- c-stringtype
- nonnull-c-stringtype
A zero-terminated C string. The argument value #f is allowed and is passed as a NULL pointer; similarly, a NULL pointer is returned as #f. Note that the string contents are copied into (automatically managed) temporary storage with a zero byte appended when passed as an argument. Also, a return value of this type is copied into garbage collected memory using strcpy(3).
For the nonnull- variant, passing #f will raise an exception, and returning a NULL pointer will result in undefined behavior (e.g. a segfault).