Function change_decimal_from_locale_to_dot

numpy/core/src/common/numpyos.c:178–204

* Given a string that may have a decimal point in the current * locale, change it back to a dot. Since the string cannot get * longer, no need for a maximum buffer size parameter. */

 * longer, no need for a maximum buffer size parameter.
 */
static void
change_decimal_from_locale_to_dot(char* buffer)
{
    struct lconv *locale_data = localeconv();
    const char *decimal_point = locale_data->decimal_point;

    if (decimal_point[0] != '.' || decimal_point[1] != 0) {
        size_t decimal_point_len = strlen(decimal_point);

        if (*buffer == '+' || *buffer == '-') {
            buffer++;
        }
        while (isdigit(Py_CHARMASK(*buffer))) {
            buffer++;
        }
        if (strncmp(buffer, decimal_point, decimal_point_len) == 0) {
            *buffer = '.';
            buffer++;
            if (decimal_point_len > 1) {
                /* buffer needs to get smaller */
                size_t rest_len = strlen(buffer + (decimal_point_len - 1));
                memmove(buffer, buffer + (decimal_point_len - 1), rest_len);
                buffer[rest_len] = 0;
            }
        }
    }
}

/*
 * Check that the format string is a valid one for NumPyOS_ascii_format*