Function capabilities_from_enum

rust/stringzilla.rs:820–833

Copies the capabilities C-string into a fixed buffer and returns it. The returned SmallCString is guaranteed to be null-terminated.

(caps: u32)

/// Copies the capabilities C-string into a fixed buffer and returns it.
/// The returned SmallCString is guaranteed to be null-terminated.
pub(crate) fn capabilities_from_enum(caps: u32) -> SmallCString {
    let caps_ptr = unsafe { sz_capabilities_to_string(caps) };
    // Assume that the external function returns a valid null-terminated C string.
    let cstr = unsafe { CStr::from_ptr(caps_ptr as *const c_char) };
    let bytes = cstr.to_bytes();

    let mut buf = SmallCString::new();
    // Use core::fmt::Write to copy the bytes.
    // If the string is too long, it will fail. You might want to truncate in a real-world use.
    // Here, we assume it fits.
    let s = core::str::from_utf8(bytes).unwrap_or("");
    let _ = buf.write_str(s);
    buf
}

/// Copies the capabilities C-string into a fixed buffer and returns it.
/// The returned SmallCString is guaranteed to be null-terminated.