NetBSD/usr.bin/jot/jot.c

412 lines
9.1 KiB
C

/* $NetBSD: jot.c,v 1.15 2006/06/13 03:22:00 christos Exp $ */
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)jot.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: jot.c,v 1.15 2006/06/13 03:22:00 christos Exp $");
#endif /* not lint */
/*
* jot - print sequential or random data
*
* Author: John Kunze, Office of Comp. Affairs, UCB
*/
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define REPS_DEF 100
#define BEGIN_DEF 1
#define ENDER_DEF 100
#define STEP_DEF 1
#define is_default(s) (strcmp((s), "-") == 0)
double begin;
double ender;
double s;
long reps;
int randomize;
int infinity;
int boring;
int prec;
int dox;
int chardata;
int nofinalnl;
char sepstring[BUFSIZ] = "\n";
char format[BUFSIZ];
void getargs(int, char *[]);
void getformat(void);
int getprec(char *);
int main(int, char **);
void putdata(double, long);
static void usage(void);
int
main(int argc, char *argv[])
{
double xd, yd;
long id;
double *x = &xd;
double *y = &yd;
long *i = &id;
getargs(argc, argv);
if (randomize) {
*x = (ender - begin) * (ender > begin ? 1 : -1);
srandom((unsigned long) s);
for (*i = 1; *i <= reps || infinity; (*i)++) {
*y = (double) random() / INT_MAX;
putdata(*y * *x + begin, reps - *i);
}
}
else
for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
putdata(*x, reps - *i);
if (!nofinalnl)
putchar('\n');
exit(0);
}
void
getargs(int argc, char *argv[])
{
unsigned int mask = 0;
int n = 0;
while (--argc && **++argv == '-' && !is_default(*argv))
switch ((*argv)[1]) {
case 'r':
randomize = 1;
break;
case 'c':
chardata = 1;
break;
case 'n':
nofinalnl = 1;
break;
case 'b':
boring = 1;
case 'w':
if ((*argv)[2])
strlcpy(format, *argv + 2, sizeof(format));
else if (!--argc)
errx(1, "Need context word after -w or -b");
else
strlcpy(format, *++argv, sizeof(format));
break;
case 's':
if ((*argv)[2])
strlcpy(sepstring, *argv + 2, sizeof(sepstring));
else if (!--argc)
errx(1, "Need string after -s");
else
strlcpy(sepstring, *++argv, sizeof(sepstring));
break;
case 'p':
if ((*argv)[2])
prec = atoi(*argv + 2);
else if (!--argc)
errx(1, "Need number after -p");
else
prec = atoi(*++argv);
if (prec <= 0)
errx(1, "Bad precision value");
break;
default:
warnx("unknown option `%s'", *argv);
usage();
}
switch (argc) { /* examine args right to left, falling thru cases */
case 4:
if (!is_default(argv[3])) {
if (!sscanf(argv[3], "%lf", &s))
errx(1, "Bad s value: %s", argv[3]);
mask |= 01;
}
case 3:
if (!is_default(argv[2])) {
if (!sscanf(argv[2], "%lf", &ender))
ender = argv[2][strlen(argv[2])-1];
mask |= 02;
if (!prec)
n = getprec(argv[2]);
}
case 2:
if (!is_default(argv[1])) {
if (!sscanf(argv[1], "%lf", &begin))
begin = argv[1][strlen(argv[1])-1];
mask |= 04;
if (!prec)
prec = getprec(argv[1]);
if (n > prec) /* maximum precision */
prec = n;
}
case 1:
if (!is_default(argv[0])) {
if (!sscanf(argv[0], "%ld", &reps))
errx(1, "Bad reps value: %s", argv[0]);
mask |= 010;
}
break;
case 0:
usage();
break;
default:
errx(1, "Too many arguments. What do you mean by %s?", argv[4]);
}
getformat();
while (mask) /* 4 bit mask has 1's where last 4 args were given */
switch (mask) { /* fill in the 0's by default or computation */
case 001:
reps = REPS_DEF;
mask = 011;
break;
case 002:
reps = REPS_DEF;
mask = 012;
break;
case 003:
reps = REPS_DEF;
mask = 013;
break;
