Function venue_code_exists

#[no_mangle]
pub unsafe extern "C" fn venue_code_exists(
    code_ptr: *const c_char,
) -> u8

Checks if a venue code exists in the internal map.

Safety

Assumes code_ptr is a valid NUL-terminated UTF-8 C string pointer.

Panics

Panics if the internal mutex VENUE_MAP is poisoned.