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use std::{mem, fmt};
use std::ffi::CStr;
use std::collections::HashMap;
use libc::c_char;
use {sys, Error};
pub type FeatureCode = u8;
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Value {
pub mh: u8,
pub ml: u8,
pub sh: u8,
pub sl: u8,
}
impl Value {
pub fn from_raw(raw: &sys::DDCA_Non_Table_Value) -> Self {
Value {
mh: raw.mh,
ml: raw.ml,
sh: raw.sh,
sl: raw.sl,
}
}
pub fn value(&self) -> u16 {
((self.sh as u16) << 8) | self.sl as u16
}
pub fn maximum(&self) -> u16 {
((self.mh as u16) << 8) | self.ml as u16
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct MccsVersion {
pub major: u8,
pub minor: u8,
}
impl MccsVersion {
pub fn from_raw(raw: sys::DDCA_MCCS_Version_Spec) -> Self {
MccsVersion {
major: raw.major,
minor: raw.minor,
}
}
pub fn from_id(raw: sys::DDCA_MCCS_Version_Id) -> Result<Self, ()> {
match raw {
sys::DDCA_V10 => Ok(MccsVersion { major: 1, minor: 0 }),
sys::DDCA_V20 => Ok(MccsVersion { major: 2, minor: 0 }),
sys::DDCA_V21 => Ok(MccsVersion { major: 2, minor: 1 }),
sys::DDCA_V30 => Ok(MccsVersion { major: 3, minor: 0 }),
sys::DDCA_V22 => Ok(MccsVersion { major: 2, minor: 2 }),
_ => Err(()),
}
}
pub fn id(&self) -> Result<sys::DDCA_MCCS_Version_Id, ()> {
match *self {
MccsVersion { major: 1, minor: 0 } => Ok(sys::DDCA_V10),
MccsVersion { major: 2, minor: 0 } => Ok(sys::DDCA_V20),
MccsVersion { major: 2, minor: 1 } => Ok(sys::DDCA_V21),
MccsVersion { major: 3, minor: 0 } => Ok(sys::DDCA_V30),
MccsVersion { major: 2, minor: 2 } => Ok(sys::DDCA_V22),
_ => Err(()),
}
}
}
impl fmt::Display for MccsVersion {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}.{}", self.major, self.minor)
}
}
impl fmt::Debug for MccsVersion {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Capabilities {
pub version: MccsVersion,
pub features: HashMap<FeatureCode, Vec<u8>>,
}
impl Capabilities {
pub unsafe fn from_raw(raw: &sys::DDCA_Capabilities) -> Self {
Capabilities {
version: MccsVersion::from_raw(raw.version_spec),
features: raw.vcp_codes().iter().map(|raw| (raw.feature_code, raw.values().to_owned())).collect(),
}
}
pub fn from_cstr(caps: &CStr) -> ::Result<Self> {
unsafe {
let mut res = mem::uninitialized();
Error::from_status(sys::ddca_parse_capabilities_string(
caps.as_ptr() as *mut _, &mut res
))?;
let caps = Capabilities::from_raw(&*res);
sys::ddca_free_parsed_capabilities(res);
Ok(caps)
}
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct FeatureInfo {
pub name: String,
pub description: String,
pub value_names: HashMap<u8, String>,
pub flags: FeatureFlags,
}
impl FeatureInfo {
pub fn from_code(code: FeatureCode, version: MccsVersion) -> ::Result<Self> {
unsafe {
let mut res = mem::uninitialized();
Error::from_status(sys::ddca_get_feature_info_by_vcp_version(
code, version.id().unwrap_or(sys::DDCA_VANY), &mut res
))?;
let features = Self::from_raw(&*res);
Error::from_status(sys::ddca_free_feature_info(res))?;
Ok(features)
}
}
pub unsafe fn from_raw(raw: &sys::DDCA_Version_Feature_Info) -> Self {
unsafe fn from_ptr(ptr: *const c_char) -> String {
if ptr.is_null() {
Default::default()
} else {
CStr::from_ptr(ptr).to_string_lossy().into_owned()
}
}
FeatureInfo {
name: from_ptr(raw.feature_name),
description: from_ptr(raw.desc),
value_names: raw.sl_values().iter().map(|v| (
v.value_code,
from_ptr(v.value_name),
)).collect(),
flags: FeatureFlags::from_bits_truncate(raw.feature_flags),
}
}
}
bitflags! {
pub struct FeatureFlags: u16 {
const RO = sys::DDCA_RO;
const WO = sys::DDCA_WO;
const RW = sys::DDCA_RW;
const STD_CONT = sys::DDCA_STD_CONT;
const COMPLEX_CONT = sys::DDCA_COMPLEX_CONT;
const SIMPLE_NC = sys::DDCA_SIMPLE_NC;
const COMPLEX_NC = sys::DDCA_COMPLEX_NC;
const WO_NC = sys::DDCA_WO_NC;
const NORMAL_TABLE = sys::DDCA_NORMAL_TABLE;
const WO_TABLE = sys::DDCA_WO_TABLE;
const DEPRECATED = sys::DDCA_DEPRECATED;
const SYNTHETIC = sys::DDCA_SYNTHETIC;
}
}
impl FeatureFlags {
pub fn is_readable(&self) -> bool {
self.bits & sys::DDCA_READABLE != 0
}
pub fn is_writable(&self) -> bool {
self.bits & sys::DDCA_WRITABLE != 0
}
pub fn is_cont(&self) -> bool {
self.bits & sys::DDCA_CONT != 0
}
pub fn is_nc(&self) -> bool {
self.bits & sys::DDCA_NC != 0
}
pub fn is_non_table(&self) -> bool {
self.bits & sys::DDCA_NON_TABLE != 0
}
pub fn is_table(&self) -> bool {
self.bits & sys::DDCA_TABLE != 0
}
pub fn is_known(&self) -> bool {
self.bits & sys::DDCA_KNOWN != 0
}
}