case 004:
reps = REPS_DEF;
mask = 014;
break;
case 005:
reps = REPS_DEF;
mask = 015;
break;
case 006:
reps = REPS_DEF;
mask = 016;
break;
case 007:
if (randomize) {
reps = REPS_DEF;
mask = 0;
break;
}
if (s == 0.0) {
reps = 0;
mask = 0;
break;
}
reps = (ender - begin + s) / s;
if (reps <= 0)
errx(1, "Impossible stepsize");
mask = 0;
break;
case 010:
begin = BEGIN_DEF;
mask = 014;
break;
case 011:
begin = BEGIN_DEF;
mask = 015;
break;
case 012:
s = (randomize ? time(NULL) * getpid() : STEP_DEF);
mask = 013;
break;
case 013:
if (randomize)
begin = BEGIN_DEF;
else if (reps == 0)
errx(1, "Must specify begin if reps == 0");
begin = ender - reps * s + s;
mask = 0;
break;
case 014:
s = (randomize ? time(NULL) * getpid() : STEP_DEF);
mask = 015;
break;
case 015:
if (randomize)
ender = ENDER_DEF;
else
ender = begin + reps * s - s;
mask = 0;
break;
case 016:
if (randomize)
s = time(NULL) * getpid();
else if (reps == 0)
errx(1, "Infinite sequences cannot be bounded");
else if (reps == 1)
s = 0.0;
else
s = (ender - begin) / (reps - 1);
mask = 0;
break;
case 017: /* if reps given and implied, */
if (!randomize && s != 0.0) {
long t = (ender - begin + s) / s;
if (t <= 0)
errx(1, "Impossible stepsize");
if (t < reps) /* take lesser */
reps = t;
}
mask = 0;
break;
default:
errx(1, "bad mask");
}
if (reps == 0)
infinity = 1;
}
void
putdata(double x, long notlast)
{
long d = x;
long *dp = &d;
if (boring) /* repeated word */
printf("%s", format);
else if (dox) /* scalar */
printf(format, *dp);
else if (prec == 0) /* integer */
printf(format, round(x));
else /* real */
printf(format, x);
if (notlast != 0)
fputs(sepstring, stdout);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: %s [-cnr] [-b word] [-p precision] "
"[-s string] [-w word] [reps [begin [end [s]]]]\n", getprogname());
exit(1);
}
int
getprec(char *s)
{
char *p;
char *q;
for (p = s; *p; p++)
if (*p == '.')
break;
if (!*p)
return (0);
for (q = ++p; *p; p++)
if (!isdigit((unsigned char)*p))
break;
return (p - q);
}
void
getformat(void)
{
char *p;
size_t sz;
if (boring) /* no need to bother */
return;
for (p = format; *p; p++) /* look for '%' */
if (*p == '%') {
if (*(p+1) != '%')
break;
p++; /* leave %% alone */
}
sz = sizeof(format) - strlen(format) - 1;
if (!*p) {
if (chardata) {
if (strlcpy(p, "%c", sz) >= sz)
errx(1, "-w word too long");
dox = 1;
} else {
if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
errx(1, "-w word too long");
}
} else if (!*(p+1)) {
if (sz <= 0)
errx(1, "-w word too long");
strcat(format, "%"); /* cannot end in single '%' */
} else {
p++; /* skip leading % */
for(; *p && !isalpha((unsigned char)*p); p++) {
/* allow all valid printf(3) flags, but deny '*' */
if (!strchr("0123456789#-+. ", *p))
break;
}
/* Allow 'l' prefix, but no other. */
if (*p == 'l')
p++;
switch (*p) {
case 'f': case 'e': case 'g': case '%':
case 'E': case 'G':
break;
case 's':
errx(1, "cannot convert numeric data to strings");
break;
case 'd': case 'o': case 'x': case 'u':
case 'D': case 'O': case 'X': case 'U':
case 'c': case 'i':
dox = 1;
break;
default:
errx(1, "unknown or invalid format `%s'", format);
}
/* Need to check for trailing stuff to print */
for (; *p; p++) /* look for '%' */
if (*p == '%') {
if (*(p+1) != '%')
break;
p++; /* leave %% alone */
}
if (*p)
errx(1, "unknown or invalid format `%s'", format);
}
}