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take_owned_cstring

doom_fish_utils::ffi_string

Function take_owned_cstring 

Source 
pub unsafe fn take_owned_cstring<Free>(
    ptr: *mut i8,
    free_fn: Free,
) -> Option<String>
where
    Free: FnOnce(*mut i8),
Expand description

Take ownership of an already-obtained Swift/Objective-C C string pointer and free the source via free_fn.

This matches the common take_string(ptr) -> Option<String> pattern that every doom-fish crate has been duplicating locally. Use this from your crate’s bridge helper so the body lives in one place.

Returns Some(String) for a non-null, non-empty pointer; None otherwise. In both branches the pointer is freed (the null branch is a no-op).

§Safety

The caller must guarantee that ptr is either null or a valid, null-terminated C string allocated by the Swift / Objective-C bridge in a way that free_fn correctly releases. The pointer is consumed exactly once.