/src/fontations/skera/src/offset_array.rs

Source
//! Subset arrays of offsets
use crate::{offset::SerializeSubset, Plan, SerializeErrorFlags, Serializer, SubsetTable};
use write_fonts::{
    read::{ArrayOfNullableOffsets, ArrayOfOffsets, FontReadWithArgs, Offset, ReadArgs, ReadError},
    types::{FixedSize, Scalar},
};

pub(crate) trait SubsetOffsetArray<'a, T: SubsetTable<'a>> {
    fn subset_offset(
        &self,
        idx: usize,
        s: &mut Serializer,
        plan: &Plan,
        args: T::ArgsForSubset,
    ) -> Result<(), SerializeErrorFlags>;
}

impl<'a, T, O> SubsetOffsetArray<'a, T> for ArrayOfOffsets<'a, T, O>
where
    O: Scalar + Offset + FixedSize + SerializeSubset,
    T: ReadArgs + FontReadWithArgs<'a> + SubsetTable<'a>,
    T::Args: Copy + 'static,
{
    fn subset_offset(
        &self,
        idx: usize,
        s: &mut Serializer,
        plan: &Plan,
        args: T::ArgsForSubset,
    ) -> Result<(), SerializeErrorFlags> {
        let t = match self.get(idx) {
            Err(ReadError::NullOffset) => return Err(SerializeErrorFlags::SERIALIZE_ERROR_EMPTY),
            Ok(table) => table,
            Err(_) => return Err(s.set_err(SerializeErrorFlags::SERIALIZE_ERROR_READ_ERROR)),
        };
        let snap = s.snapshot();
        let offset_pos = s.allocate_size(O::RAW_BYTE_LEN, true)?;

        if let Err(e) = O::serialize_subset(&t, s, plan, args, offset_pos) {
            s.revert_snapshot(snap);
            return Err(e);
        }

        Ok(())
    }
}

impl<'a, T, O> SubsetOffsetArray<'a, T> for ArrayOfNullableOffsets<'a, T, O>
where
    O: Scalar + Offset + FixedSize + SerializeSubset,
    T: ReadArgs + FontReadWithArgs<'a> + SubsetTable<'a>,
    T::Args: Copy + 'static,
{
    fn subset_offset(
        &self,
        idx: usize,
        s: &mut Serializer,
        plan: &Plan,
        args: T::ArgsForSubset,
    ) -> Result<(), SerializeErrorFlags> {
        match self.get(idx) {
            Some(Ok(t)) => {
                let snap = s.snapshot();
                let offset_pos = s.allocate_size(O::RAW_BYTE_LEN, true)?;

                match O::serialize_subset(&t, s, plan, args, offset_pos) {
                    Ok(_) => Ok(()),
                    Err(e) => {
                        s.revert_snapshot(snap);
                        Err(e)
                    }
                }
            }
            None => Err(SerializeErrorFlags::SERIALIZE_ERROR_EMPTY),
            Some(Err(_)) => Err(s.set_err(SerializeErrorFlags::SERIALIZE_ERROR_READ_ERROR)),
        }
    }
}

pub(crate) trait IterNullableHelper<'a, T> {
    fn iter_as_nullable(&self) -> impl Iterator<Item = Option<Result<T, ReadError>>> + 'a;
}

impl<'a, T, O> IterNullableHelper<'a, T> for ArrayOfOffsets<'a, T, O>
// these bounds have to match what is in the read-fonts impl block that has the normal `iter` method
where
    O: Scalar + Offset,
    T: ReadArgs + FontReadWithArgs<'a>,
    T::Args: Copy + 'static,
{
    fn iter_as_nullable(&self) -> impl Iterator<Item = Option<Result<T, ReadError>>> + 'a {
        self.iter().map(|off| match off {
            Err(ReadError::NullOffset) => None,
            other => Some(other),
        })
    }
}

