/rust/registry/src/index.crates.io-1949cf8c6b5b557f/read-fonts-0.46.0/generated/font.rs

Source
// 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 TableDirectory<'a> {
    fn min_byte_range(&self) -> Range<usize> {
        0..self.table_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 ReadArgs for TableDirectory<'_> {
    type Args = ();
}

impl<'a> FontRead<'a> for TableDirectory<'a> {
    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
        #[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 })
    }
}

/// The fields at the start of the table, which are read directly.
#[derive(Clone, Copy, bytemuck :: AnyBitPattern)]
#[repr(C, packed)]
#[doc(hidden)]
pub struct TableDirectoryFixedHeader {
    pub sfnt_version: BigEndian<u32>,
    pub num_tables: BigEndian<u16>,
    pub search_range: BigEndian<u16>,
    pub entry_selector: BigEndian<u16>,
    pub range_shift: BigEndian<u16>,
}

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

/// The OpenType [Table Directory](https://docs.microsoft.com/en-us/typography/opentype/spec/otff#table-directory)
#[derive(Clone)]
pub struct TableDirectory<'a> {
    data: TableDataRef<'a, TableDirectoryFixedHeader>,
}

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

    /// 0x00010000 or 0x4F54544F
    pub fn sfnt_version(&self) -> u32 {
        self.data.header().sfnt_version.get()
    }

    /// Number of tables.
    pub fn num_tables(&self) -> u16 {
        self.data.header().num_tables.get()
    }

    pub fn search_range(&self) -> u16 {
        self.data.header().search_range.get()
    }

    pub fn entry_selector(&self) -> u16 {
        self.data.header().entry_selector.get()
    }

    pub fn range_shift(&self) -> u16 {
        self.data.header().range_shift.get()
    }

    /// Table records array—one for each top-level table in the font
    pub fn table_records(&self) -> &'a [TableRecord] {
        let range = self.table_records_byte_range();
        self.offset_data()
            .read_array(range)
            .ok()
            .unwrap_or_default()
    }

    pub fn sfnt_version_byte_range(&self) -> Range<usize> {
        let start = 0;
        let end = start + u32::RAW_BYTE_LEN;
        start..end
    }

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

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

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

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

    pub fn table_records_byte_range(&self) -> Range<usize> {
        let num_tables = self.num_tables();
        let start = self.range_shift_byte_range().end;
        let end =
            start + (transforms::to_usize(num_tables)).saturating_mul(TableRecord::RAW_BYTE_LEN);
        start..end
    }
}

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

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

/// Record for a table in a font.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct TableRecord {
    /// Table identifier.
    pub tag: BigEndian<Tag>,
    /// Checksum for the table.
    pub checksum: BigEndian<u32>,
    /// Offset from the beginning of the font data.
    pub offset: BigEndian<u32>,
    /// Length of the table.
    pub length: BigEndian<u32>,
}

impl TableRecord {
    /// Table identifier.
    pub fn tag(&self) -> Tag {
        self.tag.get()
    }

    /// Checksum for the table.
    pub fn checksum(&self) -> u32 {
        self.checksum.get()
    }

    /// Offset from the beginning of the font data.
    pub fn offset(&self) -> u32 {
        self.offset.get()
    }

    /// Length of the table.
    pub fn length(&self) -> u32 {
        self.length.get()
    }
}

impl FixedSize for TableRecord {
    const RAW_BYTE_LEN: usize =
        Tag::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN;
}

impl<'a> MinByteRange<'a> for TTCHeader<'a> {
    fn min_byte_range(&self) -> Range<usize> {
        0..self.table_directory_offsets_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 ReadArgs for TTCHeader<'_> {
    type Args = ();
}

impl<'a> FontRead<'a> for TTCHeader<'a> {
    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
        #[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 })
    }
}

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

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

/// [TTC Header](https://learn.microsoft.com/en-us/typography/opentype/spec/otff#ttc-header)
#[derive(Clone)]
pub struct TTCHeader<'a> {
    data: TableDataRef<'a, TTCHeaderFixedHeader>,
}

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

    /// Font Collection ID string: \"ttcf\"
    pub fn ttc_tag(&self) -> Tag {
        self.data.header().ttc_tag.get()
    }

