89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
#include <math.h> /* just for HUGE_VAL */
|
|
|
|
#define NOT_DIGIT(a) (((unsigned char)(a-'0')) > 9)
|
|
|
|
#if 0 // UNUSED
|
|
double FAST_FUNC bb_strtod(const char *arg, char **endp)
|
|
{
|
|
double v;
|
|
char *endptr;
|
|
|
|
/* Allow .NN form. People want to use "sleep .15" etc */
|
|
if (arg[0] != '-' && arg[0] != '.' && NOT_DIGIT(arg[0]))
|
|
goto err;
|
|
errno = 0;
|
|
v = strtod(arg, &endptr);
|
|
if (endp)
|
|
*endp = endptr;
|
|
if (endptr[0]) {
|
|
/* "1234abcg" or out-of-range? */
|
|
if (isalnum(endptr[0]) || errno) {
|
|
err:
|
|
errno = ERANGE;
|
|
return HUGE_VAL;
|
|
}
|
|
/* good number, just suspicious terminator */
|
|
errno = EINVAL;
|
|
}
|
|
return v;
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
/* String to timespec: "NNNN[.NNNNN]" -> struct timespec.
|
|
* Can be used for other fixed-point needs.
|
|
* Returns pointer past last converted char,
|
|
* and returns errno similar to bb_strtoXX functions.
|
|
*/
|
|
char* FAST_FUNC bb_str_to_ts(struct timespec *ts, const char *arg)
|
|
{
|
|
if (sizeof(ts->tv_sec) <= sizeof(int))
|
|
ts->tv_sec = bb_strtou(arg, &arg, 10);
|
|
else if (sizeof(ts->tv_sec) <= sizeof(long))
|
|
ts->tv_sec = bb_strtoul(arg, &arg, 10);
|
|
else
|
|
ts->tv_sec = bb_strtoull(arg, &arg, 10);
|
|
ts->tv_nsec = 0;
|
|
|
|
if (*arg != '.')
|
|
return arg;
|
|
|
|
/* !EINVAL: number is not ok (alphanumeric ending, overflow etc) */
|
|
if (errno != EINVAL)
|
|
return arg;
|
|
|
|
if (!*++arg) /* "NNN." */
|
|
return arg;
|
|
|
|
{ /* "NNN.xxx" - parse xxx */
|
|
int ndigits;
|
|
char *p;
|
|
char buf[10]; /* we never use more than 9 digits */
|
|
|
|
/* Need to make a copy to avoid false overflow */
|
|
safe_strncpy(buf, arg, 10);
|
|
ts->tv_nsec = bb_strtou(buf, &p, 10);
|
|
ndigits = p - buf;
|
|
arg += ndigits;
|
|
/* normalize to nsec */
|
|
while (ndigits < 9) {
|
|
ndigits++;
|
|
ts->tv_nsec *= 10;
|
|
}
|
|
while (isdigit(*arg)) /* skip possible 10th plus digits */
|
|
arg++;
|
|
}
|
|
return arg;
|
|
}
|
|
#endif
|