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#![deny(
missing_docs,
missing_debug_implementations,
missing_copy_implementations,
unstable_features,
unused_import_braces,
unused_qualifications
)]
#![allow(clippy::useless_conversion)]
use std::{
collections::HashMap,
ffi::{CStr, CString},
fmt,
os::raw::{c_char, c_int, c_uint, c_void},
slice, str,
str::FromStr,
};
use libiio_sys::{self as ffi};
use nix::errno;
pub use crate::buffer::*;
pub use crate::channel::*;
pub use crate::context::*;
pub use crate::device::*;
pub use crate::errors::*;
mod macros;
pub mod buffer;
pub mod channel;
pub mod context;
pub mod device;
pub mod errors;
const ATTR_BUF_SIZE: usize = 16384;
fn cstring_opt(pstr: *const c_char) -> Option<String> {
if pstr.is_null() {
None
}
else {
let name = unsafe { CStr::from_ptr(pstr) };
Some(name.to_str().unwrap_or_default().to_string())
}
}
pub(crate) fn sys_result<T>(ret: i32, result: T) -> Result<T> {
if ret < 0 {
Err(errno::from_i32(-ret).into())
}
else {
Ok(result)
}
}
pub trait ToAttribute: fmt::Display {
fn to_attr(&self) -> Result<String> {
Ok(format!("{}", self))
}
}
pub trait FromAttribute: FromStr {
fn from_attr(s: &str) -> Result<Self> {
let val = Self::from_str(s).map_err(|_| Error::StringConversionError)?;
Ok(val)
}
}
impl ToAttribute for bool {
fn to_attr(&self) -> Result<String> {
Ok((if *self { "1" } else { "0" }).into())
}
}
impl FromAttribute for bool {
fn from_attr(s: &str) -> Result<Self> {
Ok(s.trim() != "0")
}
}
impl ToAttribute for i32 {}
impl ToAttribute for u32 {}
impl ToAttribute for i64 {}
impl ToAttribute for u64 {}
impl ToAttribute for i128 {}
impl ToAttribute for u128 {}
impl ToAttribute for f64 {}
impl ToAttribute for str {}
impl ToAttribute for &str {}
impl ToAttribute for String {}
impl FromAttribute for i32 {}
impl FromAttribute for u32 {}
impl FromAttribute for i64 {}
impl FromAttribute for u64 {}
impl FromAttribute for i128 {}
impl FromAttribute for u128 {}
impl FromAttribute for f64 {}
impl FromAttribute for String {}
pub(crate) unsafe extern "C" fn attr_read_all_cb(
_chan: *mut ffi::iio_device,
attr: *const c_char,
val: *const c_char,
_len: usize,
pmap: *mut c_void,
) -> c_int {
if attr.is_null() || val.is_null() || pmap.is_null() {
return -1;
}
let attr = CStr::from_ptr(attr).to_string_lossy().to_string();
let val = CStr::from_ptr(val).to_string_lossy().to_string();
let map: &mut HashMap<String, String> = &mut *pmap.cast();
map.insert(attr, val);
0
}
#[derive(Debug, PartialEq)]
pub struct Version {
pub major: u32,
pub minor: u32,
pub git_tag: String,
}
impl fmt::Display for Version {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}.{} tag: {}", self.major, self.minor, self.git_tag)
}
}
pub fn library_version() -> Version {
let mut major: c_uint = 0;
let mut minor: c_uint = 0;
const BUF_SZ: usize = 8;
let mut buf = vec![' ' as c_char; BUF_SZ];
let pbuf = buf.as_mut_ptr();
unsafe { ffi::iio_library_get_version(&mut major, &mut minor, pbuf) };
let sgit = unsafe {
if buf.contains(&0) {
CStr::from_ptr(pbuf).to_owned()
}
else {
let slc = str::from_utf8(slice::from_raw_parts(pbuf.cast(), BUF_SZ)).unwrap();
CString::new(slc).unwrap()
}
};
Version {
major: major as u32,
minor: minor as u32,
git_tag: sgit.to_string_lossy().into_owned(),
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn version() {
let v1 = library_version();
let v2 = library_version();
assert!(v1 == v2);
}
#[test]
fn val_from_attr_str() {
let val: i32 = i32::from_attr("123").unwrap();
assert_eq!(val, 123);
let val = bool::from_attr("1").unwrap();
assert_eq!(val, true);
let val: bool = FromAttribute::from_attr(" 0 \n").unwrap();
assert_eq!(val, false);
let val: String = String::from_attr("hello").unwrap();
assert_eq!(&val, "hello");
}
#[test]
fn val_to_attr_string() {
let s = i32::to_attr(&123).unwrap();
assert_eq!(&s, "123");
let s = bool::to_attr(&true).unwrap();
assert_eq!(&s, "1");
let s = bool::to_attr(&false).unwrap();
assert_eq!(&s, "0");
let s = ToAttribute::to_attr("hello").unwrap();
assert_eq!(&s, "hello");
let s = String::to_attr(&"hello".to_string()).unwrap();
assert_eq!(s.as_str(), "hello");
}
}