    /// Major/minor version of the TTC Header
    pub fn version(&self) -> MajorMinor {
        self.data.header().version.get()
    }

    /// Number of fonts in TTC
    pub fn num_fonts(&self) -> u32 {
        self.data.header().num_fonts.get()
    }

    /// Array of offsets to the TableDirectory for each font from the beginning of the file
    pub fn table_directory_offsets(&self) -> &'a [BigEndian<u32>] {
        let range = self.table_directory_offsets_byte_range();
        self.offset_data()
            .read_array(range)
            .ok()
            .unwrap_or_default()
    }

    /// Tag indicating that a DSIG table exists, 0x44534947 ('DSIG') (null if no signature)
    pub fn dsig_tag(&self) -> Option<u32> {
        let range = self.dsig_tag_byte_range();
        (!range.is_empty())
            .then(|| self.offset_data().read_at(range.start).ok())
            .flatten()
    }

    /// The length (in bytes) of the DSIG table (null if no signature)
    pub fn dsig_length(&self) -> Option<u32> {
        let range = self.dsig_length_byte_range();
        (!range.is_empty())
            .then(|| self.offset_data().read_at(range.start).ok())
            .flatten()
    }

    /// The offset (in bytes) of the DSIG table from the beginning of the TTC file (null if no signature)
    pub fn dsig_offset(&self) -> Option<u32> {
        let range = self.dsig_offset_byte_range();
        (!range.is_empty())
            .then(|| self.offset_data().read_at(range.start).ok())
            .flatten()
    }

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

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

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

    pub fn table_directory_offsets_byte_range(&self) -> Range<usize> {
        let num_fonts = self.num_fonts();
        let start = self.num_fonts_byte_range().end;
        let end = start + (transforms::to_usize(num_fonts)).saturating_mul(u32::RAW_BYTE_LEN);
        start..end
    }

    pub fn dsig_tag_byte_range(&self) -> Range<usize> {
        let start = self.table_directory_offsets_byte_range().end;
        let end = if self.version().compatible((2u16, 0u16)) {
            start + u32::RAW_BYTE_LEN
        } else {
            start
        };
        start..end
    }

    pub fn dsig_length_byte_range(&self) -> Range<usize> {
        let start = self.dsig_tag_byte_range().end;
        let end = if self.version().compatible((2u16, 0u16)) {
            start + u32::RAW_BYTE_LEN
        } else {
            start
        };
        start..end
    }

    pub fn dsig_offset_byte_range(&self) -> Range<usize> {
        let start = self.dsig_length_byte_range().end;
        let end = if self.version().compatible((2u16, 0u16)) {
            start + u32::RAW_BYTE_LEN
        } else {
            start
        };
        start..end
    }
}

