read-fonts 0.46.0

// THIS FILE IS AUTOGENERATED.
// Any changes to this file will be overwritten.
// For more information about how codegen works, see font-codegen/README.md

#[allow(unused_imports)]
use crate::codegen_prelude::*;

impl<'a> MinByteRange<'a> for Hdmx<'a> {
    fn min_byte_range(&self) -> Range<usize> {
        0..self.records_byte_range().end
    }
    fn min_table_bytes(&self) -> &'a [u8] {
        let range = self.min_byte_range();
        self.offset_data().as_bytes().get(range).unwrap_or_default()
    }
}

impl TopLevelTable for Hdmx<'_> {
    /// `hdmx`
    const TAG: Tag = Tag::new(b"hdmx");
}

impl ReadArgs for Hdmx<'_> {
    type Args = u32;
}

impl<'a> FontRead<'a> for Hdmx<'a> {
    fn read_with_args(data: FontData<'a>, args: u32) -> Result<Self, ReadError> {
        let num_glyphs = args;

        #[allow(clippy::absurd_extreme_comparisons)]
        if data.len() < Self::MIN_SIZE {
            return Err(ReadError::OutOfBounds);
        }
        let Some(data) = TableDataRef::new(data.as_bytes()) else {
            return Err(ReadError::OutOfBounds);
        };
        Ok(Self { data, num_glyphs })
    }
}

impl<'a> Hdmx<'a> {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(data: FontData<'a>, num_glyphs: u32) -> Result<Self, ReadError> {
        let args = num_glyphs;
        Self::read_with_args(data, args)
    }
}

/// The fields at the start of the table, which are read directly.
#[derive(Clone, Copy, bytemuck :: AnyBitPattern)]
#[repr(C, packed)]
#[doc(hidden)]
pub struct HdmxFixedHeader {
    pub version: BigEndian<u16>,
    pub num_records: BigEndian<u16>,
    pub size_device_record: BigEndian<u32>,
}

#[allow(clippy::absurd_extreme_comparisons)]
const _: () = assert!(std::mem::size_of::<HdmxFixedHeader>() <= Hdmx::MIN_SIZE);

/// The [Horizontal Device Metrics](https://learn.microsoft.com/en-us/typography/opentype/spec/hdmx) table.
#[derive(Clone)]
pub struct Hdmx<'a> {
    data: TableDataRef<'a, HdmxFixedHeader>,
    num_glyphs: u32,
}

#[allow(clippy::needless_lifetimes)]
impl<'a> Hdmx<'a> {
    pub const MIN_SIZE: usize = (u16::RAW_BYTE_LEN + u16::RAW_BYTE_LEN + u32::RAW_BYTE_LEN);
    basic_table_impls!(impl_the_methods);

    /// Table version number (set to 0).
    pub fn version(&self) -> u16 {
        self.data.header().version.get()
    }

    /// Number of device records.
    pub fn num_records(&self) -> u16 {
        self.data.header().num_records.get()
    }

    /// Size of device record, 32-bit aligned.
    pub fn size_device_record(&self) -> u32 {
        self.data.header().size_device_record.get()
    }

    /// Array of device records.
    pub fn records(&self) -> ComputedArray<'a, DeviceRecord<'a>> {
        let range = self.records_byte_range();
        ComputedArray::new(
            self.offset_data(),
            range,
            (self.num_glyphs(), self.size_device_record()),
        )
        .unwrap_or_default()
    }

    pub(crate) fn num_glyphs(&self) -> u32 {
        self.num_glyphs
    }

    pub fn version_byte_range(&self) -> Range<usize> {
        let start = 0;
        let end = start + u16::RAW_BYTE_LEN;
        start..end
    }

    pub fn num_records_byte_range(&self) -> Range<usize> {
        let start = self.version_byte_range().end;
        let end = start + u16::RAW_BYTE_LEN;
        start..end
    }

    pub fn size_device_record_byte_range(&self) -> Range<usize> {
        let start = self.num_records_byte_range().end;
        let end = start + u32::RAW_BYTE_LEN;
        start..end
    }

    pub fn records_byte_range(&self) -> Range<usize> {
        let num_records = self.num_records();
        let start = self.size_device_record_byte_range().end;
        let end = start
            + (transforms::to_usize(num_records)).saturating_mul(
                <DeviceRecord as ComputeSize>::compute_size((
                    self.num_glyphs(),
                    self.size_device_record(),
                ))
                .unwrap_or(0),
            );
        start..end
    }
}

const _: () = assert!(FontData::default_data_long_enough(Hdmx::MIN_SIZE));

impl Default for Hdmx<'_> {
    fn default() -> Self {
        Self {
            data: TableDataRef::new(FontData::default_table_data().as_bytes())
                .unwrap_or_else(|| unreachable!("the default data covers MIN_SIZE")),
            num_glyphs: Default::default(),
        }
    }
}