2017-06-29 12:25:40 +00:00
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use alsa::card::Card;
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2017-06-29 12:55:07 +00:00
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use alsa::mixer::{Mixer, Selem, SelemId};
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2017-06-29 12:25:40 +00:00
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use alsa::poll::PollDescriptors;
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use alsa_sys;
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use errors::*;
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use glib_sys;
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2017-06-28 15:53:19 +00:00
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use libc::c_uint;
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use libc::pollfd;
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2017-06-29 12:25:40 +00:00
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use libc::size_t;
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use myalsa::*;
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2017-06-28 23:35:30 +00:00
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use std::mem;
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use std::ptr;
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use std::u8;
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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// TODO: implement free/destructor
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pub struct AlsaCard {
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_cannot_construct: (),
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pub card: Card,
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pub mixer: Mixer,
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pub selem_id: SelemId,
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pub watch_ids: Vec<u32>,
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}
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2017-06-29 12:55:07 +00:00
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/* TODO: AlsaCard cleanup */
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2017-06-29 12:25:40 +00:00
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impl AlsaCard {
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pub fn new(
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card_name: Option<String>,
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elem_name: Option<String>,
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) -> Result<AlsaCard> {
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let card = {
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match card_name {
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Some(name) => get_alsa_card_by_name(name)?,
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None => get_default_alsa_card(),
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}
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};
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let mixer = get_mixer(&card)?;
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let selem_id = get_selem_by_name(
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&mixer,
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elem_name.unwrap_or(String::from("Master")),
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).unwrap()
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.get_id();
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let vec_pollfd = PollDescriptors::get(&mixer)?;
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/* TODO: callback is registered here, which must be unregistered
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* when the mixer is destroyed!! */
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let watch_ids = watch_poll_descriptors(vec_pollfd, &mixer);
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return Ok(AlsaCard {
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_cannot_construct: (),
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card: card,
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mixer: mixer,
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selem_id: selem_id,
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watch_ids: watch_ids,
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});
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2017-06-28 12:55:38 +00:00
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}
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn selem(&self) -> Selem {
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return get_selems(&self.mixer)
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.nth(self.selem_id.get_index() as usize)
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.unwrap();
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn vol(&self) -> Result<f64> {
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return get_vol(&self.selem());
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn set_vol(&self, new_vol: f64) -> Result<()> {
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return set_vol(&self.selem(), new_vol);
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn has_mute(&self) -> bool {
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return has_mute(&self.selem());
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn get_mute(&self) -> Result<bool> {
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return get_mute(&self.selem());
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2017-06-26 07:08:37 +00:00
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}
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn set_mute(&self, mute: bool) -> Result<()> {
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return set_mute(&self.selem(), mute);
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}
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2017-06-26 15:56:09 +00:00
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}
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2017-06-27 22:23:12 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub enum AudioUser {
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AudioUserUnknown,
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AudioUserPopup,
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AudioUserTrayIcon,
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AudioUserHotkeys,
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2017-06-28 15:53:19 +00:00
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}
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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enum AudioSignal {
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AudioNoCard,
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AudioCardInitialized,
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AudioCardCleanedUp,
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AudioCardDisconnected,
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AudioCardError,
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AudioValuesChanged,
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2017-06-27 22:23:12 +00:00
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}
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2017-06-29 12:25:40 +00:00
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fn watch_poll_descriptors(
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2017-06-28 15:53:19 +00:00
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polls: Vec<pollfd>,
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2017-06-29 11:43:32 +00:00
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mixer: &Mixer,
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2017-06-28 15:53:19 +00:00
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) -> Vec<c_uint> {
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let mut watch_ids: Vec<c_uint> = vec![];
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2017-06-29 10:51:28 +00:00
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let mixer_ptr = unsafe {
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2017-06-29 11:43:32 +00:00
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mem::transmute::<&Mixer, &*mut alsa_sys::snd_mixer_t>(mixer)
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2017-06-28 23:35:30 +00:00
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};
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2017-06-28 15:53:19 +00:00
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for poll in polls {
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unsafe {
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2017-06-29 10:51:28 +00:00
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let gioc: *mut glib_sys::GIOChannel =
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glib_sys::g_io_channel_unix_new(poll.fd);
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2017-06-28 15:53:19 +00:00
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watch_ids.push(glib_sys::g_io_add_watch(
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gioc,
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2017-06-28 23:35:30 +00:00
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glib_sys::GIOCondition::from_bits(
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2017-06-28 15:53:19 +00:00
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glib_sys::G_IO_IN.bits() | glib_sys::G_IO_ERR.bits(),
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2017-06-28 23:35:30 +00:00
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).unwrap(),
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2017-06-28 15:53:19 +00:00
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Some(watch_cb),
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2017-06-29 11:43:32 +00:00
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*mixer_ptr as glib_sys::gpointer,
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2017-06-28 15:53:19 +00:00
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));
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}
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}
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2017-06-28 23:35:30 +00:00
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return watch_ids;
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2017-06-28 15:53:19 +00:00
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}
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2017-06-29 12:55:07 +00:00
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2017-06-29 10:51:28 +00:00
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extern fn watch_cb(
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2017-06-28 15:53:19 +00:00
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chan: *mut glib_sys::GIOChannel,
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cond: glib_sys::GIOCondition,
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data: glib_sys::gpointer,
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) -> glib_sys::gboolean {
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2017-06-28 23:35:30 +00:00
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let mixer = data as *mut alsa_sys::snd_mixer_t;
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unsafe {
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alsa_sys::snd_mixer_handle_events(mixer);
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}
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if cond == glib_sys::G_IO_ERR {
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return false as glib_sys::gboolean;
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}
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2017-06-29 10:51:28 +00:00
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let mut sread: size_t = 1;
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2017-06-29 11:43:32 +00:00
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let mut buf: Vec<u8> = vec![0; 256];
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2017-06-28 23:35:30 +00:00
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while sread > 0 {
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2017-06-29 10:51:28 +00:00
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let stat: glib_sys::GIOStatus = unsafe {
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glib_sys::g_io_channel_read_chars(
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chan,
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2017-06-29 11:43:32 +00:00
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buf.as_mut_ptr() as *mut u8,
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2017-06-29 10:51:28 +00:00
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256,
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&mut sread as *mut size_t,
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ptr::null_mut(),
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)
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2017-06-28 23:35:30 +00:00
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};
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2017-06-29 11:43:32 +00:00
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2017-06-28 23:35:30 +00:00
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match stat {
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2017-06-29 11:43:32 +00:00
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glib_sys::G_IO_STATUS_AGAIN => {
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println!("G_IO_STATUS_AGAIN");
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continue
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},
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2017-06-29 10:51:28 +00:00
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glib_sys::G_IO_STATUS_NORMAL => println!("G_IO_STATUS_NORMAL"),
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glib_sys::G_IO_STATUS_ERROR => println!("G_IO_STATUS_ERROR"),
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glib_sys::G_IO_STATUS_EOF => println!("G_IO_STATUS_EOF"),
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2017-06-28 23:35:30 +00:00
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}
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return true as glib_sys::gboolean;
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2017-06-29 10:51:28 +00:00
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}
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2017-06-28 23:35:30 +00:00
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2017-06-28 15:53:19 +00:00
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return true as glib_sys::gboolean;
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}
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2017-06-28 23:35:30 +00:00
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