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use std::io;
use crate::pull_parser::{v7400::LoadAttribute, Result};
#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct PrimitiveLoader<T>(std::marker::PhantomData<T>);
macro_rules! impl_load_attribute_for_primitives {
($ty:ty, $method_name:ident, $expecting_type:expr) => {
impl LoadAttribute for PrimitiveLoader<$ty> {
type Output = $ty;
fn expecting(&self) -> String {
$expecting_type.into()
}
fn $method_name(self, v: $ty) -> Result<Self::Output> {
Ok(v)
}
}
};
}
impl_load_attribute_for_primitives!(bool, load_bool, "single boolean");
impl_load_attribute_for_primitives!(i16, load_i16, "single i16");
impl_load_attribute_for_primitives!(i32, load_i32, "single i32");
impl_load_attribute_for_primitives!(i64, load_i64, "single i64");
impl_load_attribute_for_primitives!(f32, load_f32, "single f32");
impl_load_attribute_for_primitives!(f64, load_f64, "single f64");
#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct ArrayLoader<T>(std::marker::PhantomData<T>);
macro_rules! impl_load_attribute_for_arrays {
($ty:ty, $method_name:ident, $expecting_type:expr) => {
impl LoadAttribute for ArrayLoader<Vec<$ty>> {
type Output = Vec<$ty>;
fn expecting(&self) -> String {
$expecting_type.into()
}
fn $method_name(
self,
iter: impl Iterator<Item = Result<$ty>>,
_: usize,
) -> Result<Self::Output> {
iter.collect::<Result<_>>()
}
}
};
}
impl_load_attribute_for_arrays!(bool, load_seq_bool, "boolean array");
impl_load_attribute_for_arrays!(i32, load_seq_i32, "i32 array");
impl_load_attribute_for_arrays!(i64, load_seq_i64, "i64 array");
impl_load_attribute_for_arrays!(f32, load_seq_f32, "f32 array");
impl_load_attribute_for_arrays!(f64, load_seq_f64, "f64 array");
#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct BinaryLoader;
impl LoadAttribute for BinaryLoader {
type Output = Vec<u8>;
fn expecting(&self) -> String {
"binary".into()
}
fn load_binary(self, mut reader: impl io::Read, len: u64) -> Result<Self::Output> {
let mut buf = Vec::with_capacity(len as usize);
reader.read_to_end(&mut buf)?;
Ok(buf)
}
}
#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct StringLoader;
impl LoadAttribute for StringLoader {
type Output = String;
fn expecting(&self) -> String {
"string".into()
}
fn load_string(self, mut reader: impl io::Read, len: u64) -> Result<Self::Output> {
let mut buf = String::with_capacity(len as usize);
reader.read_to_string(&mut buf)?;
Ok(buf)
}
}