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

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38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)jot.c 8.1 (Berkeley) 6/6/93";
43#endif
44#endif
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: head/usr.bin/jot/jot.c 164021 2006-11-06 07:26:16Z dds $");
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>

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61#include <time.h>
62#include <unistd.h>
63
64#define REPS_DEF 100
65#define BEGIN_DEF 1
66#define ENDER_DEF 100
67#define STEP_DEF 1
68
69#define HAVE_STEP 1
70#define HAVE_ENDER 2
71#define HAVE_BEGIN 4
72#define HAVE_REPS 8
73
74#define is_default(s) (strcmp((s), "-") == 0)
75
76double begin;
77double ender;
78double s;
79long reps;
80int randomize;
81int infinity;

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139 argc -= optind;
140 argv += optind;
141
142 switch (argc) { /* examine args right to left, falling thru cases */
143 case 4:
144 if (!is_default(argv[3])) {
145 if (!sscanf(argv[3], "%lf", &s))
146 errx(1, "bad s value: %s", argv[3]);
147 mask |= HAVE_STEP;
148 }
149 /* FALLTHROUGH */
150 case 3:
151 if (!is_default(argv[2])) {
152 if (!sscanf(argv[2], "%lf", &ender))
153 ender = argv[2][strlen(argv[2])-1];
154 mask |= HAVE_ENDER;
155 if (!prec)
156 n = getprec(argv[2]);
157 }
158 /* FALLTHROUGH */
159 case 2:
160 if (!is_default(argv[1])) {
161 if (!sscanf(argv[1], "%lf", &begin))
162 begin = argv[1][strlen(argv[1])-1];
163 mask |= HAVE_BEGIN;
164 if (!prec)
165 prec = getprec(argv[1]);
166 if (n > prec) /* maximum precision */
167 prec = n;
168 }
169 /* FALLTHROUGH */
170 case 1:
171 if (!is_default(argv[0])) {
172 if (!sscanf(argv[0], "%ld", &reps))
173 errx(1, "bad reps value: %s", argv[0]);
174 mask |= HAVE_REPS;
175 }
176 break;
177 case 0:
178 usage();
179 default:
180 errx(1, "too many arguments. What do you mean by %s?",
181 argv[4]);
182 }
183 getformat();
184 while (mask) /* 4 bit mask has 1's where last 4 args were given */
185 switch (mask) { /* fill in the 0's by default or computation */
186 case HAVE_STEP:
187 reps = REPS_DEF;
188 mask = HAVE_REPS | HAVE_STEP;
189 break;
190 case HAVE_ENDER:
191 reps = REPS_DEF;
192 mask = HAVE_REPS | HAVE_ENDER;
193 break;
194 case HAVE_ENDER | HAVE_STEP:
195 reps = REPS_DEF;
196 mask = HAVE_REPS | HAVE_ENDER | HAVE_STEP;
197 break;
198 case HAVE_BEGIN:
199 reps = REPS_DEF;
200 mask = HAVE_REPS | HAVE_BEGIN;
201 break;
202 case HAVE_BEGIN | HAVE_STEP:
203 reps = REPS_DEF;
204 mask = HAVE_REPS | HAVE_BEGIN | HAVE_STEP;
205 break;
206 case HAVE_BEGIN | HAVE_ENDER:
207 reps = REPS_DEF;
208 mask = HAVE_REPS | HAVE_BEGIN | HAVE_ENDER;
209 break;
210 case HAVE_BEGIN | HAVE_ENDER | HAVE_STEP:
211 if (randomize) {
212 reps = REPS_DEF;
213 mask = 0;
214 break;
215 }
216 if (s == 0.0) {
217 reps = 0;
218 mask = 0;
219 break;
220 }
221 reps = (ender - begin + s) / s;
222 if (reps <= 0)
223 errx(1, "impossible stepsize");
224 mask = 0;
225 break;
226 case HAVE_REPS:
227 begin = BEGIN_DEF;
228 mask = HAVE_REPS | HAVE_BEGIN;
229 break;
230 case HAVE_REPS | HAVE_STEP:
231 begin = BEGIN_DEF;
232 mask = HAVE_REPS | HAVE_BEGIN | HAVE_STEP;
233 break;
234 case HAVE_REPS | HAVE_ENDER:
235 s = (randomize ? time(NULL) : STEP_DEF);
236 mask = HAVE_REPS | HAVE_ENDER | HAVE_STEP;
237 break;
238 case HAVE_REPS | HAVE_ENDER | HAVE_STEP:
239 if (randomize)
240 begin = BEGIN_DEF;
241 else if (reps == 0)
242 errx(1, "must specify begin if reps == 0");
243 begin = ender - reps * s + s;
244 mask = 0;
245 break;
246 case HAVE_REPS | HAVE_BEGIN:
247 s = (randomize ? -1.0 : STEP_DEF);
248 mask = HAVE_REPS | HAVE_BEGIN | HAVE_STEP;
249 break;
250 case HAVE_REPS | HAVE_BEGIN | HAVE_STEP:
251 if (randomize)
252 ender = ENDER_DEF;
253 else
254 ender = begin + reps * s - s;
255 mask = 0;
256 break;
257 case HAVE_REPS | HAVE_BEGIN | HAVE_ENDER:
258 if (randomize)
259 s = -1.0;
260 else if (reps == 0)
261 errx(1, "infinite sequences cannot be bounded");
262 else if (reps == 1)
263 s = 0.0;
264 else
265 s = (ender - begin) / (reps - 1);
266 mask = 0;
267 break;
268 case HAVE_REPS | HAVE_BEGIN | HAVE_ENDER | HAVE_STEP:
269 /* if reps given and implied, */
270 if (!randomize && s != 0.0) {
271 long t = (ender - begin + s) / s;
272 if (t <= 0)
273 errx(1, "impossible stepsize");
274 if (t < reps) /* take lesser */
275 reps = t;
276 }
277 mask = 0;

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