26 lines
901 B
Rust
26 lines
901 B
Rust
use std::marker::PhantomData;
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use ebml::FromEbml;
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use webm::WebmElement;
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pub struct EbmlIterator<'a, T: FromEbml<'a>>(&'a [u8], PhantomData<fn() -> T>);
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pub fn ebml_iter<'a, T: FromEbml<'a>>(source: &'a [u8])-> EbmlIterator<'a, T> {
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EbmlIterator(source, PhantomData)
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}
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impl<'a, T: FromEbml<'a>> Iterator for EbmlIterator<'a, T> {
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type Item = WebmElement<'a>;
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fn next(&mut self) -> Option<WebmElement<'a>> {
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WebmElement::check_space(self.0).unwrap_or(None).and_then(|element_size| {
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let (element_data, rest) = self.0.split_at(element_size);
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self.0 = rest;
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match WebmElement::decode_element(element_data) {
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Err(_) => None,
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Ok(None) => panic!("Buffer was supposed to have enough data to parse element, somehow did not."),
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Ok(Some((element, _))) => Some(element)
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}
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})
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}
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}
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