File: [local] / src / usr.bin / jot / jot.c (download)
Revision 1.56, Fri Aug 13 12:37:28 2021 UTC (2 years, 9 months ago) by jmc
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, HEAD Changes since 1.55: +2 -2 lines
update usage() to reflect s->step change;
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/* $OpenBSD: jot.c,v 1.56 2021/08/13 12:37:28 jmc Exp $ */
/* $NetBSD: jot.c,v 1.3 1994/12/02 20:29:43 pk 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.
*/
/*
* 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 <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define REPS 1
#define BEGIN 2
#define ENDER 4
#define STEP 8
#define is_default(s) (strcmp((s), "-") == 0)
static long reps = 100;
static double begin = 1;
static double ender = 100;
static double step = 1;
static char *format = "";
static char *sepstring = "\n";
static int prec = -1;
static bool boring;
static bool chardata;
static bool finalnl = true;
static bool infinity;
static bool intdata;
static bool longdata;
static bool nosign;
static bool randomize;
static bool word;
static void getformat(void);
static int getprec(char *);
static int putdata(double, bool);
static void __dead usage(void);
int
main(int argc, char *argv[])
{
double x;
double y;
long i;
unsigned int mask = 0;
int n = 0;
int ch;
const char *errstr;
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
while ((ch = getopt(argc, argv, "b:cnp:rs:w:")) != -1) {
switch (ch) {
case 'b':
boring = true;
chardata = word = false;
format = optarg;
break;
case 'c':
chardata = true;
boring = word = false;
format = "";
break;
case 'n':
finalnl = false;
break;
case 'p':
prec = strtonum(optarg, 0, INT_MAX, &errstr);
if (errstr != NULL)
errx(1, "bad precision value, %s: %s", errstr,
optarg);
break;
case 'r':
randomize = true;
break;
case 's':
sepstring = optarg;
break;
case 'w':
word = true;
boring = chardata = false;
format = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
switch (argc) { /* examine args right to left, falling thru cases */
case 4:
if (!is_default(argv[3])) {
if (!sscanf(argv[3], "%lf", &step))
errx(1, "Bad s value: %s", argv[3]);
mask |= STEP;
if (randomize)
warnx("random seeding not supported");
}
case 3:
if (!is_default(argv[2])) {
if (!sscanf(argv[2], "%lf", &ender))
ender = argv[2][strlen(argv[2])-1];
mask |= ENDER;
if (prec == -1)
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 |= BEGIN;
if (prec == -1)
prec = getprec(argv[1]);
if (n > prec) /* maximum precision */
prec = n;
}
case 1:
if (!is_default(argv[0])) {
reps = strtonum(argv[0], 0, LONG_MAX, &errstr);
if (errstr != NULL)
errx(1, "Bad reps value, %s: %s", errstr,
argv[0]);
mask |= REPS;
if (reps == 0)
infinity = true;
}
case 0:
if (prec == -1)
prec = 0;
break;
default:
errx(1, "Too many arguments. What do you mean by %s?",
argv[4]);
}
if (!boring)
getformat();
if (!randomize) {
/*
* Consolidate the values of reps, begin, ender, step:
* The formula ender - begin == (reps - 1) * step shows that any
* three determine the fourth (unless reps == 1 or step == 0).
* The manual states the following rules:
* 1. If four are specified, compare the given and the computed
* value of reps and take the smaller of the two.
* 2. If steps was omitted, it takes the default, unless both
* begin and ender were specified.
* 3. Assign defaults to omitted values for reps, begin, ender,
* from left to right.
*/
switch (mask) { /* Four cases involve both begin and ender. */
case REPS | BEGIN | ENDER | STEP:
if (infinity)
errx(1,
"Can't specify end of infinite sequence");
if (step != 0.0) {
long t = (ender - begin + step) / step;
if (t <= 0)
errx(1, "Impossible stepsize");
if (t < reps)
reps = t;
}
break;
case REPS | BEGIN | ENDER:
if (infinity)
errx(1,
"Can't specify end of infinite sequence");
if (reps == 1)
step = 0.0;
else
step = (ender - begin) / (reps - 1);
break;
case BEGIN | ENDER:
step = ender > begin ? 1 : -1; /* FreeBSD's behavior. */
/* FALLTHROUGH */
case BEGIN | ENDER | STEP:
if (step == 0.0) {
reps = 0;
infinity = true;
break;
}
reps = (ender - begin + step) / step;
if (reps <= 0)
errx(1, "Impossible stepsize");
break;
case ENDER: /* Four cases involve only ender. */
case ENDER | STEP:
case REPS | ENDER:
case REPS | ENDER | STEP:
if (infinity)
errx(1,
"Must specify start of infinite sequence");
begin = ender - reps * step + step;
break;
default:
/*
* The remaining eight cases omit ender. We don't need
* to compute anything because only reps, begin, step
* are used for producing output below. Rules 2. and 3.
* together imply that ender will be set last.
