Enum DataType 

pub enum DataType {
    FixedPoint {
        size: u32,
        signed: bool,
        byte_order: ByteOrder,
        bit_offset: u16,
        bit_precision: u16,
    },
    FloatingPoint {
        size: u32,
        byte_order: ByteOrder,
        bit_offset: u16,
        bit_precision: u16,
        exponent_location: u8,
        exponent_size: u8,
        mantissa_location: u8,
        mantissa_size: u8,
        exponent_bias: u32,
    },
    String {
        size: u32,
        padding: StringPadding,
        charset: Charset,
    },
    Compound {
        size: u32,
        fields: Vec<CompoundField>,
    },
    Enum {
        size: u32,
        base_type: Box<DataType>,
        members: Vec<(String, Vec<u8>)>,
    },
    VarLen {
        base_type: Box<DataType>,
        is_string: bool,
    },
    Array {
        base_type: Box<DataType>,
        dimensions: Vec<u32>,
    },
    Opaque {
        size: u32,
        tag: String,
    },
    Bitfield {
        size: u32,
        byte_order: ByteOrder,
        bit_offset: u16,
        bit_precision: u16,
    },
    Reference {
        size: u32,
        ref_type: u8,
    },
}

HDF5 data type descriptor.

Parsed from the Datatype message (0x0003) in object headers.

Variants

FixedPoint

Fixed-point integers (signed/unsigned, various sizes).

Fields

size: u32

Total size in bytes.

signed: bool

Whether the integer is signed.

byte_order: ByteOrder

Byte order.

bit_offset: u16

Bit offset of the first significant bit.

bit_precision: u16

Number of significant bits.

FloatingPoint

IEEE 754 floating-point.

Fields

size: u32

Total size in bytes.

byte_order: ByteOrder

Byte order.

bit_offset: u16

Bit offset of the first significant bit.

bit_precision: u16

Number of significant bits.

exponent_location: u8

Bit position of the exponent field.

exponent_size: u8

Size of the exponent field in bits.

mantissa_location: u8

Bit position of the mantissa field.

mantissa_size: u8

Size of the mantissa field in bits.

exponent_bias: u32

Exponent bias.

String

Fixed-length or variable-length strings.

Fields

size: u32

Total size in bytes (0 for variable-length).

padding: StringPadding

Padding type.

charset: Charset

Character set.

Compound

Compound types (e.g., CFloat32 = {r: float32, i: float32}).

Fields

size: u32

Total size in bytes.

fields: Vec<CompoundField>

Member fields.

Enum

Enumerated types.

Fields

size: u32

Total size in bytes.

base_type: Box<DataType>

Underlying integer type.

members: Vec<(String, Vec<u8>)>

Enum member names and their raw values.

VarLen

Variable-length sequences or strings.

Fields

base_type: Box<DataType>

Base element type (for sequences) or u8 (for strings).

is_string: bool

True if this is a variable-length string (class bits type=1).

Array

Fixed-size array of another type.

Fields

base_type: Box<DataType>

Element type.

dimensions: Vec<u32>

Array dimensions.

Opaque

Opaque data.

Fields

size: u32

Total size in bytes.

tag: String

ASCII tag describing the opaque type.

Bitfield

Bitfield.

Fields

size: u32

Total size in bytes.

byte_order: ByteOrder

Byte order.

bit_offset: u16

Bit offset of the first significant bit.

bit_precision: u16

Number of significant bits.

Reference

Reference type.

Fields

size: u32

Total size in bytes.

ref_type: u8

Reference type (0 = object, 1 = region).

Implementations

impl DataType

pub fn size(&self) -> u32

Element size in bytes.

pub fn parse(data: &Bytes) -> Result<Self>

Parse a datatype message from raw bytes.

Trait Implementations

impl Clone for DataType

fn clone(&self) -> DataType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DataType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.