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/*
* fractal
* Written in 2020 by Lucas
* CC0 1.0 Universal/Public domain - No rights reserved
*
* To the extent possible under law, the author(s) have dedicated all
* copyright and related and neighboring rights to this software to the
* public domain worldwide. This software is distributed without any
* warranty. You should have received a copy of the CC0 Public Domain
* Dedication along with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
/* srand48 visibility for GLIBC */
#if !defined(__OpenBSD__)
#define _DEFAULT_SOURCE
#endif
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
void
err(int eval, const char *fmt, ...)
{
va_list ap;
int saved_errno;
saved_errno = errno;
va_start(ap, fmt);
fprintf(stderr, "%s: ", xgetprogname());
if (fmt != NULL) {
vfprintf(stderr, fmt, ap);
fprintf(stderr, ": ");
}
fprintf(stderr, "%s\n", strerror(saved_errno));
va_end(ap);
exit(eval);
}
void
errx(int eval, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (fmt != NULL) {
fprintf(stderr, "%s: ", xgetprogname());
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
}
va_end(ap);
exit(eval);
}
long double
parse_double(const char *nptr)
{
char *end;
long double v;
errno = 0;
v = strtold(nptr, &end);
if (nptr == end || *end != '\0' || (v == 0 && errno == EINVAL))
errx(1, "invalid number: %s", nptr);
if (errno == ERANGE)
errx(1, "number out of range: %s", nptr);
return v;
}
long long
parse_integer(const char *nptr, long long minval, long long maxval)
{
char *end;
long long v;
errno = 0;
v = strtoll(nptr, &end, 10);
if (nptr == end || *end != '\0' || (v == 0 && errno == EINVAL))
errx(1, "invalid number: %s", nptr);
if (v == 0 && errno == ERANGE)
errx(1, "number out of range: %s", nptr);
if (v < minval)
errx(1, "number too low: %s", nptr);
if (v > maxval)
errx(1, "number too high: %s", nptr);
return v;
}
const char *
xgetprogname(void)
{
#if defined(__OpenBSD__)
return getprogname();
#else
extern char *__progname;
return __progname;
#endif
}
void
xsrand48(long seed)
{
#if defined(__OpenBSD__)
srand48_deterministic(seed);
#else
srand48(seed);
#endif
}