busybox

/* 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 source tree.

 */

​

#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;