n;
159 }
160 case 1:
161 if (!is_default(argv[0])) {
162 reps = strtonum(argv[0], 0, LONG_MAX, &errstr);
163 if (errstr != NULL)
164 errx(1, "Bad reps value, %s: %s", errstr,
165 argv[0]);
166 mask |= REPS;
167 if (reps == 0)
168 infinity = true;
169 }
170 case 0:
171 if (prec == -1)
172 prec = 0;
173 break;
174 default:
175 errx(1, "Too many arguments. What do you mean by %s?",
176 argv[4]);
177 }
178
179 if (!boring)
180 getformat();
181
182 if (!randomize) {
183 /*
184 * Consolidate the values of reps, begin, ender, step:
185 * The formula ender - begin == (reps - 1) * step shows that any
186 * three determine the fourth (unless reps == 1 or step == 0).
187 * The manual states the following rules:
188 * 1. If four are specified, compare the given and the computed
189 * value of reps and take the smaller of the two.
190 * 2. If steps was omitted, it takes the default, unless both
191 * begin and ender were specified.
192 * 3. Assign defaults to omitted values for reps, begin, ender,
193 * from left to right.
194 */
195 switch (mask) { /* Four cases involve both begin and ender. */
196 case REPS | BEGIN | ENDER | STEP:
197 if (infinity)
198 errx(1,
199 "Can't specify end of infinite sequence");
200 if (step != 0.0) {
201 long t = (ender - begin + step) / step;
202 if (t <= 0)
203 errx(1, "Impossible stepsize");
204 if (t < reps)
205 reps = t;
206 }
207 break;
208 case REPS | BEGIN | ENDER:
209 if (infinity)
210 errx(1,
211 "Can't specify end of infinite sequence");
212 if (reps == 1)
213 step = 0.0;
214 else
215 step = (ender - begin) / (reps - 1);
216 break;
217 case BEGIN | ENDER:
218 step = ender > begin ? 1 : -1; /* FreeBSD's behavior. */
219 /* FALLTHROUGH */
220 case BEGIN | ENDER | STEP:
221 if (step == 0.0) {
222 reps = 0;
223 infinity = true;
224 break;
225 }
226 reps = (ender - begin + step) / step;
227 if (reps <= 0)
228 errx(1, "Impossible stepsize");
229 break;
230 case ENDER: /* Four cases involve only ender. */
231 case ENDER | STEP:
232 case REPS | ENDER:
233 case REPS | ENDER | STEP:
234 if (infinity)
235 errx(1,
236 "Must specify start of infinite sequence");
237 begin = ender - reps * step + step;
238 break;
239 default:
240 /*
241 * The remaining eight cases omit ender. We don't need
242 * to compute anything because only reps, begin, step
243 * are used for producing output below. Rules 2. and 3.
244 * together imply that ender will be set last.
245 */
246 break;
247 }
248
249 for (i = 1, x = begin; i <= reps || infinity; i++, x += step)
250 if (putdata(x, reps == i && !infinity))
251 errx(1, "range error in conversion: %f", x);
252 } else { /* Random output: use defaults for omitted values. */
253 bool use_unif = 0;
254 uint32_t pow10 = 1;
255 uint32_t uintx = 0; /* Initialized to make gcc happy. */
256
257 if (prec > 9) /* pow(10, prec) > UINT32_MAX */
258 errx(1, "requested precision too large");
259
260 if (ender < begin) {
261 x = begin;
262 begin = ender;
263 ender = x;
264 }
265 x = ender - begin;
266
267 if (prec > 0 || (fmod(ender, 1) == 0 && fmod(begin, 1) == 0)) {
268 double range;
269
270 while (prec-- > 0)
271 pow10 *= 10;
272
273 range = pow10 * (ender - begin);
274
275 /* If range is an integer, use arc4random_uniform(). */
276 if (fmod(range, 1) == 0) {
277 if (range >= UINT32_MAX)
278 errx(1, "requested range too large");
279 use_unif = 1;
280 uintx = range + 1;
281 }
282 }
283
284 for (i = 1; i <= reps || infinity; i++) {
285 double v;
286
287 if (use_unif) {
288 y = arc4random_uniform(uintx) / (double)pow10;
289 v = y + begin;
290 } else {
291 y = arc4random() / ((double)0xffffffff + 1);
292 v = y * x + begin;
293 }
294 if (putdata(v, reps == i && !infinity))