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

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

Coverage Report

Created: 2026-10-24 07:19

Line	Count	Source
1		// THIS FILE IS AUTOGENERATED.
2		// Any changes to this file will be overwritten.
3		// For more information about how codegen works, see font-codegen/README.md
4
5		#[allow(unused_imports)]
6		use crate::codegen_prelude::*;
7
8		impl<'a> MinByteRange<'a> for TableDirectory<'a> {
9	0	fn min_byte_range(&self) -> Range<usize> {
10	0	0..self.table_records_byte_range().end
11	0	}
12	0	fn min_table_bytes(&self) -> &'a [u8] {
13	0	let range = self.min_byte_range();
14	0	self.offset_data().as_bytes().get(range).unwrap_or_default()
15	0	}
16		}
17
18		impl ReadArgs for TableDirectory<'_> {
19		type Args = ();
20		}
21
22		impl<'a> FontRead<'a> for TableDirectory<'a> {
23	77.4k	fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
24		#[allow(clippy::absurd_extreme_comparisons)]
25	77.4k	if data.len() < Self::MIN_SIZE {
26	240	return Err(ReadError::OutOfBounds);
27	77.2k	}
28	77.2k	let Some(data) = TableDataRef::new(data.as_bytes()) else {
29	0	return Err(ReadError::OutOfBounds);
30		};
31	77.2k	Ok(Self { data })
32	77.4k	}
33		}
34
35		/// The fields at the start of the table, which are read directly.
36		#[derive(Clone, Copy, bytemuck :: AnyBitPattern)]
37		#[repr(C, packed)]
38		#[doc(hidden)]
39		pub struct TableDirectoryFixedHeader {
40		pub sfnt_version: BigEndian<u32>,
41		pub num_tables: BigEndian<u16>,
42		pub search_range: BigEndian<u16>,
43		pub entry_selector: BigEndian<u16>,
44		pub range_shift: BigEndian<u16>,
45		}
46
47		#[allow(clippy::absurd_extreme_comparisons)]
48		const _: () = assert!(std::mem::size_of::<TableDirectoryFixedHeader>() <= TableDirectory::MIN_SIZE);
49
50		/// The OpenType [Table Directory](https://docs.microsoft.com/en-us/typography/opentype/spec/otff#table-directory)
51		#[derive(Clone)]
52		pub struct TableDirectory<'a> {
53		data: TableDataRef<'a, TableDirectoryFixedHeader>,
54		}
55
56		#[allow(clippy::needless_lifetimes)]
57		impl<'a> TableDirectory<'a> {
58		pub const MIN_SIZE: usize = (u32::RAW_BYTE_LEN
59		+ u16::RAW_BYTE_LEN
60		+ u16::RAW_BYTE_LEN
61		+ u16::RAW_BYTE_LEN
62		+ u16::RAW_BYTE_LEN);
63		basic_table_impls!(impl_the_methods);
64
65		/// 0x00010000 or 0x4F54544F
66	88.9k	pub fn sfnt_version(&self) -> u32 {
67	88.9k	self.data.header().sfnt_version.get()
68	88.9k	}
69
70		/// Number of tables.
71	164k	pub fn num_tables(&self) -> u16 {
72	164k	self.data.header().num_tables.get()
73	164k	}
74
75	0	pub fn search_range(&self) -> u16 {
76	0	self.data.header().search_range.get()
77	0	}
78
79	0	pub fn entry_selector(&self) -> u16 {
80	0	self.data.header().entry_selector.get()
81	0	}
82
83	0	pub fn range_shift(&self) -> u16 {
84	0	self.data.header().range_shift.get()
85	0	}
86
87		/// Table records array—one for each top-level table in the font
88	164k	pub fn table_records(&self) -> &'a [TableRecord] {
89	164k	let range = self.table_records_byte_range();
90	164k	self.offset_data()
91	164k	.read_array(range)
92	164k	.ok()
93	164k	.unwrap_or_default()
94	164k	}
95
96	164k	pub fn sfnt_version_byte_range(&self) -> Range<usize> {
97	164k	let start = 0;
98	164k	let end = start + u32::RAW_BYTE_LEN;
99	164k	start..end
100	164k	}
101
102	164k	pub fn num_tables_byte_range(&self) -> Range<usize> {
103	164k	let start = self.sfnt_version_byte_range().end;
104	164k	let end = start + u16::RAW_BYTE_LEN;
105	164k	start..end
106	164k	}
107
108	164k	pub fn search_range_byte_range(&self) -> Range<usize> {
109	164k	let start = self.num_tables_byte_range().end;
110	164k	let end = start + u16::RAW_BYTE_LEN;
111	164k	start..end
112	164k	}
113
114	164k	pub fn entry_selector_byte_range(&self) -> Range<usize> {