Line	Count	Source
1		//! Subset arrays of offsets
2		use crate::{offset::SerializeSubset, Plan, SerializeErrorFlags, Serializer, SubsetTable};
3		use write_fonts::{
4		read::{ArrayOfNullableOffsets, ArrayOfOffsets, FontReadWithArgs, Offset, ReadArgs, ReadError},
5		types::{FixedSize, Scalar},
6		};
7
8		pub(crate) trait SubsetOffsetArray<'a, T: SubsetTable<'a>> {
9		fn subset_offset(
10		&self,
11		idx: usize,
12		s: &mut Serializer,
13		plan: &Plan,
14		args: T::ArgsForSubset,
15		) -> Result<(), SerializeErrorFlags>;
16		}
17
18		impl<'a, T, O> SubsetOffsetArray<'a, T> for ArrayOfOffsets<'a, T, O>
19		where
20		O: Scalar + Offset + FixedSize + SerializeSubset,
21		T: ReadArgs + FontReadWithArgs<'a> + SubsetTable<'a>,
22		T::Args: Copy + 'static,
23		{
24	0	fn subset_offset(
25	0	&self,
26	0	idx: usize,
27	0	s: &mut Serializer,
28	0	plan: &Plan,
29	0	args: T::ArgsForSubset,
30	0	) -> Result<(), SerializeErrorFlags> {
31	0	let t = match self.get(idx) {
32	0	Err(ReadError::NullOffset) => return Err(SerializeErrorFlags::SERIALIZE_ERROR_EMPTY),
33	0	Ok(table) => table,
34	0	Err(_) => return Err(s.set_err(SerializeErrorFlags::SERIALIZE_ERROR_READ_ERROR)),
35		};
36	0	let snap = s.snapshot();
37	0	let offset_pos = s.allocate_size(O::RAW_BYTE_LEN, true)?;
38
39	0	if let Err(e) = O::serialize_subset(&t, s, plan, args, offset_pos) {
40	0	s.revert_snapshot(snap);
41	0	return Err(e);
42	0	}
43
44	0	Ok(())
45	0	} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::colr::Paint, font_types::offset::Offset32> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::colr::Paint>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gdef::AttachPoint> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gdef::AttachPoint>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gdef::LigGlyph> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gdef::LigGlyph>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gpos::LigatureAttach> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gpos::LigatureAttach>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gpos::PositionLookup> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gpos::PositionLookup>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gpos::PairSet> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gpos::PairSet>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gsub::LigatureSet> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gsub::LigatureSet>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gsub::AlternateSet> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gsub::AlternateSet>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gsub::SubstitutionLookup> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gsub::SubstitutionLookup>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gsub::Sequence> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::gsub::Sequence>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::CoverageTable, font_types::offset::Offset32> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::layout::CoverageTable>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::Condition, font_types::offset::Offset32> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::layout::Condition>>::subset_offset
46		}
47
48		impl<'a, T, O> SubsetOffsetArray<'a, T> for ArrayOfNullableOffsets<'a, T, O>
49		where
50		O: Scalar + Offset + FixedSize + SerializeSubset,
51		T: ReadArgs + FontReadWithArgs<'a> + SubsetTable<'a>,
52		T::Args: Copy + 'static,
53		{
54	0	fn subset_offset(
55	0	&self,
56	0	idx: usize,
57	0	s: &mut Serializer,
58	0	plan: &Plan,
59	0	args: T::ArgsForSubset,
60	0	) -> Result<(), SerializeErrorFlags> {
61	0	match self.get(idx) {
62	0	Some(Ok(t)) => {
63	0	let snap = s.snapshot();
64	0	let offset_pos = s.allocate_size(O::RAW_BYTE_LEN, true)?;
65
66	0	match O::serialize_subset(&t, s, plan, args, offset_pos) {
67	0	Ok(_) => Ok(()),
68	0	Err(e) => {
69	0	s.revert_snapshot(snap);
70	0	Err(e)
71		}
72		}
73		}
74	0	None => Err(SerializeErrorFlags::SERIALIZE_ERROR_EMPTY),
75	0	Some(Err(_)) => Err(s.set_err(SerializeErrorFlags::SERIALIZE_ERROR_READ_ERROR)),
76		}
77	0	} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfNullableOffsets<read_fonts::tables::layout::SequenceRuleSet> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::layout::SequenceRuleSet>>::subset_offset Unexecuted instantiation: <read_fonts::offset_array::ArrayOfNullableOffsets<read_fonts::tables::layout::ChainedSequenceRuleSet> as skera::offset_array::SubsetOffsetArray<read_fonts::tables::layout::ChainedSequenceRuleSet>>::subset_offset
78		}
79
80		pub(crate) trait IterNullableHelper<'a, T> {
81		fn iter_as_nullable(&self) -> impl Iterator<Item = Option<Result<T, ReadError>>> + 'a;
82		}
83
84		impl<'a, T, O> IterNullableHelper<'a, T> for ArrayOfOffsets<'a, T, O>
85		// these bounds have to match what is in the read-fonts impl block that has the normal `iter` method
86		where
87		O: Scalar + Offset,
88		T: ReadArgs + FontReadWithArgs<'a>,
89		T::Args: Copy + 'static,
90		{
91	0	fn iter_as_nullable(&self) -> impl Iterator<Item = Option<Result<T, ReadError>>> + 'a {
92	0	self.iter().map(\|off\| match off {
93	0	Err(ReadError::NullOffset) => None,
94	0	other => Some(other),
95	0	}) Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::base::BaseCoord> as skera::offset_array::IterNullableHelper<read_fonts::tables::base::BaseCoord>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gdef::CaretValue> as skera::offset_array::IterNullableHelper<read_fonts::tables::gdef::CaretValue>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gdef::LigGlyph> as skera::offset_array::IterNullableHelper<read_fonts::tables::gdef::LigGlyph>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gsub::Ligature> as skera::offset_array::IterNullableHelper<read_fonts::tables::gsub::Ligature>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::SequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::SequenceRule>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::CoverageTable> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::CoverageTable>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::CoverageTable, font_types::offset::Offset32> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::CoverageTable>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::ClassSequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::ClassSequenceRule>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::ChainedSequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::ChainedSequenceRule>>::iter_as_nullable::{closure#0} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::ChainedClassSequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::ChainedClassSequenceRule>>::iter_as_nullable::{closure#0}
96	0	} Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::base::BaseCoord> as skera::offset_array::IterNullableHelper<read_fonts::tables::base::BaseCoord>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gdef::CaretValue> as skera::offset_array::IterNullableHelper<read_fonts::tables::gdef::CaretValue>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gdef::LigGlyph> as skera::offset_array::IterNullableHelper<read_fonts::tables::gdef::LigGlyph>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::gsub::Ligature> as skera::offset_array::IterNullableHelper<read_fonts::tables::gsub::Ligature>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::SequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::SequenceRule>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::CoverageTable> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::CoverageTable>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::CoverageTable, font_types::offset::Offset32> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::CoverageTable>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::ClassSequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::ClassSequenceRule>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::ChainedSequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::ChainedSequenceRule>>::iter_as_nullable Unexecuted instantiation: <read_fonts::offset_array::ArrayOfOffsets<read_fonts::tables::layout::ChainedClassSequenceRule> as skera::offset_array::IterNullableHelper<read_fonts::tables::layout::ChainedClassSequenceRule>>::iter_as_nullable
97		}

Coverage Report

Created: 2026-05-24 07:46