Method get_capability_info

resources/dism_dsc/src/dism.rs:396–457

(&self, name: &str)

    }

    pub fn get_capability_info(&self, name: &str) -> Result<DismCapabilityResult, String> {
        let get_cap_info = self.api.get_capability_info
            .ok_or_else(|| t!("dism.capabilitiesNotSupported").to_string())?;

        let wide_name = to_wide_null(name);
        let mut info_ptr: *mut DismCapabilityDetail = std::ptr::null_mut();

        let hr = unsafe {
            get_cap_info(
                self.handle,
                wide_name.as_ptr(),
                &mut info_ptr,
            )
        };

        if hr == DISMAPI_E_UNKNOWN_FEATURE {
            return Ok(DismCapabilityResult {
                name: name.to_string(),
                unknown: true,
                state: 0,
                display_name: String::new(),
                description: String::new(),
                download_size: 0,
                install_size: 0,
            });
        }

        if hr < 0 {
            return Err(t!("dism.getCapabilityInfoFailed", name = name, hr = format!("0x{:08X}", hr as u32)).to_string());
        }

        let result = unsafe {
            let detail = &*info_ptr;
            let cap_info = DismCapabilityResult {
                name: from_wide_ptr(detail.name),
                unknown: false,
                state: detail.state,
                display_name: from_wide_ptr(detail.display_name),
                description: from_wide_ptr(detail.description),
                download_size: detail.download_size,
                install_size: detail.install_size,
            };
            (self.api.delete)(info_ptr as *const c_void);
            cap_info
        };

        // Some Windows versions return success with empty name for unknown capabilities
        // instead of DISMAPI_E_UNKNOWN_FEATURE; detect and treat as unknown.
        if result.name.is_empty() {
            return Ok(DismCapabilityResult {
                name: name.to_string(),
                unknown: true,
                state: 0,
                display_name: String::new(),
                description: String::new(),
                download_size: 0,
                install_size: 0,
            });