/* 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; 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