472 lines
10 KiB
C
472 lines
10 KiB
C
/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)jot.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* jot - print sequential or random data
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*
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* Author: John Kunze, Office of Comp. Affairs, UCB
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*/
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#include <ctype.h>
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#include <err.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#define REPS_DEF 100
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#define BEGIN_DEF 1
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#define ENDER_DEF 100
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#define STEP_DEF 1
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#define isdefault(s) (strcmp((s), "-") == 0)
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double begin;
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double ender;
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double s;
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long reps;
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int randomize;
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int infinity;
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int boring;
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int prec;
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int intdata;
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int chardata;
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int nosign;
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int nofinalnl;
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int oflowlen;
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char *oflowstr;
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char *sepstring = "\n";
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char format[BUFSIZ];
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struct sigaction act, oact;
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void arith_oflow __P((int));
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void getargs __P((int, char *[]));
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void getformat __P((void));
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int getprec __P((char *));
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void putdata __P((double, long));
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static void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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double xd, yd;
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long id;
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register double *x = &xd;
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register double *y = &yd;
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register long *i = &id;
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act.sa_handler = arith_oflow;
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act.sa_flags = 0;
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sigfillset(&act.sa_mask);
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oflowstr = "caught SIGFPE: arithmetic overflow\n";
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oflowlen = strlen(oflowstr);
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if (sigaction(SIGFPE, &act, &oact))
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err(1, "loading SIGFPE handler");
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getargs(argc, argv);
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if (randomize) {
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*x = (ender - begin) * (ender > begin ? 1 : -1);
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for (*i = 1; *i <= reps || infinity; (*i)++) {
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*y = (double) arc4random() / ULONG_MAX;
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putdata(*y * *x + begin, reps - *i);
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}
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} else
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for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
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putdata(*x, reps - *i);
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if (!nofinalnl)
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putchar('\n');
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exit(0);
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}
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void
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getargs(ac, av)
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int ac;
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char *av[];
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{
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register unsigned int mask = 0;
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register int n = 0;
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while (--ac && **++av == '-' && !isdefault(*av))
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switch ((*av)[1]) {
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case 'r':
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randomize = 1;
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break;
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case 'c':
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chardata = 1;
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break;
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case 'n':
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nofinalnl = 1;
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break;
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case 'b':
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boring = 1;
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case 'w':
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if ((*av)[2])
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strcpy(format, *av + 2);
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else if (!--ac)
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errx(1, "need context word after -w or -b");
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else
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strcpy(format, *++av);
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break;
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case 's':
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if ((*av)[2])
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sepstring = *av + 2;
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else if (!--ac)
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errx(1, "need string after -s");
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else
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sepstring = *++av;
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break;
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case 'p':
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if ((*av)[2])
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prec = atoi(*av + 2);
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else if (!--ac)
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errx(1, "need number after -p");
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else
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prec = atoi(*++av);
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if (prec <= 0)
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errx(1, "bad precision value");
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break;
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default:
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usage();
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}
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switch (ac) { /* examine args right to left, falling thru cases */
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case 4:
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if (!isdefault(av[3])) {
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if (!sscanf(av[3], "%lf", &s))
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errx(1, "bad s value: %s", av[3]);
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mask |= 01;
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}
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case 3:
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if (!isdefault(av[2])) {
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if (!sscanf(av[2], "%lf", &ender))
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ender = av[2][strlen(av[2])-1];
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mask |= 02;
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if (!prec)
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n = getprec(av[2]);
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}
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case 2:
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if (!isdefault(av[1])) {
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if (!sscanf(av[1], "%lf", &begin))
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begin = av[1][strlen(av[1])-1];
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mask |= 04;
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if (!prec)
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prec = getprec(av[1]);
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if (n > prec) /* maximum precision */
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prec = n;
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}
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case 1:
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if (!isdefault(av[0])) {
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if (!sscanf(av[0], "%ld", &reps))
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errx(1, "bad reps value: %s", av[0]);
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mask |= 010;
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}
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break;
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case 0:
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usage();
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default:
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errx(1, "too many arguments. What do you mean by %s?", av[4]);
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}
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getformat();
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while (mask) /* 4 bit mask has 1's where last 4 args were given */
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switch (mask) { /* fill in the 0's by default or computation */
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case 001:
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reps = REPS_DEF;
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mask = 011;
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break;
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case 002:
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reps = REPS_DEF;
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mask = 012;
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break;
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case 003:
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reps = REPS_DEF;
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mask = 013;
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break;
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case 004:
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reps = REPS_DEF;
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mask = 014;
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break;
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case 005:
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reps = REPS_DEF;
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mask = 015;
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break;
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case 006:
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reps = REPS_DEF;
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mask = 016;
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break;
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case 007:
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if (randomize) {
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reps = REPS_DEF;
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mask = 0;
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break;
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}
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if (s == 0.0) {
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reps = 0;
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mask = 0;
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break;
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}
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reps = (ender - begin + s) / s;
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if (reps <= 0)
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errx(1, "impossible stepsize");
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mask = 0;
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break;
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case 010:
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begin = BEGIN_DEF;
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mask = 014;
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break;
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case 011:
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begin = BEGIN_DEF;
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mask = 015;
