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use crate::error::Error;
use core::{fmt, str::FromStr};
#[cfg(feature = "serde")]
use serde::{de, de::Error as DeError, ser, Deserialize, Serialize};
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
#[non_exhaustive]
pub enum PointerWidth {
U16,
U32,
U64,
}
impl PointerWidth {
pub fn as_str(self) -> &'static str {
match self {
PointerWidth::U16 => "16",
PointerWidth::U32 => "32",
PointerWidth::U64 => "64",
}
}
}
impl FromStr for PointerWidth {
type Err = Error;
fn from_str(name: &str) -> Result<Self, Self::Err> {
let result = match name {
"16" => PointerWidth::U16,
"32" => PointerWidth::U32,
"64" => PointerWidth::U64,
_ => return Err(Error),
};
Ok(result)
}
}
use core::convert::TryFrom;
impl TryFrom<u8> for PointerWidth {
type Error = &'static str;
fn try_from(value: u8) -> Result<Self, Self::Error> {
match value {
64 => Ok(PointerWidth::U64),
32 => Ok(PointerWidth::U32),
16 => Ok(PointerWidth::U16),
_ => Err("Invalid pointer width!"),
}
}
}
impl From<PointerWidth> for u8 {
fn from(value: PointerWidth) -> Self {
match value {
PointerWidth::U64 => 64,
PointerWidth::U32 => 32,
PointerWidth::U16 => 16,
}
}
}
impl fmt::Display for PointerWidth {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(self.as_str())
}
}
#[cfg(feature = "serde")]
impl Serialize for PointerWidth {
fn serialize<S: ser::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
serializer.serialize_str(self.as_str())
}
}
#[cfg(all(feature = "serde", feature = "std"))]
impl<'de> Deserialize<'de> for PointerWidth {
fn deserialize<D: de::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
let string = std::string::String::deserialize(deserializer)?;
string.parse().map_err(|_| {
D::Error::custom(std::format!(
"Unrecognized value '{}' for target_pointer_width",
string
))
})
}
}