Function NumPyOS_ascii_strtod

numpy/core/src/common/numpyos.c:457–510

* NumPyOS_ascii_strtod: * * Work around bugs in PyOS_ascii_strtod */

 * Work around bugs in PyOS_ascii_strtod
 */
NPY_NO_EXPORT double
NumPyOS_ascii_strtod(const char *s, char** endptr)
{
    const char *p;
    double result;

    while (NumPyOS_ascii_isspace(*s)) {
        ++s;
    }

    /*
     * ##1
     *
     * Recognize POSIX inf/nan representations on all platforms.
     */
    p = s;
    result = 1.0;
    if (*p == '-') {
        result = -1.0;
        ++p;
    }
    else if (*p == '+') {
        ++p;
    }
    if (NumPyOS_ascii_strncasecmp(p, "nan", 3) == 0) {
        p += 3;
        if (*p == '(') {
            ++p;
            while (NumPyOS_ascii_isalnum(*p) || *p == '_') {
                ++p;
            }
            if (*p == ')') {
                ++p;
            }
        }
        if (endptr != NULL) {
            *endptr = (char*)p;
        }
        return NPY_NAN;
    }
    else if (NumPyOS_ascii_strncasecmp(p, "inf", 3) == 0) {
        p += 3;
        if (NumPyOS_ascii_strncasecmp(p, "inity", 5) == 0) {
            p += 5;
        }
        if (endptr != NULL) {
            *endptr = (char*)p;
        }
        return result*NPY_INFINITY;
    }
    /* End of ##1 */

    return NumPyOS_ascii_strtod_plain(s, endptr);
}

NPY_NO_EXPORT long double
NumPyOS_ascii_strtold(const char *s, char** endptr)