mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-12 09:28:10 +00:00
63 lines
1.4 KiB
Python
63 lines
1.4 KiB
Python
from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from trezor.utils import BufferReader
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def read_compact_size(r: BufferReader) -> int:
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get = r.get # local_cache_attribute
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prefix = get()
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if prefix < 253:
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n = prefix
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elif prefix == 253:
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n = get()
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n += get() << 8
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elif prefix == 254:
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n = get()
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n += get() << 8
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n += get() << 16
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n += get() << 24
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elif prefix == 255:
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n = get()
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n += get() << 8
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n += get() << 16
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n += get() << 24
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n += get() << 32
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n += get() << 40
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n += get() << 48
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n += get() << 56
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else:
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raise ValueError
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return n
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def read_uint16_be(r: BufferReader) -> int:
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data = r.read_memoryview(2)
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return int.from_bytes(data, "big")
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def read_uint32_be(r: BufferReader) -> int:
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data = r.read_memoryview(4)
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return int.from_bytes(data, "big")
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def read_uint64_be(r: BufferReader) -> int:
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data = r.read_memoryview(8)
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return int.from_bytes(data, "big")
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def read_uint16_le(r: BufferReader) -> int:
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data = r.read_memoryview(2)
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return int.from_bytes(data, "little")
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def read_uint32_le(r: BufferReader) -> int:
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data = r.read_memoryview(4)
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return int.from_bytes(data, "little")
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def read_uint64_le(r: BufferReader) -> int:
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data = r.read_memoryview(8)
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return int.from_bytes(data, "little")
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