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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| use crate::xetex_ini::MEM; | ||
| fn next<'a>(p: &'a i32) -> &'a i32 { | ||
| unsafe { &MEM[(*p as usize)].b32.s1 } | ||
| } | ||
|
|
||
| use crate::xetex_xetexd::{TeXInt, TeXOpt}; | ||
| pub struct NodeList<'a>(&'a mut i32); | ||
| impl<'a> NodeList<'a> { | ||
| pub fn from(p: &'a mut i32) -> Self { | ||
| Self(p) | ||
| } | ||
| pub fn ptr(&self) -> Option<usize> { | ||
| self.0.opt() | ||
| } | ||
| pub fn iter(&self) -> Iter<'_> { | ||
| Iter::new(self.0) | ||
| } | ||
| pub fn iter_mut(&mut self) -> IterMut { | ||
| IterMut::new(&mut self.0) | ||
| } | ||
| pub fn tail(&self) -> Option<usize> { | ||
| self.iter().last() | ||
| } | ||
| pub fn is_empty(&self) -> bool { | ||
| self.ptr().is_none() | ||
| } | ||
| pub fn len(&self) -> usize { | ||
| self.iter().count() | ||
| } | ||
| pub fn push(&mut self, p: usize) -> usize { | ||
| if let Some(tail) = self.iter_mut().last() { | ||
| unsafe { MEM[tail].b32.s1 = Some(p).tex_int() } | ||
| } else { | ||
| *self.0 = Some(p).tex_int() | ||
| } | ||
| p | ||
| } | ||
| } | ||
|
|
||
| impl<'a> IntoIterator for &'a NodeList<'a> { | ||
| type Item = usize; | ||
| type IntoIter = Iter<'a>; | ||
|
|
||
| fn into_iter(self) -> Self::IntoIter { | ||
| self.iter() | ||
| } | ||
| } | ||
|
|
||
| pub struct Iter<'a>(&'a i32); | ||
|
|
||
| impl<'a> Iter<'a> { | ||
| fn new(p: &'a i32) -> Self { | ||
| Self(p) | ||
| } | ||
| } | ||
|
|
||
| impl<'a> std::iter::Iterator for Iter<'a> { | ||
| type Item = usize; | ||
| fn next(&mut self) -> Option<Self::Item> { | ||
| if let Some(p) = self.0.opt() { | ||
| self.0 = next(self.0); | ||
| Some(p) | ||
| } else { | ||
| None | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl<'a> IntoIterator for &'a mut NodeList<'a> { | ||
| type Item = usize; | ||
| type IntoIter = IterMut<'a>; | ||
|
|
||
| fn into_iter(self) -> Self::IntoIter { | ||
| self.iter_mut() | ||
| } | ||
| } | ||
|
|
||
| pub struct IterMut<'a>(&'a i32); | ||
|
|
||
| impl<'a> IterMut<'a> { | ||
| fn new(p: &'a mut i32) -> Self { | ||
| Self(p) | ||
| } | ||
| } | ||
|
|
||
| impl<'a> std::iter::Iterator for IterMut<'a> { | ||
| type Item = usize; | ||
| fn next(&mut self) -> Option<Self::Item> { | ||
| if let Some(p) = self.0.opt() { | ||
| self.0 = next(self.0); | ||
| Some(p) | ||
| } else { | ||
| None | ||
| } | ||
| } | ||
| } |
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