115	164k	let start = self.search_range_byte_range().end;
116	164k	let end = start + u16::RAW_BYTE_LEN;
117	164k	start..end
118	164k	}
119
120	164k	pub fn range_shift_byte_range(&self) -> Range<usize> {
121	164k	let start = self.entry_selector_byte_range().end;
122	164k	let end = start + u16::RAW_BYTE_LEN;
123	164k	start..end
124	164k	}
125
126	164k	pub fn table_records_byte_range(&self) -> Range<usize> {
127	164k	let num_tables = self.num_tables();
128	164k	let start = self.range_shift_byte_range().end;
129	164k	let end =
130	164k	start + (transforms::to_usize(num_tables)).saturating_mul(TableRecord::RAW_BYTE_LEN);
131	164k	start..end
132	164k	}
133		}
134
135		const _: () = assert!(FontData::default_data_long_enough(TableDirectory::MIN_SIZE));
136
137		impl Default for TableDirectory<'_> {
138	0	fn default() -> Self {
139		Self {
140	0	data: TableDataRef::new(FontData::default_table_data().as_bytes())
141	0	.unwrap_or_else(\|\| unreachable!("the default data covers MIN_SIZE")),
142		}
143	0	}
144		}
145
146		/// Record for a table in a font.
147		#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
148		#[repr(C)]
149		#[repr(packed)]
150		pub struct TableRecord {
151		/// Table identifier.
152		pub tag: BigEndian<Tag>,
153		/// Checksum for the table.
154		pub checksum: BigEndian<u32>,
155		/// Offset from the beginning of the font data.
156		pub offset: BigEndian<u32>,
157		/// Length of the table.
158		pub length: BigEndian<u32>,
159		}
160
161		impl TableRecord {
162		/// Table identifier.
163	7.14M	pub fn tag(&self) -> Tag {
164	7.14M	self.tag.get()
165	7.14M	}
166
167		/// Checksum for the table.
168	0	pub fn checksum(&self) -> u32 {
169	0	self.checksum.get()
170	0	}
171
172		/// Offset from the beginning of the font data.
173	55.4k	pub fn offset(&self) -> u32 {
174	55.4k	self.offset.get()
175	55.4k	}
176
177		/// Length of the table.
178	55.4k	pub fn length(&self) -> u32 {
179	55.4k	self.length.get()
180	55.4k	}
181		}
182
183		impl FixedSize for TableRecord {
184		const RAW_BYTE_LEN: usize =
185		Tag::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN;
186		}
187
188		impl<'a> MinByteRange<'a> for TTCHeader<'a> {
189	0	fn min_byte_range(&self) -> Range<usize> {
190	0	0..self.table_directory_offsets_byte_range().end
191	0	}
192	0	fn min_table_bytes(&self) -> &'a [u8] {
193	0	let range = self.min_byte_range();
194	0	self.offset_data().as_bytes().get(range).unwrap_or_default()
195	0	}
196		}
197
198		impl ReadArgs for TTCHeader<'_> {
199		type Args = ();
200		}
201
202		impl<'a> FontRead<'a> for TTCHeader<'a> {
203	64.8k	fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
204		#[allow(clippy::absurd_extreme_comparisons)]
205	64.8k	if data.len() < Self::MIN_SIZE {
206	29	return Err(ReadError::OutOfBounds);
207	64.8k	}
208	64.8k	let Some(data) = TableDataRef::new(data.as_bytes()) else {
209	0	return Err(ReadError::OutOfBounds);
210		};
211	64.8k	Ok(Self { data })
212	64.8k	}
213		}
214
215		/// The fields at the start of the table, which are read directly.
216		#[derive(Clone, Copy, bytemuck :: AnyBitPattern)]
217		#[repr(C, packed)]
218		#[doc(hidden)]
219		pub struct TTCHeaderFixedHeader {
220		pub ttc_tag: BigEndian<Tag>,
221		pub version: BigEndian<MajorMinor>,
222		pub num_fonts: BigEndian<u32>,
223		}
224
225		#[allow(clippy::absurd_extreme_comparisons)]
226		const _: () = assert!(std::mem::size_of::<TTCHeaderFixedHeader>() <= TTCHeader::MIN_SIZE);
227
228		/// [TTC Header](https://learn.microsoft.com/en-us/typography/opentype/spec/otff#ttc-header)
229		#[derive(Clone)]
230		pub struct TTCHeader<'a> {
231		data: TableDataRef<'a, TTCHeaderFixedHeader>,
232		}
233
234		#[allow(clippy::needless_lifetimes)]
235		impl<'a> TTCHeader<'a> {
