| /* 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 |