OpenBSD-4.6/usr.bin/jot/jot.c
/* $OpenBSD: jot.c,v 1.19 2007/05/01 01:26:30 jdixon 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.
*/
#ifndef lint
static const char 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
static const char rcsid[] = "$OpenBSD: jot.c,v 1.19 2007/05/01 01:26:30 jdixon Exp $";
#endif /* not lint */
/*
* jot - print sequential or random data
*
* Author: John Kunze, Office of Comp. Affairs, UCB
*/
#include <err.h>
#include <stdbool.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define REPS_DEF 100
#define BEGIN_DEF 1
#define ENDER_DEF 100
#define STEP_DEF 1
#define is_default(s) (strcmp((s), "-") == 0)
static double begin;
static double ender;
static double s;
static long reps;
static bool randomize;
static bool infinity;
static bool boring;
static int prec = -1;
static bool intdata;
static bool longdata;
static bool chardata;
static bool nosign;
static bool finalnl = true;
static char sepstring[BUFSIZ] = "\n";
static char format[BUFSIZ];
static void getformat(void);
static int getprec(char *);
static int putdata(double, bool);
static void 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;
while ((ch = getopt(argc, argv, "rb:w:cs:np:")) != -1)
switch (ch) {
case 'r':
randomize = true;
break;
case 'c':
chardata = true;
break;
case 'n':
finalnl = false;
break;
case 'b':
boring = true;
if (strlcpy(format, optarg, sizeof(format)) >=
sizeof(format))
errx(1, "-b word too long");
break;
case 'w':
if (strlcpy(format, optarg, sizeof(format)) >=
sizeof(format))
errx(1, "-w word too long");
break;
case 's':
if (strlcpy(sepstring, optarg, sizeof(sepstring)) >=
sizeof(sepstring))
errx(1, "-s word too long");
break;
case 'p':
prec = strtonum(optarg, 0, INT_MAX, &errstr);
if (errstr != NULL)
errx(1, "bad precision value, %s: %s", errstr,
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", &s))
errx(1, "Bad s value: %s", argv[3]);
mask |= 01;
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 |= 02;
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 |= 04;
if (prec == -1)
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;
if (prec == -1)
prec = 0;
}
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 = 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 = STEP_DEF;
mask = 015;
break;
case 015:
if (randomize)
ender = ENDER_DEF;
else
ender = begin + reps * s - s;
mask = 0;
break;
case 016:
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 = true;
if (randomize) {
x = (ender - begin) * (ender > begin ? 1 : -1);
for (i = 1; i <= reps || infinity; i++) {
double v;
y = arc4random() / ((double)0xffffffff + 1);
v = y * x + begin;
if (putdata(v, reps == i && !infinity))
errx(1, "range error in conversion: %f", v);
}
}
else
for (i = 1, x = begin; i <= reps || infinity; i++, x += s)
if (putdata(x, reps == i && !infinity))
errx(1, "range error in conversion: %f", x);
if (finalnl)
putchar('\n');
exit(0);
}
static int
putdata(double x, bool last)
{
if (boring)
printf("%s", format);
else if (longdata && nosign) {
if (x <= (double)ULONG_MAX && x >= 0.0)
printf(format, (unsigned long)x);
else
return (1);
} else if (longdata) {
if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
printf(format, (long)x);
else
return (1);
} else if (chardata || (intdata && !nosign)) {
if (x <= (double)INT_MAX && x >= (double)INT_MIN)
printf(format, (int)x);
else
return (1);
} else if (intdata) {
if (x <= (double)UINT_MAX && x >= 0.0)
printf(format, (unsigned int)x);
else
return (1);
} else
printf(format, x);
if (!last)
fputs(sepstring, stdout);
return (0);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: jot [-cnr] [-b word] [-p precision] "
"[-s string] [-w word]\n"
" [reps [begin [end [s]]]]\n");
exit(1);
}
static int
getprec(char *s)
{
char *p;
char *q;
for (p = s; *p != '\0'; p++)
if (*p == '.')
break;
if (*p == '\0')
return (0);
for (q = ++p; *p != '\0'; p++)
if (!isdigit(*p))
break;
return (p - q);
}
static void
getformat(void)
{
char *p, *p2;
int dot, hash, space, sign, numbers = 0;
size_t sz;
if (boring) /* no need to bother */
return;
for (p = format; *p != '\0'; p++) /* look for '%' */
if (*p == '%' && *(p+1) != '%') /* leave %% alone */
break;
sz = sizeof(format) - strlen(format) - 1;
if (*p == '\0' && !chardata) {
int n;
n = snprintf(p, sz, "%%.%df", prec);
if (n == -1 || n >= (int)sz)
errx(1, "-w word too long");
} else if (*p == '\0' && chardata) {
if (strlcpy(p, "%c", sz) >= sz)
errx(1, "-w word too long");
intdata = true;
} else if (*(p+1) == '\0') {
if (sz <= 0)
errx(1, "-w word too long");
/* cannot end in single '%' */
strlcat(format, "%", sizeof format);
} 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,E,G,d,o,x,D,O,U,X,c,u}
*/
p2 = p++;
dot = hash = space = sign = numbers = 0;
while (!isalpha(*p)) {
if (isdigit(*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') {
if (p[1] != '\0')
p++;
goto fmt_broken;
}
}
switch (*p) {
case 'o': case 'u': case 'x': case 'X':
intdata = nosign = true;
break;
case 'd': case 'i':
intdata = true;
break;
case 'D':
if (!longdata) {
intdata = true;
break;
}
case 'O': case 'U':
if (!longdata) {
intdata = nosign = true;
break;
}
case 'c':
if (!(intdata | longdata)) {
chardata = true;
break;
}
case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
case '$': case '*':
goto fmt_broken;
case 'f': case 'e': case 'g': case 'E': case 'G':
if (!longdata)
break;
/* FALLTHROUGH */
default:
fmt_broken:
*++p = '\0';
errx(1, "illegal or unsupported format '%s'", p2);
/* NOTREACHED */
}
while (*++p != '\0')
if (*p == '%' && *(p+1) != '\0' && *(p+1) != '%')
errx(1, "too many conversions");
else if (*p == '%' && *(p+1) == '%')
p++;
else if (*p == '%' && *(p+1) == '\0') {
strlcat(format, "%", sizeof format);
break;
}
}
}