osdStrtod.h File Reference

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Functions
LIBCOM_API double	epicsStrtod (const char *str, char **endp)

Function Documentation

LIBCOM_API double epicsStrtod	(	const char *	str,
		char **	endp
	)

Definition at line 346 of file epicsStdlib.c.

{
    const char *cp = str;
    int negative = 0;
    double res;

    while (isspace((int)*cp))
        cp++;

    if (*cp == '+') {
        cp++;
    } else if (*cp == '-') {
        negative = 1;
        cp++;
    }

    if (epicsStrnCaseCmp("0x", cp, 2) == 0) {
        if (negative)
            return strtol(str, endp, 16);
        else
            return strtoul(str, endp, 16);
    }
    if (!isalpha((int)*cp)) {
        res = strtod(str, endp);
        if (isinf(res))
            errno = ERANGE;
        return res;
    }

    if (epicsStrnCaseCmp("NAN", cp, 3) == 0) {
        res = epicsNAN;
        cp += 3;
        if (*cp == '(') {
            cp++;
            while (*cp && (*cp++ != ')'))
                continue;
        }
    }
    else if (epicsStrnCaseCmp("INF", cp, 3) == 0) {
        res = negative ? -epicsINF : epicsINF;
        cp += 3;
        if (epicsStrnCaseCmp("INITY", cp, 5) == 0) {
            cp += 5;
        }
    } else {
        cp = str;
        res = 0;
    }

    if (endp)
        *endp = (char *)cp;

    return res;
}