236		pub const MIN_SIZE: usize = (Tag::RAW_BYTE_LEN + MajorMinor::RAW_BYTE_LEN + u32::RAW_BYTE_LEN);
237		basic_table_impls!(impl_the_methods);
238
239		/// Font Collection ID string: \"ttcf\"
240	129k	pub fn ttc_tag(&self) -> Tag {
241	129k	self.data.header().ttc_tag.get()
242	129k	}
243
244		/// Major/minor version of the TTC Header
245	279	pub fn version(&self) -> MajorMinor {
246	279	self.data.header().version.get()
247	279	}
248
249		/// Number of fonts in TTC
250	279	pub fn num_fonts(&self) -> u32 {
251	279	self.data.header().num_fonts.get()
252	279	}
253
254		/// Array of offsets to the TableDirectory for each font from the beginning of the file
255	0	pub fn table_directory_offsets(&self) -> &'a [BigEndian<u32>] {
256	0	let range = self.table_directory_offsets_byte_range();
257	0	self.offset_data()
258	0	.read_array(range)
259	0	.ok()
260	0	.unwrap_or_default()
261	0	}
262
263		/// Tag indicating that a DSIG table exists, 0x44534947 ('DSIG') (null if no signature)
264	0	pub fn dsig_tag(&self) -> Option<u32> {
265	0	let range = self.dsig_tag_byte_range();
266	0	(!range.is_empty())
267	0	.then(\|\| self.offset_data().read_at(range.start).ok())
268	0	.flatten()
269	0	}
270
271		/// The length (in bytes) of the DSIG table (null if no signature)
272	0	pub fn dsig_length(&self) -> Option<u32> {
273	0	let range = self.dsig_length_byte_range();
274	0	(!range.is_empty())
275	0	.then(\|\| self.offset_data().read_at(range.start).ok())
276	0	.flatten()
277	0	}
278
279		/// The offset (in bytes) of the DSIG table from the beginning of the TTC file (null if no signature)
280	0	pub fn dsig_offset(&self) -> Option<u32> {
281	0	let range = self.dsig_offset_byte_range();
282	0	(!range.is_empty())
283	0	.then(\|\| self.offset_data().read_at(range.start).ok())
284	0	.flatten()
285	0	}
286
287	0	pub fn ttc_tag_byte_range(&self) -> Range<usize> {
288	0	let start = 0;
289	0	let end = start + Tag::RAW_BYTE_LEN;
290	0	start..end
291	0	}
292
293	0	pub fn version_byte_range(&self) -> Range<usize> {
294	0	let start = self.ttc_tag_byte_range().end;
295	0	let end = start + MajorMinor::RAW_BYTE_LEN;
296	0	start..end
297	0	}
298
299	0	pub fn num_fonts_byte_range(&self) -> Range<usize> {
300	0	let start = self.version_byte_range().end;
301	0	let end = start + u32::RAW_BYTE_LEN;
302	0	start..end
303	0	}
304
305	0	pub fn table_directory_offsets_byte_range(&self) -> Range<usize> {
306	0	let num_fonts = self.num_fonts();
307	0	let start = self.num_fonts_byte_range().end;
308	0	let end = start + (transforms::to_usize(num_fonts)).saturating_mul(u32::RAW_BYTE_LEN);
309	0	start..end
310	0	}
311
312	0	pub fn dsig_tag_byte_range(&self) -> Range<usize> {
313	0	let start = self.table_directory_offsets_byte_range().end;
314	0	let end = if self.version().compatible((2u16, 0u16)) {
315	0	start + u32::RAW_BYTE_LEN
316		} else {
317	0	start
318		};
319	0	start..end
320	0	}
321
322	0	pub fn dsig_length_byte_range(&self) -> Range<usize> {
323	0	let start = self.dsig_tag_byte_range().end;
324	0	let end = if self.version().compatible((2u16, 0u16)) {
325	0	start + u32::RAW_BYTE_LEN
326		} else {
327	0	start
328		};
329	0	start..end
330	0	}
331
332	0	pub fn dsig_offset_byte_range(&self) -> Range<usize> {
333	0	let start = self.dsig_length_byte_range().end;
334	0	let end = if self.version().compatible((2u16, 0u16)) {
335	0	start + u32::RAW_BYTE_LEN
336		} else {
337	0	start
338		};
339	0	start..end
340	0	}
341		}
342
343		const _: () = assert!(FontData::default_data_long_enough(TTCHeader::MIN_SIZE));
344
345		impl Default for TTCHeader<'_> {
346	0	fn default() -> Self {
347		Self {
348	0	data: TableDataRef::new(FontData::default_table_data().as_bytes())
349	0	.unwrap_or_else(\|\| unreachable!("the default data covers MIN_SIZE")),
350		}
351	0	}
352		}