vfbLib.compilers.binary.BinaryTableCompiler

class vfbLib.compilers.binary.BinaryTableCompiler

Bases: BaseCompiler

A compiler that compiles binary table data.

__init__() → None

Methods

__init__()
compile(data[, master_count])	Compile the JSON-like main data structure and return the compiled binary data.
compile_hex(data[, master_count])	Compile the data given into a hex string format, e.g. "8c 8d 89 8b".
merge(masters_data, data)	Merge the data of additional masters into the main data structure.
write_bytes(value)	Write binary data to the stream.
write_double(value)
write_doubles(values)	Write several double-precision floats to the stream.
write_float(value[, fmt])	Write a float value to the stream.
write_floats(values)
write_int16(value)
write_int32(value)
write_str(value[, pad])
write_uint16(value)	Write a uint16 value to the stream.
write_uint32(value)
write_uint8(value)	Write a uint8 value to the stream.
write_value(value[, shortest])	Encode and write an int value to the stream.

compile(data: Any, master_count: int = 0) → bytes

Compile the JSON-like main data structure and return the compiled binary data.

The actual compilation is done by calling the _compile method, which must be implemented for all specialized compiler subclasses.

Parameters:

• data (Any) – The main data structure.

• master_count (int, optional) – The number of masters. Defaults to 0.

Returns:

The compiled binary data.

Return type:

bytes

compile_hex(data: Any, master_count: int = 0) → str

Compile the data given into a hex string format, e.g. “8c 8d 89 8b”. Used for testing.

Parameters:

• data (Any) – The input data

• master_count (int, optional) – Number of masters. Defaults to 0.

Returns:

The hex string

Return type:

str

classmethod merge(masters_data: list[Any], data: Any) → None

Merge the data of additional masters into the main data structure. This operates on the uncompiled JSON-like data structure.

Parameters:

• masters_data (List[Any]) – The additional masters data as a list with one entry per master.

• data (Any) – The main data structure.

write_bytes(value: bytes) → None

Write binary data to the stream.

Parameters:

value (bytes) – The data.

write_doubles(values: list[float]) → None

Write several double-precision floats to the stream.

Parameters:

values (list[float]) – The sequence of double-precision floats to write.

write_float(value: float, fmt: str = 'd') → None

Write a float value to the stream.

Parameters:

• value (float) – The float value to write.

• fmt (str, optional) – The format string. Defaults to “d”.

write_uint16(value: int) → None

Write a uint16 value to the stream.

Parameters:

value (int) – The integer to write.

write_uint8(value: int) → None

Write a uint8 value to the stream.

Parameters:

value (int) – The integer to write.

write_value(value: int, shortest=True) → None

Encode and write an int value to the stream. Optionally don’t apply the length encoding optimization.

Parameters:

• value (int) – The value to write to the stream.

• shortest (bool, optional) – Whether to write the shortest possible representation. Defaults to True.