*/
break;
}
for (i = 1, x = begin; i <= reps || infinity; i++, x += step)
if (putdata(x, reps == i && !infinity))
errx(1, "range error in conversion: %f", x);
} else { /* Random output: use defaults for omitted values. */
bool use_unif = 0;
uint32_t pow10 = 1;
uint32_t uintx = 0; /* Initialized to make gcc happy. */
if (prec > 9) /* pow(10, prec) > UINT32_MAX */
errx(1, "requested precision too large");
if (ender < begin) {
x = begin;
begin = ender;
ender = x;
}
x = ender - begin;
if (prec > 0 || (fmod(ender, 1) == 0 && fmod(begin, 1) == 0)) {
double range;
while (prec-- > 0)
pow10 *= 10;
range = pow10 * (ender - begin);
/* If range is an integer, use arc4random_uniform(). */
if (fmod(range, 1) == 0) {
if (range >= UINT32_MAX)
errx(1, "requested range too large");
use_unif = 1;
uintx = range + 1;
}
}
for (i = 1; i <= reps || infinity; i++) {
double v;
if (use_unif) {
y = arc4random_uniform(uintx) / (double)pow10;
v = y + begin;
} else {
y = arc4random() / ((double)0xffffffff + 1);
v = y * x + begin;
}
if (putdata(v, reps == i && !infinity))
errx(1, "range error in conversion: %f", v);
}
}
if (finalnl)
putchar('\n');
return 0;
}
static int
putdata(double x, bool last)
{
if (boring)
printf("%s", format);
else if (longdata && nosign) {
if (x < 0.0 || x > (double)ULONG_MAX)
return 1;
printf(format, (unsigned long)x);
} else if (longdata) {
if (x < (double)LONG_MIN || x > (double)LONG_MAX)
return 1;
printf(format, (long)x);
} else if (chardata || (intdata && !nosign)) {
if (x < (double)INT_MIN || x > (double)INT_MAX)
return 1;
printf(format, (int)x);
} else if (intdata) {
if (x < 0.0 || x > (double)UINT_MAX)
return 1;
printf(format, (unsigned int)x);
} else
printf(format, x);
if (!last)
fputs(sepstring, stdout);
return 0;
}
static void __dead
usage(void)
{
(void)fprintf(stderr, "usage: jot [-cnr] [-b word] [-p precision] "
"[-s string] [-w word]\n"
" [reps [begin [end [step]]]]\n");
exit(1);
}
static int
getprec(char *s)
{
if ((s = strchr(s, '.')) == NULL)
return 0;
return strspn(s + 1, "0123456789");
}
static void
getformat(void)
{
char *p;
p = format;
while ((p = strchr(p, '%')) != NULL && p[1] == '%')
p += 2;
if (p == NULL && !chardata) {
if (asprintf(&format, "%s%%.%df", format, prec) == -1)
err(1, NULL);
} else if (p == NULL && chardata) {
if (asprintf(&format, "%s%%c", format) == -1)
err(1, NULL);
} else if (p[1] == '\0') {
/* cannot end in single '%' */
if (asprintf(&format, "%s%%", format) == -1)
err(1, NULL);
} else {
/*
* Allow conversion format specifiers of the form
* %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
* [l]{d,i,o,u,x} or {f,e,g,F,E,G,d,o,x,D,O,U,X,c,u}
*/
char *fmt;
int dot, hash, space, sign, numbers;
fmt = p++;
dot = hash = space = sign = numbers = 0;
while (!isalpha((unsigned char)*p)) {
if (isdigit((unsigned char)*p)) {
numbers++;
p++;
} else if ((*p == '#' && !(numbers|dot|sign|space|
hash++)) ||
(*p == ' ' && !(numbers|dot|space++)) ||
((*p == '+' || *p == '-') && !(numbers|dot|sign++))
|| (*p == '.' && !(dot++)))
p++;
else
goto fmt_broken;
}
if (*p == 'l') {
longdata = true;
if (*++p == 'l') {
p++;
goto fmt_broken;
}
}
switch (*p) {
case 'd':
case 'i':
intdata = true;
break;
case 'o':
case 'u':
case 'x':
case 'X':
intdata = nosign = true;
break;
case 'D':
if (longdata)
goto fmt_broken;
longdata = intdata = true; /* same as %ld */
break;
case 'O':
case 'U':
if (longdata)
goto fmt_broken;
longdata = intdata = nosign = true; /* same as %l[ou] */
break;
case 'c':
if (longdata)
goto fmt_broken;
chardata = true;
break;
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
if (longdata)
goto fmt_broken;
/* No cast needed for printing in putdata() */
break;
default:
fmt_broken:
errx(1, "illegal or unsupported format '%.*s'",
(int)(p + 1 - fmt), fmt);
}
while ((p = strchr(p, '%')) != NULL && p[1] == '%')
p += 2;
if (p != NULL) {
if (p[1] != '\0')
errx(1, "too many conversions");
/* cannot end in single '%' */
if (asprintf(&format, "%s%%", format) == -1)
err(1, NULL);
}
}
}