Function eccodes_sys::codes_index_select_double

pub unsafe extern "C" fn codes_index_select_double(
    index: *mut codes_index, 
    key: *const c_char, 
    value: f64
) -> c_int

Select the message subset with key==value. The value is a double. The key must have been created with double type or have double as native type if the type was not explicitly defined in the index creation.

@param index : an index created from a file. The index must have been created with the key in argument. @param key : key to be selected @param value : value of the key to select @return 0 if OK, integer value on error