295 errx(1, "range error in conversion: %f", v);
296 }
297 }
298
299 if (finalnl)
300 putchar('\n');
301
302 return 0;
303 }
304
305 static int
putdata(double x,bool last)306 putdata(double x, bool last)
307 {
308 if (boring)
309 printf("%s", format);
310 else if (longdata && nosign) {
311 if (x < 0.0 || x > (double)ULONG_MAX)
312 return 1;
313 printf(format, (unsigned long)x);
314 } else if (longdata) {
315 if (x < (double)LONG_MIN || x > (double)LONG_MAX)
316 return 1;
317 printf(format, (long)x);
318 } else if (chardata || (intdata && !nosign)) {
319 if (x < (double)INT_MIN || x > (double)INT_MAX)
320 return 1;
321 printf(format, (int)x);
322 } else if (intdata) {
323 if (x < 0.0 || x > (double)UINT_MAX)
324 return 1;
325 printf(format, (unsigned int)x);
326 } else
327 printf(format, x);
328 if (!last)
329 fputs(sepstring, stdout);
330
331 return 0;
332 }
333
334 static void __dead
usage(void)335 usage(void)
336 {
337 (void)fprintf(stderr, "usage: jot [-cnr] [-b word] [-p precision] "
338 "[-s string] [-w word]\n"
339 " [reps [begin [end [step]]]]\n");
340 exit(1);
341 }
342
343 static int
getprec(char * s)344 getprec(char *s)
345 {
346 if ((s = strchr(s, '.')) == NULL)
347 return 0;
348 return strspn(s + 1, "0123456789");
349 }
350
351 static void
getformat(void)352 getformat(void)
353 {
354 char *p;
355
356 p = format;
357 while ((p = strchr(p, '%')) != NULL && p[1] == '%')
358 p += 2;
359
360 if (p == NULL && !chardata) {
361 if (asprintf(&format, "%s%%.%df", format, prec) == -1)
362 err(1, NULL);
363 } else if (p == NULL && chardata) {
364 if (asprintf(&format, "%s%%c", format) == -1)
365 err(1, NULL);
366 } else if (p[1] == '\0') {
367 /* cannot end in single '%' */
368 if (asprintf(&format, "%s%%", format) == -1)
369 err(1, NULL);
370 } else {
371 /*
372 * Allow conversion format specifiers of the form
373 * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
374 * [l]{d,i,o,u,x} or {f,e,g,F,E,G,d,o,x,D,O,U,X,c,u}
375 */
376 char *fmt;
377 int dot, hash, space, sign, numbers;
378
379 fmt = p++;
380 dot = hash = space = sign = numbers = 0;
381 while (!isalpha((unsigned char)*p)) {
382 if (isdigit((unsigned char)*p)) {
383 numbers++;
384 p++;
385 } else if ((*p == '#' && !(numbers|dot|sign|space|
386 hash++)) ||
387 (*p == ' ' && !(numbers|dot|space++)) ||
388 ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
389 || (*p == '.' && !(dot++)))
390 p++;
391 else
392 goto fmt_broken;
393 }
394 if (*p == 'l') {
395 longdata = true;
396 if (*++p == 'l') {
397 p++;
398 goto fmt_broken;
399 }
400 }
401 switch (*p) {
402 case 'd':
403 case 'i':
404 intdata = true;
405 break;
406 case 'o':
407 case 'u':
408 case 'x':
409 case 'X':
410 intdata = nosign = true;
411 break;
412 case 'D':
413 if (longdata)
414 goto fmt_broken;
415 longdata = intdata = true; /* same as %ld */
416 break;
417 case 'O':
418 case 'U':
419 if (longdata)
420 goto fmt_broken;
421 longdata = intdata = nosign = true; /* same as %l[ou] */
422 break;
423 case 'c':
424 if (longdata)
425 goto fmt_broken;
426 chardata = true;
427 break;
428 case 'e':
429 case 'E':
430 case 'f':
431 case 'F':
432 case 'g':
433 case 'G':
434 if (longdata)
435 goto fmt_broken;
436 /* No cast needed for printing in putdata() */
437 break;
438 default:
439 fmt_broken:
440 errx(1, "illegal or unsupported format '%.*s'",
441 (int)(p + 1 - fmt), fmt);
442 }
443
444 while ((p = strchr(p, '%')) != NULL && p[1] == '%')
445 p += 2;
446
447 if (p != NULL) {
448 if (p[1] != '\0')
449 errx(1, "too many conversions");
450 /* cannot end in single '%' */
451 if (asprintf(&format, "%s%%", format) == -1)
452 err(1, NULL);
453 }
454 }
455 }
456