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break;
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case 012:
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s = (randomize ? -1.0 : STEP_DEF);
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mask = 013;
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break;
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case 013:
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if (randomize)
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begin = BEGIN_DEF;
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else if (reps == 0)
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errx(1, "must specify begin if reps == 0");
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else
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begin = ender - reps * s + s;
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mask = 0;
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break;
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case 014:
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s = (randomize ? -1.0 : STEP_DEF);
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mask = 015;
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break;
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case 015:
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if (randomize)
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ender = ENDER_DEF;
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else
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ender = begin + reps * s - s;
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mask = 0;
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break;
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case 016:
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if (randomize)
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s = -1.0;
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else if (reps == 0)
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errx(1, "infinite sequences cannot be bounded");
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else if (reps == 1)
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s = 0.0;
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else
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s = (ender - begin) / (reps - 1);
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mask = 0;
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break;
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case 017: /* if reps given and implied, */
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if (!randomize && s != 0.0) {
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long t = (ender - begin + s) / s;
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if (t <= 0)
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errx(1, "impossible stepsize");
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if (t < reps) /* take lesser */
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reps = t;
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}
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mask = 0;
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break;
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default:
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errx(1, "bad mask");
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}
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if (reps == 0)
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infinity = 1;
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}
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void
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putdata(x, notlast)
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double x;
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long notlast;
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{
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if (boring) /* repeated word */
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printf(format);
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else if (chardata) /* character representation */
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printf(format, (int)x);
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else if (intdata && nosign) /* scalar */
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printf(format, (unsigned long)x);
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else if (intdata)
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printf(format, (long)x);
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else /* real */
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printf(format, x);
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if (notlast != 0)
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fputs(sepstring, stdout);
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}
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static void
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usage()
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{
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fprintf(stderr, "%s\n%s\n",
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"usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
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" [reps [begin [end [s]]]]");
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exit(1);
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}
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int
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getprec(s)
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char *s;
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{
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register char *p;
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register char *q;
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for (p = s; *p; p++)
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if (*p == '.')
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break;
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if (!*p)
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return (0);
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for (q = ++p; *p; p++)
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if (!isdigit(*p))
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break;
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return (p - q);
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}
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void
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getformat()
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{
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register char *p;
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int dot, hash, space, sign, numbers, islong = 0;
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char *s;
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if (boring) /* no need to bother */
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return;
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for (p = format; *p; p++) /* look for '%' */
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if (*p == '%' && *(p+1) != '%') /* leave %% alone */
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break;
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if (!*p && !chardata)
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sprintf(p, "%%.%df", prec);
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else if (!*p && chardata) {
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strcpy(p, "%c");
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intdata = 1;
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} else if (!*(p+1))
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strcat(format, "%"); /* cannot end in single '%' */
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else {
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/*
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* Allow conversion format specifiers of the form
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* %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
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* [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
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*/
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s = p++;
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dot = hash = space = sign = numbers = 0;
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while (!isalpha(*p)) {
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if (isdigit(*p)) {
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numbers++;
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p++;
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} else if ((*p == '#' && !(numbers|dot|sign|space|
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hash++)) ||
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(*p == ' ' && !(numbers|dot|space++)) ||
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((*p == '+' || *p == '-') && !(numbers|dot|sign++))
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|| (*p == '.' && !(dot++)))
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p++;
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else if (*p == '$' || *p == '*')
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errx(1, "unsupported format character %c", *p);
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else if (*p == '\0')
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errx(1, "missing format character");
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else
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errx(1, "illegal format character %c", *p);
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}
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switch (*p) {
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case 'l':
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islong = 1;
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p++;
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/* FALLTHROUGH */
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case 'o': case 'u': case 'x': case 'X':
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intdata = nosign = 1;
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break;
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case 'd': case 'i':
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intdata = 1;
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break;
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case 'D':
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if (!islong) {
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intdata = 1;
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break;
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}
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case 'O': case 'U':
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if (!islong) {
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intdata = nosign = 1;
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break;
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}
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case 'c':
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if (!(intdata | islong)) {
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chardata = 1;
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break;
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}
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case 's':
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errx(1, "cannot convert numeric data to strings");
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break;
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case 'h': case 'n': case 'p': case 'q': case 'L':
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case '$': case '*':
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errx(1, "unsupported format character %c", *p);
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/* NOTREACHED */
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case 'f': case 'e': case 'g': case 'E': case 'G':
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if (!islong)
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break;
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/* FALLTHROUGH */
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default:
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*++p = '\0';
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errx(1, "illegal or unsupported format '%s'", s);
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/* NOTREACHED */
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}
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while (*++p)
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if (*p == '%' && *(p+1) && *(p+1) != '%')
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errx(1, "too many conversions");
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else if (*p == '%' && *(p+1) == '%')
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p++;
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else if (*p == '%' && !*(p+1)) {
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strcat(format, "%");
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break;
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}
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}
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}
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void
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arith_oflow(int sig)
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{
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write(STDERR_FILENO, oflowstr, oflowlen);
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_exit(sig);
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}
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