bloomberg 0.2.0

Rust API for Bloomberg.
Documentation 
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use crate::bindings::*;
use crate::{session::SessionSync, Error};
use std::ffi::{CStr, CString};
use std::os::raw::c_int;

pub struct SessionOptions(pub(crate) *mut blpapi_SessionOptions_t);

impl SessionOptions {
    pub fn client_mode(&self) -> Result<ClientMode, Error> {
        let mode: i32 = unsafe { blpapi_SessionOptions_clientMode(self.0) };

        Error::check(mode)?;

        match mode as u32 {
            BLPAPI_CLIENTMODE_AUTO => Ok(ClientMode::Auto),
            BLPAPI_CLIENTMODE_DAPI => Ok(ClientMode::DApi),
            BLPAPI_CLIENTMODE_SAPI => Ok(ClientMode::SApi),
            BLPAPI_CLIENTMODE_COMPAT_33X => Ok(ClientMode::Compat33X),
            _ => Err(Error::Generic(mode)),
        }
    }

    pub fn set_client_mode(&mut self, mode: ClientMode) {
        let mode = match mode {
            ClientMode::Auto => BLPAPI_CLIENTMODE_AUTO,
            ClientMode::DApi => BLPAPI_CLIENTMODE_DAPI,
            ClientMode::SApi => BLPAPI_CLIENTMODE_SAPI,
            ClientMode::Compat33X => BLPAPI_CLIENTMODE_COMPAT_33X,
        };

        unsafe {
            blpapi_SessionOptions_setClientMode(self.0, mode as c_int);
        }
    }

    pub fn server_host(&self) -> String {
        let chost: &CStr = unsafe { CStr::from_ptr(blpapi_SessionOptions_serverHost(self.0)) };

        chost.to_string_lossy().into_owned()
    }

    pub fn with_server_host(self, host: &str) -> Result<Self, Error> {
        let chost: CString = CString::new(host).unwrap();
        let res: i32 = unsafe { blpapi_SessionOptions_setServerHost(self.0, chost.as_ptr()) };

        Error::check(res)?;

        Ok(self)
    }

    pub fn server_port(&self) -> u16 {
        unsafe { blpapi_SessionOptions_serverPort(self.0) as u16 }
    }

    pub fn with_server_port(self, port: u16) -> Result<Self, Error> {
        let res: i32 = unsafe { blpapi_SessionOptions_setServerPort(self.0, port) };

        Error::check(res)?;

        Ok(self)
    }

    pub fn sync(self) -> SessionSync {
        SessionSync::from_options(self)
    }
}

impl Drop for SessionOptions {
    fn drop(&mut self) {
        unsafe { blpapi_SessionOptions_destroy(self.0) }
    }
}

impl Clone for SessionOptions {
    fn clone(&self) -> Self {
        let cloned: SessionOptions = SessionOptions::default();

        unsafe {
            blpapi_SessionOptions_copy(self.0, cloned.0);
        }

        cloned
    }
}

impl Default for SessionOptions {
    fn default() -> Self {
        unsafe { SessionOptions(blpapi_SessionOptions_create()) }
    }
}

#[derive(Debug, Clone, Copy)]
pub enum ClientMode {
    Auto,
    DApi,
    SApi,
    Compat33X,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_server_host() {
        let host: &str = "localhost";
        let options: SessionOptions = SessionOptions::default().with_server_host(host).unwrap();

        assert_eq!(host, options.server_host());

        let _session: SessionSync = options.sync();
    }
}